六景郁江特大桥双壁钢围堰施工关键技术

KEY CONSTRUCTION TECHNOLOGY OF DOUBLE WALL STEEL COFFERDAM OF LIUJING YUJIANG BRIDGE

六景郁江特大桥主桥P3、P4号墩采用矩形双壁钢围堰进行基础施工,现场水文地质复杂,施工场地不足,为保障工期及工效,P4号墩围堰采用门式起重机在浮箱平台上拼装完成后吊至设计墩位,P3号墩围堰在浮箱平台拼装后采用驳船浮运至设计位置后采用导向装置实现围堰精准定位下沉,解决了施工场地不足的不便影响,保障了工期及工效。

Pier P3 and Pier P4 of the main bridge of Liujing Yujiang Bridge adopted rectangular doublewall steel cofferdam for foundation construction.The site hydrogeology is complicated and the construction site is insufficient.In order to ensure the construction period and efficiency,pier P4 cofferdam was assembled on the floating box platform by longmen crane and then lifted to the designed pier.After assembling the floating box platform,the cofferdam of No.P3 pier is transported to the designed location by barge,and then the cofferdam is accurately positioned and sunk by guiding device,which solves the inconvenience caused by insufficient construction site and ensures the construction period and efficiency.