The article is offered refined and simplified methods for determination of non-uniform settlements caused by decompression of soil in the excavation. The results of the calculations executed taking into account the done suggestions and in the program Plaxis are presented. The results of the calculations are compared with the results of experimental observations given in the literature. The influence of the excavation parameters on the non-uniform settlements is investigated. Present a proposal for adjustment of the conditions, which require consideration of soil decompression in the excavation.

The article considers the reduction of uneven deformations of the base of the foundations of a five-story building, caused by local subsidence of the soil, through the use of strip self-adjusting foundations. The dependences of settlement, subsidence and stiffness coefficient of the self-adjusting foundation base on the load acting on it were obtained. Using the obtained dependences, numerical studies of the interaction of a building with a non-uniformly deformed subsidence base were performed. The results obtained showed the effectiveness of the use of self-adjusting foundations to reduce uneven deformations of the base and ensure the operational suitability of frameless buildings on subsiding soils. The uneven deformation of the base under the given conditions was reduced by about two times due to an increase in the penetration of the foundation into the ground. At the same time, the maximum shear stresses in the walls of the building decreased by about 30%.