Deep sea combined cylinder foundation structure and construction method thereof

Abstract

The invention belongs to the technical field of anchoring structures in ocean engineering, and relates to a deep sea combined cylinder foundation structure and a construction method thereof. The combined cylinder foundation form comprises three suction type cylinder foundations, wherein the three suction type cylinder foundations are distributed in a triangular shape, the distance between the cylinder foundations is larger than 1.5 times of the cylinder diameter, and the cylinder foundations are converged at a certain height in a deep sea through a flexible anchor chain; the matched construction and installation device comprises a positioning steel pipe, a connecting plate and an underwater robot. The construction and installation method comprises the steps of connection of an offshore cylinder type foundation and an auxiliary installation device, overall putting into mud, real-time orientation monitoring, negative pressure installation of the cylinder type foundation and recovery of the auxiliary installation device. The overall bearing performance of the foundation can be improved and increased, the anchor group effect of the combined cylinder foundation can be brought into play to a greater extent, the combined cylinder foundation is suitable for deeper and worse marine environments, the geometric dimension of the suction type cylinder foundation tends to be more reasonable, the weight is lighter, the construction difficulty is lower, the transportation is more convenient, and the installation and recycling construction difficulty is reduced.

Description

technical field [0001] The invention belongs to the technical field of foundation structures of marine engineering, and in particular relates to a novel suction combined cylinder foundation anchoring type for a deep-sea oil and gas exploitation platform and a deep-sea oil storage device. Background technique [0002] In recent years, the development and utilization of marine resources has gradually moved towards the deep sea. With the development of deep-sea floating platforms, traditional drag anchors, gravity anchors and driven piles have technical difficulties in deep-water installation and cable-stay resistance. Due to poor mooring performance and other reasons, the traditional foundation type is restricted by environmental and other factors and cannot meet its anchoring requirements. Compared with the traditional foundation type, the suction cylinder foundation has been used as an excellent foundation due to its advantages of fast installation speed, low construction co...

AI Technical Summary

Problems solved by technology

These characteristics determine that the seabed soil in the deep water area of ​​the South China Sea has different mechanical properties from those in the near-shallow sea. It is characterized by low strength, poor permeability, and strong structure, which brings great difficulties to the construction of deep-sea platforms and deep-sea floating structures.

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