Small box girder support structure and construction method for assembled bridge

Abstract

The present application relates to a small box girder support structure for an assembled bridge, comprising a beam frame, the beam frame being arranged horizontally, a plurality of slides being slidably arranged on the beam frame along the length direction of the beam frame, each of the slides being provided with a first driving assembly for driving the slide to slide on the beam frame, and each of the slides being provided with a hoisting assembly for hoisting the small box girder; a first supporting arm and a second supporting arm being slidably arranged on each of the slides, the first supporting arm and the second supporting arm being adapted to the side walls of the small box girder, a supporting platform for supporting the small box girder being fixedly arranged on the first supporting arm and the second supporting arm, and a second driving assembly being provided on the slide for driving the first supporting arm and the second supporting arm to slide in a direction toward or away from each other. The present application has the effect of shortening the construction period when assembling and fixing the box girder.

Description

Technical Field

[0001] The present application relates to the technical field of prefabricated bridges, and in particular to a small box girder support structure and a construction method for prefabricated bridges. Background Art

[0002] An assembled bridge is a type of bridge that is made by processing the bridge's substructure and upper structure, such as components such as T-beams, T-beams, etc., in a prefabricated component factory based on BIM technology, and then transporting them to the construction site for hoisting and splicing. In recent years, in the construction of transportation infrastructure, in order to practice the concept of green and sustainable development, minimize the interference of urban bridge construction on road traffic and citizens' lives, and reduce pollution to the urban and atmospheric environment, assembled bridges have been widely used due to their short construction period, low dust pollution, and low noise pollution.

[0003] At present, during the construction of the box girder of the prefabricated bridge, the lower components such as piers, abutments, and cap beams are first spliced ​​and fixed at the erection position of the bridge. Then, a gantry crane is erected at the construction position of the bridge, and the box girder is lifted to the installation position in sequence by the gantry crane. The box girder and the cap beam or other box beams are temporarily fixed by means of devices, and then steel bars are inserted into the holes processed in the prefabrication production process, and grouting is used to make the concrete fully fill the gaps between the box girder and the cap beam and between the box beams, thus completing the assembly and fixation of the box girder.

[0004] However, when assembling and fixing the box girder with the cap beam or other box girders, in order to avoid the influence of the subsequently installed box girder on the internal stress of the already installed box girder, it is generally necessary to wait until the concrete is completely solidified before installing and fixing the subsequent box girder, which greatly increases the construction period. Summary of the Invention

[0005] In order to shorten the construction period when assembling and fixing the box girder, the present application provides a small box girder support structure and a construction method for an assembled bridge.

[0006] In the first aspect, the present application provides a small box girder support structure for an assembled bridge, which adopts the following technical solution:

[0007] A small box girder support structure for an assembled bridge comprises a beam frame, which is arranged horizontally. A plurality of slides are slidingly arranged on the beam frame along the length direction of the beam frame, each of the slides is provided with a first driving assembly for driving the slide to slide on the beam frame, and each of the slides is provided with a lifting assembly for lifting the small box girder; a first support arm and a second support arm are slidingly provided on each of the slides, the first support arm and the second support arm are both adapted to the side walls of the small box girder, and a support platform for supporting the small box girder is fixedly provided on the first support arm and the second support arm, and a second driving assembly is provided on the slide for driving the first support arm and the second support arm to slide in a direction approaching or moving away from each other.

[0008] By adopting the above technical solution, when assembling and fixing the small box girder, the small box girder is lifted to the installation position by the lifting assembly, and the small box girder is located above the two support platforms, the first support arm and the second support arm are driven to approach each other by the second drive assembly, the small box girder is placed between the first support arm and the second support arm, the small box girder is supported by the two support platforms, and the small box girder is adjusted by the first support arm and the second support arm, after which the first drive assembly drives the slide to drive the small box girder to dock with the installed small box girder or cap beam, and steel bars are inserted into the holes processed in the prefabrication production process, and grouting is used to fix the small box girder to the installed small box girder or cap beam, after which the subsequent small box girder assembly and fixation can be continued. When assembling and fixing the small box girder between the installed small box girders, there is no need to wait for the concrete to completely solidify before installing and fixing the subsequent box girder, thereby greatly shortening the construction period of the small box girder installation, and to a certain extent reducing the pollution time to the surrounding environment and reducing energy consumption.

[0009] Optionally, the first drive assembly includes a gear hob and a first motor, a rack is fixedly mounted on the beam, the length direction of the rack is parallel to the length direction of the beam, the gear hob is rotatably mounted on a slide and engages with the rack, the first motor is fixedly mounted on the slide, and the output shaft of the first motor is coaxially fixedly connected to the gear hob.

[0010] By adopting the above technical solution, the first motor drives the gear hobbing to rotate, thereby driving the slide to slide on the beam frame. When the gear hobbing stops rotating, the gear hobbing engages with the rack, which can prevent the slide from sliding on the beam frame, thereby increasing the stability of the small box beam during installation.

[0011] Optionally, the lifting assembly includes a first winding wheel, a first pull rope, a first worm wheel, a first worm, a driving source and a hanging beam, the first winding wheel is rotatably set on a slide, the first pull rope is wound around the first winding wheel, the first worm wheel is coaxially fixedly connected to the first winding wheel, the first worm is rotatably set on the slide and meshes with the first worm wheel, the driving source is used to drive the first worm to rotate, the hanging beam is fixedly set at one end of the first pull rope away from the first winding wheel, and a plurality of hooks are provided on the hanging beam.

[0012] By adopting the above technical solution, the small box girder is hoisted on the lifting beam through the hook, the first worm is driven to rotate by the driving source, and the worm drives the worm wheel to drive the gear to rotate. By setting the first worm and the first worm wheel, the stability of the small box girder during hoisting is increased, and when the small box girder is hoisted, the driving source can be shut down, saving energy waste to a certain extent.

[0013] The transmission gear is fixedly mounted on the second gear and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the second ..., and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the second gear, and the transmission gear is engaged with the first gear and the second gear, and the transmission gear is engaged with the second gear, and the transmission gear

[0014] By adopting the above technical solution, the small box beam is usually adapted to the shape of the cap beam, and the cap beam needs to be installed on the pier from top to bottom through the setting of the lifting platform. When installing the cap beam, the cap beam is fixed on the lifting platform, and the driving member drives the mounting plate to slide toward the second gear, so that the transmission gear is disengaged from the first gear and engaged with the second gear. The second motor drives the transmission gear to rotate and drives the second gear to rotate. The second gear drives the second winding wheel to rotate, which can pull the lifting platform up and down to realize the installation of the cap beam and increase practicality. In addition, the cap beam is not easy to shake during installation, making the installation of the cap beam more convenient. When the small box beam is hoisted to a certain height, the support platforms on the first support arm and the second support arm are slid to the top of the small box beam, and then the lifting platform is driven to rise slowly, so that the support platform contacts the small box beam and supports the small box beam, thereby reducing the degree of collision between the support platform and the small box beam and reducing noise.

[0015] Optionally, a support plate is provided on the slide table for sliding along the sliding direction of the mounting plate, a sliding groove is provided on the support plate for sliding along the sliding direction of the mounting plate, a slider is fixedly provided on the mounting plate, the sliding block is slidingly provided in the sliding groove, a return spring is provided in the sliding groove and on both sides of the slider, one end of the return spring is fixedly connected to the bottom wall of the sliding groove, and the other end of the return spring is fixedly connected to the slider, and the driving member is used to drive the support plate to slide.

[0016] By adopting the above technical solution, the transmission gear will usually be inaccurately aligned when docking with the first gear or the second gear. The mounting plate is slidably set on the support plate. When the transmission gear is not accurately docked with the first gear or the second gear, the mounting plate slides a certain distance on the support plate and drives the transmission gear to rotate a certain angle. When the transmission gear is accurately aligned with the first gear, the mounting plate engages with the first gear or the second gear under the elastic force of the return spring. To a certain extent, the transmission gear will not rigidly collide with the first gear or the second gear and be damaged.

[0017] Optionally, the second drive assembly includes a bidirectional screw and a servo motor, the bidirectional screw is rotatably set on the lifting platform, the bidirectional screw is horizontally set, and the two ends of the bidirectional screw are respectively threadedly connected to the first support arm and the second support arm, the servo motor is fixedly set on the lifting platform, and the output shaft of the servo motor is coaxially fixedly connected to the bidirectional screw.

[0018] By adopting the above technical solution, the servo motor drives the bidirectional screw to rotate. While the bidirectional screw rotates, it can drive the first support arm and the second support arm to slide simultaneously in the direction of approaching or moving away from each other. When the bidirectional screw stops rotating, the first support arm and the second support arm can be limited.

[0019] Optionally, a plurality of rollers are rotatably provided at one end of the first support arm and the second support arm close to each other, the axes of the plurality of rollers are parallel, and the rollers are used for rolling connection with the small box beam.

[0020] By adopting the above technical solution, the position of the small box girder is easily shifted during hoisting, and when the small box girder is placed on the support platform, friction is easily generated between the small box girder and the first support arm or the second support arm. By setting the rollers, the small box girder and the rollers are connected in a rolling manner, thereby reducing the friction between the small box girder and the first support arm or the second support arm, and to a certain extent, preventing the wear of the small box girder, the first support arm or the second support arm.

[0021] In a second aspect, the present application provides a construction method for a small box girder support structure of an assembled bridge, which adopts the following technical solution:

[0022] A construction method for a small box girder support structure of an assembled bridge, comprising the following steps:

[0023] S1. Hoist the small box girder on the lifting beam and hoist the small box girder to a certain height so that the small box girder is located between the first support arm and the second support arm and above the support platform;

[0024] S2. Drive the first support arm and the second support arm toward each other, and drive the lifting platform to rise, place the small box girder on the support platforms of the first support arm and the second support arm, adjust the position of the small box girder by the first support arm and the second support arm, and drive the small box girder to the same horizontal height as the installed small box girder by the lifting platform;

[0025] S3, driving the slide to slide, driving the small box beam to dock with the installed small box beam or cap beam, inserting steel bars into the holes processed in the prefabrication production process, and using them for grouting;

[0026] S4. After the grouting is completed, proceed with the subsequent assembly and fixation of the small box beams.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Place the small box girder between the first support arm and the second support arm, support the small box girder through the two support platforms, and adjust the position of the small box girder through the first support arm and the second support arm. After that, the first drive component drives the slide to slide, drive the small box girder to dock with the installed small box girder or cap girder, insert steel bars into the holes processed in the prefabrication production process, and use grouting to fix the small box girder and the installed small box girder or cap girder. After that, the subsequent assembly and fixation of the small box girder can be continued. When assembling and fixing the small box girder between the installed small box girders, there is no need to wait for the concrete to completely solidify before installing and fixing the subsequent box girder, thereby greatly shortening the construction period of the small box girder installation, and to a certain extent reducing the pollution time of the surrounding environment and reducing energy consumption;

[0029] 2. After the small box girder is hoisted to a certain height, the support platforms on the first support arm and the second support arm are slid above the small box girder, and then the lifting platform is driven to rise slowly so that the support platform contacts the small box girder and supports the small box girder, thereby reducing the degree of collision between the support platform and the small box girder and reducing noise;

[0030] 3. When the transmission gear is docked with the first gear or the second gear, there is usually an inaccurate alignment. The mounting plate is slidably set on the support plate. When the transmission gear is not docked with the first gear or the second gear, the mounting plate slides a certain distance on the support plate and drives the transmission gear to rotate a certain angle. When the transmission gear is accurately aligned with the first gear, the mounting plate meshes with the first gear or the second gear under the elastic force of the return spring. To a certain extent, the transmission gear and the first gear or the second gear rigidly collide and are damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0032] Figure 2 This is a partial structural diagram of an embodiment of the present application, mainly used to illustrate the installation relationship between the slide and the beam;

[0033] Figure 3 yes Figure 2 Enlarged view of section A;

[0034] Figure 4 This is a partial structural diagram of an embodiment of the present application, mainly used to express the structural diagram of the lifting platform;

[0035] Figure 5 It is a partial structural diagram of an embodiment of the present application, mainly used to express the structural diagram of the slide;

[0036] Figure 6 It is a partial structural diagram of an embodiment of the present application, mainly used to express the structural diagram of the slide.

[0037] Explanation of reference numerals: 1. beam frame; 11. support frame; 12. slide rail; 13. rack rail; 2. slide table; 21. guide column; 211. telescopic rod; 22. transmission wheel shaft; 23. second winding wheel; 231. second pull rope; 232. second worm gear; 24. second worm; 241. second gear; 25. support plate; 26. driving member; 27. mounting plate; 28. return spring; 3. first driving assembly; 31. gear hobbing; 32. first motor; 4. lifting assembly; 41. First winding wheel; 42. First pull rope; 43. First worm gear; 44. First worm; 441. First gear; 45. Second motor; 451. Transmission gear; 46. Hanging beam; 461. Hook; 5. Lifting platform; 51. Mounting slot; 52. First mounting block; 521. First support arm; 53. Second mounting block; 531. Second support arm; 54. Support platform; 55. Roller; 6. Second drive assembly; 61. Bidirectional screw; 62. Servo motor. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-6This application is described in further detail.

[0039] The embodiment of the present application discloses a small box beam support structure for an assembled bridge. Figure 1 、 2 , including a beam frame 1, the beam frame 1 is arranged horizontally, and support frames 11 are arranged on both sides of the beam frame 1. During construction, the beam frame 1 is erected on the construction site through the support frames 11 on both sides of the beam frame 1. A plurality of slides 2 are arranged on the beam frame 1 for sliding along the length direction of the beam frame 1. Each slide 2 is provided with a first driving component 3 for driving the slide 2 to slide on the beam frame 1, and each slide 2 is also provided with a hoisting component 4 for hoisting a small box beam.

[0040] Reference Figure 2 、 3 , a slide rail 12 is fixedly provided on the beam 1 and on both sides of the slide 2, and the length direction of the slide rail 12 is parallel to the length direction of the beam 1, and a track groove is opened on both sides of the slide 2, and the two slide rails 12 are slidably arranged in the track groove respectively, and the cross-section of the slide rail 12 is T-shaped, and the track groove is adapted to the slide rail 12; the first driving assembly 3 includes a gear hobbing 31 and a first motor 32, and a rack rail 13 is fixedly provided on the beam 1, and the length direction of the rack rail 13 is parallel to the length direction of the beam 1, and the gear hobbing 31 is rotatably arranged on the slide 2 and meshes with the rack rail 13, and the first motor 32 is fixedly provided on the slide 2, and the output shaft of the first motor 32 is coaxially fixedly connected with the gear hobbing 31; the gear hobbing 31 is driven to rotate by the first motor 32, thereby driving the slide 2 to slide on the beam 1, and when the gear hobbing 31 stops rotating, the gear hobbing 31 is engaged with the rack rail 13, which can prevent the slide 2 from sliding on the beam 1, thereby increasing the stability of the small box beam during installation.

[0041] Reference Figure 2 、 4 A lifting platform 5 is provided on the bottom wall of the slide 2 for sliding in the vertical direction. The width of the lifting platform 5 is smaller than the width of the slide 2. Two guide pillars 21 are fixedly provided on the bottom wall of the slide 2. The length directions of the two guide pillars 21 are vertical. Guide grooves are provided on the bottom wall of the guide pillars 21 along the length direction of the guide pillars 21. Telescopic rods 211 are slidably provided in the guide grooves of the two guide pillars 21, and the telescopic rods 211 are fixedly connected to the lifting platform 5.

[0042] Reference Figure 2 、 4A mounting groove 51 is provided on the bottom wall of the two lifting platforms 5 along the length direction of the lifting platform 5, and a first mounting block 52 and a second mounting block 53 are slidably arranged in the mounting groove 51. The cross-sections of the first mounting block 52 and the second mounting block 53 are both T-shaped, and the mounting groove 51 is adapted to the first mounting block 52 and the second mounting block 53. A first supporting arm 521 is fixedly provided on the first mounting block 52, and a second supporting arm 531 is fixedly provided on the second mounting block 53. The first supporting arm 521 and the second supporting arm 531 are both adapted to the side walls of the small box beam, and a support platform 54 is fixedly provided at one end of the first supporting arm 521 and the second supporting arm 531 close to each other, and the top wall of the support platform 54 is arranged horizontally.

[0043] Reference Figure 4 The first support arm 521 and the second support arm 531 slide in the direction of approaching or moving away from each other. The second drive assembly 6 includes a bidirectional screw 61 and a servo motor 62. The bidirectional screw 61 is rotatably arranged in the mounting groove 51. The bidirectional screw 61 is horizontally arranged, and the length direction of the bidirectional screw 61 is parallel to the length direction of the lifting platform 5. A first threaded hole is opened on the first mounting block 52 along the length direction of the bidirectional screw 61, and a second threaded hole is opened on the second mounting block 53 along the length direction of the bidirectional screw 61. The two ends of the bidirectional screw 61 are respectively passed through the first threaded hole and the second threaded hole, and the bidirectional screw 61 is threadedly connected to the first mounting block 52 and the second mounting block 53 respectively. The servo motor 62 is fixedly arranged on the lifting platform 5, and the output shaft of the servo motor 62 is coaxially fixedly connected to the bidirectional screw 61.

[0044] Reference Figure 5 A plurality of rollers 55 are rotatably provided on one end of the first support arm 521 and the second support arm 531 close to each other. The plurality of rollers 55 are horizontally arranged, and the axial directions of the plurality of rollers 55 are parallel to the sliding direction of the slide 2.

[0045] Reference Figure 5The hoisting assembly 4 includes a first winding wheel 41, a first pull rope 42, a first worm gear 43, a first worm 44, a driving source and a hanging beam 46. The first winding wheel 41 is rotatably arranged on the top wall of the slide 2. A plurality of wheel grooves are provided on the first winding wheel 41. A first pull rope 42 is wound in each wheel groove. The first pull rope 42 is woven by winding multiple steel wires. A through hole is opened on the slide 2. A transmission wheel shaft 22 is rotatably arranged on the slide 2 and located in the through hole. The transmission wheel shaft 22 is connected to the first winding wheel 41 is parallel to the axis of the transmission wheel shaft 22, and a plurality of wire grooves are opened on the transmission wheel shaft 22 along the circumference of the transmission wheel shaft 22. Each first pull rope 42 passes around a wire groove respectively. The hanging beam 46 is fixedly set at one end of the first pull rope 42 away from the first winding wheel 41, and the hanging beam 46 is fixedly connected to the plurality of first pull ropes 42 at the same time. A plurality of hooks 461 are provided on the hanging beam 46; the first worm gear 43 is coaxially fixedly connected to the first winding wheel 41, and the first worm 44 is rotatably set on the slide 2 and meshes with the first worm gear 43.

[0046] Reference Figure 5 A second winding wheel 23 is rotatably provided on the slide 2, and the second winding wheel 23 is parallel to the rotation axis of the first winding wheel 41. A second pull rope 231 is wound around the second winding wheel 23, and the second pull rope 231 is fixedly connected to the lifting platform 5. A second worm gear 232 is coaxially fixed on the second winding wheel 23. A second worm 24 is also rotatably provided on the slide 2, and the second worm 24 is engaged with the second worm gear 232.

[0047] Reference Figure 5 、 6 A first gear 441 is coaxially fixed on the first worm 44, and a second gear 241 is coaxially fixed on the second worm 24. A support plate 25 is slidingly provided on the top wall of the slide 2 and between the first gear 441 and the second gear 241. The sliding direction of the support plate 25 is perpendicular to the axial direction of the first gear 441. A driving member 26 for driving the support plate 25 to slide is provided on the slide 2. The driving member 26 includes a rodless cylinder, which is fixed on the top wall of the slide 2. The length direction of the rodless cylinder is perpendicular to the axial direction of the first gear 441, and the piston of the rodless cylinder is fixedly connected to the support plate 25.

[0048] Reference Figure 6A slide groove is provided on the top wall of the support plate 25 along the length direction of the rodless cylinder, and a slider is slidingly arranged in the slide groove. The cross-section of the slider is T-shaped, and the slide groove is adapted to the slider. A mounting plate 27 is fixedly arranged on the slider, and the driving source includes a second motor 45. The second motor 45 is fixedly arranged on the mounting plate 27. A transmission gear 451 is coaxially fixed on the output shaft of the second motor 45, and the axial direction of the transmission gear 451 is parallel to the axial direction of the first gear 441; a return spring 28 is provided in the slide groove and on both sides of the slider, one end of the return spring 28 is fixedly connected to the bottom wall of the slide groove, and the other end of the return spring 28 is fixedly connected to the slider.

[0049] The implementation principle of the small box girder support structure of an assembled bridge in an embodiment of the present application is as follows: when assembling and fixing the small box girder, the small box girder is hoisted on the hanging beam 46 by the hook 461, and the first winding wheel 41 is driven to rotate by the first motor 32 to lift the small box girder to a certain height, and the small box girder is located above the two support platforms 54, and the bidirectional screw 61 is driven to rotate by the servo motor 62. While the bidirectional screw 61 rotates, it drives the first support arm 521 and the second support arm 531 to slide in the direction of approaching or moving away from each other at the same time, so that a space that is just enough to place the small box girder is formed between the first support arm 521 and the second support arm 531.

[0050] The mounting plate 27 is driven by the rodless cylinder to slide toward the second gear 241, so that the transmission gear 451 is disengaged from the first gear 441 and meshed with the second gear 241. The second motor 45 drives the transmission gear 451 to rotate, and drives the second gear 241 to rotate. The second gear 241 drives the second winding wheel 23 to rotate, pulling the lifting platform 5 up and down, so that the two support platforms 54 contact the bottom wall of the small box beam, and the small box beam is supported by the two support platforms 54. The small box beam is adjusted by the first support arm 521 and the second support arm 531. Afterwards, the first motor 32 drives the gear hobbing 31 to rotate, thereby driving the slide 2 to slide on the beam frame 1, driving the small box beam to dock with the installed small box beam or cap beam;

[0051] Insert steel bars into the embedded holes processed during the prefabrication production process, and use grouting sleeves to perform grouting to fix the small box beam to the already installed small box beam or cap beam. After that, the subsequent assembly and fixation of the small box beams can be continued. When assembling and fixing the small box beams between the already installed small box beams, there is no need to wait for the concrete to completely solidify before installing and fixing the subsequent box beams, thereby greatly shortening the construction period of the small box beam installation, and to a certain extent reducing the pollution time to the surrounding environment and reducing energy consumption.

[0052] The present application also discloses a method for constructing a small box girder support structure of an assembled bridge, comprising the following steps:

[0053] S1. Hoist the small box girder on the hanging beam 46, drive the first winding wheel 41 to rotate by the first motor 32, hoist the small box girder to a certain height, and make the small box girder be above the two support platforms 54;

[0054] S2. The mounting plate 27 is driven by the rodless cylinder to slide toward the second gear 241, so that the transmission gear 451 is disengaged from the first gear 441 and meshed with the second gear 241. The second motor 45 drives the transmission gear 451 to rotate, and drives the second gear 241 to rotate. The second gear 241 drives the second winding wheel 23 to rotate, pulling the lifting platform 5 up and down, so that the two support platforms 54 contact the bottom wall of the small box beam, and the small box beam is supported by the two support platforms 54. The small box beam is adjusted by the first support arm 521 and the second support arm 531, and the small box beam is driven by the lifting platform 5 to be at the same horizontal height as the installed small box beam;

[0055] S3, the first motor 32 drives the gear hobbing 31 to rotate, thereby driving the slide 2 to slide on the beam frame 1, driving the small box beam to dock with the installed small box beam or cap beam, inserting steel bars into the embedded holes processed in the prefabrication production process, and grouting with the grouting sleeve;

[0056] S4. After the grouting is completed, proceed with the subsequent assembly and fixation of the small box beams.

[0057] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A small box girder support structure for an assembled bridge, characterized by: The invention comprises a beam frame (1), wherein the beam frame (1) is arranged horizontally, and a plurality of slides (2) are arranged on the beam frame (1) so as to slide along the length direction of the beam frame (1), each of the slides (2) is provided with a first driving component (3) for driving the slide (2) to slide on the beam frame (1), and each of the slides (2) is provided with a hoisting component (4) for hoisting a small box beam; A first support arm (521) and a second support arm (531) are slidably provided on each of the slides (2); the first support arm (521) and the second support arm (531) are both adapted to the side walls of the small box beam; a support platform (54) for supporting the small box beam is fixedly provided on the first support arm (521) and the second support arm (531); and a second driving assembly (6) for driving the first support arm (521) and the second support arm (531) to slide in a direction of approaching or moving away from each other is provided on the slide (2); The first driving assembly (3) includes a gear hob (31) and a first motor (32); a rack (13) is fixedly provided on the beam (1); the length direction of the rack (13) is parallel to the length direction of the beam (1); the gear hob (31) is rotatably provided on the slide (2) and meshes with the rack (13); the first motor (32) is fixedly provided on the slide (2), and the output shaft of the first motor (32) is coaxially fixedly connected to the gear hob (31).

2. The small box girder support structure of a prefabricated bridge according to claim 1, characterized in that: The hoisting assembly (4) includes a first winding wheel (41), a first pull rope (42), a first worm wheel (43), a first worm (44), a driving source and a hanging beam (46); the first winding wheel (41) is rotatably arranged on the slide (2); the first pull rope (42) is wound around the first winding wheel (41); the first worm wheel (43) is coaxially fixedly connected to the first winding wheel (41); the first worm (44) is rotatably arranged on the slide (2) and meshed with the first worm wheel (43); the driving source is used to drive the first worm (44) to rotate; the hanging beam (46) is fixedly arranged at one end of the first pull rope (42) away from the first winding wheel (41); and a plurality of hooks (461) are provided on the hanging beam (46).

3. The small box girder support structure of a prefabricated bridge according to claim 2, characterized in that: A lifting platform (5) is provided on the slide (2) for sliding in the vertical direction, the first support arm (521) and the second support arm (531) are both provided for sliding on the lifting platform (5), a second winding wheel (23) is provided for rotation on the slide (2), a second pull rope (231) is wound around the second winding wheel (23), the second pull rope (231) is fixedly connected to the lifting platform (5), a second worm gear (232) is coaxially fixedly provided on the second winding wheel (23), a second worm gear (24) is also provided for rotation on the slide (2), and the second worm gear (24) is meshed with the second worm gear (232); A first gear (441) is coaxially fixedly provided on the first worm (44), a second gear (241) is coaxially fixedly provided on the second worm (24), the driving source comprises a second motor (45), a mounting plate (27) is slidably provided on the slide (2) and located between the first gear (441) and the second gear (241), the second motor (45) is fixedly provided on the mounting plate (27), a transmission gear (451) is coaxially fixedly provided on the output shaft of the second motor (45), the transmission gear (451) is used to mesh with the first gear (441) or the second gear (241), and a driving member (26) is provided on the slide (2) for driving the mounting plate (27) to slide.

4. The small box girder support structure of a prefabricated bridge according to claim 3, characterized in that: A support plate (25) is provided on the slide (2) so as to slide along the sliding direction of the mounting plate (27); a slide groove is provided on the support plate (25) so as to slide along the sliding direction of the mounting plate (27); a slider is fixedly provided on the mounting plate (27); the slider is slidably provided in the slide groove; a return spring (28) is provided in the slide groove and on both sides of the slider; one end of the return spring (28) is fixedly connected to the bottom wall of the slide groove, and the other end of the return spring (28) is fixedly connected to the slider; the driving member (26) is used to drive the support plate (25) to slide.

5. The small box girder support structure of a prefabricated bridge according to claim 3, characterized in that: The second drive assembly (6) comprises a bidirectional lead screw (61) and a servo motor (62); the bidirectional lead screw (61) is rotatably arranged on the lifting platform (5); the bidirectional lead screw (61) is horizontally arranged, and the two ends of the bidirectional lead screw (61) are respectively threadedly connected to the first support arm (521) and the second support arm (531); the servo motor (62) is fixedly arranged on the lifting platform (5), and the output shaft of the servo motor (62) is coaxially fixedly connected to the bidirectional lead screw (61).

6. The small box girder support structure of a prefabricated bridge according to claim 3, characterized in that: A plurality of rollers (55) are rotatably provided on one end of the first support arm (521) and the second support arm (531) close to each other. The axes of the plurality of rollers (55) are parallel, and the rollers (55) are used for rolling connection with the small box beam.

7. The construction method of a small box girder support structure of an assembled bridge according to claim 3, characterized in that: The following steps are involved: S1. Hoist the small box girder on the hoisting beam (46), and hoist the small box girder to a certain height so that the small box girder is located between the first support arm (521) and the second support arm (531), and above the support platform (54); S2, driving the first support arm (521) and the second support arm (531) to approach each other, and driving the lifting platform (5) to rise, placing the small box beam on the support platform (54) of the first support arm (521) and the second support arm (531), adjusting the position of the small box beam by the first support arm (521) and the second support arm (531), and driving the small box beam to be at the same level as the installed small box beam by the lifting platform (5); S3, driving the slide (2) to slide, driving the small box beam to dock with the installed small box beam or cap beam, inserting steel bars into the embedded holes processed during the prefabrication production process, and grouting with a grouting sleeve; S4. After the grouting is completed, proceed with the subsequent assembly and fixation of the small box beams.

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