Suction type foundation used on sea-bottom

Abstract

The invention discloses a submarine suction foundation which comprises a barrel shape body. The lateral of the upper end of the barrel shape body is provided with a circular stable disk which is formed into an integrated 'T'-shaped structure together with the barrel shape body. The invention arranges the circular stable disk at the barrel shape body of the suction foundation and presses the stable disk directly onto a soil body surface surrounding the foundation when anchoring the foundation so as to ensure part of the soil body to form an integration more closely with the foundation and to connectively move together with the foundation when the foundation is movably loaded by a horizontal ice force and so on. Therefore, the problems that formerly, as the soil surrounding the barrel foundation gets closer to the barrel foundation, the soil receives bigger disturbance and the softening degree and the liquefaction degree become more and more serious are eliminated; the disturbance brought by the barrel foundation can be more evenly and extensively distributed into the soil surrounding the barrel foundation; the softening degree of the soil body is reduced; the liquefaction of soil mass is eliminated; and thereby the stability of the foundation and the reliability of the anchorage in the submarine soil are guaranteed.

Description

technical field [0001] The invention relates to a suction foundation used on the seabed for fixing marine facilities such as offshore platforms and FPSOs. Background technique [0002] As shown in Figure 1, most of the suction foundations currently used for offshore platforms are barrel foundations, a new offshore platform foundation that emerged in the 1990s. The advantages of low cost and reusability quickly attracted the attention of researchers and oil companies. Since the barrel foundation is inserted in the saturated seabed soil, when dynamic loads such as horizontal ice load, wave load, and earthquake load act on the barrel foundation, it is easy to cause damage to the saturated soil structure around it, making the soil Softening and liquefaction will lead to the reduction or even loss of soil strength. Therefore, this bucket foundation has the defect of poor horizontal dynamic load bearing capacity. Contents of the invention [0003] Aiming at the problems existi...

AI Technical Summary

Problems solved by technology

Since the barrel foundation is inserted in the saturated seabed soil, when dynamic loads such as horizontal ice load, wave load, and earthquake load act on the barrel foundation, it is easy to cause damage to the saturated soil structure around it, making the soil Softening and liquefaction will lead to the reduction or even loss of soil strength, so this kind of bucket foundation has the defect of poor ability to bear horizontal dynamic load

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