CN112575692A - Connecting rod type continuous pushing equipment - Google Patents
Connecting rod type continuous pushing equipment Download PDFInfo
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- CN112575692A CN112575692A CN202011453621.7A CN202011453621A CN112575692A CN 112575692 A CN112575692 A CN 112575692A CN 202011453621 A CN202011453621 A CN 202011453621A CN 112575692 A CN112575692 A CN 112575692A
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- connecting rod
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- pushing
- steering device
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/06—Methods or apparatus specially adapted for erecting or assembling bridges by translational movement of the bridge or bridge sections
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention relates to connecting rod type continuous pushing equipment which is used for pushing a component, and comprises a rotary module and a steering module, wherein the steering module comprises a rotary equipment steering device and a component steering device; the rotary module comprises a loading oil cylinder, a first connecting rod, a second connecting rod and a rubber hanging wheel, one end of the first connecting rod is hinged with the rotary equipment steering device, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is hinged with the rubber hanging wheel, the fixed end of the loading oil cylinder is hinged with the rotary equipment steering device, and the output end of the loading oil cylinder is hinged with the middle part of the second connecting rod; the rubber hanging wheel is also provided with a rotary driving device. Compared with the prior art, the invention can realize continuous pushing drive; the pushing direction of the component can be adjusted rapidly in a large angle; the friction resistance is small, and the abrasion is less; simple operation, high automation degree and the like.
Description
Technical Field
The invention relates to the technical field of pushing construction, in particular to connecting rod type continuous pushing equipment.
Background
The top pushing construction method is one of the most common and important methods in bridge construction, and has the outstanding characteristics of rapidness, high quality, safety and economy. At present, domestic equipment for pushing construction mainly adopts pull type pushing equipment dragged by a steel strand and walking type pushing equipment driven by a hydraulic oil cylinder. The dragging type pushing equipment drags the steel strand by adopting a hydraulic jack arranged on the pier so as to drag the box girder to slide on the preset track; the walking type pushing equipment adopts two sets of pushing oil cylinders to complete four actions of jacking, pushing, descending and retracting of the box girder, the four actions are circularly and repeatedly used for realizing the pushing of the box girder, the jacking oil cylinders arranged on the supporting platform stretch to complete the jacking action and the descending action of the box girder, and the pushing translation oil cylinders arranged on the base stretch to complete the pushing action and the retracting action of the box girder.
The invention with publication number CN202672047U discloses a walking type pushing device, which is provided with a plurality of longitudinally arranged jacking jacks and horizontally arranged translation jacks, the jacking jacks are driven by a high-pressure oil pump of a hydraulic system to jack a supporting beam to lift a box girder away from a supporting surface, then the translation jacks are driven to push the whole jacking mechanism to slide forwards, then the jacking jacks are slowly lowered to place the box girder on the supporting surface, finally the translation jacks are recovered in an idle load mode to drag the jacking mechanism back to the original position, and the reciprocating circulation is performed to realize the walking type pushing.
The invention with the publication number of CN107151980A discloses a lifting self-propelled continuous pushing system for a long-span steel box girder, which uses two parallel pushing jacks as a driving system for pushing and sliding, when the two pushing jacks supply oil, the rear ends and the dragging seats of the pushing jacks are locked, and the pushing jacks generate thrust to push the box girder to slide forwards; when the two pushing jacks return oil, the rear ends of the pushing jacks and the dragging seat are released, the pushing jacks generate dragging force to pull the rear ends of the pushing jacks and the pushing dragging seat to move forwards to the next position, and the continuous pushing of intermittent driving is realized through reciprocating and circulating actions.
The two schemes are all that a stroke formed by four actions of jacking, pushing, descending and retracting is realized through the stretching of the hydraulic oil cylinder, the pushing is completed in a circulating reciprocating manner, and the two schemes have two working defects:
1. in one stroke, only when the oil supply and extension of the pushing oil cylinder realize pushing action, pushing driving force can be provided to push the component forwards, and the rest actions are auxiliary actions and cannot provide pushing driving force, so that only intermittent driving of the component can be realized;
2. when the direction of the component needs to be adjusted, the component does not have the capability of adjusting the pushing direction.
Disclosure of Invention
The invention aims to provide a connecting rod type continuous pushing device for overcoming the defects that the prior art only can realize the intermittent driving of a component and does not have the capability of adjusting the pushing direction.
The purpose of the invention can be realized by the following technical scheme:
a connecting rod type continuous pushing device is used for pushing a component and comprises a rotary module and a steering module, wherein the steering module comprises a rotary device steering device and a component steering device;
the rotary module comprises a loading oil cylinder, a first connecting rod, a second connecting rod and a rubber hanging wheel, one end of the first connecting rod is hinged with the rotary equipment steering device, the other end of the first connecting rod is hinged with one end of the second connecting rod, the other end of the second connecting rod is hinged with the rubber hanging wheel, the fixed end of the loading oil cylinder is hinged with the rotary equipment steering device, and the output end of the loading oil cylinder is hinged with the middle part of the second connecting rod; the rubber hanging wheel is also provided with a rotary driving device.
When the rubber hanging wheel is used, the loading oil cylinder extends to drive the first connecting rod and the second connecting rod to rotate, so that the rubber hanging wheel is driven to move upwards to be in contact with a component, and the loading action is finished; after the loading action is finished, the rotary driving device rotates to drive the rubber hanging wheel in contact with the component to rotate, and the contact surface of the rubber hanging wheel and the component generates a forward pushing friction force, so that the component is driven to push forwards to finish the rotary pushing action; the component steering device rotates to drive the carrier roller supporting mechanism to rotate, so that the component steering is realized, the rotating equipment steering device rotates to drive the rotating module to rotate, the driving direction of the jacking force of the rotating module is adjusted, and the steering action is completed.
Further, the rotary driving device is fixedly connected with the glue hanging wheel through a first screw group, and the first screw group comprises a plurality of screws.
Furthermore, the first screw group comprises six hexagon screws, and the six hexagon screws are uniformly arranged on an outer circle which takes the center of the rubber hanging wheel as the circle center.
Further, the idler support mechanism is fixedly connected with the component steering device through a second screw set, and the second screw set comprises a plurality of screws.
Further, the second screw group includes six hexagonal screws, and the six hexagonal screws are uniformly arranged on an outer circle having a rotation center of the component steering apparatus as a center.
Further, the number of the combination of the rotary module and the rotary equipment steering device is a plurality, the combination is installed on two sides of a pier body of a pier, and the component steering device is installed on the top end of the pier body.
Furthermore, the loading oil cylinder adopts a hydraulic oil cylinder.
Further, the slewing device steering device and the component steering device both adopt hydraulic motors as power elements.
Further, the slewing drive device adopts a hydraulic motor and a wheel reduction gear which are combined to be used as a power element.
Furthermore, the hinged connection modes are all connected through hinges, and the hinges are all stainless steel hinges.
Compared with the prior art, the invention has the following advantages:
(1) can realize continuous pushing drive: the rotary driving device driven by the hydraulic motor and the wheel-side reducer provides continuous rotary driving force and torque for the rubber coating wheel, so that continuous friction driving force is provided for forward pushing of the component, and the component can be continuously pushed forward.
(2) The pushing direction of the component can be adjusted rapidly in a large angle: the invention drives the component to turn through the rotation of the component turning device, and rotates the rotary equipment through the rotary equipment turning device to adjust the direction of the friction driving force, so that the pushing direction of the whole set of connecting rod type continuous pushing equipment is changed.
(3) The friction resistance is small, and the wearing and tearing are few: in the invention, the rubber hanging wheel and the roller of the carrier roller supporting mechanism are in contact with the member, so that the friction force borne by the member in the pushing process is rolling friction force, and compared with the sliding friction force generated by the walking type pushing device through surface contact support, the rubber hanging wheel and the member and the roller and the member are in line contact, the contact area is small, and the rolling friction resistance is small, so that the member, the roller and the rubber hanging wheel are less worn in the pushing process.
(4) The operation is simple, and the automation degree is high: the invention can continuously push the component and adjust the component pushing direction, does not need manual operation in the pushing process and the component pushing direction adjusting process, and can realize continuous pushing and adjustment of the component pushing direction only by controlling the working states of the loading oil cylinder, the hydraulic motor of the steering device of the rotary equipment and the hydraulic motor of the rotary driving device through the electro-hydraulic control system.
Drawings
FIG. 1 is a schematic structural diagram of a link-type continuous pushing apparatus according to an embodiment of the present invention;
in the figure, the hydraulic support device comprises a loading oil cylinder 1, a rotary equipment steering device 2, a first connecting rod 3, a second connecting rod 4, a rubber hanging wheel 5, a component steering device 6, a carrier roller supporting mechanism 7, a rotary driving device 8, a component 9, a component 10 and a pier body.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
The embodiment provides connecting rod type continuous pushing equipment for pushing a component, which comprises a rotary module and a steering module, wherein the steering module comprises a rotary equipment steering device 2 and a component steering device 6, the rotary module is installed on the rotary equipment steering device 2, and a carrier roller supporting mechanism 7 is installed on the component steering device 6 and used for supporting the component;
the rotary module comprises a loading oil cylinder 1, a first connecting rod 3, a second connecting rod 4 and a rubber hanging wheel 5, one end of the first connecting rod 3 is hinged with the rotary equipment steering device 2, the other end of the first connecting rod 3 is hinged with one end of the second connecting rod 4, the other end of the second connecting rod 4 is hinged with the rubber hanging wheel 5, the fixed end of the loading oil cylinder 1 is hinged with the rotary equipment steering device 2, and the output end of the loading oil cylinder is hinged with the middle part of the second connecting rod 4; the rubber hanging wheel 5 is also provided with a rotary driving device 8.
When the device is used, the loading oil cylinder 1 extends to drive the first connecting rod 3 and the second connecting rod 4 to rotate, so that the rubber hanging wheel 5 is driven to move upwards to be in contact with a component, and the loading action is finished; after the loading action is finished, the rotary driving device 8 rotates to drive the rubber hanging wheel 5 in contact with the component to rotate, and the contact surface of the rubber hanging wheel and the component generates a forward pushing friction force, so that the component is driven to push forwards to finish the rotary pushing action; the component steering device 6 rotates to drive the carrier roller supporting mechanism 7 to rotate, so that the component steering is realized, the rotating device 2 rotates to drive the rotating module to rotate, the driving direction of the pushing force of the rotating module is adjusted, and the steering action is completed.
In a preferred embodiment, the rotary drive 8 is fixedly connected to the applicator wheel 5 by a first screw set, which comprises a plurality of screws.
Further, as a preferred embodiment, the first screw group comprises six hexagonal screws, and the six hexagonal screws are uniformly arranged on an outer circle taking the center of the glue hanging wheel 5 as a circle center.
In a preferred embodiment, the idler support means 7 is fixedly connected to the component deflection device 6 by means of a second screw set, which comprises a plurality of screws.
In a preferred embodiment, the second set of screws comprises six hexagonal screws, which are uniformly arranged on an outer circle centered on the center of rotation of the component steering device 6.
As a preferred embodiment, the number of the combination of the swing module and the swing equipment turning device 2 is plural, and the combination is installed at both sides of the pier body 10 of the pier, and the member turning device 6 is installed at the top end of the pier body 10.
As a preferred embodiment, the loading cylinder 1 is a hydraulic cylinder.
As a preferred embodiment, the swing equipment steering apparatus 2 and the member steering apparatus 6 each employ a hydraulic motor as a power element.
In a preferred embodiment, the slewing drive device 8 uses a hydraulic motor in combination with a wheel reduction gear as a power element.
In a preferred embodiment, the hinged connection is realized through hinges, and the hinges are stainless steel hinges.
A combination of the above preferred embodiments can provide an optimal embodiment, which will be described in detail below.
The connecting rod type continuous pushing equipment of the embodiment comprises a loading oil cylinder 1, a rotary equipment steering device 2, a first connecting rod 3, a second connecting rod 4, a rubber coating wheel 5, a component steering device 6, a carrier roller supporting mechanism 7, a rotary driving device 8, a component 9 and a pier body 10.
The loading oil cylinder 1 is connected to the position, close to the right, of the middle part of the upper surface of the steering device 2 of the rotary equipment through a first hinge and is hinged with the middle section of the second connecting rod 4 through a second hinge, so that the loading oil cylinder 1 can rotate within a small angle for loading, and positive pressure is generated between the rubber hanging wheel 5 and the component 9; the first connecting rod 3 is connected to the central position of the upper surface of the steering device 2 of the slewing equipment through a third hinge and is hinged with the left end of the second connecting rod 4 through a fourth hinge; the right end of the second connecting rod 4 is hinged with the center of the rubber hanging wheel 5 through a fifth hinge; the rotary driving device 8 is tightly connected with the rubber hanging wheel 5 through six uniformly distributed hexagon socket head cap screws and is used for providing driving force for the rotation of the rubber hanging wheel 5; the carrier roller supporting mechanism 7 is tightly connected with the component steering device 6 through six uniformly distributed hexagon socket head cap screws and is used for adjusting the direction of the component.
The loading oil cylinder 1 adopts a hydraulic oil cylinder; the steering device 2 of the rotary equipment adopts a hydraulic motor as a power element; the component steering device 6 adopts a hydraulic motor as a power element; the rotary driving device 8 adopts a hydraulic motor and a wheel reduction gear which are combined to be used as a power element; the first screw group and the second screw group respectively comprise 6 hexagon socket head cap screws which are uniformly arranged; the first hinge, the second hinge, the third hinge, the fourth hinge and the fifth hinge are all stainless steel hinges. The turning device 2, the member turning device 6, the carrier roller supporting mechanism 7 and the turning driving device 8 of the turning equipment can be realized by adopting the prior art, do not relate to the key point of the invention and are not described in detail.
When the device is applied, four sets of driving devices consisting of a loading oil cylinder 1, a rotary device steering device 2, a first connecting rod 3, a second connecting rod 4, a rubber hanging wheel 5 and a rotary driving device 8 are adopted, and two sets of devices are respectively arranged in front and at the back to provide enough pushing force. The component steering device 6 of the invention is arranged on the top of the pier body 10, and the rotating equipment steering devices 2 of four sets of equipment are arranged on the pier body 10. The slewing device steering device 2 and the component steering device 6 adopt a hydraulic motor to provide driving force, and the slewing driving device 8 adopts a method of combining the hydraulic motor and a wheel reduction gear to provide driving force. The loading force of the loading oil cylinders in the four sets of equipment, the torque and the rotating speed of the hydraulic motor are cooperatively controlled by the electro-hydraulic controller, so that the forward pushing of the components is ensured.
The working principle of the connecting rod type continuous pushing equipment is as follows:
1. the pushing direction of the member is adjusted. The steering equipment consists of a rotary equipment steering device 2, a component steering device 6 and a carrier roller supporting mechanism 7, is used for steering the rotary equipment and steering a component so as to adjust the pushing driving force and the pushing direction of the component, and comprises the following specific processes: a hydraulic motor of the component steering device 6 rotates to drive the carrier roller supporting mechanism 7 to rotate so as to drive the component 9 to steer; the turning device 2 of the four sets of equipment rotates simultaneously to drive the turning equipment consisting of the loading oil cylinder 1, the first connecting rod 3, the second connecting rod 4, the rubber hanging wheel 5 and the turning driving device 8 to rotate to the pushing direction, and the adjustment of the pushing direction of the friction driving force is completed synchronously.
2. Continuously pushing the member. Constitute rotary equipment by loading cylinder 1, first connecting rod 3, second connecting rod 4, rubber hanging wheel 5, gyration drive arrangement 8 for provide the required drive power of component top pushing, the concrete process is: the loading oil cylinders 1 of the four sets of equipment synchronously extend cylinders, the second connecting rod 4 rotates and the first connecting rod 3 rotates, the rubber hanging wheel 5 connected with the second connecting rod 4 moves upwards and is finally pressed on the surface of the component 9, and positive pressure is generated on the contact surface of the rubber hanging wheel 5 and the component 9; the rotary driving device 8 drives the rubber hanging wheel 5 to rotate, so that the rubber hanging wheel 5 and the member 9 generate relative motion, and because positive pressure exists between the rubber hanging wheel 5 and the member 9, friction force is generated on the contact surface of the member 9 and the rubber hanging wheel 5, and the member is continuously pushed forwards by the driving force of friction.
The specific working process is as follows:
arranging four sets of driving equipment consisting of a loading oil cylinder 1, a rotary equipment steering device 2, a first connecting rod 3, a second connecting rod 4, a rubber-coated wheel 5 and a rotary driving device 8 on a pier 10, fastening and connecting the rotary equipment steering devices 2 of the four sets of equipment with the pier body 10 through hexagon socket head cap screws, and fastening and connecting a component steering device 6 with the top of the pier body 10 through the hexagon socket head cap screws.
And (3) building a hydraulic system, controlling the loading oil cylinder 1, the rotary equipment steering device 2 and the hydraulic motor of the rotary driving device 8 of the four sets of equipment, and controlling the hydraulic motor of the component steering device 6 to provide driving force for the rotary equipment and the steering equipment.
Hoisting the component 9 and placing the component on the carrier roller supporting mechanism 7; the four sets of equipment loading oil cylinders synchronously extend 1 to enable the second connecting rod 4 and the first connecting rod 3 to rotate simultaneously, the rubber hanging wheel 5 hinged with the second connecting rod 4 moves upwards until the surface of the rubber hanging wheel 5 is contacted with the surface of a component, loading is continued, and pressure is gradually loaded between the rubber hanging wheel 5 and the component 9; the four sets of equipment rotation driving devices 8 synchronously rotate to drive the rubber hanging wheel 5 to rotate and provide a friction driving force for pushing the component 9 forwards;
when the direction of the component needs to be adjusted, the loading oil cylinders 1 of the four sets of equipment contract, the rubber hanging wheel 5 is separated from the component 9, and the hydraulic motor of the component steering device 6 rotates to drive the component 9 to steer; the turning device 2 of the four sets of equipment rotates to drive the turning equipment to rotate to the top pushing direction;
the loading oil cylinders 1 of the four sets of equipment synchronously extend to enable the rubber coating wheel 5 to be in contact with the component 9 and gradually load pressure between the rubber coating wheel 5 and the component 9; the rotation driving devices 8 of the four sets of equipment synchronously rotate to drive the rubber hanging wheel 5 to rotate, and provide a friction driving force for pushing forward for the component 9; the rotary driving device 8 is continuously driven, the rubber hanging wheel 5 continuously rotates, and the component 9 is continuously pushed forwards by continuous friction driving force.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The connecting rod type continuous pushing equipment is used for pushing a component and is characterized by comprising a rotary module and a steering module, wherein the steering module comprises a rotary equipment steering device (2) and a component steering device (6), the rotary module is installed on the rotary equipment steering device (2), and a carrier roller supporting mechanism (7) is installed on the component steering device (6) and used for supporting the component;
the rotary module comprises a loading oil cylinder (1), a first connecting rod (3), a second connecting rod (4) and a rubber hanging wheel (5), one end of the first connecting rod (3) is hinged with the rotary equipment steering device (2), the other end of the first connecting rod is hinged with one end of the second connecting rod (4), the other end of the second connecting rod (4) is hinged with the rubber hanging wheel (5), the fixed end of the loading oil cylinder (1) is hinged with the rotary equipment steering device (2), and the output end of the loading oil cylinder is hinged with the middle part of the second connecting rod (4); the rubber hanging wheel (5) is also provided with a rotary driving device (8);
when the device is used, the cylinder is extended through the loading oil cylinder (1) to drive the first connecting rod (3) and the second connecting rod (4) to rotate, so that the rubber hanging wheel (5) is driven to move upwards to be in contact with a component, and the loading action is completed; after the loading action is finished, the rotary driving device (8) rotates to drive the rubber hanging wheel (5) contacted with the component to rotate, and the contact surface of the rubber hanging wheel and the component generates a forward pushing friction force, so that the component is driven to push forwards to finish the rotary pushing action; the component steering device (6) rotates to drive the carrier roller supporting mechanism (7) to rotate, so that the component steering is realized, the rotating device steering device (2) rotates to drive the rotating module to rotate, the driving direction of the pushing force of the rotating module is adjusted, and the steering action is completed.
2. The link-type continuous pushing apparatus as claimed in claim 1, wherein said rotary driving device (8) is fixedly connected to said rubber-coated wheel (5) by a first screw set, said first screw set comprising a plurality of screws.
3. The connecting rod type continuous pushing equipment as recited in claim 2, wherein the first screw group comprises six hexagonal screws, and the six hexagonal screws are uniformly arranged on an outer circle with the center of the rubber hanging wheel (5) as a circle center.
4. The link-type continuous pushing apparatus as claimed in claim 1, wherein said idler support mechanism (7) is fixedly connected to said member turning device (6) by means of a second screw set, said second screw set comprising a plurality of screws.
5. The link-type continuous pushing apparatus as claimed in claim 4, wherein said second screw set comprises six hex screws, and said six hex screws are uniformly arranged on an outer circle centered on the rotation center of said member turning device (6).
6. The link type continuous pushing apparatus as claimed in claim 1, wherein the number of the combination of the rotating module and the rotating apparatus steering device (2) is plural, and the combination is installed at both sides of a pier body (10) of a bridge pier, and the member steering device (6) is installed at the top end of the pier body (10).
7. The link type continuous pushing equipment as claimed in claim 1, wherein the loading cylinder (1) is a hydraulic cylinder.
8. The link-type continuous pushing apparatus as claimed in claim 1, wherein said rotating apparatus steering device (2) and said component steering device (6) both use hydraulic motors as power elements.
9. The link-type continuous pushing apparatus as claimed in claim 1, wherein said rotary driving device (8) employs a hydraulic motor and a wheel reduction gear as a power element.
10. The connecting rod type continuous pushing equipment as claimed in claim 1, wherein the hinged connection is formed by hinges made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011453621.7A CN112575692B (en) | 2020-12-12 | 2020-12-12 | Connecting rod type continuous pushing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011453621.7A CN112575692B (en) | 2020-12-12 | 2020-12-12 | Connecting rod type continuous pushing equipment |
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| Publication Number | Publication Date |
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| CN112575692A true CN112575692A (en) | 2021-03-30 |
| CN112575692B CN112575692B (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011453621.7A Active CN112575692B (en) | 2020-12-12 | 2020-12-12 | Connecting rod type continuous pushing equipment |
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| CN (1) | CN112575692B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113481874A (en) * | 2021-08-05 | 2021-10-08 | 中铁四局集团有限公司 | Construction method for automatic roller type steel buttress wheel set structure pushing steel box girder |
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| CN111893901A (en) * | 2020-08-07 | 2020-11-06 | 华东交通大学 | Bridge rotation construction device |
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| JP2000282413A (en) * | 1999-03-31 | 2000-10-10 | Sumitomo Heavy Ind Ltd | Launching machine with deflection eliminator |
| JP2009024464A (en) * | 2007-07-24 | 2009-02-05 | Nippon Sharyo Seizo Kaisha Ltd | Delivery truck |
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| CN113481874A (en) * | 2021-08-05 | 2021-10-08 | 中铁四局集团有限公司 | Construction method for automatic roller type steel buttress wheel set structure pushing steel box girder |
| CN113481874B (en) * | 2021-08-05 | 2023-11-03 | 中铁四局集团有限公司 | Construction method for pushing steel box girder by automatic roller type steel buttress wheel set structure |
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