Steel bridge plate supporting structure

Abstract

The utility model relates to the technical field of steel structure accessories, in particular to a steel bridge plate supporting structure which comprises a truss supporting column unit, the top of the truss supporting column unit is fixedly supported at the bottom of a corresponding steel bridge plate, and a vertical center unit is installed in the inner space of the truss supporting column unit. The vertical center unit and the truss strut unit are coaxially arranged, the top of the vertical center unit is fixed to the bottom of the steel bridge plate, side supporting pieces are installed on the left side and the right side of the truss strut unit respectively, and a lower protection piece is fixedly installed on the periphery of the lower portion of the truss strut unit. According to the utility model, through a dual supporting structure consisting of the truss strut units and the vertical central unit, the end part and the middle part of the bridge plate of the steel bridge are effectively supported, the stability and the reliability of supporting the bridge plate of the steel bridge are obviously improved, and the safety of supporting the end part of the steel bridge is ensured.

Description

Technical Field

[0001] This utility model relates to the field of steel structure accessories technology, and in particular to a steel bridge deck support structure. Background Technology

[0002] Steel bridges are bridges constructed primarily of steel. They are characterized by high strength, good toughness, and fast construction speed. They play an important role in transportation infrastructure, serving as key nodes in transportation networks such as highways, railways, and urban roads. They are used to cross obstacles such as rivers, canyons, and roads, enabling vehicles and pedestrians to pass safely and conveniently.

[0003] In steel bridge structures, bottom supports are generally required to ensure stable load-bearing. There are some technical documents related to steel bridge deck supports in the existing technology.

[0004] For example, prior art patent application CN202020121768.5 discloses a reinforced steel bridge, which supports the main body of the steel bridge through end columns and steel pipe columns, and uses crossbeams to lay the steel bridge deck. However, in practical applications, the above structure still has obvious shortcomings, as follows:

[0005] First, the lack of a structure for supporting the first and second side beams at the ends means that when the bridge is subjected to forces from different directions, such as wind or lateral forces generated by vehicles, the existing support structure cannot effectively resist them, leading to the risk of swaying and lifting at the ends of the bridge.

[0006] Secondly, the structure that relies solely on vertical columns to support the bridge deck lacks effective lateral restraint and reinforcement measures, making the bridge prone to swaying, displacement, or even tilting under horizontal forces, resulting in poor safety against multi-directional loads.

[0007] Based on this, it can be seen that designing a support structure that can provide stable support at the ends of the steel bridge deck and cope with complex loads is necessary for the stability of the entire steel bridge deck. Utility Model Content

[0008] To solve one of the aforementioned technical problems, the present invention provides the following technical solution: a steel bridge deck support structure, comprising a truss support unit, the top of which is fixedly supported on the bottom of the corresponding steel bridge deck, the bottom of which is pre-embedded, cast, and fixed below the ground, a vertical center unit installed within the internal space of the truss support unit, the vertical center unit being coaxially arranged with the truss support unit, the bottom of which is pre-embedded and fixed below the ground, the top of which is fixed to the bottom of the steel bridge deck, side supports installed on the left and right sides of the truss support unit, and a lower protective component fixedly installed on the lower periphery of the truss support unit, the bottom of which is fixed to the ground.

[0009] The steel bridge deck support structure of this utility model relies on truss column units to support the ends of the steel bridge deck, effectively ensuring the stability of the support. At the same time, it relies on vertical center units to achieve central reinforcement support. In addition, the bottom positioning strength is achieved by pre-embedding and fixing the bottom of both the truss column units and the vertical center units below the ground.

[0010] In any of the above embodiments, it is preferred that the truss support unit includes a vertically arranged vertical steel structure truss, the bottom of which is pre-embedded, cast, and fixed below the ground, the top of which is fixed to the bottom of the steel bridge deck, and a support connecting plate seat is horizontally fixedly welded to the upper outer wall of the vertical steel structure truss. Both ends of the support connecting plate seat are bolted and fixed to the steel bridge deck by a number of bolts.

[0011] In any of the above embodiments, it is preferred that the vertical central unit includes a central steel tube column that is vertically and coaxially arranged in the inner cavity of the vertical steel structure truss. The bottom of the central steel tube column is pre-embedded and fixed below the ground. The top of the central steel tube column is fixed to the bottom of the steel bridge plate. An upper seat and a lower seat are respectively installed on the top and bottom of the steel bridge plate above the casting cavity of the central steel tube column. A casting anti-detachment connection component is provided inside the casting cavity. The top of the casting anti-detachment connection component passes through the through hole on the lower seat, the steel bridge plate, and is fixedly connected to the bottom of the upper seat.

[0012] In any of the above embodiments, it is preferred that the casting anti-detachment connection component includes an anti-detachment column vertically and coaxially arranged inside the casting cavity of the central steel pipe. The top of the anti-detachment column movably passes through the lower seat and the steel bridge plate and is fixedly connected to the top of the upper seat. Several wedge-shaped anti-detachment teeth are integrally formed and fixed from top to bottom on the lower outer wall of the anti-detachment column. A concrete reinforcement column formed by casting concrete is poured inside the casting cavity. The bottom of the concrete reinforcement column is flush with the bottom of the central steel pipe.

[0013] In any of the above embodiments, it is preferred that an integral spiral tube for horizontal reinforcement members to pass through is integrally formed in the middle of the anti-detachment column, and an internal thread is provided inside the central cavity of the integral spiral tube.

[0014] In any of the above embodiments, it is preferred that the horizontal reinforcement component includes a horizontally arranged double-headed reinforcing stud, which is screwed into the central cavity of the integral spiral tube and both ends of which movably pass through the grouting holes on the outer side walls of the central steel tube and extend to the outside of the vertical steel truss. End anti-loosening nuts are screwed onto the outer side walls of both ends of the double-headed reinforcing stud.

[0015] In any of the above embodiments, it is preferred that the side brace includes a diagonal bracing plate disposed on one side of the vertical steel truss, the upper part of the diagonal bracing plate being bolted to the bottom of the support connecting plate seat, and the lower part of the diagonal bracing plate being bolted to the corresponding side wall of the vertical steel truss.

[0016] In any of the above embodiments, it is preferred that the bottom of the central steel column is located below the bottom of the vertical steel truss.

[0017] In any of the above embodiments, it is preferred that both of the grouting holes are used to allow concrete grout pushed in by external high pressure to enter the pouring cavity.

[0018] In any of the above embodiments, it is preferred that the lower protective component includes a lower restraining steel sleeve fixedly fitted onto the lower outer wall of the vertical steel structure truss, and the bottom of the lower restraining steel sleeve is pre-embedded and fixed below the ground.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model achieves effective support for the ends and middle of the steel bridge deck through a dual support structure composed of truss support units and vertical center units, significantly improving the stability and reliability of the steel bridge deck support and ensuring the safety of the steel bridge end support.

[0021] 2. This utility model adopts a bottom pre-embedded fixing design, so that the bottom of the truss support unit and the vertical center unit are pre-embedded, cast and fixed below the ground, which enhances the positioning strength and bottom pull-out resistance of the structure and effectively resists the upward pull and horizontal displacement of the structure.

[0022] 3. The side bracing and lower protective components of this utility model are provided, wherein the side bracing offsets the horizontal load by diagonal tension, thereby reducing the lateral displacement of the structure; the lower protective components constrain the lower displacement of the truss support unit, increase the bottom support area, improve the overturning resistance, and further optimize the wind resistance and lateral displacement resistance of the structure.

[0023] 4. In the design of the central steel pipe column and the anti-detachment column, the present invention forms an integral whole by pouring concrete, and the anti-detachment column is equipped with wedge-shaped anti-detachment teeth to effectively prevent concrete from falling off. At the same time, the concrete reinforces the column to transfer the load under pressure and improve its durability, forming a reliable central support. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is a partial three-dimensional structural schematic diagram of the truss support unit and the vertical center unit of this utility model.

[0027] Figure 3 for Figure 2 A schematic diagram of the internal cross-sectional structure.

[0028] Figure 4 for Figure 1 A schematic diagram of the partial internal cross-sectional structure.

[0029] In the diagram: 1. Steel bridge deck; 2. Vertical steel truss; 3. Support connecting plate seat; 4. Bolts; 5. Central steel pipe column; 6. Upper seat; 7. Lower seat; 8. Anti-detachment column; 9. Wedge-shaped anti-detachment tooth; 10. Concrete reinforced column; 11. Integrated spiral tube; 12. Diagonal bracing plate; 13. Double-headed reinforcing stud; 14. End anti-detachment nut; 15. Grouting hole; 16. Lower restraint steel sleeve; 17. Ground. Detailed Implementation

[0030] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-4 As shown in the image.

[0031] Example 1: A steel bridge deck support structure includes a truss support unit. The top of the truss support unit is fixedly supported on the bottom of the corresponding steel bridge deck 1. The bottom of the truss support unit is pre-embedded, cast, and fixed below the ground 17. A vertical center unit is installed in the internal space of the truss support unit. The vertical center unit is coaxially arranged with the truss support unit. The bottom of the vertical center unit is pre-embedded and fixed below the ground. The top of the vertical center unit is fixed to the bottom of the steel bridge deck 1. Side bracing members are installed on the left and right sides of the truss support unit. A lower protective member is fixedly installed on the lower periphery of the truss support unit. The bottom of the lower protective member is fixed to the ground.

[0032] In this utility model, the truss support unit provides end support, the vertical central unit strengthens the middle support, and the double support structure improves the overall stability; the pre-embedded fixing enhances the bottom pull-out resistance and positioning strength; the side bracing members offset horizontal loads (such as wind force and vehicle braking load) through diagonal tension, reducing structural lateral displacement; the lower protective members constrain the lower displacement of the truss support unit, increase the bottom support area, improve the overturning resistance, and protect the bottom of the support from external impact, thereby achieving vertical support, horizontal wind-resistant support and bottom protection for the steel bridge deck.

[0033] The steel bridge deck support structure of this utility model relies on truss support units to support the ends of the steel bridge deck 1, effectively ensuring the stability of the support. At the same time, it relies on vertical center units to achieve central reinforcement support. In addition, the bottom positioning strength is achieved by pre-embedding and fixing the bottom of both the truss support units and the vertical center units below the ground.

[0034] Specifically, the truss support unit, as the main load-bearing component at the ends, bears the load at the ends of the bridge deck and transfers it to the foundation; the vertical center unit, as the auxiliary load-bearing component in the middle, shares the load in the middle. Both are rigidly connected to the foundation through pre-embedded concrete at the bottom, resisting structural uplift and horizontal displacement. The zoned design of the end and middle supports makes the load distribution more even and avoids the concentration of force on a single component; the pre-embedded "concrete-steel structure" composite foundation utilizes the compressive strength of concrete and the tensile strength of steel to improve the overall stiffness and uplift resistance at the bottom.

[0035] The steel bridge deck support structure provided by this utility model, through a double support structure composed of truss support units and vertical center units, significantly improves the stability and reliability of the steel bridge deck support. The pre-embedded fixing design at the bottom enhances the positioning strength of the structure, while the side supports and lower protective components further optimize the structure's wind resistance and lateral displacement resistance. Overall, it achieves multi-point support and reinforcement of the steel bridge deck 1, meeting the requirements for high strength and high stability of the support structure.

[0036] In any of the above embodiments, it is preferred that the truss support unit includes a vertically arranged vertical steel structure truss 2, the bottom of the vertical steel structure truss 2 is pre-embedded and fixed below the ground, the top of the vertical steel structure truss 2 is fixed to the bottom of the steel bridge deck 1, and a support connecting plate seat 3 is horizontally fixedly welded to the upper outer wall of the vertical steel structure truss 2. The left and right ends of the support connecting plate seat 3 are bolted and fixed to the steel bridge deck 1 by a number of bolts 4.

[0037] The vertical steel truss 2, as the core component of the truss support unit, is connected to the bottom of the bridge deck by bolts via welded support connecting plate 3, forming a rigid node. The bolted connection allows for some assembly error while providing reliable shear bearing capacity. The steel truss combines high strength with lightweight design, facilitating on-site installation. The support connecting plate 3 expands the connection area with the bridge deck through horizontal extension, reducing local stress concentration. The bolted connection 4 allows for rapid assembly and disassembly, improving construction efficiency and facilitating later maintenance and replacement. The entire unit bears the main vertical load transfer, providing reliable end connection nodes while balancing construction convenience and structural safety.

[0038] In any of the above embodiments, it is preferred that the vertical central unit includes a central steel column 5 vertically and coaxially arranged in the inner cavity of the vertical steel structure truss 2. The bottom of the central steel column 5 is pre-embedded and fixed below the ground. The top of the central steel column 5 is fixed to the bottom of the steel bridge plate 1. An upper seat 6 and a lower seat 7 are respectively installed on the top and bottom of the steel bridge plate 1 above the casting cavity of the central steel column 5. A casting anti-detachment connection component is provided inside the casting cavity. The top of the casting anti-detachment connection component passes through the through hole on the lower seat 7, the steel bridge plate 1, and is fixedly connected to the bottom of the upper seat 6.

[0039] The central steel pipe column 5 serves as the main body of the vertical central unit. It is fixed to the bridge plate through the upper seat 6 and the lower seat 7, forming an upper and lower constraint. The anti-detachment connecting component is poured through the bridge plate, and the central steel pipe column 5 and the bridge plate are integrated by pouring concrete.

[0040] The central steel tube column 5 is coaxially arranged with the truss support unit to form a combined section of "outer truss + inner steel tube", which improves the overall bending stiffness; the upper seat 6 and the lower seat 7 restrict the horizontal displacement of the top of the central steel tube column 5 and enhance the verticality of the support; the cast anti-detachment connection component is mechanically anchored to the concrete to prevent slippage and ensure effective load transfer.

[0041] In any of the above embodiments, it is preferred that the anti-detachment connection component includes an anti-detachment column 8 vertically and coaxially arranged inside the casting cavity of the central steel pipe. The top of the anti-detachment column 8 movably passes through the lower seat 7 and the steel bridge plate 1 and is fixedly connected to the top of the upper seat 6. Several wedge-shaped anti-detachment teeth 9 are integrally formed and fixed from top to bottom on the lower outer wall of the anti-detachment column 8. A concrete reinforcement column 10 is cast and formed by pouring concrete inside the casting cavity. The bottom of the concrete reinforcement column 10 is flush with the bottom of the central steel pipe.

[0042] The anti-detachment column 8 penetrates the bridge plate and is fixed through the upper seat 6, forming a vertical force transmission path; the wedge-shaped anti-detachment tooth 9 is embedded in the concrete reinforcement column 10, using the mechanical interlocking action of the tooth-shaped protrusion to resist the pull-out force between the concrete and the steel plate of the steel bridge; the concrete reinforcement column 10 fills the space inside the tube and works together with the anti-detachment column 8 and the central steel tube column 5.

[0043] In addition, the wedge-shaped anti-detachment teeth 9 increase the interface friction between the concrete and the anti-detachment column 8, effectively preventing the concrete from falling off; the concrete reinforcement column 10 transfers the load through compression, while utilizing the fire resistance of the concrete to improve the durability of the anti-detachment column 8; the anti-detachment column 8 and the central steel pipe column 5 form a double vertical load-bearing component, increasing the redundancy of the central support.

[0044] In any of the above embodiments, it is preferred that an integral helical tube 11 for horizontal reinforcement to pass through is integrally formed in the middle of the anti-detachment column 8, and an internal thread is provided inside the central cavity of the integral helical tube 11.

[0045] The integrated threaded tube 11 serves as the installation interface for the horizontal reinforcement component. It engages with the horizontal reinforcement component via an internal thread. The horizontal reinforcement component passes through the side wall of the central steel column 5, connecting the anti-detachment column 8 to the external truss support unit. The horizontal reinforcement component, connected by the integrated threaded tube 11, forms a lateral constraint, limiting the horizontal displacement of the anti-detachment column 8 and enhancing the central support's resistance to wind and vehicle vibration. The integrated molding of the threaded tube avoids weakening the anti-detachment column 8 due to subsequent drilling, ensuring structural integrity.

[0046] In any of the above embodiments, it is preferred that the side support includes a diagonal bracing plate 12 disposed on one side of the vertical steel truss 2, the upper part of the diagonal bracing plate 12 being bolted to the bottom of the support connecting plate seat 3, and the lower part of the diagonal bracing plate 12 being bolted to the corresponding side wall of the vertical steel truss 2.

[0047] The diagonal bracing plate 12 connects the support connecting plate seat 3 and the truss side wall at an inclined angle to form a triangular support structure; the upper part is connected to the bottom of the connecting plate seat by bolts, and the lower part is connected to the truss side wall by bolts to transmit the diagonal axial force.

[0048] Example 2: Compared with Example 1, this example also includes the following technical features:

[0049] In any of the above embodiments, it is preferred that the horizontal reinforcement component includes a horizontally arranged double-headed reinforcing stud 13. The double-headed reinforcing stud 13 is screwed into the central cavity of the integral spiral tube 11, and both ends of the stud 13 move through the grouting holes 15 on the outer side walls of the central steel tube and extend to the outside of the vertical steel truss 2. End anti-loosening nuts 14 are screwed onto the outer side walls of both ends of the double-headed reinforcing stud 13.

[0050] The double-ended reinforcing stud 13 is connected to the integral threaded tube 11 and the end anti-loosening nut 14 through the threads at both ends to form a horizontal connecting piece that passes through the central steel pipe column 5 and the truss support unit; the grout pouring hole 15 is used for concrete pouring and also serves as a channel for the stud to pass through.

[0051] Specifically, the double-ended stud is fixed by nuts at both ends, which rigidly connects the central steel tube column 5 to the truss support unit to form a "inner tube-outer truss" load-bearing structure; the end anti-loosening nut 14 fixes the adjustable stud preload, eliminates the assembly gap between components, and improves the overall rigidity; the grout pouring hole 15 forms a sealed node after the concrete is poured.

[0052] In any of the above embodiments, it is preferred that the bottom of the central steel column 5 is located below the bottom of the vertical steel truss 2.

[0053] The central steel column 5 extends to below the bottom of the truss support unit, making the foundation depth of the central support greater than that of the end supports, forming a combined foundation of "deep pile + shallow pile". The deeper embedment depth enhances the pull-out resistance and horizontal slip resistance of the central steel column 5, especially in soft soil foundations, reducing the overall differential settlement of the structure; the staggered arrangement at the bottom avoids conflict between the two foundations underground, optimizing the distribution of foundation stress.

[0054] In any of the above embodiments, it is preferred that both of the grouting holes 15 are used to allow concrete grout pushed in by external high pressure to enter the pouring cavity.

[0055] Concrete is pumped into the pouring cavity under high pressure to fill the gap between the central steel pipe column 5 and the anti-detachment column 8, forming a dense concrete reinforced column 10; high-pressure construction ensures that the concrete fills the complex internal cavity and avoids air bubbles remaining.

[0056] In any of the above embodiments, it is preferred that the lower protective component includes a lower restraint steel sleeve 16 fixedly sleeved on the lower outer wall of the vertical steel structure truss 2, and the bottom of the lower restraint steel sleeve 16 is pre-embedded and fixed below the ground.

[0057] The lower restraint steel sleeve 16 wraps around the lower part of the truss support unit and is fixed to the foundation by pre-embedded concrete at the bottom, forming a ring restraint on the lower part of the vertical steel structure truss 2; the lower restraint steel sleeve 16 and the vertical steel structure truss 2 are connected by welding or bolts to transfer the restraint force.

[0058] 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. 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. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0059] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A steel bridge deck support structure, characterized in that: The system includes truss support units, the top of which is fixedly supported at the bottom of the corresponding steel bridge deck. The bottom of the truss support unit is pre-embedded, cast, and fixed below the ground. A vertical center unit is installed within the internal space of the truss support unit, and the vertical center unit is coaxially arranged with the truss support unit. The bottom of the vertical center unit is pre-embedded and fixed below the ground, and the top of the vertical center unit is fixed to the bottom of the steel bridge deck. Side supports are installed on the left and right sides of the truss support unit, and a lower protective component is fixedly installed on the lower periphery of the truss support unit, with the bottom of the lower protective component fixed to the ground.

2. The steel bridge deck support structure according to claim 1, characterized in that: The truss support unit includes a vertically arranged steel structure truss. The bottom of the vertical steel structure truss is pre-embedded and fixed below the ground. The top of the vertical steel structure truss is fixed to the bottom of the steel bridge deck. A support connecting plate seat is horizontally fixed and welded to the upper outer wall of the vertical steel structure truss. Both ends of the support connecting plate seat are bolted to the steel bridge deck by several bolts.

3. The steel bridge deck support structure according to claim 2, characterized in that: The vertical central unit includes a central steel column that is vertically and coaxially arranged in the inner cavity of the vertical steel structure truss. The bottom of the central steel column is pre-embedded and fixed below the ground. The top of the central steel column is fixed to the bottom of the steel bridge plate. An upper seat and a lower seat are respectively installed on the top and bottom of the steel bridge plate above the casting cavity of the central steel column. A casting anti-detachment connection component is provided inside the casting cavity. The top of the casting anti-detachment connection component passes through the through hole on the lower seat, the steel bridge plate, and is fixedly connected to the bottom of the upper seat.

4. The steel bridge deck support structure according to claim 3, characterized in that: The anti-detachment connection component includes an anti-detachment column that is vertically and coaxially arranged inside the casting cavity of the central steel pipe. The top of the anti-detachment column moves through the lower seat and the steel bridge plate and is fixedly connected to the top of the upper seat. Several wedge-shaped anti-detachment teeth are integrally formed and fixed on the lower outer wall of the anti-detachment column from top to bottom. A concrete reinforcement column is cast inside the casting cavity, and the bottom of the concrete reinforcement column is flush with the bottom of the central steel pipe.

5. A steel bridge deck support structure according to claim 4, characterized in that: An integrally formed spiral tube for horizontal reinforcement members to pass through is integrally formed in the middle of the anti-detachment column, and an internal thread is provided inside the central cavity of the integral spiral tube.

6. The steel bridge deck support structure according to claim 5, characterized in that: The horizontal reinforcement component includes a horizontally arranged double-headed reinforcing stud. The double-headed reinforcing stud is screwed into the central cavity of the integral spiral tube, and both ends of the stud can move through the grouting holes on the outer side walls of the central steel tube and extend to the outside of the vertical steel truss. End anti-loosening nuts are screwed onto the outer side walls of both ends of the double-headed reinforcing stud.

7. A steel bridge deck support structure according to claim 6, characterized in that: The side bracing member includes a diagonal bracing plate disposed on one side of the vertical steel structure truss. The upper part of the diagonal bracing plate is bolted to the bottom of the support connecting plate seat, and the lower part of the diagonal bracing plate is bolted to the corresponding side wall of the vertical steel structure truss.

8. A steel bridge deck support structure according to claim 7, characterized in that: The bottom of the central steel tube column is located below the bottom of the vertical steel truss.

9. A steel bridge deck support structure according to claim 8, characterized in that: Both of the grout pouring holes are used to allow concrete grout pushed in by external high pressure to enter the pouring cavity.

10. A steel bridge deck support structure according to claim 9, characterized in that: The lower protective component includes a lower restraint steel sleeve that is fixedly fitted onto the lower outer wall of the vertical steel structure truss, and the bottom of the lower restraint steel sleeve is pre-embedded and fixed below the ground.

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