人工湖是改善城市生态环境不可缺少的水利工程设施。人工湖使用的复合土工膜作为一 种新型的防渗建筑材料，具有强度高、造价低和施工方便等优点。我国从２０世纪８０年代开始 使用，生产技术不断提高，在北京地区河湖防渗中得到广泛应用。特别是一布一膜（土工膜） 在人工湖防 Artificial lake is an indispensable water conservancy project to improve the urban ecological environment. As a new impermeable building material, artificial geomembrane used in artificial lake has the advantages of high strength, low cost and convenient construction. Since the 1980s, China started to use it, and its production technology has been continuously improved. It has been widely used in seepage control of rivers and lakes in Beijing. In particular, a cloth film (geomembrane) in the artificial lake