With the maturity of geomembrane materials and the construction progress, geomembrane has been widely used as an anti-seepage material in earth dam and cofferdam. As a new type of anti-seepage material, geomembrane is installed in different parts of earth dam, and its construction organization and anti-seepage effect will also be different. The whole reservoir basin surface of geomembrane has benefits such as better anti-seepage effect, simple construction, adapt to uneven settlement and investment saving. However, the drainage, air vent, anchoring and other stuctures under the membrane are also critical. The leakage drainage system plays the roles of integrity monitoring of the geomembrane, collecting the leakage water and the air vent aisle. The geomembrane anchoring system is mainly used to resist wind suction and the uplift of groundwater.

随着土工膜材料工艺的成熟及施工水平的提高，土工膜被越来越多地作为防渗材料应用于土石坝和围堰中。土工膜作为一种新型防渗材料，设置在土石坝不同部位作为防渗结构时，其施工组织与防渗效果也会有所差异。全库盆土工膜防渗，由于其防渗效果较好，施工简单，适应不均匀沉降能力强，并能有效节省投资，因此应用越来越广泛，但是土工膜底部的排水、排气及锚固等问题也较为突出。对于全库盆土工膜防渗，其渗漏排水系统起到监测土工膜完好程度、收集渗漏水及兼顾排气的作用，土工膜锚固系统则主要用于抵抗风吸力和地下水反向顶托作用。