三维复合排水网在抽水蓄能电站库底防渗中的研究与应用

Application of three-dimensional composite drainage net in reservoir bottom seepage prevention system of Liyang Pumped Storage Power Plant

溧阳抽水蓄能电站上水库库底采用土工膜防渗,遵循"上截下排、防排结合"原则,土工膜下通过设置三维复合排水网,以汇集透过土工膜后的渗漏水并及时排走,三维复合排水网在类似水电工程中大面积使用尚属首次,其实际排水效果及能力有待工程蓄水投运后进行检验。

The geomembrane is adopted for seepage-prevention in the upper reservoir bottom of Liyang Pumped Storage Power Plant. According to the principle of“upper closure and lower drainage and combination of water resistance and drainage”, the three-dimensional composite drainage net is set up below the geomembrane to collect and drain leaked water through the geomembrane in time. It is the first time to adopt so large area of three-dimensional composite drainage net in the hydropower project in China. The actual drainage effect and capacity should be tested after the impoundment and operation of the project.