Method for transporting a bridge-launching machine

Abstract

The application discloses a bridge-erecting machine transportation method, which comprises the following steps: step one, hoisting and assembling a bridge-erecting machine main beam assembly, a front support leg assembly, a middle support leg assembly, a tail support leg assembly, a temporary support leg assembly, a longitudinal truss trolley assembly and a hoisting trolley assembly, so that the temporary support leg, the front support leg, the middle support leg and the tail support leg are sequentially installed on the main beam; step two, after the front support leg, the middle support leg and the tail support leg are installed at the rear end of the main beam and supported in place, a pair of fixed cross beams are installed; step three, the main beam is lifted, the temporary support leg is supported in place, and the hoisting trolley lifts and retracts the middle support leg; step four, the main beam is lowered, and a transportation main vehicle and a transportation auxiliary vehicle are respectively connected with pin shafts of the pair of fixed cross beams; and step five, the front support leg and the tail support leg are lifted and retracted, and the transportation main vehicle and the transportation auxiliary vehicle synchronously travel to a predetermined position. The application can not only transport a bridge box girder, but also improve the efficiency of bridge construction operation and reduce construction cost, and does not need to be repeatedly disassembled and assembled, so that the application has good popularization and application value.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology. More specifically, this invention relates to a method for transporting a bridge erecting machine. Background Technology

[0002] A bridge erecting machine is a device that places prefabricated box girders onto prefabricated bridge piers. In bridge construction, the movement and operation of bridge erecting machines involve their transportation. The transportation device, as the main component of the bridge erecting machine, plays a crucial role. However, existing transportation devices can only achieve the simple process of transporting the bridge erecting machine to the site; their contribution to bridge construction is limited. Therefore, improving the transportation device and methods, and applying them to various construction processes to increase the operating efficiency of the bridge erecting machine, is an inevitable trend. Summary of the Invention

[0003] This invention provides a method for transporting bridge erecting machines, which can not only transport bridge box girders, but also improve the efficiency of bridge construction operations, reduce construction costs, and eliminate the need for repeated disassembly and assembly, thus having good potential for widespread application.

[0004] To achieve these objectives and other advantages according to the present invention, a method for transporting a bridge erecting machine is provided, comprising:

[0005] Step 1: The hoisting and assembly of the main girder assembly, front outrigger assembly, middle outrigger assembly, tail outrigger assembly, temporary outrigger assembly, longitudinal gantry assembly, and crane trolley assembly of the bridge erecting machine, so that the temporary outrigger, front outrigger, middle outrigger, and tail outrigger are installed on the main girder in sequence.

[0006] Step 2: Position the front outrigger and middle outrigger at 1 / 4 and 3 / 4 of the main beam respectively and support them in place. Install the tail outrigger at the rear end of the main beam and support it in place. Install a pair of fixed crossbeams between the temporary outrigger and the front outrigger, and between the middle outrigger and the tail outrigger respectively.

[0007] Step 3: Extend the cylinders of the front and rear outriggers to raise the main beam to more than 1.5m off the ground, so that the temporary outriggers are in place, and then lift and retract the middle outriggers of the crane trolley.

[0008] Step 4: The main transport vehicle travels to the fixed crossbeam between the middle and rear outriggers, and the auxiliary transport vehicle travels to the fixed crossbeam between the temporary and front outriggers. The temporary outriggers are retracted, and the cylinders of the front and rear outriggers are retracted to lower the main beam. The main transport vehicle and the auxiliary transport vehicle are then connected to a pair of fixed crossbeam pins.

[0009] Step 5: Retract the front outrigger cylinders and the tail outrigger cylinders, raise and retract the front and tail outriggers, and the transport vehicle and the transport auxiliary vehicle will move synchronously to the predetermined position.

[0010] Preferably, it includes:

[0011] Step 5: The main transport vehicle and the auxiliary transport vehicle move synchronously to the bridgehead position so that the temporary outriggers are positioned above the pier cap;

[0012] Step 6: Disconnect the pin connections between the main transport vehicle, the auxiliary transport vehicle, and the pair of fixed crossbeams; extend the front outrigger cylinders and the rear outrigger cylinders to raise the main beam until the pair of fixed crossbeams are detached from the main transport vehicle and the auxiliary transport vehicle; install temporary outriggers between the front end of the main beam and the platform cap and support them in place.

[0013] Step 7: The main transport vehicle and the auxiliary transport vehicle drive away, and a pair of fixed crossbeams are disassembled and removed;

[0014] Step 8: Retract the front outrigger cylinder to raise and retract the front outrigger, so that the front outrigger stops at the front end of the main beam. Install the front outrigger between the front end of the main beam and the pier and support it in place. Install the middle outrigger and support it in place.

[0015] Preferably, it includes:

[0016] Step nine: Install the longitudinal rails and the transverse rails on the next span pier;

[0017] Step 10: Extend the front outrigger cylinder and the tail outrigger cylinder to raise the main beam to more than 1.5m off the ground, stop the middle outrigger at 1 / 2 position, retract the front outrigger cylinder and the tail outrigger cylinder and support them in place, and support the middle outrigger in place.

[0018] Step 11: The crane trolley moves to the rear end of the main beam, and the transport trolley and transport auxiliary vehicle transport the box girder and drive to the bottom of the main beam simultaneously. The crane trolley is attached to the box girder as a counterweight.

[0019] Step 12: Slide the front outrigger and middle outrigger to the main beam, and slide the tail outrigger to the longitudinal track. Start the drive assembly to move the main beam forward and at the same time move the crane trolley backward, so that the crane trolley is stationary relative to the counterweight sub-assembly composed of the transport trolley, transport auxiliary trolley and box girder, until the main beam moves forward to the point where the temporary outrigger is above the cap of the next span pier.

[0020] Step 13: Remove the counterweight box girder, install temporary outriggers between the front end of the main girder and the cap of the next span pier and support them in place, install the tail outriggers and support them in place, retract the front outrigger cylinders, lift and retract the front outriggers so that the front outriggers stop at the front end of the main girder, install the front outriggers on the transverse track of the next span pier and support them in place, stop the middle outriggers at 3 / 4 of the main girder and support them in place, and retract the temporary outriggers.

[0021] Preferably, the transport vehicle and transport auxiliary vehicle in steps four to seven include:

[0022] The main body of the vehicle has a load-bearing plate as its load-bearing surface.

[0023] A pair of extension plates are symmetrically arranged on both sides of the vehicle body, and the extension plates are rotatably connected to the vehicle body via a first hinge shaft;

[0024] A pair of support plates, each including a fixed plate and a rotating plate connected by a second hinge shaft, wherein the fixed plate is mounted below the load-bearing plate and the rotating plate is located below the vehicle body and the load-bearing plate and supports the first hinge shaft;

[0025] Several reinforcing ribs are inclinedly disposed between the column of the vehicle body and the rotating plate of the support plate. The reinforcing ribs include a bracket section and a diagonal brace section. The bracket section is inclinedly disposed on the column of the vehicle body. The lower end of the diagonal brace section is movably connected to the bracket section. The upper end of the diagonal brace section is hinged to the rotating plate. The joint between the diagonal brace section and the bracket section is located below the fixed plate.

[0026] Preferably, the transport main vehicle and transport auxiliary vehicle in steps eleven to twelve include the vehicle body.

[0027] Preferably, the support is secured by erecting sleepers and pads.

[0028] The present invention has at least the following beneficial effects:

[0029] First, this invention involves hoisting, assembling, and transporting various components of the bridge erecting machine, which is a comprehensive transfer construction method. The front support leg, middle support leg, tail support leg, and temporary support leg work together, and the main transport vehicle and auxiliary transport vehicle are connected to the main beam pin shaft for transportation, thereby improving transfer efficiency and ensuring the stability of the bridge erecting machine during transportation.

[0030] Secondly, this invention, through the cooperation of the main transport vehicle and the auxiliary transport vehicle, enables the main beam to be transported to the designated location, lowered, and supported on the bridge piers. The bridge erecting machine does not need to be disassembled and reassembled, ensuring the stability of the support, improving the efficiency of bridge construction operations, reducing construction costs, and eliminating the need for repeated disassembly and assembly. It has good potential for widespread application.

[0031] Third, by coordinating the main transport vehicle and the auxiliary transport vehicle, this invention ensures that the main beam achieves self-weight counterweight during the crossing of the span, meets the counterweight construction requirements, greatly reduces the safety factors caused by insufficient load of a single transport vehicle, further improves the utilization rate of the main transport vehicle and the auxiliary transport vehicle, and enhances the safety of the bridge erecting machine.

[0032] Fourth, the conventional main beam transportation and unloading process requires widening and reinforcing the vehicle body. When the main beam passes through the hole, the box girder counterweight needs to be transported, which can be achieved by adding a main transport vehicle and a secondary transport vehicle to support the box girder. The width can be expanded by setting extension plates, and the reinforcement can be strengthened by setting support plates and reinforcing ribs. The position and state of the extension plates can be easily switched by hinge shafts and other hinge methods to quickly carry out different transportation operations.

[0033] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0034] Figure 1 This is a structural force diagram of the main transport vehicle. Detailed Implementation

[0035] The present invention will now be described in further detail to enable those skilled in the art to implement it based on the description.

[0036] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0037] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials mentioned are commercially available. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0038] This invention provides a method for transporting a bridge erecting machine, comprising:

[0039] Step one: The bridge erecting machine mainly consists of the main beam, anti-roller system, front outriggers, middle outriggers, tail outriggers, longitudinal gantry crane, crane trolley, traverse track, generator platform, and control room. The hoisting and assembly of the main beam assembly, front outrigger assembly, middle outrigger assembly, tail outrigger assembly, temporary outrigger assembly, longitudinal gantry crane assembly, and crane trolley assembly involves transporting each component to one side of the bridge passage, unloading it using a truck crane, and then assembling it on the beam exit passage. The main beam is assembled on the ground, including the main beam assembly, the front outrigger assembly and anti-roller assembly, the middle outrigger assembly and anti-roller assembly, and the longitudinal gantry crane assembly. The hoisting trolley (2 units) is assembled and hoisted, including the positioning and hoisting of the front and middle outriggers. Temporary diagonal braces are used for fixation to prevent overturning. After hoisting, the anti-roller assembly is placed on the front and middle outriggers and connected with bolts after positioning. The entire main beam on both sides is hoisted and placed on the anti-roller assembly. After positioning, the main beam and anti-roller are fully connected and fixed according to the design drawings. The anti-roller assembly hangers are installed and the pressure plates are fixed. After hoisting, the temporary outriggers and tail outriggers are placed on the main beam. The longitudinal gantry crane is hoisted and placed on the main beam. The hoisting trolley is hoisted and placed on the main beam. Electrical installation is carried out so that the temporary outriggers, front outriggers, middle outriggers and tail outriggers are installed on the main beam in sequence.

[0040] Step 2: Position the front outrigger and middle outrigger at 1 / 4 and 3 / 4 of the main beam respectively, and then position the rear outrigger at the rear end of the main beam. Positioning is achieved by erecting sleepers and pads. Install a pair of fixed crossbeams between the temporary outrigger and the front outrigger, and between the middle outrigger and the rear outrigger. The fixed crossbeams are located below the main beam and are used for installation with the transport vehicle and the transport auxiliary vehicle.

[0041] Step 3: After the bridge erecting machine is assembled, extend the hydraulic cylinders of the front and rear outriggers to raise the main beam to more than 1.5m off the ground, so that the temporary outriggers are in place. Then, lift the trolley and retract the middle outriggers and retract the sleepers.

[0042] Step 4: Each end of the main transport vehicle and the auxiliary transport vehicle has three Φ80mm pin holes, which are connected to the bracket through pins. The main transport vehicle travels to the fixed crossbeam between the middle support leg and the tail support leg, and the auxiliary transport vehicle travels to the fixed crossbeam between the temporary support leg and the front support leg. The temporary support leg is retracted, and the hydraulic cylinders of the front support leg and the tail support leg are retracted to lower the main beam. The main transport vehicle and the auxiliary transport vehicle are connected to a pair of fixed crossbeam pins respectively. After aligning the pins, the connecting pins are driven in to connect with the bracket. The sleepers and other accessories are attached. In order to ensure the stability of the bridge erecting machine during transportation, a 1.8m long temporary support is welded to the end of the fixed crossbeam of the bridge erecting machine, and safety wheels are welded to the bottom of the channel steel.

[0043] Step 5: Retract the front outrigger cylinders and the tail outrigger cylinders, raise and retract the front and tail outriggers, and the transport vehicle and the transport auxiliary vehicle will move synchronously to the predetermined position.

[0044] In the above technical solution, the present invention hoists, assembles, and transports the various components of the bridge erecting machine, which is a comprehensive transfer construction method. The front support leg, middle support leg, tail support leg and temporary support leg cooperate with each other. The main transport vehicle and the auxiliary transport vehicle are connected to the main beam pin shaft and transported, which improves the transfer efficiency and ensures the stability of the bridge erecting machine during transportation.

[0045] In another technical solution, the process of lowering the main beam includes:

[0046] Step 5: The main transport vehicle and the auxiliary transport vehicle move synchronously to the bridgehead position so that the temporary outriggers are positioned above the pier cap;

[0047] Step 6: Disconnect the pin connections between the main transport vehicle, the auxiliary transport vehicle, and the pair of fixed crossbeams; extend the front outrigger cylinders and the rear outrigger cylinders to raise the main beam until the pair of fixed crossbeams are detached from the main transport vehicle and the auxiliary transport vehicle; install temporary outriggers between the front end of the main beam and the platform cap and support them in place.

[0048] Step 7: The main transport vehicle and the auxiliary transport vehicle drive away, and a pair of fixed crossbeams are disassembled and removed;

[0049] Step 8: Retract the front outrigger cylinder to raise and retract the front outrigger, so that the front outrigger stops at the front end of the main beam. Install the front outrigger between the front end of the main beam and the pier and support it in place. Install the middle outrigger and support it in place.

[0050] In the above technical solution, the present invention, through the cooperation of the main transport vehicle and the auxiliary transport vehicle, enables the main beam to be transported to the designated location, lowered, and supported on the bridge pier. The bridge erecting machine does not need to be disassembled and reassembled, ensuring the stability of the support, improving the efficiency of bridge construction operations, reducing construction costs, and eliminating the need for repeated disassembly and assembly. It has good promotion and application value.

[0051] In another technical solution, the process of the main beam passing through the hole includes:

[0052] Step 9: Install the longitudinal rails and the transverse rails on the next span pier. Each transverse rail is connected by a pin. Use sleepers to support the rails during assembly.

[0053] Step 10: Extend the front outrigger cylinder and the tail outrigger cylinder to raise the main beam to more than 1.5m off the ground and stop the middle outrigger at 1 / 2. If the bridge has a large slope, it can be moved forward in several steps. Retract the front outrigger cylinder and the tail outrigger cylinder and support them in place so that the middle outrigger is supported in place and ready to pass through the hole.

[0054] Step 11: The crane trolley moves to the rear end of the main beam, and the transport trolley and transport auxiliary vehicle transport the box girder and drive to the bottom of the main beam simultaneously. The box girder is attached to the crane trolley as a counterweight, and it must be firmly supported from behind using hoists and rigid supports.

[0055] Step 12: Before crossing the span, remove the bolts of the anti-roller pressure plate, clamp the transverse rail with rail clamps, and use four 5t hand-operated hoists to hang in the lifting lug holes at both ends of the support leg crossbeam. After tightening, prepare to cross the span. Make the front support leg, middle support leg and main beam slide connected, and the tail support leg slide connected to the longitudinal rail. Start the drive assembly to move the main beam forward and at the same time move the crane trolley backward. Make the crane trolley stationary relative to the counterweight sub-assembly composed of the transport main car, transport auxiliary car and box girder until the main beam moves forward to the temporary support leg above the cap of the next span pier.

[0056] Step 13: Remove the counterweight box girder, install temporary outriggers between the front end of the main girder and the cap of the next span pier and support them in place, install the tail outriggers and support them in place, retract the front outrigger cylinders, lift and retract the front outriggers so that the front outriggers stop at the front end of the main girder, install the front outriggers on the transverse track of the next span pier and support them in place, stop the middle outriggers at 3 / 4 of the main girder and support them in place, and retract the temporary outriggers.

[0057] In the above technical solution, the present invention ensures that the main beam achieves self-weight counterweight during the process of passing through the span by cooperating with the main transport vehicle and the auxiliary transport vehicle, thus meeting the counterweight construction requirements. This greatly reduces the safety factors caused by insufficient load of a single transport vehicle, further improves the utilization rate of the main transport vehicle and the auxiliary transport vehicle, and enhances the safety of the bridge erecting machine.

[0058] In another technical solution, the main transport vehicle and auxiliary transport vehicle transporting the main beam in steps four to seven include:

[0059] The vehicle body has a load-bearing plate as its load-bearing surface, which is used to transport main beams or box beams.

[0060] A pair of extension plates are symmetrically arranged on both sides of the vehicle body. The extension plates are rotatably connected to the vehicle body through a first hinge shaft. When no external force is applied, the pair of extension plates fall naturally to form a certain angle.

[0061] A pair of support plates, including a fixed plate and a rotating plate connected by a second hinge shaft. When no external force is applied, the rotating plate falls naturally to form a certain angle. The fixed plate is installed below the load-bearing plate, and the rotating plate is located below the vehicle body and the load-bearing plate and supports the first hinge shaft. The two plates fall in a staggered manner.

[0062] Several reinforcing ribs are obliquely disposed between the column of the vehicle body and the rotating plate of the support plate. Each reinforcing rib includes a corbel section and a diagonal brace section. The corbel section is obliquely disposed on the column of the vehicle body and serves as a fixed reinforcing structure. The lower end of the diagonal brace section is movably connected to the corbel section. The corbel section may be provided with a U-shaped extension section to restrict the diagonal brace section from tilting upward and to provide a movable connection. The upper end of the diagonal brace section is hinged to the rotating plate. The joint between the diagonal brace section and the corbel section is located below the fixed plate. When the diagonal brace section is installed in place, it supports the rotating plate and the extension plate. When the diagonal brace section is disconnected, the rotating plate and the extension plate fall down in sequence without increasing the width of the vehicle body.

[0063] The transport main vehicle and transport auxiliary vehicle in steps eleven and twelve include the vehicle body and the transport box girder.

[0064] In the above technical solution, the conventional main beam transportation and beam unloading process requires widening and reinforcing the vehicle body. When the main beam passes through the hole, the box girder counterweight needs to be transported, which can be achieved by adding a main transport vehicle and a secondary transport vehicle to support the box girder. The width is expanded by setting extension plates, and the reinforcement is strengthened by setting support plates and reinforcing ribs. The position and state of the extension plates can be easily switched by hinge shafts and other hinge methods to quickly carry out different transportation operations.

[0065] This application considers the overturning moment and the stabilizing moment caused by the sliding force of the main transport vehicle, auxiliary transport vehicle, and bridge erecting machine under their combined self-weight when traveling on an extreme 5% cross slope roadbed. The calculations are as follows: Figure 1 As shown. When the main transport vehicle and auxiliary transport vehicle are moving slowly, the entire bridge erecting machine may overturn along the inner wheel edge. Taking the moment of all forces about the inner wheel, we have the following formula:

[0066] Take the moment at point O on the outer wheel edge: M 外轮 =F γ2 ×L1

[0067] The moment of the beam transport vehicle about point O on the inner wheel side: Vertical M 运1 =G 运 cosα×L 运竖 Along the slope towards M 运2 =G 运 sinα×L transverse motion

[0068] The bridge erecting machine takes the moment about point O on the inner wheel side: vertical M 架1 =G 架 cosα×L 架 Along the slope towards M 架2 =G 架 sinα×L 架 Total overturning moment: Moment M 总倾 =M 外轮 +M 运2 +M架2

[0069] Total stable torque: torque M 总稳 =M 运1 +M 架1

[0070] In the extreme state, the outer wheel is in a critical state, and the outer wheel F γ2 =0,

[0071] Then we have: M 总倾 =M 外轮 +M 运2 +M 架2 =4.8×1480×0.05+180×0.75×0.05=362kN·m,

[0072] M 总稳 =M 运1 +M 架1 =1.2×1480*0.99+1.2×180×0.99=1660kN·m,

[0073] Stability coefficient λ = M 总稳 / M 总倾 =1660 / 362=4.5>1.5, the lateral stability meets the requirements.

[0074] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0075] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details shown and described herein.

Claims

1. A method for transporting a bridge erecting machine, characterized in that, include: Step 1: The hoisting and assembly of the main girder assembly, front outrigger assembly, middle outrigger assembly, tail outrigger assembly, temporary outrigger assembly, longitudinal gantry assembly, and crane trolley assembly of the bridge erecting machine, so that the temporary outrigger, front outrigger, middle outrigger, and tail outrigger are installed on the main girder in sequence. Step 2: Position the front outrigger and middle outrigger at 1 / 4 and 3 / 4 of the main beam respectively and support them in place. Install the tail outrigger at the rear end of the main beam and support it in place. Install a pair of fixed crossbeams between the temporary outrigger and the front outrigger, and between the middle outrigger and the tail outrigger respectively. Step 3: Extend the front outrigger cylinder and the tail outrigger cylinder to raise the main beam to more than 1.5 m off the ground, so that the temporary outriggers are in place, and then lift and retract the middle outriggers of the crane trolley. Step 4: The main transport vehicle travels to the fixed crossbeam between the middle and rear outriggers, and the auxiliary transport vehicle travels to the fixed crossbeam between the temporary and front outriggers. The temporary outriggers are retracted, and the cylinders of the front and rear outriggers are retracted to lower the main beam. The main transport vehicle and the auxiliary transport vehicle are then connected to a pair of fixed crossbeam pins. Step 5: Retract the front outrigger cylinders and the rear outrigger cylinders, raise and retract the front outriggers and the rear outriggers, and the transport vehicle and the transport auxiliary vehicle simultaneously move to the bridgehead position so that the temporary outriggers are above the platform cap. Step 6: Disconnect the pin connections between the main transport vehicle, the auxiliary transport vehicle, and the pair of fixed crossbeams; extend the front outrigger cylinders and the rear outrigger cylinders to raise the main beam until the pair of fixed crossbeams are detached from the main transport vehicle and the auxiliary transport vehicle; install temporary outriggers between the front end of the main beam and the platform cap and support them in place. Step 7: The main transport vehicle and the auxiliary transport vehicle drive away, and a pair of fixed crossbeams are disassembled and removed; Step 8: Retract the front outrigger cylinder to raise and retract the front outrigger, so that the front outrigger stops at the front end of the main beam. Install the front outrigger between the front end of the main beam and the pier and support it in place. Install the middle outrigger and support it in place. Step nine: Install the longitudinal rails and the transverse rails on the next span pier; Step 10: Extend the front outrigger cylinder and the tail outrigger cylinder to raise the main beam to more than 1.5 m off the ground, stop the middle outrigger at 1 / 2 position, retract the front outrigger cylinder and the tail outrigger cylinder and support them in place, and support the middle outrigger in place. Step 11: The crane trolley moves to the rear end of the main beam, and the transport trolley and transport auxiliary vehicle transport the box girder and drive to the bottom of the main beam simultaneously. The crane trolley is attached to the box girder as a counterweight. Step 12: Slide the front outrigger and middle outrigger to the main beam, and slide the tail outrigger to the longitudinal track. Start the drive assembly to move the main beam forward and at the same time move the crane trolley backward, so that the crane trolley is stationary relative to the counterweight sub-assembly composed of the transport trolley, transport auxiliary trolley and box girder, until the main beam moves forward to the point where the temporary outrigger is above the cap of the next span pier. Step 13: Remove the counterweight box girder, install temporary outriggers between the front end of the main girder and the cap of the next span pier and support them in place, install the tail outriggers and support them in place, retract the front outrigger cylinders, lift and retract the front outriggers so that the front outriggers stop at the front end of the main girder, install the front outriggers on the transverse track of the next span pier and support them in place, stop the middle outriggers at 3 / 4 of the main girder and support them in place, and retract the temporary outriggers.

2. The bridge erecting machine transportation method as described in claim 1, characterized in that, The main transport vehicle and auxiliary transport vehicle in steps four through seven include: The main body of the vehicle has a load-bearing plate as its load-bearing surface. A pair of extension plates are symmetrically arranged on both sides of the vehicle body, and the extension plates are rotatably connected to the vehicle body via a first hinge shaft; A pair of support plates, each including a fixed plate and a rotating plate connected by a second hinge shaft, wherein the fixed plate is mounted below the load-bearing plate and the rotating plate is located below the vehicle body and the load-bearing plate and supports the first hinge shaft; Several reinforcing ribs are inclinedly disposed between the column of the vehicle body and the rotating plate of the support plate. The reinforcing ribs include a bracket section and a diagonal brace section. The bracket section is inclinedly disposed on the column of the vehicle body. The lower end of the diagonal brace section is movably connected to the bracket section. The upper end of the diagonal brace section is hinged to the rotating plate. The joint between the diagonal brace section and the bracket section is located below the fixed plate.

3. The bridge erecting machine transportation method as described in claim 2, characterized in that, The transport main vehicle and transport auxiliary vehicle in steps eleven and twelve include the vehicle body.

4. The bridge erecting machine transportation method as described in claim 1, characterized in that, The support is secured by erecting sleepers and pads.

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