人民长江2018，Vol.49Issue(6)：64-69,78,7.DOI:10.16232/j.cnki.1001-4179.2018.06.011
考虑软弱基座风化效应的望霞危岩崩塌机制分析
Collapse mechanism of Wangxia dangerous rock mass considering weathering effect of underlying soft rock
摘要
Abstract
Wangxia dangerous rock mass,at Wushan County in Three Gorges Reservoir area,consists of a soft shale founda-tion and hard upper rock mass. The shale is very weak in weathering resistance and easy to form strong weathered zone in a cer-tain depth and even concave cavities. The compression deformation of the soft foundation is the main cause inducing compression-collapse of the rock mass. In this paper,the engineering geological conditions and failure characteristics of the dangerous rock mass are analyzed,and then the influences of the weathering depth of the soft foundation on the deformation and failure process and mechanism of the rock mass are studied by the discrete element method(UDEC). It is found that the failure process of the dangerous rock mass can be well simulated by considering the weathering effect of the underlying soft rock. According to the weathered depth and the failure evolution of the dangerous rock mass,the deformation process of dangerous rock mass is divided into four stages,stability,cumulative damage,downward dislocation and break off.关键词
软弱基座/危岩/风化效应/崩塌/三峡库区Key words
soft foundation/unstable rock/weathering effect/collapse/Three Gorges Reservoir Area分类
天文与地球科学引用本文复制引用
黄达,杨伟东,陈智强..考虑软弱基座风化效应的望霞危岩崩塌机制分析[J].人民长江,2018,49(6):64-69,78,7.基金项目
国家自然科学基金面上项目(41472245,41672300) （41472245,41672300）
中央高级基本科研业务费重大项目(106112016CDJZR208804) （106112016CDJZR208804）
