防渗膜属于一种新型的防水材料，在水库、围堰、渠道、交通都用来作防渗体，应用越来越普遍。我们在做围堰防渗时，采用铺装防渗膜作用经运行效果不错，谈谈自己的体会。 一、准备工作 １．计算所需防渗布的规格、数量，力求考虑准确，搭接、焊接尽量大于所需量的２～３％。 ２ Impervious membrane belongs to a new type of waterproof material, in the reservoir, cofferdam, channels, traffic are used as anti-seepage body, the application is more and more common. We are cofferdam seepage control, the use of pavement impermeable membrane effect by running well, talk about your own experience. First, the preparatory work 1. Calculation of the required impermeable cloth size, quantity, and strive to consider accurate, lap, welding as much as the required amount of 2 to 3%. 2