A whole high-level piggyback construction method of a bridge girder erection machine

Abstract

The present application relates to a kind of whole high-level piggyback construction method of bridge girder erection machine, after the last hole bridge of bridge girder erection machine is set up, two beam transporters are driven to the below of bridge girder erection machine, pad pier is respectively set on two beam transporters, two trolley cranes of bridge girder erection machine are used as counterweight and moved forward and backward, and bridge girder erection machine is stably supported on two beam transporters, and two beam transporters piggyback bridge girder erection machine and return to beam lifting station.The present application can realize the whole high-level piggyback of kiloton bridge girder erection machine, does not occupy large hoisting auxiliary equipment, process is simple, can save construction period, and is safe and efficient.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, specifically to a method for high-level transport of the bridge erecting machine using a beam transport vehicle, ensuring the stability and safety of the machine during transport. Background Technology

[0002] When using a bridge erecting machine for bridge construction, if the bridge is erected in two directions, after completing the erection of the first box girder, the machine needs to be transported to the beam-lifting station to turn around and erect the second box girder. A bridge erecting machine generally includes a main girder, front, middle, and rear support legs, and front and rear overhead cranes that travel on the main girder. Traditionally, the support legs and overhead cranes are removed on-site, and the main girder is lowered onto a beam-transporting vehicle for securing and transport. This method is considered low-position transport, requiring large auxiliary lifting equipment and is time-consuming. However, low-position transport facilitates passage through tunnels or construction access roads, making it suitable for situations where the bridge erecting machine needs to be moved after completing the erection of a bridge. In contrast, the bridge erecting machine used for the first and second erections is transported on the bridge itself, without needing to pass through tunnels or construction access roads. If a low-position transport method is also used for this purpose, the cost and efficiency will be relatively high.

[0003] Patent CN114370006A discloses "a construction method for transporting a bridge erecting machine by a beam transport vehicle". It involves setting a front and rear carrying support on a beam transport vehicle, driving the beam transport vehicle under the bridge erecting machine, and using the front and rear carrying support to support the bridge erecting machine for transport. This method can achieve high-level transport, but it is only suitable for small bridge erecting machines. For thousand-ton-class bridge erecting machines, due to the long main beam and large cantilever, two beam transport vehicles are required to carry the machine. The process of the beam transport vehicle supporting the bridge erecting machine involves multiple stress conversions under different working conditions, so the above method cannot be used directly. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a method for transporting a bridge erecting machine at a high position, thereby enabling the overall high-position transport of large-tonnage bridge erecting machines and accelerating the construction progress.

[0005] The technical solution of the present invention is as follows:

[0006] A method for high-level transport of a bridge erecting machine, the bridge erecting machine comprising a main beam, front, middle, and rear support legs for supporting the main beam, and front and rear overhead cranes traveling on the main beam, characterized by comprising the following steps:

[0007] (1) After the bridge erecting machine completes the last span of the bridge, while the bridge erecting machine is in the beam erection state at the front and rear trolleys and all outriggers, two beam transport vehicles drive under the bridge machine in sequence. The front beam transport vehicle drives to the front end and close to the middle outrigger, and the rear beam transport vehicle drives to the bottom of the rear outrigger. The rear outrigger is lowered so that it is supported on the load-bearing beam of the rear beam transport vehicle.

[0008] (2) Set up a front support on the front beam transport vehicle, raise the suspension of the front beam transport vehicle so that the front support is supported on the bottom surface of the main beam of the bridge erecting machine; move the front and rear overhead cranes of the bridge erecting machine to the rear of the bridge erecting machine.

[0009] (3) The bridge erecting machine raises the middle support leg, moves the middle support leg forward to be close to the front support leg, and then lowers the middle support leg to support the force at the same time as the front support leg;

[0010] (4) Move the front beam to the front end of the main beam; retract the suspension of the front beam transport vehicle so that the front support pier is no longer in contact with the main beam of the bridge erecting machine.

[0011] (5) The front beam transport vehicle moves forward to the position of the center of the front support pier directly opposite the main beam. The distance from the front end of the main beam is 1 / 3 of the total length of the main beam. The suspension is raised so that the front support pier can support the main beam of the bridge erecting machine again.

[0012] (6) Move the rear overhead crane to above the front beam transport vehicle;

[0013] (7) Raise the rear outriggers to separate them from the rear beam transport vehicle. Move the rear beam transport vehicle forward to its front end close to the rear end of the front beam transport vehicle. Then lower the rear outriggers to support the bridge deck. Install the rear pad pier on the rear beam transport vehicle. The center of the rear pad pier is directly opposite the main beam. The distance from the rear end of the main beam to the main beam is 1 / 3 of the total length of the main beam. Raise the suspension of the rear beam transport vehicle so that the rear pad pier supports the main beam of the bridge erecting machine.

[0014] (8) The rear vehicle is moved to the rear pad on the rear beam transport vehicle and the suspension of the front beam transport vehicle is lowered.

[0015] (9) The front beam transport vehicle moves forward to the front end near the middle support leg, and the suspension of the front beam transport vehicle is raised to support the main beam;

[0016] (10) The front girder car is moved to the space between the front and rear girder transport cars, and the rear girder car is moved to a position that is offset from the support position of the rear pier. The front, middle and rear outriggers of the bridge erecting machine are retracted, and the bridge erecting machine is carried by two girder transport cars. The two girder transport cars carry the bridge erecting machine back to the beam lifting station.

[0017] This invention utilizes two beam transport vehicles to carry a large-tonnage bridge erecting machine at a high position. By using the two overhead cranes of the bridge erecting machine to move back and forth as counterweights, the entire bridge erecting machine can be stably placed on the two beam transport vehicles. It has the advantages of saving construction time, simplifying the process, not occupying large lifting auxiliary equipment, and being safe and efficient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the state of the two beam transport vehicles as they drive under the bridge erecting machine;

[0019] Figure 2 This is a schematic diagram showing the state of the front beam transport vehicle supporting the middle of the bridge erecting machine;

[0020] Figure 3 This is a schematic diagram showing the state of the bridge erecting machine after the outriggers have been moved forward;

[0021] Figure 4 This is a schematic diagram showing the state when the front beam transport vehicle and the main beam of the bridge erecting machine lose contact.

[0022] Figure 5 This is a schematic diagram showing the state of the bridge erecting machine's main beam as the front beam transport vehicle moves forward and re-supports the beam.

[0023] Figure 6 This is a schematic diagram showing the state of the vehicle when it is moved to the front of the beam transport vehicle.

[0024] Figure 7 This is a schematic diagram showing the state of the rear beam transport vehicle when it has moved into position.

[0025] Figure 8 This is a schematic diagram showing the state when the vehicle is moved to the top of the load-bearing beam of the rear transport beam vehicle;

[0026] Figure 9 This is a schematic diagram showing the state of the front beam transport vehicle when it has moved into position.

[0027] Figure 10 This is a schematic diagram showing the state when the bridge erecting machine is entirely supported by two beam transport vehicles. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1 to 10 The specific implementation process of the present invention will be described below. In this embodiment, the bridge erecting machine includes a main beam 1, front support legs 2, middle support legs 3 and rear support legs 4 for supporting the main beam, and front overhead cranes 5 and rear overhead cranes 6 that travel on the main beam. The main beam is approximately 80m long.

[0029] (1) As Figure 1 As shown, after the bridge erecting machine completes the erection of the last span, with the front and rear gantry cranes and all outriggers in the beam-erecting state, two beam transport vehicles sequentially drive under the bridge erecting machine. The front beam transport vehicle 7 moves to the front end near the middle outrigger 3, and the rear beam transport vehicle 8 moves to the area under the rear outrigger 4. While the bridge erecting machine is in the beam-erecting state, the rear outrigger 4 is suspended in the air. After the rear beam transport vehicle reaches its position, the rear outrigger 4 is lowered so that it rests on the load-bearing beam of the rear beam transport vehicle 8.

[0030] (2) Figure 2 As shown, a front support 9 is set on the front beam transport vehicle 7, and the suspension of the front beam transport vehicle is raised so that the front support 9 is supported on the bottom of the main beam 1 of the bridge erecting machine; the rear overhead crane 6 of the bridge erecting machine is moved to the rear of the bridge erecting machine, and the front overhead crane 5 is moved above the front beam transport vehicle 7.

[0031] (3) Figure 3 As shown, the bridge erecting machine raises the middle support leg, moves the middle support leg 3 forward to be close to the front support leg 2, and then lowers the middle support leg to support the force at the same time as the front support leg. Since the middle support leg is moved forward, the middle of the main beam lacks support. In the above step (2), the front and rear trolleys are moved to the rear of the bridge erecting machine to prevent the gravity of the trolleys from causing the middle of the main beam to deflect downward, and at the same time, they serve as counterweights at the rear end of the main beam.

[0032] (4) Figure 4 As shown, the front trolley 5 moves to the front end of the main beam; the suspension of the front beam transport vehicle 7 is retracted, so that the front support 9 is disengaged from the main beam 1 of the bridge erecting machine.

[0033] The aforementioned move of the front-end trolley to the very front of the main beam is also to prevent the main beam from deflecting due to the weight of the front-end trolley after the height of the front pier 9 decreases.

[0034] (5) Figure 5 As shown, the front beam transport vehicle 7 moves forward to the position of the center of the front support pier 9 directly opposite the main beam. The distance from the front end of the main beam is 1 / 3 of the total length of the main beam. The suspension of the front beam transport vehicle is raised so that the front support pier 9 can support the main beam of the bridge erecting machine again.

[0035] (6) Figure 6 As shown, the rear overhead crane 6 is moved forward to above the front beam transport vehicle 7; this is to prepare for the rear beam transport vehicle to move forward.

[0036] (7) Figure 7 As shown, the rear outrigger is first raised to detach from the rear beam transport vehicle, and the rear beam transport vehicle 8 is moved forward to its front end near the rear end of the front beam transport vehicle. Then the rear outrigger 4 is lowered to support the bridge deck. Then the rear support pier 10 is installed on the rear beam transport vehicle 8. The center of the rear support pier is directly opposite the main beam, and the distance from the rear end of the main beam is 1 / 3 of the total length of the main beam. The suspension of the rear beam transport vehicle is raised so that the rear support pier 10 supports the main beam 1 of the bridge erecting machine.

[0037] Since the rear support leg is raised and the rear end of the main beam is in a cantilever state, in the above step (6), the front crane is moved to the front beam transport vehicle. At the same time, the front crane is already at the front end of the main beam. Therefore, the front and rear cranes can be used as counterweights to prevent the main beam from overturning when the rear end is in a cantilever state.

[0038] (8) Figure 8 As shown, the rear beam transport vehicle 6 moves to the rear support 10 on the rear beam transport vehicle 8, and then the suspension of the front beam transport vehicle is lowered to prepare for the front beam transport vehicle to move forward.

[0039] (9) such as Figure 9 As shown, the front beam transport vehicle 7 moves forward to the front end near the middle support leg 3, and then the suspension of the front beam transport vehicle is raised again so that the front support pier supports the main beam.

[0040] (10) such as Figure 10As shown, the front girder carrier 5 is moved to a position above the space between the front and rear girder transport vehicles, and the rear girder carrier 6 is moved to a position offset from the rear support pier. The front, middle, and rear outriggers of the bridge erecting machine are retracted, and the entire bridge erecting machine is carried by the two girder transport vehicles. The two girder transport vehicles are driven synchronously to carry the bridge erecting machine back to the beam lifting station. The support positions of the two girder transport vehicles on the main beam and the positions of the two girder carriers are determined after calculation of the center of gravity position of the bridge erecting machine under this working condition, which can maintain the balance and stability of the bridge erecting machine on the two girder transport vehicles during the carrying process.

Claims

1. A method for high-level transport construction of a bridge erecting machine, the bridge erecting machine comprising a main beam, front legs, middle legs, and rear legs for supporting the main beam, and front and rear overhead cranes traveling on the main beam, characterized in that, Includes the following steps: (1) After the bridge erecting machine completes the last span of the bridge, while the bridge erecting machine is in the beam erection state at the front and rear trolleys and all outriggers, two beam transport vehicles drive under the bridge machine in sequence. The front beam transport vehicle drives to the front end and close to the middle outrigger, and the rear beam transport vehicle drives to the bottom of the rear outrigger. The rear outrigger is lowered so that it is supported on the load-bearing beam of the rear beam transport vehicle. (2) Set up a front support on the front beam transport vehicle, raise the suspension of the front beam transport vehicle so that the front support is supported on the bottom surface of the main beam of the bridge erecting machine; move the front and rear overhead cranes of the bridge erecting machine to the rear of the bridge erecting machine. (3) The bridge erecting machine raises the middle support leg, moves the middle support leg forward to be close to the front support leg, and then lowers the middle support leg to support the force at the same time as the front support leg; (4) Move the front beam to the front end of the main beam; retract the suspension of the front beam transport vehicle so that the front support pier is no longer in contact with the main beam of the bridge erecting machine. (5) The front beam transport vehicle moves forward to the position of the center of the front support pier directly opposite the main beam. The distance from the front end of the main beam is 1 / 3 of the total length of the main beam. The suspension is raised so that the front support pier can support the main beam of the bridge erecting machine again. (6) Move the rear overhead crane to above the front beam transport vehicle; (7) Raise the rear outriggers to separate them from the rear beam transport vehicle. Move the rear beam transport vehicle forward to its front end close to the rear end of the front beam transport vehicle. Then lower the rear outriggers to support the bridge deck. Install the rear pad pier on the rear beam transport vehicle. The center of the rear pad pier is directly opposite the main beam. The distance from the rear end of the main beam to the main beam is 1 / 3 of the total length of the main beam. Raise the suspension of the rear beam transport vehicle so that the rear pad pier supports the main beam of the bridge erecting machine. (8) The rear vehicle is moved to the rear pad on the rear beam transport vehicle and the suspension of the front beam transport vehicle is lowered. (9) The front beam transport vehicle moves forward to the front end near the middle support leg, and the suspension of the front beam transport vehicle is raised to support the main beam; (10) The front girder car is moved to the space between the front and rear girder transport cars, and the rear girder car is moved to a position that is offset from the support position of the rear pier. The front, middle and rear outriggers of the bridge erecting machine are retracted, and the bridge erecting machine is carried by two girder transport cars. The two girder transport cars carry the bridge erecting machine back to the beam lifting station.

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