锦屏水电站左岸坝头边坡变形拉裂岩体稳定性评价  

Stability evaluation of the deformed tension-fracture rockmass in the abutment slope on the left side bank at the Jinping hydroelectric power station in Southwest China

作　　者：林锋[1] 黄润秋[1] 严明[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《成都理工大学学报（自然科学版）》2009年第5期487-491,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家自然科学基金雅砻江水电开发联合基金重点资助项目(50539050)

摘　　要：锦屏水电站左岸坝头斜坡内发育一较大规模的变形拉裂岩体,预测其在施工期的稳定性对于开挖方案选择及初步确定支护方案至关重要。基于块体理论,采用整块模型和分块模型,对该变形拉裂岩体在两种开挖方案下的稳定性进行了系统分析。结果表明,大开挖方案的主要作用为卸载效应,利于块体稳定;地下水对块体稳定性影响显著,应加强对地下水分布状况及排水方案的研究。There is a large-sized deformed tension-fracture rockmass in the slope on the left side bank at Jinping hydroelectric power station of Yalongjiang River in Southwest China. It is very important to forecasting its stability during the abutment slope＇s excavating because of selecting excavating and preliminary supporting schemes. Based on the block theory, through using individually integral model and blocking model, the stability analysis of the tension-fracture rockmass is systematically done based on two different excavating schemes. The result shows that the main effect of the heavy excavation is unloading and in favor of the block stability. Furthermore, groundwater evidently affects the block stability, so groundwater and its draining scheme should be seriously researched.

关 键 词：变形拉裂岩体 块体理论 整块模型 分块模型 稳定性评价 

分 类 号：TU457[建筑科学—岩土工程]