一、前言 大瑶山隧道采用复式衬砌,即两层衬砌,中间夹防水板,在我国是第一次。现已铺设8km,基本上是成功的,不足之处是出现了漏水现象,在内层模注混凝土一环与下一环的接缝处和锚定点的钉孔处漏水较多(图1),特别是边墙混凝土衬砌1m高的范围内普遍渗水。 I. Introduction Dayaoshan tunnel using double lining, that is, two layers of lining, the middle folder waterproof board, is the first time in our country. Has been laying 8km, basically successful, the downside is the phenomenon of leakage occurred in the inner layer of a ring and the next ring of concrete joints and anchor point nail hole leakage at the more (Figure 1) , Especially in the area of ​​concrete wall lining 1m high seepage generally.