河流冲刷作用下高边坡的稳定性研究  

Study on the Stability of High Slope Caused by River Precaution

作　　者：李会杰[1] LI Huijie(The First Team Henan Coal Field Geology Bureau,Zhengzhou Henan 450000)

机构地区：[1]河南省煤田地质局一队,河南郑州450000

出　　处：《河南科技》2020年第25期81-83,共3页Henan Science and Technology

摘　　要：堤防在季节性或周期性发挥作用的过程中造成堤防冲刷现象十分普遍和严重。本文将堤防假定为各向同性的均质弹性体,基于流体力学理论构建了河流冲刷作用下的堤防渗流场模型,运用三维有限元研究了河流冲刷堤防边坡的三维问题,并分析了渗流和冲刷共同作用下堤防边坡的失稳过程。结果表明:堤防边坡的坡脚首先出现塑性,随着冲刷作用的持续进行,塑性继续向边坡上部发展,并最终发展到坡顶,塑性区域贯通后,引起边坡的失稳,形成滑坡。Dike erosion is very common and serious in the process of seasonal or periodic function.In this paper,the dike was assumed to be an isotropic homogeneous elastic body.Based on the theory of fluid mechanics,the seepage field model of embankment under river erosion was constructed.The three-dimensional finite element method was used to study the three-dimensional problem of embankment slope scoured by river,and the instability process of em⁃bankment slope under the joint action of seepage and scouring was analyzed.The results show that:the slope toe of embankment slope first appears plasticity,with the continuous erosion,the plasticity continues to develop to the up⁃per part of the slope,and finally develops to the top of the slope.After the plastic area passes through,it causes the slope instability and forms landslide.

关 键 词：理论分析 有限元技术 冲刷力 渗透力 自重应力耦合力系 

分 类 号：TU473[建筑科学—结构工程]