Determination of the interface parameters on the contact of concrete and soil by different methods

• Published in: IOP conference series. Materials Science and Engineering 2019-12, Vol.698 (2), p.22071
• Main Authors: Ter-Martirosyan, A Z, Sidorov, V, Almakaeva, A
• Format: Article
• Language: English
• Subjects: Massifs; Parameters; Shear strength; Shear stress; Soft clay; Soils; Underground structures
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/698/2/022071

The article presents a comparison of tests carried out on torsional and direct shear devices, in order to determine the strength reduction factor on its contact arising between the soil massif and the underground structure. It is necessary to understand which device makes it possible to determine the strength characteristics that are closest to real cases. For the experiments, soft clay and concrete samples were used. The tests were carried out at a vertical pressure of 100 kPa with speeds of 0,005 mm/min and 0,01196 °/min. According to the obtained results, it was concluded that the values of the shear stresses on the torsional shear device are higher than on the direct shear device. This is due to the fact that the contact area is not constant during the test, respectively, the shear resistance decreases. In a number of other works, the differences in the results are attributed to the fact that the mechanisms of collapse differs depending on the type of device. Therefore, it is necessary to study more detailed the conditions of shear and the process of specimen collapse in all devices, which allow one to determine the strength parameters in order to understand which of them gives more correct results.