Under-passing business line steel box girder sliding system

Abstract

The utility model discloses a kind of underpass operating line steel box girder sliding systems, comprising: two groups of sliding units and pole beam. Two groups of sliding units are installed on bearing structure with interval, and sliding unit includes slide, sliding trolley and cushion beam, slide is installed on bearing structure, sliding trolley is slidingly installed on slide, and cushion beam is installed on sliding trolley. The both ends of pole beam are connected with the cushion beam of two groups of sliding units respectively, and pole beam suspends steel box girder by connecting structure. Above-mentioned underpass operating line steel box girder sliding system, steel box girder is slid in the mode of suspension, and pole beam is the highest structure of entire system, can guarantee the normal sliding of steel box girder in place under the scene of limited space. While ensuring operating line construction safety, reduce the influence to surrounding structure, while strengthen the safety of each operation link, realize safe and efficient precision in place, can be applicable to underpass operating line or existing structure steel box girder efficient in place construction.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a sliding system for steel box girders passing under operational railway lines. Background Technology

[0002] Steel box girders are commonly used beam structures in important projects such as highways and urban rail transit. They have advantages such as light weight, high rigidity, short construction period, and strong adaptability, and are widely used in bridge engineering. Among them, the sliding construction technology is a commonly used method in the construction of steel box girders, which can greatly improve construction efficiency and quality, while reducing the impact of construction on traffic and the environment.

[0003] Steel box girders are typically moved using either jacking or dragging methods, both involving the application of sliding tracks, which are usually located beneath the steel box girder in relatively spacious environments. However, when moving steel box girders under operational railway lines, space constraints due to proximity to railway piers and superstructure beams often prevent the bottom-sliding method from being used, making it impossible to move the steel box girder. Utility Model Content

[0004] Therefore, it is necessary to provide a steel box girder sliding system that can pass under an operating railway line, addressing the problem that the existing bottom sliding method for steel box girders cannot be used in space-constrained scenarios.

[0005] A sliding system for a steel box girder passing under an operational railway line includes: two sets of sliding units and a spreader beam; Two sets of the aforementioned sliding units are installed at intervals on the load-bearing structure. Each sliding unit includes a slide rail, a sliding trolley, and a pad beam. The slide rail is installed on the load-bearing structure, the sliding trolley is slidably installed on the slide rail, and the pad beam is installed on the sliding trolley. The two ends of the spreader beam are respectively connected to the pad beams of the two sets of sliding units, and the spreader beam suspends the steel box girder through the connecting structure.

[0006] In one embodiment, each group of sliding units is provided with two sliding trolleys and two pad beams. The two sliding trolleys are spaced apart on the slide rail, and the two pad beams are respectively installed on the two sliding trolleys. The two spreader beams are respectively installed on the two pad beams of the same group of sliding units.

[0007] In one embodiment, the two pad beams of the sliding unit in the same group are connected by a connecting rod.

[0008] In one embodiment, the sliding unit further includes a wedge-shaped steel plate installed between the sliding trolley and the pad beam, and the two wedge-shaped steel plates slide against each other to adjust the height of the pad beam.

[0009] In one embodiment, the pad beam is detachably connected to the sliding trolley by bolts.

[0010] In one embodiment, the wedge-shaped steel plate is provided with a handle for pushing and pulling the wedge-shaped steel plate to slide.

[0011] In one embodiment, the connection structure includes a first lifting lug, a second lifting lug, and a sling. The first lifting lug is installed on the spreader beam, the second lifting lug is installed on the steel box girder, and the sling connects the first lifting lug and the second lifting lug.

[0012] In one embodiment, a lateral attitude adjustment device is also included, which is mounted on the pad beam and is used to drive the spreader beam to slide relative to the pad beam.

[0013] In one embodiment, the lateral attitude adjustment device includes a fixed beam, a reaction seat, a top support seat, and a jack. The fixed beam is installed on the pad beam, the reaction seat is installed on the fixed beam, the top support seat is installed on the spreader beam, and the jack is disposed between the top support seat and the reaction seat.

[0014] In one embodiment, a PTFE sliding plate is provided between the spreader beam and the pad beam.

[0015] The aforementioned sliding system for steel box girders passing under operational railway lines has at least the following advantages: A steel box girder is suspended using a spreader beam. After suspension, the girder is slid into place via a sliding trolley moving along a track. This sliding system avoids the traditional bottom-sliding method, using a suspended approach for the girder's movement. The spreader beam, being the highest structure in the system, ensures the girder's proper placement even in space-constrained environments. This system ensures construction safety on operational railway lines while minimizing impact on surrounding structures. It also enhances the safety of each operational stage, achieving safe, efficient, and precise placement. It is suitable for the efficient placement of steel box girders under operational railway lines or existing structures. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the structure of a steel box girder sliding system that passes under an operational railway line in one embodiment; Figure 2 for Figure 1 The side view of the sliding system for the steel box girder passing under the operating railway line is shown. Figure 3 for Figure 2 Structural diagram of the sliding trolley and the support beam; Figure 4 for Figure 3 Schematic diagram of the structure of the wedge-shaped steel plate; Figure 5 This is a schematic diagram showing the steel box girder suspended by the spreader beam and connecting structure. Figure 6 This is a schematic diagram of the lateral attitude adjustment device.

[0018] Figure label: 1-Bearing structure, 2-Steel box girder, 3-Beam body, 10-Sliding unit, 11-Slide track, 12-Sliding trolley, 13-Padded beam, 14-Connecting rod, 15-Wedge steel plate, 152-Handle, 20-Spreader beam, 30-Connecting structure, 31-First lifting lug, 32-Second lifting lug, 33-Lifting strap, 40-Horizontal attitude adjustment device, 41-Fixed beam, 42-Reaction seat, 43-Top support seat, 44-Jack, 45-PTFE sliding plate. Detailed Implementation

[0019] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0022] Please see Figure 1 and Figure 2One embodiment of the steel box girder sliding system under the operating line includes two sets of sliding units 10 and a spreader beam 20. The two sets of sliding units 10 are installed at intervals on the load-bearing structure 1, and the two ends of the spreader beam 20 are respectively installed on the two sets of sliding units 10. The spreader beam 20 is used to suspend the steel box girder 2, and then the sliding units 10 are used to achieve sliding into position.

[0023] In one embodiment, the load-bearing structure 1 can be an existing structure, such as a newly constructed bridge pier. The load-bearing structure 1 can also be an erected construction scaffold.

[0024] In one embodiment, the sliding unit 10 includes a slide rail 11, a sliding trolley 12, and a support beam 13. The slide rail 11 is installed on the load-bearing structure 1, the sliding trolley 12 is installed on the slide rail 11, and the support beam 13 is installed on the sliding trolley 12. The two ends of the spreader beam 20 are respectively connected to the support beams 13 of the two sets of sliding units 10.

[0025] To ensure the smooth sliding of the steel box girder 2, the height of the spreader beam 20 should not exceed the bottom elevation of the upper beam 3, and a certain gap should be left. By sliding the sliding trolley 12 on the slide rail 11, the pad beam 13 is driven to move, the movement of the pad beam 13 drives the spreader beam 20 to move, and finally the spreader beam 20 drives the suspended steel box girder 2 to slide horizontally.

[0026] In one embodiment, to ensure the stability of the steel box girder 2 during the sliding process, each sliding unit 10 is equipped with two sliding trolleys 12 and two pad beams 13. The two sliding trolleys 12 are spaced apart on the same slide rail 11, and the spacing between the two sliding trolleys 12 matches the size of the steel box girder 2. The two pad beams 13 are respectively installed on the two sliding trolleys 12, and the two spreader beams 20 are installed on the two pad beams 13 of the same sliding unit 10, that is, the four ends of the two spreader beams 20 are respectively installed on the four pad beams 13. In this embodiment, the steel box girder 2 is suspended by the two spreader beams 20, which can ensure the stability of the steel box girder 2 during the translation and sliding process.

[0027] In one embodiment, two pad beams 13 of the same sliding unit 10 are connected by a connecting rod 14. Connecting two pad beams 13 on the same side as a whole via the connecting rod 14 enhances the overall rigidity of the sliding system and ensures that the trajectories of the front and rear sliding carriages 12 of the same sliding unit 10 are basically consistent during the sliding process. To further enhance the overall rigidity of the sliding system, the two sliding carriages 12 of the same sliding unit 10 can be connected and fixed using the connecting rod 14.

[0028] Please refer to the following: Figure 3In one embodiment, the sliding unit 10 further includes wedge-shaped steel plates 15, which are installed between the sliding trolley 12 and the pad beam 13. The wedge-shaped steel plates 15 are arranged in pairs, and the two pairs slide relative to each other to adjust the height of the pad beam 13, thereby adjusting the height of the spreader beam 20 and ultimately adjusting the elevation of the steel box girder 2. Simultaneously, the pair of wedge-shaped steel plates 15 work together to ensure the level of the pad beam 13, preventing the upper pad beam 13 from tilting.

[0029] In one embodiment, the pad beam 13 and the sliding trolley 12 are detachably connected by bolts. The height of the pad beam 13 can be adjusted using a wedge-shaped steel plate 15. After the height of the pad beam 13 is adjusted, it is fixed to the sliding trolley 12 with bolts to maintain its height.

[0030] Please refer to the following: Figure 4 In one embodiment, the wedge-shaped steel plate 15 is provided with a handle 152, which can be pushed and pulled to slide the wedge-shaped steel plate 15, thereby realizing the mutual sliding track 11 of the two wedge-shaped steel plates 15 to adjust the height of the pad beam 13.

[0031] Please refer to the following: Figure 5 In one embodiment, the spreader beam 20 suspends the steel box beam 2 via the connecting structure 30.

[0032] Specifically, the connecting structure 30 includes a first lifting lug 31, a second lifting lug 32, and a lifting strap 33. The first lifting lug 31 is installed on the spreader beam 20, and the second lifting lug 32 is installed on the steel box girder 2. The second lifting lug 32 is preferably located at the node of the steel box girder 2 plate unit; alternatively, a stiffening plate can be added inside the steel box girder 2 corresponding to the lifting lug to prevent excessive local stress and deformation of the steel box girder 2 plate unit. The lifting strap 33 connects the first lifting lug 31 and the second lifting lug 32, enabling the spreader beam 20 to suspend the steel box girder 2. Specifically, the lifting lugs and the lifting strap 33 are connected by pins, allowing for rapid suspension and disassembly of the steel box girder 2.

[0033] It is understood that in other embodiments, the spreader beam 20 may also use other connection structures 30 to suspend the steel box girder 2, such as using a hanger rod for suspension.

[0034] Please refer to the following: Figure 6 In one embodiment, the sliding system for the steel box girder passing under the operating line further includes a lateral attitude adjustment device 40. The lateral attitude adjustment device 40 is mounted on the pad beam 13, and the end of the spreader beam 20 overlaps the pad beam 13. The connection between the pad beam 13 and the spreader beam 20 is not fixed. The lateral attitude adjustment device 40 is used to drive the spreader beam 20 to slide relative to the pad beam 13 to adjust the lateral position of the steel box girder 2.

[0035] In one embodiment, four lateral attitude adjustment devices 40 are provided, and the four lateral attitude adjustment devices 40 are respectively set on four pad beams 13 to ensure the stability of the lateral adjustment of the steel box girder 2.

[0036] In one embodiment, the lateral attitude adjustment device 40 includes a fixed beam 41, a reaction seat 42, a top support seat 43, and a jack 44. The fixed beam 41 is mounted on the pad beam 13, the reaction seat 42 is mounted on the fixed beam 41, the top support seat 43 is mounted on the spreader beam 20, and the jack 44 is positioned between the top support seat 43 and the reaction seat 42. By lifting the jack 44, the top support seat 43 and the reaction seat 42 can be pushed relatively away, increasing the distance between the fixed beam 41 and the spreader beam 20, thereby adjusting the lateral offset of the steel box girder 2. The jack 44 can be a hand-cranked jack or a hydraulic jack, but attention must be paid to the size requirements.

[0037] In one embodiment, a PTFE sliding plate 45 is provided between the spreader beam 20 and the pad beam 13. The PTFE sliding plate 45 has vertical stiffness, compressive deformation capacity and the ability to bear vertical loads. At the same time, the PTFE sliding plate 45 has low friction characteristics, which can reduce the frictional resistance during the sliding process of the spreader beam 20.

[0038] The aforementioned steel box girder sliding system for underpasses under operational railway lines avoids the traditional bottom sliding method. Instead, it uses a suspended sliding mechanism for the steel box girder 2, with the spreader beam 20 serving as the highest structure in the entire system. This ensures the normal sliding and positioning of the steel box girder 2 even in space-constrained environments. While ensuring construction safety under operational railway lines, it minimizes the impact on surrounding structures and enhances the safety of each operational stage, achieving safe, efficient, and precise positioning. It is applicable to the efficient positioning of steel box girders 2 under operational railway lines or existing structures, and the process is simple to operate, clear, safe, and stable.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A sliding system for steel box girders passing under an operational railway line, characterized in that, include: Two sets of sliding elements and a spreader beam; Two sets of the aforementioned sliding units are installed at intervals on the load-bearing structure. Each sliding unit includes a slide rail, a sliding trolley, and a pad beam. The slide rail is installed on the load-bearing structure, the sliding trolley is slidably installed on the slide rail, and the pad beam is installed on the sliding trolley. The two ends of the spreader beam are respectively connected to the pad beams of the two sets of sliding units, and the spreader beam suspends the steel box girder through the connecting structure.

2. The sliding system for steel box girders passing under an operational railway line according to claim 1, characterized in that, Each group of sliding units is provided with two sliding trolleys and two pad beams. The two sliding trolleys are spaced apart on the slide rail, and the two pad beams are respectively installed on the two sliding trolleys. The two spreader beams are respectively installed on the two pad beams of the same group of sliding units.

3. The sliding system for steel box girders passing under an operational railway line according to claim 2, characterized in that, The two pad beams of the sliding unit in the same group are connected by a connecting rod.

4. The sliding system for steel box girders passing under an operational railway line according to claim 1, characterized in that, The sliding unit also includes a wedge-shaped steel plate, which is installed between the sliding trolley and the pad beam. The two wedge-shaped steel plates slide against each other to adjust the height of the pad beam.

5. The sliding system for steel box girders passing under an operational railway line according to claim 4, characterized in that, The pad beam is detachably connected to the sliding trolley by bolts.

6. The sliding system for steel box girders passing under an operational railway line according to claim 4 or 5, characterized in that, The wedge-shaped steel plate is provided with a handle for pushing and pulling the wedge-shaped steel plate to slide.

7. The sliding system for steel box girders passing under an operational railway line according to claim 1, characterized in that, The connection structure includes a first lifting lug, a second lifting lug, and a lifting strap. The first lifting lug is installed on the spreader beam, the second lifting lug is installed on the steel box girder, and the lifting strap connects the first lifting lug and the second lifting lug.

8. The sliding system for steel box girders passing under an operational railway line according to claim 1, characterized in that, It also includes a lateral attitude adjustment device, which is installed on the pad beam and is used to drive the spreader beam to slide relative to the pad beam.

9. The sliding system for steel box girder passing under an operational railway line according to claim 8, characterized in that, The lateral attitude adjustment device includes a fixed beam, a reaction seat, a top support seat, and a jack. The fixed beam is installed on the pad beam, the reaction seat is installed on the fixed beam, the top support seat is installed on the spreader beam, and the jack is positioned between the top support seat and the reaction seat.

10. The sliding system for steel box girders passing under an operational railway line according to claim 8 or 9, characterized in that, A PTFE sliding plate is provided between the spreader beam and the pad beam.

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