不同地震加速度影响下边坡安全性数值模拟  

Numerical simulation of slope safety under different seismic accelerations

作　　者：张舶航 史冠宇 张蕾 ZHANG Bohang;SHI Guanyu;ZHANG Lei(Jiangsu Province Engineering Investigation and Research Institute Co.,Ltd.,Yangzhou 225001,China)

机构地区：[1]江苏省工程勘测研究院有限责任公司,江苏扬州225001

出　　处：《江苏水利》2024年第8期12-16,共5页Jiangsu Water Resources

摘　　要：为了掌握不同峰值地震加速度作用下黄土边坡的稳定性响应机理,以某典型斜坡为对象,采用geo-studio软件研究了该边坡在不同峰值加速度波形作用下的稳定性,得出以下结论:边坡稳定性受地震影响显著,当地震加速度从0.05 g增长至0.4 g,滑移面处的变形从1.52 m上升至12.19 m,安全系数从1.082下降至0.964;动荷载的增加使得边坡内部剪应力增大,裂缝不断扩张,同时受地下水位的影响,孔隙水压力不断增长,最终边坡稳定性逐渐下降,滑移风险不断提高。In order to understand the stability response mechanism of loess slopes under different peak seismic accelerations,this paper takes a typical slope as the object and uses geo-studio software to study the stability of the slope under different peak acceleration waveforms.The following conclusions are drawn:slope stability is significantly affected by earthquakes.When the seismic acceleration increases from 0.05 g to 0.4 g,the deformation at the sliding surface increases from 1.52 meters to 12.19 meters,and the safety factor decreases from 1.082 to 0.964;The increase in dynamic load leads to an increase in shear stress inside the slope,continuous expansion of cracks,and an increase in pore water pressure due to the influence of groundwater level.Ultimately,the stability of the slope gradually decreases and the risk of sliding increases.

关 键 词：峰值地震加速度 边坡稳定性 变形稳定 数值模拟 

分 类 号：TV222[水利工程—水工结构工程]