基于改进条分法的滑坡稳定性分析
Landslide Stability Analysis Based on Improved Slice Method
江俊杰 1刘东泽 2卢应发 1吴京戎 3何英东1
作者信息
- 1. 湖北工业大学 土木建筑与环境学院,湖北 武汉 430068
- 2. 中冶武勘工程技术有限公司,湖北 武汉 430080
- 3. 湖北工业大学 土木建筑与环境学院,湖北 武汉 430068;湖北工业大学 工程技术学院,湖北 武汉 430068
- 折叠
摘要
为了研究边坡渐进破坏过程及稳定性演化规律,在传统条分法基础上引入两种土体本构模型,将变形与受力结合建立新型条分法,并提出一种新型边坡稳定性分析方法,从滑面点、滑面和滑体进行多维度描述,有效地展现滑坡渐进破坏过程.对卡子湾滑坡进行实例分析,结果表明:用传统稳定性方法计算的稳定系数为 1.065 9,即滑坡为欠稳定状态,结合滑坡的点面体评价指标分析,滑坡在临界状态前移过程中,条分法计算的第 29 条块出现突变,证明滑坡在临界状态点移动至第 29 条块后可能会突然发生整体破坏,并且将理想弹塑性模型与剪应力模型的计算结果进行对比分析,得到基于剪应力本构模型的条分法更加接近滑坡受力情况,此类方法可以为滑坡的监测预警提供参考.
Abstract
In order to study the progressive failure process and stability evolution law of slope,two soil constitutive models were introduced on the basis of the traditional strip method,and a new strip method was established by combining deformation and force,and a new slope stabili-ty analysis method was proposed,which was described from the sliding surface point,sliding surface and sliding body in multiple dimen-sions,so as to effectively show the gradual failure process of landslide.The results show that the stability coefficient is 1.065 9 calculated by the traditional stability method,that is,the landslide is in an unstable state,combined with the analysis of the point-surface evaluation index of the landslide,in the process of the landslide moving forward in the critical state,the 29th block calculated by the strip method has a sud-den mutation,which proves that the landslide may suddenly fail after moving to the 29th block at the critical state point,and the calculation results of the ideal elastoplastic model and the shear stress model are compared and analyzed,and the strip method based on the shear stress constitutive model is closer to the force of the landslide,which can provide a reference for the monitoring and early warning of the landslide.
关键词
条分法/本构模型/临界状态/滑坡/渐进破坏Key words
slices method/constitutive model/critical state/landslide/progressive failure引用本文复制引用
基金项目
国家自然科学基金面上项目(41372363)
国家自然科学基金面上项目(41641027)
三峡后续工作地质灾害防治项目(0001212015CC0005)
出版年
2024
国家科技期刊平台
NSTL
万方数据