title: Slope stability analysis using limit equilibrium method in nonlinear criterion.
abstract: In slope stability analysis, the limit equilibrium method is usually used to calculate the safety factor of slope based on Mohr-Coulomb criterion. However, Mohr-Coulomb criterion is restricted to the description of rock mass. To overcome its shortcomings, this paper combined Hoek-Brown criterion and limit equilibrium method and proposed an equation for calculating the safety factor of slope with limit equilibrium method in Hoek-Brown criterion through equivalent cohesive strength and the friction angle. Moreover, this paper investigates the impact of Hoek-Brown parameters on the safety factor of slope, which reveals that there is linear relation between equivalent cohesive strength and weakening factor D. However, there are nonlinear relations between equivalent cohesive strength and Geological Strength Index (GSI), the uniaxial compressive strength of intact rock σ ci , and the parameter of intact rock m i . There is nonlinear relation between the friction angle and all Hoek-Brown parameters. With the increase of D, the safety factor of slope F decreases linearly; with the increase of GSI, F increases nonlinearly; when σ ci is relatively small, the relation between F and σ ci is nonlinear, but when σ ci is relatively large, the relation is linear; with the increase of m i , F decreases first and then increases.
authors.affiliation: Changjiang River Scientific Research Institute, Wuhan, Hubei 430010, China ; School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, China ; Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, China.
authors.forename: Hang
authors.initials: H
authors.lastname: Lin
authors.affiliation: School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, China.
authors.forename: Wenwen
authors.initials: W
authors.lastname: Zhong
authors.affiliation: School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xiong
authors.affiliation: School of Resources and Safety Engineering, Central South University, Changsha, Hunan 410083, China.
authors.forename: Wenyu
authors.initials: W
authors.lastname: Tang