溪洛渡水电工程坝区高边坡危岩体分类及稳定性评价  

Quality classification and stability evaluation of unstable rock mass on high rock slope of Xiluodu Hydropower Project

作　　者：刘卫华[1] 罗倩[2] 黄润秋[3] 裴向军[3] 张伟锋[3] 

机构地区：[1]中国中铁二局集团有限公司,四川成都610032 [2]西南石油大学外语系,四川南充637001 [3]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《水利水电科技进展》2008年第4期48-51,共4页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金雅砻江水电开发联合研究基金(50539050)

摘　　要：针对溪洛渡水电工程坝区高边坡危岩体分布广泛,对建筑物、大坝以及整个发电系统存在极大的潜在威胁等问题,在现场调查的基础上,将危岩体分为孤立式、悬挂式、贴坡式、软弱基座式和碎裂结构式等5种类型,指出每一种类型分别对应不同的失稳模式。在充分揭示危岩体边界条件、形成机制以及失稳方式的基础上,提出了危岩体稳定性、危险性分级和系统评价方法,为高边坡地质灾害防治提供了依据。Potential unstable rock masses are widely distributed on the high rock slope of the Xiluodu hydropower project on the Jinsha River, and they pose a great potential risk to construction, operation of the dam and the entire power station system. On the basis of field investigation, the potential unstable rock masses can be classified into five types, the isolated unstable rock mass, the over-hang unstable rock mass, the conjoint unstable rock mass, the unstable rock mass with a soft foundation and the cataclastic unstable rock mass, with every type corresponding to a different failure pattern. The boundary conditions, failure patterns and mechanisms for formation of potentially unstable rock masses have been described, and the stability evaluation system and risk grading method for potential unstable rock masses are herein proposed and established. The study in this paper can provide a basis for gcohazards prevention on high rock slopes.

关 键 词：危岩体 形成机制 稳定性评价 危险性评价 边坡处理 溪洛渡水电工程 

分 类 号：TV223.3[水利工程—水工结构工程]