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Design method for submarine cable burial depth requirement answering anchor damage

A technology of submarine cables and design methods, applied in the directions of computer-aided design, design optimization/simulation, calculation, etc., can solve problems such as damage to submarine cables, and achieve the effect of eliminating hazards

Active Publication Date: 2017-09-15
SHANGHAI ELECTRIC POWER DESIGN INST
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Problems solved by technology

[0003] However, there are also hidden dangers in this existing method. Since the submarine cable is laid below the sea channel, if the ship sailing on the sea is anchored and anchored, the anchor will be damaged in the process of inserting the seabed mud layer.

Method used

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  • Design method for submarine cable burial depth requirement answering anchor damage
  • Design method for submarine cable burial depth requirement answering anchor damage
  • Design method for submarine cable burial depth requirement answering anchor damage

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Embodiment

[0057] Take the Zhongtian-Meizhou 110kV line project of the State Grid Power Transmission and Transformation Design Competition as an example. The average water temperature is 20°C. According to the survey, the maximum water depth in the sea area is 14.7m. The strata in this section are mainly Holocene marine deposits and flood Accumulative sedimentary layer, residual layer and fully weathered granite layer.

[0058] Calculate and analyze according to the geology of the seabed section map obtained from exploration. The submarine cable routing area passes through the Wenjia branch channel. After consultation with the channel manager (Fujian Province Meizhou Bay Port Administration), it is recommended to lay submarine cables at least in accordance with the water depth requirements of 3000-ton ships. According to research and relevant statistical data, 3000 Tonnage ships use Hall anchors, and the anchor weight is about 2.5t.

[0059] use as figure 1 As shown, the design method ...

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Abstract

The invention discloses a design method for submarine cable burial depth requirement answering anchor damage. The method comprises the following steps: a, according to conditions of a submarine cable burial sea area and anchor tonnage, determining an anchor type and parameters of a boat anchor; b, according to the conditions of a submarine cable burial sea area, and the anchor type and parameters of the boat anchor, calculating speed of the boat anchor when contacting a water surface; c, calculating speed of the boat anchor when contacting a seabed surface layer; d, calculating in-soil depth of the anchor when the anchor passes through the seabed surface layer until the anchor stands still; e, according to seabed soil survey, determining whether an anchor dropping soil layer is a hard soil layer, if not, directly executing the next step, if yes, based on the in-soil depth of the anchor, increasing fluke downward holding length; f, calculating deep burying margin increased by sluicing influence; g, obtaining a design value of submarine cable deep burying. After the design method designs laying of a submarine cable, defects in the prior art can be effectively overcome, to eliminate damages which may cause to the submarine cable by anchoring of ships.

Description

technical field [0001] The invention relates to the technical field of submarine cable laying, in particular to a design method for addressing the buried depth requirements of submarine cables for anchor damage. Background technique [0002] The laying of submarine cables is a commonly used form of cable laying. In the existing submarine cable laying operations, submarine cables are laid along sea lanes. Using this method of laying on the existing sea channel can greatly reduce the cost of seabed survey in the early stage, and can use the channel for material transportation during the laying operation, which is conducive to speeding up the construction speed. [0003] However, there are also hidden dangers in this existing method. Since the submarine cable is laid below the sea channel, if the ship sailing on the sea is anchored and anchored, the anchor will be damaged in the process of inserting the seabed mud layer. . [0004] Therefore, there is an urgent need for a spe...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2113/16
Inventor 李帅波王婧倩韩春龙
Owner SHANGHAI ELECTRIC POWER DESIGN INST
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