Submarine cable embedding protecting judging method based on undrained shear strength

A technology for shear strength and submarine cables, which is applied in basic structure tests, basic structure engineering, construction, etc., can solve problems such as the inability to determine the overall project quality of submarine cable burial, and achieve the effect of saving manpower and financial resources

Inactive Publication Date: 2013-09-04
CSG EHV POWER TRANSMISSION
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  • Abstract
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Problems solved by technology

It is also impossible to judge the overall

Method used

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  • Submarine cable embedding protecting judging method based on undrained shear strength
  • Submarine cable embedding protecting judging method based on undrained shear strength
  • Submarine cable embedding protecting judging method based on undrained shear strength

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Embodiment

[0029] Please refer to figure 1 , the judgment method of submarine cable buried protection based on undrained shear strength, including the following steps:

[0030] Step 1. When the embedding machine is in operation, use the working pressure of the high-pressure water pump to act on the embedding arm to spray the seabed, so that the seabed geological soil is cut into grooves, and at the same time, the submarine cable is introduced into the grooves. The embedding machine is automatically propelled on the seabed with hydraulic jet force and thrusters, and the operator controls the lifting and lowering of the embedding arm to complete the operation process.

[0031] Step 2. Detecting the actual buried depth of the submarine cable buried in the seabed geology by means of an acoustic detector.

[0032] Step 3. Obtain the undrained shear strength of the current seabed geological soil according to the working pressure value of the high-pressure water pump and its working time. Its...

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Abstract

The invention discloses a submarine cable embedding protecting judging method based on the undrained shear strength. The method includes the following steps that 1 a submarine cable is led into a seabed cut groove cut by a high-pressure water pump; 2 the actual embedded value of the submarine cable is detected; 3 the current undrained shear strength of the seabed geological soil is obtained; 4 the minimum embedded value corresponding to the current undrained shear strength of the seabed geological soil is calculated; and 5 the minimum embedded value is compared with the actual embedded value, and a submarine cable embedding protecting project is evaluated. During embedding, by comparing the actual embedded value with the minimum embedded value corresponding to the undrained shear strength of the seabed geological soil, whether the embedding protecting project reaches the standard is judged, overall detection of the whole project is not required after construction is finished, and a large quantity of labor and financial resources are saved.

Description

technical field [0001] The invention relates to the buried protection technology of submarine cables, in particular to a method for judging the buried protection of submarine cables based on undrained shear strength. Background technique [0002] 5.7.2 of the "Code for Design of Electric Power Engineering Cables" requires that underwater cables must not be suspended in the water, and the buried depth in shallow water areas should not be less than 0.5m, and the buried depth in deep water channel areas should not be less than 2m. However, none of the design codes addressed the seabed geological conditions. In engineering practice, even if the seabed soft layer is buried deeper than 2m, it still cannot resist the damage of general marine anchors. However, if the hard layer of the seabed reaches the designed buried depth value, the project cost will be greatly increased, and it will be difficult to carry out engineering construction, and it will also make it difficult to repair...

Claims

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Application Information

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IPC IPC(8): E02D33/00
Inventor 王裕霜梅子明李廉益祝夏军陈向东胥兴沛张胜慧王朝硕王祖林
Owner CSG EHV POWER TRANSMISSION
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