A large-span steel box girder for crossing a highway and its construction technology

Abstract

The present invention discloses a large-span steel box girder for crossing a highway and a construction process thereof. The following scheme is proposed, which comprises a plurality of first steel box girders and second steel box girders, wherein temporary piers are arranged at the bottoms of two adjacent first steel box girders and second steel box girders, wherein a guide assembly for guiding the orientation of another first steel box girder is arranged in the first steel box girder, and an alignment assembly for aligning the adjacent first steel box girder and second steel box girder is arranged on one side of the first steel box girder. The present invention can preliminarily guide the position of the first steel box girder to be hoisted through the cooperation of an L-shaped groove and an L-shaped block, and the first guide plate and the second guide plate can not only position the first steel box girder to be hoisted again during the sliding process, but also can increase the stability between the two adjacent first steel box girders through the clamping connection between the second fixing block and the second clamping groove, and the clamping connection between the first fixing block and the first clamping groove.

Description

Technical Field

[0001] The invention relates to the technical field of highway construction, and in particular to a large-span steel box girder for crossing an expressway and a construction process thereof. Background Art

[0002] With the development of society, people's travel and logistics are increasingly dependent on road transportation. In cross-regional transportation, in order to ensure the safety and efficiency of driving, it is often necessary to build highways. The construction of highways is often inseparable from steel box girders. Steel box girders are widely used in large-span continuous beam bridges. They are generally composed of a top plate, a bottom plate, and a web plate. They have the advantages of good structural integrity, high torsional stiffness, and uniform lateral load distribution.

[0003] The construction steps of the steel box girder are divided into: foundation treatment → erection of temporary piers → on-site welding → hoisting → removal of temporary piers to carry out the installation of the steel box girder.

[0004] However, when hoisting the steel box girder to the temporary bridge pier, the construction workers need to pull and connect the two adjacent steel box girders on the temporary bridge pier to facilitate the subsequent welding of the steel box girders. The existing technology has the following shortcomings:

[0005] 1. When steel box girders are butt-jointed, it is often necessary to butt-join two adjacent steel box girders through positioning columns and positioning holes, and then use bolts to complete the splicing of the two steel box girders. For example, the new type of announcement number CN213740550U is used to butt-join another larger steel box girder through positioning columns and positioning holes, which requires construction personnel to gradually adjust the steel box girder. However, the steel box girder is large in size and heavy in weight. Therefore, it is difficult to find construction personnel to butt-join two adjacent steel box girders, which is time-consuming and labor-intensive, and the splicing efficiency is low;

[0006] 2. When the construction workers were docking two adjacent steel box girders at a height, the steel box girders were being pulled by the hoisting ropes. Due to the large size of the steel box girders, the steel box girders would swing during the docking process. Due to the difficulty in splicing, it takes a lot of time to dock. Therefore, if the construction workers were not careful, they would be bumped by the steel box girders, resulting in accidents.

[0007] 3. The two adjacent steel box girders are butt-jointed by bolts, resulting in unstable butt-jointing of the two steel box girders. Summary of the invention

[0008] The purpose of the present invention is to solve the problems in the prior art that it is difficult, time-consuming and labor-intensive to connect two adjacent steel box girders, accidents are prone to occur during the connection process, and the connection of steel box girders is unstable, and a compact structure of a large-span steel box girder across a highway and its construction process are proposed.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A large-span steel box girder for crossing a highway comprises a plurality of first steel box girders and a second steel box girders, wherein temporary bridge piers are arranged at the bottom of two adjacent first steel box girders and the second steel box girders;

[0011] A guide assembly for guiding the orientation of another first steel box girder is provided in the first steel box girder;

[0012] An alignment assembly for aligning the adjacent first steel box girder and the second steel box girder is provided on one side of the first steel box girder;

[0013] The first steel box girder is provided with a stabilizing component for increasing the stability between the first steel box girder and the second steel box girder.

[0014] Preferably, the guide assembly includes a driving motor fixedly connected to the bottom inner wall of the first steel box girder, the output shaft of the driving motor is fixedly connected to the second bevel gear, the first steel box girder is slidably connected to the first guide plate and the second guide plate on the sides away from each other, and the first guide plate and the second guide plate are provided with rectangular grooves on the sides close to each other, a rotating rod is rotated through the first steel box girder, both ends of the rotating rod extend into the corresponding rectangular grooves and are fixedly connected to spur gears, the bottom inner wall of the rectangular groove is fixedly connected to a rack meshing with the spur gear, the outer wall of the rotating rod is fixedly sleeved with a first bevel gear located in the first steel box girder, and the first bevel gear is meshed with the second bevel gear.

[0015] Preferably, the alignment assembly includes two trapezoidal blocks fixedly connected to the first steel box girder on one side close to the second steel box girder, and the second steel box girder is provided with a guide groove matching the trapezoidal blocks on one side of the guide groove close to the first steel box girder, and a guide block for guiding the trapezoidal blocks is fixedly connected to the inner wall of one side of the guide groove.

[0016] Preferably, the stabilizing assembly includes a first partition fixedly connected to the first steel box girder, a sliding groove is provided on a side of the first partition close to the second steel box girder, a screw is rotatably connected in the sliding groove, and the top end of the screw extends to the top of the first steel box girder, a plug plate is slidably connected in the sliding groove, a nut block threadably connected to the screw is slidably connected in the sliding groove, a connecting rod is rotatably connected to one side of the nut block, and the other end of the connecting rod is rotatably connected to the plug plate, and the plug plate extends into the second steel box girder away from the screw, and the nut block is driven to move by rotating the screw, and the plug plate can be pushed into the second steel box girder through the connecting rod, thereby increasing the stability between the first steel box girder and the second steel box girder.

[0017] Preferably, two second partitions are fixedly connected inside the second steel box girder, and the two second partitions are located on both sides of the plug plate, a plurality of threaded rods are penetrated in the plug plate, and both ends of the threaded rods pass through the second partitions, and two nuts are provided on the threaded sleeves on the outer walls of the threaded rods, and the sides of the two nuts close to each other respectively touch the corresponding second partitions, and the plug plate can be fixedly connected to the second partition through the cooperation of the nuts and the threaded rods, thereby further increasing the stability between the first steel box girder and the second steel box girder.

[0018] Preferably, the first guide plate and the second guide plate are both provided with a first slide groove and a second slide groove on the side close to each other, and a first fixed block is slidably connected in the first slide groove, and a plurality of first springs are fixedly connected to the side of the first fixed block away from the first steel box girder, and the other end of the first spring is fixedly connected to an inner wall of one side of the first slide groove, and a first clamping groove engaged with the first fixed block is provided on both sides of the first steel box girder, and a second fixed block is slidably connected in the second slide groove, and a plurality of second springs are fixedly connected to the side of the second fixed block away from the first steel box girder, and the other end of the second spring is fixedly connected to an inner wall of one side of the second slide groove, and a second clamping groove engaged with the second fixed block is provided on the side of the first steel box girder away from each other, and the first fixed block is larger than the second clamping groove, so the first fixed block cannot extend into the second clamping groove.

[0019] Preferably, a plurality of L-shaped blocks are fixedly connected to one side of the first steel box girder, and an L-shaped groove cooperating with an adjacent L-shaped block is provided on the other side of the first steel box girder. When the L-shaped block extends into the L-shaped groove, the first steel box girder to be hoisted can be limited by the cooperation between the L-shaped groove and the L-shaped block, so that the first steel box girder can be aligned with the hoisted first steel box girder under the cooperation of the first guide plate and the second guide plate in the later stage.

[0020] Preferably, two clamping plates are fixedly connected in the guide groove, and the clamping plates are engaged with the trapezoidal blocks. The top of the plug plate is provided with a groove engaged with the guide block. The engagement of the clamping plates with the trapezoidal blocks can prevent the first steel box girder from tilting during the downward movement, and the guide block extends into the groove to brake the plug plate.

[0021] Preferably, both sides of the top of the first steel box girder and the second steel box girder are provided with a plurality of clamping grooves and rotating grooves, a screw rod is rotatably connected in the rotating groove, a sliding block is slidably connected to the screw rod, a cross plate is fixedly connected to the top of the sliding block, one end of the cross plate is fixedly connected to a rectangular plate, and the rectangular plate is engaged with the adjacent clamping groove, the screw rod is rotated, the screw rod is threadedly connected to the sliding block, the sliding block drives the rectangular plate to slide in the clamping groove, and the rectangular plate is tightly fitted to the inner wall of one side of the clamping groove, at this time, the two adjacent first steel box girders can be fixed and fitted by the rectangular plate, the cross plate and the sliding block.

[0022] The construction process of a large-span steel box girder across a highway comprises the following steps:

[0023] S1. Foundation treatment: To meet the foundation level requirements, pour C30 concrete leveling layer at each bracket with a minimum thickness of 20cm. At the same time, do a good job of safety protection and signage to play a role in traffic diversion.

[0024] S2. Erection of temporary piers: During the erection operation, the steel pipes should be erected from the bottom to the top. The bottom of the steel pipe pole should be firmly supported on the wooden board on the hardened ground through the bottom support, and the top of the pole should be firmly supported by the adjustable top support. At the same time, in order to further increase the overall stability of the temporary piers, after the temporary piers are erected, the wind ropes and fall chains should be used to pull the ropes at the four top corners of each temporary pier in time. During construction, the upper and lower connections with the top of the temporary pier and the ground must be firm, and the pulling of the ropes must be firm and reliable.

[0025] S3. On-site welding: Each section of prefabricated steel box girder unit is transported to the construction site and welded on-site into beam sections of the specified length.

[0026] S4, hoisting: hoist the first steel box girder to the top of the temporary bridge pier by a crane, at which point the first steel box girder touches one side of the first steel box girder that has been fixed before, and the first steel box girder is moved downward by a crane for a certain distance, so that a plurality of L-shaped blocks can extend into the L-shaped groove, and at this point the first steel box girder is still at a certain distance from the top of the temporary bridge pier;

[0027] S41, start the driving motor in the previous first steel box girder, the driving motor drives the rotating rod to rotate through the second bevel gear and the first bevel gear, the rotating rod drives the two spur gears to rotate, the spur gears are meshed with the racks, and the two racks respectively drive the first guide plate and the second guide plate to move in the direction of the first steel box girder just hoisted, when the first guide plate and the second guide plate move, the inclined surface of the first guide plate and the second guide plate close to each other guides the two sides of the first steel box girder, the first steel box girder moves a certain distance along the L-shaped groove under the action of the first guide plate and the second guide plate, and then the first guide plate and the second guide plate can align the first steel box girder just hoisted with the previous first steel box girder, with the movement of the first guide plate and the second guide plate, the second fixing block can be clamped into the second clamping groove in the adjacent first steel box girder, the first fixing block can be clamped into the first clamping groove, and then the two adjacent first steel box girders can be fixed, and then the aligned first steel box girder is hoisted to the top of the temporary bridge pier by the crane;

[0028] S42, when the first steel box girder is hoisted from top to bottom to the top of the temporary bridge pier, the rectangular plate can just fit into the clamping groove. After the first steel box girder is hoisted, the screw rod is rotated, the screw rod is threadedly connected with the sliding block, and the sliding block drives the cross plate and the cross plate to slide in the clamping groove. The rectangular plate fits tightly with the inner wall of one side of the clamping groove. At this time, the two adjacent first steel box girders can be fixed and fitted by the rectangular plate, the cross plate and the sliding block;

[0029] S43, the first steel box girder is hoisted from both sides to the middle. After all the first steel box girders are hoisted and fixed, the second steel box girder is hoisted to the other side of the first steel box girder. Similarly, the second steel box girder is hoisted from both sides to the middle. When one side of the second steel box girder is in contact with one side of the first steel box girder, the second steel box girder is driven downward by a crane. When the second steel box girder moves downward, the trapezoidal block extends into the guide groove. The interior of the guide groove cooperates with the trapezoidal block, so as to guide the suspended second steel box girder.

[0030] S44, then rotate the screw rod, the screw rod is threadedly connected with the nut block, the nut block moves downward, the nut block drives the connecting rod to rotate, the connecting rod pushes the plug plate out of the first steel box girder until the plug plate extends into the second steel box girder, and then hoist the second steel box girder to the top of the corresponding temporary pier, at this time the guide block can just be stuck in the groove, the groove is clamped, the plug plate extending into the second steel box girder is fixed to the second partition by bolts, and the stability of the first steel box girder and the second steel box girder is further increased. When the first steel box girder and the second steel box girder are spliced, the drive motor in the first steel box girder is disassembled.

[0031] S5. Dismantle temporary piers: Dismantle temporary piers and pour ultra-high performance concrete and asphalt concrete pavement on the bridge deck;

[0032] S6. Site painting: The site mainly completes the repair of damaged coatings, the repair of steel beam circumferential seams and the final topcoat. After the site welds are inspected and qualified, their surfaces shall be manually mechanically derusted and meet the GB / T8923.2-2008St3.0 standard for "Surface Treatment of Steel Materials Before Coating". Site painting shall be carried out in accordance with the corresponding coating technology and process requirements.

[0033] Compared with the prior art, the present invention provides a large-span steel box girder for crossing a highway, which has the following beneficial effects:

[0034] 1. A first guide plate and a second guide plate of a large-span steel box girder that crosses a highway are provided with rectangular grooves on their sides close to each other, two ends of the rotating rod respectively extend into the corresponding rectangular grooves and are fixedly connected with spur gears, a rack meshing with the spur gear is fixedly connected to the bottom inner wall of the rectangular groove, the spur gear is driven to rotate by the rotating rod, the spur gear is meshed with the rack, and then the first guide plate and the second guide plate rotate with the rotation of the spur gear, and then the cooperation of the first guide plate and the second guide plate can guide the first steel box girder to be hoisted, and then the two adjacent first steel box girders can be butt-jointed without excessive manual pulling of the first steel box girder, which not only improves the splicing efficiency but also reduces the risk of accidents for construction personnel.

[0035] 2. The long-span steel box girder of a highway is slidably connected to a first fixing block in a first slide groove, and the first fixing block is fixedly connected to a side away from the first steel box girder with multiple first springs, and the other end of the first spring is fixedly connected to an inner wall of one side of the first slide groove, and both sides of the first steel box girder are provided with a first clamping groove engaged with the first fixing block, and the second fixing block is fixedly connected to a side away from the first steel box girder, and the other end of the second spring is fixedly connected to an inner wall of one side of the second slide groove, and the first steel box girder is slidably connected to a second fixing block on a side away from each other. The first steel box girder is provided with a second clamping groove engaged with the second fixing block when the first guide plate and the second guide plate move to guide the first steel box girder for belt hoisting. The clamping of the second fixing block and the first clamping groove can also increase the stability between the two adjacent first steel box girders.

[0036] 3. A first steel box girder of a large-span steel box girder crossing a highway is fixedly connected to a plurality of L-shaped blocks on one side, and an L-shaped groove cooperating with an adjacent L-shaped block is provided on the other side of the first steel box girder. When the L-shaped block extends into the L-shaped groove, the first steel box girder to be hoisted can be initially limited by the cooperation between the L-shaped groove and the L-shaped block, so that the first steel box girder can be aligned with the hoisted first steel box girder with the cooperation of the first guide plate and the second guide plate in the later stage.

[0037] 4. A first partition plate of a large-span steel box girder that crosses a highway is provided with a sliding groove on a side close to the second steel box girder, a screw is rotatably connected in the sliding groove, and the top end of the screw extends to the top of the first steel box girder, a plug plate is slidably connected in the sliding groove, a nut block threadedly connected to the screw is slidably connected in the sliding groove, a connecting rod is rotatably connected to one side of the nut block, and the other end of the connecting rod is rotatably connected to the plug plate, and the plug plate extends into the second steel box girder away from the screw, and the nut block is driven to move by rotating the screw, and the plug plate can be pushed into the second steel box girder through the connecting rod, thereby increasing the stability between the first steel box girder and the second steel box girder.

[0038] The present invention has a simple structure. The first steel box girder to be hoisted can be preliminarily guided in position through the cooperation of the L-shaped groove and the L-shaped block, and the driving motor is started to drive the rotating rod to rotate, and the rotating rod drives the first guide plate and the second guide plate to slide. During the sliding process, the first guide plate and the second guide plate can not only position the first steel box girder to be hoisted again, but also increase the stability between the two adjacent first steel box girders through the clamping connection between the second fixing block and the second clamping groove, and the clamping connection between the first fixing block and the first clamping groove. In addition, the insert plate is extended into the second steel box girder, and the insert plate and the second partition plate are fixed by the threaded rod and the nut, thereby increasing the stability between the first steel box girder and the second steel box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A three-dimensional diagram of a large-span steel box girder across a highway proposed by the present invention;

[0040] Figure 2 A side view of a large-span steel box girder across a highway proposed by the present invention;

[0041] Figure 3 A three-dimensional diagram of a first steel box girder of a large-span steel box girder that crosses a highway proposed by the present invention;

[0042] Figure 4 A three-dimensional diagram of a first steel box girder of a large-span steel box girder that crosses a highway proposed by the present invention;

[0043] Figure 5 A three-dimensional diagram of a first guide plate and a second guide plate of a large-span steel box girder across a highway proposed by the present invention;

[0044] Figure 6 A three-dimensional cross-sectional view of a first steel box girder and a second steel box girder of a large-span steel box girder that crosses a highway proposed by the present invention;

[0045] Figure 7 A three-dimensional diagram of a second steel box girder of a large-span steel box girder that crosses a highway proposed by the present invention;

[0046] Figure 8 A three-dimensional cross-sectional view of a first diaphragm of a large-span steel box girder across a highway proposed by the present invention;

[0047] Fig. 9 It is a side cross-sectional view of two adjacent first steel box girders of a large-span steel box girder spanning a highway proposed by the present invention in Example 2.

[0048] In the figure: 1, first steel box beam; 2, second steel box beam; 3, temporary bridge pier; 4, first guide plate; 5, second guide plate; 6, rectangular groove; 7, rack; 8, rotating rod; 9, spur gear; 10, first bevel gear; 11, driving motor; 12, second bevel gear; 13, first slide; 14, first spring; 15, first fixed block; 16, first slot; 17, second slide; 18, second spring; 19, second fixed block; 20, The second clamping slot; 21. L-shaped slot; 22. L-shaped block; 23. trapezoidal block; 24. guide slot; 25. guide block; 26. first partition; 27. second partition; 28. sliding slot; 29. ​​screw; 30. plug plate; 31. nut block; 32. connecting rod; 33. groove; 34. threaded rod; 35. nut; 36. clamping plate; 37. clamping slot; 38. screw; 39. sliding block; 40. horizontal plate; 41. rectangular plate; 42. rotating slot. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0050] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] Embodiment 1:

[0052] Reference Figure 1-Figure 8 A large-span steel box girder for crossing a highway comprises a plurality of first steel box girders 1 and a second steel box girders 2, temporary piers 3 are arranged at the bottoms of two adjacent first steel box girders 1 and the second steel box girders 2, a guide assembly for guiding the orientation of another first steel box girder 1 is arranged in the first steel box girder 1, an alignment assembly for aligning the adjacent first steel box girder 1 and the second steel box girder 2 is arranged on one side of the first steel box girder 1, a stabilizing assembly for increasing the stability between the first steel box girder 1 and the second steel box girder 2 is arranged in the first steel box girder 1, a plurality of L-shaped blocks 22 are fixedly connected to one side of the first steel box girder 1 by bolts, an L-shaped groove 21 is arranged on the other side of the first steel box girder 1 for matching with the adjacent L-shaped blocks 22, when the L-shaped block 22 extends into the L-shaped groove 21, the first steel box girder 1 to be hoisted can be limited by matching with the L-shaped groove 21 and the L-shaped block 22, so that the first steel box girder 1 can be aligned with the hoisted first steel box girder 1 in the later stage under the matching of the first guide plate 4 and the second guide plate 5.

[0053] In the present invention, the guide assembly includes a drive motor 11 fixedly connected to the bottom inner wall of the first steel box girder 1 by bolts, the output shaft of the drive motor 11 is fixedly connected to the second bevel gear 12, the first steel box girder 1 is slidably connected to the first guide plate 4 and the second guide plate 5 on the side away from each other, and the first guide plate 4 and the second guide plate 5 are provided with a rectangular groove 6 on the side close to each other, and a rotating rod 8 is rotated through the first steel box girder 1, and the two ends of the rotating rod 8 extend into the corresponding rectangular groove 6 respectively and are fixedly connected to the spur gear 9, and the bottom inner wall of the rectangular groove 6 is fixedly connected to the gear meshing with the spur gear 9 by bolts. The outer wall of the rotating rod 8 is fixedly sleeved with a first bevel gear 10 located in the first steel box girder 1, and the first bevel gear 10 is meshed with the second bevel gear 12. The spur gear 9 is driven to rotate by the rotating rod 8, and the spur gear 9 is meshed with the rack 7. Then, with the rotation of the spur gear 9, the first guide plate 4 and the second guide plate 5 are engaged. Then, the cooperation of the first guide plate 4 and the second guide plate 5 can guide the first steel box girder 1 to be hoisted, and then the docking of two adjacent first steel box girders 1 can be completed without excessive manual traction of the first steel box girder 1, which not only improves the splicing efficiency but also reduces the risk of accidents for construction personnel.

[0054] In the present invention, the alignment assembly includes two trapezoidal blocks 23 fixedly connected to the first steel box girder 1 on the side close to the second steel box girder 2 by bolts, and the second steel box girder 2 is provided with a guide groove 24 cooperating with the trapezoidal blocks 23 on the side close to the first steel box girder 1, and a guide block 25 for guiding the trapezoidal blocks 23 is fixedly connected to the inner wall of one side of the guide groove 24 by bolts.

[0055] In the present invention, the stabilizing component includes a first partition plate 26 fixedly connected to the first steel box girder 1 by bolts, a sliding groove 28 is provided on the side of the first partition plate 26 close to the second steel box girder 2, a screw rod 29 is rotatably connected in the sliding groove 28, and the top end of the screw rod 29 extends to the top of the first steel box girder 1, a plug plate 30 is slidably connected in the sliding groove 28, a nut block 31 threadedly connected to the screw rod 29 is slidably connected in the sliding groove 28, a connecting rod 32 is rotatably connected to one side of the nut block 31, and the other end of the connecting rod 32 is rotatably connected to the plug plate 30, and the side of the plug plate 30 away from the screw rod 29 extends into the second steel box girder 2, and the nut block 31 is driven to move by rotating the screw 29, and then the plug plate 30 can be pushed into the second steel box girder 2 through the connecting rod 32, which can increase the stability between the first steel box girder 1 and the second steel box girder 2.

[0056] In the present invention, two second partitions 27 are fixedly connected in the second steel box girder 2 by bolts, and the two second partitions 27 are located on both sides of the plug plate 30. A plurality of threaded rods 34 are penetrated in the plug plate 30, and both ends of the threaded rods 34 penetrate the second partitions 27. Two nuts 35 are threadedly sleeved on the outer wall of the threaded rods 34. The sides of the two nuts 35 close to each other respectively touch the corresponding second partitions 27. The plug plate 30 can be fixedly connected with the second partition 27 through the cooperation of the nuts 35 and the threaded rods 34, thereby further increasing the stability between the first steel box girder 1 and the second steel box girder 2.

[0057] In the present invention, the first guide plate 4 and the second guide plate 5 are provided with a first slide groove 13 and a second slide groove 17 on the side close to each other, the first slide groove 13 is slidably connected with a first fixed block 15, the first fixed block 15 is fixedly connected with a plurality of first springs 14 on the side away from the first steel box girder 1, and the other end of the first spring 14 is fixedly connected with an inner wall of one side of the first slide groove 13, and the first steel box girder 1 is provided with a first card groove 16 engaged with the first fixed block 15 on both sides, and the second slide groove 17 is slidably connected with a second fixed block 19, and the second fixed block 19 is fixedly connected with a plurality of first springs 14 on the side away from the first steel box girder 1. A second spring 18, and the other end of the second spring 18 is fixedly connected to the inner wall of one side of the second slide groove 17, and the sides of the first steel box girders 1 that are away from each other are provided with a second card slot 20 that is engaged with the second fixing block 19, and the first fixing block 15 is larger than the second card slot 20, so the first fixing block 15 cannot extend into the second card slot 20. When the first guide plate 4 and the second guide plate 5 move to guide the first steel box girder 1 for lifting, the stability between the two adjacent first steel box girders 1 can also be increased through the card slot connection between the second fixing block 19 and the second card slot 20, and the card slot connection between the first fixing block 15 and the first card slot 16.

[0058] In the present invention, two clamping plates 36 are fixedly connected in the guide groove 24, and the clamping plates 36 are engaged with the trapezoidal block 23. A groove 33 engaged with the guide block 25 is provided on the top of the plug plate 30. The engagement of the trapezoidal block 23 by the clamping plates 36 can prevent the first steel box girder 1 from tilting during the downward movement, and the guide block 25 extends into the groove 33 to brake the plug plate 30.

[0059] Embodiment 2:

[0060] Reference Figure 1-Figure 9A large-span steel box girder for crossing a highway comprises a plurality of first steel box girders 1 and a second steel box girders 2, temporary piers 3 are arranged at the bottoms of two adjacent first steel box girders 1 and the second steel box girders 2, a guide assembly for guiding the orientation of another first steel box girder 1 is arranged in the first steel box girder 1, an alignment assembly for aligning the adjacent first steel box girder 1 and the second steel box girder 2 is arranged on one side of the first steel box girder 1, a stabilizing assembly for increasing the stability between the first steel box girder 1 and the second steel box girder 2 is arranged in the first steel box girder 1, a plurality of L-shaped blocks 22 are fixedly connected to one side of the first steel box girder 1 by bolts, an L-shaped groove 21 is arranged on the other side of the first steel box girder 1 for matching with the adjacent L-shaped blocks 22, when the L-shaped block 22 extends into the L-shaped groove 21, the first steel box girder 1 to be hoisted can be limited by matching with the L-shaped groove 21 and the L-shaped block 22, so that the first steel box girder 1 can be aligned with the hoisted first steel box girder 1 in the later stage under the matching of the first guide plate 4 and the second guide plate 5.

[0061] In the present invention, the guide assembly includes a drive motor 11 fixedly connected to the bottom inner wall of the first steel box girder 1 by bolts, the output shaft of the drive motor 11 is fixedly connected to the second bevel gear 12, the first steel box girder 1 is slidably connected to the first guide plate 4 and the second guide plate 5 on the side away from each other, and the first guide plate 4 and the second guide plate 5 are provided with a rectangular groove 6 on the side close to each other, and a rotating rod 8 is rotated through the first steel box girder 1, and the two ends of the rotating rod 8 extend into the corresponding rectangular groove 6 respectively and are fixedly connected to the spur gear 9, and the bottom inner wall of the rectangular groove 6 is fixedly connected to the gear meshing with the spur gear 9 by bolts. The outer wall of the rotating rod 8 is fixedly sleeved with a first bevel gear 10 located in the first steel box girder 1, and the first bevel gear 10 is meshed with the second bevel gear 12. The spur gear 9 is driven to rotate by the rotating rod 8, and the spur gear 9 is meshed with the rack 7. Then, with the rotation of the spur gear 9, the first guide plate 4 and the second guide plate 5 are engaged. Then, the cooperation of the first guide plate 4 and the second guide plate 5 can guide the first steel box girder 1 to be hoisted, and then the docking of two adjacent first steel box girders 1 can be completed without excessive manual traction of the first steel box girder 1, which not only improves the splicing efficiency but also reduces the risk of accidents for construction personnel.

[0062] In the present invention, the alignment assembly includes two trapezoidal blocks 23 fixedly connected to the first steel box girder 1 on the side close to the second steel box girder 2 by bolts, and the second steel box girder 2 is provided with a guide groove 24 cooperating with the trapezoidal blocks 23 on the side close to the first steel box girder 1, and a guide block 25 for guiding the trapezoidal blocks 23 is fixedly connected to the inner wall of one side of the guide groove 24 by bolts.

[0063] In the present invention, the stabilizing component includes a first partition plate 26 fixedly connected to the first steel box girder 1 by bolts, a sliding groove 28 is provided on the side of the first partition plate 26 close to the second steel box girder 2, a screw rod 29 is rotatably connected in the sliding groove 28, and the top end of the screw rod 29 extends to the top of the first steel box girder 1, a plug plate 30 is slidably connected in the sliding groove 28, a nut block 31 threadedly connected to the screw rod 29 is slidably connected in the sliding groove 28, a connecting rod 32 is rotatably connected to one side of the nut block 31, and the other end of the connecting rod 32 is rotatably connected to the plug plate 30, and the side of the plug plate 30 away from the screw rod 29 extends into the second steel box girder 2, and the nut block 31 is driven to move by rotating the screw 29, and then the plug plate 30 can be pushed into the second steel box girder 2 through the connecting rod 32, which can increase the stability between the first steel box girder 1 and the second steel box girder 2.

[0064] In the present invention, two second partitions 27 are fixedly connected in the second steel box girder 2 by bolts, and the two second partitions 27 are located on both sides of the plug plate 30. A plurality of threaded rods 34 are penetrated in the plug plate 30, and both ends of the threaded rods 34 penetrate the second partitions 27. Two nuts 35 are threadedly sleeved on the outer wall of the threaded rods 34. The sides of the two nuts 35 close to each other respectively touch the corresponding second partitions 27. The plug plate 30 can be fixedly connected with the second partition 27 through the cooperation of the nuts 35 and the threaded rods 34, thereby further increasing the stability between the first steel box girder 1 and the second steel box girder 2.

[0065] In the present invention, the first guide plate 4 and the second guide plate 5 are provided with a first slide groove 13 and a second slide groove 17 on the side close to each other, the first slide groove 13 is slidably connected with a first fixed block 15, the first fixed block 15 is fixedly connected with a plurality of first springs 14 on the side away from the first steel box girder 1, and the other end of the first spring 14 is fixedly connected with an inner wall of one side of the first slide groove 13, and the first steel box girder 1 is provided with a first card groove 16 engaged with the first fixed block 15 on both sides, and the second slide groove 17 is slidably connected with a second fixed block 19, and the second fixed block 19 is fixedly connected with a plurality of first springs 14 on the side away from the first steel box girder 1. A second spring 18, and the other end of the second spring 18 is fixedly connected to the inner wall of one side of the second slide groove 17, and the sides of the first steel box girders 1 that are away from each other are provided with a second card slot 20 that is engaged with the second fixing block 19, and the first fixing block 15 is larger than the second card slot 20, so the first fixing block 15 cannot extend into the second card slot 20. When the first guide plate 4 and the second guide plate 5 move to guide the first steel box girder 1 for lifting, the stability between the two adjacent first steel box girders 1 can also be increased through the card slot connection between the second fixing block 19 and the second card slot 20, and the card slot connection between the first fixing block 15 and the first card slot 16.

[0066] In the present invention, two clamping plates 36 are fixedly connected in the guide groove 24, and the clamping plates 36 are engaged with the trapezoidal block 23. A groove 33 engaged with the guide block 25 is provided on the top of the plug plate 30. The engagement of the trapezoidal block 23 by the clamping plates 36 can prevent the first steel box girder 1 from tilting during the downward movement, and the guide block 25 extends into the groove 33 to brake the plug plate 30.

[0067] In the present invention, a plurality of clamping grooves 37 and rotating grooves 42 are provided on both sides of the top of the first steel box girder 1 and the second steel box girder 2. A screw rod 38 is rotatably connected in the rotating groove 42. A sliding block 39 threadedly connected to the screw rod 38 is slidably connected in the rotating groove 42. A cross plate 40 is fixedly connected to the top of the sliding block 39. A rectangular plate 41 is fixedly connected to one end of the cross plate 40, and the rectangular plate 41 is engaged with the adjacent clamping groove 37. The screw rod 38 is rotated, and the screw rod 38 is threadedly connected to the sliding block 39. The sliding block 39 drives the rectangular plate 41 to slide in the clamping groove 37. The rectangular plate 41 is tightly fitted with an inner wall of one side of the clamping groove 37. At this time, the two adjacent first steel box girders 1 can be fixed and fitted by the rectangular plate 41, the cross plate 40 and the sliding block 39.

[0068] A construction process for a large-span steel box girder across a highway comprises the following steps:

[0069] S1. Foundation treatment: To meet the foundation level requirements, pour C30 concrete leveling layer at each bracket with a minimum thickness of 20cm. At the same time, do a good job of safety protection and signage to play a role in traffic diversion.

[0070] S2. Erection of temporary piers: During the erection operation, the steel pipes should be erected from the bottom to the top. The bottom of the steel pipe pole should be firmly supported on the wooden board on the hardened ground through the bottom support, and the top of the pole should be firmly supported by the adjustable top support. At the same time, in order to further increase the overall stability of the temporary piers, after the temporary piers are erected, the wind ropes and fall chains should be used to pull the ropes at the four top corners of each temporary pier in time. During construction, the upper and lower connections with the top of the temporary pier and the ground must be firm, and the pulling of the ropes must be firm and reliable.

[0071] S3. On-site welding: Each section of prefabricated steel box girder unit is transported to the construction site and welded on-site into beam sections of the specified length.

[0072] S4, hoisting: hoist the first steel box girder 1 to the top of the temporary bridge pier 3 by a crane, at which time the first steel box girder 1 touches one side of the first steel box girder 1 that has been fixed before, and the first steel box girder 1 is moved downward by a crane for a certain distance, so that the multiple L-shaped blocks 22 can extend into the L-shaped groove 21, and at this time, there is still a certain distance between the first steel box girder 1 and the top of the temporary bridge pier 3;

[0073] S41, start the driving motor 11 in the previous first steel box girder 1, the driving motor 11 drives the rotating rod 8 to rotate through the second bevel gear 12 and the first bevel gear 10, the rotating rod 8 drives the two spur gears 9 to rotate, the spur gears 9 are meshed with the rack 7, the two racks 7 respectively drive the first guide plate 4 and the second guide plate 5 to move toward the first steel box girder 1 just hoisted, when the first guide plate 4 and the second guide plate 5 move, the first guide plate 4 and the second guide plate 5 are inclined on one side close to each other to guide the two sides of the first steel box girder 1, the first steel box girder 1 is on the first guide plate Under the action of the guide plate 4 and the second guide plate 5, the guide plate 4 and the second guide plate 5 move a certain distance along the L-shaped groove 21, so that the first guide plate 4 and the second guide plate 5 can align the first steel box girder 1 just hoisted with the previous first steel box girder 1. With the movement of the first guide plate 4 and the second guide plate 5, the second fixing block 19 can be inserted into the second slot 20 in the adjacent first steel box girder 1, and the first fixing block 15 can be inserted into the first slot 16, so that the two adjacent first steel box girders 1 can be fixed, and then the aligned first steel box girder 1 is hoisted to the top of the temporary bridge pier 3 by a crane;

[0074] S42, when the first steel box girder 1 is hoisted from top to bottom to the top of the temporary bridge pier 3, the rectangular plate 41 can just fit into the clamping groove 37. After the first steel box girder 1 is hoisted, the screw rod 38 is rotated, the screw rod 38 is threadedly connected with the sliding block 39, and the sliding block 39 drives the cross plate 40 and the cross plate 40 to slide in the clamping groove 37. The rectangular plate 41 is tightly fitted with the inner wall of one side of the clamping groove 37. At this time, the two adjacent first steel box girders 1 can be fixed and fitted by the rectangular plate 41, the cross plate 40 and the sliding block 39;

[0075] S43, the first steel box girder 1 is hoisted from both sides to the middle. After all the first steel box girders 1 are hoisted and fixed, the second steel box girder 2 is hoisted to the other side of the first steel box girder 1. Similarly, the second steel box girder 2 is hoisted from both sides to the middle. When one side of the second steel box girder 2 is in contact with one side of the first steel box girder 1, the second steel box girder 2 is driven downward by a crane. When the second steel box girder 2 moves downward, the trapezoidal block 23 extends into the guide groove 24. The interior of the guide groove 24 cooperates with the trapezoidal block 23, so as to guide the suspended second steel box girder 2.

[0076] S44, then rotate the screw rod 29, the screw rod 29 is threadedly connected with the nut block 31, the nut block 31 moves downward, the nut block 31 drives the connecting rod 32 to rotate, the connecting rod 32 pushes the plug plate 30 out of the first steel box girder 1 until the plug plate 30 extends into the second steel box girder 2, and then hoist the second steel box girder 2 to the top of the corresponding temporary pier 3, at this time the guide block 25 can just be stuck in the groove 33, the groove 33 is clamped, the plug plate 30 extending into the second steel box girder 2 is fixed with the second partition plate 27 by bolts, the stability of the first steel box girder 1 and the second steel box girder 2 is further increased, and when the first steel box girder 1 and the second steel box girder 2 are spliced, the drive motor 11 in the first steel box girder 1 is disassembled.

[0077] S5. Dismantle temporary piers: Dismantle temporary piers and pour ultra-high performance concrete and asphalt concrete pavement on the bridge deck;

[0078] S6. Site painting: The site mainly completes the repair of damaged coatings, the repair of steel beam circumferential seams and the final topcoat. After the site welds are inspected and qualified, their surfaces shall be manually mechanically derusted and meet the GB / T8923.2-2008St3.0 standard for "Surface Treatment of Steel Materials Before Coating". Site painting shall be carried out in accordance with the corresponding coating technology and process requirements.

[0079] However, as is well known to those skilled in the art, the working principle and wiring method of the drive motor 11 belong to conventional means or common knowledge in the art and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0080] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A large-span steel box girder for crossing a highway, comprising a plurality of first steel box girders (1) and second steel box girders (2), characterized in that: Temporary bridge piers (3) are provided at the bottoms of two adjacent first steel box girders (1) and second steel box girders (2); A guide component for guiding the orientation of another first steel box girder (1) is provided in the first steel box girder (1); An alignment component for aligning the adjacent first steel box beam (1) and second steel box beam (2) is provided on one side of the first steel box beam (1); the alignment component comprises two trapezoidal blocks (23) fixedly connected to a side of the first steel box beam (1) close to the second steel box beam (2); a guide groove (24) cooperating with the trapezoidal blocks (23) is provided on a side of the second steel box beam (2) close to the first steel box beam (1); a guide block (25) for guiding the trapezoidal blocks (23) is fixedly connected to an inner wall of one side of the guide groove (24); A stabilizing assembly for increasing the stability between the first steel box girder (1) and the second steel box girder (2) is provided in the first steel box girder (1), the guide assembly comprising a driving motor (11) fixedly connected to the inner wall of the bottom of the first steel box girder (1), the output shaft of the driving motor (11) being fixedly connected to the second bevel gear (12), the first guide plate (4) and the second guide plate (5) being slidably connected to the sides of the first steel box girder (1) that are away from each other, the first guide plate (4) and the second guide plate (5) being close to each other are both provided with a rectangular groove (6), a rotating rod (8) is rotatably penetrated in the first steel box girder (1), the two ends of the rotating rod (8) respectively extend into the corresponding rectangular groove (6) and are both fixedly connected to a spur gear (9), the inner wall of the bottom of the rectangular groove (6) is fixedly connected to a rack (7) meshing with the spur gear (9), the outer wall of the rotating rod (8) is fixedly sleeved with a first bevel gear (10) located in the first steel box girder (1), and the first bevel gear (10) is meshing with the second bevel gear (12); The stabilizing component comprises a first partition plate (26) fixedly connected to the first steel box girder (1); a sliding groove (28) is provided on a side of the first partition plate (26) close to the second steel box girder (2); a screw rod (29) is rotatably connected to the sliding groove (28), and the top end of the screw rod (29) extends to the top of the first steel box girder (1); a plug plate (30) is slidably connected to the sliding groove (28); a nut block (31) threadedly connected to the screw rod (29) is slidably connected to the sliding groove (28); a connecting rod (32) is rotatably connected to one side of the nut block (31), and the other end of the connecting rod (32) is rotatably connected to the plug plate (30); and a side of the plug plate (30) away from the screw rod (29) extends into the second steel box girder (2).

2. The large-span steel box girder for crossing a highway according to claim 1, characterized in that: Two second partitions (27) are fixedly connected inside the second steel box girder (2), and the two second partitions (27) are located on both sides of the plug plate (30). A plurality of threaded rods (34) are provided through the plug plate (30), and both ends of the threaded rods (34) pass through the second partitions (27). Two nuts (35) are provided on the threaded sleeves of the outer walls of the threaded rods (34), and the two nuts (35) are close to each other and respectively contact the corresponding second partitions (27).

3. The large-span steel box girder for crossing a highway according to claim 2, characterized in that: A first slide groove (13) and a second slide groove (17) are provided on the sides of the first guide plate (4) and the second guide plate (5) close to each other; a first fixed block (15) is slidably connected in the first slide groove (13); a plurality of first springs (14) are fixedly connected to the side of the first fixed block (15) away from the first steel box girder (1), and the other end of the first spring (14) is fixedly connected to the inner wall of one side of the first slide groove (13); first clamping grooves (16) engaged with the first fixed block (15) are provided on both sides of the first steel box girder (1); a second fixed block (19) is slidably connected in the second slide groove (17); a plurality of second springs (18) are fixedly connected to the side of the second fixed block (19) away from the first steel box girder (1), and the other end of the second spring (18) is fixedly connected to the inner wall of one side of the second slide groove (17); and a second clamping groove (20) engaged with the second fixed block (19) is provided on the sides of the first steel box girder (1) away from each other.

4. The large-span steel box girder for crossing a highway according to claim 3, characterized in that: A plurality of L-shaped blocks (22) are fixedly connected to one side of the first steel box girder (1), and an L-shaped groove (21) matching with an adjacent L-shaped block (22) is provided on the other side of the first steel box girder (1).

5. The large-span steel box girder for crossing a highway according to claim 4, characterized in that: Two clamping plates (36) are fixedly connected in the guide groove (24), and the clamping plates (36) are engaged with the trapezoidal blocks (23). The top of the inserting plate (30) is provided with a groove (33) engaged with the guide block (25).

6. The large-span steel box girder for crossing a highway according to claim 5, characterized in that: A plurality of clamping grooves (37) and rotation grooves (42) are provided on both sides of the top of the first steel box girder (1) and the second steel box girder (2); a screw rod (38) is rotationally connected in the rotation groove (42); a sliding block (39) threadedly connected to the screw rod (38) is slidably connected in the rotation groove (42); a transverse plate (40) is fixedly connected to the top of the sliding block (39); a rectangular plate (41) is fixedly connected to one end of the transverse plate (40); and the rectangular plate (41) is engaged with an adjacent clamping groove (37).

7. The construction process of a large-span steel box girder across a highway according to claim 6, characterized in that: The following steps are involved: S1. Foundation treatment: To meet the foundation level requirements, pour C30 concrete leveling layer at each bracket with a minimum thickness of 20cm; at the same time, do a good job of safety protection and signage to play a role in traffic diversion; S2. Erection of temporary piers: During the erection operation, the steel pipes should be erected from the bottom to the upper floors. The bottom of the steel pipe pole should be firmly supported on the wooden board on the hardened ground through the bottom support, and the top of the pole should be firmly supported by the adjustable top support. At the same time, in order to further increase the overall stability of the temporary piers, after the temporary piers are erected, the wind ropes and fall chains should be used to pull the ropes at the four top corners of each temporary pier in time. During construction, the upper and lower connections with the top of the temporary pier and the ground must be firm, and the pulling of the ropes must be firm and reliable. S3, on-site welding: transport each section of prefabricated steel box beam units to the construction site and weld them on site into beam sections of the length specified in the design; S4, hoisting: hoisting the first steel box girder (1) to the top of the temporary bridge pier (3) by a crane, at which time the first steel box girder (1) touches one side of the first steel box girder (1) that has been fixed previously, and moving the first steel box girder (1) downward by a certain distance by the crane, so that the plurality of L-shaped blocks (22) can extend into the L-shaped groove (21), while the first steel box girder (1) is still at a certain distance from the top of the temporary bridge pier (3); S41, start the driving motor (11) in the previous first steel box girder (1), the driving motor (11) drives the rotating rod (8) to rotate through the second bevel gear (12) and the first bevel gear (10), the rotating rod (8) drives the two spur gears (9) to rotate, the spur gears (9) are meshed with the rack (7), the two racks (7) respectively drive the first guide plate (4) and the second guide plate (5) to move in the direction of the first steel box girder (1) just hoisted, when the first guide plate (4) and the second guide plate (5) move, the inclined surfaces of the first guide plate (4) and the second guide plate (5) close to each other guide the two sides of the first steel box girder (1), the first steel box girder (1) is The first guide plate (4) and the second guide plate (5) move a certain distance along the L-shaped groove (21), so that the first guide plate (4) and the second guide plate (5) can align the first steel box girder (1) just hoisted with the previous first steel box girder (1). As the first guide plate (4) and the second guide plate (5) move, the second fixing block (19) can be inserted into the second slot (20) in the adjacent first steel box girder (1), and the first fixing block (15) can be inserted into the first slot (16), so that the two adjacent first steel box girders (1) can be fixed. Then, the aligned first steel box girder (1) is hoisted to the top of the temporary bridge pier (3) by a crane; S42, when the first steel box girder (1) is hoisted from top to bottom to the top of the temporary bridge pier (3), the rectangular plate (41) can just fit into the clamping groove (37). After the first steel box girder (1) is hoisted, the screw rod (38) is rotated, the screw rod (38) is threadedly connected to the sliding block (39), and the sliding block (39) drives the cross plate (40) and the cross plate (40) to slide in the clamping groove (37). The rectangular plate (41) is tightly fitted with the inner wall of one side of the clamping groove (37). At this time, the two adjacent first steel box girders (1) can be fixed and fitted by the rectangular plate (41), the cross plate (40) and the sliding block (39); S43, the first steel box girder (1) is hoisted from both sides to the middle. After all the first steel box girders (1) are hoisted and fixed, the second steel box girder (2) is hoisted to the other side of the first steel box girder (1). Similarly, the second steel box girder (2) is hoisted from both sides to the middle. When one side of the second steel box girder (2) is in contact with one side of the first steel box girder (1), the second steel box girder (2) is driven downward by a crane. When the second steel box girder (2) moves downward, the trapezoidal block (23) extends into the guide groove (24). The interior of the guide groove (24) cooperates with the trapezoidal block (23), so as to guide the suspended second steel box girder (2); S44, then the screw rod (29) is rotated, the screw rod (29) is threadedly connected with the nut block (31), the nut block (31) moves downward, the nut block (31) drives the connecting rod (32) to rotate, the connecting rod (32) pushes the plug plate (30) out of the first steel box girder (1) until the plug plate (30) extends into the second steel box girder (2), and then the second steel box girder (2) is hoisted to the top of the corresponding temporary bridge pier (3), at this time, the guide block (25) can just fit into the groove (33), the groove (33) is clamped, and the plug plate (30) extending into the second steel box girder (2) is fixed to the second partition (27) by bolts, so as to further increase the stability of the first steel box girder (1) and the second steel box girder (2), and when the first steel box girder (1) and the second steel box girder (2) are spliced, the drive motor (11) in the first steel box girder (1) is disassembled; S5. Dismantle temporary piers: Dismantle temporary piers and pour ultra-high performance concrete and asphalt concrete pavement on the bridge deck; S6. Site painting: The site mainly completes the repair of damaged coatings, steel beam circumferential seam repair and the final coat of topcoat. After the site welds are inspected and qualified, their surfaces shall be derusted by manual machinery and meet the "Surface Treatment of Steel Materials Before Coating" GB / T8923.2-2008 St3.0 standard. Site painting shall be carried out in accordance with the corresponding coating technical process requirements.

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