重力式码头沉箱水下修复技术  

Underwater restoration technology for gravity quay caisson

作　　者：潘晓军[1] 黄汉明[1] PAN Xiaojun;HUANG Hanming(CCCC-FHDI-Engineering Co.,Ltd.,Guangzhou 510290,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510290

出　　处：《水运工程》2024年第8期329-332,337,共5页Port & Waterway Engineering

摘　　要：对已建码头的加固改造,实现码头质量安全水平的有效提升,可推动基础设施的集约利用。本文以海南某已服役多年的3.5万吨级散货码头项目为例,对主体沉箱结构破损的加固实践研究,提出水下修复的解决方案。研究结果表明:1)通过水下摄像及探摸,可准确判断沉箱损坏情况;2)对于沉箱壁碎裂、钢筋裸露锈蚀严重或断裂的现象,可先采用高压水冲洗或凿槽切除处理,然后支立模板与浇筑高强灌浆料,并采用水下包覆层材料对沉箱壁进行修补;3)对于沉箱内填料部分掉落的现象,可在沉箱仓格内整体浇筑水下不分散混凝土。经现场试验检测,该施工修复技术满足设计要求,且归纳总结了相应的质量控制要点及水下作业安全管理要求,旨在为类似工程提供参考。The reinforcement and renovation of the existing wharfs can effectively improve the quality and safety level of the wharfs,and promote the intensive utilization of infrastructure.Taking a 35,000-ton bulk cargo terminal project that has been in service for many years in Hainan as an example,this paper studies the reinforcement practice of the main caisson structure damage,and puts forward the solution for underwater repair.The results show that:1)the damage condition of caisson can be accurately judged by detailed underwater photography and exploration.2)For the phenomenon of caisson wall breakage and serious bare rust or fracture of steel bars,high pressure water flushing or gouging can be treated first,and then the formwork and high-strength grouting material are supported,and the underwater coating material is used to repair the caisson wall.3)For the phenomenon that the packing part in the caisson drops,the underwater non-dispersed concrete can be poured in the caisson compartment as a whole.The field test shows that the construction repair technology meets the design requirements,and the corresponding quality control points and underwater operation safety management requirements are summarized,aiming to provide reference for similar projects.

关 键 词：重力式码头 裂缝 水下修补 水下不分散混凝土 

分 类 号：U65[交通运输工程—港口、海岸及近海工程]