大型渠道衬砌板水下不分散混凝土施工技术

Construction Technology of Underwater Undispersed Concrete for Lining Plate of Large Channel

南水北调中线工程是一项跨流域的长距离特大型调水工程,自2014年通水以来,已成为沿线大中城市供水新的生命线,因此不停水对渠道衬砌板修复施工是急需解决的技术难题。文章以南水北调中线工程某辖区渠道衬砌板水下不分散混凝土修复施工实践为例,主要从水下不分散混凝土施工工艺流程、混凝土浇筑分层、轨道加工及安装、模板安装、水下不分散混凝土浇筑等五方面进行了介绍了水下不分散混凝土浇筑施工技术,旨在介绍探索创新后新的施工技术应用,为后续南水北调工程高质量发展提供技术保障措施,为类似工程提供技术参考。

The Middle Route Project of South-to-North Water Diversion Project is a long-distance and super-large water diversion project across river basins.Since the water supply was opened in 2014,it has become a new lifeline for water supply for large and medium-sized cities along the line.Therefore,the repair construction of channel lining plate without water supply interruption is an urgent technical problem to be solved.The construction practice of repairing the underwater undispersed concrete of the channel lining plate in a certain area of the Middle Route Project of the South-to-North Water Diversion is taken as an example,the construction technology of underwater undispersed concrete pouring is introduced mainly from five aspects of the underwater undispersed concrete construction process,the concrete pouring layering,the track processing and installation,the formwork installation and the underwater undispersed concrete pouring.The purpose of this paper is to introduce the application of new construction technology after exploration and innovation,which provides technical guarantee measures for the high-quality development of the follow-up South-to-North Water Diversion Project and technical reference for similar projects.