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- BASES AND FOUNDATIONS, UNDERGROUND STRUCTURES
- Parameters Of The Vibration Creep Of Sands Under Vibration Conditions Under Dynamic Three-Axis Compression
- UDC 624.131.5
doi: 10.33622/0869-7019.2026.03.51-56
Rashid A. MANGUSHEV1, geotechnica@spbgasu.ru
Lidia N. KONDRATIEVA1, geotechnica@spbgasu.ru
Vladimir N. PARAMONOV2, geotechnica@spbgasu.ru
Anatoliy I. OSOKIN1, geostroy-osokin@mail.ru
Alexandra V. VAGURINA1, alexandra.vagurina@yandex.ru
Konstantin V. MCHEDLIDZE1, geotechnica@spbgasu.ru
1 Saint Petersburg State University of Architecture and Civil Engineering, 2-ya Krasnoarmeyskaya ul., 4, St. Petersburg 190005, Russian Federation
2 Emperor Alexander I St. Petersburg State Transport University, Moskovskiy prospekt, 9, St. Petersburg 190031, Russian Federation
Abstract. In modern conditions, numerous sources of dynamic impact (transport, industrial equipment, seismic and hydrodynamic impacts, explosions and construction equipment) affect the soils in the zone of influence within the urban development. Long-term dynamic impact leads to the development of additional deformations of vibrocreep or liquefaction of water-saturated sandy soils - in fact, their transition to the third phase (destruction) of stressed state. The article presents the results of a laboratory study of the behavior of sandy soils of various sizes under conditions of dynamic triaxial compression at low frequencies of dynamic action. For coarse, medium-sized and fine sands, graphic dependencies of the values of relative deformation on the number of cycles and the frequency of vibration action (vibrocreep curves) are given. For fine sands, graphs of the increase in the reduced pore pressure depending on the number of dynamic loading cycles were obtained. A significant decrease in the modulus of deformation under the influence of vibrations was recorded. The results and recommendations obtained can be used in the selection of the technology for the construction of the pit fence, the installation of pile foundations, etc.
Keywords: dynamic triaxial compression, sandy soils, dynamic liquefaction, vibrocreep, pore pressure, reduced modulus of deformation - REFERENCES
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