Cable trench device and arrangement method thereof

Abstract

The invention discloses a cable trench device and an arrangement method thereof, the cable trench device comprises a cable trench main body, a drainage device, a support rod and a cable laying rack, and the side wall of the cable trench main body is provided with a first drainage channel; the drainage device is arranged on the top surface of the cable trench main body, the drainage device sequentially comprises an anti-seepage porous plate, a granular aggregate layer and a reinforced bearing layer from top to bottom, and the drainage device is provided with first drainage holes; the supporting rod is arranged in the cable trench body, and the two ends of the supporting rod are fixedly connected to the two opposite inner side walls of the cable trench body respectively. The cable laying frame is arranged in the cable trench body, and the top end of the cable laying frame is in spherical hinge connection with the middle of the supporting rod. According to the device, the possibility that accumulated water covering soft soil permeates into the cable trench is reduced, the vibration reduction and load resistance effects can be achieved, the cable laying frame can be kept vertical all the time by means of the gravity of the cable laying frame so that it can be guaranteed that the cable is in a horizontal placement state all the time, and the possibility that the cable overturns is eradicated.

Description

Technical Field

[0001] The invention relates to the technical field of cable trenches, and in particular to a cable trench device and an arrangement method thereof. Background Art

[0002] The construction of urban power grids has shifted from overhead lines to laying cables using underground transmission structures such as cable trenches. Since the geological conditions in the deep soft soil areas of the southeast coast usually present the characteristics of "high groundwater level, high soil moisture content, high compressibility, low strength, high sensitivity, and low permeability", the existing shallow buried cable trenches crossing the main roads of the city and even the internal cables are very easy to be damaged under the instantaneous action of urban traffic loads, especially large transport vehicles, cement mixers and other extreme traffic loads. The main reasons are as follows: 1. Since the soft soil overlying the cable trench has a high moisture content, water seepage is likely to occur inside the cable trench and water will accumulate in the trench. Long-term immersion of the cable in water can easily cause cable insulation failure, leading to power grid accidents and seriously affecting the safe operation of the power grid; 2. Under the instantaneous action of extreme traffic loads, the existing cable trench has weak vibration reduction capacity and is prone to brittle fracture, thus affecting the overall structure of the cable trench; 3. Under the long-term cyclic action of extreme traffic loads, the excess pore water pressure in the soil around the underground recycled concrete transmission structure increases, the effective stress decreases, the modulus softens, and residual strain is generated, resulting in a large additional settlement of the soil around the structure, which in turn causes uneven settlement of the cable trench, especially lateral overturning. This process may not damage the overall structure of the cable trench, but because traditional cable laying racks are fixed to the side walls of the cable trench, the overturning of the cable trench will cause the overturning of the cable laying rack, resulting in the overturning and dislocation of the internal cables, and even causing a large number of cable damage; 4. The deformation modulus of soft soil is low and the deformation time is long. On the one hand, in the process of bearing the overlying load, the surrounding soft soil will squeeze the side wall of the cable trench; on the other hand, the traditional cable laying frame is fixed to the side wall of the cable trench, which will affect the integrity of the side wall of the cable trench. In addition, the deadweight of the cable laying frame and the cable further increases the burden of the side wall of the cable trench to resist the lateral load. Therefore, the side wall of the cable trench in the soft soil area is greatly deformed and easily damaged.

[0003] In summary, there is an urgent need for a cable trench device that is highly waterproof, has anti-overturning capabilities, and can withstand extreme traffic loads. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a cable trench device with anti-overturning capability and capable of withstanding extreme traffic loads in view of the above-mentioned prior art.

[0005] The second technical problem to be solved by the present invention is to provide a method for arranging the above-mentioned cable trench device.

[0006] The technical solution adopted by the present invention to solve the first technical problem is: a cable trench device, characterized in that it includes: A cable trench body, wherein a first drainage channel is provided on a side wall of the cable trench body; A drainage device is arranged on the top surface of the cable trench body, and the drainage device includes an anti-seepage porous plate, a granular aggregate layer and a reinforced bearing layer from top to bottom. The drainage device is provided with a first drainage hole, and the first drainage hole is connected to the first drainage channel; A support rod is arranged inside the cable trench body, and two ends of the support rod are respectively fixed to two opposite inner side walls of the cable trench body; The cable laying frame is arranged inside the main body of the cable trench. The top of the cable laying frame is connected to the middle part of the support rod by a ball joint. The cable laying frame is used to carry the cables.

[0007] As an improvement, in the cable trench device, the drainage device further comprises a flexible filter layer, and the flexible filter layer is arranged inside the anti-seepage porous plate.

[0008] As a further improvement, in the cable trench device, the granular aggregate layer includes granular matter, and the particle size of the granular matter is larger than the hole size of the first drainage hole.

[0009] As an improvement, in the cable trench device, a second drainage hole is provided at the bottom of the cable trench body, and the second drainage hole is used for allowing the accumulated water inside the cable trench body to flow out.

[0010] Further improvement, in the cable trench device, the support rod includes two support parts, the two support parts are arranged opposite to each other, one end of one of the support parts is arranged obliquely on the side wall of the cable trench body, and one end of the other support part is arranged obliquely on the side wall of the cable trench body, and the connection between the two support parts is connected to the cable laying frame ball joint.

[0011] As a further improvement, in the cable trench device, the supporting portion includes a middle portion and a connecting portion, an end of the connecting portion away from the middle portion is connected to the side wall of the cable trench body, and the cross-sectional area of ​​the connecting portion gradually increases from the end connected to the middle portion to the end away from the middle portion.

[0012] Improved, in the cable trench device, the cable laying frame includes a vertical pole and a horizontal pole, the top end of the vertical pole is ball-jointed to the support pole, the vertical pole is vertically arranged, and the horizontal pole is perpendicular to the vertical pole.

[0013] Optionally, in the cable trench device, there are multiple cross bars, and the multiple cross bars are arranged at intervals along the length direction of the vertical poles.

[0014] Further improvement, in the cable trench device, the cable trench main body includes a top part and a bottom part, the top part is located above the bottom part, the drainage device is arranged on the top surface of the top part, and the cross-sectional area of ​​the bottom part gradually increases from an end connected to the top part to an end away from the top part.

[0015] The technical solution adopted by the present invention to solve the second technical problem is: a method for arranging a cable trench device, comprising any one of the cable trench devices described above, characterized in that the method for arranging the cable trench device comprises the following steps: Step 1: During the construction process, a trench is excavated, a drainage channel with a certain slope is assembled at the bottom of the trench, and the cable trench body is installed on the upper part of the drainage channel; wherein the cable laying frame has been installed inside the cable trench body; Step 2, laying cables on the cable laying frame and covering the drainage device; Step 3, laying a gravel layer or a granular layer on the upper part of the drainage device; Step 4: backfill the soft soil layer and the construction is completed.

[0016] Compared with the prior art, the advantages of the present invention are: Firstly, the cable trench device in the present invention is provided with a drainage device on the top surface of the cable trench body, and the drainage device comprises an impermeable porous plate, a granular aggregate layer and a reinforced bearing layer from top to bottom. The impermeable porous plate can reduce the infiltration of the accumulated water of the overlying soft soil into the interior of the cable trench body, and the structural design of the porous plate can effectively block the penetration of water while ensuring the discharge of the accumulated water. The granular aggregate layer has good water permeability and can guide the accumulated water to flow into the first drainage hole. The reinforced bearing layer effectively increases the strength of the top surface of the cable trench body, can disperse the pressure from the overlying soft soil, and reduce the direct impact of the external load on the cable trench body under the action of extreme traffic loads. At the same time, the granular aggregate layer can provide a certain buffer for the reinforced bearing layer and reduce the direct pressure of the external load on the cable trench body. Therefore, the cable trench device of the present invention can enable a large amount of accumulated water generated by the compression deformation of the overlying soft soil to be directly discharged along the first drainage hole and the first drainage channel through the hierarchical structure of the anti-seepage porous plate and the granular aggregate layer, which fundamentally reduces the possibility of the accumulated water in the overlying soft soil infiltrating into the cable trench. The anti-seepage porous plate and the granular aggregate layer also have vibration reduction capabilities, which can prevent the main body of the cable trench from being cracked and damaged due to instantaneous extreme loads, and the reinforced bearing layer can also effectively resist external loads, thereby achieving the effect of vibration reduction and load resistance.

[0017] Secondly, the cable trench device of the invention is also provided with a support rod that is fixedly connected to the inner wall of the cable trench body at an angle, and the cable laying frame is connected to the middle ball joint of the support rod, so that the deadweight of the support rod, the cable laying frame and the cable is converted into pressure applied to the side wall of the cable trench body, and the side wall of the cable trench body resists the lateral load of the external soil together with the side wall of the cable trench body, and the cross-sectional area of ​​the connection part gradually increases from the end close to the middle part to the end away from the middle part, so that the pressure applied to the inner wall of the cable trench body is more uniform, and the integrity of the entire lateral load bearing system is improved. The top of the cable laying frame is connected to the support rod ball joint, and the cable laying frame can always remain vertical by its own weight, thereby ensuring that the cable is always in a horizontal position, thereby eliminating the possibility of the cable overturning. Even if the cable trench body overturns, the stable arrangement of the cable can still be guaranteed, and the cable can be stably protected, which can prevent the internal cables of the cable trench body from overturning or even being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a cable trench device in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a drainage device in an embodiment of the present invention; Figure 3 It is a schematic diagram of the structure of the cable laying frame in an embodiment of the present invention.

[0020] 1. Cable trench body; 11. First drainage channel; 12. Second drainage hole; 13. Top part; 14. Bottom part; 2. Drainage device; 21. Anti-seepage porous plate; 22. Granular aggregate layer; 23. Reinforced bearing layer; 24. First drainage hole; 25. Flexible filter layer; 3. Cable laying frame; 31. Vertical pole; 32. Cross pole; 4. Support pole; 41. Support part; 42. Middle part; 43. Connecting part.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "and / or" in the full text includes three solutions. Taking A and / or B as an example, it includes technical solution A, technical solution B, and technical solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] refer to Figure 1 and Figure 2 This embodiment provides a cable trench device, which includes a cable trench main body 1, a drainage device 2 and a cable laying frame 3. The side wall of the cable trench main body 1 is provided with a first drainage channel 11; the drainage device 2 is covered on the top surface of the cable trench main body 1, and the drainage device 2 includes an anti-seepage porous plate 21, a granular aggregate layer 22 and a reinforced bearing layer 23 from top to bottom. The bottom of the granular aggregate layer 22 is provided with a first drainage hole 24, and the first drainage hole 24 is connected to the first drainage channel 11; the cable trench main body 1 is an internal hollow structure, and the cable laying frame 3 is arranged inside the cable trench main body 1, and the cable laying frame 3 is used to carry cables.

[0026] The cable trench device provided in the present embodiment is provided with a drainage device 2 on the top surface of the cable trench body 1. The drainage device 2 includes an impermeable porous plate 21, a granular aggregate layer 22 and a reinforced bearing layer 23 from top to bottom. The impermeable porous plate 21 can reduce the infiltration of accumulated water from the overlying soft soil into the interior of the cable trench body 1. The structural design of the porous plate can effectively block the penetration of water while ensuring the discharge of accumulated water. The granular aggregate layer 22 has good water permeability and can guide the accumulated water to flow into the first drainage hole 24. The reinforced bearing layer 23 effectively increases the strength of the top surface of the cable trench body 1, can disperse the pressure from the overlying soft soil, and reduce the direct impact of external loads on the cable trench body 1 under extreme traffic loads. At the same time, the granular aggregate layer 22 can provide a certain buffer for the reinforced bearing layer 23 and reduce the direct pressure of external loads on the cable trench body 1. Therefore, the cable trench device of this embodiment, by providing a layered structure with an impermeable porous plate 21 and a granular aggregate layer 22, can enable a large amount of accumulated water generated by the compression deformation of the overlying soft soil to be directly discharged along the first drainage hole 24 and the first drainage channel 11, fundamentally reducing the possibility of accumulated water in the overlying soft soil infiltrating into the cable trench; the impermeable porous plate 21 and the granular aggregate layer 22 also have vibration reduction capabilities, which can prevent the cable trench body 1 from cracking and damage due to instantaneous extreme loads, and the reinforced bearing layer 23 can also effectively resist external loads, achieving the effect of vibration reduction and load resistance.

[0027] In this embodiment, first drainage holes 24 are provided at the bottoms of two opposite side walls of the granular aggregate layer 22 , and first drainage channels 11 are provided at two opposite side walls of the cable trench body 1 .

[0028] Specifically, the anti-seepage porous plate 21 is made of high ductility material, which can not only filter water but also reduce vibration. The anti-seepage porous plate 21 is specifically a flexible concrete porous plate or a rubber mesh material.

[0029] Specifically, the cross-sectional dimensions of the anti-seepage porous plate 21, the granular aggregate layer 22 and the reinforced bearing layer 23 are the same, and the cross-sectional dimension of the reinforced bearing layer 23 is larger than the dimension of the top opening of the cable trench body 1, so that the reinforced bearing layer 23 can completely cover the top opening of the cable trench body 1.

[0030] Specifically, the reinforced bearing layer 23 is a reinforced concrete layer, which can effectively resist the overlying load.

[0031] Specifically, the cable trench body 1 is a prefabricated component, and the cable trench body 1 can be prefabricated into different lengths in the factory. Each section of the cable trench body 1 can have a variety of connection methods, such as snap-in block connection, cast-in-place cement connection, connection iron sheet welding, etc.

[0032] refer to Figure 2The drainage device 2 further includes a flexible filter layer 25 , which is horizontally arranged inside the anti-seepage porous plate 21 .

[0033] Specifically, the flexible filter layer 25 is made of a polymer material, specifically high-density polyethylene, polyvinyl chloride, etc. The flexible filter layer 25 has good water permeability and can effectively prevent soil particles from penetrating, thereby preventing soil particles from clogging the anti-seepage porous plate 21 and the granular aggregate layer 22 .

[0034] Furthermore, the cross-sectional dimension of the flexible filter layer 25 is the same as that of the impermeable porous plate 21 , so that the flexible filter layer 25 can cover the entire cross-sectional dimension of the impermeable porous plate 21 , thereby reducing the risk of the impermeable porous plate 21 being blocked.

[0035] refer to Figure 2 The granular aggregate layer 22 includes granular materials, and the particle size of the granular materials is larger than the hole size of the first drainage hole 24 .

[0036] Specifically, the granular aggregate layer 22 includes a combination of granules of various particle sizes, and the minimum particle size of the granules is larger than the aperture of the first drainage hole 24 , thereby preventing the granules from being impacted by water and flowing into the first drainage hole 24 , thereby blocking the first drainage hole 24 .

[0037] Specifically, the granular material is gravel or artificial granular material, etc. Artificial granular material, such as unfired expanded clay, etc., can not only achieve the effect of efficient vibration reduction, but also effectively resist the external load on the upper part.

[0038] Since the granular aggregate layer 22 is in an unsaturated state for a long time, the matrix suction mainly based on the capillary water force can further improve the bearing capacity of the granular aggregate layer 22 .

[0039] refer to Figure 1 A second drainage hole 12 is provided at the bottom of the cable trench body 1 , and the second drainage hole 12 is used for allowing the accumulated water inside the cable trench body 1 to flow out.

[0040] Specifically, a second drainage channel is opened at the bottom of the cable trench body 1, and the second drainage channel is connected to the second drainage hole 12. Once water seepage occurs inside the cable trench body 1, the accumulated water that has seeped into the cable trench can be quickly discharged to the outside of the cable trench body 1, thereby keeping the inside of the cable trench body 1 dry.

[0041] Specifically, a drainage channel is provided below the bottom of the cable trench body 1 . The drainage channel is provided at a certain inclination, so that water flowing out of the second drainage hole 12 and the first drainage channel 11 at the bottom of the cable trench body 1 can be quickly discharged to avoid accumulation at the bottom of the cable trench body 1 .

[0042] Furthermore, the drainage channel can have various shapes and can be installed by either cast-in-place or prefabricated method.

[0043] Correspondingly, the bottom end of the first drainage channel 11 is inclined toward the direction close to the second drainage hole 12, so that the water output from the first drainage channel 11 and the second drainage hole 12 can converge and flow into the drainage channel.

[0044] refer to Figure 1 The device of the present application further comprises a support rod 4, which is arranged inside the cable trench body 1, and the two ends of the support rod 4 are respectively fixed to the two opposite inner side walls of the cable trench body 1, and the top of the cable laying frame 3 is connected to the middle of the support rod 4 by a ball joint. Specifically, the cable laying frame 3 of the present application is a suspended cable laying frame.

[0045] The support rod 4 includes two support parts 41, and the two support parts 41 are arranged opposite to each other, one end of one support part 41 is arranged obliquely on the side wall of the cable trench body 1, and one end of the other support part 41 is arranged obliquely on the side wall of the cable trench body 1, and the connection of the two support parts 41 is connected to the cable laying frame 3 by a ball joint. The support part 41 is arranged obliquely relative to the side wall of the cable trench body 1, and the oblique setting can better adapt to the lateral pressure change of the soil by decomposing the supporting force into vertical and horizontal forces, thereby avoiding local excessive force and reducing the lateral displacement or settlement of the soil.

[0046] Specifically, the support rod 4 is integrally provided, and the two support parts 41 are symmetrically provided. By fixing the two support parts 41 to the two opposite inner side walls of the cable trench body 1, the top of the cable laying frame 3 is connected to the connection between the two support parts 41 by a ball joint, so that the weight of the cable laying frame 3 can be transferred to the inner side wall of the cable trench body 1 and converted into pressure applied outward to resist the lateral pressure of the soil on the outer side wall of the cable trench body 1.

[0047] refer to Figure 1 The supporting portion 41 includes a middle portion 42 and a connecting portion 43. The end of the connecting portion 43 away from the middle portion 42 is connected to the side wall of the cable trench body 1. The cross-sectional area of ​​the connecting portion 43 gradually increases from the end connected to the middle portion 42 to the end away from the middle portion 42. The middle portion 42 of one supporting portion 41 is connected to the middle portion 42 of another supporting portion 41.

[0048] The connecting portion 43 will be subjected to greater lateral pressure or external load at the end close to the cable trench body 1. By designing the cross-sectional area of ​​the connecting portion 43 to gradually increase from the end connected to the middle portion 42 to the end away from the middle portion 42, the increased cross-sectional area can effectively increase the strength of the portion of the connecting portion 43 close to the cable trench body 1, thereby helping the support rod 4 to withstand greater external forces and avoid local damage or instability.

[0049] In this embodiment, the middle portion 42 is cylindrical, and the connecting portion 43 is truncated cone-shaped.

[0050] refer to Figure 3 The cable laying frame 3 includes a vertical rod 31 and a horizontal rod 32. The top of the vertical rod 31 is connected to the support rod 4 by a ball joint. The vertical rod 31 is vertically arranged, and the horizontal rod 32 is perpendicular to the vertical rod 31. The cable is horizontally placed on the horizontal rod 32. There are multiple horizontal rods 32, and the multiple horizontal rods 32 are arranged at intervals along the length direction of the vertical rod 31.

[0051] Specifically, the vertical rod 31 is located in the middle of the horizontal rod 32, which can improve stability and evenly distribute the load.

[0052] refer to Figure 1 The cable trench body 1 includes a top portion 13 and a bottom portion 14, the top portion 13 is located above the bottom portion 14, the drainage device 2 is arranged on the top surface of the top portion 13, and the cross-sectional area of ​​the bottom portion 14 gradually increases from one end connected to the top portion 13 to one end away from the top portion 13. Such an arrangement can significantly improve the lateral anti-overturning capability of the cable trench body 1.

[0053] Specifically, the cross section of the top portion 13 is rectangular, the cross section of the bottom portion 14 is trapezoidal, and the top portion 13 and the bottom portion 14 are integrally provided.

[0054] Specifically, the drainage device 2, the cable laying frame 3 and the support rod 4 are all assembled components, the product quality is controllable and the installation is convenient and quick. All components of the device can be mass-produced, and the assembled cable trench can significantly improve the construction efficiency.

[0055] The present application designs a support rod 4 that is fixedly connected to the inner wall of the cable trench body 1 obliquely, and the cable laying frame 3 is connected to the middle part of the support rod 4 by a ball joint, so that the dead weight of the support rod 4, the cable laying frame 3 and the cable is converted into pressure applied to the side wall of the cable trench body 1, and the side wall of the cable trench body 1 resists the lateral load of the external soil together with the side wall of the cable trench body 1, and the cross-sectional area of ​​the connecting portion 43 gradually increases from the end close to the middle part 42 to the end away from the middle part 42, so that the pressure applied to the inner wall of the cable trench body 1 is more uniform, and the integrity of the entire lateral load bearing system is improved. The top of the cable laying frame 3 is connected to the support rod 4 by a ball joint, and the cable laying frame 3 can always remain vertical by its own weight to ensure that the cable is always in a horizontal position, thereby eliminating the possibility of the cable overturning. Even if the cable trench body 1 overturns, the stable arrangement of the cable can still be guaranteed, and the cable can be stably protected, which can prevent the internal cable of the cable trench body 1 from overturning or even being damaged.

[0056] The present application also provides a method for arranging a cable trench device, comprising the following steps: During the construction process, a trench is excavated, a drainage channel with a certain inclination is assembled at the bottom of the trench, and a cable trench body 1 is installed on the upper part of the drainage channel. Among them, the cable laying frame 3 has been set up inside the cable trench body 1, and each section of the cable trench body 1 is 1.0 meters long and connected by a clamping block. After the assembly is completed, a waterproof strip is laid at each connection between the cable trench body 1 and the cable trench body 1. After all are completed, the cable is laid on the cable laying frame 3, the drainage device 2 is covered, and a sealing strip is set at the connection. Then, a 0.3-meter gravel (or coarse particles such as unburned ceramsite) layer is laid on the upper part of the drainage device 2, and finally the soft soil layer is backfilled to complete the construction.

[0057] After the cable trench device is installed, a layer of gravel (or coarse particles such as unburned expanded clay) is laid on the upper part of the drainage device 2 to form a drainage layer to avoid long-term water accumulation on the upper part of the cable trench device. At the same time, it can also provide a certain buffer for the cable trench device and reduce the pressure of external loads on the cable trench device.

[0058] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A cable trench device, characterized in that: include: A cable trench body, wherein a first drainage channel is provided on a side wall of the cable trench body; A drainage device is arranged on the top surface of the cable trench body, and the drainage device includes an anti-seepage porous plate, a granular aggregate layer and a reinforced bearing layer from top to bottom. The drainage device is provided with a first drainage hole, and the first drainage hole is connected to the first drainage channel; A support rod is arranged inside the cable trench body, and two ends of the support rod are respectively fixed to two opposite inner side walls of the cable trench body; The cable laying frame is arranged inside the main body of the cable trench. The top of the cable laying frame is connected to the middle part of the support rod by a ball joint. The cable laying frame is used to carry the cables.

2. The cable trench device according to claim 1, characterized in that: The drainage device also includes a flexible filter layer, which is arranged inside the anti-seepage porous plate.

3. The cable trench device according to claim 1, characterized in that: The granular aggregate layer includes granular matter, and the particle size of the granular matter is larger than the hole size of the first drainage hole.

4. The cable trench device according to claim 1, characterized in that: A second drainage hole is provided at the bottom of the cable trench body, and the second drainage hole is used for allowing the accumulated water inside the cable trench body to flow out.

5. The cable trench device according to claim 1, characterized in that: The support rod includes two support parts, which are arranged opposite to each other; one end of one of the support parts is obliquely arranged on the side wall of the cable trench body, and one end of the other support part is obliquely arranged on the side wall of the cable trench body, and the connection between the two support parts is connected to the cable laying frame ball joint.

6. The cable trench device according to claim 5, characterized in that: The supporting portion includes a middle portion and a connecting portion, wherein one end of the connecting portion away from the middle portion is connected to the side wall of the cable trench body, and the cross-sectional area of ​​the connecting portion gradually increases from the end connected to the middle portion to the end away from the middle portion.

7. The cable trench device according to claim 1, characterized in that: The cable laying frame comprises a vertical pole and a horizontal pole, the top end of the vertical pole is connected to the supporting pole by a ball joint, the vertical pole is vertically arranged, and the horizontal pole is perpendicular to the vertical pole.

8. The cable trench device according to claim 7, characterized in that: There are multiple cross bars, and the multiple cross bars are arranged at intervals along the length direction of the vertical rod.

9. A method for arranging a cable trench device, comprising the cable trench device according to any one of claims 1 to 8, characterized in that: The arrangement method of the cable trench device comprises the following steps: Step 1: During the construction process, a trench is excavated, a drainage channel with a certain slope is assembled at the bottom of the trench, and the cable trench body is installed on the upper part of the drainage channel; wherein the cable laying frame has been installed inside the cable trench body; Step 2, laying cables on the cable laying frame and covering the drainage device; Step 3, laying a gravel layer or a granular layer on the upper part of the drainage device; Step 4: backfill the soft soil layer and the construction is completed.

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