Bridge bottom main beam through-hole bottom holding device

Abstract

The application discloses a bridge bottom main beam hole passing bottom device, which comprises a bridge surface, two main beams arranged below the bridge surface, and a sliding bottom holding mechanism for supporting the main beams. The two main beams are horizontally and interval arranged and extend along the direction of the bridge surface. The sliding bottom holding mechanism comprises a supporting beam arranged below the main beam, a roller assembly rotationally connected with the supporting beam, and a hoisting assembly arranged relative to both ends of the supporting beam. The supporting beam is perpendicular to the main beam and transversely passes through the two main beams. The roller assembly is symmetrically arranged on both sides of the supporting beam and is rolling connected with the bottom of the main beam. One end of the hoisting assembly is connected with the bridge surface, and the other end of the hoisting assembly is connected with the supporting beam. When the main beam passes through the hole, the main beam is pulled and moved along the direction of the bridge surface, the roller assembly is rolling connected with the bottom of the main beam, and during the process, the supporting beam keeps supporting the main beam, so that the main beam is effectively prevented from excessively deflecting downward or losing stability and overturning, and the safety and stability of the movement are ensured.

Description

Technical Field

[0001] This invention relates to the field of bridge construction equipment technology, and in particular to a bottom support device for the main beam passing through the hole at the bottom of a bridge. Background Technology

[0002] The process of the main girder (integrated support) passing through the arch refers to the process where a large, integrated steel main girder structure, supported under the bridge deck and used to bear formwork or construction loads, needs to be moved forward as a whole to cross the piers and reach the next construction segment after the completion of a section of bridge construction. The main girder typically moves forward in a walking motion, driven by towing or pushing, and relies on front, middle, and rear outriggers pre-installed on the main girder for alternating support and movement. When the main girder passes through the arch, its front end extends outwards, and the overall structure acts like a giant lever. The weight of the main girder and the construction loads will generate a huge overturning moment and cantilever deflection. Therefore, a bottom support device needs to be installed on the main girder to provide additional support, effectively resisting the moment, preventing excessive deflection or instability and overturning, and ensuring a smooth and safe movement to the next work position. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a bottom support device for the main beam under a bridge.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A bridge under-girder span support device includes a bridge deck, two main beams located below the bridge deck, and a sliding span support mechanism for supporting the main beams. The two main beams are horizontally spaced and extend along the bridge deck.

[0006] The sliding bottom support mechanism includes a support beam located below the main beam, a roller assembly rotatably connected to the support beam, and a hoisting assembly located at both ends of the support beam. The support beam is perpendicular to the main beam and is laterally connected to both main beams. The roller assembly is symmetrically located on both sides of the support beam and is rotatably connected to the bottom of the main beam. One end of the hoisting assembly is connected to the bridge deck, and the other end of the hoisting assembly is connected to the support beam.

[0007] Preferably, the support beam includes roller lugs on both sides and roller shafts inserted into the roller lugs. The roller assembly is sleeved on the outside of the roller shaft and rotatably connected to the roller shaft.

[0008] Preferably, the roller assembly includes a bushing disposed between the roller lug and the roller shaft, and a bottom roller sleeved on the outside of the roller shaft. The bottom roller has stepped annular grooves on the inner sides of both ends, and bearings are embedded in the annular grooves. The bottom roller is rotatably connected to the roller shaft through the bearings, and the outer side of the bottom roller is rolledly connected to the bottom of the main beam.

[0009] Preferably, the support beam is provided with an upwardly extending clamping plate and lifting lugs located at both ends of the support beam. The clamping plate is provided on both sides of the main beam, and the lifting lugs are connected to the lifting assembly.

[0010] Preferably, the hoisting assembly includes a hoisting head connected to the hoisting lug, a fixing block connected to the bridge deck, and a sling connected between the hoisting head and the fixing block. A fastening assembly is provided between the fixing block and the sling, and the sling is connected to the fixing block through the fastening assembly.

[0011] Preferably, the fastening assembly includes an adjusting plate disposed above the fixed block and a jack disposed between the fixed block and the adjusting plate. The adjusting plate and the fixed block are respectively provided with vertical through holes. The sling passes through the through holes upward and is fitted with a fastening head at the upper end. The sling is suspended from the adjusting plate through the fastening head.

[0012] Preferably, the bridge deck is provided with a guide rail in the same direction as the main beam, and a guide beam is provided horizontally above the guide rail. The guide beam is arranged parallel to the support beam and is slidably connected to the guide rail. The fixing block is detachably connected to the guide beam.

[0013] Preferably, the card plate is fitted with a retractable auxiliary shaft, one end of which is positioned towards the main beam and is rotatably connected to an auxiliary wheel, which is in rolling connection with the inner side of the main beam.

[0014] Preferably, the other end of the auxiliary shaft is provided with a limiting ring, which is disposed relative to the outside of the clamping plate and movably abuts against the clamping plate. The auxiliary shaft is provided with two stop holes, which are disposed relative to the two sides of the limiting ring. A limiting pin is connected between the clamping plate and the stop holes.

[0015] The present invention has the following beneficial effects:

[0016] This invention installs a sliding bottom support mechanism under the bridge deck. The support beam is connected to the bridge deck through a hoisting assembly, thereby supporting the main beam. When the main beam passes through the arch under the bridge, it is pulled and moved along the direction of the bridge deck. The roller assembly is rolled and connected to the bottom of the main beam. During this period, the support beam maintains its supporting state for the main beam, effectively preventing the main beam from excessively deflecting or becoming unstable and overturning, and ensuring the safety and stability of the movement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the bridge under-girder through-hole support device described in this invention;

[0018] Figure 2 This is a schematic diagram of the sliding bottom support mechanism described in this invention;

[0019] Figure 3 This is a schematic diagram of the supporting beam described in this invention;

[0020] Figure 4This is a schematic diagram of the auxiliary wheel described in this invention;

[0021] Figure 5 This is a schematic diagram of the roller assembly described in this invention;

[0022] Figure 6 This is a schematic diagram of the hoisting assembly described in this invention.

[0023] Attached diagram descriptions: Bridge deck 1, main beam 2, support beam 30, roller lug 31, roller shaft 32, clamping plate 33, lifting lug 34, auxiliary shaft 35, auxiliary wheel 36, limiting ring 37, limiting pin 38, roller assembly 40, bushing 41, bottom roller 42, bearing 43, lifting assembly 50, lifting head 51, fixing block 52, sling 53, adjusting plate 54, jack 55, fastening head 56, guide rail 57, guide beam 58. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Reference Figures 1 to 6 One embodiment provided by the present invention:

[0026] A bridge under-girder span support device includes a bridge deck 1, two main beams 2 located below the bridge deck 1, and a sliding support mechanism for supporting the main beams 2. The two main beams 2 are horizontally spaced and extend along the direction of the bridge deck 1. The sliding support mechanism includes a support beam 30 located below the main beams 2, a roller assembly 40 rotatably connected to the support beam 30, and a hoisting assembly 50 located at both ends of the support beam 30. The support beam 30 is perpendicular to the main beams 2 and is arranged laterally through the two main beams 2. The roller assembly 40 is symmetrically arranged on both sides of the support beam 30 and is rotatably connected to the bottom of the main beams 2. One end of the hoisting assembly 50 is connected to the bridge deck 1, and the other end of the hoisting assembly 50 is connected to the support beam 30.

[0027] Bridge deck 1 is horizontally positioned. Main beams 2 are located below and parallel to bridge deck 1, with two main beams 2 horizontally spaced and extending along the direction of bridge deck 1. A sliding bottom support mechanism supports the main beams 2. Support beams 30 are located below the main beams 2, perpendicular to them, and transversely pass through the two main beams 2. Support beams 30 abut against the bottom of the main beams 2 via roller assemblies 40, providing support. Roller assemblies 40 are rotatably connected to support beams 30 and symmetrically positioned on both sides of support beams 30. When the main beams 2 are pulled and moved along the direction of bridge deck 1, roller assemblies 40 roll in contact with the bottom of the main beams 2. Lifting assemblies 50 are positioned relative to both ends of the support beams 30. One end of the lifting assembly 50 is connected to bridge deck 1, and the other end is connected to the support beams 30.

[0028] The present invention installs a sliding bottom support mechanism under the bridge deck 1. The support beam 30 is connected to the bridge deck 1 through the hoisting assembly 50, thereby supporting the main beam 2. When the main beam 2 passes through the hole at the bottom of the bridge, the main beam 2 is pulled and moved along the direction of the bridge deck 1. The roller assembly 40 is rolled and connected to the bottom of the main beam 2. During this period, the support beam 30 maintains the support state for the main beam 2, effectively preventing the main beam 2 from excessively deflecting or becoming unstable and overturning, and ensuring the safety and stability of the movement.

[0029] In this embodiment, preferably, the support beam 30 includes roller ears 31 on both sides and roller shafts 32 inserted into the roller ears 31. The roller assembly 40 is sleeved on the outside of the roller shaft 32 and is rotatably connected to the roller shaft 32.

[0030] Roller lug 31 is located in the middle of support beam 30 and matches with roller assembly 40. Roller shaft 32 is inserted into roller lug 31. Roller assembly 40 is sleeved on the outside of roller shaft 32 and rotatably connected to roller shaft 32. Specifically, roller lug 31, roller shaft 32, and roller assembly 40 are configured as two sets corresponding to the two main beams 2, further improving the fit between support beam 30 and main beam 2, making the movement of main beam 2 more stable.

[0031] In this embodiment, preferably, the roller assembly 40 includes a bushing 41 disposed between the roller lug 31 and the roller shaft 32, and a bottom roller 42 sleeved on the outside of the roller shaft 32. The bottom roller 42 has stepped annular grooves on the inner sides of both ends, and bearings 43 are embedded in the annular grooves. The bottom roller 42 is rotatably connected to the roller shaft 32 through the bearings 43, and the outer side of the bottom roller 42 is rolledly connected to the bottom of the main beam 2.

[0032] The bushing 41 is located between the roller lug 31 and the roller shaft 32, and is fitted onto the outside of the roller shaft 32. The roller shaft 32 is connected to the roller lug 31 through the bushing 41. The bottom roller 42 is fitted onto the outside of the roller shaft 32 and is matched with the bottom of the main beam 2. The annular groove is located on the inner side of both ends of the bottom roller 42 and has a stepped structure. The bearing 43 is embedded in the annular groove. The bottom roller 42 is rotatably connected to the roller shaft 32 through the bearing 43. The outside of the bottom roller 42 is in rolling connection with the bottom of the main beam 2.

[0033] In this embodiment, preferably, the support beam 30 is provided with an upwardly extending clamping plate 33 and lifting lugs 34 located at both ends of the support beam 30. The clamping plate 33 is provided on both sides of the main beam 2, and the lifting lugs 34 are connected to the lifting assembly 50.

[0034] The clamping plate 33 is located above the support beam 30, extending upwards and positioned on both sides of the main beam 2. It is aligned with both ends of the roller assembly 40, providing a limiting function for the support beam 30 and ensuring that the roller assembly 40 is aligned with the bottom of the main beam 2. The lifting lug 34 is located above the support beam 30, extending upwards and positioned at both ends of the support beam 30, and is connected to the lifting assembly 50.

[0035] In this embodiment, preferably, the hoisting assembly 50 includes a hoisting head 51 connected to the hoisting lug 34, a fixing block 52 connected to the bridge deck 1, and a sling 53 connected between the hoisting head 51 and the fixing block 52. A fastening assembly is provided between the fixing block 52 and the sling 53, and the sling 53 is connected to the fixing block 52 through the fastening assembly.

[0036] The lifting head 51 is located above the lifting lug 34 and vertically aligned with it. A lifting rod is inserted into the lifting head 51, and the lifting head 51 is connected to the lifting lug 34 via the lifting rod. The fixing block 52 is connected to the bridge deck 1. The upper end of the sling 53 is connected to the fixing block 52, and the lower end of the sling 53 is connected to the lifting head 51. A fastening assembly is located between the fixing block 52 and the sling 53, and has a lifting adjustment function to adjust the tightness between the fixing block 52 and the sling 53. The sling 53 is connected to the fixing block 52 via the fastening assembly.

[0037] In this embodiment, preferably, the fastening assembly includes an adjusting plate 54 disposed above the fixing block 52, and a jack 55 disposed between the fixing block 52 and the adjusting plate 54. The adjusting plate 54 and the fixing block 52 are respectively provided with vertical through holes. The sling 53 passes through the through holes upward and is fitted with a fastening head 56 at its upper end. The sling 53 is suspended from the adjusting plate 54 through the fastening head 56.

[0038] The adjusting plate 54 is located above the fixed block 52, and the jack 55 is located between the fixed block 52 and the adjusting plate 54. The distance between the fixed block 52 and the adjusting plate 54 can be adjusted by the lifting and adjusting function of the jack 55. The adjusting plate 54 and the fixed block 52 are respectively provided with vertical through holes, and the holes of the two are vertically aligned. The upper end of the sling 53 passes through the through hole and extends upward, and a fastening head 56 is sleeved at the extended position. The sling 53 is suspended from the adjusting plate 54 through the fastening head 56. The adjusting plate 54 is lifted by the jack 55, which drives the fastening head 56 to move upward, thereby tightening the sling 53 and achieving the effect of fastening the connection.

[0039] In this embodiment, preferably, a guide rail 57 in the same direction as the main beam 2 is provided above the bridge deck 1, and a guide beam 58 is horizontally arranged above the guide rail 57. The guide beam 58 is arranged parallel to the support beam 30 and is slidably connected to the guide rail 57. The fixing block 52 is detachably connected to the guide beam 58.

[0040] Two guide rails 57 are located above the bridge deck 1, arranged horizontally at intervals, and aligned with the main beam 2. A guide beam 58 is positioned above the guide rails 57, passing laterally through both guide rails 57. The guide beam 58 is parallel to the support beam 30 and slidably connected to the guide rails 57. Fixing blocks 52 on both sides of the bridge deck 1 are detachably connected to both ends of the guide beam 58. When the support beam 30 needs to be fixed, the fixing blocks 52 are connected to the bridge deck 1 to provide support for the support beam 30. When the support beam 30 needs to be adjusted, the fixing blocks 52 are disconnected from the bridge deck 1 and instead connected to both ends of the guide beam 58. The guide beam 58 slides along the guide rails 57, thereby adjusting the relative position of the support beam 30 and the bridge deck 1.

[0041] In this embodiment, preferably, the card plate 33 is fitted with a retractable auxiliary shaft 35, one end of which is set towards the main beam 2 and is rotatably connected to an auxiliary wheel 36, which is rolledly connected to the inner side of the main beam 2.

[0042] The clamping plate 33 has its inner side facing the main beam 2 as its inner side. An auxiliary shaft 35 is inserted into the clamping plate 33, with both ends extending relative to the clamping plate 33. The auxiliary shaft 35 is slidably connected to the clamping plate 33, allowing it to extend and retract relative to the clamping plate 33. One end of the auxiliary shaft 35 is located inside the clamping plate 33, pointing towards the main beam 2, and is rotatably connected to an auxiliary wheel 36. The auxiliary wheel 36 is rolledly connected to the inner side of the main beam 2. Alternatively, the main beam 2 can be an I-beam structure with a groove on its inner side. The auxiliary wheel 36 is rolledly connected to the lower end of the groove, forming upper and lower limits with the roller assembly 40 below the main beam 2. This helps prevent the support beam 30 from falling and improves the stability of the main beam 2's movement.

[0043] In this embodiment, preferably, the other end of the auxiliary shaft 35 is provided with a limiting ring 37. The limiting ring 37 is disposed on the outside of the clamping plate 33 and is in movable contact with the clamping plate 33. The auxiliary shaft 35 is provided with two stop holes, which are disposed on both sides of the limiting ring 37. A limiting pin 38 is connected between the clamping plate 33 and the stop holes.

[0044] The clamping plate 33 is positioned with its side facing away from the main beam 2 as the outer side. A limiting ring 37 is located at the other end of the auxiliary shaft 35, positioned relative to the outer side of the clamping plate 33. The limiting ring 37 movably abuts against the clamping plate 33, providing a travel limit for the auxiliary shaft 35. After the support beam 30 is installed, when the auxiliary shaft 35 extends, the auxiliary wheel 36 contacts the inner side of the main beam 2, preventing it from falling. When the support beam 30 needs to be disassembled, the auxiliary wheel 36 separates from the inner side of the main beam 2 when the auxiliary shaft 35 retracts, providing clearance. Two stop holes are located on the auxiliary shaft 35, positioned on both sides relative to the limiting ring 37. The limiting holes are located on the clamping plate 33, corresponding to the stop holes. The stop holes and limiting holes are connected by limiting pins 38, fixing the clamping plate 33 to the auxiliary shaft 35 and thus controlling the extension and retraction distance of the auxiliary shaft 35.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bottom-support device for a bridge under-span main beam, comprising a bridge deck, two main beams located below the bridge deck, and a sliding bottom-support mechanism for supporting the main beams, wherein the two main beams are horizontally spaced apart and extend along the bridge deck direction, characterized in that: The sliding bottom support mechanism includes a support beam located below the main beam, a roller assembly rotatably connected to the support beam, and a hoisting assembly set at both ends of the support beam. The support beam is perpendicular to the main beam and is set laterally through the two main beams. The roller assembly is symmetrically located on both sides of the support beam and is rotatably connected to the bottom of the main beam. One end of the hoisting assembly is connected to the bridge deck, and the other end of the hoisting assembly is connected to the support beam. The support beam is provided with an upwardly extending clamping plate and lifting lugs located at both ends of the support beam. The clamping plate is arranged opposite to both sides of the main beam, and the lifting lugs are connected to the lifting assembly. The clamping plate is fitted with a telescopic auxiliary shaft. One end of the auxiliary shaft is arranged towards the main beam and is rotatably connected to an auxiliary wheel. The auxiliary wheel is rolledly connected to the inner side of the main beam. The other end of the auxiliary shaft is provided with a limiting ring. The limiting ring is arranged opposite to the outer side of the clamping plate and movably abuts against the clamping plate. The auxiliary shaft is provided with two stop holes, which are arranged opposite to both sides of the limiting ring. A limiting pin is connected between the clamping plate and the stop holes. The main beam is an I-beam structure with a groove on its inner side. The auxiliary wheel is rolled to the lower end of the groove and forms an upper and lower limit with the roller assembly below the main beam, which helps to prevent the support beam from falling.

2. The underpass device for the main beam of a bridge as described in claim 1, characterized in that: The support beam includes roller lugs on both sides and roller shafts inserted into the roller lugs. The roller assembly is sleeved on the outside of the roller shaft and is rotatably connected to the roller shaft.

3. The underpass device for the main beam of a bridge as described in claim 2, characterized in that: The roller assembly includes a bushing located between the roller lug and the roller shaft, and a bottom roller sleeved on the outside of the roller shaft. The bottom roller has stepped annular grooves on the inner sides of both ends, and bearings are embedded in the annular grooves. The bottom roller is rotatably connected to the roller shaft through the bearings, and the outer side of the bottom roller is rollingly connected to the bottom of the main beam.

4. The underpass device for the main beam of a bridge as described in claim 1, characterized in that: The hoisting assembly includes a hoisting head connected to the lifting lugs, a fixing block connected to the bridge deck, and a sling connected between the hoisting head and the fixing block. A fastening assembly is provided between the fixing block and the sling, and the sling is connected to the fixing block through the fastening assembly.

5. The underpass device for the main beam of a bridge as described in claim 4, characterized in that: The fastening assembly includes an adjusting plate located above the fixed block and a jack located between the fixed block and the adjusting plate. The adjusting plate and the fixed block are respectively provided with vertical through holes. The sling passes through the through holes upward and is fitted with a fastening head at the upper end. The sling is suspended from the adjusting plate through the fastening head.

6. The underpass device for the main beam of a bridge as described in claim 5, characterized in that: The bridge deck is provided with a guide rail that runs in the same direction as the main beam, and a guide beam that runs horizontally above the guide rail. The guide beam is parallel to the support beam and is slidably connected to the guide rail. The fixing block is detachably connected to the guide beam.

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