INFLUENCE OF THE HETEROGENEOUS OF THE MECHANICAL CHARACTERISTICS OF THE SYSTEM “LINING–SOIL MASSIF” ON THE STRESSED STATE

Abstract

The problem of a cylindrical hole in the soil massif at a great depth, in weak flooded soils, i.e. the array was considered as an incompressible material with a Poisson’s ratio . The calculation was carried out in order to determine the influence of the function of heterogeneity of the mechanical characteristics on the stress state of the “support-soil mass” system. The problem was considered as a one-dimensional case of a plane deformed state. In this work, we considered problems for all possible combinations of the three cases of functions of Young’s support modules and four cases of elastic moduli of the soil massif . Based on the calculation results, an analysis was carried out on the basis of which the following conclusions were made: the stress state of the lining - soil mass system is practically independent of the function of the Young’s modulus of the soil , which may be due to the rather low values that the modulus of elasticity of the soil massif assumes, in comparison with the modulus of elasticity of the lining. Functions of the modulus of support affect the stress state of the lining itself and have little effect on the stress state in the soil massif. When decreasing at the hole boundary, stresses also decrease. Based on the conclusions made, it can be said that when creating inhomogeneous lining it is possible to obtain a case of an equally stressed or equal strength state of lining [1, 8], which in turn can lead to a significant economic effect.