溧阳抽水蓄能电站土工膜防渗应用综述

Review on the Application of Geomembrane Anti-seepage System in Liyang Pumped-storage Power Station

溧阳抽水蓄能电站上水库库底通过开挖和回填处理形成,库底不均匀沉降对防渗材料适应变形能力要求高,通过利用土工膜防渗材料,较好地解决了库底不均匀沉降问题,并取得了良好的防渗效果。目前渗流量约占库容总量的0. 008%,且土工膜防渗体系投资相对较少约180元/m2。通过对库底防渗方案、防渗材料采购及现场施工管理等进行总结,为更进一步完善土工膜施工及质量控制措施,提高土工膜在水电行业的适用性,提出了几点建议,以期为类似工程提供参考借鉴。

The bottom of upper reservoir in Liyang Pumped-storage Power Station is built by excavation and backfill, and the uneven settlement of bottom caused by exeavation and backfill requires the impervious material with high deformation capability. By using geomembrane, the problem of uneven settlement of reservoir bottom is solved, and the anti-seepage effect is good. Current seepage flow of upper reservoir accounts for about 0. 008% of total capacity, and the investment of geomembrane anti-seepage system is relatively lower about 180 Yuan/m2. The anti-seepage scheme, seepage material procurement and site eonstruction management are summarized, and some suggestions for improving the construction quality of geomembrane and the applicability of geomembrane in hydro projects are put forward.