Quality Evaluation of Slope Rock Mass after Excavation and Unloading
In a certain degree, rock mass quality deterioration after excavation and unloading would influence slope stability greatly. So it is very important to evaluate rock mass quality correctly and classify the rock mass for slope stability analysis. Based on the excavation of arch dam abutment slope of Bai Hetan power station, the rock mass quality was re-evaluated according to mechanical parameters of rock mass after excavation with the finite element method. The result shows that the RMR value of slope rock mass decreases linearly with the increase of unloading. Lastly, considering unloading as an important influencing factor, the evaluating parameters of the RMR method are revised, which is reasonable for engineering practice.
quality evaluation stability analysis unloading criterion revision
WANG Ruihong LI Jianlin JIANG Yuzhou ZHAO Erping ZHANG Yudeng
School of Water Resource and Hydropower, Wuhan University, Wuhan 430072, China;College of Civil and College of Civil and Hydropower Engineering, China Three Gorges University, Yichang 443002, China Geotechnical Research Institute of Hohai University, Nanjing 210098, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
442-447
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）