基于单根锚杆失效的边坡稳定性可靠度分析  

Slope stability reliability analysis based on single bolt failure

作　　者：丁盛环 DING Shenghuan(College of Civil Engineering,Lanzhou University of Information Science and Technology,Lanzhou 730300,China)

机构地区：[1]兰州信息科技学院土木工程学院,甘肃兰州730300

出　　处：《四川建材》2024年第12期105-106,112,共3页Sichuan Building Materials

基　　金：甘肃省高校教师创新基金(2024B-424)。

摘　　要：锚杆作为支护结构重要的一部分,单根锚杆失效会对边坡稳定性产生不利影响,为了弥补传统确定性计算方法的不足,将土体物理参数视为随机变量,基于可靠度理论进行边坡稳定性计算。将方法应用于工程实例,计算存在单根锚杆失效下的边坡整体稳定性可靠指标,最后采用有限元软件GeoStudio对该工程实例进行稳定性可靠度模拟分析,并将两种方法进行对比分析,结果表明:靠近坡脚位置处的锚杆失效对边坡稳定性影响最大。理论计算值与数值模拟结果吻合较好,所提的方法对框架锚杆锚固边坡的稳定性计算具有一定的有效性。As an important part of the supporting structure,the failure of a single bolt will have an adverse effect on the stability of the slope,in order to make up for the shortcomings of the traditional deterministic calculation method,the physical parameters of the soil are regarded as random variables,and the slope stability is calculated based on the reliability theory.The method is applied to the engineering example to calculate the overall stability and reliability index of the slope under the failure of a single bolt.Finally,the finite element software GeoStudio is used to simulate and analyze the stability and reliability of the engineering example,and the two methods are compared and analyzed,and the results show that the failure of the anchor near the slope foot has the greatest impact on the stability of the slope.The theoretical calculated values are in good agreement with the numerical simulation results,and the proposed method has certain effectiveness in calculating the stability of frame anchor anchored slopes.

关 键 词：框架锚杆 单锚失效 可靠度 边坡稳定性 

分 类 号：U416.14[交通运输工程—道路与铁道工程]