A stability analysis of rock slopes using a nonlinear strength reduction numerical manifold method. (January 2021)

• Record Type: Journal Article
• Authors: Wang, Haibin; Yang, Yongtao; Sun, Guanhua; Zheng, Hong
• Is Part Of: Computers and geotechnics. Volume 129(2021)
• Publication Date: 2021-01
• Subjects: Hoek-Brown failure criterion -- Rock slope -- Nonlinear strength reduction -- Safety factor -- Numerical manifold method (NMM); Engineering geology -- Data processing -- Periodicals; Soil mechanics -- Data processing -- Periodicals; Rock mechanics -- Data processing -- Periodicals; 624.1510285
• DOI: 10.1016/j.compgeo.2020.103864
• Languages: English
• ISSNs: 0266-352X

Abstract

Abstract: To investigate rock slope stability, a nonlinear strength-reduction numerical manifold method (NSRNMM) using a generalized Hoek-Brown (GHB) criterion is proposed. As it is difficult to implement the nonlinear strength reduction method (NSRM) with the use of the GHB criterion by directly reducing the GHB parameters, two equivalent Mohr-Coulomb (MC) criteria, namely, the instantaneous and average equivalent MC criteria that are derived from the GHB criterion, are adopted in the NSRNMM. The implementation details of the NSRNMM are discussed. The stability of two rock slopes, namely, a rock slope with a GHB material and a rock slope with a GHB material and two MC materials, is investigated using the NSRNMM. The numerical results indicate that 1) the proposed NSRNMM using the instantaneous equivalent MC criterion can accurately calculate the safety factor ( Fs ) of rock slopes and that 2) the Fs predicted with the NSRNMM using the average equivalent MC criterion is more conservative than that using the instantaneous equivalent MC criterion.