Vol14 No.4: 771-781
【Title】A modified Hoek-Brown failure criterion considering the damage to reservoir bank slope rocks under water saturation-dehydration circulation
【Author】WANG Xin-gang1,2; WANG Jia-ding1*; GU Tian-Feng1; LIAN Bao-qin2
【Addresses】1 State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China, 2 School of Geology Engineering and Surveying, Chang' an University, Xi' an 710054, China
【Citation】Wang XG, Wang JD, Gu TF, et al. (2017) A modified Hoek-Brown strength criterion considering the damage to reservoir bank slope rocks under water saturation-dehydration circulation. Journal of Mountain Science 14(4). DOI: 10.1007/s11629-016-4206-x
【Abstract】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 WSDCcycles. Based on the curves derived from these tests, a modified Hoek-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 Hoek-Brown failure criterion is useful. Under similar WSDC-influencedengineeringand 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.
【Keywords】Modified Hoek-Brown criterion; Reservoir bank slope; Hydro-fluctuation belt; Watersaturation-dehydration circulation; Damage