A suspended platform for welding the guide beam of a steel box girder

Abstract

This utility model relates to the field of bridge construction technology, specifically to a suspended platform for the installation and welding of the guide beam of a steel box girder. It includes a hanging frame and an operating platform. The hanging frame comprises a hanging rod, a hanging rod baffle, and a pad. The hanging rod baffle is vertically disposed at one end of the hanging rod, and the operating platform is welded to the other end of the hanging rod. The pad is welded to the hanging rod baffle, and bolt holes are provided on the pad for fixing the hanging frame to the main beam of the guide beam using bolts. The operating platform comprises vertical rods, horizontal rods, and a steel plate. The vertical rods and horizontal rods are perpendicularly connected to form a frame. The steel plate is welded to the bottom of the vertical rods. This design solves the problem of limited space for high-altitude operations and the limitation of the lifting height of aerial work platforms on high-pier bridges.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a suspended platform for the installation and welding of the front guide beam of a steel box girder. Background Technology

[0002] In the jacking construction of bridge steel box girders, high-altitude operations are a common and critical part of the construction process. Taking the installation and welding of the leading beam of the steel box girder as an example, since the leading beam is located above the bridge's free-face, its installation and welding work inevitably involves high-altitude operations. Currently, the industry mainly uses aerial work platforms as temporary work platforms for such high-altitude operations. These platforms transport construction personnel and equipment to the designated height to complete the installation and welding of the leading beam.

[0003] However, existing construction technologies have certain limitations in practical applications. Taking the steel box girder jacking construction project of the Hezhou Viaduct on the Yanjiang Expressway as an example, when installing the west side of the sixteenth span on the right side of the bridge, a highway protective shed was set up below the guide beam diaphragm. This special construction site condition limited the use of aerial work platforms, making it impossible to install the guide beam diaphragm using traditional aerial work platforms, which greatly affected the construction progress and efficiency. In addition, for high-pier bridges, due to the inherent lifting height of aerial work platforms, when the bridge piers are high, the aerial work platforms cannot reach the corresponding working height, failing to meet the construction requirements. This makes it impossible for construction personnel to carry out high-altitude operations smoothly, thus restricting the promotion and application of bridge steel box girder jacking construction technology under complex working conditions. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this application provides a suspended platform for the installation and welding of the front guide beam of a steel box girder, which aims to improve construction efficiency and reduce construction costs.

[0005] The technical means adopted by this utility model to solve its technical problem is: a suspended platform for the installation and welding of the front guide beam of a steel box girder, the improvement of which is that it includes: a hanging frame and an operating platform, wherein,

[0006] The hanger includes a hanging rod, a hanging rod baffle, and a pad. The hanging rod baffle is vertically disposed at one end of the hanging rod, and the operating platform is welded to the other end of the hanging rod. The pad is welded to the hanging rod baffle, and bolt holes are provided on the pad. The hanger is fixed to the main beam of the guide beam by bolts.

[0007] The operating platform includes vertical rods, horizontal rods, and steel plates. The vertical rods and horizontal rods are connected perpendicularly to each other to form a frame, and the steel plates are welded to the bottom of the vertical rods.

[0008] The hanging rod and hanging rod baffle mentioned in the above technical solution are both made of L63X6 angle steel.

[0009] The above-mentioned technical solution also includes a lifting lug above the hanging rod.

[0010] In the above technical solution, triangular reinforcing ribs are provided at the connection between the vertical rod and the steel plate, and at the connection between the vertical rod and the hanging rod, and the thickness of the reinforcing ribs is not less than 3mm.

[0011] The suspended platform described in the above technical solution is surrounded by a protective net.

[0012] The steel plate surface described in the above technical solution is provided with anti-slip patterns. The anti-slip patterns are made by embossing process, with a pattern depth of not less than 0.5 mm and a pattern spacing of not more than 20 mm.

[0013] The lifting lugs described in the above technical solution are double-ear plate structures, including: two parallel ear plates, which are vertically welded to the top of the hanging rod; the ear plates have coaxial pin holes, and copper bushings are embedded in the inner walls of the pin holes, with the inner diameter of the bushings matching the diameter of the lifting hook of the lifting equipment.

[0014] The protective netting described in the above technical solution includes: a flexible net woven from steel wire ropes, the diameter of which is not less than 4mm, the mesh being rectangular in shape, and the diagonal length not greater than 80mm.

[0015] The beneficial effects of this utility model are:

[0016] A detachable suspended platform device is assembled by welding angle steel, steel plates, and other materials. This device is bolted to the main beam of the guide beam, avoiding the need for welding and thus simplifying construction operations. Simultaneously, this device solves the problem of limited height for aerial work platforms during the construction of high-pier bridges, as well as the inability to use aerial work platforms due to site constraints. The device uses conventional materials, is easy to assemble, and facilitates convenient operation, thereby increasing construction efficiency. Attached Figure Description

[0017] Figure 1 This is a front view of a suspended platform for installing and welding the front guide beam of a steel box girder, as shown in an embodiment of the present invention.

[0018] Figure 2 This is a side view of a suspended platform for installing and welding the front guide beam of a steel box girder, as shown in an embodiment of the present invention.

[0019] Figure 3 This is a top view of a suspended platform for installing and welding the front guide beam of a steel box girder, as shown in an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram illustrating the installation of a suspended platform for welding the front guide beam of a steel box girder, as shown in an embodiment of this utility model. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0023] like Figure 1-4 As shown, this application provides a suspended platform for the installation and welding of the front guide beam of a steel box girder, comprising: a hanging frame 1 and an operating platform 2, wherein,

[0024] The hanger 1 includes a hanging rod 11, a hanging rod baffle 12, and a pad 13. The hanging rod baffle 12 is vertically disposed at one end of the hanging rod 11, and the operating platform 2 is welded to the other end of the hanging rod 11. The pad 13 is welded to the hanging rod baffle 12, and the pad 13 is provided with bolt holes 14. The hanger 1 is fixed to the guide beam main beam A by bolts.

[0025] The operating platform 2 includes a vertical rod 21, a horizontal rod 22, and a steel plate 23. The vertical rod 21 and the horizontal rod 22 are connected perpendicularly to each other to form a frame, and the steel plate 23 is welded to the bottom of the vertical rod 21.

[0026] Specifically, during the installation and welding of the steel box girder guide beam, the suspended platform hanging rod 11 is fixed to the main beam A of the guide beam using 1cm thick steel pressure plates and M22*60 bolts. During construction, workers move up and down using the horizontal bar 22 of the operating platform. After construction is completed, the suspended platform can be moved to the next welding work point by removing the bolts. To ensure construction safety, operators on the temporary suspended platform must wear safety ropes, and no more than two people are allowed. The safety ropes are positioned for convenient construction and are attached to sturdy partitions and guide beam stiffeners.

[0027] In one possible implementation, both the hanging rod 11 and the hanging rod baffle 12 are made of L63X6 angle steel.

[0028] The L63X6 indicates that the angle steel has a side length of 63mm and a thickness of 6mm; angle steel of this size can provide high resistance to bending, torsion and compression, while also being able to withstand large loads, thus preventing the hanging rod from deforming or breaking.

[0029] In one possible implementation, a lifting lug is also provided above the hanging rod 11.

[0030] In one exemplary embodiment, the lifting lug is a double-ear plate structure, comprising:

[0031] Two parallel ear plates 15 are vertically welded to the top of the hanging rod 11. The ear plates 15 have coaxial pin holes 151, and a copper bushing is embedded in the inner wall of the pin hole 151. The inner diameter of the bushing matches the diameter of the hook of the lifting equipment.

[0032] The parallel design of the double lugs forms a double-support structure, which can significantly distribute the load and reduce the risk of local stress concentration compared to a single lug. At the same time, the vertical welding method ensures a rigid connection between the lugs and the hanging rod, avoiding structural instability caused by welding angle deviation, improving the overall resistance to deformation, and extending the service life of the equipment while improving the safety and efficiency of hoisting operations and reducing the total life cycle cost.

[0033] In one possible implementation, triangular reinforcing ribs 24 are provided at the connection between the vertical rod 21 and the steel plate 23, and at the connection between the vertical rod 21 and the hanging rod 11, and the thickness of the reinforcing ribs is not less than 3mm.

[0034] By adding reinforcing ribs at the connection nodes between the vertical rod and the steel plate / hanging rod, a rigid triangular support system can be formed, which can effectively improve the bending and shear resistance at the nodes and prevent the connection parts from deforming or loosening during long-term use or under load. The design with a thickness of not less than 3mm increases the moment of inertia of the cross section, giving the ribs higher bending stiffness, which can effectively cope with dynamic loads or impact loads.

[0035] In one possible implementation, the suspended basket is surrounded by a protective net cover 25.

[0036] In an exemplary embodiment, the protective net cover 25 includes: a flexible net body woven from steel wire ropes, the diameter of the steel wire ropes being not less than 4 mm, the mesh having a rectangular structure, and the diagonal length not greater than 80 mm.

[0037] The flexible steel wire rope mesh can absorb 30-50% of the impact energy through deformation when it is hit, significantly reducing the secondary impact on the main body of the suspended platform. At the same time, the rectangular mesh structure maintains a ventilation rate of more than 85%, reduces the wind resistance coefficient, and maintains a light transmittance of ≥70%, improving the working environment and further ensuring the safety of construction personnel.

[0038] In one possible implementation, the surface of the steel plate 23 is provided with an anti-slip pattern, which is made by an embossing process, with a pattern depth of not less than 0.5 mm and a pattern spacing of not more than 20 mm.

[0039] By reconstructing the micro-geometry, a pattern depth of 0.5 mm can increase the surface static friction coefficient by 40-60%. Even in oily or humid environments, it can still maintain an effective friction coefficient of ≥0.5, significantly reducing the risk of people slipping.

[0040] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A basket for steel box girder nose girder installation welding, characterized in that, include: The mounting bracket and operating platform, among which, The hanger includes a hanging rod, a hanging rod baffle, and a pad. The hanging rod baffle is vertically disposed at one end of the hanging rod, and the operating platform is welded to the other end of the hanging rod. The pad is welded to the hanging rod baffle, and bolt holes are provided on the pad. The hanger is fixed to the main beam of the guide beam by bolts. The operating platform includes vertical rods, horizontal rods, and steel plates. The vertical rods and horizontal rods are connected perpendicularly to each other to form a frame, and the steel plates are welded to the bottom of the vertical rods.

2. The suspended platform for installing and welding the front guide beam of a steel box girder according to claim 1, characterized in that, Both the hanging rod and the hanging rod baffle are made of L63X6 angle steel.

3. The suspended platform for installing and welding the front guide beam of a steel box girder according to claim 1, characterized in that, The hanging rod is also equipped with a lifting lug.

4. The suspended platform for installing and welding the front guide beam of a steel box girder according to claim 1, characterized in that, Triangular reinforcing ribs are provided at the connection between the vertical rod and the steel plate, and at the connection between the vertical rod and the hanging rod, and the thickness of the reinforcing ribs is not less than 3mm.

5. A suspended platform for installing and welding the front guide beam of a steel box girder according to claim 1, characterized in that, The suspended basket is surrounded by a protective net.

6. A suspended platform for installing and welding the front guide beam of a steel box girder according to claim 1, characterized in that, The steel plate surface is provided with anti-slip patterns, which are made by embossing process, with a pattern depth of not less than 0.5mm and a pattern spacing of not more than 20mm.

7. A suspended platform for installing and welding the front guide beam of a steel box girder according to claim 3, characterized in that, The lifting lugs are a double-ear plate structure, including: Two parallel ear plates are vertically welded to the top of the hanging rod; each ear plate has a coaxial pin hole, and a copper bushing is embedded in the inner wall of the pin hole, with the inner diameter of the bushing matching the diameter of the lifting equipment hook.

8. A suspended platform for installing and welding the front guide beam of a steel box girder according to claim 5, characterized in that, The protective mesh cover includes: A flexible net woven from steel wire ropes, with a wire rope diameter of not less than 4mm, and a rectangular mesh structure with a diagonal length of not more than 80mm.

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