浙江58省道K15+200边坡变形破坏过程分析  

Analysis on Deformation Process of K15+200 Slope at Provincial Highway 58 in Zhejiang

作　　者：董正威 许建聪[2,3] 

机构地区：[1]泰顺县公路管理段,浙江泰顺325500 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]杭州丰强土建工程研究院,杭州310008

出　　处：《路基工程》2012年第4期4-7,11,共5页Subgrade Engineering

基　　金：国家自然科学基金项目(40872179);浙江省交通厅科技计划项目(2009H64)

摘　　要：为了分析含碎石粘性土边坡的变形破坏过程,以浙江省58省道K15+200滑坡为例,采用弹塑性有限元强度折减法和反分析方法,计算边坡的整体安全系数和分析该滑坡的稳定性以及变形破坏过程。结果表明,含碎石粘性土边坡的变形破坏主要是在降雨作用下边坡变形破坏过程中滑坡体各部位水平位移和竖向位移的不一致和塑性应变的不断发展引起的;采用弹塑性有限元算法可以更好地反映该类型滑坡所处的实际状态及滑坡的滑动过程。In order to analyze deformation process of gravel clay slope, taking K15 ＋ 200 landslide at Provincial Highway 58 in Zhejiang as the example, the overall safety coefficient of the slope is calculated and the stability and deformation process of the landslide is analyzed by elasto-plastic FEM based on the strength reduction technique and inverse analysis. The results show that the deformation of gravel clay slope is mainly caused by, under the action of rainfall, the inconsistent horizontal and vertical displacements of various parts of the landslide mass as well as the continuous developing plastic strain; elasto-plastic FEM could reflect the actual status of this type of landslide and its sliding process to a better extent.

关 键 词：含碎石粘性土边坡 弹塑性有限元 反演分析 解体破坏 

分 类 号：U416.14[交通运输工程—道路与铁道工程]