长江三峡工程水库塌岸研究

Study on Reservoir Bank Collapse and lts Engineering Prefention in theThree Gorges Project

水库塌岸是影响三峡水库移民工程安全的重大地质灾害问题。该文在分析三峡库区塌岸特征的基础上,总结了近期库区塌岸治理工程治理的若干关键技术问题,论述了三峡库区塌岸预测方法。以兴山县高阳镇库岸治理工程为例,介绍了库岸稳定分析、库岸再造范围预测和工程治理方案论证的方法、步骤和具体内容。

Reservoir bank collapse is orie of the most important geological disasters, which influence the security of iirimigration engineering in the reservoir area of the Three Gorges project, It is of most importance for nonnal opera-tion of the Three Gorges project to protect reservoir bank collapse systemalically. On the basis of the analysis of the characteristic of the reservoir collapse in the Three Gorges Project, some of the key lechnical problema in collapse treatment are studied and the prediction methods of collapse are introduced. The possibility of proteeting engineering, load cornponenls in engineering desigri, stability calculation method, security -factor and engineering measures are analyzed m detail. Taking reservoir bank treatment engineering in the towu of Gaoyang , Xing shan County as an exampie , Tne aut-hor introduces the methods , steps and contenls oi slope stability analysis, reservoir bank reproducing prediction , sta-bilily area division and engineering measures oi tbe research . From the study some conclusions can be made as follow; (1) Reservoir bank collapse will be an impoitant geological disaster, which influence the security of immigrating engineering in the Three Gorges Project. The first thing for engineering design of preventing measures is to determine the importance grade and security standard of the reservoir bank. (2) The basie load components include reservoir water movement, gravity oi rock and soil and engineering aclion and the sperial load components plus seisrmc action. (3) Normally imbalance push niethod can be used in the oalculation of reservoir bank stabihty, while Sanna method can be used for comparison. (4) To predict the site of bank collapse, we can mainly use dynamic, statistic and experimental methods. It is shown to be effective to make space prediction of reservoir bank collapse for the basie infonnation needed for engineering measnres. (5) Engineering measures for reservoir bank collapse prevention must be determined by comprehensive factors, and monitoring work is needed for disaster forecasting.