深水基础浅覆盖层锁扣钢管桩围堰施工技术  

CONSTRUCTION TECHNOLOGY FOR LOCKING STEEL PIPE PILE COFFERDAMS IN DEEP WATER FOUNDATIONS WITH THIN OVERBURDEN LAYERS

作　　者：刘治 邹波 王飘 LIU Zhi;ZOU Bo;WANG Piao(China Railway Construction Bridge Engineering Bureau Group First Engineering Co.,Ltd.,Liaoning Dalian 116021,China;Nanchang Construction Engineering Comprehensive Supervision Affairs Center,Nanchang 330000,China)

机构地区：[1]中铁建大桥工程局集团第一工程有限公司,辽宁大连116021 [2]南昌市建设工程综合监督事务中心,南昌330000

出　　处：《低温建筑技术》2024年第12期111-114,共4页Low Temperature Architecture Technology

基　　金：中国铁建大桥工程局集团公司有限公司2021年度科技研究开发计划(DQJ-2021-B03)。

摘　　要：针对深水浅覆盖层钢管桩插打困难,钢管桩锁扣入岩困难且容易损伤,钢管桩内封底混凝土外翻困难,钢管桩围堰渗漏不易控制等难题,文中结合南昌市复兴大桥施工,通过研究深水浅覆盖层基础锁扣钢管桩围堰施工技术,分析各关键施工工序,得出钢管桩内引孔,钢管桩复打前采用定制的扩孔钻头扩孔,调整封底混凝土施工顺序,利用地下连续墙原理进行止水等施工方法,提高了施工质量,加快了施工进度,节约了施工成本。相关研究结论可为类似工程提供借鉴。To address challenges such as difficulty in driving steel pipe piles in deep water with thin overburden layers,challenges in locking steel pipe piles into bedrock without damage,difficulties in preventing bottom-sealing concrete from overturning,and challenges in controlling leakage in steel pipe pile cofferdams,this study examines the construction techniques for foundation locking steel pipe pile cofferdams in deep water and thin overburden conditions,based on the construction of the Fuxing Bridge in Nanchang.By analyzing key construction procedures,the study proposes methods such as pre-drilling within the steel pipe piles,using custom reaming drill bits before re-driving the piles,adjusting the construction sequence for bottom-sealing concrete,and employing water-stopping techniques based on the diaphragm wall principle.These methods enhance construction quality,accelerate progress,and reduce costs.The findings provide valuable references for similar engineering projects.

关 键 词：深水浅覆盖层 锁扣钢管桩围堰 扩孔钻头 封底混凝土 

分 类 号：TU753[建筑科学—建筑技术科学]