A cable trough

Abstract

The present invention provides a cable trough, which relates to the field of railway engineering. The cable trough includes: a trough-shaped structure, which is formed with a receiving trough for laying cables and a first drain hole that communicates the bottom of the receiving trough to the outside of one side of the trough-shaped structure; a transition structure, which is connected to the trough-shaped structure and is located below the trough-shaped structure, and a second drain hole that penetrates both sides of the transition structure is formed on the transition structure; an anti-filter drainage structure, which is connected to the lower part of the transition structure; an anti-filter layer, which is at least arranged on both sides of the transition structure to cover both ends of the second drain hole. By integrally prefabricating the trough-shaped structure, the transition structure and the anti-filter drainage structure, the integrity of the cable trough is improved, the construction process of the cable trough is made simple and convenient, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of railway engineering, and in particular to a cable trough. Background Art

[0002] Railway subgrade cable troughs are usually arranged on the road shoulders for placing numerous power, communication, signal and other cables. The current common practice is that after the subgrade filling is completed, a cable trough space is cut out on the surface layer of the subgrade bed. First, a layer of medium-coarse sand sandwich composite geomembrane waterproof layer is laid at the bottom of the cut-out space, then a washed gravel drainage layer is laid on it. Secondly, a non-woven fabric-wrapped drainage geonet filter layer is arranged on both sides of the medium-coarse sand layer and the gravel drainage layer. Then, a cable trough body is arranged on the upper part of the gravel drainage layer. At the same time, the gap between the side of the cable trough body close to the track and the surface of the subgrade bed is filled with C15 concrete not less than. A PVC drain pipe is arranged at one place per meter along the longitudinal direction of the line on the side wall of the cable trough body close to the road shoulder, which is communicated with the drain pipe of the concrete precast shoulder. The traditional cable trough construction process has many procedures, the interfaces between the procedures are complex, and it is easy to have the phenomenon of missing installation and wrong installation. Moreover, the construction space is narrow, mainly manual operation, which consumes a lot of manpower and time. Summary of the Invention

[0003] In view of this, the main purpose of the embodiments of the present invention is to provide a cable trough to solve the problems of complex procedures and low construction efficiency in the construction process of the cable trough.

[0004] To solve the above technical problems, the embodiments of the present invention provide a cable trough, which includes: a trough-shaped structure, forming a receiving trough for laying cables and a first drain hole communicating the bottom of the receiving trough to the outside of one side of the trough-shaped structure; a transition structure, connected to the trough-shaped structure and located below the trough-shaped structure, and a second drain hole penetrating both sides of the transition structure is formed on the transition structure; an anti-filter drainage structure, connected to the lower part of the transition structure; an anti-filter layer, at least arranged on both sides of the transition structure to cover both ends of the second drain hole.

[0005] Further, the bottom of the receiving trough forms an inclined drainage slope, and the first drain hole is arranged along the inclined direction of the drainage slope.

[0006] Further, a plurality of the first drain holes are arranged at intervals along the length direction of the trough-shaped structure.

[0007] Further, the cable trough body further includes a closed net arranged at the end of the first drain hole on the side of the trough-shaped structure.

[0008] Further, there are a plurality of the second drain holes, and one end of the plurality of second drain holes is arranged higher than the other end in an inclined manner.

[0009] Furthermore, the filter drainage structure is an integral composite filter layer.

[0010] Furthermore, the trough-shaped structure includes side plates and a trough body forming the accommodation trough, the transition structure includes a first transition layer and a second transition layer, and the filter drainage structure includes a first filter drainage layer and a second filter drainage layer;

[0011] The side plates and the first transition layer are integrally prefabricated, the first filter drainage layer is connected to the lower part of the first transition layer, and the side plates, the first transition layer, and the first filter drainage layer are connected together to form an outer wall structure;

[0012] The trough body and the second transition layer are integrally prefabricated, the second filter drainage layer is connected to the lower part of the second transition layer, and the trough body, the second transition layer, and the second filter drainage layer are connected together to form an intermediate structure;

[0013] The two outer wall structures are detachably connected to both sides of at least one of the intermediate structures respectively;

[0014] The first water discharge hole communicates the trough body of the intermediate structure to the outside of the side plates of one side of the outer wall structure;

[0015] The second water discharge hole penetrates through the first transition layer and the second transition layer.

[0016] Furthermore, there are at least two intermediate structures, and two adjacent intermediate structures are detachably connected.

[0017] Furthermore, the outer wall structure is detachably connected to the intermediate structure and between two adjacent intermediate structures through a tooth groove structure.

[0018] Furthermore, the tooth groove structure includes a first tooth groove and a second tooth groove that are mutually adapted, one of the first tooth groove and the second tooth groove is formed on the outer wall structure, and the other of the first tooth groove and the second tooth groove is formed on the side of the intermediate structure corresponding to the outer wall structure;

[0019] Or, the first tooth groove and the second tooth groove are respectively formed on both sides of the intermediate structure, and the first tooth groove or the second tooth groove adapted to the intermediate structure on the corresponding side is formed on the outer wall structure.

[0020] A cable trough provided by an embodiment of the present invention includes a trough-shaped structure, a transition structure, a filter drainage structure, and a filter layer. Among them, by integrally prefabricating the trough-shaped structure, the transition structure, and the filter drainage structure, and then connecting the filter layer to both sides of the transition structure, the integrity of the cable trough is increased, making the construction process of the cable trough simple and convenient, and saving time. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for use in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0022] Figure 1 Schematic diagram of the installation structure of the cable trough for the embodiment of the present application;

[0023] Figure 2 For Figure 1 The left view of the cable trough in

[0024] Figure 3 For Figure 1 The partial enlarged schematic diagram at position A in

[0025] Figure 4 Schematic diagram of the cable trough assembly for the embodiment of the present application;

[0026] Figure 5 For Figure 4 The cross-sectional view in the B-B direction in , which shows the shoulder; and

[0027] Figure 6 For Figure 5 The exploded view of

[0028] Explanation of reference numerals

[0029] 1 - Groove structure, 2 - Transition structure, 3 - Anti - filtration drainage structure, 4 - Anti - filtration layer, 5 - Enclosure net, 6 - Outer wall structure, 7 - Intermediate structure, 8 - Tooth groove structure, 9 - Shoulder, 1a - Side plate, 1b - Trough body, 11 - Accommodation groove, 111 - Drainage slope, 12 - First water discharge hole, 21 - Second water discharge hole, 31 - Permeable layer, 32 - Drainage layer, 33 - Impermeable layer, 2a - First transition layer, 2b - Second transition layer, 3a - First anti - filtration drainage layer, 3b - Second anti - filtration drainage layer, 81 - First tooth groove, 82 - Second tooth groove, 91 - Shoulder first water discharge hole, 92 - Shoulder second water discharge hole, 10 - Cover plate. Detailed implementation manners

[0030] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the following further details the present invention in combination with the accompanying 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.

[0031] Each specific technical feature described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different embodiments and technical solutions can be formed by combining different specific technical features. To avoid unnecessary repetition, various possible combination methods of each specific technical feature in this application will not be described separately.

[0032] In the implementation records of this application, it should be noted that unless otherwise specified and limited, the term "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meaning of the above terms can be understood according to specific circumstances.

[0033] In the following description, the terms "first / second" involved are only used to distinguish similar objects and do not represent a specific order for the objects. It should be understood that the orientation descriptions "above" and "below" involved are the orientations in the normal use state. The length direction of the groove-shaped structure refers to the direction from one end of the groove-shaped structure to the corresponding other end, that is, along the laying direction of the cable in the receiving groove.

[0034] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0035] A cable trough provided in an embodiment of the present application can be used in railway engineering and can also be used for the storage and protection of lines in other power and electrical equipment such as power grids and communication engineering. It should be noted that the application scenario type of this application does not limit this application.

[0036] The following is combined with Figure 1 Taking the cable trough of the embodiment of the present application used in railway engineering as an example for illustration, the cable trough is located on the side of the shoulder 9 close to the railway track. The receiving groove 11 of the cable trough is used to place the cable. The first drain hole 12 on the groove-shaped structure 1 is connected to the first shoulder drain hole 91 of the shoulder 9 to drain the accumulated water in the receiving groove 11 from the shoulder side. The second drain hole 21 diverts the accumulated water on one side of the railway track to the second shoulder drain hole 92 for drainage. The cover plate 10 on the upper part of the cable trough is used to cover the receiving groove 11 to protect the upper part of the cable trough.

[0037] In the embodiment of the present application, as Figure 1As shown, the cable trough includes a trough structure 1, a transition structure 2, a filter and drainage structure 3 and a filter layer 4. The trough structure 1, the transition structure 2, the filter and drainage structure 3 and the filter layer 4 form an integral structure, which is convenient for the overall lifting and installation of the cable trough.

[0038] The trough structure 1 comprises a receiving groove 11 for laying cables, and a first drainage hole 12 connecting the bottom of the receiving groove 11 to the exterior of one side of the trough structure 1. Specifically, the cross-section of the trough structure 1 is U-shaped or comprises multiple U-shaped shapes arranged side by side. The length, height, and width of the trough structure 1 can be determined based on actual project requirements. One side of the first drainage hole 12 is connected to the receiving groove 11, and the other side is connected to the exterior of the trough structure 1. The first drainage hole 12 can be formed by pre-installing a PVC pipe during the cable trough prefabrication process. The diameter of the first drainage hole 12 can be 0.05m.

[0039] The transition structure 2 is connected to the trough structure 1 and is located below the trough structure 1. A second drain hole 21 is formed on the transition structure 2, extending through both sides of the transition structure 2. Specifically, the transition structure 2 and the trough structure 1 are prefabricated as a single unit using reinforced concrete. One end of the second drain hole 21 is located on one side of the transition structure 2, and the other end is located on the other side of the transition structure 2. The entire second drain hole 21 axially extends through both sides of the transition structure 2. The second drain hole 21 can be implemented by pre-buried PVC pipes during the prefabrication process. The diameter of the second drain hole 21 can be 0.01m.

[0040] The filter and drainage structure 3 is connected to the lower part of the transition structure 2. The filter and drainage structure 3 includes filter material and drainage material. The filter and drainage materials prevent debris such as mud and sand from entering the filter and drainage structure 3, while allowing water in the filter and drainage structure 3 to be quickly discharged.

[0041] The filter layer 4 is provided on at least two sides of the transition structure 2 to cover both ends of the second drainage hole 21. Specifically, the filter layer 4 is a geotextile whose main function is drainage and filtration. It can be a non-woven geotextile, a woven geotextile, or a composite geotextile. The filter layer 4 can be connected to both sides of the transition structure 2 by bonding or other means, and covers the location of the second drainage hole 21 on the transition structure 2. The filter layer 4 can cover both sides of the transition structure 2 that are parallel to the cross section of the second drainage hole 21, or it can cover the circumference of the transition structure 2.

[0042] In an embodiment of the present application, the cable trough includes a trough structure, a transition structure, a filter and drainage structure, and a filter layer. The trough structure, the transition structure, and the filter and drainage structure are prefabricated as an integrated whole, and the filter layer is arranged on both sides of the transition structure, so that the cable trough forms an integral structure. The construction process is simple and convenient, saving time. At the same time, factory prefabrication can monitor and record each process of the production process, effectively control the quality of the cable trough, and achieve traceability of individual cable troughs.

[0043] In some embodiments of the present application, as Figure 1 shown, an inclined drainage slope 111 is formed at the bottom of the accommodation groove 11, and the first drain hole 12 is arranged along the inclined direction of the drainage slope 111. Specifically, the drainage slope 111 forms a set angle with the horizontal plane, and the tangent value of the set angle, i.e., the slope, is not less than 2%. The first drain hole 12 communicates with the lower side of the drainage slope 111, and the axis of the first drain hole 12 forms a set angle with the horizontal plane. The tangent value of this set angle, i.e., the slope, is preferably 4%, and it can also be reduced according to the actual terrain conditions.

[0044] In the embodiments of the present application, by forming a drainage slope at the bottom of the accommodation groove and arranging the first drain hole along the inclined direction of the drainage slope, the accumulated water in the accommodation groove can be more easily drained out of the cable trench.

[0045] In some embodiments of the present application, as Figure 2 shown, a plurality of first drain holes 12 are arranged at intervals along the length direction of the trough-shaped structure 1. Specifically, the number of the first drain holes 12 can be determined according to different length values of the trough-shaped structure 1. The length of a single-section trough-shaped structure 1 can be 1 m or 0.5 m.

[0046] In the embodiments of the present application, by arranging a plurality of first drain holes at intervals along the length direction of the trough-shaped structure, the accumulated water in the accommodation groove can be drained out of the cable trench faster.

[0047] In some embodiments of the present application, as Figure 2 shown, the cable trench further includes a closing net 5 arranged at one end of the first drain hole 12 on one side of the trough-shaped structure 1. Specifically, the closing net 5 can be a mesh structure formed by hot-dip galvanized iron wires arranged vertically and horizontally. The closing net 5 needs to cover at least the first drain hole 12. The shape of the closing net 5 can be square, circular or other shapes. The closing net 5 can be preset in the trough-shaped structure 1 or connected to the surface of the trough-shaped structure 1 close to the shoulder 9.

[0048] In the embodiments of the present application, by arranging a closing net at one end of the first drain hole on one side of the trough-shaped structure, the cables placed in the cable trench can be protected, and small animals such as snakes and rats can be prevented from entering the cable trench to damage the cables.

[0049] In some embodiments of the present application, as Figure 1 and Figure 2As shown, there are multiple second drainage holes 21, and one end of the multiple second drainage holes 21 is higher than the other end. For example, they are arranged obliquely along the direction parallel to the first drainage hole 12. Specifically, the multiple second drainage holes 21 are evenly distributed in rows inside the transition structure 2. The multiple rows of second drainage holes 21 can be arranged in alignment or staggered. The position of the end of the second drainage hole 21 far from the shoulder 9 is higher than the end close to the shoulder 9.

[0050] In the embodiment of the present application, by arranging multiple second drainage holes in the transition structure and arranging the second drainage holes obliquely, the water on the side of the cable trench far from the shoulder can be better drained to the second drainage hole of the shoulder through the cable trench, thereby achieving the protection of the cable.

[0051] In some embodiments of the present application, as Figure 3 shown, the filter drainage structure 3 is an integral composite filter layer. Specifically, for example, it is a PFF integral composite filter layer. PFF is the abbreviation of Possess Formwork Feature. The PFF integral composite filter layer includes a permeable layer 31, a drainage layer 32, and a water barrier layer 33. Among them, the permeable layer 31 can be made of one or several mixtures of natural fibers, chemical fiber non-woven fabrics, and textile woven fabrics, which can effectively prevent the loss of fine particles, quickly permeate water, and not silt up for a long time. The drainage layer 32 is a three-dimensional network material with a large porosity and a certain strength. It is spun from a thermoplastic synthetic resin as the main raw material. Under the condition that the filaments are not solidified, the filaments are rotated and the filaments are bonded to each other at multiple points to form a three-dimensional network structure, which has the characteristics of small water flow resistance, not adhering to mud and sand, organisms, etc., and strong cross-sectional water passing capacity. The water barrier layer 33 is a flexible or semi-rigid thin-layer water barrier material with a certain toughness and strength, which can be one of a PE film, a PP film, a PVC film, a wood wool board, a plastic board, or an impermeable cloth. The water barrier layer 33, the permeable layer 32, and the drainage layer 31 are formed into an integral structure by hot melt bonding, gluing, or sewing.

[0052] In the embodiment of the present application, the filter drainage structure adopts an integral composite filter layer, which improves the permeability and filtration performance of the material while maintaining the advantages of traditional infiltration and drainage filtration, enhances the integrity of the filter drainage structure, and has a simple structure and is easy to construct.

[0053] In some embodiments of the present application, as Figure 5As shown, the trough-like structure 1 includes side plates 1a and a trough body 1b formed with a receiving trough 11. The transition structure 2 includes a first transition layer 2a and a second transition layer 2b. The filter drainage structure 3 includes a first filter drainage layer 3a and a second filter drainage layer 3b. Specifically, the second drain holes 21 are distributed in the first transition layer 2a and the second transition layer 2b. Both the first filter drainage layer 3a and the second filter drainage layer 3b include filter materials and drainage materials, for example, both are PFF integral composite filter layers.

[0054] As Figure 6 shown, the side plates 1a and the first transition layer 2a are integrally prefabricated. The first filter drainage layer 3a is connected to the lower part of the first transition layer 2a. The side plates 1a, the first transition layer 2a, and the first filter drainage layer 3a are connected together to form an outer wall structure 6.

[0055] The trough body 1b and the second transition structure 2b are integrally prefabricated. The second filter drainage layer 3b is connected to the lower part of the second transition layer 2b. The trough body 1b, the second transition layer 2b, and the second filter drainage layer 3b are connected together to form an intermediate structure 7.

[0056] Two outer wall structures 6 are detachably connected to both sides of at least one intermediate structure 7 respectively; the first drain holes 12 communicate the trough body 1b of the intermediate structure 7 to the outside of the side plates 1a of one side outer wall structure 6; the second drain holes 21 penetrate through the first transition layer 2a and the second transition layer 2b.

[0057] In the embodiments of the present application, when the cable trough needs to be composed of multiple intermediate structures, the outer wall structure is set so that the two sides of the cable trough are flat and the strength is increased. At the same time, the assembled structure facilitates the transportation of the cable trough.

[0058] In some embodiments of the present application, as Figure 6 shown, there are at least two intermediate structures 7, and two adjacent intermediate structures 7 are detachably connected. Specifically, the number of intermediate structures 7 can be set to multiple according to actual needs. In the connection of multiple intermediate structures 7, it is necessary to ensure that the first drain holes 12 communicate with the receiving trough 11 formed by the trough body 1b. The lengths and heights of multiple intermediate structures 7 should be kept consistent, and the widths of multiple intermediate structures 7 can be different.

[0059] In the embodiments of the present application, multiple intermediate structures are detachably connected. For the situation where several cables with different functions cannot be placed in one receiving trough due to certain special reasons, multiple intermediate structures can be set as needed to realize the simultaneous laying of multiple functional cables.

[0060] In some embodiments of the present application, as Figure 4As shown, the outer wall structure 6 is detachably connected to the intermediate structure 7 and between two adjacent intermediate structures 7 through the tooth-groove structure 8. Specifically, the shapes of the teeth or grooves of the tooth-groove structure 8 can be both rectangular or both trapezoidal, and the depth and number of the teeth or grooves can be variable according to the design. The tooth-groove structure 8 with one or more tooth or groove shapes can be provided on the outer wall structure 6 and the intermediate structure 7.

[0061] In the embodiments of the present application, the outer wall structure, the intermediate structure, and between two adjacent intermediate structures are connected through the tooth-groove structure, achieving flexible combination and convenient installation and disassembly.

[0062] In some embodiments of the present application, as Figure 4 shown, the tooth-groove structure 8 includes a first tooth-groove 81 and a second tooth-groove 82 that are mutually adapted. One of the first tooth-groove 81 and the second tooth-groove 82 is formed on the outer wall structure 6, and the other of the first tooth-groove 81 and the second tooth-groove 82 is formed on the side of the intermediate structure 7 corresponding to the outer wall structure 6. For example, the first tooth-groove 81 or the second tooth-groove 82 is formed on both sides of the outer wall structure 6. When the number of intermediate structures 7 is 1, the first tooth-groove 81 or the second tooth-groove 82 is formed on both sides of the intermediate structure 7; when the number of intermediate structures 7 is greater than 1, the intermediate structure 7 can have the first tooth-groove 81 or the second tooth-groove 82 formed on both sides, or the first tooth-groove 81 formed on one side and the second tooth-groove 82 formed on the other side.

[0063] In the embodiments of the present application, by respectively providing the mutually engaging first tooth-groove and second tooth-groove on the intermediate structure and the outer wall structure, when the first tooth-groove or the second tooth-groove is formed on both outer wall structures simultaneously, the assembly connection between the intermediate structure and the outer wall structure is achieved.

[0064] In some embodiments of the present application, the first tooth-groove 81 and the second tooth-groove 82 are respectively formed on both sides of the intermediate structure 7, and the first tooth-groove 81 or the second tooth-groove 82 adapted to the corresponding side intermediate structure 7 is formed on the outer wall structure 6. For example, if the first tooth-groove 81 is formed on one side of the outer wall structure 6, then the second tooth-groove 82 is formed on the other side of the outer wall structure 6.

[0065] In the embodiments of the present application, by respectively providing the first tooth-groove and the second tooth-groove on both sides of the intermediate structure, and the outer wall structure is provided with the first rack or the second rack adapted to the corresponding side intermediate structure, the tooth-shaped structures on both sides of multiple intermediate structures are the same, which can increase the versatility of the intermediate structure mold.

[0066] The embodiments of the present application also provide a construction method for a cable trench. Taking the application in railway engineering as an example, it includes the following steps:

[0067] S1. Overall filling is carried out on the surface layer of the subgrade bed to form a space for laying the cable trench.

[0068] S2. Lay a layer of medium-coarse sand leveling layer, such as 4 cm thick, at the bottom of the cable trench space;

[0069] S3. Hoist a single section of the cable trench of any of the above embodiments as a whole, and place the side of the cable trench with the first drain hole 12 on the side close to the shoulder 9;

[0070] S4. Hoist multiple such cable trenches longitudinally along the line in sequence;

[0071] S5. Build a formwork for pouring the shoulder 9, place the pipe fittings of the first drain hole 91 of the shoulder at the position corresponding to the first drain hole 12 of the cable trench, place the pipe fittings of the second drain hole 92 of the shoulder at the position of the filter drainage structure 3 and the second drain hole 21 at the bottommost part, fix the above pipe fittings together with the formwork, and pour concrete to form the shoulder 9;

[0072] S6. Fill the gap between the side of the cable trench close to the track and the surface layer of the subgrade bed with concrete, for example, concrete with a grade not lower than C25.

[0073] In the embodiments of the present application, by forming a cable trench space on the subgrade bed, for example, cutting out the cable trench space after the overall filling of the subgrade bed, laying a medium-coarse sand leveling layer, hoisting multiple cable trenches along the line, arranging the first drain hole of the shoulder and the second drain hole of the shoulder, for example, using a PVC pipe with a diameter of 80 mm as the first drain hole of the shoulder and the second drain hole of the shoulder, and pouring to form the shoulder, the overall installation of the cable trench is realized, the construction process is simple and convenient, and time is saved.

[0074] The above is only the preferred embodiment of the present application and is not used to limit the protection scope of the present application.

Claims

1. A cable trough, characterized in that, Comprising: A trough-shaped structure having a receiving trough for laying cables and a first drain hole communicating the bottom of the receiving trough to the outside of one side of the trough-shaped structure; A transition structure connected to the trough-shaped structure and located below the trough-shaped structure, and having a second drain hole penetrating both sides of the transition structure formed thereon; An anti-filter drainage structure connected to the lower part of the transition structure; And An anti-filter layer provided at least on both sides of the transition structure to cover both ends of the second drain hole.

2. The cable trough according to claim 1, characterized in that, The bottom of the receiving trough forms an inclined drainage slope, and the first drain hole is arranged along the inclined direction of the drainage slope.

3. The cable trough according to claim 1, characterized in that, A plurality of the first drain holes are arranged at intervals along the length direction of the trough-shaped structure.

4. The cable trough according to claim 1, wherein, The cable trough further includes a closing net provided at the end of the first drain hole on one side of the trough-shaped structure.

5. The cable trough according to claim 1, characterized in that, There are a plurality of the second drain holes, and one end of the plurality of second drain holes is higher than the other end.

6. The cable trough according to claim 1, characterized in that, The anti-filter drainage structure is an integral composite anti-filter layer.

7. The cable trench according to any one of claims 1 to 6, characterized in that, The trough-shaped structure includes side plates and a trough body having the receiving trough formed thereon, the transition structure includes a first transition layer and a second transition layer, and the anti-filter drainage structure includes a first anti-filter drainage layer and a second anti-filter drainage layer; The side plates and the first transition layer are integrally precast, the first anti-filter drainage layer is connected to the lower part of the first transition layer, and the side plates, the first transition layer and the first anti-filter drainage layer are connected together to form an outer wall structure; The trough body and the second transition layer are integrally precast, the second anti-filter drainage layer is connected to the lower part of the second transition layer, and the trough body, the second transition layer and the second anti-filter drainage layer are connected together to form an intermediate structure; The two outer wall structures are detachably connected to both sides of at least one of the intermediate structures respectively; The first drain hole communicates the trough body of the intermediate structure to the outside of the side plates of one side of the outer wall structure; The second drain hole penetrates the first transition layer and the second transition layer.

8. The cable trough according to claim 7, characterized in that, There are at least two of the intermediate structures, and adjacent two of the intermediate structures are detachably connected.

9. The cable trough according to claim 7, characterized in that, The outer wall structure is detachably connected to the intermediate structure and between adjacent two of the intermediate structures through a tooth groove structure.

10. The cable trench according to claim 9, characterized in that, The tooth groove structure includes a first tooth groove and a second tooth groove that are mutually adapted; one of the first tooth groove and the second tooth groove is formed on the outer wall structure, and the other of the first tooth groove and the second tooth groove is formed on the side of the intermediate structure corresponding to the outer wall structure; Or, the first tooth groove and the second tooth groove are respectively formed on both sides of the intermediate structure, and the first tooth groove or the second tooth groove adapted to the corresponding side of the intermediate structure is formed on the outer wall structure.

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