Synchronous mold moving structure for double-box-girder bridge

Abstract

The utility model relates to a double box girder bridge synchronous mould moving structure which comprises a guide rail laid on a bridge pier, a diamond frame is installed on the guide rail, the lower end of the diamond frame is connected with a rail wheel and a sliding pad, the rail wheel and the sliding pad are both movably arranged on the guide rail, one end of the guide rail is connected with one end of a guide rod, and the other end of the guide rod is connected with a sliding block. The other end of the guide rod penetrates through the sliding pad and is sleeved with a hydraulic cylinder A. A sliding base is movably arranged on the guide rod and connected with the hydraulic cylinder A. During construction, only two force-bearing arm frame bodies are needed, so that the use amount is saved by half; the double-box-girder parallel construction can ensure the synchronous stress of the structure, has the characteristic of replicative integrated construction, is safe in construction and remarkable in economic benefit, and can achieve the purposes of material saving, short construction period and high labor efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a synchronous shifting formwork structure for a double-box girder bridge. Background Art

[0002] With the development of China's bridge industry, long-span bridges have entered a new stage of development. People require that bridges should not only have a large span capacity, but also be low-cost. As a suspended pouring construction equipment for long-span bridges, how to make the construction safe, convenient, fast and economical is an important consideration in the design of modern hanging baskets.

[0003] The patent number is CN202321900129.9, and the application date is 2023-07-19. It discloses a cast-in-place box girder construction support, including a bearing frame and a box girder mold body placed inside the bearing frame. A supporting mechanism for supporting the box girder mold body is arranged inside the bearing frame, and the supporting mechanism includes a side support assembly and a bottom support assembly.

[0004] The above patent, through the setting of the support mechanism, enables the movable plate to extend or contract according to the actual volume of the box beam mold body, so that the side support plate can adapt to the box beam mold bodies of different widths. At the same time, through the rotatable setting between the side support plate and the movable plate, the side support plate can adapt to the slope of the side of the box beam mold body of different specifications, so that the box beam mold bodies of different specifications can get corresponding support, so that the bracket can support the box beam mold bodies of more specifications, and improve the applicability of the device. However, according to the characteristics of the hanging basket structure, two sets of hanging baskets need to be installed for staggered construction. Usually, four load-bearing arm frames are required for the staggered construction of two box beams, resulting in large consumption of construction materials, long construction period, high labor input and low efficiency, which has always troubled the construction unit to install two sets of hanging baskets for staggered construction. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a synchronous formwork structure for a double-box girder bridge, which only requires two load-bearing arm frames during construction, saving half of the usage; the parallel construction of the double-box girders can ensure that the structure is subjected to synchronous force, greatly reducing the construction workload and construction difficulty.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A synchronous formwork structure for a double-box girder bridge comprises a guide rail laid on a bridge pier, a diamond frame is installed on the guide rail, a track wheel and a sliding pad are connected to the lower end of the diamond frame, the track wheel and the sliding pad are movably arranged on the guide rail, one end of the guide rail is connected to one end of a guide rod, the other end of the guide rod passes through the sliding pad and is sleeved with a hydraulic cylinder A, a slide seat is movably arranged on the guide rod, and the slide seat is connected to the hydraulic cylinder A.

[0008] A sleeper is arranged at the lower end of the guide rail, and a plurality of sleepers are evenly distributed, and the guide rail is arranged in two rows.

[0009] The track wheel is provided with a lock buckle, and the lock buckle is fixed on the guide rail through a screw rod.

[0010] An upper beam is connected to one side of the top of the diamond frame, and a plurality of hydraulic cylinders B are evenly distributed on the upper beam. The upper end of a steel rope is connected to the hydraulic cylinder B, and the lower end of the steel rope is connected to one end of a lower beam, and the other end of the lower beam is connected to the bridge pier.

[0011] One end of a lifting rope is also connected to the diamond frame, and the other end of the lifting rope is connected to an inner beam and an outer beam. An inner membrane is placed on the inner beam, an outer mold is placed on the outer beam, and a double box beam is placed on the lower beam. The inner membrane is arranged in the inner cavity of the double box beam, and the outer mold is arranged on the outer side of the double box beam.

[0012] The bottom end of the steel rope is connected with a connecting rod, and the connecting rod connects the lower beams in series. The lower beams are hinged to the bridge pier.

[0013] The beneficial effects of the utility model are:

[0014] 1. Only two load-bearing arm frames are needed during construction, saving half of the usage. The parallel construction of double box girders can ensure the synchronization of structural force, and has the characteristics of replicable integrated construction, safe construction, and significant economic benefits. It can save materials, shorten construction period, and increase labor efficiency. It does not require additional scaffolding, which greatly reduces the investment in scaffolding and wooden formwork. The application of formwork transfer technology in the construction technology of hollow piers greatly simplifies the construction process of hollow piers. Compared with the previous need to build complicated scaffolding on the inner and outer sides of the hollow piers, it greatly reduces the construction workload and construction difficulty.

[0015] 2. The diamond frame is pushed to move by hydraulic cylinder A, which reduces the physical labor of the operator; at the same time, the distance of hydraulic cylinder A is controllable, and the moving distance of the main truss can be accurately controlled by hydraulic cylinder A. There is no need for manual distance measurement every time it moves, which shortens the construction period, reduces labor input, and is highly efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 for Figure 1 Cross-section of the middle AA;

[0018] Figure 3 for Figure 1 Right view of;

[0019] As shown in the figure: 1-bridge pier; 2-guide rail; 3-diamond frame; 4-track wheel; 5-slide pad; 6-guide rod; 7-hydraulic cylinder A; 8-slide seat; 9-lock; 10-sleeper; 11-upper beam; 12-hydraulic cylinder B; 13-steel rope; 14-lower beam; 15-lifting rope; 16-inner beam; 17-outer beam; 18-inner mold; 19-outer mold; 20-double box beam; 21-connecting rod. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figures 1 to 3 As shown, a synchronous mold shifting structure for a double box girder bridge includes a guide rail 2 laid on a pier 1, a diamond frame 3 is installed on the guide rail 2, the lower end of the diamond frame 3 is connected to a track wheel 4 and a slide pad 5, the track wheel 4 and the slide pad 5 are both movably arranged on the guide rail 2, one end of the guide rail 2 is connected to one end of a guide rod 6, the other end of the guide rod 6 passes through the slide pad 5 and is sleeved with a hydraulic cylinder A7, a slide seat 8 is movably arranged on the guide rod 6, and the slide seat 8 is connected to the hydraulic cylinder A7.

[0022] A sleeper 10 is disposed at the lower end of the guide rail 2 , and a plurality of sleepers 10 are evenly distributed, and the guide rail 2 is in two rows.

[0023] The track wheel 4 is provided with a lock buckle 9 , and the lock buckle 9 is fixed on the guide rail 2 via a screw.

[0024] An upper beam 11 is connected to one side of the top of the diamond frame 3, and a plurality of hydraulic cylinders B12 are evenly distributed on the upper beam 11. The upper end of a steel rope 13 is connected to the hydraulic cylinder B12, and the lower end of the steel rope 13 is connected to one end of a lower beam 14, and the other end of the lower beam 14 is connected to the pier 1.

[0025] One end of a lifting rope 15 is also connected to the diamond frame 3, and the other end of the lifting rope 15 is connected to an inner beam 16 and an outer beam 17. An inner membrane 18 is placed on the inner beam 16, and an outer mold 19 is placed on the outer beam 17. A double box beam 20 is placed on the lower beam 14, and the inner membrane 18 is arranged in the inner cavity of the double box beam 20, and the outer mold 19 is arranged on the outer side of the double box beam 20.

[0026] The bottom end of the steel rope 13 is connected with a connecting rod 21 , and the connecting rod 21 connects the lower beams 14 in series. The lower beams 14 are hinged to the pier 1 .

[0027] Two rows of sleepers 10 are installed on the upper surface of the pier 1 , with each row comprising a plurality of sleepers 10 , and guide rails 2 are laid on the sleepers 10 .

[0028] A track wheel 4 and a slide pad 5 are mounted on the lower end of the diamond frame 3. The track wheel 4 is mounted on one end of the diamond frame 3, and the slide pad 5 is mounted on the other end.

[0029] Use a tower crane to hang the diamond frame 3 on the guide rail 2, and the lock buckle 9 fixes the track wheel 4 on the guide rail 2;

[0030] One end of a guide rod 6 is fixed to the outer end of the guide rail 2, and the other end of the guide rod 6 passes through the sliding pad 5. A hydraulic cylinder A7 is sleeved on the guide rod 6, and a sliding seat 8 is slidably arranged on the guide rod 6. The hydraulic cylinder A7 is arranged at the inner end of the guide rod 6, and the hydraulic cylinder A7 is arranged between the sliding seat 8 and the sliding pad 5.

[0031] An upper beam 11 is connected to one side of the top of the diamond frame 3, and fixed ends of multiple hydraulic cylinders B12 are installed on the upper beam 11. The upper end of the steel rope 13 is connected to the telescopic end of the hydraulic cylinder B12, and the lower end of the steel rope 13 is connected to the front connecting rod 21. One end of multiple lower beams 14 is hinged on the connecting rod 21, and the other end of the lower beam 14 is hinged to the pier 1. The double box beam 20 is placed on the lower beam 14. The angle of the lower beam 14 can be adjusted by the telescopic movement of the hydraulic cylinder B12, thereby adjusting the angular position of the double box beam 20.

[0032] An inner beam 16 and an outer beam 17 are connected to the upper beam 11 via a suspension rope 15 . An inner mold 18 is placed on the inner beam 16 , and an outer mold 19 is placed on the outer beam 17 .

[0033] After the reinforcement is tied and the embedded parts are installed in the inner mold 18 and the outer mold 19, concrete is poured, wherein the pouring space in the inner mold 18 and the outer mold 19 is the same as the cross section of the bridge;

[0034] After the pouring is completed, the double box beam 20, the inner mold 18 and the outer mold 19 are removed, the lock buckle 9 is loosened and taken out, the hydraulic cylinder A7 is extended to push the sliding pad 5, the track wheel 4 rolls along the track 6, and the sliding pad 5 drives the diamond frame 3 to move outward. After moving a certain distance, the sliding seat 8 on the hydraulic cylinder A7 is released, and the hydraulic cylinder A7 is retracted to drive the sliding seat 8 to slide in the direction of the movement of the diamond frame 3. After the hydraulic cylinder A7 is retracted, the sliding seat 8 is fixed on the guide rod 6, and the hydraulic cylinder A7 is started to extend and push the diamond frame 3 to move, so that the diamond frame 3 is moved to the construction position step by step and then stops;

[0035] The lock buckle 9 fixes the track wheel 4 on the guide rail 2, and the lock buckle 9 fixes the track wheel 4, fixes the diamond frame 3 on the guide rail 2 to prevent the diamond frame 3 from tilting, places the double box beam 20, the inner mold 18 and the outer mold 19, and then performs steel bar binding and embedded parts installation and pouring concrete;

[0036] Repeat the above steps until the bridge construction is completed.

[0037] Only two load-bearing arm frames are required during construction, saving half of the usage; the 20-degree parallel construction of the double box girders can ensure that the structure is subjected to synchronous force, and has the characteristics of replicable integrated construction, safe construction, and significant economic benefits. It can save materials, shorten the construction period, and increase labor efficiency. There is no need to set up additional scaffolding, which greatly reduces the investment in scaffolding and wooden formwork. The application of formwork transfer technology in the construction technology of hollow piers has greatly simplified the construction process of hollow piers. Compared with the previous need to build complicated scaffolding on the inner and outer sides of the hollow piers, the construction workload and construction difficulty have been greatly reduced.

[0038] The diamond frame is pushed to move by hydraulic cylinder A7, which reduces the physical labor of operators; at the same time, the distance of hydraulic cylinder A7 is controllable, and the moving distance of the main truss can be accurately controlled by hydraulic cylinder A7, without the need for manual distance measurement every time it moves, which shortens the construction period, reduces labor input and improves efficiency.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A synchronous formwork structure for a double box girder bridge, comprising a guide rail (2) laid on a bridge pier (1), characterized in that: A diamond frame (3) is installed on the guide rail (2), the lower end of the diamond frame (3) is connected to a track wheel (4) and a sliding pad (5), the track wheel (4) and the sliding pad (5) are both movably arranged on the guide rail (2), one end of the guide rail (2) is connected to one end of a guide rod (6), the other end of the guide rod (6) passes through the sliding pad (5) and is sleeved with a hydraulic cylinder A (7), the guide rod (6) is movably provided with a slide seat (8), and the slide seat (8) is connected to the hydraulic cylinder A (7).

2. The synchronous formwork structure for a double box girder bridge according to claim 1, characterized in that: A sleeper (10) is arranged at the lower end of the guide rail (2), a plurality of sleepers (10) are evenly distributed, and the guide rail (2) is arranged in two rows.

3. The synchronous shifting formwork structure for a double box girder bridge according to claim 1, characterized in that: The track wheel (4) is provided with a lock buckle (9), and the lock buckle (9) is fixed to the guide rail (2) via a screw rod.

4. The synchronous shifting formwork structure for a double box girder bridge according to claim 1, characterized in that: An upper beam (11) is connected to one side of the top of the diamond frame (3), a plurality of hydraulic cylinders B (12) are evenly distributed on the upper beam (11), the upper end of a steel rope (13) is connected to the hydraulic cylinder B (12), the lower end of the steel rope (13) is connected to one end of a lower beam (14), and the other end of the lower beam (14) is connected to the bridge pier (1).

5. The synchronous formwork structure for a double box girder bridge according to claim 4, characterized in that: The diamond frame (3) is also connected to one end of a suspension rope (15), and the other end of the suspension rope (15) is connected to an inner beam (16) and an outer beam (17), an inner membrane (18) is placed on the inner beam (16), an outer mold (19) is placed on the outer beam (17), and a double box beam (20) is placed on the lower beam (14), the inner membrane (18) is arranged in the inner cavity of the double box beam (20), and the outer mold (19) is arranged on the outer side of the double box beam (20).

6. The synchronous formwork structure for a double box girder bridge according to claim 4, characterized in that: The bottom end of the steel rope (13) is connected to a connecting rod (21), and the connecting rod (21) connects the lower beams (14) in series. The lower beams (14) are hingedly connected to the pier (1).

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