Large-span and large-height-difference steel box girder pushing system

Abstract

The utility model relates to a large-span and large-height-difference steel box girder pushing system which comprises existing piers, an assembling system, a pushing system, a guide beam system and a steel box girder. Temporary supports are arranged on the two sides of the existing pier, a bottom joist is installed above the existing pier between the temporary supports, and the splicing system is installed above the bottom joist. The utility model has the beneficial effects that in an assembling system, the combination of various components such as the steel box girder, the existing pier, the temporary bracket and the bailey beam is adopted, so that the stability and the flexibility of construction are greatly improved; the bracket and the bracket are arranged on the opposite sides of the temporary support and the existing pier, so that the safety and the adaptability of the structure are ensured; the pushing system comprises a temporary support and a front guide beam and is further provided with equipment such as a jack and a micro jack, and the equipment jointly acts on pushing operation of the steel box beam.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge engineering and its construction technical field especially including a large span big height difference steel box girder pushing system. BACKGROUND

[0002] Large span bridge not only can effectively solve the traffic bottleneck problem, can also reduce the project area, promotes the traffic efficiency. Among numerous bridge structures, steel box girder gradually becomes the mainstream choice of large span bridge because of its excellent mechanical property and economy. However, the construction technology of steel box girder is relatively complex, especially under big height difference and special topography condition, its construction difficulty and technical requirement improve significantly.

[0003] Traditional steel box girder construction method mainly includes hoisting, assembling and erecting etc. process. These methods can satisfy construction requirement to some extent, but still face many challenges in practical application. First, traditional construction mode often relies on a large number of temporary support structure and hoisting equipment, which not only increases construction cost, but also prolongs the construction period. In addition, in the construction process, the stability and safety of steel box girder are difficult to be effectively guaranteed, especially when high difference construction, prone to problems such as beam body deformation, inclination, and further affect the construction quality. In order to overcome the above problems, many researchers and engineers begin to explore new construction technology and equipment. Among them, pushing method as a new construction technology gradually arouses widespread concern. Pushing method sets up special pushing equipment on the built component, and gradually pushes steel box girder to the design position, so as to reduce the dependence on temporary support. This method shows good adaptability and stability in large span bridge construction, especially suitable for construction of big height difference and complex topography.

[0004] However, the existing pushing technology still has some deficiencies. For example, the pushing force and speed need to be accurately controlled in the pushing process to ensure the safety and stability of the beam body. In addition, the setting of pushing equipment and its connection relationship with the main structure also need special attention to avoid unnecessary vibration and deformation in the pushing process. Therefore, how to design an efficient and stable pushing system has become the focus of current technical research.

[0005] In summary, in the face of increasing traffic demand and increasingly complex construction environment, higher requirements are put forward for the construction technology of large span big height difference steel box girder. Therefore, a new type of large span big height difference steel box girder pushing system is urgently needed, which aims to improve the construction efficiency and safety of steel box girder through reasonable structure design and construction steps. UTILITY MODEL CONTENT

[0006] The utility model aims at overcoming the deficiency in prior art, and provides a large span big height difference steel box girder pushing system.

[0007] The large-span and large-height-difference steel box girder pushing system comprises existing piers, an assembling system, a pushing system, a guide beam system and a steel box girder.

[0008] Temporary supports are arranged on the two sides of the existing piers, bottom beams are arranged between the temporary supports above the existing piers, and the assembling system is arranged above the bottom beams; the steel box girder is assembled above the assembling system, the guide beam system is arranged at the front end of the steel box girder, temporary supports are arranged at intervals on the pushing route of the steel box girder, and the pushing system is arranged on the temporary supports on the pushing route of the steel box girder.

[0009] Preferably, the assembling system comprises a Bailey beam, the temporary supports comprise pipe piles, pile caps, sleeper beams and main beams, the temporary supports are provided with support brackets and support brackets on the opposite sides of the existing piers, pier top brackets and pier top brackets are arranged on the two sides of the existing piers, bottom beams are arranged on the support brackets and the pier top brackets, and the bottom beams are located above the water level.

[0010] Preferably, the bottom beams are arranged at intervals and are provided with support rods, the support rods are connected with the bottom beams through support rod anchors, the support rods are provided with top beams and distribution beams at the upper portions, the distribution beams are provided with the Bailey beams, the two sides of the Bailey beams are connected with the two temporary supports through anchor rods and Bailey beam anchors, the Bailey beams are provided with assembling supports, the assembling supports are provided with bases at the bottom portions, the bases are located on the top surfaces of the Bailey beams, and the assembling supports are provided with assembling adjusting beams at the top portions, and the assembling adjusting beams directly bear the steel box girder.

[0011] Preferably, the pushing system comprises temporary supports, a front guide beam and permanent piers, the temporary supports are arranged at intervals on the pushing route, the main beams of the temporary supports are provided with jacks, the jacks are provided with cushion beams, the cushion beams are provided with fixed frames on one side, the two fixed frames are provided with movable frames, the movable frames are provided with micro jacks and bottom cushion plates at the bottom portions, the movable frames are temporarily fixed with the two fixed frames through connecting rods, and the movable frames are provided with top cushion plates; the micro jacks at the bottom portions of the movable frames are used for adjusting the height of the top cushion plates.

[0012] Preferably, the guide beam system comprises a front guide beam at the front end of the steel box girder, the front guide beam is provided with a guide beam boss at the front portion, the guide beam boss is provided with an embedded groove, the embedded groove is provided with reverse embedded jacks, the embedded jacks and the guide beam boss are connected through vertical fixed rods, horizontal fixed rods and fixed ends, the embedded jacks are connected with reverse cushion beams through connecting frames, the reverse cushion beams are opposite to the cushion beams on the temporary supports, the reverse cushion beams and the cushion beams are movably connected through first connecting blocks, hinges, connecting shafts and second connecting blocks when the steel box girder is jacked up, and the reverse cushion beams and the cushion beams are disconnected when the steel box girder is pushed.

[0013] Preferably, the movable frames and the fixed frames are used for temporarily supporting the steel box girder, the micro jacks at the bottom portions of the movable frames are used for adjusting the height of the top cushion plates, and the cushion beams and the reverse cushion beams are used for falling the beam with large height difference.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1) The utility model discloses a steel box girder, existing pier, temporary support, bailey beam and the combination of various components, which greatly improves the stability and flexibility of construction. The bracket and bracket are arranged on the opposite sides of the temporary support and the existing pier, which ensures the safety and adaptability of the structure. In addition, the design of the assembled adjusting beam can adjust the assembly height of the steel box girder according to specific requirements, which greatly facilitates the construction operation.

[0016] 2) The utility model discloses a pushing system including temporary support, front guide beam, and is equipped with jack and micro jack and other equipment, these equipment common action in steel box girder's pushing operation. Through reasonable connection and support design, the stability in the process of pushing is effectively guaranteed, so that the possibility of construction under complex conditions is greatly improved. Can effectively reduce the construction cost, shorten the construction period, and improve the safety of construction, has remarkable technical benefit.

[0017] 3) The utility model discloses guide beam system through setting built-in groove, reverse jack, and guide beam system can realize efficient connection and support in the process of jacking and pushing, ensure the stability of steel box girder in the construction process. Especially in the large height difference drop beam, utilize built-in jack and the collaborative action of pushing equipment, can realize the accurate control to steel box girder, ensure that it is safely and smoothly dropped to the predetermined position. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is assembly system schematic diagram;

[0019] Figure 2 It is pushing system schematic diagram;

[0020] Figure 3 It is pushed to temporary support schematic diagram;

[0021] Figure 4 It is pushed to permanent pier schematic diagram;

[0022] Figure 5 It is front guide beam schematic diagram;

[0023] Figure 6 It is cushion beam and temporary support schematic diagram.

[0024] Explanation of reference numerals in the attached diagram: 1. Existing pier; 2. Water level line; 3. Temporary support; 4. Pipe pile; 5. Support bracket; 6. Support support frame; 7. Pier top bracket; 8. Pier top frame; 9. Support rod; 10. Bottom support beam; 11. Support rod anchor bolt; 12. Top support beam; 13. Distribution beam; 14. Bailey bridge beam; 15. Bailey bridge beam anchor bolt; 16. Anchor bolt; 17. Base; 18. Assembled support; 19. Assembled adjustment beam; 20. Steel box girder; 21. Pile cap; 22. Pillar beam; 23. Main beam; 2 4. Jack; 25. Pad beam; 26. Fixed frame; 27. Movable frame; 28. Bottom pad plate; 29. ​​Connecting rod; 30. Top pad plate; 31. Miniature jack; 32. Front guide beam; 33. Guide beam boss; 34. Internal groove; 35. Internal jack; 36. Fixed end; 37. Horizontal fixing rod; 38. Vertical fixing rod; 39. Reverse pad beam; 40. Permanent pier; 41. Connecting frame; 42. First connecting block; 43. Hinge; 44. Connecting shaft; 45. Second connecting block. Detailed Implementation

[0025] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0026] As one example, such as Figures 1 to 6 As shown, this large-span, high-elevation-difference steel box girder launching system includes an assembly system, a launching system, and a guide beam system.

[0027] like Figure 1 As shown, the assembly system includes a steel box girder 20, an existing pier 1, temporary supports 3, and Bailey beams 14. Temporary supports 3 are installed on both sides of the existing pier 1. The temporary supports 3 include pipe piles 4, pile caps 21, sleeper beams 22, and main beams 23. Support brackets 5 and support frames 6 are installed on the opposite side of the temporary supports 3 and the existing pier 1. Pier top brackets 7 and pier top supports 8 are installed on both sides of the existing pier 1. Bottom support beams 10 are installed on the support frames 6 and pier top supports 8, and the bottom support beams 10 are located above the water level line 2. Intermittently arranged supports... The strut 9 is connected to the top support beam 12 via strut anchor bolts 11. The upper part of the strut 9 has a top support beam and a distribution beam 13. The distribution beam 13 has a Bailey beam 14. The two sides of the Bailey beam 14 are connected to the side supports via anchor bolts 16 and Bailey beam anchor bolts 15. The Bailey beam 14 has an assembly bracket 18. The bottom of the assembly bracket 18 has a base 17. The base 17 is located on the top surface of the Bailey beam 14. The top of the assembly bracket 18 has an assembly adjustment beam 19. The assembly adjustment beam 19 directly supports the steel box girder 20.

[0028] like Figures 2 to 4As shown, the pushing system includes temporary support 3, front guide beam 32, permanent pier 40, temporary support 3 is spaced on the pushing route, temporary support 3 has jack 24 on the main beam 23, jack 24 has cushion beam 25, cushion beam 25 has fixed frame 26 on one side, movable frame 27 is between two fixed frames 26, movable frame 27 has micro jack 31 and bottom cushion plate 28 at the bottom, movable frame 27 and the two sides of the fixed connection can be temporarily fixed by connecting rod 29, movable frame 27 has top cushion plate 30;

[0029] As shown in Figure 5 and Figure 6 , the guide beam system includes the front guide beam 32 of the front end of the steel box girder 20, the front part of the front guide beam 32 has a guide beam boss 33, the guide beam boss 33 has an embedded groove 34, the embedded groove 34 has an embedded jack 35 in the opposite direction, the embedded jack 35 and the guide beam boss 33 are connected by vertical fixed rods 38, horizontal fixed rods 37 and fixed ends 36, the embedded jack 35 is connected with the reverse cushion beam 39 by the connecting frame 41, the reverse cushion beam 39 is opposite to the cushion beam 25 on the temporary support 3, when jacking, the reverse cushion beam 39 and the cushion beam 25 are connected by the first connecting block 42, hinge 43, connecting shaft 44 and second connecting block 45, when pushing, the reverse cushion beam 39 and the cushion beam 25 are disconnected.

[0030] Based on the above assembly system, pushing system and guide beam system, the steel box girder 20 is assembled and manufactured on the assembly support 18, the assembly support 18 can adjust the height according to the assembly requirements of the steel box girder 20, after the assembly and manufacturing of the steel box girder 20 is completed, the guide beam system is installed at the front end of the steel box girder 20, and then the steel box girder 20 is pushed forward to the front temporary support 3 and the permanent pier 40 by using the pushing system; when the steel box girder 20 reaches the set position and the beam is dropped, the movable frame 27 and the fixed frame 26 are used as temporary support, the micro jack 31 at the bottom of the movable frame 27 adjusts to meet the set height requirement of the top cushion plate 30, the cushion beam 25 and the reverse cushion beam 39 are used for large height difference beam dropping, the embedded jack 35 and the jack 24 simultaneously act on each other to meet the demand of large height difference beam dropping.

Claims

1. A large-span and large-height-difference steel box girder pushing system, characterized in that, The existing pier, the assembling system, the pushing system, the guide beam system and the steel box girder are included. Temporary supports are arranged on both sides of the existing pier, a bottom beam is arranged between the temporary supports above the existing pier, the assembling system is arranged above the bottom beam, the steel box girder is assembled above the assembling system, the guide beam system is arranged at the front end of the steel box girder, temporary supports are arranged at intervals on the pushing route of the steel box girder, and the pushing system is arranged on the temporary supports on the pushing route of the steel box girder.

2. The long-span large-height-difference steel box girder pushing system according to claim 1, characterized in that, The assembling system includes the Bailey beam, the temporary support includes the pipe pile, the pile cap, the sleeper beam and the main beam, the opposite sides of the temporary support and the existing pier are provided with the support bracket and the support bracket, the top brackets and the support brackets are arranged on both sides of the existing pier, the bottom beam is arranged on the support bracket and the top bracket, and the bottom beam is located above the water level.

3. The long-span large-height-difference steel box girder pushing system according to claim 2, characterized in that, The bottom beam is arranged with the supporting rod at intervals, the supporting rod is connected with the bottom beam through the supporting rod anchor bolt, the upper part of the supporting rod is provided with the top beam and the distribution beam, the distribution beam is provided with the Bailey beam, the two sides of the Bailey beam are connected with the two temporary supports through the anchor rod and the Bailey beam anchor bolt, the Bailey beam is provided with the assembling support, the bottom of the assembling support is provided with the base, the base is located on the top surface of the Bailey beam, and the top of the assembling support is provided with the assembling adjusting beam, and the assembling adjusting beam directly bears the steel box girder.

4. The long-span large-height-difference steel box girder pushing system according to claim 1, characterized in that, The pushing system includes the temporary support, the front guide beam and the permanent pier, the temporary supports are arranged at intervals on the pushing route, the main beam of the temporary support is provided with the jack, the jack is provided with the cushion beam, one side of the cushion beam is provided with the fixed frame, the two fixed frames are provided with the movable frame, the bottom of the movable frame is provided with the micro jack and the bottom cushion plate, the movable frame and the two fixed frames are temporarily fixed by the connecting rod, and the movable frame is provided with the top cushion plate; the micro jack at the bottom of the movable frame is used for adjusting the height of the top cushion plate.

5. The long-span large-height-difference steel box girder pushing system according to claim 4, characterized in that, The guide beam system includes the front guide beam at the front end of the steel box girder, the front part of the front guide beam is provided with the guide beam boss, the guide beam boss is provided with the built-in groove, the built-in groove is provided with the reverse built-in jack, the built-in jack and the guide beam boss are connected by the vertical fixed rod, the horizontal fixed rod and the fixed end, the built-in jack is connected with the reverse cushion beam by the connecting frame, the reverse cushion beam is opposite to the cushion beam on the temporary support, when the steel box girder is jacked up, the reverse cushion beam and the cushion beam are movably connected by the first connecting block, the hinge, the connecting shaft and the second connecting block, and when the steel box girder is pushed, the reverse cushion beam and the cushion beam are disconnected.

6. The long-span large-height-difference steel box girder pushing system according to claim 4, characterized in that, The movable frame and the fixed frame are used for temporarily supporting the steel box girder, the micro jack at the bottom of the movable frame is used for adjusting the height of the top cushion plate, and the cushion beam and the reverse cushion beam are used for falling the beam with large height difference.

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