Offshore wind power multi-barrel jacket foundation installation and recovery method

Abstract

The invention belongs to the technical field of offshore wind power construction, and discloses an offshore wind power multi-barrel jacket foundation installation and recovery method. After a plurality of multi-barrel jacket foundations are transported to an installation sea area by using an integrated transportation and installation ship, the plurality of multi-barrel jacket foundations are directly installed and / or recovered through the integrated transportation and installation ship, each suction barrel of the multi-barrel jacket foundations is provided with an independent hanging cable, and the lowering and / or jacking speed of the multi-barrel jacket foundations is controlled; and the suction barrels are kept in an air-tight state in the sinking and / or recovery process of the multi-barrel jacket foundations, certain buoyancy is provided for the multi-barrel jacket foundations, and the buoyancy can be adjusted by inflating or deflating the suction barrels so as to control the tension of each hanging cable, so that the tension of the hanging cables is always controlled within a certain safety range. Therefore, large hoisting equipment such as a crane is not needed, the offshore construction operation time is shortened, the offshore construction operation cost is reduced, and the safety and stability of the installation and recovery process are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of offshore wind power construction, and in particular relates to a method for installing and recovering the foundation of a multi-tube jacket for offshore wind power. Background technique [0002] At present, in the field of offshore wind power generation, the multi-tube jacket foundation, as a new type of offshore wind turbine foundation, has the advantages of light weight, high structural strength, strong bearing capacity, less impact on waves and currents, simple construction, and recyclability. [0003] The traditional installation method is to transport the basic structure and the upper fan to the installation site and install them step by step. This installation method takes a long time for offshore construction and is greatly affected by natural conditions such as weather and sea conditions, so the construction is difficult; at the same time The step-by-step installation requires large-scale hoisting...

AI Technical Summary

Problems solved by technology

[0003] The traditional installation method is to transport the basic structure and the upper wind turbine to the installation site for step-by-step installation. This installation method takes a long time for offshore construction and is greatly affected by natural conditions such as weather and sea conditions, so the construction is more difficult; at the same time Step-by-step installation requires large-scale hoisting equipment such as cranes, which has high requirements on the carrying capacity of the transport ship, and the use of hoisting equipment also increases the installation cost

In addition, the cable tension during the lowering of the multi-tube jacket foundation is also a problem that needs to be paid attention to. If the cable tension cannot be controlled at all times, it may happen that the cable tension exceeds its strength and the cable breaks, or the cable tension is too high. Small lead to decoupling, resulting in engineering accidents; in addition, due to the difference in geology, the traditional suction cylinder is prone to the situation that the sinking is not in place during the sinking process, and at the same time, it is necessary to pay attention to the buckling problem of the cylinder

[0004] When recovering the multi-tube jacket foundation, due to the large overall size and weight of the multi-tube jacket foundation, the required lifting height is also high. There is a problem with the control of the tension of the suspension cable, and safety accidents such as rope breakage or decoupling are prone to occur

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