Experience in Conducting Field Tests of a Barrette of Long Length under Conditions of Dense Urban Development

Evaluation of the bearing capacity of the pile by analytical methods and further verification of these values by field tests is an important aspect of the design of pile foundations. The article presents the experience in organization and conducting field tests of a reinforced concrete barrette with the use of the method of the wave theory of impact under the conditions of the existing development. An assessment of the possibility of using this method under the conditions of the tight construction site is made. The experimental data obtained confirm the providing of bearing capacity of the barrette on the ground with excess within the range of 5–20% at the calculated level of vertical displacements. This shows a good convergence of the numerical methods of modeling of operation of a long barrette in the soil when designing. Tests of barrettes were conducted without damage to their performance. The continuity and homogeneity of the barrette design was confirmed in the course of the test conducting. Fixed speeds of fluctuations of the structures of the surrounding development are substantially below the maximum permissible values. Vibrations of the material caused by the impact, for the most part spread in the body of the structure, and sharply damped in the ground outside its limits.

O.A. MAKOVETSKY¹, Candidate of Sciences (Engineering);
S.S. ZUEV², Deputy General Director

¹ Perm National Research Polytechnic University (29, Komsomolsky Avenue, Perm, 614019, Russian Federation)
² JSC “New Ground” (35, Kronshtadtskaya Street, Perm, 614081, Russian Federation)

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