Experimental investigation on live-bed scour development and protection of J-tube submarine cable

IF 4 2区工程技术 Q1 ENGINEERING, CIVIL

Marine Structures Pub Date : 2025-03-14 DOI:10.1016/j.marstruc.2025.103807

Yangyang Gao , Peiyuan Zhou , Lizhong Wang , Lingzhi Jiang , Haojun Yang

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引用次数: 0

Abstract

A series of experiments were conducted to investigate the live-bed scour development and protection of J-tube submarine cable under the current-only and current-wave conditions. The local scour development and final equilibrium scour depth around the monopile foundation and submarine cable under different wave and current conditions were analyzed. The results show that the maximum scour depth of the scour pit around the monopile increases with the increase of flow velocity and decrease of wave height. Under different current-wave conditions, the maximum scour depth of monopile on the side of J-tube cable is more than 10 % of that on the other side. Different protection methods including riprap protection, different bionic grasses protection and combination protections were examined. The dynamic response of J-tube submarine cable was investigated with different protection methods. The results show that the bionic grass can promote sediment deposition in the protection zone, reduce the suspended length of submarine cable. The concrete mattress can significantly reduce the motion amplitude of suspended submarine cable. The combined riprap-bionic grass 3-concrete mattress protection can reduce the local scour by 96.5 % and submarine cable motion amplitude by more than 80 % under current-wave conditions.

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来源期刊

Marine Structures 工程技术-工程：海洋

CiteScore

8.70

自引率

7.70%

发文量

157

审稿时长

6.4 months

期刊介绍： This journal aims to provide a medium for presentation and discussion of the latest developments in research, design, fabrication and in-service experience relating to marine structures, i.e., all structures of steel, concrete, light alloy or composite construction having an interface with the sea, including ships, fixed and mobile offshore platforms, submarine and submersibles, pipelines, subsea systems for shallow and deep ocean operations and coastal structures such as piers.