Tunnel integral prefabricated cable trench

Abstract

The utility model discloses an integral prefabricated cable trench for a tunnel, and relates to the technical field of tunnel cable trenches. The problem that in the prior art, on-site construction efficiency of a tunnel cable trench is low is solved. Comprising an embedded steel bar, a welding embedded part, a steel corbel, a door-shaped support and a cable trench, the embedded steel bar is fixedly connected with the steel corbel, a cable installation frame is arranged on the inner side of the door-shaped support, the two side ends of the door-shaped support are fixedly connected with the steel corbel and the welding embedded part respectively, and the cable trench comprises a prefabricated inner side plate, a prefabricated outer side plate and a prefabricated cover plate; the inner side plate and the outer side plate are oppositely and fixedly arranged on the two sides of the cover plate to form a cable trench of a U-shaped groove, and the cable trench covers the outer side of the door-shaped support. The tunnel integral prefabricated cable trench is used for tunnel cable trench construction, the cable trench is formed by integrally prefabricating the inner side plate, the outer side plate and the cover plate, hoisting construction is facilitated, and the field construction efficiency is improved; and the door-shaped bracket is separated from the cable trench, so that mutual interference between cable installation and cable trench construction is reduced, and the construction efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel cable trenches, in particular to an integral precast tunnel cable trench. Background Art

[0002] At present, the construction method of tunnel cable trenches is mainly "cast-in-place inner and outer side plates of the cable trench combined with precast installation of cable trench covers". The on-site casting of the inner and outer side plates requires multiple construction processes such as steel bar binding, formwork erection, concrete pouring, and curing, resulting in low construction efficiency. Moreover, the cast-in-place inner and outer side plates of the cable trench may lead to inaccurate construction precision of the cable trench dimensions, such as inconsistent widths of the cable trench along the longitudinal direction of the tunnel and uneven undulations of the top surface of the cable trench. In addition, currently, cable brackets often adopt the scheme of being fixed on the inner and outer side walls of the cable trench, and installation can only be carried out after the concrete of the inner and outer side walls reaches the design strength, further reducing the on-site construction efficiency. Especially during the repair of tunnel damage, it is a time-consuming bottleneck point, causing long-term traffic jams in the tunnel. Content of the Utility Model

[0003] In order to solve the above problems, the utility model aims to provide an integral precast tunnel cable trench to improve the on-site construction efficiency of the cable trench.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The integral precast tunnel cable trench disclosed by the utility model includes rebar planting, welded embedded parts, steel corbels, portal brackets, and a cable trench. The rebar planting is fixedly connected to the steel corbel. A cable installation rack is arranged inside the portal bracket. The two ends of the portal bracket are respectively fixedly connected to the steel corbel and the welded embedded part. The cable trench includes precast inner side plates, outer side plates, and a cover plate. The inner side plates and the outer side plates are relatively fixedly arranged on both sides of the cover plate to form the U-shaped groove of the cable trench. The cable trench covers the outside of the portal bracket.

[0006] Further, lifting rings are arranged on the top of the cover plate.

[0007] Further, the two lifting rings are respectively arranged at both ends of the top of the cover plate.

[0008] Further, the cable trench is composed of multiple fixed cover plate cable trenches and movable cover plate cable trenches that are butt-jointed at intervals. The cover plate of the movable cover plate cable trench section is composed of multiple sub-cover plates.

[0009] Further, the inner side plates, the outer side plates, and the cover plate are structural members precast with high-strength concrete.

[0010] Furthermore, the portal bracket is composed of two oppositely arranged columns and a cross beam connecting the two columns, and the cross beam is detachably connected to the columns.

[0011] Furthermore, the cross beam is bolted to the columns.

[0012] Furthermore, the cable mounting bracket is arranged inside the column.

[0013] Furthermore, a plurality of the cable mounting brackets are vertically and uniformly arranged inside the column.

[0014] Furthermore, galvanized layers are provided on the surfaces of the planted bars, the welded embedded parts, the steel corbels, the portal brackets, and the cable mounting brackets.

[0015] The beneficial effects of the present utility model are as follows: The integral precast cable trench of the tunnel in this application is used for the construction of the tunnel cable trench. The cable trench is integrally precast with the inner side plate, the outer side plate, and the cover plate. Compared with the existing on-site casting, the process is reduced, and the construction is directly carried out by hoisting, which improves the on-site construction efficiency of the tunnel cable trench, shortens the tunnel blockage time, and ensures the tunnel can be opened to traffic as soon as possible; the portal bracket is separated from the cable trench, and the cable mounting bracket is separated from the cable trench. The cable installation and the cable trench construction can be carried out separately. For example, the cable installation can be carried out during the precasting of the cable trench, while in the existing technology, the cable mounting bracket is fixed on the cable trench, and the cable installation needs to be carried out after the cable trench is installed. Thus, the mutual interference between the cable installation and the cable trench construction is reduced, the construction efficiency of the tunnel cable trench is further improved, the tunnel blockage time is further shortened, and the tunnel can be opened to traffic as soon as possible, which is especially suitable for the repair of tunnel damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 these drawings.

[0017] Figure 1 It is a structural schematic diagram of the installation of an integral precast cable trench and a precast inverted arch of a tunnel provided by an embodiment of the present utility model;

[0018] Figure 2 It is a structural schematic diagram of the installation of a movable cover plate cable trench section and a precast inverted arch of an integral precast cable trench of a tunnel provided by an embodiment of the present utility model;

[0019] Figure 3 It is a structural schematic diagram of the installation of a fixed cover plate cable trench section and a movable cover plate cable trench section of an integral precast cable trench of a tunnel provided by an embodiment of the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the integral precast cable trench in a tunnel provided by an embodiment of the present utility model and the installation of the existing secondary lining structure and precast inverted arch.

[0021] Reference numerals: cable trench 1, outer side plate 101, cover plate 102, inner side plate 103, lifting ring 2, precast inverted arch 3, welded embedded part 4, portal bracket 5, column 501, cable installation rack 502, cross beam 503, steel corbel 6, planted bar 7, existing secondary lining structure 8, fixed cover plate cable trench section 9, movable cover plate cable trench section 10, split cover plate 1001. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other implementation manners 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 scope protected by the present utility model.

[0023] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, this embodiment provides an integral precast cable trench for a tunnel, including planted bar 7, welded embedded part 4, steel corbel 6, portal bracket 5 and cable trench 1. The planted bar 7 is fixedly connected to the steel corbel 6. A cable installation rack 502 is arranged inside the portal bracket 5. The lower ends on both sides of the portal bracket 5 are respectively fixedly connected to the steel corbel 6 and the welded embedded part 4. The cable trench 1 includes precast inner side plate 103, outer side plate 101 and cover plate 102. The inner side plate 103 and the outer side plate 101 are relatively fixedly arranged on both sides of the cover plate 102 to form the U-shaped groove cable trench 1. The cable trench 1 covers the outside of the portal bracket 5. The cable trench 1 is composed of multiple sections of fixed cover plate cable trench sections 9 butt-jointed, or composed of multiple sections of movable cover plate cable trench sections 10 butt-jointed, or composed of multiple sections of fixed cover plate cable trench sections 9 and multiple sections of movable cover plate cable trench sections 10 butt-jointed at intervals.

[0025] The integral precast cable trench based on the above structure is used for the construction of the tunnel cable trench. Select a cable trench precast site near the tunnel entrance, design the cable trench 1 according to the installation space distance between the existing secondary lining structure 8 and the precast inverted arch 3, precast the cable trench 1, and at the same time implant steel bars 7 in the existing secondary lining structure 8. Weld a steel corbel 6 under the part of the implanted steel bar 7 that extends out of the existing secondary lining structure 8. Weld the short side of the portal frame 5 to the steel corbel 6, and weld the long side of the portal frame 5 to the welding embedded part 4 of the precast inverted arch 3. Install the cables on the cable installation rack 502, hoist the integrally precast cable trench 1 outside the portal frame 5. Align the outer plate 101 with the short side of the portal frame 5, and align the inner plate 103 with the long side of the portal frame 5. Connect the lower end of the outer plate 101 to the steel corbel 6, and connect the inner plate 103 to the precast inverted arch 3. Pour in-situ concrete to fill the gap between the precast inverted arch and the existing secondary lining structure to form the bottom surface of the cable trench. Fill the gaps between the precast inverted arch 3, the existing secondary lining structure 8 and the cable trench 1 with mortar, and construct and lay the road surface structure layer to complete the construction of the tunnel cable trench. The cable trench 1 is integrally precast with the inner plate 103, the outer plate 101 and the cover plate 102, which reduces the construction procedures compared with the existing on-site casting. It can be directly hoisted for construction, improving the on-site construction efficiency of the tunnel cable trench, shortening the tunnel congestion time, and ensuring the tunnel can be opened to traffic as soon as possible. The portal frame 5 and the cable trench 1 are separated, and the cable installation rack 502 and the cable trench 1 are separated. Cable installation and cable trench 1 construction can be carried out separately. For example, cable installation can be carried out during the precasting of the cable trench 1, while in the existing situation, the cable installation rack is fixed on the cable trench, and cable installation needs to be carried out after the cable trench 1 is installed. This reduces the mutual interference between cable installation and cable trench 1 construction, further improving the construction efficiency of the tunnel cable trench, further shortening the tunnel congestion time, and ensuring the tunnel can be opened to traffic as soon as possible, especially suitable for tunnel damage repair. Among them, the portal frame 5 cooperates with the cable trench 1, and the portal frame 5 covers the cable trench 1.

[0026] As an implementable manner, as Figure 1 、 Figure 3 shown, a lifting ring 2 is arranged on the top of the cover plate 102.

[0027] The arrangement of the lifting ring 2 facilitates the integral hoisting of the cable trench 1. The number of the lifting rings 2 is one or two.

[0028] Preferably, the two lifting rings 2 are respectively arranged at both ends of the top of the cover plate 102.

[0029] Lifting rings 2 are arranged at both ends of the top of the cover plate 102 to balance the hoisting of the cable trench 1.

[0030] As an implementable manner, as Figure 3As shown, the cable trench 1 is composed of multiple fixed cover plate cable trench sections 9 and multiple movable cover plate cable trench sections 10 that are butt - jointed at intervals. The cover plate of the movable cover plate cable trench section 10 is composed of multiple sub - cover plates 1001.

[0031] The fixed cover plate cable trench sections 9 and the movable cover plate cable trench sections 10 are butt - jointed at intervals in turn to form the cable trench 1. The butt - joint is in the form of abutment or contact. The setting of the movable cover plate cable trench section 10 is to facilitate the opening of the sub - cover plates 1001 for inspection and replacement of the faulty section during later cable maintenance. At the same time, the combination of the fixed cover plate cable trench section 9 and the movable cover plate cable trench section 10 reduces the installation of the movable cover plate cable trench section 10 and improves the construction efficiency. The lifting rings 2 are arranged on the fixed cover plate cable trench sections 9. The cover plate of the movable cover plate cable trench section 10 is composed of multiple sub - cover plates 1001, such as two or three. The sub - cover plates 1001 are lighter than the whole plate, which is convenient for disassembly, installation, handling and placement.

[0032] Preferably, the inner side plate 103, the outer side plate 101 and the cover plate 102 are structural members precast with high - strength concrete.

[0033] The inner side plate 103, the outer side plate 101 and the cover plate 102 precast with high - strength concrete have the characteristics of thin thickness, light weight and high strength, which are convenient for handling and installation.

[0034] As an implementable way, as Figure 1 shown, the portal bracket 5 is composed of two relatively arranged columns 501 and a cross - beam 503 connecting the two columns 501. The cross - beam 503 is detachably connected to the column 501.

[0035] The cross - beam 503 and the column 501 are connected in a detachable manner, which is convenient for cable installation. For example, when laying cables, the cross - beam 503 can be disassembled, and the two columns 501 form an opening. Cables can be laid through the opening, and the cross - beam 503 is reinstalled after the cable laying is completed, which is very convenient. Among them, the cross - beam 503 and the column 501 are connected in a detachable manner such as by bolts or mortise - and - tenon joints.

[0036] Preferably, the cross - beam 503 is bolt - connected to the column 501.

[0037] The cross - beam 503 and the column 501 are bolt - connected, and the connection is more convenient and reliable.

[0038] As an implementable way, as Figure 1 shown, the cable mounting rack 502 is arranged inside the column 501.

[0039] The cable mounting racks 502 are arranged on the inner side walls of the two columns 501. The cross - beam 503 can be removed to directly lay cables, which is very convenient.

[0040] As an implementable way, as Figure 1As shown, a plurality of the cable mounting brackets 502 are vertically and uniformly arranged inside the column 501.

[0041] A plurality of cable mounting brackets 502 are vertically arranged inside the column 501 along the length direction of the column 501, facilitating the laying of multiple cables. The number of the cable mounting brackets 502 is, for example, two or three or four or more integers, and is specifically set according to the cable installation requirements.

[0042] Preferably, the surfaces of the planted bars 7, the welded embedded parts 4, the steel corbels 6, the portal frames 5, and the cable mounting brackets 502 are provided with galvanized layers.

[0043] The provision of the galvanized layers improves the corrosion resistance, hardness, and strength of the planted bars 7, the welded embedded parts 4, the steel corbels 6, the portal frames 5, and the cable mounting brackets 502, thereby extending the service life of the planted bars 7, the welded embedded parts 4, the steel corbels 6, the portal frames 5, and the cable mounting brackets 502. Further, the surface of the lifting ring 2 is provided with a galvanized layer.

[0044] As described above, the above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A tunnel integral prefabricated cable trench, characterized in that: The invention comprises a reinforcing bar (7), a welded embedded part (4), a steel corbel (6), a gate-shaped bracket (5) and a cable trench (1); the reinforcing bar (7) is fixedly connected to the steel corbel (6); a cable installation frame (502) is arranged on the inner side of the gate-shaped bracket (5); the two side ends of the gate-shaped bracket (5) are respectively fixedly connected to the steel corbel (6) and the welded embedded part (4); the cable trench (1) comprises a prefabricated inner plate (103), an outer plate (101) and a cover plate (102); the inner plate (103) and the outer plate (101) are relatively fixedly arranged on both sides of the cover plate (102) to form the cable trench (1) of a U-shaped groove; the cable trench (1) covers the outer side of the gate-shaped bracket (5).

2. The tunnel integral prefabricated cable trench according to claim 1 is characterized in that: A hanging ring (2) is provided on the top of the cover plate (102).

3. The tunnel integral prefabricated cable trench according to claim 2 is characterized in that: The two lifting rings (2) are respectively arranged at two ends of the top of the cover plate (102).

4. The tunnel integral prefabricated cable trench according to claim 1 is characterized in that: The cable trench (1) is composed of a plurality of fixed cover cable trench sections (9) and movable cover cable trench sections (10) connected at intervals, and the cover plates of the movable cover cable trench sections (10) are composed of a plurality of sub-cover plates (1001).

5. The tunnel integral prefabricated cable trench according to claim 1 is characterized in that: The inner plate (103), the outer plate (101) and the cover plate (102) are prefabricated structural parts made of high-strength concrete.

6. The tunnel integral prefabricated cable trench according to claim 1 is characterized in that: The door-shaped bracket (5) is composed of two oppositely arranged upright posts (501) and a crossbeam (503) connecting the two upright posts (501), and the crossbeam (503) is detachably connected to the upright posts (501).

7. The tunnel integral prefabricated cable trench according to claim 6 is characterized in that: The cross beam (503) is bolted to the column (501).

8. The tunnel integral prefabricated cable trench according to claim 7 is characterized in that: The cable installation frame (502) is arranged on the inner side of the column (501).

9. The tunnel integral prefabricated cable trench according to claim 8 is characterized in that: A plurality of cable installation racks (502) are evenly arranged vertically on the inner side of the column (501).

10. The tunnel integral prefabricated cable trench according to claim 1, characterized in that: The surfaces of the embedded reinforcement (7), the welded embedded parts (4), the steel bracket (6), the door-shaped bracket (5), and the cable installation frame (502) are provided with a galvanized layer.

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