Innovative floating support technologies for submarine cable landing

Zhang, Zhigang; Dong, Yijun; Yuan, Zhoulong; Liu, Zhen

doi:10.1201/9780429295300-10

Cited by 2 publications

(2 citation statements)

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“…According to existing technical solutions, submarine cables often use slotting and burying, stacking bridges, and channels to build channels on the land surface before landing [3][4]. However, when encountering steep rock formations, the above methods will lead to difficulty slotting rocks, vertical slope landing and burying, and erosion prevention [5][6].…”

Section: Introdauctionmentioning

confidence: 99%

Research on Horizontal Directional Drilling Scheme for Large Cross Section Submarine Cable Crossing Hard Rock

Wu,

Huang,

Qiu

et al. 2024

E3S Web Conf.

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With the increasing number of submarine cable projects, the terrain and geological conditions of the landing section are becoming increasingly complex, and the traditional implementation of trench burial is becoming increasingly difficult. A landing construction plan for large-section power cables suitable for steep terrain and rugged rock formations is studied and proposed based on sorting out existing submarine cable landing plans. Using directional drilling construction machinery ideal for rock formations, natural cable protection pipes are formed in rock formations after dragging and expanding the holes, meeting submarine cable protection’s safety and economic requirements. In the climbing section of the submarine cable from the seabed to the rock hole, measures such as bottom sandbag raising and top rock throwing security are adopted to avoid vortex-induced vibration and erosion caused by the cable hanging in the climbing section. The construction plan of the directional drilling passage through hard rock and the construction and protection plan of the submarine cable do not affect the current situation of the existing coastal reefs and can effectively protect the submarine cable from external damage, achieving green and environmentally friendly construction.

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Section: Introdauctionmentioning

confidence: 99%

Research on Horizontal Directional Drilling Scheme for Large Cross Section Submarine Cable Crossing Hard Rock

Wu,

Huang,

Qiu

et al. 2024

E3S Web Conf.

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“…In addition, a critical issue to prevent cable damage is to control the tension in the cable during laying [3,4]. Compared to the traditional landing methodology, floaters could be employed to provide additional buoyancy to the floating cable and prevent possible overloaded friction and bending stress concentration [5]. On the other hand, a reasonable design and deployment of the mooring lines could enhance the stability of a cable-laying vessel in complicated sea states and reduce the tension in the cable from the vessel motion.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Interactions of a Cable-Laying Vessel with a Submarine Cable during Its Landing Process

Kuang¹,

Chen²,

Yuan³

et al. 2022

JMSE

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The rapid development of offshore electricity grid construction has led to a great demand for submarine cable deployment. In this study, a numerical model is established based on the commercial software ANSYS-AQWA to investigate the dynamic interactions between a cable-laying vessel and a submarine cable during its landing process, which has not yet been reported and is critical to the safety of the cable. The numerical model was validated by an experimental test on the mooring stability of a vessel conducted in a wave tank. The effects of the cable length, the current velocity, the incident wave, and the wind direction on vessel stability and the tensions in the mooring lines and cable were investigated. When the cable length is short, the submarine cable acts as a mooring cable that can stabilize the hull, but it is not safe to apply force to the submarine cable. At the same time, an increase in the current speed also increases the tensile force of the submarine cable. The influence of different incident wave directions and wind directions on the stability and tension of ships in mooring lines and cables was studied, and the most unfavorable environmental conditions for submarine cable laying were determined under different environmental conditions.

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Innovative floating support technologies for submarine cable landing

Cited by 2 publications

References 0 publications

Research on Horizontal Directional Drilling Scheme for Large Cross Section Submarine Cable Crossing Hard Rock

Research on Horizontal Directional Drilling Scheme for Large Cross Section Submarine Cable Crossing Hard Rock

Dynamic Interactions of a Cable-Laying Vessel with a Submarine Cable during Its Landing Process

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