岩土力学Issue(12)：3587-3593,7.
牵引式滑坡的破坏机制及其加固措施探讨--以某高速公路牵引式滑坡为例
Discussion on failure mechanism of retrogressive landslide and its reinforcement measures:taking a certain expressway retrogressive landslide for example
摘要
Abstract
The retrogressive landslide occupies a considerable proportion among expressway landslides in the mountain area. The reinforcement projects often cost enormously and the environment around is usually damaged severely. Taking a certain expressway retrogressive landslide for example, through approaches of geological survey, deformation investigation, stress-strain behavior analysis and numerical modeling, the failure mechanism is confirmed as follows:(1) the loss of resisting key block is caused by slope foot excavation, shear strain softening is induced by stress concentration;(2) physico-mechanical properties alternation of the rock and soil mass are remolded by the surface rainfall and groundwater;(3) tensile cracks are fromed deformation incompatibility and its expanding backward. The monitoring results show that the applied combined reinforcement measures work well. The geological characteristics of excavation-induced retrogressive landslides are discussed. A principle that“the safety factor should be calculated by section should use to evaluate retrogressive landslide; the reinforcement of the whole landslide should be controlled by the predetermined safety factor;while the reinforcement of landslide rear should be controlled by displacement.关键词
牵引式滑坡/滑坡范围/加固措施/位移控制Key words
retrogressive landslide/landslide boundary/reinforcement measures/displacement control分类
交通工程引用本文复制引用
宋东日,任伟中,沈波,徐志忠,周英博,张思渊..牵引式滑坡的破坏机制及其加固措施探讨--以某高速公路牵引式滑坡为例[J].岩土力学,2013,(12):3587-3593,7.基金项目
中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室重点项目（No. SKL208064）；中国科学院知识创新工程重要方向项目（No. KZCXZ-YW-151）。 （）
