A modified Hoek-Brown failure criterion considering the damage to reservoir bank slope rocks under water saturation-dehydration circulation  

作　　者：WANG Xin-gang WANG Jia-ding GU Tian-Feng LIAN Bao-qin 

机构地区：[1]State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University [2]School of Geology Engineering and Surveying, Chang' an University

出　　处：《Journal of Mountain Science》2017年第4期771-781,共11页山地科学学报（英文）

基　　金：supported by the National Natural Science Foundation of China under No. 41630639;the National Basic Research Program of China (2014CB744703);Natural Science Basic Research Plan in Shaanxi Province of China (No. 2016JQ4014);China Postdoctoral Science Foundation (2016M602743)

摘　　要：After water is impounded in a reservoir, rock mass in the hydro-fluctuation belt of the reservoir bank slope is subject to water saturation- dehydration circulation （WSDC）. To quantify the rate of change of rock mechanical properties, samples from the Longtan dam area were measured with uniaxial compression tests after different numbers （1, 5, 10, 15, and 20） of simulated WSDC cycles. Based on the curves derived from these tests, a modified Hock- Brown failure criterion was proposed, in which a new parameter was introduced to model the cumulative damage to rocks after WSDC. A case of an engineering application was analyzed, and the results showed that the modified Hock-Brown failure criterion is useful. Under similar WSDC-influenced engineering and geological conditions, rock mass strength parameters required for analysis and evaluation of rock slope stability can be estimated according to this modified Hoek-Brown failure criterion.

关 键 词：Modified Hoek-Brown criterion Reservoir bank slope Hydro-fluctuation belt Water saturation-dehydration circulation DAMAGE 

分 类 号：TV697.23[水利工程—水利水电工程]