岩土工程勘察中十字板剪切试验的应用研究OA

To accurately determine the shear strength of soft soil in the engineering site,a cross plate shear test was conducted and compared with the results of indoor direct shear tests to analyze the application effect of the cross plate shear test.The research results showed that the maximum,minimum,and average shear strengths of soft soil in the area were 30.8 kPa,8.12 kPa,and 13.89 kPa,respectively,with a coef-ficient of variation and standard deviation of 0.789 and 4.92,respectively.Finally,12.36 kPa was obtained as the standard value of soft soil shear strength,and the shear strength index cohesion was calculated to be 8.13 kPa,and the internal friction angle was 5.5 °;The standard values of soil cohesion and internal friction angle obtained from indoor direct shear tests are 4.0 kPa and 2.4 °,respectively,which are lower than those obtained from in-situ cross plate shear plate tests.Therefore,when determining soil strength parameters in engineering investiga-tions,the cross plate shear test method with less disturbance to the soil should be prioritized.