江心滩大型无底钢套箱设计与施工技术

Design and Construction Techniques for Bottomless Huge Steel Boxed Cofferdam Used at Mid-River Shoal

结合南昌生米大桥江心滩套箱的设计与施工,介绍大型单壁无底钢套箱的设计,对其中的导向架、内支撑转换、套箱下沉与封底的施工难点进行了重点分析。

With reference to the design and construction of steel boxed cofferdam used at mid river shoal for the Shengmi Bridge in Nanchang, this paper presents the design process of the single-wall, bottomless huge steel boxed cofferdam, and analyzes in details the construction difficulties of changing of the guiding trusses, internal bracings, sinking and bottom sealing of the col ferdam.