冶勒堆石坝沥青混凝土心墙型式及尺寸研究

Study on Asphalt Concrete Core Type and Size of Yele Rockfill Dam

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 。

Presented in this paper is an FEM analysis for Yele asphalt concrete core rockfill dam to be built on a deep overburden.The influence of the core of the shape of inclined line and straight line and the influence of different bottom sizes of the straight line core on the stresses and characteristics of the dam and the impervious system are studied.The computational result shows that the change of the vertical displacement of the straight line core induced by storage is larger than that of the inclined line core and the normal stress on the interface between the core and the foundation is also larger.For anti seepage and convenience of construction,the straight line core is suggested.