EVALUATION OF EXPECTED VALUES OF ELASTIC MODULES OF CLAY SOILS AT CONSTRUCTION OF THE SUBGRADE OF AUTOMOBILE ROADS
Abstract
This article continues to consider the proposal to borrow the requirements for the strength of the subgrade, established in the catalog of typical road pavements of Germany, for the design of pavements in Russia. It is shown that it is impossible to fulfill foreign requirements for the minimum value of the deformation modulus on the subgrade surface when using the calculated values of the soil elasticity moduli used to calculate pavement. The approximate permissible boundary values of the optimum moisture content of clay soils in fractions of the yield strength have been analytically determined. The assessment of normative tolerances for the optimum moisture content of clay soils and the expected modulus of elasticity of soils, which can be provided during the construction of the subgrade, using domestic guidelines for the design of road pavements. It is shown that a more objective indicator of the quality control of compaction of the subgrade is not the mechanical characteristics of soils, for example, the deformation modulus or elastic modulus, but the standard compaction coefficient currently used in Russia
References
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