Pseudo-dynamic viscoelastic stability analysis of anti-dip bedding rock slopes  

作　　者：Shixin Zhang Yufeng Wei Yanling Liu Chunyu Chen Hao Yang Xin Zhang Peng Liang 

机构地区：[1]State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu,610059,China [2]College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu,610059,China [3]PowerChina Northwest Engineering Corporation Limited,Xi'an,710000,China

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2025年第3期1631-1645,共15页岩石力学与岩土工程学报(英文)

基　　金：funding support from the National Natural Science Foundation of China(Grant No.42072303);the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project(Grant No.SKLGP2021Z004).

摘　　要：Earthquakes contribute to the failure of anti-dip bedding rock slopes(ABRSs)in seismically active regions.The pseudo-static method is commonly employed to assess the ABRSs stability.However,simplifying seismic effects as static loads often underestimates rock slope stability.The development of a practical stability analysis approach for ABRSs,particularly in slope engineering design,is imperative.This study proposes a stability evaluation model for ABRSs,incorporating the viscoelastic properties of rock,to quantitatively assess the safety factor and failure surface under seismic conditions.The mathematical description of the pseudo-dynamic method,derived in this study,accounts for the viscoelastic properties of ABRSs and integrates the HoekeBrown failure criterion with the Kelvin-Voigt stress-strain relationship of rocks.Furthermore,to address concurrent translation-rotation failure in ABRSs,upper bound limit analysis is utilized to quantify the safety factor.Through a comparison with existing literature,the proposed method considers the effect of harmonic vibration on the stability of ABRSs.The obtained safety factor is lower than that of the quasi-static method,with the resulting percentage change exceeding 5%.The critical failure surface demonstrates superior positional accuracy compared to the Aydan and Adhikary basal planes,with minimal error observed between the physical model test and the numerical simulation test.The parameter sensitivity analysis reveals that the inclination of ABRSs exhibits the highest sensitivity(Sk)value across the three levels of horizontal seismic coefficient(kh).The study aims to devise an expeditious calculation approach for assessing the stability of ABRSs during seismic events,intending to offer theoretical guidance for their stability analysis.

关 键 词：Anti-dip bedding rock slope Viscoelastic properties Pseudo-dynamic method Upper bound limit analysis Kelvin-voigt model 

分 类 号：P31[天文地球—固体地球物理学]