Subgrade vertical deformations of a building in the zone of a deep pit influence

Abstract

The existing methods for calculating the settlements of the foundations of buildings are developed for the soil mass without defects and damage. It is also assumed that the physical and mechanical characteristics of the soil are constant throughout the life cycle of buildings and structures. But the mechanical characteristics of subgrade soils are unstable and continuously change under the influence of various factors. The use of existing methods of calculation leads to inadequate settlement estimates of the subgrade and foundations of buildings and structures. In this regard, this work has developed a method for calculating the settlements of bases and foundations of buildings, taking into account the formation and development of defects and damages in the soil structure in the zone of influence of a deep pit. This method allows you to take into account the influence of factors such as dilation, formation and development of cracks, hardening, changes in the friction angle, shear modulus and deformation modulus. The developed method was tested on a real reconstructed object. Geotechnical monitoring for one year confirmed the results of calculations using the proposed methodology.