Abstract
The article discusses the interaction of concrete structures with the soil, made on the basis of laboratory tests and numerical simulation. The objectives of the study were to obtain the strength characteristics at the contact of two different materials, to compare the obtained value of the strength reduction factor with the standard values, and also to determine the extent to which the interface must be taken into account when conducting numerical geotechnical calculations. The study was carried out using a direct shear test device, where the strength reduction factor was obtained, which characterizes the conditions of interaction between different materials at their contact. According to the results of numerical simulation, one can see how the consideration of the given characteristics of the material of the contact element affects the internal forces arising in the underground structure and its displacements. The test results showed that the particle diameter has a different effect on shear strength at the same level of normal stress. On the basis of the results obtained, conclusions were drawn on what needs to be paid more attention to when conducting laboratory tests, how strongly the consideration of contact elements with the correct set of properties affects the internal forces of the underground structure. Also, the remaining problems and factors not considered in this study determined the prospects for further research on the topic under consideration.
Highlights
The interaction between different materials of construction and soils is an important problem in geotechnics
The determination of the ultimate shear resistance is influenced by many factors, such as soil type, particle size, soil moisture, density, relative roughness, solid surface material, normal stress
The reduction factor for the strength of Rinter is obtained by dividing the ultimate shear resistance between soil and concrete by the limit shear resistance between soil and soil
Summary
The interaction between different materials of construction and soils is an important problem in geotechnics It is widely used in solving problems associated with the calculation of retaining walls, sheet piling, lowering wells, etc. According to numerous studies, soil moisture and relative roughness have the greatest effect, implying the ratio of the roughness of a solid surface along the shear length to the average diameter of the soil particles. This topic has been studied in a number of other works, including foreign ones, for example, Liming Hu and Jialiu Pu (2004) [1] have carried out shear tests on a steel plate with its various roughness. Two types of fracture were shown, depending on the relative roughness, and the thickness of the soil shear zone was visually determined
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