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Modelling of the soil base of a building foundation near a deep excavation

https://doi.org/10.22227/2305-5502.2025.1.11

Abstract

Introduction. The densification of urban development necessitates the construction of buildings with a developed underground volume. At the same time, the foundations of existing buildings are located on the edge of the deep excavation. The task of assessing the impact of the construction of deep foundations on the surrounding buildings is important and relevant. The analysis of data on foundation settlements near the sides of deep excavations was carried out based on the results of numerical modelling and geotechnical monitoring in the studies of Russian and foreign authors.

Materials and methods. To assess additional settlements of building foundations near deep excavations, research of the stress-strain state of the foundation near a deep excavation was carried out using a model created in laboratory in a flat tray with transparent walls. The displacement values were recorded using video recording and electronic sensors, then processed.

Results. The results of the experiment are consistent with the results of other authors. A law was established for the distribution of horizontal stresses and displacements in the soil mass outside the deep excavation model. Based on the identified patterns, a method was proposed for calculating the settlement of foundations near deep excavations, taking into account changes in the stress-strain state in the surrounding soil.

Conclusions. Based on the results of the study, a pattern of uneven changes in the stress-strain state of soils at the base of building foundations on the edge of excavations was established. The deformation of the soil mass at the base of the foundations of buildings located in the collapse prism occurs nonlinearly and unevenly. The construction of deep excavations leads to a change in the stress-strain state of the soil mass of the base of the foundations located on the edge of the excavation. This leads to a change in the ratio of vertical and horizontal stresses, which causes a change in the deformation characteristics of the soil, resulting in an increase in settlement.

About the Authors

I. T. Mirsayapov
Kazan State University of Architecture and Engineering (KSUAE)
Russian Federation

Ilizar T. Mirsayapov — Doctor of Technical Sciences, Professor, Head of the Department of Bases, foundations, building dynamics and engineering geology

1 Zelenaya st., Kazan, 420043, Republic of Tatarstan



N.  N. Aysin
Kazan State University of Architecture and Engineering (KSUAE)
Russian Federation

Niyaz N. Aysin — senior lecturer of the Department of Bases, foundations, building dynamics and engineering geology

1 Zelenaya st., Kazan, 420043, Republic of Tatarstan



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For citations:


Mirsayapov I.T., Aysin N.N. Modelling of the soil base of a building foundation near a deep excavation. Construction: Science and Education. 2025;15(1):105-114. (In Russ.) https://doi.org/10.22227/2305-5502.2025.1.11

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