滑坡体积和地形地貌是影响滑坡滑动距离的两个重要因素。在对"5·12"汶川地震诱发的滑坡进行详细调查的基础上,对46个典型地震滑坡的滑动距离与滑坡体积以及原始斜坡坡角的相关关系进行了统计分析。结果表明,汶川地震滑坡的水平滑动距离、垂直滑动距离均与滑坡体积的对数值具有良好的指数函数增长关系,相关系数R2分别为0.8244和0.7859;等效摩擦系数与原斜坡坡角正切值之间具有良好的线性增长趋势,相关系数R2为0.7973。基于此,通过二元线性回归,获得了滑坡水平滑动距离与滑坡体积、滑坡前后缘高差以及原始斜坡坡角的相关关系。

Volume and topography are two important factors affecting runout distance of landslides.On the basis of detailed field investigation of the landslides triggered by"5·12 "Wenchuan earthquake,the relationships between runout distance and landslide volume and initial slope angle for 46 typical earthquake-induced landslides were analyzed.The results showed that there are good exponential relationships between the logarithmic values of displaced volume and horizontal and vertical distances for the landslides,and the R2 values are 0.8244 and 0.7859 respectively.Moreover,there is an good linear relationship between the equivalent friction coefficient and tangent values of initial slope angle for the landslides,and the R2 values is 0.7973.In addition,a relation of horizontal(Lr) and vertical distance(H),landslide volume(V) and initial slope angle(θ) for the landslides was obtained by binary linear regression.