Heightened tunnel cable trench structure

Abstract

The utility model provides a heightened tunnel cable trench structure which comprises an existing cable trench body, a cover plate, a trench wall heightening assembly and a stand column assembly used for supporting the cover plate, the trench wall heightening assembly is connected to the top of the existing cable trench body, the height of the trench wall heightening assembly ranges from 5 cm to 15 cm, and the stand column assembly is installed at the top of the existing cable trench body. The stand column assembly and the trench wall heightening assembly are located on the two sides of the existing cable trench body respectively, the stand column assembly comprises a plurality of stand columns arranged at intervals in the extending direction of a tunnel, the cover plate comprises a first end and a second end which are oppositely arranged in the transverse direction of the tunnel, and the first end is connected with the trench wall heightening assembly; the second end extends from the first end to the tunnel arch foot side wall and is in lap joint with the top of the stand column. According to the method, maintainers can be effectively isolated from running vehicles, so that the risk that the maintainers are collided by the vehicles in the operation process is greatly reduced, construction is easy and convenient, the construction period is greatly shortened, interference to tunnel operation is small, and economical efficiency is good.

Description

Technical Field

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

[0002] Tunnel maintenance road refers to a passage or platform set up to facilitate daily inspection, maintenance and emergency repair of facilities and equipment in the tunnel. Due to the "white to black" transformation of some tunnels, the road surface has been raised, resulting in the height of the tunnel cable trench being lower than the recommended value in the specification. If a car loses control and hits the side wall of the cable trench, it is very easy to cause the vehicle to roll over or hit the tunnel side wall and maintenance personnel.

[0003] At present, there are several common cable trench side wall heightening solutions:

[0004] (1) Directly heightening the existing cable trench sidewalls with concrete. This solution requires installing formwork on both sides of the top of the existing cable trench sidewalls and removing the formwork after the concrete reaches the designed strength. The construction period is long and complicated, and it has a great impact on the operation of the high-speed tunnel.

[0005] (2) Use steel guardrails to directly raise the side walls of the existing cable trench. Steel guardrails are taller than concrete and are relatively expensive. In addition, steel guardrails are generally set at a certain angle and tilted toward the maintenance road, compressing the net width of the maintenance road and partially affecting the emergency maintenance function.

[0006] In view of this, it is necessary to propose a heightened tunnel cable trench structure to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0007] The main purpose of the utility model is to provide a heightened tunnel cable trench structure to solve the technical problems of the existing cable trench side wall heightening scheme in the prior art, such as long and complicated construction period and great interference to tunnel operation.

[0008] To achieve the above-mentioned purpose, the utility model provides a heightened tunnel cable trench structure, comprising an existing cable trench body, a cover plate, a trench wall heightening assembly and a column assembly for supporting the cover plate; wherein:

[0009] The trench wall heightening component is connected to the top of the existing cable trench body, and the height of the trench wall heightening component is set between 5 and 15 cm;

[0010] The column assembly is installed on the top of the existing cable trench body, the column assembly and the trench wall heightening assembly are respectively located on both sides of the existing cable trench body, and the column assembly includes a plurality of columns arranged at intervals along the extension direction of the tunnel;

[0011] The cover plate includes a first end and a second end which are oppositely arranged along the tunnel transverse direction, wherein the first end is connected to the trench wall raising assembly, and the second end extends from the first end toward the tunnel arch foot side wall and overlaps the top of the column.

[0012] Preferably, the trench wall raising assembly includes a prefabricated steel pipe, a concrete structural layer, a top plate connected to the top of the prefabricated steel pipe, and a bottom plate connected to the bottom of the prefabricated steel pipe, wherein the top plate is provided with grouting holes for concrete injection, and the prefabricated steel pipe, the top plate and the bottom plate together form a grouting space for concrete grouting, and concrete is injected into the grouting space through the grouting holes to form the concrete structural layer.

[0013] Preferably, the bottom plate is provided with through holes for the steel bars to pass through, and the existing cable trench body is drilled with rebar embedding holes corresponding one to one to the through holes. The steel bars include a first section and a second section along their own extension direction, the first section is implanted into the rebar embedding hole, and the second section is pre-buried in the concrete structure layer.

[0014] Preferably, there are a plurality of through holes, and the plurality of through holes are evenly spaced apart along the extension direction of the tunnel, and the spacing distance between two adjacent through holes is set between 15 cm and 25 cm.

[0015] Preferably, two adjacent steel bars are cross-arranged in a vertical plane.

[0016] Preferably, the outer peripheral wall of the prefabricated steel pipe is connected with a steel ring plate near the top surface of the existing cable trench body, the steel ring plate is provided with a first bolt hole for bolts to pass through, and the existing cable trench body is provided with second bolt holes arranged one-to-one corresponding to the first bolt holes, the lower ends of the bolts are pre-buried in the existing cable trench body, and the steel ring plate is fixed to the existing cable trench body by screwing the nut.

[0017] Preferably, a lap groove for lap connection of the first end is provided on the top of the trench wall raising assembly on a side close to the tunnel arch foot side wall.

[0018] Preferably, there are multiple grouting holes, and the multiple grouting holes are evenly spaced apart along the extension direction of the tunnel, and the interval between two adjacent grouting holes is set to 90 cm to 110 cm.

[0019] Preferably, a plurality of the trench wall raising assemblies are arranged side by side along the extension direction of the tunnel.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] (1) The heightening scheme of the present application can effectively isolate maintenance personnel from moving vehicles, thereby greatly reducing the risk of maintenance personnel being hit by vehicles during work and significantly improving the safety of maintenance work; it can also effectively reduce the impact of water splashes, dust and other debris splashed by vehicles on maintenance personnel, thereby effectively preventing potential risks caused by environmental factors.

[0022] (2) The construction is simple and does not require the erection of formwork, which not only saves materials for supporting and removing formwork, but also greatly shortens the construction period, thus achieving good economic benefits;

[0023] (3) The construction can be carried out completely within the existing cable trench, with little interference. By vertically raising the side walls of the existing cable trench, the clearance and width of the maintenance road are not compressed;

[0024] (4) The steel tube concrete composite structure has high impact bearing capacity, good ductility and excellent seismic performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the overall structure after the steel bars are implanted in one embodiment of the utility model;

[0028] Figure 3 It is a schematic diagram of the overall structure after the implanted steel bars and the added steel ring plates are connected in one embodiment of the utility model;

[0029] Figure 4 This is an application scenario diagram of the overall structure in one embodiment of the utility model;

[0030] Figure 5 for Figure 4 A is an enlarged schematic diagram;

[0031] Figure 6 It is a schematic structural diagram of a cover plate in an embodiment of the utility model.

[0032] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0033] Description of Figure Numbers:

[0034] 10. Existing cable trench body; 20. Cover plate; 210. First end; 220. Second end; 30. Trench wall heightening assembly; 310. Prefabricated steel pipe; 320. Concrete structure layer; 330. Top plate; 340. Bottom plate; 350. Overlap groove; 40. Column; 50. Rebar; 510. First section; 520. Second section; 60. Steel ring plate; 610. Bolt; 620. Nut; 70. Tunnel arch foot side wall. DETAILED DESCRIPTION

[0035] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as described in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0039] Please see attached Figures 1 to 6 In one embodiment of the utility model, a heightened tunnel cable trench structure is provided, comprising an existing cable trench body 10, a cover plate 20, a trench wall heightening assembly 30 and a column assembly (not shown) for supporting the cover plate 20; wherein, in the heightening scheme, the cover plate 20 can adopt either the original cover plate or a newly made cover plate, such as a cover plate prefabricated part made of basalt fiber, which has the characteristics of high strength and light weight, light overall weight, and the advantage of being easy to transport.

[0040] The trench wall heightening component 30 is connected to the top of the existing cable trench body 10, and the height of the trench wall heightening component 30 is set between 5 and 15 cm; specifically, Figure 1 As shown, the trench wall heightening component 30 is connected to the top surface of the existing cable trench body 10. In order to ensure effective heightening, the height of the heightening component 30 is preferably set between 5 and 15 cm. In other embodiments, those skilled in the art can also set the height value to other values ​​as needed. As a preferred example, the cover plate can be used as follows Figure 5 In the structure shown in the figure, the length direction is the extension direction of the tunnel.

[0041] The column assembly is installed on the top of the existing cable trench body 10, and the column assembly and the trench wall heightening assembly 30 are respectively located on both sides of the existing cable trench body 10. The column assembly includes a plurality of columns 40 arranged at intervals along the extension direction of the tunnel; the cover plate 20 includes a first end 210 and a second end 220 arranged opposite to each other in the transverse direction of the tunnel, the first end 210 is connected to the trench wall heightening assembly 30, and the second end 220 extends from the first end 210 toward the tunnel arch foot side wall 70 and overlaps the top of the column 40.

[0042] like Figure 5 As shown, the column assembly is installed on the top of the existing cable trench body 10, that is, on the side close to the tunnel arch foot side wall 70, and the first end 210 of the cover plate 20 is connected to the trench wall heightening assembly 30, for example, it can be overlapped on the top of the trench wall heightening assembly 30. Furthermore, cement mortar can be filled in the right space of the column assembly to reduce water from entering the cable trench.

[0043] As a preferred embodiment, the trench wall heightening assembly 30 includes a prefabricated steel pipe 310, a concrete structure layer 320, a top plate 330 connected to the top of the prefabricated steel pipe 310, and a bottom plate 340 connected to the bottom of the prefabricated steel pipe 310, wherein the top plate 330 is provided with a grouting hole for concrete injection (not shown in the figure), the prefabricated steel pipe 310, the top plate 330 and the bottom plate 340 are jointly surrounded to form a grouting space for concrete grouting, and concrete is injected into the grouting space through the grouting hole to form the concrete structure layer 320. Figure 1 As shown, concrete is injected into the grouting space through the grouting holes to form the concrete structure layer 320, thereby forming a steel tube concrete composite structure, which has the advantages of high impact bearing capacity, good ductility and excellent seismic performance.

[0044] As a preferred embodiment, the bottom plate 340 is provided with a through hole (not shown) for the steel bar 50 to pass through, and the existing cable trench body 10 is drilled with anchoring holes (not shown) corresponding to the through hole one by one. The steel bar 50 includes a first section 510 and a second section 520 along its own extension direction. The first section 510 is implanted into the anchoring hole, and the second section 520 is pre-buried in the concrete structure layer 320.

[0045] Specifically, as a preferred implementation, this embodiment can be carried out according to the following steps during the actual construction process:

[0046] S11, measure the height difference between the existing cable trench body 10 and the road surface, and customize different types of square prefabricated steel pipes 310 in the factory according to the actual road surface height difference. For example, if the height difference is less than 25cm, a 5x5cm steel pipe can be selected, and if the height difference is less than 20cm, a 10x5cm steel pipe can be selected;

[0047] S12, when the factory customizes the steel pipe, a grouting hole for concrete injection is opened on the top plate 330, and a reinforcement hole is opened on the bottom plate 340;

[0048] S13, roughening the top concrete of the existing cable trench body 10, and then drilling corresponding reinforcing bar holes;

[0049] S14, use φ12@20cm interval arrangement to plant reinforcement on the top of the existing cable trench body 10, and after the planting is completed, carry out pull-out force test, the test value should be greater than 16KN;

[0050] S15, after the pull-out resistance of the embedded reinforcement meets the requirements, epoxy materials are used to promptly repair the trench wall damage caused by drilling;

[0051] S16, apply epoxy mortar 1cm thick on the top of the existing cable trench body 10;

[0052] S17, the steel pipes are transported to the construction site, pasted and waited for solidification; M10 micro-expansion mortar is poured into the grouting holes on the top of the steel pipes at low pressure in turn, and the holes that have been poured are temporarily pressed with strong magnetic covers to prevent the mortar in the pipe from overflowing at the next hole; until the side wall heightening construction of the entire tunnel inspection road is completed.

[0053] As a preferred example, there are multiple through holes, and the multiple through holes are evenly spaced along the tunnel extension direction, and the spacing distance between two adjacent through holes is set between 15cm and 25cm. In other embodiments, the arrangement mode and spacing distance between the through holes can also be set to other forms as needed.

[0054] Furthermore, two adjacent steel bars 50 are arranged crosswise in the vertical plane. Figure 2As shown in or 3, as a preferred example, three steel bars 50 are arranged at intervals along the longitudinal direction of the tunnel, and are cross-arranged in the vertical plane, with each cross forming a certain angle. The advantage of such an arrangement is that the inner and outer structural strength of the trench wall heightening component 30 can be improved, and the impact resistance can be increased.

[0055] As a preferred embodiment, the outer wall of the prefabricated steel pipe 310 is connected to a steel ring plate 60 near the top surface of the existing cable trench body 10. The steel ring plate 60 is provided with a first bolt hole (not shown) for the bolt 610 to pass through. The existing cable trench body 10 is provided with a second bolt hole (not shown) arranged one-to-one with the first bolt hole. The lower end of the bolt 610 is pre-buried in the existing cable trench body 10. The steel ring plate 60 is fixed to the existing cable trench body 10 by screwing the nut 620. Figure 3 As shown, specifically, during construction, the lower section of the bolt 610 can be pre-buried in the second bolt hole of the existing cable trench body 10, and the upper section of the bolt 610 passes through the first bolt hole, and the steel ring plate 60 is fixed to the existing cable trench body 10 by screwing the nut 620. The steel ring plate 60 is provided on the outer peripheral wall of the prefabricated steel pipe 310. Preferably, the steel ring plate 60 can be welded to the prefabricated steel pipe 310 or can be integrally formed. The connection strength between the prefabricated steel pipe 310 and the existing cable trench body 10 can be further enhanced by connecting with the bolt 610, and the anti-impact bearing capacity can be increased.

[0056] Furthermore, a lap groove 350 for lap connection of the first end 210 is provided on the top of the trench wall heightening assembly 30 at a side close to the tunnel arch foot side wall 70. Figure 5 As shown, a lap groove 350 is opened at the top of the trench wall raising component 30 on one side close to the tunnel arch foot side wall 70, and the first end 210 is overlapped in the lap groove 350. Specifically, the lap groove 350 can be obtained by cutting out the prefabricated steel pipe 310 as a whole after pouring concrete, or a trench wall raising component 30 with the lap groove 350 can be specially made.

[0057] As a preferred example, the number of the grouting holes is multiple, and the multiple grouting holes are evenly spaced along the tunnel extension direction, and the spacing between two adjacent grouting holes is set to 90 cm to 110 cm. In other embodiments, the arrangement form and spacing of the multiple grouting holes can also be set according to actual needs.

[0058] Furthermore, a plurality of the trench wall raising assemblies 30 are arranged side by side along the extension direction of the tunnel. The plurality of trench wall raising assemblies 30 arranged side by side can form a guardrail-like structure as a whole, which can effectively separate maintenance personnel from moving vehicles, thereby greatly reducing the risk of maintenance personnel being hit by vehicles during operations, significantly improving the safety of maintenance work, and effectively reducing the impact of water splashes, dust and other debris splashed by vehicles on maintenance personnel, thereby effectively preventing potential risks caused by environmental factors.

[0059] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heightened tunnel cable trench structure, characterized in that: It includes an existing cable trench body, a cover plate, a trench wall heightening component and a column component for supporting the cover plate; wherein, The trench wall heightening component is connected to the top of the existing cable trench body, and the height of the trench wall heightening component is set between 5 and 15 cm; The column assembly is installed on the top of the existing cable trench body, the column assembly and the trench wall heightening assembly are respectively located on both sides of the existing cable trench body, and the column assembly includes a plurality of columns arranged at intervals along the extension direction of the tunnel; The cover plate includes a first end and a second end which are oppositely arranged along the tunnel transverse direction, wherein the first end is connected to the trench wall raising assembly, and the second end extends from the first end toward the tunnel arch foot side wall and overlaps the top of the column.

2. The elevated tunnel cable trench structure according to claim 1 is characterized in that: The trench wall raising assembly includes a prefabricated steel pipe, a concrete structural layer, a top plate connected to the top of the prefabricated steel pipe, and a bottom plate connected to the bottom of the prefabricated steel pipe, wherein the top plate is provided with grouting holes for concrete injection, and the prefabricated steel pipe, the top plate and the bottom plate together form a grouting space for concrete grouting, and concrete is injected into the grouting space through the grouting holes to form the concrete structural layer.

3. The elevated tunnel cable trench structure according to claim 2 is characterized in that: The bottom plate is provided with through holes for steel bars to pass through, and the existing cable trench body is drilled with rebar embedding holes corresponding to the through holes one by one. The steel bars include a first section and a second section along their own extension direction. The first section is implanted into the rebar embedding hole, and the second section is pre-buried in the concrete structure layer.

4. The elevated tunnel cable trench structure according to claim 3 is characterized in that: There are multiple through holes, and the multiple through holes are evenly spaced and arranged along the extension direction of the tunnel, and the interval between two adjacent through holes is set between 15 cm and 25 cm.

5. The elevated tunnel cable trench structure according to claim 3 is characterized in that: Two adjacent steel bars are arranged crosswise in the vertical plane.

6. The elevated tunnel cable trench structure according to claim 3 is characterized in that: The outer peripheral wall of the prefabricated steel pipe is connected with a steel ring plate near the top surface of the existing cable trench body. The steel ring plate is provided with a first bolt hole for bolts to pass through. The existing cable trench body is provided with second bolt holes arranged one-to-one corresponding to the first bolt holes. The lower ends of the bolts are pre-buried in the existing cable trench body, and the steel ring plate is fixed to the existing cable trench body by screwing the nuts.

7. The elevated tunnel cable trench structure according to any one of claims 1 to 6, characterized in that: The top of the trench wall heightening assembly is provided with a lap groove for lap connection of the first end on one side close to the tunnel arch foot side wall.

8. The elevated tunnel cable trench structure according to claim 2 is characterized in that: There are multiple grouting holes, which are evenly spaced apart along the extension direction of the tunnel, and the spacing between two adjacent grouting holes is set to 90 cm to 110 cm.

9. The elevated tunnel cable trench structure according to claim 1, characterized in that: A plurality of trench wall heightening assemblies are arranged side by side along the extension direction of the tunnel.

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