超高面板堆石坝混凝土面板应力状态影响因素分析  

Factors for stress behavior of concrete face slab of super-high CFRD

作　　者：沈婷[1] 李国英[1] 

机构地区：[1]南京水利科学研究院,江苏南京210029

出　　处：《岩土工程学报》2010年第9期1345-1349,共5页Chinese Journal of Geotechnical Engineering

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(Y30702)

摘　　要：面板受力特性与应力改善措施研究是高面板堆石坝研究的关键技术问题之一。影响面板受力特性的最主要因素是坝体变形,尤其是坝体后期变形。对于超高混凝土面板堆石坝,坝体后期变形大,易造成面板和面板垂直缝的挤压破坏。压型面板垂直缝采用一定宽度的柔性缝型式,可吸收压缩变形,消减面板轴向压应力。采取合理的坝体变形控制措施,合理的分缝和结构型式是改善超高混凝土面板堆石坝面板应力状态,避免或减少面板产生结构性裂缝的关键所在。The research on the stress behavior of concrete face and its improvement measures is one of key technical problems for high CFRD.The dam deformation,especially the post dam deformation,is the key factor to determine the stress behavior of the concrete face.For super-high CFRD,large post dam deformation easily causes damage of concrete face and vertical joints.Compression vertical joints adopting flexible joints with enough width can absorb the axial deformation and reduce the axial pressure of the concrete face.The deformation control and suitable joint plan are the key to improve the stress behavior of the concrete face and are also the key to avoid or reduce the rupture of the concrete face.

关 键 词：超高混凝土面板堆石坝 面板受力特性 后期变形 挤压破坏 

分 类 号：TV641[水利工程—水利水电工程]