工程地质学报Issue(3)：396-404,9.DOI:10.13544/j.cnki.jeg.2014.03.007
贵州省岑巩县大榕滑坡特征及形成机制研究
CHARACTERISTIC AND MECHANISM OF DARONG LANDSLIDE IN CENGONG COUNTY,GUIZHOU PROVINCE
摘要
Abstract
A large-scale landslide disaster of about 3.1million m3 happened in Darong village of Siyang town, Cengong country on June 29,2012.Darong landslide is in the accumulation zone of ancient landslide.Based on the analysis of failure characteristics and geological prototype of landslide,the failure mode is qualitatively judged as creep sliding-fracturing-traction sliding.Under the action of unreasonable artificial filled soil in landslide promoter region and heavy rainfall,the base of slope had creep deformation and became unstable,which weakened the supporting force in the base of slope of the main slide area.Consequently,sliding and instability happened in the lower part of the main slide area,which thus induced the upper right side of the main slide to be gradually unstable. Slip zone is located in highly weathered bedrock underlying.The left side of the main body slipped to west,and the right one slipped to southwest.Based on coupled numerical analysis of stress field and seepage field,the instability process and generation mechanism of the landslide are reappeared.The study on formation mechanism of Darong landslide provides an important reference for analogous landslide analysis and identification in western mountains.关键词
大榕滑坡/古滑坡堆积体/启动区/失稳模式/耦合分析Key words
Darong landslide/Ancient landslide accumulation/Promoter region/Instability mode/Coupling analysis分类
天文与地球科学引用本文复制引用
林锋,王茜,葛海龙,曾辉,张维顺..贵州省岑巩县大榕滑坡特征及形成机制研究[J].工程地质学报,2014,(3):396-404,9.基金项目
973计划项目（2013CB733201）资助． （）
