1　工程设计塑性混凝土防渗墙在大型水利工程中应用比较普遍。其防渗机理是用相对不透水的混凝土置换透水的基础 ,在地下形成连续墙。近年开发出了薄型塑性混凝土防渗墙 ,在堤防防渗工程中得以应用。依兰县城区松干城堤 1 + 90 0～ 2 + 50 0段的防渗墙工程在我省首次应用了此项 1 engineering design of plastic concrete cutoff wall in large-scale water conservancy project is relatively common. The seepage prevention mechanism is to replace the water-permeable foundation with relatively impermeable concrete to form a continuous wall in the ground. In recent years, developed a thin plastic concrete cutoff wall, in the dike seepage control project to be applied. Yilan County Songcheng City embankment 1 +90 0 ~ 2 +50 0 cutoff wall project in the province for the first time the application of this