岩土工程学报2025，Vol.47Issue(7)：1516-1526,11.DOI:10.11779/CJGE20240255
近断层地震动下顺倾边坡非规则坡面对抗滑桩最优位置加固效果研究
Reinforcement effects of optimal strategy of anti-slide piles on irregular slopes with bedding rock slopes under near-fault ground motions
摘要
Abstract
In practical engineering,the surfaces of bedding rock slopes are mostly irregular,and their geometrical concave and convex characteristics and joint characteristics have a significant effect on the slope stability,which leads to the problem of the optimal reinforcement strategy of using anti-slide piles to reinforce the slopes.This problem is more prominent under the near-fault pulse-like ground motions with short term and high energy.Based on this,the upper-bound limit analysis and Newmark permanent displacement method are used to establish an energy analysis model for slopes reinforced by anti-slide piles based on irregular slopes,and the accuracy of the calculated results of the improved method is verified by comparing the theoretical and numerical calculations of the destabilized areas of bedding rock slopes.The results show that:(1)The influences of geometric characteristics of slopes on their stability are more dependent on the magnitude of the partial slope angle βi,followed by the partial slope height ai.(2)The effects of βi on the slope stability become progressively larger with the increasing cohesion cr and the internal friction angle φr.The jointed surface angle has the greatest effects on the stability of the convex slope in the range of 10° to 25°.(3)The optimal reinforcement strategy of anti-slide piles are more sensitive under pulse-like ground motions than under non-pulse-like ones for irregular bedding rock slopes,and the optimal reinforcement strategy of the anti-slide pile for upward-convex and downward-concave bedding rock slope is in the upper middle(xp/xl=0.6～0.7).The optimal reinforcement strategy of the anti-slide piles for concave,convex,upward-concave and downward-convex bedding rock slopes are around in the middle(xp/xl=0.4～0.6).The research results may provide theoretical support and guidance for the optimal reinforcement strategy of the anti-slide piles for irregular bedding rock slopes under near-fault pulse-like ground motions in similar projects.关键词
非规则坡面几何特性/近断层脉冲地震动/顺倾边坡/永久位移/抗滑桩最优加固位置Key words
geometric characteristic of irregular slope/near-fault pulse-like ground motion/bedding rock slope/permanent displacement/optimal reinforcement strategy for anti-slide pile分类
建筑与水利引用本文复制引用
杨岩松,肖宇,李得建,程肖,俞强山,余鹏程..近断层地震动下顺倾边坡非规则坡面对抗滑桩最优位置加固效果研究[J].岩土工程学报,2025,47(7):1516-1526,11.基金项目
国家自然科学基金项目(52208369,52309138,52378370) （52208369,52309138,52378370）
四川省科技计划项目(2023NSFSC0284)This work was supported by the National Natural Science Foundation of China(Grant Nos.52208369 （2023NSFSC0284）
52309138 （）
52378370)and the Sichuan Science and Technology Program(Grant No.2023NSFSC0284). （Grant No.2023NSFSC0284）
