摘要
针对某高山峡谷地区的沟谷型弃渣场边坡稳定性问题,借助FLAC^(3D)数值模拟软件对边坡在天然、暴雨、地震3种工况下的稳定性进行了数值模拟;引入蒙特卡罗法对弃渣场暴雨+地震工况下的稳定性可靠度进行评价。结果表明:天然、暴雨、地震3种工况下弃渣场边坡整体和局部均处于稳定状态;弃渣场整体安全系数呈正态分布,整体安全系数集中在2.0~2.1,与数值模拟结果(2.08)一致;在暴雨+地震工况下,弃渣场整体处于不稳定状态的概率为0,局部处于不稳定状态的概率为35.99%。数值模拟与现场监测对比分析结果表明,两者的偏差为9.8%~15.4%。
In order to address the problem of slope stability for a valley dumpsite in one mountain area,numerical simulation was conducted with FLAC^(3D) for the stability of slope under three working conditions,including natural state,rainstorm case and earthquake occurrence.The stability and reliability of the dump under conditions of rainstorm plus seismic was evaluated with introduced Monte Carlo algorithm.Results show that the overall and part of dumpsite slope,under all three working conditions of natural state,rainstorm and earthquake,can be in a stable state,and the overall safety factors present a normal distribution and are mainly within the range of 2.0-2.1,consistent with the numerical simulation results(2.08);under conditions of rainstorm plus seismic,the probability for the overall dumpsite to be unstable is 0,while some parts of dumpsite have a 35.99%probability to be unstable.It is shown that the numerical simulation value and on-site monitoring result present a deviation from 9.8%to 15.4%based on the comparison.
作者
张林
ZHANG Lin(The 5th Engineering Co.,Ltd.,China Railway Construction Bridge Engineering Bureau Group,Chengdu 610500,Sichuan,China)
出处
《矿冶工程》
CAS
北大核心
2024年第5期35-40,共6页
Mining and Metallurgical Engineering
基金
四川省自然科学基金(2022NSFSC1063)。
关键词
弃渣场
边坡稳定性
数值模拟
安全系数
可靠度
蒙特卡罗法
dumpsite
slope stability
numerical simulation
safety factor
reliability analysis
Monte Carlo method
作者简介
张林(1982-),男,四川南充人,高级工程师,主要研究铁路、公路、桥梁及地下工程建设。E-mail:83458777@qq.com。
