Anti-scour structure for capping and protecting end part of submarine cable

Abstract

The utility model provides a submarine cable capping protection end portion anti-scour structure. The submarine cable capping protection end portion anti-scour structure comprises a capping protection layer; the submarine cable is buried in the center of the bottom of the capping protection layer; and the ballast inverted filter pad is laid on the surface of the submarine cable exposed out of the two ends of the capping protection. Due to the fact that the ballast inverted filter pad has the anti-sliding capacity, the anti-scour performance is greatly improved in the mode that the end protection layer presses one side of the ballast inverted filter pad and the periphery of the ballast inverted filter pad presses the balance weight, the phenomenon that a new suspended section is formed at the end after the submarine cable is covered and protected is avoided, and the operation safety of the submarine cable is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of submarine cable laying, in particular to an anti-scouring structure for protecting the end part of a submarine cable with a covering layer. Background Technique

[0002] With the acceleration of the development of marine renewable energy and island economy, submarine cables, as important carriers for transmitting electricity between islands, between islands and the mainland, and between offshore power plants and inland areas, play an increasingly important role, and the safe operation of submarine cables has also become the focus of attention.

[0003] After the submarine cable is laid, due to the long-term action of submarine ocean currents, the overlying soil of the submarine cable will be scoured. In serious cases, a suspended section of the submarine cable will be formed, which poses a threat to the safe operation of the submarine cable. At present, the main methods for preventing submarine cable scouring are scour burying protection, rock throwing protection, concrete interlocking sheet protection, etc.: (1) Scour burying protection: The soil is cut by the water jet of a high-pressure water pump to make the cable sink through the fluidized soil. At the same time, the cable trench is backfilled to bury the submarine cable to a certain depth, which can effectively prevent damage caused by anchoring and fishing, and can reduce the erosion of electrochemistry and organisms on the outer sheath of the cable, and extend the service life of the submarine cable. However, in the section with a hard seabed, it is difficult to meet the design depth requirements, and due to equipment and process limitations, it cannot be applied to the protection of the near-shore section. (2) Rock throwing protection: By piling up rocks, the operating environment of the submarine cable can be effectively improved and stabilized, and the submarine cable can be effectively protected against ocean current scouring, and the suspended section can be protected. However, there will still be ocean current scouring at the covered protection end, and the scouring situation is generally serious, and a suspended section may be formed. (3) Concrete interlocking sheet protection: It relies on the concrete interlocking block flexible sheet for covering, which can also play a role in stabilizing the submarine cable. However, the overall anti-anchoring damage performance of the concrete interlocking block flexible sheet is average, and it is mostly used in the scouring protection of submarine pipelines and cables that already have a certain buried depth in engineering.

[0004] At present, most of the anti-scouring measures for submarine cables adopt rock throwing protection to protect the submarine cable. The rock throwing protection effect is obvious, but there is still the action of ocean current scouring at the covered protection end, and even the ocean current action increases at the covered protection end, and a new suspended section may be generated. Content of the Utility Model

[0005] The purpose of the utility model is to aim at the defects of the prior art and provide an anti-scouring structure for protecting the end part of a submarine cable with a covering layer, which improves the defects of the traditional method of rock throwing protection.

[0006] The utility model provides an anti-scouring structure for protecting the end part of a submarine cable with a covering layer, including: a covering protection layer; a submarine cable buried in the center of the bottom of the covering protection layer; a ballast and filter pad laid on the surface of the submarine cable exposed at both ends of the covering protection.

[0007] Further, it further includes: an end protective layer, and the end protective layer is disposed on the two end surfaces of the covering protective layer along the direction of the submarine cable. Further still, the bottom end of the end protective layer is disposed on the upper surface of one side of the ballast filter mat. Further still, the slope ratio of the end protective layer ≤ 1:5. Further still, the material of the end protective layer is stones or sandbags.

[0008] Further, it further includes: a counterweight, and the counterweight is disposed on the ballast filter mat. Further still, the counterweight is disposed on the side edge of the ballast filter mat.

[0009] Further, the shape of the covering protective layer is a frustum of a pyramid. Further still, the shape of the side end of the covering protective layer is a trapezoid.

[0010] Further, the slope ratio of the end protective layer ≤ 1:5.

[0011] The thickness of the ballast filter mat is 2 - 6 cm.

[0012] Further, the material of the covering protective layer is stones or sandbags.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. Since the ballast filter mat itself has anti-slip ability, by means of pressing one side of the ballast filter mat with the end protective layer and pressing counterweights around the ballast filter mat, the anti-erosion performance is greatly improved, the formation of a new suspended section at the end after covering and protecting the submarine cable is avoided, and the operation safety of the submarine cable is improved.

[0015] 2. Good economic benefits, simple construction process, good durability, and convenient long-term maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0017] Figure 2 is Figure 1 the side view of

[0018] Reference numerals: 1 - covering protective layer; 2 - submarine cable; 3 - ballast filter mat; 4 - end protective layer; 5 - counterweight. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] A kind of anti-erosion structure for protecting the end of a submarine cable by covering it, including: a covering protection layer 1, which is generally composed of stones or sandbags. The shape of the covering protection layer 1 is a frustum of a pyramid, and the shape of the side end of the covering protection layer 1 is a trapezoid, and this shape has relatively high stability. A submarine cable 2, which is buried in the center of the bottom of the covering protection layer 1, effectively improving and stabilizing the operating environment of the submarine cable and effectively resisting the erosion of ocean currents. A ballast filter pad 3, which is laid on the surface of the submarine cable 2 exposed at both ends of the covering protection 1. Since there will still be ocean current erosion at the end of the covering protection, the erosion situation is generally more serious and may form a suspended section. The ballast filter pad 3 is used to prevent the submarine soil from being carried away by ocean currents. The thickness of the ballast filter pad 3 is 2-6 cm, preferably 4 cm. The shape of the ballast filter pad 3 is set according to the terrain. The ballast filter pad 3 is composed of geotextile, Mac mat, and double-twisted hexagonal mesh. An end protection layer 4, which is arranged on the surfaces of both ends of the covering protection layer 1 along the direction of the submarine cable 1. The bottom end of the end protection layer 4 is arranged on the upper surface of one side of the ballast filter pad 3, pressing one side of the ballast filter pad 3. The slope ratio of the end protection layer 4 ≤ 1:5 to prevent gravel from slipping. The function of the end protection layer 4 is to reinforce the ends of the covering protection layer 1. The end protection layer 4 is generally composed of stones or sandbags. A counterweight 5, which is arranged on the ballast filter pad 3, preferably arranged on the side edge of the ballast filter pad 3, to prevent the ballast filter pad 3 from being washed away by ocean currents. The counterweight 5 is generally a sandbag or a flexible stone cage cover plate, etc., mainly used to fix the ballast filter pad. The ballast filter pad 3 itself has self-weight stability and can be fixed at the end of the covering protection by its own gravity.

[0021] During laying, it includes the following steps: (1) Construct a covering protection layer 1 on the surface of the submarine cable 2; (2) Lay a ballast filter pad 3 on the surface of the submarine cable 2 exposed at the end of the covering protection layer 1; (3) Lay an end protection layer 4 on the trapezoidal cross-section of both ends of the covering protection layer 1, pressing one side of the ballast filter pad 3; (4) Press a counterweight 5 along the periphery of the ballast filter pad 3.

[0022] Since the ballast filter pad 3 itself has anti-slip ability, by the way of pressing one side of the ballast filter pad by the end protection layer 4 and pressing a counterweight 5 around the ballast filter pad 3, the anti-erosion performance is greatly improved, avoiding the formation of a new suspended section at the end after covering and protecting the submarine cable 2, and improving the safety of the submarine cable operation.

[0023] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included within the protection scope of the present application.

Claims

1. A submarine cable capping protection end anti-erosion structure, characterized in that Comprising: Covering protection layer (1); Submarine cable (2), the submarine cable (2) being buried at the center of the bottom of the covering protection layer (1); Ballast filter pad (3), the ballast filter pad (3) being laid on the surface of the submarine cable (2) exposed at both ends of the covering protection layer (1).

2. The anti-erosion structure for protecting the end part of a submarine cable with a cover according to claim 1, wherein Further comprising: End protection layer (4), the end protection layer (4) being arranged on the surfaces at both ends of the covering protection layer (1) along the direction of the submarine cable (2).

3. The anti-scouring structure for the end of the submarine cable with covering protection according to claim 2, characterized in that: The bottom end of the end protection layer (4) is arranged on the upper surface of one side of the ballast filter pad (3).

4. The anti-erosion structure for protecting the end part of a submarine cable with a cover according to claim 1, characterized in that, Further comprising: Counterweight (5), the counterweight (5) being arranged on the ballast filter pad (3).

5. The anti-scouring structure for the end of the submarine cable with covering protection according to claim 4, characterized in that: The counterweight (5) is arranged on the side edge of the ballast filter pad (3).

6. The anti-scouring structure for the end of the submarine cable with covering protection according to claim 1, characterized in that: The shape of the covering protection layer (1) is a frustum of a pyramid.

7. The anti-scouring structure for the end of the submarine cable with covering protection according to claim 2, characterized in that: The material of the end protection layer (4) is stones or sandbags.

8. The anti-scouring structure for the end of the submarine cable with covering protection according to claim 2, characterized in that: The slope ratio of the end protection layer (4) is ≤1:

5.

9. The anti-scouring structure for the end of the submarine cable with covering protection according to claim 1, characterized in that: The thickness of the ballast filter pad (3) is 2 - 6 cm.

10. The anti-scouring structure for the end of the submarine cable with covering protection according to claim 1, characterized in that: The material of the covering protection layer (1) is stones or sandbags.

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