Analysis of the physical and mechanical characteristics of the roadbed soils in the areas of reinforced concrete culverts

The article provides the analysis of the physical and mechanical characteristics of the roadbed soils in the areas of reinforced concrete culverts based on surveys conducted on one of the most important highways for the Siberian region. The physical and mechanical characteristics of the roadbed soils in the areas of reinforced concrete culverts are determined and combined into engineering and geological elements, graphs of the dependence of the soil compaction coefficient on the depth of the pit and the dynamic resistance of the soils are given, the values of the physical and mechanical characteristics of soils and the condition of the pavement in the areas of reinforced concrete culverts are compared.   It was found that in the areas of reinforced concrete culverts, when approaching the pipe, the number of defects and deformations of the pavement increases. The physical and mechanical characteristics of the roadbed soils located near the reinforced concrete culvert and at a distance of 30 m from the pipe axis differ. When moving away from the axis of the reinforced concrete culvert, the physical and mechanical characteristics of the soils improve. The conducted visual, field, laboratory studies and dynamic sensing confirm this conclusion. So, in the sinuses of culverts, the dynamic resistance of the roadbed soil is set at 3 MPa, and at a distance of 30 m from the axis of the reinforced concrete culvert 4 MPa.   The research area under consideration is relevant, since timely, accurate and rapid assessment of the physical and mechanical characteristics of the roadbed soils is necessary to reduce road accidents and rational maintenance and repair.