拟动力地震边坡稳定性分析三维极限平衡Spencer法研究  

Three-Dimensional Limit Equilibrium Spencer Method for Stability Analysis of Quasi Dynamic Seismic Slopes

作　　者：罗贵 万愉快 梁金航 丁朋朋 董旭光 LUO Gui;WAN Yukuai;LIANG Jinhang;DING Pengpeng;DONG Xuguang(School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan,Ningxia 750021,China)

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021

出　　处：《河北工程大学学报(自然科学版)》2025年第1期58-65,共8页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：宁夏自然科学基金资助项目(2023AAC03036);国家自然科学基金资助项目(52408373,52269015);宁夏回族自治区重点研发计划项目(2021BEG03023);宁夏高等学校一流学科建设资助项目(NXYLXK2021A03)。

摘　　要：将拟动力法和极限平衡三维Spencer法相结合,推导地震力和安全系数计算公式,并编写相应的计算程序,建立考虑波动效应的三维边坡稳定性分析方法,通过算例验证了该方法和程序的正确性。使用该方法分析了几何参数、土体参数及波动效应对边坡拟动力和拟静力安全系数及对两者之间差值的影响规律。研究结果表明:安全系数随坡高、坡角、破坏面宽度的增大而减小,且拟动力安全系数始终大于拟静力安全系数,两者之间的差值随坡高的增大而增大,随坡角和破坏面宽度的增大而减小;安全系数随黏聚力和内摩擦角的增大而增大,且拟动力安全系数始终大于拟静力安全系数,两者之间的差值随黏聚力和内摩擦角的增大而增大;安全系数随地震动系数的增大而增大,且拟动力安全系数始终大于拟静力安全系数,两者之间的差值随地震动系数的增大而增大。Combining the pseudo dynamic method with the limit equilibrium three-dimensional Spencer method,the calculation formulas for seismic force and safety factor are derived,and corresponding calculation programs are written.A three-dimensional slope stability analysis method considering wave effects is established,and the correctness of the method and program is verified through numerical examples.This method was used to analyze the influence of geometric parameters,soil parameters,and wave effects on the pseudo dynamic and pseudo static safety factors of slopes,as well as the difference between the two.The research results show that the safety factor decreases with the increase of slope height,slope angle,and failure surface width,and the pseudo dynamic safety factor is always greater than the pseudo static safety factor.The difference between the two increases with the increase of slope height and decreases with the increase of slope angle and failure surface width;The safety factor increases with the increase of cohesion and internal friction angle,and the pseudo dynamic safety factor is always greater than the pseudo static safety factor.The difference between the two increases with the increase of cohesion and internal friction angle;The safety factor increases with the increase of ground vibration coefficient,and the pseudo dynamic safety factor is always greater than the pseudo static safety factor.The difference between the two increases with the increase of ground vibration coefficient.

关 键 词：边坡 稳定性 拟动力 极限平衡 Spencer法 

分 类 号：TU457[建筑科学—岩土工程]