Insulation systems using polyethylene foam with a seamless connection have proven themselves in the insulation of hangars, warehouses of agricultural products, livestock facilities, production facilities, garages. An independent area of their application can be insulating layers in flat roofs, including those roofs in operation, or in floating floor systems. The top layer of the structure can be made using reinforced concrete screed as well as fiber-cement or chrysotile cement sheets, and in this case there is a floor of dry assembly. The purpose of the research described in the article was to study the properties of foamed polyethylene and verify the results obtained during the reconstruction of an industrial building, as well as confirming the possibility of a seamless insulation shell obtaining in during installation of industrial floating floors using patented technology TEPOFOL (Patent No. 2645190). Results of the studies show that the compressive strength at 10% deformation depends on the thickness of the insulating layer and the area of application of the load, which is explained by the structural features of foamed polyethylene. With large areas of insulation, the insulation layer of foamed polyethylene withstands the loads typical of both «floating» industrial floors and flat exploited roofs with reinforced concrete screed over the insulating layer.

A.D. ZHUKOV¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
K.A. TER-ZAKARYAN², General Director, Author of an Invention;
I.V. BESSONOV³, Candidate of Sciences (Engineering);
V.S. SEMENOV¹, Candidate of Sciences (Engineering);
E.A. ZINOV’EVA¹, Engineer

¹ National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
² LLC “TEPOFOL” (3, Shcherbakovskaya Street, Moscow, 105318, Russian Federation)
³ Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow,127238, Russian Federation)

1. Umnyakova N.P., Tsygankov V.M., Kuzmin V.A. Experimental heat engineering research for the rational design of wall structures with reflective heat insulation. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2018. No. 1–2, рp. 38–42. (In Russian).
2. Zhukov A.D., Ter-Zakaryan K.A., Semenov V.S. Insulation systems with the expanded polyethylene application. ScienceDirect IFAC PaperOnLine. 2018. Vol. 51, Issue 30. Pр. 803–807. DOI: 10.1016/j.ifacol.2018.11.191.
3. Ivanov N.A. The main directions of prospects for the development of housing construction at the local level. Moskovskii ekonomicheskii zhurnal. 2018. No. 4, рp. 65–74. (In Russian).
4. Zhukov A.D., Ter-Zakaryan K.A., Bessonov I.V., Semenov V.S., Starostin A.V. Building insulation systems using polyethylene foam. Stroitel’nye Materialy [Construction Materials]. 2018. No. 9, рp. 58–61. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2018-763-9-58-61.
5. Ter-Zakaryan A.K., Zhukov A.D. Insulating shell of low-rise buildings. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2019. No. 8, рp. 35–40. (In Russian). DOI: https://doi.org/10.31659/0044-4472-2019-8-15-18
6. Zhukov A.D., Ter-Zakaryan K.A., Bessonov I.V., Lobanov V.A., Starostin A.V. Energy Efficiency of Seamless Insulating Shells. Stroitel’nye Materialy [Construction Materials]. 2019. No. 6, pp. 49–55. (In Russian). DOI: https://doi.org/10.31659/0585-430X-2019-771-6-49-55
7. Zhukov A.D., Ter-Zakaryan K.A., Semenov V.S., Kozlov S.D., Zinovieva E.A. and Fomina E.D. Insulation systems for buildings and structures based on polyethylene foam. IPICSE-2018. DOI: https://doi.org/10.1051/matecconf/201825101014
8. Patent RF 2645190. Zamkovaya tekhnologiya teploizolyatsionnogo materiala dlya besshovnoi svarki soedinitel’nykh zamkov [Castle technology of heat-insulating material for seamless welding of connecting locks]. Ter-Zakaryan K.A. Declared 26.09.2016. Published 16.02.2018. Bulletin No. 5. (In Russian).
9. Zhukov Alexey, Ter-Zakaryan Armen, Bobrova Ekaterina, Bessonov Igor, Medvedev Andrey, Mukhametzyanov Vitaly and Poserenin Alexey. Evaluation of thermal properties of insulation systems in pitched roofs. E3S 91, 02047 (2019) TPACEE-2018. DOI: https://doi.org/10.1051/e3sconf/20199102047
10. Pyataev Evgeni, Zhukov Alexey, Vako Kirill, Burtseva Marina, Elizaveta Mednikova, Maria Prusakova and Elizaveta Izumova. Effective polymer concrete on waste concrete production 02032. E3S Web of Conferences Volume 97 (2019). XXII International Scientific Conference “Construction the Formation of Living Environment” (FORM-2019). Tashkent, Uzbekistan, April 18–21, 2019. DOI: https://doi.org/10.1051/e3sconf/20199702032
11. Zinovieva EA, Zhukov A.D., Ter-Zakaryan A.K., Bessonov I.V. Dome House Vegetarian. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2019. No. 7, рp. 35–40. (In Russian). DOI: https://doi.org/10.31659/0044-4472-2019-7-35-40

In this paper, a study of the surface temperature of the FTCS-type wall was performed, considering solar radiation exposure under various cloud conditions during the month. Temperature sensors are mounted on the outer surface and its measurements are made, as well as the air temperature for one month of the warm period of the year. Measurements of the spectral coefficient of reflection of solar radiation by the facade surface were made, the value of which was used to calculate the absorption coefficient. At the Meteorological Observatory of Lomonosov Moscow State University, measurements of direct and diffuse solar radiation entering the horizontal surface were made, and the state of clouds in the sky was also recorded. The observation days are divided into three groups based on cloud conditions, and statistically significant differences between the groups are shown for the studied parameters. Using experimental data, hourly calculations of solar radiation entering the facade were performed. Using the measured air temperature, the values of direct and diffuse solar radiation, and the coefficient of absorption of solar radiation, the temperature of the outer surface of the wall is calculated using the Shklover’s formula. The measured values of the external wall surface temperature are compared with the calculated values. For days with no or little cloud cover, the differences reach 1.7 degrees, and on days with solid cloud cover, the differences are almost non-existent. Statistically significant differences were found between the measured and calculated temperature for groups of days divided by cloud conditions for the irradiation period from 10 to 17 hours, which indicates that it is possible to consider making amendments to the Shklover’s formula for clear days. It is planned to conduct longer studies of the temperature regime of the wall surface.

E.V. KORKINA^{1, 3}, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
E.V. GORBARENKO^{1, 2}, Сandidate of Sciences (Geography),
P.P. PASTUSHKOV^{1, 2}, Candidate of Sciences (Engineering);
M.D. TYULENEV³, Engineer

¹ Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow,127238, Russian Federation)
² Lomonosov Moscow State University (1, Leninskie gori, Moscow, 119234, Russian Federation)
³ National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

1. Gagarin V.G., Korkina E.V., Shmarov I.A. Teplopostupleniya i teplopoteri cherez steklopakety s povyshennymi teplozashchitnymi svoistvami. Academia. Arkhitektura i stroitel’stvo. 2017. No. 2, pp. 106–110. (In Russian).
2. Solov’ev A.K. Zerkal’nye fasady: ikh vliyanie na osveshchenie protivostoyashchikh zdanii. Svetotekhnika. 2017. No. 2, pp. 28–31. (In Russian).
3. Kupriyanov V.N., Sedova F.R. Obosnovanie i razvitie energeticheskogo metoda rascheta insolyatsii zhilykh pomeshchenii. Zhilishchnoe stroitel’stvo [Housing Construction]. 2015. No. 5, pp. 83–87. (In Russian).
4. Esquivias P.M., Moreno D., Navarro J. Solar radiation entering through openings: Coupled assessment of luminous and thermal aspects. Energy and Buildings. V. 175. 15 September 2018, pp. 208–218. DOI: https://doi.org/10.1016/j.enbuild.2018.07.021
5. Gagarin V.G., Zubarev K.P. Matematicheskoe modelirovanie nestatsionarnogo vlazhnostnogo rezhima ograzhdenii s primeneniem diskretno-kontinual’nogo podkhoda. Vestnik MGSU. 2020. Vol. 15. No. 2, pp. 244–256. (In Russian).
6. Khan R.J., Bhuiyan Md.Z., Ahmed D. H. Investigation of heat transfer of a building wall in the presence of phase change material (PCM). Energy and Built Environment. 2020, pp. 199–206. DOI: https://doi.org/10.1016/j.enbenv.2020.01.002
7. Vanaga R., Purvins R., Blumberga A., Veidenbergs I., Blumberga D. Heat transfer analysis by use of lense integrated in building wall. Energy Procedia. V. 128. 2017, pp. 453–460. DOI: https://doi.org/10.1016/j.egypro.2017.09.030
8. Agugiaro G., Nex F., Remondino F., Filippi R. De, Droghetti S., Furlanello C. Solar radiation estimation on building roofs and web-based solar cadaster. ­ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Melbourne, Australia. 2012. Vol. 1–2, pp. 177–182. DOI: https://doi.org/10.5194/isprsannals-I-2-177-2012
9. Stadnik V. V., Gorbarenko E. V., Shilovtseva O. A., Zadvornykh V. A. Sravnenie vychislennykh i izmerennykh velichin summarnoi i rasseyannoi radiatsii, postupayushchei na naklonnye poverkhnosti, po dannym nablyudenii v Meteorologicheskoi observatorii MGU. Trudy GGO. 2016. Vol. 581, pp. 138–154. (In Russian).
10. Pivovarova Z.I. Kharakteristika radiatsionnogo rezhima na territorii SSSR primenitel’no k zaprosam stroitel’stva [Characteristics of the radiation regime on the territory of the USSR in relation to construction requests]. Leningrad: Gidrometeoizdat. 1973. 128 p. (In Russian).
11. Shklover A.M., Vasil’ev B.F., Ushkov F.V. Osnovy stroitel’noi teplotekhniki zhilykh i obshchestvennykh zdanii [Fundamentals of construction heat engineering of residential and public buildings]. Moscow: Gosudarstvennoe izdanie literatury po stroitel’stvu i arkhitekture. 1956. 350 p. (In Russian).
12. Nauchno-prikladnoi spravochnik po klimatu SSSR. Se-riya 3. Mnogoletnie dannye [The scientific and application-oriented reference manual on climate of the USSR. Series 3. Long-term data]. Parts 1–6, issue 1–34. Saint-Petersburg: Gidrometeoizdat, 1989–1998. (In Russian).
13. Korkina E.V. Graficheskii metod rascheta postupayushchei na fasad pryamoi solnechnoi radiatsii pri nalichii protivostoyashchego zdaniya. Vestnik MGSU. 2019. Vol. 14. issue 2, pp. 237–249. DOI: https://doi.org/10.22227/1997-0935.2019.2.237-249. (In Russian).
14. Korkina E.V., Shmarov I.A. Analiticheskii metod rascheta rasseyannoi solnechnoi radiatsii, postupayushchei na vertikal’nuyu poverkhnost’ pri chastichno perekrytom nebosvode. Izvestiya vysshikh uchebnykh zavedenii. Tekhnologiya tekstil’noi promyshlennosti. 2018. No. 3 (375), pp. 230–236. (In Russian).
15. Glants S. Mediko-biologicheskaya statistika [Biomedical statistics]. Moscow: Praktika. 1998. 459 p. (In Russian).

During operation, reconstruction, and overhaul of buildings, it may be necessary to increase the sound insulation of existing fences to current regulatory values. One of the ways to improve sound insulation is the installation of a flexible plate with respect to the building envelope. Sound insulation of this design is influenced by various factors. In this work, we study experimentally the effect of a flexible plate on a relate of various sheet materials (gypsum board, cement particle board, oriented strand board) of various thicknesses, connected «dry» and in the form of layered vibration damped elements, with an air gap and filling it with sound-absorbing material. The acoustic efficiency of the studied structural solutions for the main structure of gypsum tongue-and-groove blocks and a plastered brick partition is shown. The effect on sound insulation is noted: surface density characteristics; there is an air gap and sound accompaniment; methods of connecting layers in the construction of flexible plates in the form of sheets, connecting «dry» and in the form of layered vibration damped elements from various sheet materials. It has been established that the ratio of the surface densities of the main structure and the flexible slabs on the relate significantly affects the amount of additional sound insulation, with an increase in the surface density of the flexible slab on the base with the invariable main structure, the additional sound insulation increases. It is shown that the use of flexible slabs in the relative form in the form of layered vibrodamped elements compared with sheets connected «dry» increase the sound insulation by 2–3 dB. With an increase in the surface density of the main structure, the effect of vibration absorption decreases.

N.A. KOCHKIN¹, Civil Engineer (senior lecturer) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
I.L. SHUBIN², Doctor of Sciences (Engineering), Correspondent member of RAACS, Director (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.A. KOCHKIN¹, Doctor of Sciences (Engineering), Docent (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Vologda State University (15, Lenin Street, Vologda, 160000, Russian Federation)
² Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences(21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

1. Lelyuga O.V., Ovsyannikov S.N., Shubin I.L. Researches of sound insulation of internal enclosing structures with regard to structural sound transmission. BST: Byulleten’ stroitel’noi tekhniki. 2018. No. 7 (1007), pp. 39–43. (In Russian).
2. Lelyuga O.V., Ovsyannikov S.N., Sukhov V.N. Noise of mechanical ventilation systems in residential buildings. BST: Byulleten’ stroitel’noi tekhniki. 2019. No. 6 (1018), pp. 10–12. (In Russian).
3. Bobylyov V.N. Monich D.V., Grebnev P.A. Popov S.R. Research of sound insulation of enclosing structures with connected elements. Privolzhskii nauchnyi zhurnal. 2019. No. 3 (51), pp. 13–17. (In Russian).
4. Kochkin N.A., Shubin I.L., Kochkin A.A. Research of increase in sound insulation of the existing protections with use of layered vibration damped elements. Izvestiya vysshikh uchebnykh zavedeniy. Tekhnologiya tekstil’noi promyshlennosti. 2019. No. 3 (381), pp. 215–219 (In Russian).
5. Kochkin A.A., Kiryatkova A.V., Shashkova L.E., Shu-bin I.L. About the method of increasing sound insulation double protective structures. BST: Byulleten’ stroitel’noi tekhniki. 2019. No. 6 (1018), pp. 6–7. (In Russian).
6. Kochkin N.A., Shubin I.L. Study of the influence of ways of connecting the flexible plate with a space on soundproofing of enclosing structures when reconstructing buildings. Zhilishchnoe Stroitel’stvo [Housing Constructions]. 2019. No. 7, pp. 9–15. (In Russian). DOI: 10.31659/0044-4472-2019-7-9-15
7. Bobylyov V.N., Dymchenko V.V., Erofeev V.I., Monich D.V., Khazov P.A. Analysis of the influence of a rack profile type on the sound insulation of a single-frame partition by finite-element modeling. Privolzhskiy nauchnyy zhurnal. 2019. No. 4 (52), pp. 18–22. (In Russian).
8. Bobylyov V.N., Dymchenko V.V., Monich D.V., Khazov P.A. Numerical simulation of sound-insulating framed partitions with various types of frame profiles. Privolzhskii nauchyi zhurnal. 2018. No. 1 (45), pp. 20–24. (In Russian).
9. Porozhenko M.A., Minaeva N.A., Sukhov V.N. Assessment of airborne sound insulation with a wall with a flexible plate to apply. Zhilishchnoe Stroitel’stvo [Housing Constructions]. 2016. No. 7, pp. 54–56. (In Russian).
10. Patent RF for useful model RU 186418 U1. Zvukoizoliruyushchaya konstruktsiya so sloistym vibropogloshchayushchim elementom na otnose [The soundproofing design with a layered vibration-absorbing element on carrying]. Kochkin A.A., Matveeva I.V., Kochkin N.A., Kiryatkova A.V. Declared 08.06.2018. Published 21.01.2019. Bulletin No. 3. (In Russian).
11. Kochkin A.A., Shubin I.L. Investigation of layered vibrodamped elements and structures from them for noise reduction. Izvestiya vysshih uchebnyh zavedeniy. Tekhnologiya tekstil’noy promyshlennosti. 2018. No. 3 (375), pp. 184–187. (In Russian).
12. Kochkin N.A., Kiryatkova A.V. Research and improvement of sound insulation of a double partition using layered vibration damped elements with a space. In: Sustainable development of the region: architecture, construction, transport. Materials of the 5th International scientific-practical conference of the Institute of architecture, construction and transport. 2018, pp. 182–185. (In Russian).
13. Shubin I.L., Kochkin N.A. To calculation of sound insulation of the protection at reconstruction of buildings with use of layered vibrodamped elements. Izvestiya vysshih uchebnyh zavedeniy. Tekhnologiya tekstil’noy promyshlennosti. 2018. No. 3 (375), pp. 236–241. (In Russian).
14. Gusev V.P., Sidorina A.V., Antonov A.I., Ledenev V.I. Calculation of additional sound insulation of air ducts with multilayered lining on them. Izvestiya vysshih uchebnyh zavedeniy. Tekhnologiya tekstil’noy promyshlennosti. 2018. No. 3 (375), pp. 202–207. (In Russian).
15. Patent RF for useful model RU 190244 U1. Ustanovka dlya issledovaniya dinamicheskikh kharakteristik zvukoizolyatsionnykh materialov [Installation for studying the dynamic characteristics of soundproof materials]. Ovsyannikov S.N., Skripchenko D.S. Declared 26.10.2018. Published 25.06.2019. Bulletin No. 18. (In Russian).

The results of theoretical and experimental studies of sound insulation of sandwich panels are presented. Samples of sandwich panels with gluing cladding and the middle layer and a sandwich panel with acoustic separation of the cladding and the middle layer were studied. Theoretical studies were carried out on the basis of the theory of self-coordination of wave fields, taking into account the resonant and inertial components of sound transmission. The reserves for improving the sound insulation of sandwich panels are determined, as the difference between their own sound insulation and the maximum sound insulation of the fence. The maximum sound insulation of the fence corresponds to the inertial sound transmission, while there is no resonant component. Based on the results of theoretical studies conducted, methods for improving the sound insulation of sandwich panels, which are presented in the form of a diagram, are determined. This article considers one of the ways to increase the sound insulation of sandwich panels by attaching additional claddings from sheet materials. Frequency characteristics of the coefficients of resonant and inertial sound transmission through the sandwich panels under study are presented. The results of experimental measurements confirm the theoretical conclusions about the effectiveness of the use of additional claddings to increase the sound insulation of sandwich panels in the normalized frequency range. Improving of sound insulation of sandwich panels is achieved by reducing of resonance and inertial sound transmission through the sandwich panels when the resonant frequency of the “mass-elasticity-mass” system is shifted to a lower frequency range.

V.N. BOBYLEV¹, Corresponding Member of Russian Academy of Architecture and Construction Sciences, Candidate of Sciences (Engineering),
P.A. GREBNEV¹, Candidate of Sciences (Engineering);
V.I. EROFEEV², Doctor of Sciences (Physics and Mathematics);
D.V. MONICH¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
L.A. TIKHOMIROV³, Researcher;
D.S. KUZMIN¹, engineer

¹ Nizhny Novgorod State University of Architecture and Civil Engineering (65, Ilyinskaya street, Nizhny Novgorod, 603950, Russian Federation)
² Mechanical Engineering Research Institute of the Russian Academy of Sciences – branch of Federal Кesearch Сenter, Institute of Applied Physics of the Russian Academy of Sciences (85, Belinskogo Street, Nizhny Novgorod, 603024, Russian Federation)
³ Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

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8. Thamburaj P., Sun J.Q., Optimization of Anisotropic Sandwich Beams for Higher Sound Transmission Loss. Journal of Sound and Vibration. 2001. Vol. 254, pp. 23–36.
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Industrial enterprises for various purposes, including energy facilities, located in urban development, create a noise regime with increased levels on its territory. Often, increased noise effects occur when sound energy is emitted from the mouths of gas-air systems of enterprises. The amount of sound power emitted by air ducts depends on the decline in its levels inside them and in the areas from the noise source to the radiation site. Therefore, the determination of sound power level drops in the air duct is an important task when assessing the impact of noise on urban development. The article considers possible ways to estimate the sound power level drops inside air ducts. It is shown that a combined method implementing a mirror-diffuse model of sound reflection from the walls of the air duct should be used to calculate the level drops in metal air ducts. It is also established that the method for calculating the decline in levels proposed in the GOST R EN 12354-5–2012 for noise estimation on separate straight sections of air ducts, responds well to change in parameters of the ducts and can be used when designing the air duct from the standpoint of environmental protection from the noise levels of various companies, including enterprises providing the life activity of the city.

V.P. GUSEV¹, Doctor of Sciences (Engineering);
V.I. LEDENEV², Doctor of Sciences (Engineering),
A.I. ANTONOV², Doctor of Sciences (Engineering),
I.V. MATVEEVA², Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)
² Tambov State Technical University (106, Sovetskaya Street, Tambov, 392000, Russian Federation)

1. Gusev V.P., Zhogoleva O.A., Ledenev V.I., Matveeva I.V. Calculation of noise of gas-air systems of thermal power plants in assessing their noise impact on buildings. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2019. No. 7, pp. 47–51. (In Russian). DOI: https://doi.org/10.31659/0044-4472-2019-7-47-51
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5. Snizhenie shuma v zdaniyakh i zhilykh raionakh. Pod red. G.L. Osipov, E.Ya. Yudin [Noise reduction in buildings and residential areas. Edited by G.L. Osipov, E.Ya. Yudin]. Moscow: Stroyizdat. 1987. 558 p. (In Russian).
6. Zhogoleva O.A., Zhogolev S.A., Solomatin E.O. Noise calculation in the design of sound insulation of gas-air channels (modern theory and practice). Vestnik Vologodskogo gosudarstvennogo universiteta. Seriya: Tekhnicheskie nauki. 2018. No. 2 (2), pp. 63–66. (In Russian).
7. Giyasov B.I., Ledenyov V.I., Matveeva I.V. Method for noise calculation under specular and diffuse reflection of sound. Inzhenerno-stroitel’nyj zhurnal. 2018. No. 1 (77), pp.13–22. (In Russian).
8. Antonov A.I., Ledenev V.I., Matveeva I.V., Fedorova O.O. Influence of the nature of sound reflection from fences on the choice of method for calculating air noise in civil and industrial buildings. Privolzhskij nauchnyj zhurnal. 2017. No. 2 (42), pp. 16–23. (In Russian).
9. Gusev V.P., ZHogoleva O.A., Ledenev V.I., Solomatin E.O. Method for evaluating the propagation of noise through the air channels of heating, ventilation and air conditioning systems. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2012. No. 6, pp. 52–54. (In Russian).
10. Tsukernikov I., Shubin I., Antonov A., Ledenev V., Nevenchannaya T. Noise сalculation method for industrial premises with bulky equipment at mirror-diffuse sound reflection. In Procedia Engineering of the 3rd International Conference on Dynamics and Vibroacustics of Mashines, DVM 2016. 2017, pp. 218–225.
11. Billon A., Picaut J., Valeau V., Sakout A. Acoustic Predictions in Industrial Spaces Using a DiffusionModel. Hindawi Publishing Corporation Advances in Acoustics and Vibration. 2012. ID 260394. DOI: https://doi.org/10.1155/2012/260394
12. Visentin C., Prodi N., Valeau V., Picaut J. A numerical and experimental validation of the room acoustics diffusion theory inside long rooms. 21st International Congress on Acoustics. (Canada). 2013.
13. Visentin C., Prodi N.. Valeau V., Picaut J. A numerical investigation of the Fick’s law of diffusion in room acoustics. The Journal of the Acoustical Society of America. 2012.
14. Foy C., Picaut J., Valeau V. Modeling the reverberant sound field by a diffusion process: analytical approach to the scattering. Proceedings of Internoise. (San Francisco). 2015.
15. Foy C., Picaut J., Valeau V.. Introduction de la diffusivity des parois au sein du modèle de diffusion acoustique. CFA. VISHNO. 2016.
16. Foy C., Valeau V., Picaut J., Prax C., Sakout A. Spatial variations of the mean free path in long rooms: Integration within the room-acoustic diffusion model. Proceedings of the 22 International Congress on Acoustics. (Buenos Aires). 2016.

For a long time, the calculation of exhaust ventilation systems was based on the assumption that there is no aerodynamic drag from the outside air to the exhaust grate. This statement was grounded on a large area of the window cracks. The new «dense» windows force designers to pay attention to the reduction of real air rates in comparison with the normalized ones. Currently, in order to save heat for heating the inflow outdoor air, it is advisable to consider that ventilation should provide a normalized air exchange only at the time when it is required by the consumer. In order to pass the required inflow air rate during the entire year when the ventilation system is used, the supply opening must be adjustable. Calculations of a residential 18-storey building air mode have shown that the best condition for regulating and providing sufficient space for the passage of the outdoor air is enabled by a folding window sash with an adjustable opening degree. Supply valves lead to an improper operation of the ventilation system, as they create a large aerodynamic drag and do not work properly even with increased cross-sections of the ventilation piping air ducts, especially on the upper floors.

E.G. MALYAVINA¹, Candidate of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
K.M. AGAKHANOVA¹, Master of Science (Engineering);
N.P. UMNYAKOVA², Doctor of Science (Engineering)

¹ National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
² Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

1. Malakhov M.A., Savenkov A.E. Experience of designing natural-mechanical ventilation in residential buildings with warm attics. AVOK. 2008. No. 6, pp. 20–32. (In Russian).
2. Livchak V.I. Decision on ventilation of multi-storey residential buildings. AVOK. 1999. No. 6, pp. 24–31. (In Russian).
3. Tertychnik E.I. Ventilyatsia [Ventilation]. Moscow: ASV, 2015. 608 p.
4. Datsyuk T.A., Ivlev Yu.P. Energy-Efficient solutions in ventilation practice on the basis of mathematical modeling. Proceedings: Theoretical foundations of heat and gas supply and ventilation. 2009. pp. 193–196. (In Russian).
5. Prokhorenko A.P., Sizenko O.A. Natural ventilation of buildings with a warm attic. Santekhnika, otoplenie, konditsionirovanie. 2011. No. 12 (120), pp. 82–83. (In Russian).
6. Baturin V.V., Elterman V.M. Aeration of industrial buildings. Moscow: Gosstroiizdat, 1963. 320 p.
7. Kitaytseva E.H. Algorithm for solving the problem of air regime of multi-storey buildings. Proceedings: Problems of mathematics and applied geometry in construction. 1982. No. 172, pp. 5–9. (In Russian).
8. Titov V.P. Method of analytical calculation of unorganized air exchange in buildings. Proceedings: energy Saving in heating, ventilation and air conditioning systems. 1985, pp. 130–141. (In Russian).
9. Voropaev V.N., Kitaytseva E.H. Matematicheskoe modelirovanie zadach vnutrennei aerodinamiki i teploobmena zdanii [Mathematical simulation of the internal aerodynamics and heat transfer of buildings]. Moscow: SGA, 2008. 337 p.
10. Malyavina E.G., Kitaytseva E.H. Natural ventilation of residential buildings. AVOK. 1999. No. 3, pp. 35–43. (In Russian).
11. Etheridge D.W. Natural Ventilation of Buildings: Theory, Measurement and Design. UK, D. W. Etheridge. – John Wiley & Sons. Chichester, 2012. 428 p.
12. Litiu A. Ventilation system types in some EU countries. REHVA Journal. 2012. No. 1 (49), pp. 18–23.
13. Jamaludin A.A., Hussein H., Ariffin A.R.M., Keumala N. A study on different natural ventilation approaches at a residential college building with the internal courtyard arrangement. Energy and Building. 2014. No. 72, pp. 340–352.
14. Yao J. The application of natural ventilation of residential architecture in the integrated design. IOP Conf. Series: Earth and Environmental Science. 2017. Vol. 61. No. 012139.
15. Allocca C., Chen Q., Glicksman L.R. Design analysis of single-sided natural ventilation. Energy and Buildings. 2003. No. 35, pp. 785–795.
16. Agakhanova K.M. Calculation of air regime of a residential building with individual exhaust channels. IOP Conference Series: Materials Science and Engineering. 2018. Vol. 365. No. 022036.
17. Malyavina E.G., Agakhanova K.M. Computational Study of a Natural Exhaust Ventilation System During the Heating Period. Advances in Intelligent Systems and Computing. 2019. Vol. 1, pp. 116–124.
18. Malyavina E.G., Agakhanova K.M. Influence of the Inlet Size on the Natural Ventilation System Operation in a Residential Multi-storey Building. IOP Con-ference Series: Materials Science and Engineering. 2018. Vol. 661. No. 012130.

The article presents a comprehensive analysis of existing approach to the standardization of curtain walls in the Russian Federation. The basic principles of domestic rationing in construction, as well as the mechanisms of their relationship with the field of translucent structures, were considered. The approaches used in modern construction practice, which are used to confirm the compliance of the actual design solution of translucent facades with the requirements of regulatory and technical documentation, are analyzed. Based on the analysis, it was found that at present, in the field of domestic standardization of curtain walls, a comprehensive approach to the normalization of technical characteristics of such structures is not yet applied. This is due to the lack of clear requirements and initial data in the current standards for assigning technical characteristics of curtain walls, as well as the lack of calculation methods in specialized regulatory documents to justify the majority of technical characteristics of such structures. Because of this, currently in the domestic construction practice, in most cases, when designing curtain walls, a limited range of issues is considered (first of all, providing thermal protection, fire safety, mechanical safety under the influence of wind loads). This does not allow us to comprehensively justify compliance with the requirements of the federal law «Technical regulations on the safety of buildings and structures» without conducting additional studies of the technical characteristics of curtain walls in specialized testing centers.

A.A. VERKHOVSKY¹, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.P. KONSTANTINOV², Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
V.A. SMIRNOV^{1, 2}, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)
² National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

1. Konstantinov A.P., Ibragimov A.M. Complex approach to the calculation and design of translucent structures. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2019. No. 1–2, pp. 14–17. (In Russian). DOI: https://doi.org/10.31659/0044-4472-2019-1-2-14-17
2. Plontikov A.A. Architectural and engineering principles and innovations in the construction of glass-facade buildings. Vestnik MGSU. 2015. No. 11, pp. 7–15. (In Russian).
3. Boriskina I.V. Zdaniya i sooruzheniya so svetoprozrachnymi fasadami i krovlyami. Teoreticheskie osnovy proektirovaniya svetoprozrachnyh konstrukcij [Buildings and Structures with Translucent Facades and Roofs. Theoretical Bases of Designing of Glass Constructions]. Saint-Petersburg: Lyubavich. 2012. 396 p. (In Russian).
4. Derbina S.N., Boriskina I.V., Plotnikov A.A. Evolution of translucent fasades design solutions. Vestnik MGSU. 2011. No. 2, pp. 26–35. (In Russian).
5. Galyamichev A.V. Wind load and its action on facade structures. Stroitel’stvo unikal’nyh zdanij i sooruzhenij. 2017. No. 9 (60), pp. 44–57. (In Russian). DOI: 10.18720/CUBS.60.4
6. Prevat D.O. Wind load design and performance testing of exterior walls: Current standards and future considerations. Performance of exterior building walls. ed. P. Johnson (West Conshohocken, PA: ASTM International, 2003), pp. 17–41. DOI: 10.1520/stp10925s
7. Marchand K., Davis C., Sammarco E., Bui J., Casper J. Coupled glass and structure response of conventional curtain walls subjected to blast loads: validation tests and analysis. Glass Structures & Engineering. 2017. Vol. 2, pp. 17–43. DOI: 10.1007/s40940-016-0037-y
8. Bezborodov V.I. Stability of translucent facades (walls) in real fire conditions. Fire Safety. 2019. No. 4 (97), pp. 71–77. (In Russian).
9. Kaziev M.M., Bezborodov V.I. Fire behavior of translucent facades of residential high-rise buildings. Natural and technogenic risks. Building Safety. 2019. No. 6 (43), pp. 35–38. (In Russian).
10. Kovyrshina N.V., Kleymenov M.I., Rzhanovsky A.V. Fire resistance tests of translucent facades. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2012. No. 3, pp. 10–13. (In Russian).
11. Phuong N. T. Kh., Solovyev A. K., Tamrazyan A. G. Integrated Approach to Determining Sizes of Light Openings in Buildings Taking into Account Safety Requirements. Promyshlennoye i grazhdanskoye stroitel’stvo [Industrial and Civil Construction]. 2019. No. 5, pp. 20–25. (In Russian). DOI: 10.33622/0869-7019.2019.05.20-25
12. Plotnikov A.A., Stratiy P.V. Numerical-analytical method of calculating insulated double-glazed units deflection under climatic (internal) load. Vestnik MGSU. 2014. No. 12, pp. 70–76. (In Russian).
13. Bedon C., Amadio C. Numerical assessment of vibration control systems for multi-hazard design and mitigation of glass curtain walls. Journal of Building Engineering. 2018. Vol. 15, pp. 1–13. DOI: 10.1016/j.jobe.2017.11.004
14. Casagrande L., Bonati A., Occhiuzzi A., Caterino N., Auricchio F. Numerical investigation on the seismic dissipation of glazed curtain wall equipped on high-rise buildings. Engineering Structures. 2019. Vol. 179, pp. 225–245. DOI: 10.1016/j.engstruct.2018.10.086
15. Granovsky A.V., Dzhamuev B.K., Voroshilov S.F., Vostrikova L. N. Study of Operation of Translucent Facade Structures under the Action of Dynamic Loads Simulating Seismic Impacts. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2018. No. 12, pp. 32–37. (In Russian).
16. Chubakov M.J., Akbiev R.T. Seismic and dynamic stability of hinged facades and translucent constructions. Natural and technogenic risks. Building Safety. 2017. No. 3 (29), pp. 44–45. (In Russian).
17. Vahrushev K. G., Konstantinov A. P. Classification of curtain walls: Analysis of classification features. Promyshlennoe i grazhdanskoe stroitel’stvo [Industrial and Civil Engineering]. 2019. No. 7, pp. 84–91. (In Russian). DOI: 10.33622/0869-7019.2019.07.84-91
18. Bezrukov A., Verchovskiy A., Royfe V. Technical regulation in the field façade of translucent structures. Stroitel’stvo i rekonstruktsiya. 2016. Vol. 65. No. 3, pp. 96–102. (In Russian).

The article considers some results of the implementation of program measures to improve energy efficiency in the housing sector. The analysis of cooperation with other countries is presented, the directions and content of Russia’s interaction with some countries in terms of improving the energy efficiency of the housing stock are studied. The assessment of the new regulatory framework showed that Russia has significantly improved its position in the rating among countries for implementing energy efficiency policies. The paper also considers the main directions of development of the policy of «green construction» and certification of buildings according to international standards. Based on the example of the implementation of best European practices in the construction of new residential complexes, it is concluded that the ongoing activities to improve the energy efficiency of housing certainly has positive results. However, as the European experience shows, success in promoting energy conservation depends not only on a developed legal framework and the availability of technologies, but also on a well-thought-out policy among the population and energy resource producers. On this basis, the existing political and financial factors that are the main obstacle to improving the consumer quality of housing and the comfort of living in existing buildings are identified. In addition to developing the legal framework and mechanisms for financing energy saving in housing construction, Russian still has a lot of work to do to create an eco-friendly culture.

S.G. SHEINA¹, Doctor of Sciences (Engineering);
N.P. UMNYAKOVA², Candidate of Science (Engineering);
P.V. FEDYAEVA¹, Candidate of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
E.N. MINENKO¹, Candidate of Science (Engineering)

¹ Don State Technical University (1, Gagarina Rostov-on-Don, 344000, Russian Federation)
² Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

1. Yakovlev A.S., Barysheva G.A. Energy efficiency and energy saving in Russia against the background of the experience of foreign countries. Izvestiya Tomsk Polytechnic University. 2012. Vol. 321, No. 6, pp. 25–30. (In Russian).
2. Bashmakov I.A., Bashmakov V.I. Sravnenie mer rossiiskoi politiki povysheniya energoeffektivnosti s merami, prinyatymi v razvitykh stranakh [Comparison of measures of the Russian energy efficiency policy with measures taken in developed countries]. Moscow: Center for effective energy use (CENEF). 2012. 67 p.
3. Mingaleva Zh.A., Deputatova L.N., Starkov Y.V. Application of the rating method of estimation of efficiency of state environmental policy: comparative analysis of Russia and foreign countries. Ars Administrandi (Art of management). 2018. Vol. 10, No. 3, pp. 419–438. (In Russian). DOI: 10.17072/2218-9173-2018-3-419-438
4. Blanc I., Friot D., Margni M., Jolliet O. Towards a New Index for Environmental Sustainability Based on a DALY Weighting Approach // Sustainable Development. 2008. Vol. 16, No. 4, pp. 251–260. DOI: https://doi.org/10.1002/sd.376
5. Umnyakova N.P. Heat exchange peculiarities in ventilated facades air cavities due to different wind speed. Advances and Trends in Engineering Sciences and Technologies II. CRC Press, Taylor & Francis Group, London, UK. 2017, pp. 655–660.
6. Basov A.V. Technical regulation and standardization in construction. Zhilishchnoe Stroitel’stvo [Housing Constructions]. 2019. No. 1–2, pp. 3–7. (In Russian). DOI: https://doi.org/10.31659/0044-4472-2019-1-2-3-7
7. Sedash T.N. Using foreign experience in improving energy efficiency in the Russian economy. Finansovaya analitika: problemui i resheniya. 2013. No. 9 (147), pp. 30–35. (In Russian).
8. Gagarin V.G, Kozlov V.V. Regulation of heat protection and energy consumption requirements for heating and ventilation in the updated version of the SNiP “Thermal protection of buildings”. Vestnik VolgGASU. Seriya: Stroitelstvo i arhitectura. 2013. No. 31–2 (50), pp. 468–474. (In Russian).
9. Gaevskaya Z.A., Lazareva U.S., Lazarev A.N. Chronology of changes in requirements for energy efficiency of buildings. Molodoi uchenuii. 2016. No. 18 (122), pp. 68–72. URL: https://moluch.ru/archive/122/33657/ (Date of access: 24.04.2020). (In Russian).
10. Sheina S.G., Minenko E.N. Assessment of the stability achieved by the building due to the implementation of energy-saving solutions. Ingenernuii vestnik Dona. 2017. No. 4. URL: ww.ivdon.ru/ru/magazine/archive/n4y2017/4398. (Date of access: 24.04.2020). (In Russian).
11. Sheina S.G., Minenko E.N. and Sakovskaya K.A. Complex Assessment of Resource-Saving Solutions Efficiency for Residential Buildings Based on Sustainability Theory. MATEC Web of Conferences – International Conference on Trends in Manufacturing Technologies and Equipment (ICMTMTE 2017). 2017. Vol. 129. Modern–Number of article 05020 (2018).
12. Sheina S.G, Minenko E.N. Green construction as the basis for sustainable development of urban territories. Nedvizhimost: ekonomika, upravlenie. 2015. No. 2, pp. 55–60. (In Russian).
13. Sheina S.G., Umnyakova N.P., Minenko E.N. Management for sustainable resource conservation in housing Russian cities. Izvestiya vuishuih uchebnuih zavedenii. Tehnologiya textilnoi promuishlennosti. 2017. No. 2 (368), pp. 277–281. (In Russian).
14. Sheina S.G., Grachev K.S. Best European practices for implementing renewable energy sources in the Russian Federation. Ingenernuii vestnik Dona. 2019. No. 5. URL: ivdon.ru/ru/magazine/archive/n5y2019/5993. (Date of access: 24.04.2020). (In Russian).
15. Girya L.V., Sheina S.G., Fedyaeva P.V. The procedure of substantiation of selection of the energy-efficient design solutions for residential buildings. International Journal of Applied Engineering Research. 2015. No. 8, pp. 19263–19276.

The technical inspection stages of a non-residential administrative building are discussed in this article. The authors presents the survey results of foundations and soils, walls, columns, pillars, racks, floors, stairs, roofs. The survey purpose was to identify defects, determine the current technical structures condition, establish the damage degree and the technical condition category of building structures. The following types of work were performed in order to achieve the goals that set in this work: familiarization with the inspection object, building measurements, visual building structures inspection from the inside with the identification, classification and description of defects, drawing up diagrams and defects and damages statements, studying the corrosion building structures state, cameral results processing, recommendations development for eliminating identified defects and structural damage.

V.I. RIMSHIN¹, Doctor of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
E.S. KETSKO², Master of Science (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
P.S. TRUNTOV¹, Bachelor

¹ National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)
² Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

1. Schreiber K.K., King E.A. Theoretical aspects of the formation of the regulatory and methodological framework for the overhaul of the common property of apartment buildings. Vestnik MGSU. 2019. Vol. 14. No. 11 (134), pp. 1473–1481. (In Russian).
2. Sumerkin Yu.A., Telichenko V.I. Environmental Safety Assessment of Household Territories of Residential Areas. Promyshlennoe i grazhdanskoe stroitel’stvo. 2017. No. 6, pp. 75–79. (In Russian).
3. Kuzina E.S. The method of reinforcing the supporting structures of buildings and structures with carbon fiber. Safety of the Russian construction fund. Problemy i resheniya. 2016. No. 1, pp. 165–170. (In Russian).
4. Kuzina E.S. Assessment of the technical condition of Moscow metro structures falling into the zone of influence of construction. Universitetskaya nauka. 2016. No. 1 (1), pp. 78–82. (In Russian).
5. Kuzina E., Rimshin V. Deformation monitoring of road transport structures and facilities using engineering and geodetic techniques. Advances in Intelligent Systems and Computing. 2017. Vol. 692, pp. 410–416.
6. Rimshin V.I., Kuzina E.S., Filkova N.V. Methods of technical inspection of the walls of a residential building in the city of Moscow for activities during the overhaul. Vestnik Belgorodskogo gosudarstvennogo tekhnologicheskogo universiteta im. V.G. Shukhova. 2017. No. 8, pp. 47–51. (In Russian).
7. Rimshin V.I., Kuzina E.S., Filkova N.V. Engineering methods for the inspection of a residential building in the city of Moscow during the work of the capital repair program. Vestnik Belgorodskogo gosudarstvennogo tekhnologicheskogo universiteta im. V.G. Shukhova. 2017. No. 7, pp. 36–40. (In Russian).
8. Rimshin V.I., Kuzina E.S., Neverov A.N. The principles of instrumental examination of the walls of an apartment building in the organization of major repairs. Nedvizhimost’: ekonomika, upravlenie. 2017. No. 2, pp. 37–40. (In Russian).
9. Kuzina E., Rimshin V. Strengthening of concrete beams with the use of carbon fiber. Advances in Intelligent Systems and Computing. 2019. Vol. 983, pp. 911–919.
10. Rimshin V.I., Truntov P.S. Comprehensive survey of the technical condition of building structures exposed to fire. Universitetskaya nauka. 2019. No. 2 (8), pp. 12–16. (In Russian).
11. Telichenko V.I., Benuzh A.A., Mochalov I.V. Formation of a comfortable urban environment. Nedvizhimost’: ekonomika, upravlenie. 2017. No. 1, pp. 30–33. (In Russian)

The paper studies the trenchless installation of pipes by microtunneling method under a curtain wall (section between towers) between Setunskaya and Zatrapeznaya towers of the Novodevichy monastery – the architecture monument of Federal significance. Design of utilities reconstruction at the historical and architectural ensemble’s site was done under scientific supervision. Scientific supervision was provided by the laboratory «Soil bases, foundations and underground structures» of the Scientific-Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences. Installation works on the utilities were conducted in difficult geological and hydrogeological conditions, characterized by the presence of anthropogenic soils, soft water saturated soils – fine sands, also of loose density, and a high ground water level. The technology of microtunneling works is described. A general layout of the AVN 500 shield is given which was used for the rainwater pipes installation under the monastery’s curtain wall. The article analyzes the results of determining the soil overcut V_L during microtunneling according to the formula recommended by SP 249.1325800.2016 «Underground utilities» for preliminary assessment of the V_L value, by the empirical method, as well as from observation data of the curtain wall structure after the end of a shield boring. The article demonstrates that the installation of utilities by microtunneling on cultural heritage sites ensures their preservation.

V.A. ILYICHEV^{1, 2}, RAACS academic, Doctor of Sciences (Engineering), (This email address is being protected from spambots. You need JavaScript enabled to view it.);
N.S. NIKIFOROVA^{2, 3}, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.V. KONNOV², engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.);
D.V. EMELIANOV³, master's student

¹ Russian Academy of Architecture and Construction Sciences (24 stroenie 1, Bolshaya Dmitrovka, Moscow, 107031, Russian Federation)
² Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)
³ National Research Moscow State University of Civil Engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation)

1. Morozova Yu.A. Trenchless pipeline laying using horizontal directional drilling technology. Innovatsionnaya nauka. 2018. No. 11, pp. 34–36. (In Russian).
2. Morozova Yu.A. Technology of trenchless laying of utility pipelines. Innovatsionnaya nauka. 2018. No. 1 (5), pp. 41–45. (In Russian).
3. Fetisova M.A., Gorshkov D.N., Strakhov K.A. Pipelines installation without opening trenches. Molodoi uchenyi. 2014. No. 4, pp. 287–289. (In Russian).
4. Lopatina A.A., Sazonova S.A. Analysis of pipe laying technologies. Vestnik PNIPU. Stroitel’stvo i arkhitektura. 2016. No. 1, pp. 93–111. (In Russian).
5. Beletskii B.F. Tekhnologiya prokladki truboprovodov i kollektorov razlichnogo naznacheniya [Technology of laying pipelines and collectors for various purposes]. Moscow: Stroyizdat, 1992. 327 p.
6. Dubenskikh M.S., Kargin A.A., Gilyazidinova N.V. Trenchless technologies of utilities installation. Young Russia: II Russian scientific and practical confеrence. Kemerovo. 2010, pp. 397–399. (In Russian).
7. Korzun N.L., Balkanov A.A. Justification for the use of microtunneling for utility systems installation in urban areas. Izvestiya vuzov. Investitsii. Stroitel’stvo. Nedvizhimost’. 2014. No. 1 (6), pp. 50–66. (In Russian).
8. Castelli F., Motta E. Nunerical analysis for provision of tunneling – induced ground deformation in granular soil. 5th International symposium “Geotechnical Aspects of Underground Construction in Soft Ground. Netherlands. 2005.
9. Ilyichev V.A., Nikiforova N.S., Tupikov M.M. Surface deformations induced by low-depth utility tunnels installation. Stroitel’stvo i rekonstruktsiya. Izvestiya OrelGTU. 2009. No. 6/26 (574). (In Russian).
10. Ilyichev V.А., Konovalov P.A., Nikiforova N.S., Tupikov M.M. Prediction of surface deformations, caused by shallow service tunnels construction activities in Moscow. Proc 17th International Conference on Soil Mechanics and Geotechnical Engineering (17th ICSMGE). Egypt, Alexandria. 2009, pp. 1993–1996.
11. Isaev O.N., Sharafutdinov R.F Soil overcut during construction of utility tunnels by shield method. Mekhanizatsiya stroitel’stva. 2012. No. 6, pp. 2–7. (In Russian).
12. Martin Herrenknecht Microtunneling with Herrenknecht MicroMachines. Soft Ground and Hard Rock Mechanical Tunneling Technology Seminar. Colorado School of Mines. 2003, pp. 1–13.
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The forecast and assessment of noise levels from suburban electric trains in the premises of the designed research linguistic center where offices, conference rooms, lecture halls, and premises for webinars are located, where the noise level must meet regulatory requirements, was made. Train flows are considered as sound sources. Noise characteristics of sound sources were determined using field measurements and calculation based on traffic intensity data. It is showed shows that the use of standard methods according to GOST 33325-2015 and SP 276.1325800.2016 in non-typical cases of track arrangement, when part of the trains passes in a tunnel, leads to significantly inflated values of the noise characteristics of train flows, and consequently, the forecast results, and requires adjustment of the calculated values of noise characteristics based on the results of field measurements.

I.E. TSUKERNIKOV^{1, 2}, Doctor of Sciences (Engineering);
L.A. TIKHOMIROV¹, Engineer (This email address is being protected from spambots. You need JavaScript enabled to view it.),
N.E. SHCHUROVA¹, Engineer;
T.O. NEVENCHANNAYA^{1, 2}, Doctor of Sciences (Engineering)

¹ Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)
² Moscow Polytechnic University (38, Bolshaya Semyonovskaya Street, Moscow, 107023, Russian Federation)

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In residential buildings often are placed in enterprises for public use. A special feature of such enterprises is the presence of high noise levels in their premises. Noise has a negative impact on employees and visitors of enterprises, leading to noise in adjacent apartments. Most noise-producing sources emit non-constant sound power over time. As a result, non-permanent noise fields are formed in the premises. The calculation of their energy characteristics has a number of features. To assess the noise in such rooms, the article offers a calculation method based on the idea of the diffuse nature of sound reflection from fences. The method uses a statistical energy model that describes the distribution of reflected energy in closed air volumes in time and space. The direct difference method is used to implement the calculation model. The principles of construction of the calculation method are described, and its accuracy is estimated. It was found that the calculated declines in sound pressure levels over time at the calculated points are in good agreement with experimentally determined declines, and the error in calculating the levels does not exceed 3 dB. The accuracy of calculations is sufficient to evaluate the noise regime and design construction and acoustic means of reducing non-constant noise in time. The method allows you to make calculations in rooms with any complex space-planning parameters, and can be used in the design of noise protection measures in premises built into residential buildings of enterprises.

I.L. SHUBIN¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.I. ANTONOV², Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
V.I. LEDENEV², Doctor of Sciences (Engineering),
I.V. MATVEEVA², Candidate of Sciences (Engineering),
N.P. MERKUSHEVA², Master of Science (Engineering)

¹ Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)
² Tambov State Technical University (106, Sovetskaya st., Tambov, 392000, Russian Federation)

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