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滑坡滑带土试验是确定滑坡物理力学参数的主要方法之一,是研究滑坡成因机理的基础,但由于人为和试验仪器本身等方面的原因,导致滑坡滑带土试验成果失真,因此非常有必要对滑坡滑带土试验成果进行检验。本文采用室内试验对三峡库区某滑坡滑带土的含水率、液塑限、颗粒级配、自由膨胀率进行了研究,在此基础上结合滑坡实际情况,运用反复剪切试验重点对滑带土的残余强度参数进行了探讨,最后采用区域统计规律对试验成果进行了检验。研究结果表明:该滑坡滑带土为级配良好的粘土,其天然含水率为31.21%,且该滑带为弱膨胀性土;滑带土达到残余强度的剪切位移与垂直压力成正比;该滑坡滑带土的饱和残余强度为:c=0.29 kPa,φ=7.45°。
Landslide slide soil test is one of the main methods to determine the physical and mechanical parameters of landslide. It is the basis for studying the mechanism of landslide. However, it is very necessary to make the landslide slide soil test results distorted because of man-made and test equipment itself Test landslide slippery soil test results. In this paper, the water content, liquid-plastic limit, particle size distribution and free expansion of a landslide in the Three Gorges Reservoir Area were studied by laboratory experiments. Based on the actual situation of the landslide and the repeated shear tests, Soil residual strength parameters were discussed, and finally the regional statistical laws were used to test the test results. The results show that the landslide is a well-graded clay with a natural water content of 31.21% and the sliding zone is weakly expansive soil. The shear displacement of the landslide soil reaching the residual strength is proportional to the vertical pressure. The saturated residual strength of landslide zone soil is: c = 0.29 kPa, φ = 7.45 °.