金沙江乌东德水电站枢纽区高位自然边坡块体安全性评价与处理措施研究  

Study on Block Safety Evaluation and Treatment Measures of High Natural Slope in Key Region of Wudongde Hydropower Station of Chin-sha River

作　　者：李会中[1] 刘冲平[1] 黄孝泉[1] 王吉亮[1,2] 杨静[1] 王汉辉 郝文忠[1] 白伟[1] 

机构地区：[1]长江三峡勘测研究院有限公司,湖北武汉430074 [2]长江勘测规划设计研究院,湖北武汉430010

出　　处：《资源环境与工程》2011年第5期468-473,共6页Resources Environment & Engineering

摘　　要：高边坡是中国西部水电工程建设常遇的环境地质问题,乌东德水电站枢纽区所处金沙江河谷呈狭窄"V"型,谷坡高达830～1 036 m,其稳定状况不仅影响工程施工期安全,还事关工程运行安全。以现场地质调查分析为依据,简述了工程边坡开口线之上高位自然边坡存在的局部稳定问题,以块体为例进行了块体分类、稳定性评价、安全性分级与防治方案研究,提出了基于失稳模式的块体分类方法、针对块体类型的稳定性评价标准、考虑块体自身稳定性与影响工程对象重要的安全性分级原则、基于块体常规加固措施对比分析并综合考虑块体安全性等级、规模类型及特殊地形地质条件的块体防治措施,并吸取众多工程教训,创新性提出了率先实施高位自然边坡防治工程、消除工程施工与运行安全环境隐患的工程理念,为工程设计与施工提供了重要依据,可作为其它类似工程参考。Environmental geological problems of High slope can often be found in the constructions of hydropower stations in west part of China.Key region of Wu dongde hydropower station is located on Chin-sha River valley which has the shape of narrow ＂V＂.The height of the valley is 830~1 036 m,the state of stability not only affects the safety of the construction period,but also be concerned with the safety of the operating of the construction.On the basis of the analysis of field geological investigation,stability problems of some parts of the high slope have been stated briefly.Taking block as example,study on block classification,stability evaluation,safety classification and prevention scheme have been carried out.By the analysis above,some conclusions have been got：firstly,the block classification method based on the unstable mode,as well as the stability evaluation standard based on the block types are put forth;secondly,safety classification principles concerning with the stability of block are got;thirdly,prevention measures on the basis of the comprehensive thinking of the grade,scale,types of block safety and special topographic geological condition have been propounded;last but not least,the new concept of taking out prevention project of high natural slope construction,meanwhile,eliminating the hidden trouble of the safety condition of the construction is brought out creatively,which provides the important basis for the design and construction of the engineering.

关 键 词：乌东德水电站 高位自然边坡 块体分类 稳定性评价 安全性分级 

分 类 号：X141[环境科学与工程—环境科学] P642[天文地球—工程地质学]