Numerical determination of the value of the calculated resistance of the base under the stamp of final stiffness, taking into account the rigidity over the foundation structure

Abstract

The task set in this study is to determine the values of the generalized strength parameter of the soil of the base σсв R , at which the depth ∆Z of the development of coulomb areas of plastic deformations under the edges of the foundation of final stiffness with a thickness H , loaded with a uniformly distributed load of variable intensity q, and a foundation of the same thickness bearing a rigid over the foundation structure of variable height H * will not exceed a quarter of the width of the foundation 2 b , that is, the values of σсв R , at which the calculation of the base sediment can be carried out in an elastic setting. As a result, it was established that the numerical values of the values σсв R * and σсв R , provided that 2 b H ≤6 and φÎ[20о-35о] do not differ significantly from each other, however, with other values of 2 b H , their difference becomes very significant. If 2 b H ≤6 , then the influence of the value EE о on the numerical values of σсв R * and σсв R can be neglected when performing engineering calculations, using the corresponding values σсв R or σсв R * . If the value of the reduced cohesion pressure is determined σсв =c( γо Htg φ) -1 , as some generalized indicator of the strength of the fixed soil, then using the graphs shown in Figures 3 and 4, it is possible to determine the values of σсв R * and σ св R , comparing which with the value of σсв , it can be concluded whether or not it is possible to calculate the sediment in a linear formulation. Focusing on the numerical values of σсв R * and σсв R , it is possible to determine the values of γо ; φ; c ; E о , which must be obtained in the process of fixing the soil base, so that the given external load does not exceed the value of the calculated resistance.