Cable river channel laying structure

Abstract

The utility model discloses a cable riverway laying structure which comprises a pipe culvert, a first backfill layer, a cable, a cushion layer, a second backfill layer and a retaining wall, the first backfill layer, the cushion layer and the second backfill layer are sequentially arranged from bottom to top, the pipe culvert is arranged in the first backfill layer, the cable is arranged in the cushion layer, and the retaining wall is arranged on the first backfill layer. Compared with a traditional cable river-crossing scheme, the cable river-crossing channel can be used as a simple and convenient construction channel before the cable is laid, constructors can carry out river-crossing construction through the channel, construction materials can also be transferred, and the material transferring time and the transferring cost are greatly reduced. After the cable is laid, the channel formed by the structure can be used as a maintenance road for maintainers to go in and out, and cable replacement and maintenance are more convenient and faster. The cable is located above the prefabricated pipe culvert, compared with an underwater direct burial and concrete cast-in-place scheme, the scheme isolates the risk that the cable is scoured by river water, and the safety risk coefficient of the cable is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of cable construction technology, and in particular relates to a cable river laying structure. Background Technology

[0002] Traditional methods for crossing rivers using cables include cable trays, underwater direct burial, and cast-in-place concrete. Cable trays require a large amount of material and necessitate support measures for the cable tray sections in the river, resulting in high costs, significant construction difficulty, and a long construction period. Underwater direct burial requires extensive excavation of the riverbed, and the cables, being buried underwater, require high waterproofing performance, further increasing costs and the construction period. Cast-in-place concrete requires extensive riverbed construction, with even higher waterproofing requirements and a longer construction period. In summary, traditional methods for crossing rivers not only involve high personnel investment, long construction periods, and high-quality materials, leading to high overall costs, but also pose significant safety risks to the cables after construction, making subsequent inspection, maintenance, and replacement inconvenient.

[0003] Located in the dry-hot canyon area of ​​Beipanjiang in southern Guizhou, the construction site is characterized by its undulating terrain. Due to the constraints of the terrain, numerous rivers crisscross the construction site, requiring the inverters to cross these rivers within the photovoltaic power plant area. The number of these cables (more than 64, each over 150mm) is also significant. 2 The river has a rapid current, and if construction materials for the photovoltaic plant could be transported across it, the process would be much more convenient and efficient, significantly improving construction efficiency. Traditional cable-crossing methods—such as cable trays, underwater burial, and cast-in-place concrete—are not only time-consuming, costly, and difficult to implement, but also pose significant safety risks to the cables after construction, making subsequent inspection, maintenance, and replacement inconvenient. Furthermore, the difficulties in on-site material transport remain unresolved. Therefore, there is an urgent need to research a fast, safe, reliable, economical cable-crossing solution that also facilitates subsequent inspection, maintenance, and replacement. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a cable riverbed laying structure.

[0005] This utility model is achieved through the following technical solution.

[0006] This utility model provides a cable riverbed laying structure, including a culvert, a first backfill layer, a cable, a bedding layer, a second backfill layer, and a retaining wall. The first backfill layer, the bedding layer, and the second backfill layer are arranged sequentially from bottom to top. The culvert is located in the first backfill layer, the cable is located in the bedding layer, and the retaining wall is set on the first backfill layer. The retaining wall is located on both sides of the bedding layer and the second backfill layer.

[0007] Preferably, the height of the top of the first backfill layer is greater than the height of the river water.

[0008] Preferably, a compacted layer is provided at the bottom of the first backfill layer.

[0009] Preferably, the culvert is arranged parallel to the direction of river flow, and the cable and retaining wall are arranged perpendicular to the direction of river flow.

[0010] Preferably, baffles are provided at both ends of the culvert.

[0011] Preferably, a cable protection plate is provided above the padding layer.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The culvert-plus-direct-buried cable laying method of this utility model, by laying the culvert in the riverbed and placing the cable above the precast culvert, compared with underwater direct burial and concrete casting methods, this method isolates the cable from the risk of being washed by river water, and greatly improves the safety risk factor of the cable.

[0014] 2. The construction process of this utility model is simple and efficient: laying culverts in the river channel → backfilling and building retaining walls above the culverts → direct burial of cables. These three main steps can be completed in seven days. Compared with traditional river crossing methods that often take several weeks and have high costs, this method can reduce time and total cost by more than 40%.

[0015] 3. Compared with traditional cable-crossing river solutions, this utility model first lays prefabricated culverts in the riverbed, then backfills and compacts the soil to form the first backfill layer. Before laying the cable, this serves as a simple construction passage, allowing construction workers to cross the river and transport construction materials, significantly reducing material transport time and costs. After the cable is laid, this passage can serve as a maintenance road for maintenance personnel, making cable replacement and maintenance more convenient and efficient.

[0016] 4. This solution uses simple construction materials, and the procurement of precast culverts is convenient and quick. Other materials can also be sourced locally on the construction site. This solution has a shorter overall construction cycle, wider applicability, and better practicality. Attached Figure Description

[0017] Figure 1 This is a side front view structural schematic diagram of this utility model;

[0018] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 3 This is a top view of the structure of this utility model;

[0020] In the diagram: 1-Culvert, 11-Baffle, 2-First backfill layer, 3-Cable, 31-Cable protection plate, 4-Bedding layer, 5-Second backfill layer, 6-Retaining wall, 7-Compacted layer. Detailed Implementation

[0021] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0022] Example:

[0023] like Figures 1 to 3 As shown, a cable channel laying structure includes a culvert 1, a first backfill layer 2, a cable 3, a cushion layer 4, a second backfill layer 5, and a retaining wall 6. The first backfill layer 2, the cushion layer 4, and the second backfill layer 5 are arranged sequentially from bottom to top. The culvert 1 is located inside the first backfill layer 2, the cable 3 is located inside the cushion layer 4, and the retaining wall 6 is arranged on the first backfill layer 2. The retaining wall 6 is located on both sides of the cushion layer 4 and the second backfill layer 5.

[0024] Both the first backfill layer 2 and the second backfill layer 5 are backfilled with soil. Cable 3 includes power cables and communication optical cables.

[0025] The top height of the first backfill layer 2 is greater than the height of the river water, and the height of the river water does not exceed the top height of the culvert 1, so as to avoid water immersion of the cable 3.

[0026] The bottom of the first backfill layer 2 is set with a compaction layer 7, with a compaction coefficient greater than 0.9, to stabilize the paving structure.

[0027] The culvert 1 is set parallel to the direction of river flow to facilitate the flow of river water, while the cable 3 and retaining wall 6 are set perpendicular to the direction of river flow.

[0028] Baffles 11 are installed at both ends of the culvert 1. The baffles 11 have holes for water flow to prevent weeds, garbage and stones from clogging the culvert 1.

[0029] A cable protection plate 31 is installed above the pad 4, and the pad 4 is made of sand.

[0030] A construction method for a cable channel laying structure includes the following steps:

[0031] S1: The riverbed is compacted to prepare a compacted layer 7. A culvert 1 is laid on the compacted layer 7. The length, number and diameter of the culvert 1 are set according to the actual situation on site. A baffle 11 is set in front of the water inlet of the culvert 1.

[0032] S2: After the culvert 1 is installed, backfill soil is used to backfill and compact the soil to obtain the first backfill layer 2. Retaining walls 6 are built on both sides perpendicular to the water flow direction.

[0033] S3: Sand is laid on top of the first backfill layer 2, and the corresponding number of cables 3 and communication optical cables are laid according to the national standard spacing. Sand is then laid to obtain the cushion layer 4. After covering with cable protection plate 31, backfill soil is used to backfill and compact it to obtain the second backfill layer 5.

Claims

1. A cable river laying structure, characterized by: The utility model relates to a pipeline culvert structure, which comprises a pipeline culvert (1), a first backfill layer (2), a cable (3), a cushion layer (4), a second backfill layer (5) and a retaining wall (6), wherein the first backfill layer (2), the cushion layer (4) and the second backfill layer (5) are sequentially arranged from bottom to top, the pipeline culvert (1) is arranged in the first backfill layer (2), the cable (3) is arranged in the cushion layer (4), the retaining wall (6) is arranged on the first backfill layer (2), and the retaining wall (6) is arranged on both sides of the cushion layer (4) and the second backfill layer (5).

2. A cable raceway structure as defined in claim 1, wherein: The top end of the first backfill layer (2) is higher than the height of river water.

3. A cable raceway structure as defined in claim 1, wherein: A rammed layer (7) is arranged at the bottom of the first backfill layer (2).

4. A cable raceway structure as defined in Claim 1 wherein: The pipeline culvert (1) is arranged in parallel with the flow direction of the river, and the cable (3) and the retaining wall (6) are arranged vertically to the flow direction of the river.

5. A cable raceway structure as defined in claim 1, wherein: Retaining plates (11) are arranged at both ends of the pipeline culvert (1).

6. A cable raceway structure as defined in claim 1, wherein: A cable protection plate (31) is arranged above the cushion layer (4).

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