GIS支持下降雨滑坡的启动机制研究与数字仿真

GIS-AIDED STUDY AND NUMERICAL SIMULATION OF INITIATION MECHANISM OF LANDSLIDE DUE TO PRECIPITATION

摘要: 大气降雨对滑坡体的含水量和容重均有影响, 该影响具有一定的时间进程, 同时滑坡滑带土的含水率对内摩擦角和内聚力均有一定的影响。本文提出了滑坡启动的两种不同机制。通过降水滑体含水率滑体容重、滑带土内摩擦角、内聚力以及它们与滑坡稳定系数的定量关系及其时间效应, 建立起滑坡启动的速度、推力、方向和启动时间的预测、预报模型。

Abstract: In this paper the influence of atmospheric precipitation on moisture content and volume weight landslide body and hence the influence moisture content in soil on internal friction angle and cohesive force are discussed. Based on these influences, two different initiation mechanisms for landslide are presented. The models for forecasting initial velocity, pushing force, direction, and time of initiation are established based on these relationships involving factors of precipitation moisture content volume weight and internal friction angle cohesive force stability. At the same time, numerical simulation of landslide initiation mechanisms is accomplished by GIS.