降雨型滑坡抗剪强度参数反演研究

Study on the inversion of shear strength parameters of rainfall-type landslide

以三峡库区树坪滑坡为例,在综合分析降雨型滑坡位移变化特征与降雨量动力因素关系的基础上,根据灰色关联理论,提出了一种确定边坡抗剪强度参数的综合反演测定计算方法。该方法克服了传统测定方法试验样本数量偏少,以少量样本试验结果代替边坡整体抗剪强度参数取值及试验成本高的局限性,且操作步骤易于实施,计算成本相较于其他测定方法低。通过计算可以获得边坡的抗剪强度参数的取值,此计算结果更能代表边坡整体参数取值,并验证了该方法对降雨型滑坡抗剪强度参数的真实性与可行性。

Taking the Shuping landslide in the Three Gorges Reservoir area as an example,and based on the comprehensive analysis of the relationship between the displacement variation characteristics of rainfall-type landslide and the dynamic factors of rainfall,this study proposes a comprehensive inversion measurement and calculation method for determining the shear strength parameters of the slope according to the grey correlation theory.The proposed method overcomes some limitations of traditional measuring method,including that the test sample quantity is small,the test result of a small sample size replaces the whole slope shear strength parameter selection,and the test cost is high.In addition,the steps of the new method are easy to handle,and the computation cost is low compared with other methods.The value of slope shear strength parameters can be obtained through calculation and the calculation results are more representative of the whole slope parameter selection.The authenticity and feasibility of this method in selecting rainfall-type landslide shear strength parameters is verified.