胶凝砂砾石坝防渗措施及应力分析

由于胶凝砂砾石材料抗渗性能较差,采用其筑坝时需专门设计防渗措施进行坝体挡水。本文对胶凝砂砾石坝钢筋混凝土面板防渗措施,及新提出的高强度胶凝砂砾石面板和高强度胶凝砂砾石面板下铺设复合土工膜两种新型防渗措施进行渗流分析、考虑渗流作用的应力分析。计算结果表明:钢筋混凝土面板防渗效果较好,高强度胶凝砂砾石面板防渗效果较差;钢筋混凝土面板主应力最大、坝趾应力集中较为明显,高强度胶凝砂砾石面板和高强度胶凝砂砾石面板下铺设复合土工膜应力分布较为均匀。

Analysis of stress and seepage control measures in the Cement sand gravel dam

Due to the poor anti-seepage of the cement sand gravel materials, special seepage control mea-sures should be designed for the water retaining requirement of the dam. In this paper, both seepage and stress analysis under seepage condition were carried out for the cement sand gravel dam with seepage con-trol measures. Reinforced concrete panel and two novel measures: high strength cementations sand grav-el panel and high strength cementations sand gravel panel with laying composite geomembrane were consid-ered. Numerical results show that reinforced concrete panel perfoms well in seepage control while high strength cementations sand gravel concrete panel acts relatively poorly. The maximum principal stress ap-pears in the reinforced concrete panel and stress concentration at the dam toe is obvious. The stress distri-bution is more uniform in high strength cementations sand gravel panel and high strength cementations sand gravel panel with laying composite geomembrane.