岗曲河混凝土面板堆石坝三维静力应力变形分析  

3-D static stress and displacement analysis of Gangqu river concrete faced rockfill dam

作　　者：胡再强[1] 李宏儒[1] 苏永江[1] 

机构地区：[1]西安理工大学岩土工程研究所,西安710048

出　　处：《岩土力学》2009年第S2期312-317,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50778152)

摘　　要：采用邓肯模型对岗曲河面板堆石坝进行了三维有限元分析,研究软岩填筑层对坝体工作性能的影响,计算混凝土面板与岩石填筑层的位移和应力及周边缝变形。结果表明,由于受到下游堆石3D软岩填筑区的影响,坝体最大横断面最大沉降略偏向下游,总沉降量约为坝高的0.2%,面板周边缝位移的绝对值一般都小于2cm,周边缝的止水设计需注意选择合理的止水形式和填缝材料,由于坝址河谷狭窄,受岸坡约束,三维效应对坝体的应力变形影响较明显,为设计施工提供了参考。A 3-D finite element analysis by applying Duncan model is carried out to calculate stresses and deformations of the Gangqu River concrete faced rockfill dam.The effects of 3-D soft rock fillings on the behavior of the dam are discussed.The displacements and stresses of concrete slab and rock fillings as well as deformations of peripheral joints are calculated.The maximum settlement of the cross-section is found to be located at the downstream side with a value corresponding to 0.2% of the dam height.The displacement of peripheral slab joints is small,less than 2.0 cm during reservoir impounding.The type of watertight and joint sealing material should be selected carefully.The effect of the 3-D characteristics of canyon shape on the behavior of CFRD is found to be significant.Numerical simulation results provide for reference in design and construction.

关 键 词：面板堆石坝 面板周边缝 应力应变 三维有限元 

分 类 号：TV641.43[水利工程—水利水电工程]