冶勒水电站坝基防渗处理设计

冶勒水电站大坝为沥青混凝土心墙堆石坝，建造于高地震烈度区、深厚不均匀覆盖层上。坝基防渗左岸采用混凝土防渗墙接基岩灌浆帷幕，河床部位采用混凝土防渗墙嵌人覆盖层相对隔水层内一定深度，连接渐变为右岸防渗墙接深帷幕灌浆，右坝肩基础最大防渗深度约200m，采用两层合计140m深混凝土防渗墙接60m深帷幕灌浆联合防渗。该坝基防渗处理的设计与施工难度国内外罕见，目前工程进展基本顺利。

Design of seepage control in dam foundation of the Yele Hydropower Station

The dam for the Yele Hydropower Station is an asphalt concrete core rockfill dam, built in an area with high seismic intensity and non-uniform thick overburden cover. The left abutment foundation seepage control structure is composed of concrete diaphragm wall and grouting curtain. The grouting position in the bed of river is concrete diaphragm wall in relative impervious overburden cover. The right abutment foundation seepage control structure is composed of concrete diaphragm wall and curtain grouting in thick overburden cover. The depth of right abutment foundation seepage prevention is about 200 m, composed of 140 m deep of concrete diaphragm wall and 60 m deep of grouting curtain. Its difficulty of design and construction is rare in world. This paper introduces design progress through Yele dam foundation seepage control system. It is very useful for other similar projects for reference.