Tunnel prefabricated cable trench structure

Abstract

The utility model provides a tunnel prefabricated cable trench structure which comprises a prefabricated trench wall structure and a cover plate, the cover plate comprises a first end and a second end which are oppositely arranged in the transverse direction of a tunnel, the first end is connected to the prefabricated trench wall structure, and the second end extends outwards in the transverse direction of the tunnel from the first end to a tunnel arch foot side wall. The prefabricated ditch wall structure is connected to the top of the inverted arch edge concrete, and the prefabricated ditch wall structure, the inverted arch edge concrete and the tunnel arch foot side wall jointly define a ditch-shaped structure with an upward opening. Most of the components can be produced in a factory customization mode, multiple links such as on-site formwork erecting, formwork dismounting and stirring are omitted, the construction process is faster, more flexible and more orderly, the construction period is greatly shortened, higher quality guarantee is obtained, the labor cost is saved, rapid assembly and disassembly, replacement or repair can be achieved, and the maintenance difficulty and time cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnels, in particular to a precast cable trench structure for tunnels. Background Art

[0002] With the progress of science and technology and the continuous development of the transportation industry, the precast structure, as an advanced construction method, has the following advantages: factory production enables the components to be standardized, large-scale and serialized, effectively ensuring the quality and precision of the components; the assembled construction does not require multiple processes such as on-site formwork support, removal, and mixing, effectively shortening the on-site construction period and further reducing on-site construction pollution such as noise and dust. The local adoption of precast structures in tunnels is an inevitable result of the progress of science and technology and the development of engineering practice.

[0003] At present, the cable trenches in tunnels are cast with cast-in-place concrete. Since the side of the cable trench close to the secondary lining is deformed / irregular, it is relatively difficult to splice the formwork on site. In addition, if there is local damage to the existing cable trench structure, for example, the curbstone beside the current cable trench adopts a cast-in-place structure of reinforced concrete. Due to process and on-site construction technical level limitations, the concrete at the corners of the curbstone is prone to cracking and falling off, resulting in the exposure of the steel bars, making replacement and repair difficult, time-consuming and laborious, not only affecting the appearance but also reducing the anti-collision function.

[0004] In view of this, it is necessary to propose a precast cable trench structure for tunnels to solve or at least alleviate the above defects. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a precast cable trench structure for tunnels to solve the technical problems of difficult on-site formwork splicing and low construction efficiency existing in the cable trenches of the prior art using cast-in-place concrete structures.

[0006] To achieve the above object, the utility model provides a precast cable trench structure for tunnels, including a precast trench wall structure and a cover plate; wherein, the cover plate includes a first end and a second end arranged oppositely along the transverse direction of the tunnel, the first end is connected to the precast trench wall structure, the second end extends outward along the transverse direction of the tunnel from the first end to the arch springing sidewall of the tunnel, and the precast trench wall structure is connected to the top of the inverted arch side concrete; wherein, the precast trench wall structure, the inverted arch side concrete and the arch springing sidewall of the tunnel jointly enclose a groove-shaped structure with an upward opening.

[0007] Preferably, the precast trench wall structure is connected to the top of the invert side concrete through a connecting component. The connecting component includes a bolt, a bolt sleeve and a nut. Among them, the nut and the bolt sleeve are embedded in the invert side concrete. The outer peripheral wall of the bolt sleeve is provided with an external thread for connecting the nut, and the inner peripheral wall of the bolt sleeve is provided with an internal thread for connecting the bolt. The precast trench wall structure is provided with a vertical bolt hole for the bolt to pass through. The vertical bolt hole, the bolt sleeve and the nut are arranged in one-to-one correspondence. The precast trench wall structure is connected to the inside of the bolt sleeve by the bolt passing through the vertical bolt hole, so as to connect the precast trench wall structure to the top of the invert side concrete.

[0008] Preferably, the precast trench wall structure includes an outer shell plate and an inner concrete layer. The outer shell plate is provided with a grouting hole for injecting concrete, and the concrete is filled in the outer shell plate through the grouting hole to form the inner concrete layer.

[0009] Preferably, the outer shell plate includes a curb gutter part, a trench wall part and a trench bottom part which are sequentially connected along the transverse direction of the tunnel. The top surface of the trench wall part is higher than the top surface of the curb gutter part and the top surface of the trench bottom part. The top surface of the curb gutter part is flush with the tunnel road surface. The top surface of the trench bottom part is flush with the top surface of the invert side concrete and forms the bottom of the cable trench. The grouting hole is arranged at the top of the trench wall part. The curb gutter part and the trench bottom part are both provided with the vertical bolt holes.

[0010] Preferably, it further includes an in-trench column assembly arranged inside the precast trench wall structure. The in-trench column assembly includes a plurality of columns arranged at intervals along the longitudinal direction of the tunnel. The columns are arranged on the top of the invert side concrete. The second end is lapped on the top of the columns, and the first end is lapped on the top of the trench wall part.

[0011] Preferably, it further includes a drainage component. The drainage component includes a drainage hole reserved in the precast trench wall structure. The water inlet end of the drainage hole is communicated with the bottom of the cable trench, and the water outlet end of the drainage hole is used for communicating with the existing longitudinal drainage blind ditch in the tunnel. The bottom of the cable trench has a drainage slope towards the water inlet end to drain the water in the cable trench to the existing longitudinal drainage blind ditch in the tunnel through the drainage hole.

[0012] Preferably, the drainage slope is set to 2% - 4%.

[0013] Preferably, the plurality of columns are evenly arranged at intervals along the longitudinal direction of the tunnel, and the interval distance between adjacent two columns along the longitudinal direction of the tunnel is set to 40 cm - 60 cm.

[0014] Preferably, the groove wall portion includes a first end face and a second end face oppositely arranged along the longitudinal direction of the tunnel. The first end face includes a first splicing face and a second splicing face arranged staggeredly along the longitudinal direction of the tunnel. The second end face includes a third splicing face and a fourth splicing face arranged staggeredly along the longitudinal direction of the tunnel. The first splicing face is flush with the longitudinal end face of the corresponding roadside gutter portion. The second splicing face is flush with the longitudinal end face of the corresponding bottom of the groove. The third splicing face is flush with the longitudinal end face of the corresponding roadside gutter portion. The fourth splicing face is flush with the longitudinal end face of the corresponding bottom of the groove.

[0015] Preferably, a plurality of transverse connection holes for connecting cable brackets are formed in the groove wall portion, and a plurality of cable brackets arranged at intervals in the vertical direction are installed in the cable trench.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] (1) High construction efficiency: Most components of this application can be customized and produced in factories. On the one hand, it reduces multiple links such as on-site formwork support, formwork removal, and mixing. On the other hand, it makes the construction process faster, more flexible, and more orderly, greatly shortening the construction period and obtaining higher quality assurance, saving labor costs, and promoting the development of tunnel prefabrication.

[0018] (2) Convenient maintenance: If there are local damages or maintenance is required in the precast cable trench system, it can be quickly disassembled and assembled, replaced or repaired, reducing the maintenance difficulty and time cost.

[0019] (3) Significant social benefits: The fast and efficient construction method helps to keep the road unobstructed in a timely manner and greatly shortens the construction period. Secondly, it reduces the concrete consumption of tunnel components, thus achieving the effect of carbon reduction.

[0020] (4) Application of new materials: This application can use basalt fiber materials, which maintain high strength and stiffness while reducing the structural weight, have excellent service life and long-term stability, and effectively promote scientific and technological progress and economic development. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 It is an application scenario diagram of the overall structure in an embodiment of the present utility model;

[0023] Figure 2Elevation schematic diagram of the overall structure in an embodiment of the present utility model;

[0024] Figure 3 Plan schematic diagram of the overall structure in an embodiment of the present utility model;

[0025] Figure 4 Side schematic diagram of the overall structure in an embodiment of the present utility model;

[0026] Figure 5 Schematic diagram of the structure after installing the cable bracket in an embodiment of the present utility model;

[0027] Figure 6 Schematic diagram of the structure of the cable bracket in an embodiment of the present utility model.

[0028] The realization of the object, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings.

[0029] Explanation of the reference numerals in the drawings:

[0030] 10, precast trench wall structure; 110, outer shell plate; 111, roadside gutter part; 112, trench wall part; 1121, grouting hole; 1122, first splicing surface; 1123, second splicing surface; 1124, third splicing surface; 1125, fourth splicing surface; 1126, transverse connection hole; 113, trench bottom; 1131, vertical bolt hole; 114, precast plug; 115, lapping groove; 20, cover plate; 210, first end; 220, second end; 30, connection component; 310, bolt sleeve; 320, nut; 40, column; 50, drainage hole; 60, tunnel arch springing side wall; 70, invert side concrete; 80, existing longitudinal drainage blind ditch in the tunnel; 90, cable bracket. Detailed implementation manners

[0031] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as described in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0035] Please refer to the attached Figures 1 to 6 , a tunnel precast cable trench structure in an embodiment provided by the present utility model includes a precast trench wall structure 10 and a cover plate 20; wherein, the cover plate 20 includes a first end 210 and a second end 220 which are oppositely arranged along the transverse direction of the tunnel. The first end 210 is connected to the precast trench wall structure 10, and the second end 220 extends outward from the first end 210 along the transverse direction of the tunnel to the tunnel arch springing side wall 60. The precast trench wall structure 10 is connected to the top of the invert side concrete 70; wherein, the precast trench wall structure 10, the invert side concrete 70 and the tunnel arch springing side wall 60 jointly enclose a groove-shaped structure with an upward opening. Specifically, the first end 210 can be connected to the precast trench wall structure 10 by bolts or directly lapped on the precast trench wall structure 10, and the second end 220 is lapped on, for example, a column 40.

[0036] As a preferred embodiment, the precast trench wall structure 10 is connected to the top of the invert side concrete 70 through a connecting component 30. The connecting component 30 includes bolts (not shown in the figure), bolt sleeves 310 and nuts 320. Among them, the nuts 320 and the bolt sleeves 310 are embedded in the invert side concrete 70. The outer peripheral wall of the bolt sleeve 310 is provided with external threads for connecting the nuts 320, and the inner peripheral wall of the bolt sleeve 310 is provided with internal threads for connecting the bolts. The precast trench wall structure 10 is provided with vertical bolt holes 1131 for the bolts to pass through. The vertical bolt holes 1131, the bolt sleeves 310 and the nuts 320 are arranged in one-to-one correspondence. The precast trench wall structure 10 is connected to the inside of the bolt sleeve 310 by bolts passing through the vertical bolt holes 1131, so as to connect the precast trench wall structure 10 to the top of the invert side concrete 70.

[0037] Furthermore, the precast trench wall structure 10 includes an outer shell plate 110 and an inner concrete layer (not shown in the figure). The outer shell plate 110 is provided with grouting holes 1121 for injecting concrete, and the concrete is filled in the outer shell plate 110 through the grouting holes 1121 to form the inner concrete layer. Preferably, the concrete is micro-expansion concrete, which has the advantages of good expansion performance, high durability, and strong crack resistance.

[0038] As a preferred example, the outer shell plate 110 is made of customized basalt fiber components with a thickness of 3 mm. It is used as the outer mold of the precast trench wall structure 10, and concrete is filled inside through grouting on site. Preferably, micro-expansion concrete is used. Such a design can give play to the high-strength and lightweight characteristics of the basalt fiber precast parts, with a light overall weight, which is convenient for transportation and on-site assembly.

[0039] As a preferred embodiment, as Figure 2 shown, the outer shell plate 110 includes a curb gutter part 111, a trench wall part 112, and a trench bottom part 113 that are sequentially connected along the transverse direction of the tunnel. The top surface of the trench wall part 112 is higher than the top surface of the curb gutter part 111 and the top surface of the trench bottom part 113. The top surface of the curb gutter part 111 is flush with the tunnel pavement, and the top surface of the trench bottom part 113 is flush with the top surface of the invert side concrete 70 and forms the bottom of the cable trench. The grouting holes 1121 are opened at the top of the trench wall part 112, and the vertical bolt holes 1131 are opened in both the curb gutter part 111 and the trench bottom part 113.

[0040] In this embodiment, the curb gutter of the prior art can be integrated into the outer shell plate 110, and customized components such as basalt fiber can be used. Compared with the traditional cast-in-place concrete structure, the structural strength is enhanced, and cracking and peeling are not likely to occur. The grouting holes 1121 are opened at the top of the trench wall part 112, and the longitudinal spacing is preferably 50 cm. The left groove is the curb gutter, and reserved vertical bolt holes 1131 are provided in the curb gutter part 111 and the trench bottom part 113 for on-site fixation.

[0041] As another preferred embodiment, it further includes an in-trench column assembly (not marked in the figure) arranged inside the precast trench wall structure 10. The in-trench column assembly includes a plurality of columns 40 arranged at intervals along the longitudinal direction of the tunnel. The columns 40 are arranged on the top of the invert side concrete 70, the second end 220 is lapped on the top of the columns 40, and the first end 210 is lapped on the top of the trench wall part 112. As a preferred example, the plurality of columns 40 are evenly arranged at intervals along the longitudinal direction of the tunnel, and the interval distance between two adjacent columns 40 along the longitudinal direction of the tunnel is set to 40 cm to 60 cm.

[0042] It should be noted that columns 40, preferably steel columns, are adopted inside the cable trench with a longitudinal spacing of 50 cm as the support structure for the cover plate 20. In this way, the deformed part on the right side of the cable trench can be omitted, which is convenient for operation, saves the amount of concrete used, and expands the space of the cable trench.

[0043] As a preferred embodiment, it further includes a drainage component (not shown in the figure). The drainage component includes drainage holes 50 reserved in the precast trench wall structure 10. The water inlet end of the drainage holes 50 communicates with the bottom of the cable trench, and the water outlet end of the drainage holes 50 is used to communicate with the existing longitudinal drainage ditch 80 in the tunnel. The bottom of the cable trench has a drainage slope towards the water inlet end to drain the water in the cable trench through the drainage holes 50 to the existing longitudinal drainage ditch 80 in the tunnel.

[0044] It should be noted that as Figure 1 shown, a transverse slope of 2% - 4% is provided at the bottom of the cable trench to facilitate drainage. And at the drainage holes 50 in the precast trench wall structure 10 or at the drain pipes, water diversion holes (not shown in the figure) corresponding to the drainage holes 50 are provided on the trench wall of the existing longitudinal drainage ditch 80 in the tunnel, so that the water in the cable trench can be drained to the existing longitudinal drainage ditch 80 in the tunnel.

[0045] As a preferred embodiment, the trench wall part 112 includes a first end face (not shown in the figure) and a second end face (not shown in the figure) arranged oppositely along the longitudinal direction of the tunnel. The first end face includes a first splicing face 1122 and a second splicing face 1123 arranged staggeredly along the longitudinal direction of the tunnel. The second end face includes a third splicing face 1124 and a fourth splicing face 1125 arranged staggeredly along the longitudinal direction of the tunnel. The first splicing face 1122 is flush with the longitudinal end face of the corresponding roadside ditch part 111, the second splicing face 1123 is flush with the longitudinal end face of the corresponding trench bottom part 113, the third splicing face 1124 is flush with the longitudinal end face of the corresponding roadside ditch part 111, and the fourth splicing face 1125 is flush with the longitudinal end face of the corresponding trench bottom part 113.

[0046] As Figure 3 shown, the trench wall part 112 includes a first end face and a second end face arranged oppositely along the longitudinal direction of the tunnel. The first end face includes a first splicing face 1122 and a second splicing face 1123 arranged staggeredly along the longitudinal direction of the tunnel. The second end face includes a third splicing face 1124 and a fourth splicing face 1125 arranged staggeredly along the longitudinal direction of the tunnel. Preferably, the staggering dimension of the first splicing face 1122 and the second splicing face 1123 along the longitudinal direction of the tunnel is set to 10 cm as the splicing interface between two adjacent precast trench wall structures 10, so that two adjacent precast trench wall structures 10 can share the force and improve the anti-collision ability.

[0047] Further, a plurality of horizontal connection holes 1126 for connecting the cable bracket 90 are formed in the groove wall portion 112, and a plurality of cable brackets 90 arranged at intervals in the vertical direction are installed in the cable trench. As Figures 4 - 5 shown, a plurality of horizontal connection holes 1126 for connecting the cable bracket 90 are formed in the groove wall portion 112. As a specific example, each cable bracket 90 is provided with two bolt holes (not shown in the figure) corresponding to the horizontal connection holes 1126 one by one. The cable bracket 90 can be installed on the groove wall of the cable trench by bolts passing through the bolt holes and the horizontal connection holes 1126. The cable bracket 90 can be used for placing cables, avoiding directly placing the cables at the bottom of the trench and reducing the influence of seepage water on the cables. As a preferred example, the aperture of the horizontal connection hole 1126 is set as a Φ12mm hole, and the cable bracket 90 can be made of basalt fiber bracket, which has the advantages of light weight, corrosion resistance, insulation, etc.

[0048] To further assist those skilled in the art to understand the technical solution of the present application, the present application also provides a construction method of a specific example as follows:

[0049] S1. Customize the outer shell plate 110 prefabricated from basalt fiber in the factory and transport it to the construction site;

[0050] S2. After the longitudinal drainage blind ditch in the tunnel is constructed, position and pre-embed the bolt sleeve 310 and nut 320 at the side of the inverted arch concrete 70, and pour C25 concrete to the lower bottom surface of the outer shell plate 110 to fix the bolt sleeve 310;

[0051] S3. Transport the prefabricated materials to the construction site and connect the outer shell plate 110 by bolts according to the position of the reserved bolt sleeve 310;

[0052] S4. Sequentially pour M10 slightly expanded mortar at low pressure through the grouting holes 1121 at the top of the outer shell plate 110, and temporarily press the grouted holes with the strong magnetic cover plate 20 until the mortar in the outer shell plate 110 overflows from the next grouting hole 1121;

[0053] S5. Pre-embed the column 40 with a column spacing of 50 cm, and pour C25 concrete to the upper bottom surface of the outer shell plate 110;

[0054] S6. After the C25 concrete has finally set, plaster the upper bottom surface section of the outer shell plate 110 with cement mortar to form a 2% transverse drainage slope, so that the accumulated water in the cable trench flows into the existing longitudinal drainage blind ditch 80 in the tunnel along the holes of the drainage hole 50;

[0055] S7. Connect the basalt fiber cable bracket 90 by bolts according to the horizontal connection holes 1126 reserved on the side of the outer shell plate 110;

[0056] S8. Construct the pipeline laying in the cable trench;

[0057] S9. Lay the cover plate 20 above the cable trench to complete the construction of the cable trench.

[0058] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A tunnel prefabricated cable trench structure, characterized in that: It comprises a prefabricated trench wall structure and a cover plate; wherein the cover plate comprises a first end and a second end which are arranged opposite to each other in the transverse direction of the tunnel, the first end is connected to the prefabricated trench wall structure, the second end extends outward from the first end in the transverse direction of the tunnel to the side wall of the tunnel arch foot, and the prefabricated trench wall structure is connected to the top of the concrete at the edge of the inverted arch; wherein the prefabricated trench wall structure, the concrete at the edge of the inverted arch and the side wall of the tunnel arch foot together enclose a trench structure with an opening facing upward.

2. The prefabricated cable trench structure for a tunnel according to claim 1, characterized in that: The prefabricated trench wall structure is connected to the top of the inverted arch edge concrete through a connecting assembly, and the connecting assembly includes bolts, bolt sleeves and nuts, wherein the nuts and the bolt sleeves are pre-buried in the inverted arch edge concrete, the outer peripheral wall of the bolt sleeve is provided with an external thread for nut connection, and the inner peripheral wall of the bolt sleeve is provided with an internal thread for bolt connection, and the prefabricated trench wall structure is provided with vertical bolt holes for bolts to pass through, and the vertical bolt holes, the bolt sleeves and the nuts are arranged in a one-to-one correspondence, and the prefabricated trench wall structure is connected to the bolt sleeves by bolts passing through the vertical bolt holes, so as to connect the prefabricated trench wall structure to the top of the inverted arch edge concrete.

3. The tunnel prefabricated cable trench structure according to claim 2 is characterized in that: The prefabricated trench wall structure comprises an outer shell plate and an inner concrete layer. The outer shell plate is provided with grouting holes for concrete injection. Concrete is filled into the outer shell plate through the grouting holes to form the inner concrete layer.

4. The tunnel prefabricated cable trench structure according to claim 3 is characterized in that: The outer shell plate includes a curb ditch portion, a ditch wall portion and a ditch bottom portion which are connected in sequence along the transverse direction of the tunnel. The top surface of the ditch wall portion is higher than the top surface of the curb ditch portion and the top surface of the ditch bottom portion. The top surface of the curb ditch portion is flush with the tunnel pavement. The top surface of the ditch bottom portion is flush with the top surface of the concrete of the invert edge portion and constitutes the ditch bottom of the cable ditch. The grouting holes are opened at the top of the ditch wall portion, and the vertical bolt holes are both opened in the curb ditch portion and the ditch bottom portion.

5. The tunnel prefabricated cable trench structure according to claim 4 is characterized in that: It also includes an in-ditch column assembly arranged on the inner side of the prefabricated trench wall structure, the in-ditch column assembly includes a plurality of columns arranged at intervals along the longitudinal direction of the tunnel, the columns are arranged on the top of the concrete of the invert edge, the second end is overlapped on the top of the column, and the first end is overlapped on the top of the trench wall.

6. The tunnel prefabricated cable trench structure according to claim 4, characterized in that: It also includes a drainage component, which includes a drainage hole reserved in the prefabricated trench wall structure, the water inlet end of the drainage hole is connected to the bottom of the cable trench, the water outlet end of the drainage hole is used to connect to the existing longitudinal drainage ditch of the tunnel, and the bottom of the cable trench has a drainage slope toward the water inlet end to drain the water in the cable trench through the drainage hole to the existing longitudinal drainage ditch of the tunnel.

7. The prefabricated cable trench structure for a tunnel according to claim 6, characterized in that: The drainage slope is set to 2% to 4%.

8. The tunnel prefabricated cable trench structure according to claim 5, characterized in that: The plurality of upright posts are evenly spaced apart along the longitudinal direction of the tunnel, and the spacing distance between two adjacent upright posts along the longitudinal direction of the tunnel is set to be 40 cm to 60 cm.

9. The tunnel prefabricated cable trench structure according to claim 4, characterized in that: The ditch wall portion includes a first end face and a second end face arranged opposite to each other in the longitudinal direction of the tunnel, the first end face includes a first splicing face and a second splicing face arranged staggered in the longitudinal direction of the tunnel, the second end face includes a third splicing face and a fourth splicing face arranged staggered in the longitudinal direction of the tunnel, the first splicing face is flush with the longitudinal end face of the corresponding curb ditch portion, the second splicing face is flush with the longitudinal end face of the corresponding ditch bottom, the third splicing face is flush with the longitudinal end face of the corresponding curb ditch portion, and the fourth splicing face is flush with the longitudinal end face of the corresponding ditch bottom.

10. The tunnel prefabricated cable trench structure according to claim 4, characterized in that: The trench wall is provided with a plurality of transverse connection holes for connecting cable brackets, and a plurality of cable brackets arranged vertically at intervals are installed in the cable trench.

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