近年来,国外运用防渗墙的菹围正在扩大,其施工方法也不断得到改进。最初的防渗墙,是用混凝土或水泥砂浆作材料制成的刚性防渗墙,它在外力作用下容易产生裂缝,一旦发生渗漏,要修复几乎不可能,同时要防止防渗墙联接部份漏水也很困难。因此,近来国外都在发展用土(或土与水泥混合)作防渗材料的塑性墙。这种塑性防渗墙不易裂,且成本低,因而很快在世界上被推广使用。关于防渗墙的施工方法,目前国外采用最多的是 In recent years, the use of impervious walls abroad is expanding and its construction methods are continuously being improved. The initial cut-off wall is a rigid cut-off wall made of concrete or cement mortar. It is prone to crack under the action of external force. In the event of seepage, it is almost impossible to repair it. At the same time, the cut-off wall joint It is also very difficult to leak water. Therefore, plastic walls that use soil (or a mixture of soil and cement) as impervious materials have recently been developed abroad. This plastic cut-off wall is not fragile, and the cost is low, so it is quickly being used in the world. About cut-off wall construction methods, currently used most is