摘要
以上饶地区典型黏土质边坡为研究实例,利用ANSYS软件设计了3种模型分析在不同切坡角度和含水率条件下边坡稳定性。结果表明:(1)边坡在30°坡角,含水率28.54%状态下,安全系数为1.188 4,处于稳定状态(边坡失稳临界平衡安全系数为1.0),在自重作用下不易发生失稳滑移;(2)当边坡发生切坡作用时,边坡安全系数随切坡角度发生改变,当角度达到44°时,边坡处于失稳临界状态,大于这个临界角度,易发生失稳滑移;(3)受降雨影响,随着含水率不断增加,边坡安全系数呈降低状态,当坡角低于40°,含水率不高于31.5%时,边坡整体处于稳定状态;当坡角达45°及以上,含水率大于28.54%时,边坡失稳,而坡度为50°时,含水率只需超过23.6%,边坡便失稳滑移。
Using ANSYS software,taking the typical clay slope in Shangrao area as an example,three models are designed to analyze the stability of clay slope under different cutting angles and different water content conditions.The results show that:(1)When the slope angle is 30°and the water content is 28.54%,the safety factor of this clay slope is 1.1884,which is higher than the safety factor 1.0 of the critical equilibrium state of slope instability.This slope is in a stable state and no instability slip will occur under the action of self-weight;(2)When slope cutting occurs,the safety factor of this slope will change with the angle of slope cutting.When the angle of slope cutting reaches 44°,the slope is in a critical state of instability.If the angle of slope cutting is larger than this critical angle 44°,it is easy to have instability slip;(3)With the increasing water content of the clay slope,the safety factor of the slope decreases.When the slope angle is lower than 40°and the soil moisture content is less than 31.5%,the slope will be in a stable state.When the slope is 45°,the slope will become unstable when the water content is greater than 28.54%;while after 50°,the slope will slip only when the water content exceeds 23.6%.
作者
陈振平
毕晨洁
吴珍云
石祖峰
李希星
欧阳海金
CHEN Zhenping;BI Chenjie;WU Zhenyun;SHI Zufeng;LI Xixing;OUYANG Haijin(School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China;School of Earth Sciences,East China University of Technology,Nanchang 330013,China;Engineering Research Center for Seismic Disaster Prevention and Engineering Geological Disaster Detection of Jiangxi Province,East China University of Technology,Nanchang 330013,China;Eighth Geological Team of Jiangxi Geological Bureau,Shangrao 334000,Jiangxi,China;Geophysical&Geochemical Exploration Brigade of Jiangxi,Nanchang 330025,China)
出处
《实验室研究与探索》
CAS
北大核心
2023年第10期47-51,147,共6页
Research and Exploration In Laboratory
基金
江西省防震减灾与工程地质灾害探测工程研究中心开放基金项目(SDGD202108)
江西省教育厅科学技术研究项目(GJJ210702,GJJ200718)
江西省大气污染成因与控制重点实验室开放基金项目(AE2108)
东华理工大学博士启动基金项目(DHBK2019053)。
关键词
黏土质边坡
含水率
有限元模拟
边坡稳定性
clay slope
water content
finite element simulation
stability of slope