Land arrangement structure of submarine cable

Abstract

The utility model relates to a land arrangement structure of submarine cables. The device is suitable for the technical field of submarine cable laying equipment. According to the technical scheme, the land arrangement structure of the submarine cables is characterized in that the land arrangement structure of the submarine cables is provided with a cable trench arranged on the land ground, a sludge layer and a backfill soil layer are arranged in the cable trench from bottom to top, the submarine cables are arranged in the sludge layer, and a protective cover plate is arranged between the sludge layer and the backfill soil layer. Thus, the particles of the sludge layer are very small, the submarine cable is wrapped more tightly, a stronger protection effect is achieved, meanwhile, the thermal resistivity of the sludge is lower than that of the backfill, and the transmission efficiency of the submarine cable is better improved; the protective cover plate of the reinforced concrete structure is arranged between the silt layer and the backfill soil layer, so that the protective cover plate can play a supporting role when a heavy object is arranged on the surface of the cable trench, the large-diameter cable in the silt layer is protected, and the arrangement structure is easy and convenient to construct and low in construction cost.

Description

Technical Field

[0001] The utility model relates to a land-laying structure of a submarine cable, which is applicable to the technical field of submarine cable laying equipment. Background Art

[0002] In current offshore wind power projects, conventional 220kV submarine cables need to be connected to an onshore centralized control center after landing. The current method for connecting submarine cables to onshore centralized control centers is to connect the submarine cables to a submarine-to-land cable conversion well, connect the submarine cables to the land cables with a connector, and then connect the submarine cables to the land cables through the land cable channel after converting them to land cables.

[0003] Currently, there are two methods for laying submarine cables on land: 1. Deploy high-voltage towers on the ground and place the submarine cables on them; 2. Set up a cable trench on the ground, install cable racks within the trench, lay the submarine cables on the racks within the trench, and then place cover plates over the trench. However, deploying high-voltage towers or cable trenches is costly and difficult, and requires significant land. This further increases the cost and land required for laying submarine cables. Furthermore, the land where the high-voltage towers and cable trenches are located cannot be used for other purposes. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in order to solve the above technical problem, the present invention provides a land arrangement structure of a submarine cable.

[0005] The technical solution adopted by the utility model is: a land layout structure of a submarine cable, which has a cable trench arranged on the land ground, in which a silt layer and a backfill soil layer are arranged from bottom to top, the submarine cable is arranged in the silt layer, and a protective cover plate is arranged between the silt layer and the backfill soil layer.

[0006] The protective cover plate is a reinforced concrete structure.

[0007] Cover plate support feet are provided on both sides of the protective cover plate, and the cover plate support feet can be anchored into the silt layer.

[0008] The protective cover plate is arranged in a direction parallel to the ground.

[0009] The cross section of the cable trench is trapezoidal, the bottom width of the cable trench is smaller than the top width, and the height of the silt layer is 0.8 to 1 m.

[0010] The protective cover plate is composed of a plurality of cover plate bodies arranged along the length direction of the cable trench.

[0011] The beneficial effects of the present invention are as follows: the present invention forms a cable trench by excavating on the ground where the submarine cable is laid, and fills a silt layer into the cable trench after the submarine cable is laid in the cable trench, so that the silt layer can wrap the cable trench. In this way, because the particles of the silt layer are very small, the submarine cable is wrapped more tightly and has a stronger protective effect, and the wear on the submarine cable is less. At the same time, the thermal resistivity of the silt is lower than that of the backfill soil, which is more conducive to the transmission efficiency of the submarine cable; the present invention fills a backfill soil layer composed of backfill soil on the silt layer in the cable trench, so that the surface of the cable trench is flush with the ground, so that the surface of the cable trench can be used as an ordinary ground; the present invention arranges a protective cover plate of reinforced concrete structure between the silt layer and the backfill soil layer, so that when heavy objects are placed on the surface of the cable trench, the protective cover plate plays a supporting role, thereby protecting large-diameter cables in the silt layer; the present invention arranges cover plate support feet on both sides of the protective cover plate that can be anchored in the silt layer, which can effectively prevent the protective cover plate from slipping between the silt layer and the backfill soil layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : A structural cross-sectional view of the present utility model.

[0013] Figure 2 : A structural diagram of a protective cover plate in the present invention.

[0014] In the figure: 1. Submarine cable; 2. Silt layer; 3. Backfill soil layer; 4. Protective cover plate; 5. Cover plate support legs. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0016] This embodiment is a land-based arrangement structure of a submarine cable 1 .

[0017] In this embodiment, the end of the submarine cable 1 is laid on land and pulled into a submarine-to-land cable conversion shaft to connect the submarine cable 1 with the land cable.

[0018] In this embodiment, a cable trench is excavated on the land at a position corresponding to the layout position of the submarine cable 1 and arranged in the layout direction of the submarine cable 1. When the submarine cable 1 is arranged on the land, the submarine cable 1 is arranged in the cable trench. The cross-section of the cable trench is trapezoidal, and the bottom width of the cable trench is smaller than the top width.

[0019] In this embodiment, a silt layer 2 is arranged in the cable trench. The silt layer has a height of 0.8 to 1 meter. When the submarine cable 1 is laid in the cable trench, the silt layer 2 can wrap around the submarine cable 1. In this way, the silt layer 2 not only provides a soft protection for the submarine cable 1, reducing cable damage caused by ground subsidence or uneven pressure, but also has a lower thermal resistivity than the backfill soil layer 3, helping to maintain stable humidity and temperature in the cable trench, facilitating heat dissipation during operation of the submarine cable 1, and providing a relatively constant environment for the cable.

[0020] In this embodiment, a backfill soil layer 3 is arranged above the silt layer 2 in the cable trench. The backfill soil layer 3 is formed by backfilling the soil from the excavated cable trench. The surface of the backfill soil layer 3 in the cable trench is flush with the ground. In this way, the backfill soil layer 3 can withstand the weight and pressure from above, preventing the pressure from directly acting on the submarine cable 1, and forming a relatively stable environment for the silt layer 2 and submarine cable 1 below, reducing the impact of temperature and humidity changes on the performance of the submarine cable 1. At the same time, the use of original soil backfill will not change the environment surrounding the submarine cable path. After the original soil backfill, the land above the submarine cable 1 path can still be used for its original purpose (for planting, breeding, protecting rare animals, etc.), greatly reducing the difficulty of coordinating land acquisition compensation.

[0021] In this embodiment, a protective cover plate 4 is arranged parallel to the ground between the silt layer 2 and the backfill layer 3 within the cable trench. The protective cover plate 4 is constructed of reinforced concrete. When heavy objects are placed on the ground above the cable trench, the protective cover plate 4 evenly distributes the stress exerted by the heavy objects on the silt layer 2, thus protecting the submarine cable 1 within the trench. The protective cover plate 4 ensures that it can withstand high-intensity loads without slipping or shifting, effectively protecting the underlying submarine cable 1 from being squeezed by the heavy tonnage.

[0022] Furthermore, the protective cover 4 is composed of a plurality of cover bodies arranged along the length direction of the cable trench. In this way, after the silt layer 2 is filled into the cable trench, it is convenient to transport the cover bodies to the corresponding positions and install the cover bodies on the silt layer 2 to form the protective cover 4.

[0023] Furthermore, cover plate support feet 5 are provided on both sides of the protective cover plate 4, and the cover plate support feet 5 can be anchored into the silt layer 2. In this way, when the protective cover plate 4 is arranged on the silt layer 2, the cover plate support feet 5 on both sides of the protective cover plate 4 can be anchored into the silt layer 2, thereby effectively preventing relative slippage between the protective cover plate 4 and the silt layer 2.

[0024] The utility model arranges a submarine cable 1 in a cable trench and then arranges a silt protection cover plate 4 and a backfill soil layer 3 in the cable trench, thereby avoiding the need to install a cable rack in the cable trench, thereby accelerating construction progress and reducing construction costs. Furthermore, by filling the cable trench with a silt layer 2 and a backfill soil layer 3, the submarine cable 1 is protected from exposure to air, thereby reducing the risk of environmental influences and small animals damaging the insulation layer of the submarine cable 1.

[0025] The construction method of this embodiment is:

[0026] Locate and determine the laying route of submarine cable 1, excavate the cable trench for submarine cable 1 on land, and re-measure the laying route coordinates of submarine cable 1 before construction to avoid displacement of submarine cable 1 during installation. The bending radius of the laying route of submarine cable 1 should be controlled to prevent damage to submarine cable 1 during laying;

[0027] The submarine cable 1 is pulled to the corresponding position by floating submarine cable method, and the submarine cable 1 on land is arranged in the cable trench;

[0028] Backfill the silt into the cable trench so that the silt layer 2 composed of silt wraps the submarine cable. The height of the silt layer 2 is 0.8 to 1 m, and the backfill should be dense.

[0029] Arrange a protective cover plate 4 above the silt layer 2, and anchor the cover plate legs 5 on both sides of the protective cover plate 4 into the silt layer 2;

[0030] Backfill the cable trench above the protective cover plate 4 with soil. The soil should be as dense as possible during the backfill process. After the soil is backfilled to the same level as the ground, restore the greening on the surface of the backfill soil layer 5.

[0031] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A land-based structure for a submarine cable, characterized in that: A cable trench is provided on the land surface, wherein a silt layer (2) and a backfill soil layer (3) are provided from bottom to top in the cable trench, a submarine cable (1) is arranged in the silt layer (2), and a protective cover plate (4) is arranged between the silt layer (2) and the backfill soil layer (3).

2. The land-based arrangement structure of a submarine cable according to claim 1, characterized in that: The protective cover plate (4) is a reinforced concrete structure.

3. The land-based arrangement structure of a submarine cable according to claim 1, characterized in that: Cover plate support feet (5) are provided on both sides of the protective cover plate (4), and the cover plate support feet (5) can be anchored into the silt layer (2).

4. The land-based arrangement structure of a submarine cable according to claim 1, characterized in that: The protective cover plate (4) is arranged in a direction parallel to the ground.

5. The land-based arrangement structure of a submarine cable according to claim 1, characterized in that: The cross section of the cable trench is trapezoidal, the bottom width of the cable trench is smaller than the top width, and the height of the silt layer is 0.8 to 1 m.

6. The land-based arrangement structure of a submarine cable according to claim 1, characterized in that: The protective cover plate (4) is composed of a plurality of cover plate bodies arranged along the length direction of the cable trench.

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