消浪孔沉箱的开孔封堵、溜放与安装施工技术

Construction technique for perforation's plugging and caisson's launching and placing

超大型消浪孔沉箱的建造、移运和安装对于施工设备和技术都是一个很大的挑战。以青岛港董家口港区北一突堤4#泊位工程为例,介绍沉箱消浪孔封堵采用内拉悬挂钢模板封堵工艺,克服了传统封堵方式的不足,实现了"中间隔墙消浪孔不封堵、沉箱候潮安装"的工法;同时介绍消浪孔沉箱在溜放、浮运和安装过程中的计算及施工关键技术。该工程的成功实践,为超大型消浪孔沉箱的移运和安装提供了借鉴。

The manufacture,launching and placing of ultra-large perforated caissons are great challenges for the construction equipment and technique.Taking caissons of berth No.4 on the north pier of Dongjiakou area Qingdao port as an example,this paper presents the perforation plugging technique of suspended steel formwork,which recovers the shortage of conventional plugging methods.With this new technique,perforations on the midfeathers could be left unplugged and caissons can be placed at high tide.Moreover,the paper introduces the calculation and key construction technique in the launching and placing process of perforated caissons.The successful practice of the project provides a reference for the launching and placing process of ultra-large perforated caissons.