Sliding type installation method and system for offshore electric platform

Abstract

The invention belongs to the field of ocean engineering, particularly belongs to the field of offshore wind power development, and particularly relates to sliding type installation method and system for an offshore electric platform. The sliding type installation method and the system for the offshore electric platform have the following beneficial effects that (1) the application range is wide, ultra-large type ocean platforms at very shallow water depth can be installed, the limitation requirements on a transportation barge, an upper module and a lower module are less besides the necessary support structure bearing capacity requirement, a classic structure style and a layout plan of the platform do not need to be changed, the selecting surface for engineering optimization is widened, andthe construction period and the work amount can be effectively controlled; (2) the butt joint of the upper module and the lower module of the offshore platform can be operated stably, accurately andcontrollably with the help of a track and a self-propelled modular trailer (SPMT) set, the problems of collision and inclination probably occurred in a hoisting method or a floating-supporting methodare avoided, and a butt-joint buffer device at a pile connecting part has no need to be arranged; and (3) various steps are conveniently constructed and simply operated, and the remarkable engineeringeconomic benefit is achieved.

Description

technical field [0001] The invention belongs to the field of marine engineering, in particular to the field of offshore wind power development, and in particular relates to a sliding installation method and system for an offshore electrical platform. Background technique [0002] With the deepening of ocean development, more and more offshore platforms are put into use. In most engineering projects, the installation process of the platform is one of the decisive factors that determine the economics of the project, and it also has an important impact on the structural type. The conventional installation method of the offshore platform is to use the floating crane transport barge to hoist the upper module and place it on the pre-constructed lower foundation structure (such as jacket, high pile cap, etc.), the related technology is relatively mature, but the hoisting method The application has the following limitations: [0003] 1) Large-scale floating crane transport barges ...

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Problems solved by technology

[0003] 1) Large-scale floating crane transport barges have a large draft, and there is a risk of bottoming out in small water depths, which cannot be applied to offshore platform installations in tidal flats or extremely shallow waters;

[0004] 2) At present, the maximum lifting weight of most floating crane transport barges in the world does not exceed 10,000 tons, which cannot meet the hoisting safety requirements of super large oil and gas platforms and offshore converter stations and other offshore platforms with a capacity of more than 10,000 tons;

[0005] 3) The current floating crane resources and window period are very tight to the demand of the project to be built, which cannot meet the construction period and economic requirements of large-scale marine development

In terms of installation technology of offshore electrical platforms: In the case of the above 1), the prior art can adopt the structural type of modular offshore booster station (patent publication No. Low floating crane resources, but this technology cannot solve the situation where the site is located in extremely shallow water depth or tidal flat conditions, and the block structure is inferior to the monolithic structure in terms of bearing performance and construction technology; in the case of 2), the existing The technical solution is to use the float-over method (patent publication No. CN109056684A) for installation, but the barge resources that can be used for float-over installation are also limited, and in the related technology, the slotting of the foundation support and the collision buffer during the connection of the upper and lower blocks All have special requirements, and the project design cycle and engineering volume are higher than those of the hoisting scheme

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