FIELD STUDIES OF SLAB FOUNDATIONS’ SETTLEMENTS FOR TWO-SECTION MULTI-STOREY BUILDING ON WEAK WATER-SATURATED SOILS

Abstract

Problem statement. In the construction of multi-storey and high-rise buildings with significant loads on the foundation, especially in the presence of weak water-saturated soils from above, pile and slab foundations are usually used to meet the requirements of the building code [1] on the maximum permissible deformations. The possibility of using slab foundations in this case must be confirmed by calculations with a scientific and technical justification of the accepted model of the soil foundation and its parameters. The purpose of the article is to substantiate the application of the model of the soil base in the form of finite width elastic layer and its parameters based on observations of the subsidence of adjacent multi-story buildings on slab foundations during the construction process and to compare the actual values of foundation deformations with calculated. Conclusions. The research results confirmed the possibility of applying the model of the soil base in the form of finite width elastic layer for predicting the deformations of equally story sectional buildings on large-sized slab foundations, the basis of which are weak water-saturated sandy soils from the surface. However, it should be noted that in this case, the excess of the actual settlement of buildings over the estimated is due to the failure to take into acount the processes of filtration consolidation and mechanical suffusion of sand particles into the crushed stone bed, which can further be taken into acount by reducing of soil deformation modules in this model of the soil base.