Anti-liquefaction assembled marine suction foundation structure and its construction method

Abstract

The invention discloses an anti-liquefaction fabricated ocean suction type foundation structure and a construction method thereof. The anti-liquefaction fabricated ocean suction type foundation structure comprises a first barrel structure and a plurality of second cylinder structures. The top and the bottom of the first barrel structure are open, the bottom of the first barrel structure is sharp,and a clamping groove is formed in the top of the first barrel structure; the top and the bottom of each second barrel structure are open, a clamping groove is respectively formed in the bottom and the top of each second barrel structure, and the plurality of second barrel structures are sequentially connected together in a clamped mode from top to bottom; the first barrel structure is located atthe bottommost end of the suction type foundation structure, the top of the first barrel structure is connected with the bottom of the second barrel structure located at the bottommost portion in a clamped mode, and the second barrel structure located at the uppermost portion is connected with a round steel board; and damping devices used for connecting the adjacent cylinder structures are arranged at the clamping positions of the adjacent cylinder structures.

Description

technical field [0001] The invention relates to the technical fields of geotechnical engineering and marine engineering, in particular to building marine mining platforms in liquefied strata such as marine soft clay or sandy soil, and provides a novel marine suction foundation structure. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The suction foundation structure is a large-diameter steel drum structure with an open bottom and a closed top. It has the advantages of low cost and reusability. It is more and more used in deepwater offshore platform engineering. However, the inventor found that due to the large volume of the marine suction foundation structure, the transportation and installation are relatively complicated; The inhomogeneity of clay or sandy soil causes air in the large-volume suction foundation structure, which cannot meet the re...

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Problems solved by technology

However, the inventor found that due to the large volume of the marine suction foundation structure, the transportation and installation are relatively complicated; at the same time, the large-volume suction foundation structure sinks into the seabed under the action of the internal and external pressure difference during the on-site installation process. The inhomogeneity of clay or sandy soil causes air in the large-volume suction foundation structure, which cannot meet the requirements of the suction foundation structure sinking into the seabed. This will cause instability and safety hazards in the suction foundation structure, and easily cause the upper ocean mining platform to capsize Deformation, thus endangering the safety of construction personnel and damaging production equipment

In addition, the construction process of the large-volume suction foundation structure requires a lot of manpower, equipment and financial resources, and at the same time increases the construction risk.

At the same time, under the action of dynamic loads such as earthquakes or waves, the loose seabed soil layer often undergoes deformation of the soil layer structure, and part or all of the soil loses its strength and bearing capacity, and liquefaction occurs, which in turn causes the structures on the upper part of the ocean foundation to generate strong damage. Uneven settlement or even overturning, causing great harm

[0004] With the continuous development of China's marine resources to the deep sea, the traditional marine suction infrastructure can no longer guarantee the rapid and efficient development of marine resources, which restricts the development and application of suction infrastructure

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