Movable maintenance operation platform for uprights on arch of reinforced concrete arch bridge

Abstract

The utility model relates to a movable maintenance operation platform for a spandrel column of a reinforced concrete arch bridge, which comprises a lifting platform and a platform lifting system, a through hole is arranged in the middle of the lifting platform, and the lifting platform is movably sleeved on the periphery of the spandrel column through the through hole. The platform lifting system comprises two winches, two winch supports and two lifting frames, the two winch supports are anchored to the tops of the two opposite sides of the on-arch stand column respectively, the two winches are fixed to the two winch supports respectively, and the two lifting frames are located below the two winch supports respectively and fixedly connected with the lifting platform. Traction ropes of the two winches are connected with the tops of the two lifting frames respectively. According to the utility model, the lifting system lifts the platform to move up and down along the spandrel column, so that a constructor can carry out all-directional maintenance operation on the spandrel column on the platform, and the construction safety is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge engineering, relates to bridge maintenance equipment, and specifically relates to a movable maintenance operation platform for arch columns of reinforced concrete arch bridges. Background Art

[0002] Top-supported and mid-supported reinforced concrete arch bridges typically have arch columns installed on the main arch ring to support the main beams. These columns serve as bridge piers. These columns are reinforced concrete structures. As the bridge ages, the concrete may develop cracks, carbonization, and surface corrosion, requiring regular maintenance and repair. The arch columns of long-span reinforced concrete arch bridges are often quite tall, especially those near the side arches, which can reach heights of more than ten meters or even dozens of meters. Reaching the top of these columns is difficult for workers, and climbing or hanging maintenance methods are highly dangerous. Summary of the Invention

[0003] The purpose of the utility model is to solve the above problems and provide a mobile maintenance operation platform for the arch columns of reinforced concrete arch bridges, which is convenient for maintaining the arch columns and ensures the safety of construction operations.

[0004] The technical solution of the utility model is as follows:

[0005] A mobile maintenance work platform for the arch columns of a reinforced concrete arch bridge, characterized in that it includes a lifting platform and a platform lifting system; a through hole is provided in the middle of the lifting platform, and is movably mounted on the periphery of the arch column through the through hole; the platform lifting system includes two winches, two winch brackets and two lifting frames, the two winch brackets are respectively anchored at the top of two opposite sides of the arch column, the two winches are respectively fixed on the two winch brackets, the two lifting frames are respectively located under the two winch brackets and fixedly connected to the lifting platform, and the traction ropes of the two winches are respectively connected to the top of the two lifting frames.

[0006] The utility model adopts a surround-type steel structure platform, which is sleeved on the arch columns. The platform is lifted and moved up and down along the arch columns by a lifting system. Construction workers can perform all-round maintenance work on the arch columns on the platform and ensure construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a side structural view of the utility model;

[0008] Figure 2 This is a front view structural diagram of the present utility model;

[0009] Figure 3 It is a schematic diagram of the plane structure of the utility model;

[0010] Figure 4 It is a schematic diagram of the use state of the utility model. DETAILED DESCRIPTION

[0011] like Figure 1 、 Figure 2 、 Figure 3 As shown, the utility model includes a lifting platform and a platform lifting system; a through hole is provided in the middle of the lifting platform 1, and is movably mounted on the arch column 100 through the through hole; the platform lifting system includes two winches 2, two winch brackets 3 and two lifting frames 4, the two winch brackets 3 are respectively anchored at the top of the two opposite sides of the arch column 100, the two winches 2 are respectively fixed on the two winch brackets 3, the two lifting frames 4 are respectively arranged under the two winch brackets and fixedly connected to the lifting platform, and the traction ropes 21 of the two winches are respectively connected to the top of the two lifting frames 4.

[0012] In the above structure, the winch 2 can pull the lifting platform 1 up and down along the arch column 100 by retracting and releasing the traction rope 21. The construction workers on the platform can maintain various parts of the arch column.

[0013] like Figure 3 As shown, as a specific embodiment of the present invention, the lifting platform 1 is composed of 4 rectangular platform modules, each platform module includes two longitudinal beams 11, and multiple distribution beams 12 are welded between the two longitudinal beams. The 4 platform modules are arranged according to the four sides of the rectangle, and the two ends of each platform module are respectively welded to the ends of two platform modules perpendicular to it or connected by bolts. A rectangular through hole is enclosed in the middle of the 4 platform modules, which is mounted on the arch column 100 through the rectangular through hole in the middle.

[0014] In order to ensure the construction workers to work safely on the platform, a platform guardrail 13 is provided around the lifting platform 1.

[0015] As a specific embodiment of the present utility model, each winch bracket 3 includes two corbels 31, the two corbels 31 are anchored on the top of the side wall of the arch column 100, and at least two load-bearing beams 32 are set on the top of the two corbels 31; the two winches 2 are respectively fixed on the load-bearing beams 32 of the two winch brackets.

[0016] like Figure 2 As shown in the figure, each lifting frame 4 includes two vertically arranged suspension rods 41, a lower crossbeam 42 is welded at the lower ends of the two suspension rods, and an upper crossbeam 43 is welded between the upper ends of the two suspension rods. The lower crossbeam 42 is fixedly arranged at the bottom of the lifting platform 1, and the traction ropes 21 of the two winches 2 are respectively connected to the middle of the upper crossbeams 43 of the two lifting frames.

[0017] During the specific implementation of the present invention, in order to avoid direct contact between the lifting platform and the arch column during the lifting process, which may cause friction damage to the concrete of the column, the through hole in the middle of the lifting platform 1 is set to be larger than the cross-sectional size of the arch column 100. However, due to the gap between the lifting platform and the arch column, the lifting platform may shake in the air and collide with the column, or the platform may tilt due to unbalanced load on the lifting platform. In order to avoid the above problems, during the specific implementation of the present invention, a platform sliding system is also provided. The platform sliding system includes four guide rails 5 and four sliding wheel groups corresponding to the four guide rails respectively. Two of the four guide rails 5 are vertically anchored on both sides of the winch provided on the arch column 100. Each sliding wheel group includes a wheel frame 6 and two pulleys 7. The pulley 7 is rotatably provided on the wheel frame 6. The upper end of the wheel frame 6 is welded to the lifting platform. The pulley 7 of each sliding wheel group is supported on a guide rail 5 and can slide up and down along the guide rail.

[0018] In the above structure, the sliding wheel groups located on both sides of the arch columns play a role in horizontal limiting and vertical guiding the platform, which can not only prevent the platform from shaking or tilting, but also ensure that the platform is relatively smooth when rising and falling.

[0019] As a specific implementation of the sliding wheel group, the wheel frame 6 of each sliding wheel group adopts two wheel frame plates, each wheel frame plate includes two vertical rods 61, two connecting plates 62 are welded between the two vertical rods, and the two wheel frame plates are arranged vertically in parallel. The two ends of the wheel axle of the pulley 7 of each sliding wheel group are respectively passed through the connecting plates 62 of the two wheel frame plates.

[0020] In order to increase the stability of the lifting platform, diagonal braces 8 can be fixedly provided between the outer side of the lifting platform and each wheel frame.

[0021] The installation method of this utility model is as follows:

[0022] like Figure 4 As shown, the main arch ring 200 is provided with an arch column 100. When the arch column 100 is cast, guide rails 5 and corbel anchors are preset on the two opposite side walls of the arch column 100; the lifting platform 1 is welded on the ground, and the two lifting frames and the four sliding wheel groups are welded and fixed to the lifting platform during the processing; after the construction of the arch column is completed, the lifting platform 1 is put on the arch column 100 by a tower crane or a cable crane, and the pulleys of the four sliding wheel groups are respectively clamped on the four guide rails, and the winch bracket 3 and the winch 2 are installed on the top of both sides of the track of the arch column, and the traction rope 21 of the winch is connected to the upper crossbeam of the two lifting frames 4 to complete the installation of the maintenance work platform. The lifting platform 1 can be towed up and down by the winch 2.

[0023] The maintenance platform is used as a regular maintenance device for the arch columns and can be lowered to the bottom of the columns when not in use. Due to the slope of the arch ring top, the lower ends of the wheel frames 6 of the four sliding wheel sets at the bottom of the lifting platform can be supported on the base 101 of the arch columns, acting as outriggers to keep the lifting platform 1 level.

Claims

1. A mobile maintenance platform for arch columns of reinforced concrete arch bridges, characterized by: It includes a lifting platform and a platform lifting system; a through hole is provided in the middle of the lifting platform, and is movably mounted on the outer periphery of the arch column through the through hole; the platform lifting system includes two winches, two winch brackets and two lifting frames, the two winch brackets are respectively anchored at the top of the two opposite sides of the arch column, the two winches are respectively fixed on the two winch brackets, the two lifting frames are respectively located under the two winch brackets and fixedly connected to the lifting platform, and the traction ropes of the two winches are respectively connected to the top of the two lifting frames.

2. The mobile maintenance platform for arch columns of reinforced concrete arch bridges according to claim 1, characterized in that: The lifting platform includes four rectangular platform modules, each platform module includes two longitudinal beams, and multiple distribution beams are welded between the two longitudinal beams. The four platform modules are arranged according to the four sides of the rectangle. The two ends of each platform module are respectively welded or bolted to the ends of two platform modules perpendicular to it. A rectangular through hole is enclosed in the middle of the four platform modules.

3. The mobile maintenance platform for arch columns of reinforced concrete arch bridges according to claim 1 or 2, characterized in that: The lifting platform is provided with platform guardrails around it.

4. The mobile maintenance platform for arch columns of reinforced concrete arch bridges according to claim 1, characterized in that: Each winch bracket includes two brackets, which are anchored on the top of the side walls of the arch columns. At least two load-bearing beams are set on the top of the two brackets; the two winches are respectively fixed on the load-bearing beams of the two winch brackets.

5. The mobile maintenance platform for arch columns of reinforced concrete arch bridges according to claim 1 is characterized in that: Each lifting frame includes two vertically arranged suspension rods, a lower crossbeam welded at the lower ends of the two suspension rods, and an upper crossbeam welded between the upper ends of the two suspension rods. The lower crossbeam is fixedly arranged at the bottom of the lifting platform, and the traction ropes of the two winches are respectively connected to the middle of the upper crossbeams of the two lifting frames.

6. The mobile maintenance platform for arch columns of reinforced concrete arch bridges according to claim 1, characterized in that: It also includes a platform sliding system, which includes 4 guide rails and sliding wheel groups corresponding to the 4 guide rails. Two of the 4 guide rails are vertically anchored on both sides of the winch set on the arch column. Each sliding wheel group includes a wheel frame and 1-2 pulleys. The pulleys are rotatably set on the wheel frame. The upper end of the wheel frame is welded to the lifting platform. The pulley of each sliding wheel group is supported on a guide rail and can slide up and down along the guide rail.

7. The mobile maintenance platform for arch columns of reinforced concrete arch bridges according to claim 6, characterized in that: The wheel frame of each sliding wheel group includes two wheel frame plates, each wheel frame plate includes two vertical rods, two connecting plates are welded between the two vertical rods, and the two wheel frame plates are arranged vertically and parallel. The pulley of each sliding wheel group is located between the two wheel frame plates, and the two ends of the pulley axle are respectively passed through the connecting plates of the two wheel frame plates.

8. The mobile maintenance platform for arch columns of reinforced concrete arch bridges according to claim 6, characterized in that: An oblique support rod is fixedly arranged between the outer side of the lifting platform and each wheel frame.

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