地震作用下框架锚杆加固黄土边坡稳定性及可靠度分析  

Stability and reliability analysis of loess slope strengthened by frame anchor in earthquake

作　　者：叶帅华[1,2] 曾浩 时轶磊 陶晖 YE Shuai-hua;ZENG Hao;SHI Yi-lei;TAO Hui(Key Laboratory of Disaster Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;Gansu CSCEC Municipal Engineering Investigation and Design Institute Co.,Ltd.,Lanzhou 730000,Gansu,China;Gansu Vocational College of Architecture,Lanzhou 730050,Gansu,China)

机构地区：[1]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [3]甘肃中建市政工程勘察设计研究院有限公司,甘肃兰州730000 [4]甘肃建筑职业技术学院,甘肃兰州730050

出　　处：《地基处理》2023年第3期228-237,共10页Journal of Ground Improvement

基　　金：国家自然科学基金(51768040,51508256)。

摘　　要：为了研究框架锚杆加固黄土边坡在地震作用下不同参数对边坡稳定性及可靠度的影响,依托边坡工程实例,借助Geo-Studio有限元软件,建立加固边坡计算模型,采用Monte Carlo法分析了土体参数(内摩擦角、黏聚力)和地震峰值加速度的随机性对框架锚杆加固黄土边坡稳定性及可靠度的影响。研究表明,随着地震峰值加速度的增大,边坡的稳定性逐渐降低;地震峰值加速度的随机性对边坡的稳定性及可靠度的影响最为明显,其次为内摩擦角。为了保证边坡有足够的稳定性和可靠度,应尽可能多地考虑参数的随机性,其中需特别注意地震峰值加速度和内摩擦角的影响。The influence of different parameters on the stability and reliability of the loess slope reinforced by frame anchors under the action of earthquake is studied.Relying on the slope engineering example,the calculation model of the reinforced slope is established by Geo-Studio finite element software.The effects of randomness and variability of parameters on the stability and reliability of loess slopes strengthened by frame anchors are analyzed by Monte Carlo method.The results show that with the increase of seismic peak acceleration,the stability of slope decreases gradually.The randomness of seismic peak acceleration has the greatest influence on the reliability of slope stability,followed by the angle of internal friction.In order to ensure enough stability and reliability of the slope,the randomness of parameters should be considered as much as possible.Special attention should be paid to the influence of seismic peak acceleration and internal friction angle.

关 键 词：稳定性 可靠度 黄土边坡 框架锚杆 安全系数 地震作用 

分 类 号：TU43[建筑科学—岩土工程]