高坝建基面开挖卸荷松弛分析及启示  

Analysis of High Dam Foundation Excavation Relaxation and Revelation

作　　者：冯学敏[1] 

机构地区：[1]中国水电顾问集团成都勘测设计研究院,四川成都610072

出　　处：《水电站设计》2010年第1期1-7,共7页Design of Hydroelectric Power Station

摘　　要：提出了高坝建基面开挖卸荷松弛的问题,归纳了开挖卸荷松弛的典型特征及其分带标准并初步分析了其机理。采用三维弹粘塑性有限元法对锦屏一级拱坝建基面开挖卸荷松弛进行了数值分析,得出了可能发生松弛的区域及松弛程度。对高坝建基面的合理选择及其施工方式提出了量化指标和建议。In this paper high dam foundation excavation relaxation is investigated, typical features of the excavation relaxation and its zoning criterion are summarized and its mechanism is analysed preliminarily. By adopting three dimensional elasto - viscoplastic finite element method, the numerical analysis for Jinping I arch dam foundation excavation relaxation is implemented and the possible relaxation zones and the corresponding relaxation degrees are demonstrated. Quantitative indexes of and suggestion for high dam foundation interface reseasonable selection and its construction methods are given.

关 键 词：高坝 建基面 开挖卸荷松弛 松弛区分带 建基面选择 施工方式 锦屏一级水电站 

分 类 号：TV223[水利工程—水工结构工程]