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-  2016 

黄金坪坝基防渗墙地震反应规律 Seismic response law of cutoff wall of Huangjinping rockfill dam

Keywords: 堆石坝,防渗墙,深厚覆盖层,动力分析

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Abstract:

为研究地震作用对深厚覆盖层中坝基防渗墙的应力变形规律的影响并评价其抗震安全性,以黄金坪沥青混凝土心墙堆石坝为工程背景,在三维非线性静力分析的基础上,对坝基防渗墙进行了地震动力时程分析,动力计算中,坝体材料及覆盖层采用Hardin-Drnevich本构模型.计算结果表明,在地震过程中,防渗墙加速度和动位移反应均较小;横河向最大拉应力相比于静力工况增加了10.9%,防渗墙拉裂状况基本没有恶化;竖直向最大压应力为-33.62 MPa,增幅为0.9%;竖直向压应力最大值仅1.8%来自于地震波作用.综合看来,设计地震对防渗墙的应力变形状态影响不大

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