坝体材料分区对高面板堆石坝应力变形的影响

摘要

300 m级高面板堆石坝合理的坝体材料分区是坝体变形控制的主要措施之一。以某300 m级高面板堆石坝为例，考虑坝体填筑分期和坝体材料分区形式，建立有限元模型，采用数值分析方法研究了300 m级高面板堆石坝坝体不同材料分区对坝体应力变形的影响。通过拟定坝体不同的材料分区方案，比较了各方案下坝体的应力变形情况，结果表明：设置顶部增模区，缩小次堆石区范围，即主次堆石区分界线以一定坡比倾向下游的坝体材料分区设计对坝体变形控制有利。%Reasonable material partition is one of major measures to control the deformation for 300 m high CFRD. Based on a 300 m high CFRD, a finite element model was established by considering construction stage and division of material zone of rockfill. Influence of material partition on the dam deformation and stress were researched by the method of numerical simulation. Stress and deformation analysis were compared by drawing up different material partition. The results show that the filling of rockfill with higher modulus near the steep abutment and reducing the minor material zone are advantageous to the dam deformation control.