摘要
通过现场调查分析,将危岩概括为4种失稳模式:整体滑移剪切破坏模式、块体崩滑破坏模式、整体剪切错落破坏模式、压缩-拉裂-滑移破坏模式。根据极限平衡原理,针对不同的失稳模式提出不同的稳定性计算方法和稳定状态分类指标,并对不同规模和不同稳定状态下的危岩提出相应的防治措施。
A lot of investigation shows that these unstable rock masses can be classified into four failure modes： whole slide shear failure mode;rock block landslide failure mode;whole shear fall failure mode;compress-rip-slide failure mode.Unload cracks of forming unstable rock masses failure boundary don′t store water usually;so the main loads to cause unstable rock masses failing in dam region are weight of unstable rocks,eismic load.There are two types of load combination,the first one is only weight,the second one is weight and seismic load.According to limit equilibrium theory,the authors put forward different calculation methods of stability and criterion of stability state class for different failure mode.The limit equilibrium theory not only emphasizes that correlative intensity parameters must be exact,and correctly measure geometry parameters of unstable rock massest;he latter are commonly difficult,utilizing the measuring technique of three laser scan to get these credible geometry parameters.The authors put forward corresponding measures of prevention and monitoring unstable rock masses of different scales and stability states too.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第1期175-181,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金委员会
二滩水电开发有限责任公司雅砻江水电开发联合研究基金项目(50539050)
关键词
水电工程
危岩体
稳定性
破坏模式
极限平衡原理
防治与监控措施
hydropower engineering
unstable rock masses
stability
failure mode
limit equilibrium theory
measur es of prevention and monitoring
