金川水电站左岸引水发电系统进水口高边坡稳定性分析  

Stability analysis of the high side slope near the inlet of the diversion power system on the left bank of the Jinchuan Hydropower Station

作　　者：唐良琴[1,2] 刘东燕[1] 余先华[3] 唐奎[4] 

机构地区：[1]重庆大学土木工程学院,重庆400044 [2]重庆交通大学水利水运工程教育部重点实验室,重庆400074 [3]重庆市沙坪坝区国土资源管理分局,重庆400038 [4]重庆理工大学数学与统计学院,重庆400050

出　　处：《水文地质工程地质》2013年第4期99-105,共7页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金资助项目(41072229);水力学与山区河流开发保护国家重点实验室(四川大学)开放基金资助(201110);重庆交通大学水利水运工程教育部重点实验室暨国家内河航道整治工程技术研究中心开放基金资助(SLK2011B04)

摘　　要：金川水电站左岸引水发电系统进水口边坡开挖高度约160m,边坡稳定性是该工程的主要地质问题之一。通过现场详细勘察,在分析该边坡的地层岩性、坡体结构、结构面及其组合、风化卸荷等工程地质特征基础上,建立了边坡和结构面的三维地质模型,结合边坡的开挖设计,进行平行和垂直轴向边坡方向的剖切,从而得到块体组合情况。然后,利用岩石边坡块体稳定性计算程序对各潜在不稳定块体进行计算。在现场统计坡比基础上,就如何选定一个安全经济的坡比进行探讨。采用有限元法对不同工况下的边坡稳定性进行了分析与评价,为设计和施工提供了科学依据。The inlet excavation of the diversion power system of the Jinchuan Hydropower Station results in a slope of about 160 m height,whose stability is one of the main geological problems of the project.Through detailed investigation of the site,this paper analyzes the engineering geological characteristics of the intake slope,including lithology,slope structure,structural surface and its combinations,rock weathering and unloading,hydrology,etc.A 3-D geologic model of slope and structural surface is established with space coordinate.Under the consideration of the slope excavation design,slices of the parallel and vertical axial side slope are carried out.Thus,the block body combination situations are obtained.The stability of potentially unstable blocks is calculated by means of business analysis software for the stability of rock slope wedges.On the basis of site slope ratio statistics,the problem of how to select a safe and economic excavation slope ratio is studied.The finite element method is used to calculate and analyze the deformation and stress states and the safety factors for three kinds of working conditions(including natural condition,rainstorm condition and earthquake condition).The results of analysis and evaluation provide a scientific basis for the design and construction of the project.

关 键 词：金川水电站 高边坡 块体稳定性 边坡开挖坡比 有限元法 

分 类 号：TV221.2[水利工程—水工结构工程]