Bailey beam integral unloading tool

Abstract

The utility model provides a bailey beam integral unloading tool which comprises first I-shaped steel capable of abutting against a beam body, the first I-shaped steel is connected with a jack, the bailey beam integral unloading tool further comprises a screw penetrating through the first I-shaped steel, and the screw is in threaded connection with a lower nut and an upper nut which are located on the two sides of the jack. The device is convenient to operate, the whole bailey beam support is unloaded to the ground for disassembly through the screw, the safety and work efficiency of support disassembly are greatly improved, the construction cost is reduced, the economic benefits are improved, the applicability is high, various difficulties of terrain limitation and operation space limitation are overcome, and the device is efficient and safe.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a tool for the overall unloading of Bailey bridge beams. Background Technology

[0002] With the increase in infrastructure construction, Bailey bridge supports are widely used in construction projects due to their simple structure, convenient transportation, quick erection, large load capacity, good interchangeability, and strong adaptability. However, in the dismantling process of some bridge support projects, due to site and construction environment limitations, dismantling the supports is difficult, and high-altitude operations pose high construction risks. To address these issues, there are currently no easy-to-use tools that can effectively achieve the overall unloading of Bailey bridges. Utility Model Content

[0003] To address the problems existing in the prior art, a Bailey beam whole-unit unloading tool is provided. This device is easy to operate, using screws to unload the Bailey beam support as a whole to the ground for dismantling, greatly improving the safety and efficiency of support dismantling, reducing construction costs, increasing economic benefits, and having strong applicability. It overcomes various difficulties such as terrain limitations and working space limitations, and is highly efficient and safe.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] This utility model proposes a Bailey beam overall unloading tool, including a first I-beam that can abut against the beam body, the first I-beam being connected to a jack, and a screw rod passing through the first I-beam, the screw rod being threadedly connected to a lower nut and an upper nut located on both sides of the jack.

[0006] Preferably, the jack includes a piston, the piston is detachably connected to a pad, the pad has a through hole for the screw to pass through freely, and the outer diameter of the upper nut is larger than the diameter of the through hole.

[0007] Preferably, it also includes a plate inserted into the screw, the plate having a slot into which the screw slides, and the outer diameter of the lower nut being larger than the width of the slot.

[0008] Preferably, a third I-beam is welded to the bottom end of the Bailey beam, and a support plate is welded to the bottom end of the third I-beam.

[0009] Preferably, the screw is threadedly connected to a support nut capable of supporting the support plate, and at least two support nuts are provided.

[0010] Preferably, the screw is also connected to a connector for connecting adjacent screws.

[0011] Preferably, it also includes a second I-beam abutting against the beam, the second I-beam being welded to the first I-beam, and the second I-beam being welded with a connecting plate.

[0012] Preferably, the insert plate abuts against the second I-beam, and the second I-beam and the first I-beam are arranged perpendicularly.

[0013] Preferably, it also includes a double I-beam located between the first I-beam and the jack, with one end of the double I-beam connected to the jack and the other end of the double I-beam connected to the first I-beam.

[0014] Preferably, the insert plate abuts against the beam, and the double-I-beam and the first I-beam are arranged perpendicularly.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model is equipped with a screw rod, which is used to unload the entire Bailey beam support to the ground for dismantling. This greatly improves the safety and efficiency of support dismantling, reduces construction costs, and increases economic benefits. By combining jacks and screw rods, the entire Bailey beam support is unloaded to the ground for dismantling through a lifting method, which solves the difficulties and hoisting risks of high-altitude operations in the past when dismantling Bailey beam supports.

[0017] 2. The device for the overall dismantling of Bailey beam supports proposed in this utility model effectively solves the problems of great difficulties and high safety risks faced in Bailey beam dismantling operations. It has strong applicability, overcomes various difficulties such as terrain restrictions and working space restrictions, is highly efficient and safe, has high practicality and good advanced features, and can greatly improve construction efficiency and reduce construction costs. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is the overall front view in Embodiment 1;

[0020] Figure 2 yes Figure 1 Schematic diagram of the first I-beam section;

[0021] Figure 3 This is the overall workflow in Example 1. Figure 1 ;

[0022] Figure 4 This is the overall workflow in Example 1. Figure 2 ;

[0023] Figure 5This is the overall workflow in Example 1. Figure 3 ;

[0024] Figure 6 This is the overall workflow in Example 1. Figure 4 ;

[0025] Figure 7 yes Figure 2 Schematic diagram of the middle insert plate structure;

[0026] Figure 8 This is the overall front view in Embodiment 2.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Jack; 2. Pad; 3. Upper nut; 4. First I-beam; 5. Steel plate; 6. Lower nut; 7. Insert plate; 71. Slot; 8. Second I-beam; 9. Connecting plate; 10. Bailey beam; 11. Third I-beam; 12. Support plate; 13. Support nut; 14. Connector; 15. Connecting angle steel; 16. Double-jointed I-beam; 17. Beam body; 18. Screw rod. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] Example 1

[0031] like Figures 1-7 As shown, this embodiment proposes a Bailey beam overall unloading tool, including a first I-beam 4 that can abut against the beam 17, a jack 1 connected to the first I-beam 4, and a screw 18 that passes through the first I-beam 4. The screw 18 is threadedly connected to a lower nut 6 and an upper nut 3 located on both sides of the jack 1. The screw 18, the lower nut 6 and the upper nut 3 are all made of precision rolled threaded steel.

[0032] Jack 1 is a through-type jack with a capacity of not less than 20t, mainly used for overall tensioning of group anchors. This jack is simple to operate, reliable in performance, and saves steel strand to the maximum extent. Jack 1 is detachably connected to the first I-beam 4 by bolts.

[0033] The jack 1 includes a piston, and the piston is detachably connected to a pad 2 by bolts. The pad 2 can abut against the upper nut 3. The pad 2 has a through hole for the screw 18 to pass through freely. The outer diameter of the upper nut 3 is larger than the diameter of the through hole.

[0034] It also includes a plate 7 inserted into the screw 18. The plate 7 has a slot 71 for the screw 18 to slide into. The outer diameter of the lower nut 6 is larger than the width of the slot 71. The slot 71 is an open structure at one end. The plate 7 can be set below the lower nut 6. The plate 7 supports the lower nut 6. There are at least two lower nuts 6.

[0035] The bottom end of the Bailey beam 10 is welded with a third I-beam 11, and the bottom end of the third I-beam 11 is welded with a support plate 12. The screw 18 is threaded with a support nut 13 that can support the support plate 12, and at least two support nuts 13 are provided.

[0036] The support nut 13 is made of precision rolled threaded steel, and the exposed length of the screw 18 is not less than 10cm.

[0037] The screw 18 is also connected to a connector 14 for connecting adjacent screws 18. The connector 14 is used to connect two adjacent screw sections 18. When the length of a single screw 18 is insufficient, it is extended by using a precision rolled thread steel connector 14. It is necessary to extend the two precision rolled thread steel sections that need to be extended.

[0038] It also includes a second I-beam 8 that abuts against the beam 17. The second I-beam 8 is welded to the first I-beam 4. The second I-beam 8 is welded with a connecting plate 9. The insert plate 7 abuts against the second I-beam 8. The second I-beam 8 and the first I-beam 4 are set perpendicularly. The setting of the second I-beam 8 is used to balance the force and better support the whole.

[0039] The Bailey beam 10 is dismantled by lowering it to the ground using screw 18, which greatly improves the safety and efficiency of the support dismantling, reduces construction costs, and increases economic benefits. By combining jack 1 and screw 18, the entire Bailey beam 10 is lowered to the ground for dismantling through lifting, which solves the difficulties and hoisting risks of high-altitude operations in the previous Bailey beam 10 dismantling.

[0040] Example 2

[0041] Reference Appendix Figure 8 The other structures are the same as in Embodiment 1. The difference is that in this embodiment, a double I-beam 16 is also included between the first I-beam 4 and the jack 1. One end of the double I-beam 16 is connected to the jack 1, and the other end of the double I-beam 16 is connected to the first I-beam 4.

[0042] The bottom end of the double-I-beam 16 is welded with a connecting angle steel 15. The lower end of the connecting angle steel 15 is welded to the first I-beam 4. The insert plate 7 abuts against the beam 17. The double-I-beam 16 and the first I-beam 4 are set perpendicularly. The double-I-beam 16 plays a role in balancing the force and providing better overall support.

[0043] The device for the overall lowering of Bailey bridge supports effectively solves the problems of great difficulties and high safety risks faced in Bailey bridge dismantling operations. It is highly applicable, overcomes various difficulties such as terrain limitations and working space limitations, is highly efficient and safe, has high practicality and good advanced technology, and can greatly improve construction efficiency and reduce construction costs.

[0044] When using the tool, the process includes rotating the upper nut 3 to 3 / 4 of the stroke of the hydraulic cylinder of jack 1, raising jack 1 to 1 / 4 of the stroke of the lower nut 6, so that the lower nut 6 is no longer under force, turning the lower nut 6 upward to 3 / 4 of the stroke of the hydraulic cylinder of jack 1, and lowering jack 1 to 6 under force, completing one cycle of lowering.

[0045] The specific work process is as follows:

[0046] Bracket locking:

[0047] The supports can only be removed after the concrete of the beam reaches the demolding strength and tensioning and grouting are completed. First, the side formwork of the box girder is removed, the screw rod 18 is inserted into the pre-embedded steel pipe, and the jack 1 and the pad plate 2 on the jack 1 are installed. The bottom of the screw rod 18 passes through the third I-beam 11. The third I-beam 11 is locked with a double nut by the support nut 13. Then the lower nut 6 on the second I-beam 8 is fixed. At this time, the Bailey beam 10 and the I-beam are fixed on the beam 17.

[0048] Removal of loose blocks:

[0049] After the Bailey beam 10 and the I-beam are fixed and locked to the beam body 17, the unloading blocks are removed. The unloading blocks are removed in the following order: first remove the unloading blocks at the side piers, and then remove the unloading blocks at the middle support piers.

[0050] Dismantle the steel pipe support:

[0051] First, remove the scissor bracing and horizontal truss connecting members between the steel pipe supports. Then, remove the connection between the bottom of the steel pipe column and the embedded steel plate. Use a truck crane to lift away the dismantled steel pipe supports one by one, following the principle of "removing one and lifting it away one by one".

[0052] The first stage involves unloading 1.8m:

[0053] After all the steel pipe columns have been dismantled and transported away, the Bailey beam can be lowered to 1.8m. First, rotate the upper nut 3 on jack 1 so that both jacks 1 extend 4 / 5 of their lengths simultaneously. Jack 1 should slightly push the screw 18 to loosen the double-layer lower nut 6 on the top surface of the beam. Then loosen the double-layer lower nut 6, ensuring that the loosening length does not exceed the length of the jack 1's descent. Jack 1 must descend slowly and simultaneously. All jacks 1 on the same span of the cast-in-place beam should be operated simultaneously, with a descent rate of one cycle every 3 minutes. Each cycle should lower the beam by 15cm, and the descent should not exceed 3m per hour. The descent should be simultaneous, and the height difference between the jacks should not exceed 2cm. This cycle should be repeated until the jacks 1 and the double-layer nuts are tightly engaged, allowing the Bailey beam to descend to 1.8m and lock.

[0054] When the length of a single 1.3m screw 18 is insufficient, a precision threaded steel connector 14 is used to extend it. The two sections of precision threaded steel that need to be extended should be marked with paint to indicate the length of 1 / 2 connector 14, ensuring that the two sections are evenly connected to the connector 14 of uniform length.

[0055] A temporary work platform was laid on the upper part of the Bailey beam using bamboo plywood, and manual cleaning was carried out to remove the bamboo plywood that could not be removed from the bottom plate of the box girder.

[0056] The second stage involves removing the equipment from its original ground position.

[0057] Temporary supports were erected on the original ground at both ends of the transverse distribution beam using I-beams or square timber. The first stage of unloading operation was repeated. Jack 1 and double-layer nuts were tightly engaged to lower Bailey beam 10 to the temporary supports. Truck cranes and flatbed trucks were used to transport it to the next construction section.

[0058] Seal the reserved holes:

[0059] After all Bailey beams 10 have been removed, the reserved holes on the cast-in-place beams should be sealed with C50 shrinkage-compensating high-strength concrete.

[0060] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A beam end integral knock-off tool characterised in that, The utility model provides a kind of beam jacking device, including the first I-beam (4) capable of abutting on beam body (17), the first I-beam (4) is connected with jack (1), further including screw rod (18) through the first I-beam (4), the screw rod (18) is screw connected with lower nut (6) and upper nut (3) located on both sides of jack (1).

2. A beam launching and landing tool according to claim 1, wherein, The jack (1) includes a piston, the piston is detachably connected with a backing plate (2), the backing plate (2) is provided with a through hole for the screw rod (18) to freely pass through, and the outer diameter of the upper nut (3) is greater than the hole diameter of the through hole.

3. A beam launching and landing tool according to claim 1, wherein, Further comprising a plugboard (7) inserted into the screw rod (18), the plugboard (7) is provided with a slot (71) for the screw rod (18) to slide into, and the outer diameter of the lower nut (6) is greater than the width of the slot (71).

4. A beam launching and landing tool according to claim 1, wherein, The bottom end of the bailey beam (10) is welded with a third I-beam (11), and the bottom end of the third I-beam (11) is welded with a support plate (12).

5. A beam launching and landing tool according to claim 4, wherein, The screw rod (18) is screw connected with a support nut (13) capable of receiving the support plate (12), and the support nut (13) is provided with at least two.

6. A beam launching and landing tool according to claim 1, wherein, The screw rod (18) is further connected with a connector (14) for connecting adjacent screw rods (18).

7. A beam launching and landing tool according to claim 3, wherein Further comprising a second I-beam (8) abutting on the beam body (17), the second I-beam (8) is welded with the first I-beam (4), and the second I-beam (8) is welded with a connecting plate (9).

8. A beam launching and landing tool according to claim 7, wherein, The plugboard (7) abuts on the second I-beam (8), and the second I-beam (8) and the first I-beam (4) are vertically arranged.

9. A beam launching and landing tool according to claim 3, wherein, Further comprising a double-spliced I-beam (16) between the first I-beam (4) and the jack (1), one end of the double-spliced I-beam (16) is connected with the jack (1), and the other end of the double-spliced I-beam (16) is connected with the first I-beam (4).

10. A beam launching and landing tool according to claim 9, wherein, The plugboard (7) abuts on the beam body (17), and the double-spliced I-beam (16) and the first I-beam (4) are vertically arranged.

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