Method for preventing buckle propagation and inhibiting vortex-induced vibration of benthal pipeline

Abstract

The invention belongs to the technical field of paving benthal pipeline facility and relates to a method for preventing buckle propagation and inhibiting vortex-induced vibration of a benthal pipeline. According to the dimensions of an outside diameter and the wall thickness of the benthal pipeline, the method manufactures a plurality of pairs of variable-section and semicircular shells with the same dimensions and structures; the size of an inside diameter of each shell is equal to that of the outside diameter of the benthal pipeline; the outside diameter is changed along the axial direction and makes transition through a bevel; two ends of each shell are thick; the middle part is thin; the outer surface of the middle part of each shell is fixed with a spiral lateral plate and provided with an extended ocular plate; after one pair of the shells is connected to form a variable-section circular column, the spiral lateral plates in the middle parts of the shells are mutually coincided to form the same spiral structure to form a buckle arrestor; and one buckle arrestor is arranged in the radial direction of the benthal pipeline at intervals of a certain distance in the following method. The method can reduce cost, effectively controls the buckle propagation and vortex-induced vibration of the benthal pipeline and realizes the unification of economy and safety.

Description

Technical field [0001] The invention belongs to the technical field of laying of submarine pipeline facilities, and specifically relates to a method capable of preventing buckling propagation of submarine pipelines and suppressing vortex-induced vibration. Background technique [0002] In the process of laying submarine pipelines at sea, there is usually a long suspension span between the pipe-laying vessel and the seabed. The length of the suspension span is not only related to the depth of the water, but also affected by the construction load and various complex environments. During the pipeline laying process, certain obstacles will cause excessive bending and deformation of the pipeline; after the pipeline is laid, local buckling will also occur due to the collision of falling objects such as anchors and other external forces such as the seabed. Once this kind of local buckling occurs, it is easy to spread quickly along the longitudinal direction of the pipeline due to the ac...

AI Technical Summary

Problems solved by technology

At present, there is no device that can prevent buckling propagation and suppress vortex-induced vibration in one

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