边坡抗滑桩加固的三维有限元计算
投稿时间:2020-02-28  修订日期:2020-07-03  点此下载全文
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作者单位E-mail
张国信 甘肃省科学院地质自然灾害防治研究所 564540538@qq.com 
陈豫津 甘肃省科学院地质自然灾害防治研究所  
王谦 中国地震局甘肃省 黄土地震工程重点实验室  
钟秀梅 中国地震局甘肃省 黄土地震工程重点实验室  
周自强 甘肃省科学院地质自然灾害防治研究所 zzq0118@163.com 
刘兴荣 甘肃省科学院地质自然灾害防治研究所  
王运兴 甘肃省科学院地质自然灾害防治研究所  
基金项目:甘肃省科学院青年科技创新(2017QN-05);甘肃省科学院地质灾害防治与生态地质环境修复创新团队(CX201801);甘肃省科技计划项目(自然科学基金:18JR3RA251);陇原青年创新创业人才扶持计划项目(2018年)。
中文摘要:本文以王山村滑坡为研究对象,围绕其工程中静力抗滑稳定问题,通过室内试验对影响王山村滑坡稳定性的地质构造、场地工程条件等内在因素进行分析评价,在此基础上,利用大型商业软件ABAQUS对边坡抗滑桩加固模型进行有限元计算分析。通过对加固在边坡模型底部、中部及上部三个常见桩位稳定性系数的计算,得到了三个桩位的稳定性系数,计算结果表明:加固在模型中部桩位的安全系数最高,为1.58。为综合考虑静力作用下坡脚应力集中及动力作用下的坡顶加速度放大效应,设计了加固在边坡中点附近的上部桩位和下部桩位,并分别对其稳定性进行求解,计算结果显示两种桩位都具有较高的安全系数,分别为1.35和1.56。最后通过对模型坡面上五种桩位安全系数的对比,验证了上部桩及下部桩的可行性,可作为工程实践的参考方案。
中文关键词:抗滑桩  三维有限元方法  安全系数
 
3D finite element computations for anti-slide pile of the slope
Abstract:By taking Wangshan Village landslide as study object and centering on its static anti-sliding stability in the project, it is analyzed and evaluated in this paper the intrinsic factors, such as geological structure and site engineering conditions, which affect the stability of Wangshan Village landslide through indoor and field test. Based on this, Using the commercial software ABAQUS to computation the model of anti-slide pile of the slope. Through the calculation of the safety factor on bottom pile, middle pile and top pile of slope, the safety factors of three pile position has been obtained, the calculation results show that that the highest safety factor appeared at the position of middle pile, safety factor is 1.58. Considering the stress concentration on foot of the slope under the static loadings and the acceleration magnified effect on top of the slope under the dynamic loads, designed two positions of pile on slope around the middle pile named upper pile and lower pile, and the safety factors of two new positions were calculated, the results shows that the safety factor of two positions are higher. Finally, by comparing the safety factors of five different positions of pile on slope, testify the feasibility of upper pile and lower pile, and the results can be taken as reference to the engineering plan.
keywords:anti-slid pile  3D finite element  safety factor
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