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

Abstract

The invention relates to a movable maintenance operation platform for an arch column of a reinforced concrete arch bridge, which comprises a lifting platform and a platform lifting system, a through hole is formed in the middle of the lifting platform, the lifting platform is movably sleeved on the periphery of the arch column through the through hole, and 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, the two lifting frames are located below the two winch supports respectively and fixedly connected with the lifting platform, and traction ropes of the two winches are connected with the tops of the two lifting frames respectively. The platform is lifted by the lifting system to move up and down along the spandrel column, a constructor can perform all-directional maintenance operation on the spandrel column on the platform, and the construction safety is ensured.

Description

Technical Field

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

[0002] For top-supported and mid-supported reinforced concrete arch bridges, arch columns are usually set on the main arch ring to support the main beam, and the arch columns serve as bridge piers. The arch columns are reinforced concrete structures. As the bridge ages, concrete may suffer from cracks, carbonization, surface corrosion and other defects, requiring regular maintenance and repair. The arch columns of large-span reinforced concrete arch bridges are relatively high, especially those near the side arches, which can reach a height of more than ten meters or even dozens of meters. It is difficult for operators to reach the top of the columns, and it is very dangerous to use climbing or suspension methods for maintenance. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problems and to provide a mobile maintenance work platform for the arch columns of a reinforced concrete arch bridge, so as to facilitate the maintenance of the arch columns and ensure the safety of construction operations.

[0004] The technical solution of the present invention 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 sleeved 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 tops 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 tops of the two lifting frames.

[0006] The present invention adopts a surrounding 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 operations on the arch columns on the platform and ensure construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a side structural view of the present invention;

[0008] Figure 2 It is a front view structural schematic diagram of the present invention;

[0009] Figure 3 It is a schematic diagram of the planar structure of the present invention;

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

[0011] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention includes a lifting platform and a platform lifting system; the lifting platform 1 is provided with a through hole in the middle, 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 tops 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 tops 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, and the construction workers can maintain various parts of the arch column on the platform.

[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 a plurality of 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 safety of construction workers on the platform, a platform guardrail 13 is provided around the lifting platform 1.

[0015] As a specific embodiment of the present invention, each winch bracket 3 includes two corbels 31, which are anchored on the top of the side walls 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 cross beam 42 is welded at the lower ends of the two suspension rods, and an upper cross beam 43 is welded between the upper ends of the two suspension rods. The lower cross beam 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 cross beams 43 of the two lifting frames.

[0017] When the present invention is implemented, in order to avoid direct contact between the lifting platform and the arch column during the lifting process, resulting in friction damage to the concrete of the column, the size of 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 will shake in the air and collide with the column, or the platform will tilt due to the unbalanced load on the lifting platform. In order to avoid the above problems, the present invention is also provided with a platform sliding system when it is implemented. The platform sliding system includes 4 guide rails 5 and 4 sliding wheel groups corresponding to the 4 guide rails, respectively. The 4 guide rails 5 are vertically anchored on both sides of the winch of the arch column 100, and each sliding wheel group includes a wheel frame 6 and two pulleys 7. The pulley 7 is rotatably arranged 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 upper column play a role in horizontal limiting and vertical guiding the platform, which can prevent the platform from shaking or tilting and 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 vertically arranged 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, a diagonal brace 8 can be fixedly arranged between the outer side of the lifting platform and each wheel frame.

[0021] The installation method of the present invention is as follows:

[0022] like Figure 4 As shown, an arch column 100 is provided on the main arch ring 200. When the arch column 100 is cast, guide rails 5 and bracket anchors are preset on the two opposite side walls of the arch column 100; the lifting platform 1 is welded and processed on the ground, and two lifting frames and four sliding wheel groups are welded and fixed to the lifting platform during processing; after the construction of the arch column is completed, the lifting platform 1 is mounted 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 crossbeams of the two lifting frames 4 to complete the installation of the maintenance work platform, and the lifting platform 1 can be towed up and down by the winch 2.

[0023] The maintenance platform is a regular maintenance device for the arch column, and can be lowered to the bottom of the column when idle. Since the top of the arch ring has a certain slope, the lower ends of the wheel frames 6 of the four sliding wheel groups at the bottom of the lifting platform can be supported on the base 101 of the arch column, playing the role of outriggers to keep the lifting platform 1 level.

Claims

1. A mobile maintenance work platform for arch columns of reinforced concrete arch bridges, 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 sleeved 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 on 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 work platform for the arch columns of reinforced concrete arch bridges according to claim 1 is 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 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 four platform modules.

3. The mobile maintenance work platform for arch columns of reinforced concrete arch bridges according to claim 1 or 2, characterized in that: A platform guardrail is arranged around the lifting platform.

4. The mobile maintenance work platform for the arch columns of reinforced concrete arch bridges according to claim 1 is characterized in that: Each winch bracket includes two brackets, the two brackets are anchored on the top of the side wall of the arch column, and 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 work 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 is welded at the lower ends of the two suspension rods, and an upper crossbeam is 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 work platform for arch columns of reinforced concrete arch bridges according to claim 1 is 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, and 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 work platform for the arch columns of reinforced concrete arch bridges according to claim 6 is characterized by: 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, the two wheel frame plates are vertically arranged in 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 work 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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