Bailey beam integral beam falling device

Abstract

The utility model discloses an integral bailey beam falling device, and belongs to the technical field of bridge construction. The overall bailey beam falling device comprises a hanging bracket mechanism and a power mechanism which are mounted on a bridge floor, the hanging bracket mechanism comprises stand columns, a fixed cross beam connected between the two stand columns, a hanging rod arranged in the fixed cross beam in a penetrating mode and connected with the fixed cross beam, and a movable cross beam located below the fixed cross beam and connected with the hanging rod. The power mechanism comprises at least one jacking mechanism installed on the bridge floor, and the output end of the jacking mechanism abuts against the movable cross beam. Wherein the suspender penetrates through the bridge floor and is connected with the bailey beam. The whole bailey beam falling device is simple in structure, safe, reliable, rapid in construction and high in mechanization degree, and the problems of low safety, low efficiency and large influence on the surrounding environment existing in a traditional bailey beam dismantling scheme can be well solved by adopting a whole-hole falling mode for beam falling.

Description

Technical Field

[0001] The utility model relates to a Bailey beam integral beam dropping device, belonging to the technical field of bridge construction. Background Art

[0002] Bailey beams are often used in the construction of large-span bridges because of their rapid erection, strong mobility, flexible structure, large bearing capacity, easy disassembly and assembly, and can be reused many times. When a new bridge needs to cross a highway with a particularly large traffic volume, a large-span frame structure must be used to ensure smooth traffic. At this time, Bailey beams can be used as the support of the bridge box girder formwork, on which the box girder formwork is installed, prestressed, steel bars are installed, and concrete is poured. When the concrete strength of the box girder reaches the relevant standards and the prestressing is completed, the box girder can be dismantled.

[0003] Traditional demolition requires cranes to cooperate with manual operations, and the demolition is carried out in multiple sections. The workers' working surface is located on the Bailey beam, which involves high-altitude operations and hot work. The demolition needs to be strictly carried out in accordance with relevant regulations. Once illegal commands and illegal operations occur, safety accidents are likely to occur. The traditional demolition of Bailey beams requires a lot of manpower and time, which seriously affects the construction progress. In addition, because urban road elevated sections, urban rail elevated sections and subway elevated sections often pass through areas with dense urban buildings, the construction site is small, the space for crane operation is limited, and there is insufficient space for lifting the Bailey beam at the bottom of the beam. The conventional demolition plan cannot meet the construction requirements. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes a Bailey beam integral lowering device, which has a simple structure, is safe and reliable, has fast construction, and a high degree of mechanization. The whole-hole lowering method is used to lower the beam, which can effectively solve the problems of low safety, low efficiency, and great impact on the surrounding environment in the traditional Bailey beam dismantling scheme.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A Bailey beam integral lowering device comprises a hanger mechanism and a power mechanism installed on a bridge deck, wherein the hanger mechanism comprises a column, a fixed beam connected between two of the columns, a hanger rod passing through the fixed beam and connected thereto, and a movable beam located below the fixed beam and connected to the hanger rod; the power mechanism comprises at least one jacking mechanism installed on the bridge deck, the output end of the jacking mechanism abuts against the movable beam; wherein the hanger rod passes through the bridge deck and is connected to the Bailey beam.

[0007] In one embodiment of the present invention, it further comprises a control system connected to the lifting mechanism of the power mechanism, wherein the control system is used to control the lifting mechanism to perform lifting.

[0008] In one embodiment of the present invention, the control system includes a monitoring sensor.

[0009] In one implementation of the utility model, the lifting mechanism includes a hydraulic jack or an electric pump.

[0010] In one implementation of the utility model, when the lifting mechanism adopts a hydraulic jack, the control system adopts a PLC hydraulic control system.

[0011] In one embodiment of the utility model, the suspension rod is provided with a nut for limiting the position of the fixed crossbeam and the movable crossbeam.

[0012] In an embodiment of the present utility model, four of the hanger mechanisms and the power mechanisms are provided, respectively located at the four corners of the bridge deck.

[0013] In one embodiment of the utility model, the suspension rod is a precision-rolled threaded steel bar.

[0014] In one embodiment of the utility model, an I-beam is arranged above the Bailey beam, an outer formwork support is arranged between the I-beam and both sides below the bridge deck, a double-piece I-beam is arranged below the Bailey beam, a plurality of sand-filling barrels are arranged below the double-piece I-beam, and a steel pipe pier is arranged below each of the sand-filling barrels.

[0015] In one embodiment of the utility model, the double-piece I-beam is provided with a hole through which the suspension rod can pass.

[0016] The beneficial effects of the utility model are:

[0017] The hanger mechanism of the Bailey beam integral beam drop device provided by the utility model includes a fixed crossbeam and a movable crossbeam. The double distribution beam method is adopted to improve the force of each part of the hanger mechanism and increase the operation space, making the overall hanger mechanism safer and more reliable. The device introduces a control system, reduces the labor required for construction, avoids the overall overturning accident of the Bailey beam due to manual operation errors, solves the problem of high safety risks of traditional disassembly methods, has applicability and high efficiency, and helps to promote the automation and intelligentization process in the field of construction engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a Bailey beam integral beam dropping device provided in an embodiment of the utility model.

[0019] Figure 2 This is an elevation view of a Bailey beam integral beam dropping device provided in an embodiment of the utility model.

[0020] Figure 3 A three-dimensional diagram of a hanger system provided in an embodiment of the utility model.

[0021] Figure 4 A schematic diagram of a control system provided in an embodiment of the utility model.

[0022] In the figure: 1. Column; 2. Fixed beam; 3. Movable beam; 4. Hanger; 5. Lifting mechanism; 6. Nut; 7. Bridge deck; 8. Bailey beam; 9. Hanger mechanism; 10. Control system; 11. Power mechanism; 12. Hanger mechanism; 13. Outer mold support; 14. I-beam; 15. Connecting channel steel; 16. Double I-beam; 17. Sand filling tube; 18. Steel pipe pier. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] See also Figure 1-Figure 4As shown, a Bailey beam integral lowering device includes a hanger mechanism 12 and a power mechanism 11 installed on the bridge deck 7, wherein the hanger mechanism 12 includes a column 1, a fixed beam 2 connected between two of the columns 1, a hanger 4 passing through the fixed beam 2 and connected thereto, and a movable beam 3 located below the fixed beam 2 and connected to the hanger 4; the power mechanism 11 includes at least one jacking mechanism 5 installed on the bridge deck 7, and the output end of the jacking mechanism 5 is in contact with the movable beam 3; wherein the hanger 4 passes through the bridge deck 7 and is connected to the Bailey beam 8.

[0027] In some embodiments, it further includes a control system 10 connected to the lifting mechanism 5 of the power mechanism 11, and the control system 10 is used to control the lifting mechanism 5 to perform lifting.

[0028] Furthermore, the control system 10 includes a monitoring sensor, and the control system 10 can accurately monitor, adjust and control the process parameters such as pressure, flow and position of the jacking mechanism 5. By controlling the lifting and lowering of the output end of the jacking mechanism 5 and changing the connection state of the hanger mechanism 12, the Bailey beam 8 is lowered to the ground stably, safely and quickly as a whole. The Bailey beam overall beam dropping device can reduce safety risks, improve work efficiency, reduce the impact on the surrounding environment, make the construction more automated and intelligent, and has high applicability and promotion value.

[0029] In some embodiments, the lifting mechanism 5 includes a hydraulic jack or an electric pump, which can be raised and lowered repeatedly. The movable beam 3 is supported on the lifting mechanism 5 and can move up and down with the rise and fall of the output end of the lifting mechanism 5.

[0030] Optionally, when the lifting mechanism 5 adopts a hydraulic jack, the control system 10 adopts a PLC hydraulic control system.

[0031] In some embodiments, the suspension rod 4 is provided with a nut 6 for limiting the position of the fixed beam 2 and the movable beam 3 .

[0032] In some embodiments, four of the hanger mechanisms 12 and the power mechanisms 11 are provided, respectively located at the four corners of the bridge deck 7. Four hangers 4 pass through the bridge deck 7 and are respectively connected to the four corners of the Bailey beam 8, so that the Bailey beam 8 can be unloaded stably and safely as a whole.

[0033] Optionally, the suspension rod 4 is a precision-rolled threaded steel bar.

[0034] In some embodiments, an I-beam 14 is disposed above the Bailey beam 8, an outer mold support 13 is disposed between the I-beam 14 and both sides below the bridge deck 7, a double-jointed I-beam 16 is disposed below the Bailey beam 8, a plurality of sand-filling cylinders 17 are disposed below the double-jointed I-beam 16, a steel pipe support 8 is disposed below each of the sand-filling cylinders 17, and the double-jointed I-beam 16 is provided with a hole through which the suspension rod 4 can be passed. The lower end of the suspension rod 4 can be passed through the hole of the double-jointed I-beam 16 and connected to the double-jointed I-beam 16.

[0035] The use process of the Bailey beam integral beam dropping device provided by the utility model is as follows:

[0036] Step 1: Install the overall beam dropping device.

[0037] A total of 8 10cm reserved holes are reserved at 4 locations on the beam body. The reserved holes are reserved by Φ10cm PVC pipes or corrugated pipes. The positions are 3.4m on both sides of the center line of the beam (2.05m from the edge of the beam) and directly above the double I-beam.

[0038] The hanger is made of φ32 fine-rolled threaded steel, the fixed beam and movable beam are made of double-jointed 20a channel steel, and the column is made of square steel pipe B350x10.

[0039] Use a crane to install the jacking mechanism, fixed beams and columns, and use a manual hoist to install the suspender and mobile beam. The upper end of the suspender passes through the fixed beam and mobile beam, and the reserved hole is fixed on the fixed beam. The lower hanging point is fixed on the double-jointed I-beam. Adjust the position of the nut so that the Bailey beam falls within 20cm each time when it falls as a whole, and install four hanger mechanisms symmetrically at the four corners of the bridge in turn.

[0040] The lifting mechanism adopts hydraulic jack and the control system adopts PLC hydraulic control system.

[0041] Step 2: Remove the steel pipe pier.

[0042] Connect and fix the hanger to the fixed beam. At this time, the connection between the hanger and the movable beam is in a relaxed state. The lower end of the hanger is fixed to the beam connected to the Bailey beam. When dismantling, first open the sand cylinder mouth of the sand filling cylinder to release the sand, so that the Bailey beam is in a falling trend. The dead weight of the Bailey beam is borne entirely by the four hangers and the corresponding fixed beams.

[0043] The steel pipe piers on both sides are carried out simultaneously. From the middle steel pipe pier to both sides, the top supports are lifted up with jacks symmetrically in pairs to remove the steel pads. One piece is removed each time to ensure the overall uniform descent, lower the Bailey beam, and disconnect the outer formwork support from the bottom of the beam.

[0044] The beam-dropping system is raised, and the adjustable top support of the steel pipe pier is first removed by a winch to release the longitudinal and transverse connections of the steel pipe pier, and then the remaining steel pipe piers are removed by a crane.

[0045] Step 3: Lower the Bailey beam.

[0046] Since the bridge has transverse and longitudinal slopes, the Bailey beam has a certain slope. Before dropping the beam, the height difference is measured. First, two beam-dropping devices on one side are used to drop one end at the same time to make the Bailey beam horizontal. Then the beam-dropping devices on all sides work simultaneously to slowly drop the Bailey beam to the ground. For places with large ground slopes, when removing the columns, the height difference section is reserved, and the original steel pipe piers are used as temporary supports, and the Bailey beam is removed after the Bailey beam is removed.

[0047] The specific unloading operation process is as follows:

[0048] Step 1: Adjust the hydraulic jack to the maximum stroke, fix the connection between the boom and the moving beam, loosen the connection between the boom and the fixed beam, and make the deadweight of the Bailey beam borne by the moving beam and the hydraulic jack;

[0049] Step 2: Through the control system, the hydraulic jacks are evenly retracted at the same time to make the Bailey beam fall for a certain distance;

[0050] Step 3: Fix the connection between the boom and the fixed beam again, and loosen the connection between the boom and the movable beam;

[0051] Step 4: Repeat steps 1-3 until the Bailey beam falls to the ground.

[0052] The protection scope of the present invention is not limited to the above-mentioned embodiments. Any modifications, equivalent substitutions and improvements that can be made by professionals in the field within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A Bailey beam integral beam dropping device, characterized in that: It includes a hanger mechanism and a power mechanism installed on the bridge deck, wherein the hanger mechanism includes a column, a fixed beam connected between two of the columns, a hanger rod passing through the fixed beam and connected to the fixed beam, and a movable beam located below the fixed beam and connected to the hanger rod; the power mechanism includes at least one jacking mechanism installed on the bridge deck, and the output end of the jacking mechanism is in contact with the movable beam; wherein the hanger rod passes through the bridge deck and is connected to the Bailey beam.

2. The Bailey beam integral beam dropping device according to claim 1, characterized in that: It also includes a control system connected to the jacking mechanism of the power mechanism, and the control system is used to control the jacking mechanism to perform jacking.

3. The Bailey beam integral beam dropping device according to claim 2, characterized in that: The control system includes a monitoring sensor.

4. The Bailey beam integral beam dropping device according to claim 3, characterized in that: The lifting mechanism includes a hydraulic jack or an electric pump.

5. The Bailey beam integral drop device according to claim 4, characterized in that: When the lifting mechanism adopts a hydraulic jack, the control system adopts a PLC hydraulic control system.

6. The Bailey beam integral beam dropping device according to claim 1, characterized in that: The suspension rod is provided with a nut for limiting the position of the fixed crossbeam and the movable crossbeam.

7. The Bailey beam integral beam dropping device according to claim 1, characterized in that: The hanger mechanisms and power mechanisms are each provided with four, and are respectively located at the four corners of the bridge deck.

8. The Bailey beam integral beam dropping device according to claim 1, characterized in that: The suspension rod is made of precision-rolled threaded steel.

9. The Bailey beam integral beam dropping device according to claim 1, characterized in that: An I-beam is arranged above the Bailey beam, and outer formwork supports are arranged between the I-beam and both sides below the bridge deck. A double-piece I-beam is arranged below the Bailey beam, and a plurality of sand-filling barrels are arranged below the double-piece I-beam, and a steel pipe pier is arranged below each of the sand-filling barrels.

10. The Bailey beam integral drop device according to claim 9, characterized in that: The double-jointed I-beam is provided with a hole through which the suspension rod can pass.

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