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中国最长预应力渡槽安装长度达2700米

2018-01-04 17:49:07   中国新闻网

中新网武汉1月4日电 (梁婷 张强)记者4日从湖北省水利厅获悉,作为鄂北地区水资源配置工程中规模最大、技术难度最高的控制性工程之一,孟楼渡槽安装长度已达到2700米,超额完成2017年任务。

据悉,孟楼渡槽工程位于湖北省老河口市,总长4.99公里,是中国最长的预应力渡槽;其槽身单跨30米,重量达1200吨,是目前中国单跨过水断面最大、单跨重量最大的预制矩形输水渡槽。

孟楼渡槽工程主要为输水建筑物结构的水利工程,工程呈线性布置。该工程结构复杂,渡槽预制施工工序多达35种,且工艺复杂。

据介绍,为加快施工速度,渡槽钢筋安装在专用钢筋绑扎台座安装成型,采用整体钢筋无变形吊装工艺将渡槽整体钢筋吊入钢筋预制台座;渡槽混凝土养护采用蒸气养护方式大量节省混凝土养护时间,使混凝土强度迅速提高。

槽身段是此次工程最重要的施工部位,也是施工的重点和难点。为保证质量,工人们轮班日夜施工。目前,该工程已完成槽身架设90榀,槽身浇筑113榀,超额完成2017年任务,为实现工程完工目标打下坚实基础。

同时,孟楼渡槽单次吊装重量达1200吨,是继南水北调中线工程中沙河大型渡槽之后又一大型预制吊装架设渡槽。

鄂北水资源配置工程是国家“十三五”重点工程,投资180亿元,全长269.67公里,将于2019年底全线通水。作为湖北省自主建设的投资规模最大、覆盖面积最广、受惠人口最多的工程,鄂北地区水资源配置工程将从根本上解决鄂北地区缺水干旱问题。(完)

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