Construction process for lifting leg pile of offshore living platform

Abstract

The invention relates to a construction process for a lifting leg pile of an offshore living platform. The construction process is characterized by comprising the following steps of joint pipe manufacturing, unit section butt joint, segment butt joint, T-shaped frame assembly and welding, external web plate assembly and welding, pile leg cylinder curved surface hole making and sealing, sand blasting coating and pile insertion assembly. According to the construction process, each pile leg segment is of a cylinder structure, a plurality of cylinder segments are spliced and assembled into a segment, the construction efficiency is improved, and the construction cost is reduced; vertical reinforcing ribs and T-shaped reinforcing rings play the roles of longitudinal and transverse fixing and reinforcing, structural pipes play the role of transverse reinforcing in cylinders, and the strength of a pile leg structure is ensured; and the construction accuracy of a rack plate is improved by restricting the main indexes such as straightness, tooth spacing and common normal spacing of the rack plate, so that the support and stability of the pile leg are improved, and welding deformation or weldcracking is avoided.

Description

technical field [0001] The invention relates to the field of leg pile construction, in particular to a construction process for lifting leg piles of marine living platforms. Background technique [0002] With the acceleration of the development of offshore wind power energy, the development prospects of wind power installation equipment are becoming more and more broad. Self-elevating and self-propelled offshore drilling platforms, as the necessary equipment for the installation and use of wind power pipe piles, are also in short supply. Naturally, they have become one of the engineering ships that major equipment companies are vying to manufacture. When the self-elevating and self-propelled offshore drilling platform is working, the platform is usually lifted above the ocean surface by a lifting mechanism to protect it from the impact of waves, and it relies on the support of the legs to stand on the sea surface for drilling work. After the drilling task is completed, it is...

AI Technical Summary

Problems solved by technology

Application No. 201610013969.1 discloses a construction process for jack-up wind power ship legs, including four process steps: shell rolling, welding between shells, workshop pre-assembly, and pin hole cutting. The leg design requires very high strength. At the same time, it is required to reduce its own weight as much as possible, so the high-strength steel plate of E690 material with a thickness of 70mm is used to make a cylinder with a diameter of only 3600mm, which has the advantages of improving construction efficiency and reducing construction costs, but this patent lacks the welding process of rack plates Steps, so the support and stability of the legs are poor, which is easy to cause welding deformation or weld cracking

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