基于Flac3D的不同水位下库岸边坡稳定性分析
Stability Analysis of Reservoir Bank Slopes Under Different Water Levels Based on Flac3D
靳忠强 1张延飞1
作者信息
- 1. 上海市政工程设计研究总院集团第十市政设计院有限公司,甘肃 兰州 730030
- 折叠
摘要
为探讨库岸堆积体边坡在不同水位下岸坡的变形特征、潜在破坏模式和稳定特性,以某库岸边坡治理项目为依托,建立三维库岸边坡模型,通过自编以坡面位移突变为判据的强度折减法FISH函数,对不同工况下库岸边坡的位移、稳定系数和最大剪切应变增量进行分析.结果表明:库岸堆积体边坡受水位扰动影响较大,低水位工况下,塑性区变化不大,稳定系数为1.46,较自重工况降低7.0%;而在高水位工况下,坡体进入了流塑状态,稳定系数为 1.32,较自重工况降低16.0%,虽满足规范要求,但安全富余不多,建议对该堆积体边坡进行治理.
Abstract
In order to explore the deformation characteristics,potential damage modes and stability characteristics of the bank pile slope under different water levels,this paper establishes a three-dimensional bank slope model based on a bank slope management project,and analyzes the displacements,stability coefficients,and maximum shear strain increments of bank slopes under different working conditions through the self-programmed FISH func-tion of the strength reduction method based on the sudden change of the slope displacements as a criterion.The results show that the slope of the bank pile is greatly affected by the water level disturbance,under the bottom wa-ter level condition,the plastic zone does not change much,and the stability coefficient is 1.46,which is 7.0%low-er than that of the deadweight condition;and under the high water level condition,the slope enters into the flow-plasticized state,the stability coefficient is 1.32,which is 16.0%lower than that of the deadweight condition,al-though it meets the specification requirements,the safety surplus is not much,and it is recommended to treat the slope of this pile.
关键词
库岸边坡/蓄水位/渗流—应力耦合/边坡稳定性Key words
bank slope/water level/seepage-stress coupling/slope stability引用本文复制引用
出版年
2024
NETL
NSTL
万方数据