某海上自升式移动平台桩腿的修复

Repair of Offshore Jack-up Mobile Unit Legs

海上自升式移动平台长期在高盐高湿和恶劣海况下服役,平台桩腿桩靴等部位长期承受预压载、拔桩、波浪、潮汐、风等交变载荷,容易出现结构隐患。本文通过对国内某自升式钻井平台0BAY以下桩腿更换过程的分析,阐述了桩腿修复建模校核、施工中相对位置公差控制、关键数据测绘、过程中定位及焊接质量控制等技术和质控要点,为同类型项目提供技术经验和实践参考。

Offshore jack-up mobile unit has been in service under high salt and humidity and harsh sea conditions for a long time,legs,shoes and other parts of the platform are prone to structural risks because they bear the alternating loads such as pre-ballast,leg extracting,wave,tide and wind for a long time.This paper analyzes the replacement process of legs below 0BAY of the jack-up drilling platform in first service in China,expounds the technical and quality control points,such as repair modeling check,relative position tolerance control in construction,key data mapping,positioning in the process and welding quality control,providing technical experience and practical reference for similar projects.