Double-row anti-seepage structure of deep covering layer: Fid-Bau Portal

Double-row anti-seepage structure of deep covering layer

XING CHENGHAO / LIN HENGXING / ZHANG FANGYONG / HUANG SHENGQUAN / GONG XUWEI / LIU LI / TANG YUJIE

The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a double-row anti-seepage structure of a deep and thick covering layer. The double-row anti-seepage structure of the deep and thick covering layer comprises a core-wall rock-fill dam, a front-row anti-seepage wall and a rear-row anti-seepage wall, the core-wall rock-fill dam is arranged above the deep and thick covering layer, and the front-row anti-seepage wall and the rear-row anti-seepage wall are sequentially arranged in the deep and thick covering layer in parallel at intervals in the direction from the upstream to the downstream. The front-row anti-seepage wall and the rear-row anti-seepage wall are both perpendicular to the flow direction of water flow, the top of the front-row anti-seepage wall is vertically inserted into an anti-seepage body of the core-wall rockfill dam, the bottom of the front-row anti-seepage wall is vertically inserted into a bedrock layer below a deep covering layer, and the top of the rear-row anti-seepage wall is vertically connected with a gallery at the bottom of the core-wall rockfill dam; and the bottom of the back-row diaphragm wall is vertically connected with the curtain grouting structure in the bedrock layer. The double-row anti-seepage structure of the deep covering layer can improve the anti-seepage effect.

本发明涉及水利水电工程技术领域，尤其涉及一种深厚覆盖层的双排防渗结构。该深厚覆盖层的双排防渗结构，包括心墙堆石坝、前排防渗墙和后排防渗墙，心墙堆石坝设置在深厚覆盖层的上方，前排防渗墙和后排防渗墙沿上游至下游方向依次平行间隔设置在深厚覆盖层中，且前排防渗墙和后排防渗墙均与水流的流向相垂直，前排防渗墙的顶部竖直插设在心墙堆石坝的防渗体中，前排防渗墙的底部竖直插设在深厚覆盖层下方的基岩层中，后排防渗墙的顶部与心墙堆石坝坝底的廊道竖直连接，后排防渗墙的底部与基岩层中的帷幕灌浆结构竖直连接。该深厚覆盖层的双排防渗结构能够提高防渗效果。

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