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对拟建在深厚覆盖层上的冶勒沥青混凝土心墙堆石坝进行了非线性有限元分析 ,研究了折线形与直线形心墙型式及直线形心墙型式不同底部尺寸对防渗体系应力状态和工作性态的影响 .结果表明 :直线形心墙由蓄水引起的坝体垂直位移变化大于折线形心墙 ,相应蓄水后心墙与基础接触面上的法向应力也稍大 ,从接触面防渗及施工方便的角度考虑 ,以采用直线形心墙为宜 ;直线形心墙底部宽度在 0 9～ 1 2m之间变化时 ,心墙、防渗墙及两者结合部的应力变化不大 ,可在满足渗径长度前提下尽量选择较小的底宽尺寸 ,以降低工程造价
The non-linear finite element analysis of Yele asphalt concrete core rockfill dam which is to be built on deep overburden is carried out. The effects of the different bottom sizes of broken line, linear center wall and straight core wall on the seepage prevention system stress The results show that the vertical displacement of linear dam caused by water storage is larger than that of the polygonal linear core, and the normal stress on the contact surface between the core wall and the foundation is correspondingly larger after the corresponding impoundment, From the point of contact surface impermeability and construction convenience point of view, the use of linear core wall is appropriate; straight bottom wall width between 0 9 ~ 1 2m change, the core wall, cut-off wall and the combination of the two Little change in stress, try to choose a smaller bottom-width size under the premise of the osmotic length to reduce the project cost