Reliability analysis of slope and random response of anti-sliding pile considering spatial variability of rock mass properties

Authors

Wen-gang ZHANG, National Joint Engineering Research Center of Geohazards Prevention in the Reservoir Areas, Chongqing University, Chongqing 400045, China
Qi WANG, School of Civil Engineering, Chongqing University, Chongqing 400045, China
Fu-yong CHEN, School of Civil Engineering, Chongqing University, Chongqing 400045, China
Long-long CHEN, School of Civil Engineering, Chongqing University, Chongqing 400045, China
Lu-qi WANG, School of Civil Engineering, Chongqing University, Chongqing 400045, China
Lin WANG, School of Civil Engineering, Chongqing University, Chongqing 400045, China
Yan-mei ZHANG, College of Aerospace Engineering, Chongqing University, Chongqing 400044, ChinaFollow
Yu-qi WANG, China Railway 19th Bureau Group Sixth Engineering Co. Ltd, Wuxi, Jiangsu 214028, China
Xing ZHU, State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, China

Abstract

In the reliability analysis of slope stability, the deterministic analysis method is usually used to calculate the safety factor to evaluate the stability of slope. However, the inherent spatial variability of rock mass properties cannot be considered and described adequately in traditional deterministic method, resulting in the inaccurate calculation of slope failure probability. Based on Hoek-Brown criterion and random finite difference method (RFDM), the reliability analysis of slope stability and random response of pile are discussed in this paper considering spatial variability of rock mass. The uniaxial compressive strength σ_ci and material constant for the intact rock m_i are regarded as random field variables and geological strength index GSI is assumed to be a random variable. The results show that the spatial variability of rock mass parameters has a significant effect on slope failure probability and pile response. Ignoring the spatial variability of rock mass parameters will overestimate slope failure probability and the mean value of the maximum bending moment of anti-slide pile, and underestimate the mean value of displacement at pile head. The results can provide design guidance for slope reinforcement as well as layout optimization of anti-sliding piles.

Graphic Abstract

Recommended Citation

ZHANG, Wen-gang; WANG, Qi; CHEN, Fu-yong; CHEN, Long-long; WANG, Lu-qi; WANG, Lin; ZHANG, Yan-mei; WANG, Yu-qi; and ZHU, Xing (2022) "Reliability analysis of slope and random response of anti-sliding pile considering spatial variability of rock mass properties," Rock and Soil Mechanics: Vol. 42: Iss. 11, Article 7.
DOI: 10.16285/j.rsm.2021.5464
Available at: https://rocksoilmech.researchcommons.org/journal/vol42/iss11/7