地震荷载作用下炭质页岩边坡稳定性分析  

Stability Analysis of Carbonaceous Shale Slope Under Seismic Load

作　　者：杜宇 Du Yu(Jiangsu Geological Engineering Co.,LTD.,Nanjing 210000,China)

机构地区：[1]江苏省地质工程有限公司,南京210000

出　　处：《黑龙江科学》2025年第4期36-41,共6页Heilongjiang Science

摘　　要：对炭质页岩边坡在地震载荷作用下的稳定性问题进行分析。以四川南江县-通江县公路工程中的一段炭质页岩边坡为例,利用ANSYS有限元分析软件,建立炭质页岩边坡的动态分析模型,对边坡的边界条件、固有频率进行适当的设置,采用地震作用下的反应谱及地震波的输入对边坡的动力响应进行数值计算。结果显示,边坡位移、速度、加速度随地震波振幅的增大而增大,位移的峰值位于边坡的底部。对边坡在地震作用下的应力特征进行研究,讨论了边坡的安全系数与边坡的坡度、高度等因素的关系。结果表明,随着坡比和高度的增大,边坡的安全系数减小,从而影响边坡的稳定性。此研究成果可为炭质页岩边坡的稳定评价和防灾减灾工作提供一定的理论基础和技术支撑,为相关设计、施工提供参考。The study analyzes the stability of carbonaceous shale slope under seismic load.Through taking a section of carboniferous shale slope in Nanjiang County,Sichuan Province as an example,the study establishes a dynamic analysis model of the carboniferous shale slope by using ANSYS finite element analysis software,appropriately sets the boundary conditions and natural frequencies of the slope,and calculates the dynamic response of the slope by using the response spectrum and seismic wave input under earthquake action.The results show the slope displacement,velocity and acceleration increase with the increase of seismic amplitude,and the peak value of displacement is located at the bottom of the slope.The study analyzes the stress characteristics of slope under earthquake,and discusses the relationship between the safety factor of slope and the slope,and height,etc.The results show with the increase of slope ratio and height,the safety factor of slope decreases,which affects the stability of slope.The research results can provide theoretical basis and technical support for the stability evaluation,and disaster prevention and reduction of carboniferous shale slope;and provide reference for related design and construction.

关 键 词：地震荷载 炭质页岩边坡 稳定性分析 

分 类 号：TU457[建筑科学—岩土工程]