The Effect of the Technological Impact of the Manufacture of a Horizontal Diaphragm by Jet-Grouting on the Enclosure of a Pit of the “Wall In The Ground” Type

The results of monitoring and numerical calculation during the phased production of “zero” cycle works at the reconstruction facility in the conditions of dense historical development of the central part of St. Petersburg are presented. Based on the materials of observations, the technological influence of the Jet-diaphragm arrangement on the enclosure of the pit has been established – under the influence of soil consolidation work, the stress-strain state of the “wall in the ground” changes. It is established that before the beginning of the main stages of the “zero” cycle, the structure receives initial efforts and displacements in the direction “from the pit”, which determine the subsequent nature of the fence work. As the excavation is being developed and the structures of the underground part of the building are being erected, there is some redistribution of the received efforts and movements, but their maximum values remain at the mark of the location of the deep Jet diaphragm, which differs from the results of numerical modeling performed without taking into account the technological impact of the work on fixing the soil.

R.A. MANGUSHEV¹, Corresponding Member of RAAC, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
O.O. DENISOVA², Chief Designer (This email address is being protected from spambots. You need JavaScript enabled to view it.)

¹ Saint Petersburg State University of Architecture and Civil Engineering (4, Vtoraya Krasnoarmeiskaya Street, Saint Petersburg, 190005, Russian Federation)
² LLC “Bureau of Expertise and Improvement of Design Solutions St. Petersburg” (113, Lit. A, Fontanka River Embankment, Saint Petersburg, 190031, Russian Federation)

1. Mangushev R.A., Nikiforova N.S. ekhnologicheskie osadki zdanii i sooruzhenii v zone vliyaniya podzemnogo stroitel’stva [Technological precipitation of buildings and structures in the zone of influence of underground construction]. Moscow: ASV. 2017. 168 p.
2. Ulitsky V.M., Shashkin A.G., Shashkin K.G. Gid po geotekhnike (putevoditel’ po osnovaniyam, fundamentam i podzemnym sooruzheniyam) [Guide to geotechnics (guide to foundations, foundations and underground structures)]. Moscow: PI ”Georekonstruktsiya”. 2012. 288 p.
3. Ermolaev V.A., Matsegora A.G., Osokin A.I., Ivanishchev V.B., Bezrodny K.P., Maslak V.A. Technological features of soil consolidation in the geological conditions of the densely built-up part of St. Petersburg. Proceedings of the International Conference on Geotechnics. Saint Petersburg. 2010. Vol. 5, pp. 1825–1829. (In Russian).
4. Malinin A.G. Struinaya tsementatsiya gruntov [Jet cementation of soils]. Moscow: Stroyizdat. 2010. 226 p.
5. Jahiro T., Joshida H. The characteristics of high speed water jet in the liquid and its utilization on induction grouting method. II International symposium on jet cutting technology. Cambridge. 1974, pp. 441–462.
6. Burke G.K., Koeling M.A. Special application for jet grouting: underpinning, excavation support and ground water control. Proceeding of Canadian Geotechnical Conference. Vancouver. 1995.
7. Kutzner C. Grouting of rock and soil. Rotterdam: BookPublisher A.A. Balkema, 1996. 271 p.
8. Garassino A. Design Procedures for Jet-Grouting. Seminar on jet grouting. Singapore. 1997, pp. 15–48.
9. Bringiotti M., Bottero D. Consolidamenti & Fondazioni. Guida alle moderne metodologie di stqabiluzzazione e rinforzo dei terreni. Parma. 1999.
10. Khasin M.F., Malyshev L.I., Broyd I.I. Jet technology of soil strengthening. Osnovaniya, fundamenty i mekhanika gruntov. 1984. No. 5, pp. 10–12. (In Russian).
11. Gladkov I.L., Zhemchugov A.A., Malinin D.A. Technology of jet cementation of soils in conditions of dense urban development. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2013. No. 9, pp. 6–9. (In Russian).
12. Gotman Yu.A. Determination of the optimal dimensions of the grunt-cement array that reduces the movement of fences of deep pits. Cand. Diss. (Engineering). Moscow. 2011. 186 p. (In Russian).
13. Gutovsky V.E., Mangushev R.A., Konyushkov V.I. Determination of strength characteristics of a ground-cement array made using Jet grouting technology in engineering-geological conditions. Vestnik grazhdanskikh inzhenerov. 2010. No. 2, pp. 69–76. (In Russian).
14. Ilyichev V.A., Gotman Yu.A. Calculation of a ground-cement array to reduce the movement of the fence by the optimal design method. Osnovaniya, fundamenty i mekhanika gruntov. 2011. No. 4, pp. 17–25. (In Russian).
15. Kashevarova G.G., Khusainov I.I., Makovetsky O.A. Comparative analysis of experimental and calculated deformations of a soil massif fixed by jet cementation. International Journal for Computational Civil and Structural Engineering. 2012. No. 2, pp. 126–132 (In Russian).
16. Chernyakov A.V. Application of jet cementation of soils in conditions of historical development. Zhilishchnoe Stroitel’stvo [Housing Construction]. 2011. No. 9, pp. 24–26. (In Russian).