Tunnel secondary lining and cable trough inner side wall integrated construction structure

Abstract

The utility model relates to an integrated construction structure of a tunnel secondary lining and an inner side wall of a cable trough, and belongs to the field of constructional engineering. Comprising a first telescopic supporting rod and a second telescopic supporting rod which are arranged between a cable trough template and a trolley body; one end of the first telescopic supporting rod is hinged to the side, away from the pouring face, of the cable trough formwork, and the other end is hinged to the trolley body. One end of the second telescopic supporting rod is hinged to the side, away from the pouring face, of the cable trough formwork, and the other end of the second telescopic supporting rod is connected with the ground and used for fixing the position of the first telescopic supporting rod to increase supporting strength. Wherein the first telescopic supporting rod and the second telescopic supporting rod are located at the same position of the cable trough template, and an included angle is formed between the first telescopic supporting rod and the second telescopic supporting rod. The included angle is formed between the adjacent telescopic supporting rods, so that the positions of the telescopic supporting rods are fixed while the supporting strength is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of construction engineering, in particular to an integrated construction structure of a tunnel secondary lining and an inner wall of a cable trough. Background Art

[0002] In tunnel construction, secondary lining and cable trough fabrication are two critical stages after initial tunnel support. Currently, domestic highway tunnel secondary lining and cable trough inner wall construction are typically performed in stages. The inner wall of the cable trough has traditionally been cast using simple small wooden or steel formwork. This can lead to problems such as uneven groove corners, rough exposed concrete surfaces, dense joints, and numerous misalignments. While the project is relatively small, it severely impacts tunnel construction quality. Furthermore, constructing the inner wall of the cable trough alone requires a significant amount of formwork, other materials, and labor, indirectly increasing construction costs and preventing economic targets from being achieved. Furthermore, the numerous steps involved can also hinder construction progress. Utility Model Content

[0003] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0004] A tunnel secondary lining and cable trough inner wall integrated construction structure includes a secondary lining trolley, the secondary lining trolley includes a trolley body and a secondary lining arch formwork supported on the trolley body and corresponding to the tunnel arch; cable trough formwork is respectively provided at the bottom of both sides of the secondary lining arch formwork; the top of the cable trough formwork is connected to the bottom of the secondary lining arch formwork; the outer peripheral surface of the secondary lining arch formwork is abutted against the outer peripheral surface of the cable trough formwork, surrounding and forming a casting surface for the secondary lining and the inner wall of the cable trough;

[0005] A first telescopic support rod and a second telescopic support rod are arranged between the cable trough template and the trolley body; one end of the first telescopic support rod is hinged to the side of the cable trough template away from the casting surface, and the other end is hinged to the trolley body; one end of the second telescopic support rod is hinged to the side of the cable trough template away from the casting surface, and the other end is connected to the ground, which is used to fix the position of the first telescopic support rod and increase the supporting strength; wherein, the first telescopic support rod and the second telescopic support rod are located at the same position of the cable trough template, and the first telescopic support rod and the second telescopic support rod are arranged at an angle.

[0006] Furthermore, the cable trough template is composed of a top plate and a side plate; one end of the side plate is connected to one end of the top plate, and one end of the top plate away from the side plate is connected to the secondary lining arch template; wherein the top plate and the side plate are arranged vertically;

[0007] The side plate is provided with a first hinge, and the first telescopic support rod and the second telescopic support rod are both hinged to the first hinge.

[0008] Furthermore, the top plate is hinged with a third telescopic support rod near the secondary lining arch template, a second hinge is provided at the bottom of the secondary lining arch template, and the second hinge is connected to the side of the third telescopic support rod away from the cable trough template.

[0009] Furthermore, the second hinged member is also hinged to a fourth telescopic support rod and a fifth telescopic support rod; the other ends of the fourth telescopic support rod and the fifth telescopic support rod are respectively hinged to the trolley body, and the fourth telescopic support rod and the fifth telescopic support rod are arranged at an angle.

[0010] Furthermore, the first hinge is rotatably provided on the side plate, and the second hinge is rotatably provided on the secondary lining arch formwork.

[0011] Furthermore, a plurality of telescopic fixing components are provided between the two sides of the secondary lining arch formwork and the trolley body.

[0012] Furthermore, the telescopic fixing assembly includes a third hinge, a sixth telescopic support rod and a seventh telescopic support rod;

[0013] The third hinge is rotatably arranged on the secondary lining arch template, and one end of the sixth telescopic support rod and the seventh telescopic support rod are hinged to the third hinge, and the other end is hinged to the trolley body respectively; wherein, the sixth telescopic support rod and the seventh telescopic support rod are arranged at an angle.

[0014] Furthermore, the connection between the secondary lining arch formwork and the top plate is inclined, and the connection between the top plate and the secondary lining arch formwork has the same inclination angle as the secondary lining arch formwork; a slide is provided at the connection between the secondary lining arch formwork and the top plate, and wheels are provided at the connection between the top plate and the secondary lining arch formwork, and the wheels are provided on the slide.

[0015] Beneficial effects:

[0016] The utility model discloses an integrated structure designed for the secondary lining of the tunnel and the inner wall of the cable trough. The entire structure has simple construction steps, easy linear control, beautiful appearance, and improved project quality. It reduces construction steps, shortens work efficiency, speeds up construction progress, increases the integrity of the structure, and reduces construction cost investment. At the same time, adjacent telescopic support rods are arranged at an angle to enhance support strength while fixing the position of the telescopic support rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a partial structural diagram of an integrated construction structure of a tunnel secondary lining and inner side wall of a cable trough proposed by the present invention;

[0018] Figure 2 This is a structural schematic diagram of an integrated construction structure of a tunnel secondary lining and inner side wall of a cable trough proposed by the present invention;

[0019] Among them, 1. first hinge; 2. first telescopic support rod; 3. second telescopic support rod; 4. second hinge; 5. third telescopic support rod; 6. fourth telescopic support rod; 7. fifth telescopic support rod; 8. top plate; 9. side plate; 10. telescopic fixing assembly; 11. wheels. DETAILED DESCRIPTION

[0020] Example 1

[0021] refer to Figure 1-Figure 2 A tunnel secondary lining and cable trough inner wall integrated construction structure includes a secondary lining trolley, the secondary lining trolley includes a trolley body and a secondary lining arch formwork supported on the trolley body and corresponding to the tunnel arch; cable trough formwork is respectively provided at the bottom of both sides of the secondary lining arch formwork; the top of the cable trough formwork is connected to the bottom of the secondary lining arch formwork; the outer peripheral surface of the secondary lining arch formwork is butted against the outer peripheral surface of the cable trough formwork and surrounds the outer peripheral surface of the cable trough formwork to form an integrally formed casting surface of the secondary lining and the inner wall of the cable trough;

[0022] A first telescopic support rod 2 and a second telescopic support rod 3 are arranged between the cable trough template and the trolley body; one end of the first telescopic support rod 2 is hinged to the side of the cable trough template away from the casting surface, and the other end is hinged to the trolley body; one end of the second telescopic support rod 3 is hinged to the side of the cable trough template away from the casting surface, and the other end is connected to the ground, which is used to fix the position of the first telescopic support rod 2 and increase the supporting strength; wherein, the first telescopic support rod 2 and the second telescopic support rod 3 are located at the same position of the cable trough template, and the first telescopic support rod 2 and the second telescopic support rod 3 are set at an angle.

[0023] Preferably, the cable trough template is composed of a top plate 8 and a side plate 9; one end of the side plate 9 is connected to one end of the top plate 8; the end of the top plate 8 away from the side plate is connected to the secondary lining arch template; wherein the top plate 8 and the side plate 9 are arranged vertically;

[0024] The side panel 9 is provided with a first hinge 1 , and the first telescopic support rod 2 and the second telescopic support rod 3 are both hinged to the first hinge 1 .

[0025] In this embodiment, the connection between the secondary lining arch formwork and the top plate 8 is inclined, and the connection between the top plate 8 and the secondary lining arch formwork has the same inclination angle as the secondary lining arch formwork; a slide is provided at the connection between the secondary lining arch formwork and the top plate 8, and wheels 11 are provided at the connection between the top plate and the secondary lining arch formwork, and the wheels 11 are provided on the slide.

[0026] In other embodiments, reinforcing ribs are provided at both ends of the top plate 8 and the side plate 9 .

[0027] Preferably, the top plate 8 is hinged with a third telescopic support rod 5 near the secondary lining arch template, a second hinge 4 is provided at the bottom of the secondary lining arch template, and the second hinge 4 is connected to the side of the third telescopic support rod 5 away from the cable trough template.

[0028] In this embodiment, the third telescopic support rod 5 is tilted to fix and support the position of the top plate 8; the third telescopic support rod 5 pushes the top plate 8 to slide along the slideway of the secondary lining arch formwork.

[0029] Preferably, the second hinge 4 is also hinged with a fourth telescopic support rod 6 and a fifth telescopic support rod 7; the other ends of the fourth telescopic support rod 6 and the fifth telescopic support rod 7 are respectively hinged to the trolley body, and the fourth telescopic support rod 6 and the fifth telescopic support rod 7 are arranged at an angle.

[0030] Preferably, the first hinge 1 is rotatably provided on the side plate 9, and the second hinge 4 is rotatably provided on the secondary lining arch formwork.

[0031] Preferably, a plurality of telescopic fixing components 10 are further provided between the two sides of the secondary lining arch formwork and the trolley body.

[0032] Preferably, the telescopic fixing assembly 10 includes a third hinge, a sixth telescopic support rod and a seventh telescopic support rod;

[0033] The third hinge is rotatably arranged on the secondary lining arch template. One end of the sixth telescopic support rod and the seventh telescopic support rod are hinged to the third hinge, and the other end is hinged to the respective trolley bodies; wherein the sixth telescopic support rod and the seventh telescopic support rod are arranged at an angle.

[0034] Working Principle: The Luogu Tunnel on the Zhaotong (Sichuan-Yunnan border) to Xichang Expressway stretches 13,235 meters and contains 52,940 meters of cable trough. Excavation was conducted across eight working faces, all utilizing an integrated construction system with the secondary tunnel lining and cable trough sidewalls. The integrated trolley is constructed from channel steel, I-beams, and various types of Q235 steel plates. The standard dimensions of the tunnel cable trough are 65 cm x 66 cm. The arched outer molds and cable trough formwork are constructed from 12 mm thick Q235 steel plates. To account for tunnel settlement convergence and in accordance with regulatory requirements, the construction radius of the tunnel was increased by 5 cm compared to the design radius. Consequently, the radius of the secondary tunnel lining trolley was increased by 5 cm.

[0035] Carry out trolley assembly and formwork inspection work outside the tunnel, adjust the angle of the cable trough formwork, polish all external formwork, check the running system and the hydraulic telescopic system of the trolley as a whole; lay waterproof board and geotextile and fix them in the second lining section of the tunnel; advance to the designated position of the second lining of the construction tunnel, carry out trolley positioning work, lift the hydraulic telescopic system to put the arched outer formwork in place and wait for pouring. In the specific implementation process, after the trolley is positioned, multiple screws are set at the arched outer formwork and the load-bearing legs to strengthen the support function; use the telescopic support rod and telescopic support assembly to support the arched outer formwork. and the cable trough template, adjust the position and lock it, and seal the bottom of the cable trough template; the surveyor reviews the trolley outline and the cable trough template, and makes timely adjustments if there is an error; lays the embedded water stop, and assembles the plug template (the plug template uses a steel plug combined with geotextile to seal); checks the trolley fixation and template sealing, pours concrete and strengthens the vibration work as required by the specifications; after the concrete strength meets the requirements of the specifications, the formwork is removed, the hydraulic telescopic system is retracted to lower the main frame of the second lining trolley and the overall formwork assembly, the cable trough template is put away, the trolley moves forward, and the formwork is removed.

[0036] The above are merely preferred embodiments of the present invention and do not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A tunnel secondary lining and cable trough inner wall integrated construction structure, comprising a secondary lining trolley, the secondary lining trolley comprising a trolley body and a secondary lining arch formwork supported on the trolley body and corresponding to the tunnel arch; cable trough formwork is respectively provided at the bottom of both sides of the secondary lining arch formwork; the top of the cable trough formwork is connected to the bottom of the secondary lining arch formwork; the outer peripheral surface of the secondary lining arch formwork is butted against the outer peripheral surface of the cable trough formwork to surround and form a casting surface integrally formed between the secondary lining and the inner wall of the cable trough, characterized in that: A first telescopic support rod and a second telescopic support rod are arranged between the cable trough template and the trolley body; one end of the first telescopic support rod is hinged to the side of the cable trough template away from the casting surface, and the other end is hinged to the trolley body; one end of the second telescopic support rod is hinged to the side of the cable trough template away from the casting surface, and the other end is connected to the ground, which is used to fix the position of the first telescopic support rod and increase the supporting strength; wherein, the first telescopic support rod and the second telescopic support rod are located at the same position of the cable trough template, and the first telescopic support rod and the second telescopic support rod are arranged at an angle.

2. The integrated construction structure of the tunnel secondary lining and the inner wall of the cable trough according to claim 1, characterized in that: The cable trough template is composed of a top plate and a side plate; one end of the side plate is connected to one end of the top plate for adjusting the size of the cable trough template; the end of the top plate away from the side plate is slidably connected to the secondary lining arch template; wherein the top plate and the side plate are arranged vertically; The side plate is provided with a first hinge, and the first telescopic support rod and the second telescopic support rod are both hinged to the first hinge.

3. The integrated construction structure of the tunnel secondary lining and the inner wall of the cable trough according to claim 2, characterized in that: The top plate is hinged with a third telescopic support rod near the secondary lining arch template, and a second hinge is provided at the bottom of the secondary lining arch template, and the second hinge is connected to the side of the third telescopic support rod away from the cable trough template.

4. The integrated construction structure of the tunnel secondary lining and the inner wall of the cable trough according to claim 3 is characterized in that: The second hinged member is also hinged with a fourth telescopic support rod and a fifth telescopic support rod; the other ends of the fourth telescopic support rod and the fifth telescopic support rod are respectively hinged to the trolley body, and the fourth telescopic support rod and the fifth telescopic support rod are arranged at an angle.

5. The integrated construction structure of the tunnel secondary lining and the inner wall of the cable trough according to claim 4, characterized in that: The first hinge is rotatably provided on the side plate, and the second hinge is rotatably provided on the secondary lining arch formwork.

6. The integrated construction structure of the tunnel secondary lining and the inner wall of the cable trough according to claim 1, characterized in that: A plurality of telescopic fixing components are further provided between the two sides of the secondary lining arch formwork and the trolley body.

7. The integrated construction structure of the tunnel secondary lining and the inner wall of the cable trough according to claim 6, characterized in that: The telescopic fixing assembly includes a third hinge, a sixth telescopic support rod and a seventh telescopic support rod; The third hinge is rotatably arranged on the secondary lining arch template, and one end of the sixth telescopic support rod and the seventh telescopic support rod are hinged to the third hinge, and the other end is hinged to the trolley body respectively; wherein, the sixth telescopic support rod and the seventh telescopic support rod are arranged at an angle.

8. The integrated construction structure of the tunnel secondary lining and the inner wall of the cable trough according to claim 5, characterized in that: The connection between the secondary lining arch formwork and the top plate is set at an inclination, and the connection between the top plate and the secondary lining arch formwork has the same inclination angle as the secondary lining arch formwork; a slide is provided at the connection between the secondary lining arch formwork and the top plate, and wheels are provided at the connection between the top plate and the secondary lining arch formwork, and the wheels are set on the slide.

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