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几年来,地下防水渗漏问题一直没有根治,特别是在施工缝处理上,存在一些问题。混凝土自防水在施工缝中出现渗漏的情况较多。下面介绍一种混凝土自防水施工中在施工缝处外加柔性防水层的施工方法。首先在外部混凝土施工缝处吹扫,吹扫面包括缝上、下各250毫米,修补凹、凸处,剔除松动混凝土,使施工面平整。待墙干燥后,涂刷冷底子油,然后做柔性防水层。见图1。这种做法在天津火车站地下人防工程施工中应用,效果较好。
In the past few years, underground waterproof seepage has not been eradicated, and there have been some problems in construction joint processing. Concrete self-water leakage occurs in construction joints in many cases. The following describes a construction method for applying a flexible waterproof layer at a construction joint in a self-waterproof construction of concrete. First of all, in the external concrete construction joints, the purging surface consists of sew up and down 250 mm each, repairing the concaves and convexes, removing the loose concrete, and smoothing the construction surface. After the wall is dry, apply cold base oil and then make a flexible waterproof layer. see picture 1. This practice is applied in the underground civil defense project construction of Tianjin Railway Station, and the effect is better.