深水高桩承台有底钢套箱施工方案探讨  

Discussion on the Construction Scheme of Steel Boxed Cofferdam with Bottom for High Pile Cap in Deep Water

作　　者：卢玲霞 LU Lingxia

机构地区：[1]广东冠粤路桥有限公司,广东广州511400

出　　处：《上海公路》2023年第3期93-98,M0006,共7页Shanghai Highways

摘　　要：依托省道S255线博罗东江大桥改扩建项目为工程背景,介绍了一种深水环境中的高桩承台施工的有底套箱结构,套箱底板和底梁均采用预制钢筋混凝土结构。完成第一次封底混凝土施工后,进行抽水,并在桩基钢护筒上焊接承重牛腿,将承台主体结构浇筑时的受力系统由悬吊系统转换为承重牛腿。对此类套箱结构施工工艺的控制要点进行了较为详细的介绍,可为同类承台施工提供参考。Based on the Boluo-Dongjiang Bridge reconstruction and expansion project of provincial highway-S255 as the background,this paper introduced the construction process of a steel boxed cofferdam with bottom for high pile cap in deep-water environment.The bottom plate and bottom beam of the casing are made of precast reinforced concrete.When the first stage of concrete pouring is complete,weld the bearing bracket on the pile steel casing,for the sake of convert the stress of the main structure of the cushion cap from the suspension system to the bearing bracket.The control points of the casing structure construction process are introduced in detail,which provides reference for similar pile construction.

关 键 词：深水高桩承台 有底钢套箱 预制底梁和底板 受力体系转换 承重牛腿 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]