红黏土滑坡治理工程中排水反复直接剪切试验研究

Study on repeated direct shear tests with drainage in landslide remedial project in red clay

本文依据某隧道滑坡工程在靠近滑动带上取得的红黏土原状土样,采用全自动直剪仪进行排水反复直接剪切试验确定红黏土的残余抗剪强度,并与工程实际反演得到的残余抗剪强度值进行比较,结果近似相等,由此证明:直剪仪进行排水反复直接剪切试验获取黏性土残余抗剪强度的方法,在滑坡治理工程中具有很好的应用价值。同时本文对试验过程中应该注意的事项进行了探讨,可为准确获取黏性土残余抗剪强度提供指导。

The residual shear strength of red clay is determined by direct shear test with automatic test apparatus based on the red clay samples obtained from a landslide site of a tunneling works.The test results are compared with the values of residual shear strength obtained from engineering practice,and the results are approximately equal,the method of obtaining the residual shear strength of cohesive soil by direct shear test is valuable in landslide remedial works.At the same time,the more attention that necessary to pay to obtain the accurate residual shear strength of clayey soil in the test is discussed.