Stability Analysis of the High Side Slope near the Inlet of the Diversion Power System on the Left Bank of the Jinchuan Hydropower Station
详细信息
- 责任者：Tang Liangqin (College of Civil Engineering ; Chongqing University ; Chongqing 400044 ; China) ; Liu Dongyan
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2013
- 卷期：40(4)
- 关键词：边坡稳定性 ; slope stability ; 四川 ; Sichuan Province
- 页码：p.99-105
- 图表：illus., 5 tables, 9 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
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.