预应力锚索框格梁加固岩质边坡的数值模拟研究  

Numerical simulation research on rock slope reinforced by prestressed anchor cable girder

作　　者：吴晓彬[1,2] 陈芳 林太清[1,2] WU Xiaobin;CHEN Fang;LIN Taiqing(Jiangxi Institute of Water Conservancy, Nanchang 330029, China;Jiangxi Hydraulic Safety Technology Research Center, Nanchang 330029, China)

机构地区：[1]江西省水利科学研究院,江西南昌330029 [2]江西省水工安全技术研究中心,江西南昌330029

出　　处：《水利建设与管理》2019年第2期17-21,共5页Water Conservancy Construction and Management

基　　金：江西省水利厅科技项目--峡江枢纽右岸高边坡的监测分析及长期稳定性能研究(KT201514);泥质红砂岩渠道开挖边坡的失稳机理与防治措施研究(201821ZDKT24)

摘　　要：本文依托峡江水利枢纽右岸岩质边坡治理工程,利用ABAQUS有限元软件进行三维建模,结合室内试验和现场监测数据,深入研究了预应力锚索框格梁支护的岩质边坡治理效果以及降雨对边坡稳定性的影响。分析可知,数值模拟计算孔内锚索应力值及孔周裂缝宽度呈先增大后减小并趋于稳定的变化规律,与实测值变化情况基本一致,受预应力锚索应力损失影响,锚索应力计算值整体大于实测值;坡顶水平位移随降雨时长及降雨入渗强度的增加而增大,带裂缝工作的岩质边坡在强降雨作用下易出现变形陡增从而诱发滑坡。Three-dimensional modeling is carried out by using ABAQUS finite element software based on the rock slope treatment project at the right bank of Xiajiang water conservancy project. Laboratory tests and on-site monitoring data are combined for deeply studying the treatment effect of rock slope supported by prestressed anchor rope frame girder and the influence of rainfall on the slope stability deeply. It can be seen from the analysis that the anchor cable stress value in the hole and the change rule of being more and more stable after increase-decrease are calculated by numerical simulation, which is basically consistent with the change of the measured value. The calculated stress value of the anchor cable is larger than the measured value on the whole due to influence of stress loss of the prestressed anchor cable. The horizontal displacement of slope top increases with the increase of rainfall duration and rainfall infiltration intensity. The rock slope with fractures is prone to undergo abrupt deformation and induce landslides under the action of heavy rainfall.

关 键 词：岩质边坡 预应力锚索框格梁 数值模拟 裂缝宽度 降水 

分 类 号：TV332[水利工程—水工结构工程]