Maintenance operation platform for main arch ring of hanging type arch bridge

Abstract

The invention relates to a mounting type arch bridge main arch ring maintenance operation platform which comprises a walking system, a suspension system, a platform system and a platform lifting system. The walking system is provided with walking trolleys on the top faces of the two sides of the main arch ring respectively and can walk along rails arranged on the main arch ring, the suspension system is suspended on the two walking trolleys through a cantilever beam, platforms on the two sides of the platform system are located on the two sides of the main arch ring respectively, a lower platform is located below the main arch ring, and a winch of the lifting system is arranged on the suspension system. And the side platform and the lower platform are connected through a traction rope. The main arch ring maintenance platform is directly hung on a main arch ring and walks along the main arch ring, the influence on bridge floor traffic can be avoided, and constructors can carry out all-directional maintenance operation on the main arch ring on the platform.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge maintenance construction, and relates to a mounting type arch bridge main arch ring maintenance operation platform. Background Art

[0002] The main arch ring of a concrete arch bridge is cast with reinforced concrete. As the bridge's service life increases, the main arch ring concrete will develop cracks, carbonization, and surface corrosion, requiring regular maintenance and repair. The conventional maintenance method is to use a maintenance vehicle to hang a hanging basket on the bridge through a cantilever, lower the hanging basket to the outside of the bridge, and the construction workers work on the hanging basket. However, the hanging basket is prone to shaking in the air, which poses a great construction risk, and the workers cannot maintain the bottom surface of the arch ring; in addition, the maintenance vehicle is large in size, and traveling on the bridge deck will affect the normal passage of vehicles on the bridge. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problems and provide a mounted arch bridge main arch ring maintenance operation platform, which can carry out all-round maintenance of the main arch ring, ensure the safety of construction workers and avoid affecting the traffic on the bridge.

[0004] The technical solution of the present invention is as follows:

[0005] A mounted arch bridge main arch ring maintenance operation platform, characterized by comprising a walking system, a suspension system, a platform system and a platform lifting system;

[0006] The walking system includes two tracks and two walking trolleys; the two tracks are respectively arranged at the top of both sides of the main arch along the longitudinal direction of the main arch, the tracks are zigzag, and the top surface of each track is provided with teeth at equal intervals along the longitudinal direction of the track, and the bottom of each track is welded to the embedded parts at the top of the main arch; each walking trolley includes a frame, a walking wheel is arranged at the bottom of the frame, the walking wheel is a gear structure, a walking wheel driving motor is arranged in the middle of the top of the frame, a driving wheel is arranged on the transmission shaft of the walking wheel driving motor, and the driving wheel is connected to the rotating shaft of the walking wheel by a chain or a transmission belt, and the walking wheels of the two walking trolleys are respectively supported on the two tracks, and the gears of the walking wheels are meshed with the teeth on the tracks and can walk along the tracks;

[0007] The suspension system includes 4 cantilever beams and 4 suspension rods; two of the 4 cantilever beams are respectively welded in a transverse direction on the top of the frames of the two traveling trolleys, and there is a certain distance between the two cantilever beams on each traveling trolley. One end of each cantilever beam extends to a certain length outside the main arch ring to form an outer cantilever, and the other end extends to a certain length inside the main arch ring to form an inner cantilever; two of the 4 suspension rods are respectively arranged on both sides of the main arch ring, and the upper ends of the two suspension rods on each side of the main arch ring are respectively welded to the outer cantilevers of the two cantilever beams, and the lower ends of the four suspension rods extend to a certain length below the main arch ring, and an upper connecting beam is welded between the upper ends of the two suspension rods on each side of the main arch ring, and a lower connecting beam is welded between the lower ends of every two suspension rods opposite in the transverse direction on both sides of the main arch ring;

[0008] The platform system includes two side platforms and a lower platform. The side platforms are located on both sides of the main arch ring, and each side platform is located between two suspension rods. The lower platform is located between four suspension rods below the main arch ring.

[0009] The platform lifting system includes four winches, two of which are respectively arranged on the connecting beams of the two hangers on both sides of the main arch ring. One winch on each side of the main arch ring is connected to the side platform below it through a traction rope, and the other two winches on both sides of the main arch ring are connected to the two ends of the lower platform through traction ropes.

[0010] The present invention has the following advantages:

[0011] 1. Hang directly on the main arch ring and walk along the main arch ring to avoid affecting the traffic on the bridge deck;

[0012] 2. There are side platforms and bottom platforms, on which construction workers can carry out all-round maintenance work on the main arch ring;

[0013] 3. The structure is stable and safe, which can ensure the safety of construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a transverse bridge elevation view of the present invention;

[0015] Figure 2 This is a side view along the bridge direction of the present invention;

[0016] Figure 3 yes Figure 1 The enlarged view at A in the middle mainly shows the facade structure of the walking system and the anti-pull system;

[0017] Figure 4 yes Figure 2 The enlarged view at B in the middle mainly shows the side view structure of the walking system;

[0018] Figure 5 It is a side view of the structure of the anti-pull system;

[0019] Figure 6 This is the transverse elevation of the side platform;

[0020] Figure 7 This is a side view of the side platform along the bridge direction;

[0021] Figure 8 This is the transverse bridge elevation of the lower platform;

[0022] Fig. 9 This is a side view of the lower platform along the bridge. DETAILED DESCRIPTION

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present invention includes a walking system, a suspension system, a platform system and a platform lifting system;

[0024] The walking system includes two tracks 1 and two walking trolleys; the two tracks 1 are respectively arranged at the top of both sides of the main arch ring along the longitudinal direction of the main arch ring 22, the track 1 is zigzag, and the top surface of each track is provided with latch teeth at equal intervals along the longitudinal direction of the track, and the bottom of each track 1 is welded to the embedded part 21 at the top of the main arch ring 22; each walking trolley includes a frame 2, a walking wheel 3 is arranged at the bottom of the frame, the walking wheel 3 is a gear structure, a walking wheel driving motor 4 is arranged in the middle of the top of the frame, and a driving wheel is arranged on the transmission shaft of the walking wheel driving motor 4, and the driving wheel is connected to the rotating shaft of the walking wheel through a chain 5 or a transmission belt, and the walking wheels 3 of the two walking trolleys are respectively supported on the two tracks 1, and the gears of the walking wheel 3 are meshed with the latch teeth on the track 1 and can walk along the track;

[0025] The suspension system includes four cantilever beams 6 and four suspension rods 7; two of the four cantilever beams 6 are welded in a transverse direction on the top of the frame 2 of the two traveling trolleys, and there is a certain distance between the two cantilever beams 6 on each traveling trolley. One end of each cantilever beam 6 extends to a certain length outside the main arch ring 22 to form an outer cantilever, and the other end extends to a certain length inside the main arch ring to form an inner cantilever; two of the four suspension rods 7 are respectively arranged on both sides of the main arch ring, and the upper ends of the two suspension rods 7 on each side of the main arch ring are respectively welded to the outer cantilevers of the two cantilever beams 6, and the lower ends of the four suspension rods 7 extend to a certain length below the main arch ring 22, and an upper connecting beam 8 is welded between the upper ends of the two suspension rods 7 on each side of the main arch ring, and a lower connecting beam 9 is welded between the lower ends of every two suspension rods 7 opposite to each other in the transverse direction on both sides of the main arch ring;

[0026] The platform system includes two side platforms 10 and a lower platform 11. The side platforms 10 are respectively located on both sides of the main arch ring 22, and each side platform 10 is located between two suspension rods 7; the lower platform 11 is located between four suspension rods below the main arch ring 22;

[0027] The platform lifting system includes four winches 12, two of which are respectively arranged on the upper connecting beams 8 of the two hangers on both sides of the main arch ring. One winch 12 on each side of the main arch ring is connected to the side platform 10 below it through a traction rope 13, and the other two winches 12 on both sides of the main arch ring are connected to the two ends of the lower platform 11 through the traction ropes 13 respectively.

[0028] In the above structure, the winch 12 raises and lowers the traction side platform 10 and the lower platform 11 by retracting and releasing the traction rope 13. The construction personnel can perform all-round maintenance on both sides and the bottom of the main arch ring on the platform. The walking wheel driving motor 4 can drive the walking wheel 3 to move along the track 1, and the carrying platform can move longitudinally along the main arch ring. After the maintenance construction is completed at one place, it moves to the next construction position. The top surface of the main arch ring is arched. The present invention sets the track 1 and the walking wheel 3 to cooperate with each other, which can prevent the walking wheel from sliding down the slope when the walking wheel driving motor is turned off.

[0029] In order to prevent the platform from tilting the suspension system or derailing the running wheels due to unbalanced loading, the present invention also provides a reverse pull system during implementation. Figure 5 and Figure 3 , Figure 1 As shown in , the anti-pull system includes two anti-pull slide rails 14, two reaction beams 15 and two anti-pull rods 16. The two anti-pull slide rails 14 are respectively arranged at the top of both sides of the main arch ring 22 and below the inner cantilever end of the cantilever beam 6 along the longitudinal direction of the main arch ring. The bottom of each anti-pull slide rail 14 is welded to the embedded part 21 at the top of the main arch ring. A C-shaped slide groove 141 is longitudinally arranged at the top of each anti-pull slide rail. The two reaction beams 15 are respectively welded between the inner cantilever ends of the two cantilever beams 6 on each side of the main arch ring. The upper ends of the two anti-pull rods 16 are respectively welded to the middle of the two reaction beams 15. The lower ends of the two anti-pull rods 16 are respectively provided with anti-pressure rollers 17. The anti-pressure rollers 17 at the lower ends of the two reaction rods are respectively stuck in the slide grooves 141 of the two anti-pull slide rails 14 and can slide along the slide grooves.

[0030] In the above structure, since the back-pressure roller 17 of the back-pull system is confined in the slide groove 141 of the back-pull slide rail, a downward back-pull force is provided to the short cantilever end of the cantilever beam 6, which can resist the load force borne by the long cantilever end of the cantilever beam, thereby keeping the suspension system balanced and avoiding tilting due to unbalanced loading.

[0031] In the specific implementation of the present invention, in order to strengthen the connection strength between the two suspension rods on each side of the main arch ring, scissor struts 18 are respectively welded between the upper ends and the lower ends of the two suspension rods 7 on each side of the main arch ring.

[0032] like Figure 6 , Figure 7As shown, each side platform 10 includes two upper cross beams 101 on the side platforms and two lower cross beams 102 on the side platforms. The cross beams 101 on the two side platforms and the lower cross beams 102 on the side platforms are arranged between the two hangers 7 in the bridge direction. Support rods 103 are welded to the two ends of the cross beam 101 on each side platform and the two ends of the lower cross beam 102 on one side platform respectively. Two side platform limiting rods 104 are welded to the bottom of the cross beams on the two side platforms and the bottom of the lower cross beams on the two side platforms on both sides of the two hangers along the bridge direction. The length of the side platform limiting rods 104 is greater than the spacing between the two hangers 7. Multiple side platform distribution beams 105 are welded between the cross beams 101 on the two side platforms. Side platform distribution beams are laid with side platform panels 106, and side platform guardrails 107 are welded around the side platform panels.

[0033] In the above structure, the two suspension rods 7 can limit the side platform 10 from shaking or tilting along the bridge direction, and the limit rod 104 can limit the side platform 10 from shaking or tilting transversely to the bridge, so that the side platform can keep balance in the air. When the side platform is raised and lowered, the suspension rod plays a guiding role.

[0034] like Figure 6 As shown in , when the present invention is implemented, the length of the upper crossbeam 101 of the side platform can be set to be greater than the length of the lower crossbeam 102 of the side platform. In this way, the area of ​​the side platform can be expanded, and the volume and weight of the side platform can be reduced.

[0035] In order to further enhance the structural strength of the side platform, a diagonal brace 108 may be welded between the two supporting rods at each end of the upper crossbeam of the side platform and the lower crossbeam of the side platform.

[0036] like Figure 8 , Fig. 9 As shown, the lower platform 11 includes four lower platform load-bearing beams 111 arranged in the transverse direction, two of the four lower platform load-bearing beams 111 are respectively arranged on both sides of the hangers 7 opposite to each other in the transverse direction, lower platform limit rods 112 are welded at both ends of the four lower platform load-bearing beams 111 on both sides of the two hangers 7 on each side of the main arch ring, multiple lower platform distribution beams 113 are constructed between the top surfaces of the four lower platform load-bearing beams 111, lower platform panels 114 are laid on the lower platform distribution beams 113, and lower platform guardrails 115 are welded around the lower platform panels 114.

[0037] When the present invention is implemented, the connection and traction method between the winch of the platform lifting system and the side platform and the lower platform can be adopted in the following ways: Figure 2 , Figure 4 As shown in FIG, an anchor beam 19 is welded along the bridge direction on the inner side of one of the two suspension rods 7 on the two suspension rod connecting beams 8 on both sides of the main arch ring, and a winch 12 is arranged on the inner side of the other suspension rod on the connecting beam; Figure 1 , Figure 2 and Figures 6 to 9As shown in the figure, a side platform support beam 109 is welded along the bridge direction between the middle bottom surfaces of the lower cross beams 102 on both sides of each side platform 10, and steering wheels 20 are respectively provided at both ends of the side platform support beam 109. The traction rope 13 of the winch connected to the side platform passes around the steering wheels 20 at both ends of the side platform support beam and is connected to the upper anchor beam 19; the bottom surfaces at both ends of the lower platform 11 are respectively welded along the bridge direction to a lower platform support beam 116, and steering wheels 20 are respectively provided at both ends of each lower platform support beam 116. The traction ropes 13 of the two winches connecting the lower platform pass around the steering wheels 20 at both ends of the two lower platform support beams 116 and are connected to the upper anchor beam 19.

Claims

1. A mounted arch bridge main arch ring maintenance operation platform, characterized by: Including walking system, suspension system, platform system and platform lifting system; The walking system includes two tracks and two walking trolleys; the two tracks are respectively arranged at the top of both sides of the main arch along the longitudinal direction of the main arch, the tracks are zigzag, and the top surface of each track is provided with teeth at equal intervals along the longitudinal direction of the track, and the bottom of each track is welded to the embedded parts at the top of the main arch; each walking trolley includes a frame, a walking wheel is arranged at the bottom of the frame, the walking wheel is a gear structure, a walking wheel driving motor is arranged in the middle of the top of the frame, a driving wheel is arranged on the transmission shaft of the walking wheel driving motor, and the driving wheel is connected to the rotating shaft of the walking wheel by a chain or a transmission belt, and the walking wheels of the two walking trolleys are respectively supported on the two tracks, and the gears of the walking wheels are meshed with the teeth on the tracks and can walk along the tracks; The suspension system includes 4 cantilever beams and 4 suspension rods; two of the 4 cantilever beams are respectively welded in a transverse direction on the top of the frames of the two traveling trolleys, and there is a certain distance between the two cantilever beams on each traveling trolley. One end of each cantilever beam extends to a certain length outside the main arch ring to form an outer cantilever, and the other end extends to a certain length inside the main arch ring to form an inner cantilever; two of the 4 suspension rods are respectively arranged on both sides of the main arch ring, and the upper ends of the two suspension rods on each side of the main arch ring are respectively welded to the outer cantilevers of the two cantilever beams, and the lower ends of the four suspension rods extend to a certain length below the main arch ring, and an upper connecting beam is welded between the upper ends of the two suspension rods on each side of the main arch ring, and a lower connecting beam is welded between the lower ends of every two suspension rods opposite in the transverse direction on both sides of the main arch ring; The platform system includes two side platforms and a lower platform. The side platforms are located on both sides of the main arch ring, and each side platform is located between two suspension rods. The lower platform is located between four suspension rods below the main arch ring. The platform lifting system includes four winches, two of which are respectively arranged on the connecting beams of the two hangers on both sides of the main arch ring. One winch on each side of the main arch ring is connected to the side platform below it through a traction rope, and the other two winches on both sides of the main arch ring are connected to the two ends of the lower platform through traction ropes.

2. The mounting type arch bridge main arch ring maintenance operation platform according to claim 1 is characterized by: It also includes a back-pull system, which includes two back-pull slide rails, two reaction beams and two back-pull rods. The two back-pull slide rails are respectively arranged at the top of both sides of the main arch ring and below the inner cantilever end of the cantilever beam along the longitudinal direction of the main arch ring. The bottom of each back-pull slide rail is welded to the embedded parts at the top of the main arch ring. A C-shaped slide groove is longitudinally arranged on the top of each back-pull slide rail. The two reaction beams are respectively welded between the inner cantilever ends of the two cantilever beams on each side of the main arch ring. The upper ends of the two back-pull rods are respectively welded to the middle of the two reaction beams. The lower ends of the two back-pull rods are respectively provided with back-pressure rollers. The back-pressure rollers at the lower ends of the two reaction rods are respectively stuck in the slide grooves of the two back-pull slide rails and can slide along the slide grooves.

3. The mounting type arch bridge main arch ring maintenance operation platform according to claim 1 or 2, characterized in that: Scissor braces are welded between the upper and lower ends of the two hangers on each side of the main arch ring.

4. The mounting type arch bridge main arch ring maintenance operation platform according to claim 1 or 2, characterized in that: Each side platform includes two upper cross beams on the side platforms and two lower cross beams on the side platforms. The cross beams on the two side platforms and the lower cross beams on the side platforms are arranged transversely between two hangers. Support rods are welded to the two ends of the cross beam on each side platform and the two ends of the lower cross beam on one side platform respectively. Two side platform limiting rods are welded to the bottom of the cross beams on the two side platforms and the bottom of the lower cross beams on the two side platforms on both sides along the bridge direction of the two hangers respectively. The length of the side platform limiting rods is greater than the spacing between the two hangers. Multiple side platform distribution beams are welded between the cross beams on the two side platforms. Side platform distribution beams are laid on the side platform distribution beams, and side platform guardrails are welded around the side platform panels.

5. The mounting type arch bridge main arch ring maintenance operation platform according to claim 4 is characterized in that: The length of the upper crossbeam of the side platform is greater than the length of the lower crossbeam of the side platform.

6. The mounting type arch bridge main arch ring maintenance operation platform according to claim 4 is characterized by: An oblique brace is welded between two supporting rods at each end of the upper crossbeam of the side platform and the lower crossbeam of the side platform.

7. The mounting type arch bridge main arch ring maintenance operation platform according to claim 1 or 2, characterized in that: The lower platform includes four lower platform load-bearing beams arranged in the transverse direction of the bridge, two of the four lower platform load-bearing beams are respectively arranged on both sides of the hangers opposite to each other in the transverse direction, lower platform limit rods are welded on both sides of the two hangers on each side of the main arch ring at both ends of the four lower platform load-bearing beams, multiple lower platform distribution beams are constructed between the top surfaces of the four lower platform load-bearing beams, lower platform panels are laid on the lower platform distribution beams, and lower platform guardrails are welded around the lower platform panels.

8. The mounting type arch bridge main arch ring maintenance operation platform according to claim 1 or 2, characterized in that: An anchor beam is welded along the bridge direction on the two hanger connecting beams on both sides of the main arch ring; a side platform supporting beam is welded along the bridge direction between the middle bottom surfaces of the lower cross beams on both sides of each side platform, and steering wheels are respectively provided at both ends of the side platform supporting beam. The traction rope of the winch connected to the side platform passes around the steering wheels at both ends of the side platform supporting beam and is connected to the upper anchor beam; a lower platform supporting beam is welded along the bridge direction on the bottom surfaces at both ends of the lower platform, and steering wheels are respectively provided at both ends of each lower platform supporting beam. The traction ropes of the two winches connecting the lower platform pass around the steering wheels at both ends of the two lower platform supporting beams and are connected to the upper anchor beam.

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