大石门水利枢纽工程坝后左岸高边坡处理及稳定分析  

High Slope Treatment and Stability Analysis of Left Bank behind Dam of Dashimen Water Control Project

作　　者：董武斌 DONG Wu-bin(Xinjiang Survey and Design Institute for Water Resources and Hydropower,Urumqi 830000,China)

机构地区：[1]水利部新疆水利水电勘测设计研究院,乌鲁木齐830000

出　　处：《水利科技与经济》2021年第6期87-90,共4页Water Conservancy Science and Technology and Economy

摘　　要：大石门水利枢纽工程大坝后坝坡左侧岸坡自然坡度约63°~70°,坡高壁陡。该左岸高边坡紧临厂址区,最近距离约40 m。采用FLAC3D对其边坡开挖前边坡的稳定性进行分析,原边坡现状基本稳定,但工程蓄水后由于左岸绕坝渗流的影响,边坡易失去稳定。为保证工程的运行及厂区安全,对大坝下游左岸砂砾边坡进行处理,砂砾石岸坡削坡高度约134 m,之后再进行边坡内外排水处理。根据不同开挖高程,分析施工期边坡开挖的稳定性,为施工期边坡开挖的施工安全措施及施工方法提供参考。The natural slope on the left side of the back dam slope of the dam of Dashimen water control project is about 63°~70°,and the slope is high and steep.The high slope of the left bank is close to the site area and the nearest distance is about 40m.By using FLAC3D to analyze the stability of the slope before excavation,the present situation of the slope is basically stable,but the slope is easy to lose its stability because of the seepage around the dam on the left bank after water storage.In order to ensure the operation of the project and the safety of the plant area,the sand and gravel slope on the left bank downstream of the dam is treated.And then the inside and outside of the slope drainage treatment.According to different excavation elevation,the stability of slope excavation during construction period is analyzed,which provides reference for the construction safety measures and construction methods.

关 键 词：砂砾石高边坡 FLAC3D 稳定性分析 

分 类 号：TV731[水利工程—水利水电工程] TV651