Methods of Obtaining Mechanics Parameters of Rock Mass Based on Hoek-Brown Criterion

ZHU Xi-xi; CHEN Cong-xin; XIA Kai-zong

doi:10.11988/ckyyb.20140215

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Journal of Changjiang River Scientific Research Institute ›› 2015, Vol. 32 ›› Issue (9) : 111-117. DOI: 10.11988/ckyyb.20140215

ROCKSOIL ENGINEERING

Methods of Obtaining Mechanics Parameters of Rock Mass Based on Hoek-Brown Criterion

ZHU Xi-xi^1,2, CHEN Cong-xin^1,2, XIA Kai-zong^1,2

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Abstract

Having elaborated the importance of study on rock mechanics parameters, we introduced the principles and methods of determining rock mechanics parameters by Hoek-Brown criterion. The mechanical parameters of soft-hard interbedded rock slope at Pengjiawan of Yichang-Badong expressway are taken as research example. On the basis of physico-mechanical parameters, rock integrity factor and wave velocity obtained from laboratory test, we reduced the physico-mechanical parameters by Hoek-Brown criterion. Comparative analysis on the results suggest that the shear strength parameters determined by linear regression analysis and non-linear fitting method are both logical; the numerical simulation result is consistent with the deformation and failure characteristics of actual rock. The results provide guidance for the determining of rock mechanics parameters in other similar projects.

Key words

rock mechanics / mechanical parameters / Hoek-Brown criterion / wave velocity of rock mass / numerical simulation

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ZHU Xi-xi, CHEN Cong-xin, XIA Kai-zong. Methods of Obtaining Mechanics Parameters of Rock Mass Based on Hoek-Brown Criterion[J]. Journal of Changjiang River Scientific Research Institute. 2015, 32(9): 111-117 https://doi.org/10.11988/ckyyb.20140215

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