Hierarchical synchronous hydraulic jacking process for large-tonnage ocean engineering structure

Abstract

The invention discloses a hierarchical synchronous hydraulic jacking process for a large-tonnage ocean engineering structure. The process comprises the following steps of: 1, arranging a plurality of hydraulic jacks and a plurality of temporary protective supports below the structure and connecting a synchronous oil pump with the hydraulic jacks by using oil pipes; 2, controlling the plurality ofhydraulic jacks to simultaneously jack an oil cylinder through the synchronous oil pump; 3, arranging cushion blocks below the plurality of temporary supports; 4, arranging cushion blocks below the hydraulic jacks; 5, retracting the hydraulic jacks into the oil cylinder; 6, arranging the cushion blocks below the hydraulic jacks again; 7, repeating the steps 2 to 6 until the structure is jacked toa proper height; and 8, jacking the structure to remove the cushion blocks below the temporary supports after a transport vehicle enters the structure, and connecting the temporary supports of the same height below the structure. The process has lower requirement on space around the large-tonnage ocean engineering structure; the site utilization ratio is improved; meanwhile, the lifting cost of the large-tonnage ocean engineering structure is reduced; and the construction period of the large-tonnage ocean engineering structure is shortened.

Description

Technical field [0001] The invention relates to a process for lifting large-tonnage structures, in particular to a process for grading and synchronous hydraulic lifting of large-tonnage marine engineering structures. It belongs to the field of offshore oil engineering. Background technique [0002] In offshore oil development projects, various platforms such as oil production platforms, living platforms, and central processing platforms need to be built offshore. The platform generally mainly includes: offshore engineering blocks, underwater supporting structures-jackets, single points and other offshore engineering structures. These marine engineering structures are generally prefabricated on land, and then transported to sea for installation. In the process of prefabrication and installation of these marine engineering structures, hoisting operations are usually adopted. [0003] With the rapid development of ocean engineering construction, the volume and weight of ocean engin...

AI Technical Summary

Problems solved by technology

[0004] 1. Crane resources are relatively tight, and the cost of using cranes is high;

[0005] 2. The crane hoisting efficiency is low, which increases the construction period of the deck piece and increases the construction cost;

[0006] 3. The movement of the crane requires a certain space, and there are certain requirements for the space around large-tonnage structures, which reduces the utilization rate of the site;

[0007] 4. The hoisting of the crane is affected by the uncertain factors of the center of gravity, and there are certain potential safety hazards

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