高速铁路桥梁薄涂型聚氨酯防水层施工技术研究

Construction Technology Research on Thin-coated Polyurethane Waterproofing Layer in High-speed Railway Bridge

随着高速铁路的快速发展,传统的高聚物改性沥青卷材铺装防水层逐步被薄涂型聚氨酯涂料所代替,弥补了防水卷材在外界环境因素引发的各种病害。本文以跨荣潍高速公路特大桥防水层施工为例,从防水层的基面处理、封闭层、底面层、表面层的施工及现场验收进行了阐述,对以后防水层施工提供了参考依据。

With the rapid development of high-speed railway, the traditional polymer modified bitumen membrane pavement waterproofing layer is gradually replaced by thin-coated polyurethane coating, making up the waterproofing membrane from suffering a variety of diseases caused by the external environment. In this paper, taking the waterproofing layer construction of Rong-Wei Expressway Bridge as an example, the base surface treatment for the waterproofing layer, the construction of the closure layer, the bottom layer and the surface layer as well as site acceptance were described. It could be served as a reference for the construction of future waterproofing layers.