西霞院反调节水库复合土工膜斜墙砂砾石大坝防渗施工技术

Anti-seepage technique for sand-gravel dam with compound geomembrane inclined wall of Xixiayuan Counter Reservoir

将复合土工膜作为黄河西霞院反调节水库砂砾石大坝的防渗材料,探讨了复合土工膜作为砂砾石坝体防渗材料时的主要性能指标,介绍了复合土工膜在大坝防渗中的施工程序、施工工艺、施工方法、施工过程中的质量控制情况。从初步运行情况看,鉴于复合土工膜防渗性能优良、质量轻、对不均匀沉降适应能力强等优点,其应用是成功的,但在今后的运行中仍需加强监测。

The compound geomembrane is used as impervious material for the sand-gravel dam of the Xixiayuan Counter Reservoir. The performance indexes of compound geomembrane when it is used as impervious material in the sand-gravel dam were studied. The construction procedures, construction craft, method, and quality control during construction of the compound geomembrane for dam seepage control are introduced. In view of the advantages of good permeability, light quality and strong adaptability to uneven settlement, results of preliminary operation indicate that the application of geomemhrane is successful, but monitoring is still required in future operation.