某大型水电站高位边坡开挖的变形响应研究  

Deformation response of high-order slope excavation of a large hydroelectric station in China

作　　者：朱继良[1,2,3] 黄润秋[1] 张诗媛[3] 徐德敏[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,四川成都610059 [2]广西电力工业勘察设计研究院,广西南宁530023 [3]中国地质调查局水文地质环境地质调查中心,河北保定071051

出　　处：《岩土工程学报》2010年第5期784-791,共8页Chinese Journal of Geotechnical Engineering

基　　金：广西电力工业勘察设计研究院博士后基金项目

摘　　要：针对西南某大型水电站高达近700 m的人工高边坡,通过大量现场跟踪施工的地质调查工作,系统研究了复杂地质条件和高地应力环境下,岩石高边坡大坡比、强开挖所表现的变形响应,揭示了此类边坡变形响应的基本规律及特殊表现。研究表明:高边坡开挖过程中,边坡的变形与开挖过程有较强的同步性。变形主要受开挖卸荷影响,随开挖的进行,坡体的变形随开挖面的远离表现出总体衰减,最终稳定的响应特征。Through abundant geological investigation of in-situ construction tracing of the 700-meter-long slope of a large hydroelectric station in the southwest of China,the deformation response of high rock slope with large sloping ratio is studied under complex geological and high in-situ stress.Through systematical studies,the basic laws and special characteristics of its deformation responses are acquired and classified as follows：（1） During the slope excavation,the slope deformation and its excavation process exhibit strong synchronism.（2） The slope deformation is mainly influenced by the excavation.（3） The slope deformation generally decreases with the distance between the excavation face and the monitoring position,whose responding features of the ultimate stability have three stages,that is,rapid increase stage of deformation,slow enhancement stage and stable stage.

关 键 词：水电站 高边坡 开挖 变形响应 

分 类 号：TV223[水利工程—水工结构工程]