铁道标准设计2018，Vol.62Issue(5)：1-7,7.DOI:10.13238/j.issn.1004-2954.201708090002
广义HOEK-BROWN经验准则在边坡岩体力学参数估计的应用研究
Application Research on Estimation of Slope Rockmass Mechanical Parameters Based on Generalized Hoek-Brown Criterion
摘要
Abstract
Rockmass is characterized by non-homogeneous, anisotropic and discontinuous due to the structural plane cutting action, which makes the rockmass strength different from that of the common homogeneous material. In engineering practice, the mechanical parameters of rockmass can only be estimated by in situ test or empirical formula. Tests in situ are costly and difficult to conduct in some areas,thus,it is a good choice to obtain the mechanical parameters of rockmass by empirical formula. Generalized Hoek-Brown strength criterion can well reflect the nonlinear failure characteristics of rockmass by considering many factors such as rock mass structure, rock strength and rockmass disturbance. The mechanical parameters of slope rockmass can be estimated with Hoek-Brown criterion. The generalized Hoek-Brown criterion based on the qualitative GSI system is used to estimate the strength of rock mechanical parameters in the rock slope on the exit of ji-er-mu tunnel,and the results show that the parameters obtained by this method are reasonable. The estimated results of rock mechanical parameters of the main body of the slope on the exit of ji-er-mu tunnel show that the uniaxial compressive strength is 1.5 MPa;the deformation modulus is 3 GPa; the shear strength index C=0.6 MPa and φ=32°. The generalized Hoek-Brown strength criterion is proved more convenient, timely and accurate to reflect the actual situation of rockmass in high and steep slope and has good operability in engineering.Key words: Rock slope; Generalized Hoek Brown's strength criterion; Quantitative geological strength index;Rockmass mechanical parameter关键词
岩质边坡/广义Hoek-Brown强度准则/量化GSI/岩体力学参数Key words
Rock slope/Generalized HoekBrown's strength criterion/Quantitative geological分类
交通工程引用本文复制引用
张广泽,刘伟鹏,侯伟龙,蒋良文,毛邦燕..广义HOEK-BROWN经验准则在边坡岩体力学参数估计的应用研究[J].铁道标准设计,2018,62(5):1-7,7.基金项目
中铁二院工程集团有限责任公司科研项目(院控KYY2016001(16-17)) （院控KYY2016001(16-17）
