深水浅覆盖层锁扣钢管桩围堰关键技术研究及应用  

Key technology and application of locking steel pipe pile cofferdam in deep waters with shallow overburden

作　　者：张宏武 穆清君[2] 陈卓异 杨武 ZHANG Hong-wu;MU Qing-jun;CHEN Zhuo-yi;YANG Wu(CCCC(Changsha)Construction Co.,Ltd.,Changsha,Hunan 410200,China;CCCC Second Harbor Engineering Co.,Ltd.No.5 Branch,Wuhan,Hubei 430040,China;School of Civil Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China)

机构地区：[1]中交(长沙)建设有限公司,湖南长沙410200 [2]中交第二航务工程局有限公司第五工程分公司,湖北武汉430040 [3]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《中国港湾建设》2023年第7期55-60,共6页China Harbour Engineering

基　　金：国家自然科学基金(51708047)。

摘　　要：深水浅覆盖层围堰成形难度大,施工风险高,依托香炉洲大桥31号墩基础施工,提出刻槽+锁扣钢管桩围堰工艺。利用有限元软件对围堰结构进行施工阶段分析,计算结果表明各施工阶段围堰的强度、刚度及稳定性均满足规范设计指标,并对围堰刻槽、槽内吹砂、混凝土止水墙及“先支法”施工关键技术进行研究,确保该围堰顺利实施。现场实践效果表明该工艺在深水浅覆盖层承台施工过程中安全可靠,风险可控。It is difficult to build cofferdams in deep waters with shallow overburden and with high risks.Based on the construction of pier No.31 of Xiangluzhou Bridge,a notching+locking steel pipe pile process is proposed to build the cofferdam.Finite element software was used to analyze the cofferdam structure in various construction stages and the calculation results showed that the strength,stiffness and stability of the cofferdam in each construction stage met the design objectives specified in the design criteria.The key technologies for notching in the cofferdam,sand filling in the notched groove,concrete water stop wall and“pre-shoring method”are studied to ensure the smooth implementation of the cofferdam.The result of field practice shows that the process is safe and reliable in construction of pile caps in deep waters with shallow overburden and the risk is controllable.

关 键 词：深水 浅覆盖层 桥梁基础 刻槽 锁扣钢管桩围堰 

分 类 号：U655.541[交通运输工程—港口、海岸及近海工程] U445.556[交通运输工程—船舶与海洋工程]