摘要
某风场升压站恢复工程涉及到钢桩基础水下高精度切割及新导管架水下对接指引2项施工工艺,该工程作业水深20 m,钢桩规格φ2600 mm×50 mm,施工重点为钢桩切割的水平度控制和四根钢桩的相对高程控制。针对该作业环节的高精度要求,设计水下可调平切割工装,匹配高压水切割工艺进行高水平度切割作业,并使用对接指引系统完成导管架插尖水下与钢桩对接作业。研究表明:水下可调平工装设计结构简单,在此次项目中有较高的实用性,满足了钢桩基础水下切割的水平度要求及4根钢桩相对高差的要求,保证了切割作业的精度。对接指引系统辅助导管架平稳下放,插尖精准地插入钢管桩空腔,高质高效地完成了施工作业。该施工最终切割精度达到单桩桩口水平度≤1%,4根钢桩相对高程<50 mm,插尖中心位置与设计值仅偏差5 cm,远小于20 cm的允许误差,新导管架安装后水平度为0.66‰。
The restoration of a wind farm booster station involves underwater cutting of steel pile foundation and underwater docking of new conduit frame.The operating water depth of this project is 20 m,and the steel pile specification isφ2600 mm×50 mm.The focus is on controlling the level of steel pile cutting and the relative elevation of the four steel piles.Aiming at the goal of this operation,an underwater adjustable leveling cutting tool is designed to match the abrasive water jet cutting process for high-level cutting operations.The insertion tip of conduit frame is connected with the steel pile under water using a docking guide system,and it completes the operation smoothly.The research shows that,the leveling tooling structure is simple and has high practicability in this project.It solves the levelness requirements of the steel pile foundation underwater cutting and the relative height difference requirements of the four steel piles,and ensures the accuracy of cutting operations.The docking guidance system assists the jacket to be lowered smoothly,and the insertion tip is accurately inserted into the cavity of the steel pile.The final cutting accuracy reach a single pile level≤1%,the relative elevation of the four steel piles is<50 mm.The center position of the insertion tip is only 5 cm away from the design value,which is far less than the allowable error of 20 cm,the level of the new conduit frame after installation is 0.66‰.
作者
张伟
田宝涛
张作涌
刘晶晶
ZHANG Wei;TIAN Baotao;ZHANG Zuoyong;LIU Jingjing(China Yantai Salvage Technology Department,Yantai 264012,Shandong,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China;Shipbuilding Technology Research Institute,Shanghai 200032,China)
出处
《船舶工程》
CSCD
北大核心
2022年第S01期159-165,共7页
Ship Engineering
关键词
水下切割
切割精度
桩顶水平度
对接引导系统
underwater cutting
cutting precision
pile top levelness
docking guidance system
