【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。更多还原

【Abstract】 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.更多还原