摘要
为了查明大山庙危岩体宏观变形破坏特征,掌握在库水波动作用下,危岩体内部岩体劣化程度及其强度变化状况,分析其变形破坏机理,对其失稳模式进行研判,在宏观调查的基础上,进行了现场声波测试,以及室内干湿循环状况下抗压强度和耐崩解性试验测试。结果表明:危岩体变形破坏特征主要为拉裂、剪切、坠落,干湿循环对危岩体有较明显的劣化作用,其完整性、强度和耐崩解性均存在明显降低趋势。大山庙危岩体变形破坏机理为在库水波动作用下产生的结构和材料连续累进性破坏过程,其最可能的失稳模式为剪切-滑移。
In order to find out the macroscopic deformation and failure characteristics of the Dashanmiao dangerous rock mass,the damage degree and strength change state of the rock mass under the fluctuation of the reservoir water level are analyzed. The deformation and failure mechanism are analyzed,and the failure mode is judged. On the basis of the macroscopic investigation,the field acoustic test was carried out,and the compressive strength and resistance to disintegration test were carried out in indoor dry and wet cycle conditions. The results show that the deformation characteristics of dangerous rock are mainly pullapart,shear and falling. Dry and wet circulation has obvious deterioration effect on dangerous rock mass. The integrity,strength and resistance to disintegration of rock mass are obviously decreasing. The deformation mechanism of Daxingmiao dangerous rock mass is the continuous progressive failure process of the structure and material under the fluctuation of reservoir water level. The most likely instability mode is shear-slip.
出处
《桂林理工大学学报》
CAS
北大核心
2017年第2期293-298,共6页
Journal of Guilin University of Technology
基金
国家自然科学基金项目(41372321)
中国地质调查局灾害预警项目(12120114079301)
中国地质调查局水工环地质调查项目(DD20160257)
关键词
库水位
危岩
变形破坏机理
材料破坏
结构破坏
reservoir water level
dangerous rock
deformation and failure mechanism
material damage
structure damage
