土工膜防渗技术在泰安抽水蓄能电站上水库的应用

介绍了泰安抽水蓄能电站上水库HDPE土工膜防渗方案的设计过程和施工方法,包括防渗层材料的选择,防渗层、下支持层、上保护层设计,土工膜周边连接方案,土工膜施工焊接工艺和无损质量检测方法等方面取得的成果。实践表明,土工膜防渗技术在泰安抽水蓄能电站的应用是成功的,水库已安全运行4年,库水外渗水量很小,库底最大总渗漏量仅为3.89 L/s,上水库总渗漏量仅为总库容的万分之三,防渗效果很好,节省投资3 200万元,缩短施工工期4~6个月,为我国大型水电工程土工膜防渗技术的应用积累了经验。

Application of geomembrane in seepage control technique in upper reservoir of Tai'an pumped storage power station

The design process and construction method of the geomembrane HDPE for seepage control of the upper reservoir of the Tai'an pumped storage power station are introduced,including the material choices;the design of the seepage resistance layer,underlying supportive layer and overlying protective layer;the peripheral connection of the geomembrane;and the non-destructive quality detection method.The application of geomembrane in the seepage control technique for the Tai'an pumped storage power station has been successful.The reservoir has already operated safely for 4 years.The seepage volume is very small,and the maximal seepage volume of the reservoir bottom is only 3.89 L/s.The anti-seepage effect is satisfactory and the total seepage volume of the upper reservoir is only one ten-thousandth of the total storage capacity.The investment has been reduced by 32 million yuan and the construction time reduced by 4-6 months,providing a positive experience of application of geomembrane in seepage control for large hydropower projects in China.