摘要
结合陕西某煤矿黄土高边坡工程实例,在地质调查和试验分析基础上,采用强度折减法和非线性动力分析法,对天然工况和地震工况下的黄土高边坡稳定性进行数值模拟分析研究,得出以下主要结论:采用有限差分法(FLAC 3D)和有限元法(GTS)分析计算的边坡稳定系数基本吻合,潜在滑移面基本一致;数值模拟分析显示,地震作用下,黄土高边坡坡体应力和应变值均有提高,特别是坡脚处应力、应变变化显著,研究表明边坡应力、应变值随着地震动峰值加速度的增大、边坡坡度的增大,变化明显;非线性动力法能够更加直观地通过观测点的加速度、速度、位移曲线来判断黄土高边坡的稳定性。通过采用不同数值模拟方法对黄土高边坡稳定性进行分析,可为黄土高边坡优化设计提供参考依据。
Based on geological investigation and experimental analysis,the strength reduction method and nonlinear dynamic analysis method were used to conduct numerical simulation analysis on the stability of loess high slopes under natural and seismic conditions,taking into account an example of a coal mine loess high slope project in Shaanxi.The main conclusions are as follows:the slope stability coefficients calculated using the finite difference method(FLAC 3D)and finite element method(GTS)are basically consistent,the potential slip surface is basically consistent.Numerical simulation analysis shows that under earthquake action,the stress and strain values of the loess high slope increase,especially at the foot of the slope,with significant changes in stress and strain.Research has shown that the stress and strain values of the slope change significantly with the increase of peak seismic acceleration and slope.The nonlinear dynamic method can more intuitively judge the stability of loess high slopes through the acceleration,velocity,and displacement curves of observation points.By using different numerical simulation methods to analyze the stability of loess high slopes,reference basis can be provided for the optimization design of loess high slopes.
作者
柴卓
吴彪
张海锋
谢春燕
Chai Zhuo;Wu Biao;Zhang Haifeng;Xie Chunyan(Shaanxi Branch of China National Geological Exploration Center of Building Materials Industry,Xi’an Shaanxi 710003,China;Shaanxi Zhongxiang Foundation Engineering Co.,Ltd.,Xi’an Shaanxi 710003,China)
出处
《山西建筑》
2024年第7期70-73,共4页
Shanxi Architecture
关键词
边坡稳定性
数值模拟
强度折减法
非线性动力分析法
slope stability
numerical simulation
strength reduction method
nonlinear dynamic analysis method
