贴坡型面板堆石坝三维应力变形分析

3D analysis of stress and deformation for fitting-slope CFRD

某混凝土面板堆石坝建在一段倾斜的不平整基岩上,为了考察该特殊坝基对坝体应力变形是否有不利影响,必须对该坝进行三维有限元分析。采用网格自动生成程序生成了贴坡型面板堆石坝的三维有限元网格,对该面板堆石坝进行了非线性三维静力有限元分析。通过计算得到了坝体和面板的应力变形分布规律,验证了利用此特殊地形不仅能减少开挖量,而且对面板堆石坝应力变形无不利影响,为贴坡型面板堆石坝的设计和施工提供了依据。

A CFRD is built on an inclined and uneven rock mass,and 3-D FEM analysis was performed to study whether this special dam foundation has adverse effect on the stress and deformation of the dam.The mesh automatic generation program was used to generate the three-dimensional finite element mesh of the fitting-slope concrete faced rockfill dam.By using 3-D static non-linear FEM,the stress and deformation property of this CFRD was analyzed,and the stress and deformation distribution of the dam body and face slab was obtained by calculation,which verified that the particular terrain could reduce excavation,and there is no adverse effect on stress and deformation of the CFRD.The calculation result can supply important basis for design and construction for fitting-slope concrete face rockfill dam built on inclined rock mass.