A sliding installation method and system for an offshore electrical platform

Abstract

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 electric platform. It has the following beneficial effects: 1) It has a wide range of applications and can be used for the installation of extremely shallow water depths and super large offshore platforms. In addition to the necessary support structure bearing capacity requirements, there are more restrictive requirements for transport barges, upper modules and lower modules. Less, the classic structural type and layout plan of the platform do not need to be changed, the selection of engineering optimization is broadened, and the construction period and engineering quantity can be effectively controlled. 2) The docking of the upper block and the lower block of the offshore platform can be operated smoothly, accurately and controllably with the help of the track and the SPMT train group, avoiding the collision and tilt problems that may occur in the hoisting method or float-over method. Then set the docking buffer device at the pile connection. 3) The construction of each step is convenient, the operation is simple, and it has significant engineering economic benefits.

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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