A split cable trench

Abstract

The present invention relates to a split cable trench. The split cable trench includes a bottom plate, two side walls respectively located on the left and right sides of the bottom plate and extending in the front and rear directions, a cover plate extending in the front and rear directions, and a cable rack. The cable rack is located in the cavity formed by the two side walls and the bottom plate, and the cover plate covers the top opening of the cavity. Each side wall includes rigid support columns and flexible walls that extend in the front and rear directions, are alternately arranged and connected. The rigid support columns of the two side walls are arranged opposite to each other left and right. The cable rack includes two diagonal struts arranged in an X shape and a cross strut extending in the left and right directions. The upper end and the lower end of each diagonal strut are respectively supported on the upper part and the lower part of the rigid support columns of different side walls, and the cross strut is arranged on the two diagonal struts. The present invention has good deformation adaptability and strong vibration damping ability, and can withstand extreme traffic loads in soft soil areas.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable installation, and particularly relates to a split-type cable trench. Background Art

[0002] With the acceleration of the urbanization process in coastal areas, the construction of urban power grids has gradually shifted from traditional overhead lines to underground cable trench laying. A cable trench is an enclosing structure for cable laying, generally including a bottom plate, side walls, and a cover plate provided at the top. Specifically, the structures disclosed in Chinese Utility Model Patent "A Cable Trench" with the application number CN202120529375.2 (the authorized publication number is CN214755431U), Chinese Utility Model Patent "High-strength Lightweight Anti-corrosion Concrete-based Prefabricated Assembled Cable Trench" with the application number CN201220708780.1 (the authorized publication number is CN202989953U), etc.

[0003] If the geological conditions of the deep soft soil layer in the area are extremely unfavorable, showing characteristics such as "high groundwater level, large soil moisture content, strong compressibility, low strength, high sensitivity, and poor water permeability", it will cause the shallow buried cable trench and the internal cables to be extremely vulnerable to serious damage under the impact of heavy traffic loads, especially under the instantaneous high-intensity loads of large transport vehicles and cement mixer trucks, which will have an adverse impact on the safety and reliability of the urban power grid. The main reasons for the easy damage of the existing cable trench structure under the above conditions are as follows:

[0004] 1. The design of traditional integral cable trenches concentrates all lateral loads on the side walls of the cable trench to bear. Large transport vehicles and cement mixer trucks generally avoid the cable trench during operation. However, in soft soil areas, when instantaneous high-intensity loads are applied in the area near the cable trench, the side soil of the cable trench will undergo significant lateral deformation, resulting in local damage to the side walls of the cable trench easily under the extrusion of the soil. Once a side wall is damaged somewhere, the associated effect caused by the damage of that side wall will cause significant deformation of the entire cable trench, resulting in a large number of cables being damaged and making emergency repairs very difficult. This kind of overall damage usually requires the demolition of the entire cable trench, with high renovation costs and long construction periods, which is a common problem of integral cable trenches.

[0005] 2. Under the instantaneous impact of extreme traffic loads, the vibration damping ability of the existing cable trench is insufficient, and the cover plate and side walls are prone to brittle fracture and failure. Especially for the side wall components, since the traditional cable racks are fixed on the side walls, the deformation of the side walls will directly disturb the cable racks, resulting in the cables falling or even being damaged, affecting the operation safety. In addition, the self-weights of the cable racks and cables further increase the lateral loads borne by the side walls, weakening the integrity of the side walls. Therefore, the side walls of cable trenches in soft soil areas are extremely prone to deformation and instability, increasing the risk of structural damage.

[0006] 3. The existing cable laying racks are auxiliary components of cable trenches, and their designs are not stable. They are generally fixed on the inner sidewalls of cable trenches, which will weaken the bearing system of the cable trenches.

[0007] 4. The internal space of the cable trench is narrow, making it extremely inconvenient for workers to enter and work. Once the cable is damaged, the repair process is both cumbersome and time-consuming. Due to the intricate layout of the cables, when workers repair in a limited space, it is not only difficult to avoid adjacent cables but also lacks sufficient operating space, increasing the construction difficulty. In addition, the narrow space restricts the layout of escape routes and emergency facilities. In the event of an emergency such as electric shock or equipment failure, the safety of workers cannot be guaranteed, increasing the potential safety hazards during the construction process.

[0008] In summary, there is an urgent need to develop a new type of cable trench structure with good deformation adaptability, strong vibration damping ability, easy to maintain, and capable of withstanding extreme traffic loads in soft soil areas. Summary of the Invention

[0009] The first technical problem to be solved by the present invention is, in view of the above-mentioned current situation of the prior art, to provide a split-type cable trench with good deformation adaptability and strong vibration damping ability, so as to be able to withstand extreme traffic loads in soft soil areas.

[0010] The second technical problem to be solved by the present invention is, in view of the current situation of the prior art, to provide a split-type cable trench that is convenient for cable maintenance.

[0011] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a split-type cable trench, comprising:

[0012] A bottom plate, and the length direction of the bottom plate is defined as the front-back direction, and the width direction of the bottom plate is defined as the left-right direction;

[0013] Two sidewalls extending in the front-back direction, which are vertically arranged on the left and right sides of the bottom plate respectively, and a cavity with an open top is formed between the two sidewalls and the bottom plate;

[0014] A cover plate extending in the front-back direction, covering the open top of the cavity;

[0015] A cable rack, arranged in the cavity;

[0016] It is characterized in that:

[0017] The sidewalls include rigid support columns and flexible walls that are alternately arranged and connected in the front-back direction, and the rigid support columns of the two sidewalls are arranged opposite to each other on the left and right;

[0018] The cable rack includes:

[0019] Two diagonal braces arranged in an X shape; wherein, for each diagonal brace, the upper end and the lower end of the diagonal brace are respectively supported on the upper part and the lower part of rigid support columns on different side walls;

[0020] A cross brace extending in the left - right direction, arranged on the two diagonal braces, for supporting cables.

[0021] The flexible wall is made of flexible materials and is not likely to rupture due to deformation during the process of resisting the soil load on the side wall, resulting in water leakage or even complete damage inside the cable trench. Thus, the possibility of water seepage caused by side wall cracking is significantly reduced, and the protection performance inside the cable trench is improved. There are various choices for the material of the flexible wall, such as existing flexible foam concrete, fiber - reinforced geotextile reinforcement systems, polymer matrix hybrid fiber materials, etc.

[0022] In the side wall of the present invention, the flexible wall mainly bears the deformation, while the rigid support columns play a role in ensuring the stability of the overall structure. The cover plate is covered on the top of the flexible wall and the rigid support columns, effectively improving the integrity of the cable trench and the collaborative working ability of each component, and enhancing the stability and impact resistance of the entire system.

[0023] Meanwhile, in addition to supporting the cables, the cable rack whose end is supported on the rigid support column in the present invention can also jointly bear the external load with the rigid support column, further enhancing the stability and structural reliability of the cable trench. Under the action of extreme traffic loads, each component of the cable trench can effectively share the load and reduce the stress concentration of the cable trench structure.

[0024] Moreover, components such as the cover plate, bottom plate, cable rack, and flexible wall of the present invention can all be mass - produced and then assembled, improving the construction efficiency and reducing the construction period and cost.

[0025] To better restrain the ends of the diagonal braces, preferably, the upper end of the rigid support column extends into the cavity to form an inverted L - shaped first clamping angle for the upper end of the diagonal brace to support;

[0026] The position where the lower part of the rigid support column contacts the bottom plate extends into the cavity to form an L - shaped second clamping angle for the lower end of the diagonal brace to support.

[0027] The cross - sectional shape design of the above - mentioned rigid support column can have various forms, such as arc - shaped, rectangular, composite shape, etc.

[0028] Preferably, the cross - sectional area of the rigid support column gradually increases from top to bottom. Thus, the soil - retaining ability of the rigid support column is improved.

[0029] In the above solution, to avoid water accumulation in the cavity, preferably, the upper plate surface of the bottom plate is an inclined surface that is lower in the middle and higher on the left and right sides, and a drainage hole penetrating the plate thickness is provided in the middle of the bottom plate. Thus, the water in the cavity can be discharged from the drainage hole at the lower position.

[0030] Furthermore, notches are provided at the positions corresponding to each rigid support column on the left and right sides of the bottom plate for the corresponding rigid support columns to be constrained therein. The shape of the notch matches the shape of the rigid support column, enabling a tight connection between the bottom plate and the rigid support column.

[0031] Even further, the lower end of the rigid support column is located below the bottom plate. In actual application, the position of the lower end of the rigid support column is deeper than the buried depth of the bottom plate, and the larger embedding depth of the rigid support column further improves the stability of the rigid support column.

[0032] In each of the above solutions, preferably, there are at least two cross braces, and the cross braces are arranged at intervals in the vertical direction, and at least one end of at least one cross brace is in contact with the inner side surfaces of the corresponding rigid support columns of the two side walls. Thus, while the cross brace can support the cable, both the cross brace and the diagonal brace can jointly bear the external load with the rigid support column, further enhancing the stability and reliability of the load-bearing system.

[0033] If only one end of the cross brace is in contact with the inner side surfaces of the corresponding rigid support columns of the two side walls, at this time, preferably, the cross brace is located below the central intersection of the two diagonal braces. The reason is that the pressure of the lower soil is relatively large, and the load borne by the lower part of the side wall is relatively large. The cross brace located below the central intersection of the diagonal braces can jointly bear the external load with the rigid support column.

[0034] To further solve the above second technical problem, preferably, the intersection of the two diagonal braces is rotatably connected through a rotating shaft extending in the front and rear directions, and the length of each diagonal brace is adjustable; each cross brace is respectively arranged on the upper and lower sides of the rotating shaft, and the length of each cross brace is adjustable. Thus, when a local damage occurs to the cable trench, if the cable has enough moving space, the cable rack can be lifted to the ground as a whole by retracting the diagonal braces, facilitating the maintenance by workers; if the moving space of the cable is insufficient, after determining the position of the damaged cable, the space where the damaged cable is located can be enlarged by rotating the diagonal braces, adjusting the included angle between the two diagonal braces and the length of the cross brace, so as to facilitate the maintenance by workers without affecting other intact cables.

[0035] And the cable rack of the present invention can match cavities of different sizes through the rotation and length adjustment of the two diagonal braces and the length adjustment of the cross braces, having a wider adaptability and flexibility.

[0036] To achieve adjustable length of the diagonal strut, the diagonal strut is a telescopic structure and its length can be manually fixed. The telescopic structure can have various forms, such as the existing sleeve-type telescopic structure, spiral telescopic structure, rack and pinion telescopic structure, spring lock-type telescopic structure, etc.

[0037] Similarly, to achieve adjustable length of the cross strut, the structural design of the diagonal strut can be referred to.

[0038] To make the length of the cross strut adjustable and not affect the connection between the cross strut and the diagonal strut, further, each cross strut includes a first rod body and a second rod body. The first ends of the first rod body and the second rod body are respectively rotatably connected to the corresponding diagonal strut and the rotation axes extend forward and backward. The second ends of the first rod body and the second rod body are constrained together in a detachable manner, so that the first rod body and the second rod body are horizontally arranged between the two diagonal struts as a whole, and the length of at least one of the first rod body and the second rod body at the same height is adjustable;

[0039] At least one of the cross struts further includes two third rod bodies with adjustable lengths. The first ends of the two third rod bodies are respectively rotatably connected to the corresponding diagonal strut and the rotation axes extend forward and backward. The second ends of the two third rod bodies are free ends and are used to contact the inner sides of the rigid support columns of the corresponding two side walls. In this way, the length adjustment can be achieved through the rotation, telescoping and connection of each rod body, which is convenient for operation.

[0040] In the present invention, the rotational connection structure between the two diagonal struts and the rotational connection structure between the rod body forming the cross strut and the diagonal strut can refer to the existing structural designs, such as double universal joint design, coaxial bearing design, double axis design, gear-type synchronous rotation design, etc.

[0041] The diagonal strut and the cross strut of the present invention are preferably rigid members.

[0042] The second end of the first rod body and the second end of the second rod body of the present invention can be detachably connected by existing means such as clamping.

[0043] In the above-mentioned various solutions, preferably, the cover plate has a damping layer located at the upper part and a rigid support layer located at the lower part. The rigid support layer is arranged close to the top opening of the cavity. Thus, the cover plate of the present invention can not only effectively absorb and buffer vibrations, but also effectively bear the upper load and prevent the cable trench from being damaged under the action of instantaneous extreme cyclic loads.

[0044] Compared with the prior art, the advantages of the present invention are as follows:

[0045] First, in the split cable trench of the present invention, the side walls on the left and right sides of the cable trench bottom plate each include rigid support columns and flexible walls that are alternately arranged and connected in the front-back direction. Since the flexible wall is made of a flexible material, it is not prone to cracking due to deformation during the process of resisting the soil load on the side wall, which may lead to water leakage or even complete damage inside the cable trench. Thus, the possibility of water seepage caused by side wall cracking of the cable trench is significantly reduced, and the internal protection performance of the cable trench is improved.

[0046] Secondly, the flexible wall in the side wall of the present invention mainly bears the deformation, while the rigid support columns play a role in ensuring the stability of the overall structure. By covering the flexible wall and the rigid support columns with a cover plate, the integrity of the cable trench and the collaborative working ability of each component are effectively improved, and the stability and impact resistance of the entire system are enhanced.

[0047] Meanwhile, in addition to supporting the cables, the cable rack of the present invention can also jointly bear the external load with the rigid support columns when the end of the cable rack is supported on the rigid support columns, further enhancing the stability and structural reliability of the cable trench. Under the action of extreme traffic loads, each component of the cable trench can effectively share the load and reduce the stress concentration in the cable trench structure.

[0048] Moreover, components such as the cover plate, bottom plate, cable rack, and flexible wall of the present invention can all be mass-produced and then assembled, which improves the construction efficiency and reduces the construction period and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 FIG. is a schematic structural diagram of the assembled cover plate, side wall, and cable rack according to an embodiment of the present invention;

[0050] Figure 2 FIG. is a schematic structural diagram of the assembled cover plate, side wall, and bottom plate according to an embodiment of the present invention;

[0051] Figure 3 FIG. is a partial structural diagram of the bottom plate according to an embodiment of the present invention;

[0052] Figure 4 FIG. is a partial structural diagram of the bottom plate and side wall according to an embodiment of the present invention;

[0053] Figure 5 FIG. is a structural diagram of the cover plate according to an embodiment of the present invention;

[0054] Figure 6 FIG. is a structural diagram of the cable rack according to an embodiment of the present invention (each rod body is combined into a cross brace);

[0055] Figure 7 FIG. is a structural diagram of the cable rack according to an embodiment of the present invention (each cross brace is disassembled into multiple rod bodies). DETAILED DESCRIPTION OF THE INVENTION

[0056] The present invention is further described in detail below with reference to the accompanying drawings.

[0057] like Figures 1 to 7 As shown, a preferred embodiment of a split cable trench of the present invention is shown, and the split cable trench includes a bottom plate 1, a side wall 2, a cover plate 3 and a cable rack 4.

[0058] The length direction of the bottom plate 1 is the front-to-back direction, and the width direction of the bottom plate 1 is the left-to-right direction. The upper plate surface of the bottom plate 1 is an inclined surface with a lower middle and higher left and right sides, and a drainage hole 11 penetrating the thickness of the plate is provided in the middle of the bottom plate 1. There are multiple drainage holes 11 and they are spaced apart in the front-to-back direction.

[0059] Two side walls 2 extending in the front-to-back direction are arranged vertically on the bottom plate 1, one on the left and one on the right, and a cavity C with an open top is formed between the two side walls 2 and the bottom plate 1. Each side wall 2 is composed of rigid support columns 21 and flexible walls 22 that are alternately arranged and connected in the front-to-back direction. The flexible wall 22 can be made of existing flexible foam concrete, fiber-reinforced geotextile reinforcement system, polymer matrix mixed fiber material, etc. The rigid support columns 21 of the two side walls 2 are arranged opposite to each other, one on the left and one on the right, and are located on the left and right sides of the bottom plate 1 and corresponding to the positions of each rigid support column 21. Figure 3 , 4 As shown. The shape of the notch 12 is a rectangle consistent with the cross-sectional shape of the corresponding rigid support column. The rigid support column 21 is constrained in the corresponding notch 12, and the lower end of the rigid support column 21 is located on the lower side of the base plate 1, so that the position of the lower end of the rigid support column 21 is deeper than the buried depth of the base plate 1 in the ground in actual application, so as to improve the stability of the rigid support column 21. In this embodiment, the number of rigid support columns 21 and flexible walls 22 forming each side wall 2 can be designed according to the length of the cable trench. At the same time, the cross-sectional area of ​​each rigid support column 21 gradually increases from top to bottom, and the upper end of each rigid support column 21 extends into the cavity to form an inverted L-shaped first clamping angle 211, and the lower part of each rigid support column 21 The contact position with the base plate 1 extends into the cavity to form an L-shaped second clamping angle 212.

[0060] In this embodiment, the rigid support column 21 is a cast-in-place concrete column, and the rigid support column 21 and the flexible wall 22 of each side wall 2 are not completely rigidly connected, that is, the connection between the rigid support column 21 and the flexible wall 22 allows a certain degree of deformation when subjected to force, but it is not completely free to move. This connection method is between the rigid connection and the flexible connection and has a certain degree of rotational rigidity. All component connections are sealed and waterproofed. Figure 1 , 2As shown, the cover plate 3 extending in the front-back direction is simultaneously disposed on the tops of the rigid support columns 21 forming the two side walls 2 and the flexible wall 22, so as to close the top opening of the cavity C while the cover plate 3 and the rigid support columns 21 and the flexible wall 22 form an integral body to jointly bear external loads. And as Figure 5 shown, the cover plate 3 has a vibration damping layer 31 located at the upper part for absorbing and buffering vibrations and a rigid support layer 32 located at the lower part for resisting upper loads. The vibration damping layer 31 can adopt existing buffer and vibration damping materials, and the rigid support layer 32 is disposed close to the top opening of the cavity C.

[0061] As Figure 1 、 6 、Figure 7 shows, the above-mentioned cable rack 4 is disposed in the cavity C. The cable rack 4 includes rigid diagonal braces 41 and cross braces 42. There are two diagonal braces 41, which are inclined upward from left to right and from right to left respectively. The centers of the two diagonal braces 41 are cross-arranged in an X shape, and the upper ends of the two diagonal braces 41 are respectively supported in the first clamping corners 211 at the upper ends of the rigid support columns 21 of the corresponding two side walls 2, and the lower ends of the two diagonal braces 41 are respectively supported in the second clamping corners 212 at the contact positions of the rigid support columns 21 of the corresponding two side walls 2 and the bottom plate 1. At the same time, the central intersection of the two diagonal braces 41 is rotationally connected through a rotating shaft 411 extending in the front-back direction, so that the included angle between the two diagonal braces 41 is adjustable. And the length of each diagonal brace 41 is adjustable. Specifically, each diagonal brace 41 is a telescopic structure and can be artificially fixed in length. The design of the telescopic structure can have various forms, such as sleeve-type telescopic design, screw-type telescopic design, rack-and-pinion type telescopic design, and spring buckle type telescopic design, etc. Thus, the ends of the two diagonal braces 41 can be supported in cavities with arbitrary heights and widths to be applicable to cable trenches of arbitrary sizes.

[0062] There are four cross braces 42 extending in the left-right direction. Two of them are arranged at intervals, one above the other, on the upper part of the two diagonal braces 41, and the other two are arranged at intervals, one above the other, on the lower part of the two diagonal braces 41 for supporting cables. In this embodiment, the cross braces 42 located at the upper and lower parts of the diagonal braces 41 are symmetrically arranged with the rotating shaft 411 as the center. In this embodiment, the two cross braces 42 located at the upper part of the diagonal brace 41 are taken as an example for description, and these two cross braces 42 are denoted as the first cross brace located on the upper side and the second cross brace located on the lower side of the first cross brace, specifically as follows:

[0063] As Figure 6 、 7As shown, the first cross brace is located between two diagonal braces 41 and is arranged in a triangle with the two diagonal braces 41. The first cross brace includes a first rod body 421 and a second rod body 422. The first end of the first rod body 421 and the first end of the second rod body 422 are respectively rotatably connected to the corresponding diagonal braces 41 (the rotational connection positions of the first and second rod bodies and the diagonal braces 41 are at the same height), and the rotational axis extends in the front-back direction. The second ends of the first rod body 421 and the second rod body 422 are both free ends and are detachably constrained together by means such as clamping, so that the first rod body 421 and the second rod body 422 are horizontally placed between the two diagonal braces 41 as a whole, and at least one of the first rod body 421 and the second rod body 422 at the same height is adjustable in length. The length adjustment method refers to the telescopic structure design of the diagonal brace 41 and will not be elaborated here.

[0064] The middle structure of the second cross brace is the same as that of the above-mentioned first cross brace, which is horizontally placed between two diagonal braces 41 and is arranged in a triangle with the two diagonal braces 41. And the middle structure also includes a first rod body 421 and a second rod body 422. The telescopic structures of the first rod body 421 and the second rod body 422 and the connection structure with the diagonal braces are the same as those of the above-mentioned first cross brace and will not be elaborated here. There are also length-adjustable third rod bodies 423 on the left and right sides of the second cross brace. The first ends of the two third rod bodies 423 are respectively rotatably connected to the corresponding diagonal braces 41 (the rotational connection positions of the third rod bodies 423 and the diagonal braces 41 are at the same height as the rotational connection positions of the first and second rod bodies of this second cross brace and the diagonal braces 41), and the rotational axis extends in the front-back direction. The second ends of the two third rod bodies 423 are free ends and are used to contact the inner sides of the rigid support columns 21 of the corresponding two side walls 2. In this embodiment, there can be various forms of the rotational connection structure between the third rod body 423 and the diagonal brace 41, such as existing mechanical locking rotation design, friction plate rotation design, etc. The above-mentioned rotation and fixation design can make the third rod body 423 in a horizontal state extending in the left-right direction, so as to realize the laying of cables. The cross braces and diagonal braces in contact with the rigid support columns 21 enable the cable rack of this embodiment to jointly bear external loads with the rigid support columns 21, further enhancing the stability of the bearing system.

[0065] The number of cable racks 4 in this embodiment can be designed according to actual situations. Each cable rack 4 is arranged at intervals in the front-back direction in the cavity and cooperates with the corresponding rigid support column 21.

[0066] The beneficial effects of the split cable trench of the present invention are as follows:

[0067] Stability of the bearing system and deformation concentration of the flexible sidewall: The split design of the present invention ensures the stability of the rigid support columns 21, thus ensuring that the flexible wall 22 mainly bears the deformation, while the rigid support columns 21 play a role in ensuring the overall stability. The cover plate 3 is tightly buckled on the upper parts of the flexible wall and the rigid support columns, effectively improving the integrity and collaborative working ability of the bearing system, and enhancing the stability and impact resistance of the system.

[0068] Enhancing the stability of the bearing system: The cable rack of the present invention is incorporated into the cable trench bearing system. The cable rack, together with the retractable diagonal braces, cross braces and rigid support columns, jointly bears the external load, further enhancing the stability and reliability of the bearing system. Under the action of extreme traffic loads, the system can effectively share the load and reduce the stress concentration of the cable trench structure, thereby improving safety.

[0069] 3. Freely adjustable cable rack design: When a local part of the cable trench is damaged, if the cable has enough moving space, the cable rack can be lifted to the ground as a whole by rotating and telescoping the diagonal braces, facilitating maintenance by workers. If the cable has insufficient moving space, after determining the position of the damaged cable, by adjusting the angle between the two diagonal braces and the cross braces, the space where the damaged cable is located can be enlarged, facilitating subsequent maintenance without affecting other intact cables.

[0070] 4. Strong adaptability of the telescopic rigid cable rack: The telescopic rigid cable rack can be flexibly adjusted through the rotation design and the telescopic design of the retractable symmetric diagonal braces, ensuring that the cable rack can be firmly clamped inside cable trenches of any height and width, thus being applicable to cable trenches of different sizes and providing greater adaptability and flexibility.

[0071] 5. Vibration damping cover plate: The cover plate of the present invention can not only effectively absorb and buffer vibrations, but also resist the impact of the upper load, preventing the cable trench from cracking and failing under the action of instantaneous extreme cyclic loads.

[0072] 6. Flexible wall design: The flexible wall of the cable trench of the present invention has good ductility and is not easy to crack, thus significantly reducing the possibility of water seepage caused by sidewall cracking and improving the protection performance inside the cable trench.

[0073] 7. Assembled mass production: Components such as the vibration damping cable trench cover, telescopic rigid cable rack, flexible sidewall of the cable trench, and cable trench bottom plate of the present device can all be mass-produced. The assembled design significantly improves the construction efficiency, reduces the construction period and cost.

[0074] In the description and claims of the present invention, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention. However, the use of these terms herein is only for the purpose of convenience in description and is determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions should be regarded as illustrative rather than restrictive. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0075] In the description and claims of the present invention, the term "vertical" is also used, which means substantially along the up and down direction, not limited to merely the vertical direction, and may also be slightly inclined relative to the vertical direction.

Claims

1. A split cable trench, comprising: A bottom plate (1), wherein the length direction of the bottom plate (1) is the front-to-back direction, and the width direction of the bottom plate (1) is the left-to-right direction; Two side walls (2) extending in the front-to-back direction are respectively arranged vertically on the bottom plate (1) on the left and the right, and the two side walls (2) and the bottom plate (1) together form a container cavity (C) with an open top; A cover plate (3) extending in the front-to-back direction and covering the top opening of the cavity (C); A cable rack (4) is arranged in the cavity (C); Features: The side wall (2) comprises rigid support columns (21) and flexible walls (22) which are alternately arranged and connected along the front-to-back direction, and the rigid support columns (21) of the two side walls (2) are arranged opposite to each other, one on the left and one on the right; The cable rack (4) comprises: Two diagonal bracing rods (41) are arranged crosswise in an X shape; wherein, for each diagonal bracing rod (41), the upper end and the lower end of the diagonal bracing rod (41) are respectively supported on the upper part and the lower part of the rigid support column of different side walls; the intersection of the two diagonal bracing rods (41) is rotatably connected via a rotating shaft (411) extending forward and backward, and the length of each diagonal bracing rod (41) is adjustable; A horizontal support rod (42) extending in the left-right direction is arranged on the two diagonal support rods (41) and is used to support the cable; There are at least two cross braces (42), each cross brace (42) is correspondingly arranged on the upper and lower sides of the rotating shaft (411), and the length of each cross brace (42) is adjustable.

2. The split cable trench according to claim 1, characterized in that: The upper end of the rigid support column (21) extends toward the interior of the cavity (C) to form a first clamping angle (211) in an inverted L shape for supporting the upper end of the diagonal support rod (41); The lower part of the rigid support column (21) extends toward the interior of the cavity (C) at a position where it contacts the bottom plate to form an L-shaped second clamping angle (212) for supporting the lower end of the diagonal support rod (41).

3. The split cable trench according to claim 1, characterized in that: The cross-sectional area of ​​the rigid support column (21) gradually increases from top to bottom.

4. The split cable trench according to claim 1, characterized in that: The upper surface of the bottom plate (1) is an inclined surface which is lower in the middle and higher on the left and right sides, and a drainage hole (11) penetrating the thickness of the plate is provided in the middle of the bottom plate (1).

5. The split cable trench according to claim 1, characterized in that: Notches (12) are provided on the left and right sides of the bottom plate (1) at positions corresponding to the rigid support columns (21) so that the corresponding rigid support columns (21) can be constrained therein.

6. The split cable trench according to claim 5, characterized in that: The lower end of the rigid support column (21) is located on the lower side of the base plate (1).

7. The split cable trench according to any one of claims 1 to 6, characterized in that: The transverse braces (42) are arranged at intervals in the up-down direction, and both ends of at least one of the transverse braces (42) are in contact with the inner side surfaces of the corresponding rigid support columns (21) of the two side walls (2).

8. The split cable trench according to any one of claims 1 to 6, characterized in that: The cover plate (3) comprises a vibration-damping layer (31) located at an upper portion and a rigid supporting layer (32) located at a lower portion.

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