Steel-concrete composite beam cast-in-place bridge deck slab supporting structure

Abstract

The utility model provides a steel-concrete composite beam cast-in-place bridge deck slab supporting structure which comprises a plurality of steel plate beams with the two ends supported on bridge piers, a plurality of pairs of hanging rings are arranged between the adjacent steel plate beams, two hanging rings in one pair of hanging rings are prefabricated on the edges of the two steel plate beams respectively, and the hanging rings extend in the extending direction of the steel plate beams. The lifting rings at the same end are arranged at the two ends of the middle main beam in a sleeving mode, a plurality of middle transverse distribution beams are laid on the main beam, the steel plate beam comprises a top plate, a bottom plate and a vertical plate connecting the bottom plate and the top plate together, and middle supporting pads are laid on the middle transverse distribution beams. The steel plate beam and the middle supporting pad form a bridge deck slab bottom formwork. The utility model has the advantage that the construction of the cast-in-place bridge deck of the steel-concrete composite beam can be completed without erecting a support frame on site, and solves the problem that the existing cast-in-place bridge deck of the steel-concrete composite beam needs to erect a support structure supported on the ground on site for construction.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a support structure for cast-in-place bridge deck of steel-concrete composite beam. Background Technology

[0002] Steel-concrete composite beams, as a structural form for bridges, are increasingly widely used in the construction of new bridges spanning existing roads and rivers. In engineering practice, on-site scaffolding support technology is frequently used. However, this technology is inconvenient, has a high risk factor, and is time-consuming, labor-intensive, and resource-intensive. Therefore, how to meet construction quality requirements while effectively addressing the issue of scaffolding support point placement is a key challenge that engineers need to solve. Utility Model Content

[0003] This utility model aims to provide a support structure for cast-in-place bridge decks of steel-concrete composite beams that enables construction of cast-in-place bridge decks without the need for on-site support scaffolding. This solves the problem that existing cast-in-place bridge decks of steel-concrete composite beams require on-site construction of support structures on the ground, which is time-consuming and affects ground traffic.

[0004] To achieve the above objectives, this utility model employs the following technology: a cast-in-place bridge deck support structure for a steel-concrete composite beam, comprising several steel plate beams supported at both ends on bridge piers, the steel plate beams being distributed along the transverse direction of the bridge and extending along the longitudinal direction of the bridge. The characteristic feature is that several pairs of lifting rings are provided between adjacent steel plate beams, with two rings in each pair prefabricated on the edges of the two steel plate beams. The lifting rings extend along the extension direction of the steel plate beams, and the lifting rings at the same end are fitted onto both ends of the central main beam. Several central transverse distribution beams are laid on the main beams. Each steel plate beam includes a top plate, a bottom plate, and a vertical plate connecting the bottom plate and the top plate. Central support pads are laid on the central transverse distribution beams. The steel plate beams and the central support pads constitute the bottom template of the bridge deck, allowing the cast-in-place bridge deck to be supported on the central support pads and the steel plate beams. This technical solution eliminates the need to construct supports for the central support pads during bridge deck casting, and the prefabricated lifting rings on the steel plate beams facilitate rapid and convenient construction of the steel-concrete structure at the upper end of the bridge.

[0005] Preferably, the central main beam is an I-beam structure.

[0006] Preferably, the middle crossbeam is made of wood.

[0007] Preferably, the middle support pad is made of bamboo.

[0008] Preferably, the outer side of the edge steel plate girder is connected to several inclined support frames distributed along the extension direction of the steel plate girder. Each inclined support frame is equipped with several vertical supports that can be raised and lowered. These vertical supports are distributed along the transverse direction of the bridge. All the inclined support frames, with their vertical supports aligned on the same straight line along the extension direction of the steel plate girder, are supported below the same edge main girder. The edge main girder is supported below several edge transverse distribution beams, which are distributed along the extension direction of the steel plate girder. Edge support pads are laid on these transverse distribution beams. The inclination of the edge support pads can be changed by adjusting the vertical supports, thus solving the problem of adjustable formwork cross slope. This allows for precise adjustment of the bridge deck edge cross slope, ensuring construction quality.

[0009] Preferably, the inclined support frame includes a horizontal support connected at one end and an inclined support located below the horizontal support, with the other end of the horizontal support and the other end of the inclined support connected to the steel plate beam. This provides reliable support and a simple structure.

[0010] Preferably, the outer side of the vertical plate of the steel plate beam located at the edge is provided with an upper connecting block with an upper connecting hole and a lower connecting block with a lower connecting hole. The upper bolt passes through the horizontal support and the upper connecting hole and is connected to the upper nut to connect the horizontal support to the steel plate beam. The lower bolt passes through the diagonal support and the lower connecting hole and is connected to the lower nut to connect the diagonal support to the steel plate beam. This design facilitates disassembly.

[0011] Preferably, the two ends of the central main beam are supported on the upper ends of two vertical plastic plates, and the lower ends of the two vertical plastic plates are supported on the bottom plates of two adjacent steel plate beams. A casting cavity is formed between the steel plate beams and the vertical plastic plates. A casting gap is provided between the central support pad and the steel plate beam for pouring concrete into the casting cavity. In use, concrete passes through the casting cavity hinge to the casting cavity, thereby wrapping the surface of the steel plate beam and preventing corrosion of the steel plate beam after the paint peels off.

[0012] Preferably, the upper end of the vertical plastic sheet is provided with an outward flange, which extends to the lower part of the middle support pad. The outward flange and the top plate form a concrete entry channel that connects the pouring cavity and the pouring gap. In use, the concrete fills the concrete entry channel and the pouring gap, so that the surface of the upper steel beam is maximized and the vertical plastic sheet can also effectively prevent the concrete surface layer of the steel beam from detaching.

[0013] Preferably, the lifting ring includes two upper connecting lugs connected to the top plate and a "U"-shaped support fork. The two ends of the support fork are provided with lower connecting lugs. Two suspension screws are correspondingly inserted through the two upper connecting lugs and the lower connecting lugs. The upper end of the suspension screws is connected to a suspension nut that hangs on the upper connecting lug and a support nut that supports the lower connecting lug. After the pouring is completed, the support nut is moved down to lower the support fork, thereby lowering the middle main beam and the middle transverse distribution beam. Then, the middle main beam, the middle transverse distribution beam and the middle support pad are removed.

[0014] Beneficial effects: Traditional steel-concrete composite beam bridges rely on ground support systems for the cast-in-place bridge deck, which is slow and consumes a lot of materials and labor. This utility model is simple to construct and saves labor and materials.

[0015] Traditional steel-concrete composite beam cast-in-place bridge deck support systems involve long working hours at heights, high safety risks, and significant challenges in quality control during installation. This utility model features simple construction steps, effectively reducing construction risks and enhancing construction quality.

[0016] The formwork at the cantilever section uses a spiral adjustable base instead of the traditional method of using wooden blocks to solve the cross slope of the formwork. This allows for precise adjustment of the bridge deck cross slope and ensures construction quality. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of Embodiment 1 of the present invention;

[0018] Figure 2 for Figure 1 A magnified view of a portion of point A;

[0019] Figure 3 This is a cross-sectional schematic diagram of Embodiment 2 of the present invention;

[0020] Figure 4 for Figure 3 A magnified view of part B.

[0021] In the diagram: 1. Steel plate beam; 2. Top plate; 3. Bottom plate; 4. Vertical plate; 5. Lifting ring; 6. Middle main beam; 7. Middle horizontal distribution beam; 8. Middle support pad; 9. Diagonal support frame; 10. Vertical support; 11. Edge main beam; 12. Edge horizontal distribution beam; 13. Edge support pad; 14. Horizontal support; 15. Diagonal support; 16. Horizontal support; 17. Upper connecting block; 18. Lower connecting block; 19. Vertical plastic plate; 20. Pouring cavity; 21. Pouring gap; 22. Outward flange; 23. Concrete entry channel; 24. Upper connecting ear; 25. Support fork; 26. Lower connecting ear; 27. Suspension screw; 28. Suspension nut; 29. ​​Support nut. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] See Example 1 Figure 1 and Figure 2 A cast-in-place bridge deck support structure for steel-concrete composite beams includes several steel plate beams 1 supported at both ends on piers. The steel plate beams are distributed transversely and extend longitudinally. Each steel plate beam includes a top plate 2, a bottom plate 3, and vertical plates 4 connecting the bottom plate and the top plate. Several pairs of lifting rings 5 ​​are provided between adjacent steel plate beams. Two of the lifting rings in each pair are prefabricated on the edges of the top plates of the two steel plate beams, extending along the extension direction of the steel plate beams. The lifting rings at the same end are fitted onto both ends of the intermediate main beam 6. Several intermediate transverse distribution beams 7 are laid on the main beams. Intermediate support pads 8 are laid on the intermediate transverse distribution beams. The steel plate beams and intermediate support pads constitute the bottom template of the bridge deck, so that the cast-in-place bridge deck is supported on the intermediate support pads and steel plate beams. This technical solution eliminates the need to build scaffolds to support the intermediate support pads when casting the bridge deck, and the lifting rings are prefabricated on the steel plate beams, making the construction of the upper steel-concrete structure bridge convenient and fast. The central main beam is an I-beam structure. The central transverse beams are made of wood. The central support pads are made of bamboo.

[0024] The outer side of the edge steel plate girder is connected to several inclined support frames 9 distributed along the extension direction of the steel plate girder. Several vertical supports 10, which can be raised and lowered, are provided on the inclined support frames. The vertical supports are distributed along the transverse direction of the bridge. All the vertical supports of the inclined support frames, which are located on the same straight line along the extension direction of the steel plate girder, are supported below the same edge main beam 11. The edge main beam is supported below several edge transverse distribution beams 12, which are distributed along the extension direction of the steel plate girder. Edge support pads 13 are laid on the edge transverse distribution beams. In use, the concrete hinge shaft forms the edge of the bridge surface on the edge support pads. The inclination of the edge support pads can be changed by adjusting the vertical supports, thereby solving the problem of adjustable formwork cross slope. This allows for precise adjustment of the bridge deck edge cross slope, ensuring construction quality.

[0025] The inclined support frame includes a horizontal support 14 connected at one end and an inclined support 15 located below the horizontal support. The other end of the horizontal support and the other end of the inclined support are connected to the steel plate beam. Specifically, an upper connecting block 16 with an upper connecting hole and a lower connecting block 17 with a lower connecting hole are provided on the outer side of the vertical plate of the steel plate beam located at the edge. The upper bolt passes through the horizontal support and the upper connecting hole and is connected to the upper nut to connect the horizontal support to the steel plate beam. The lower bolt passes through the inclined support and the lower connecting hole and is connected to the lower nut to connect the inclined support to the steel plate beam.

[0026] Example 2 differs from Example 1 in that:

[0027] See Figure 3 and Figure 4 The two ends of the central main beam are supported by the upper ends of two vertical plastic plates 18, and the lower ends of the two vertical plastic plates are supported by the bottom plates of two adjacent steel plate beams. A pouring cavity 19 is formed between the steel plate beams and the vertical plastic plates. A pouring gap 20 is provided between the central support pad and the steel plate beam for pouring concrete into the pouring cavity. In use, concrete enters the pouring cavity through the hinge of the pouring cavity, thereby wrapping the surface of the steel plate beam and preventing corrosion after the paint peels off. The upper end of the vertical plastic plate is provided with an outward flange 21, which extends to the lower part of the central support pad. A concrete entry channel 22 is formed between the outward flange and the top plate, connecting the pouring cavity and the pouring gap. In use, concrete fills the concrete entry channel and the pouring gap, thereby maximizing the wrapping of the upper steel plate beam surface and effectively preventing the vertical plastic plate from detaching from the concrete surface layer of the steel plate beam. The lifting ring includes two upper connecting lugs 23 connected to the top plate along the longitudinal direction of the bridge and a "U"-shaped support fork 24. The two ends of the support fork are provided with lower connecting lugs 25. Two suspension screws 26 are correspondingly inserted through the two upper and lower connecting lugs. The upper end of the suspension screw is connected to a suspension nut 27 that is suspended on the upper connecting lug and a support nut 28 that is supported on the lower connecting lug. After the pouring is completed, the support nut is moved down to lower the support fork, thereby lowering the middle main beam and the middle transverse distribution beam. Then the middle main beam, the middle sub-beam and the middle support pad are removed.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A cast-in-situ bridge deck slab support structure of a steel-concrete composite beam, comprising a plurality of steel plate beams supported at both ends on piers, the steel plate beams being distributed in a transverse direction of the bridge, the steel plate beams extending in a longitudinal direction of the bridge, characterized in that, A plurality of pairs of lifting rings are arranged between adjacent steel plate beams, two lifting rings in one pair of lifting rings are respectively prefabricated on edges of two steel plate beams, the lifting rings extend along the extension direction of the steel plate beams, the lifting rings in the same end lifting ring are sleeved on two ends of the intermediate main beam, a plurality of intermediate transverse distribution beams are arranged on the main beam, the steel plate beam comprises a top plate, a bottom plate and a vertical plate connecting the bottom plate and the top plate together, and an intermediate supporting pad is arranged on the intermediate transverse distribution beam; the steel plate beam and the intermediate supporting pad form a bridge deck bottom formwork, so that the cast bridge deck is supported on the intermediate supporting pad and the steel plate beam.

2. The steel-concrete composite beam cast-in-situ deck slab support structure according to claim 1, characterized in that, The intermediate main beam is an I-shaped steel structure.

3. The steel-concrete composite beam cast-in-situ deck slab support structure according to claim 1, characterized in that, The intermediate transverse distribution beam is a wood structure.

4. The steel-concrete composite beam cast-in-situ deck slab support structure according to claim 1, characterized in that, The intermediate supporting pad is made of bamboo.

5. The steel-concrete composite beam cast-in-situ deck slab support structure according to claim 1 or 2 or 3 or 4, characterized in that, Two ends of the intermediate main beam are supported on upper ends of two vertical plastic plates, lower ends of the two vertical plastic plates are supported on the bottom plates of the adjacent two steel plate beams, the steel plate beams and the vertical plastic plates form a pouring cavity, and a pouring gap is arranged between the intermediate supporting pad and the steel plate beam for pouring concrete into the pouring cavity.

6. The steel-concrete composite beam cast-in-situ deck slab support structure according to claim 5, characterized in that, An outward turning edge is arranged at the upper end of the vertical plastic plate, the outward turning edge extends below the intermediate supporting pad, and the outward turning edge and the top plate form a concrete entering channel communicating the pouring cavity and the pouring gap.

7. The steel-concrete composite beam cast-in-situ deck slab support structure according to claim 1 or 2 or 3 or 4, characterized in that, The lifting ring comprises two upper connecting ears connected to the top plate and a "U"-shaped supporting fork, lower connecting ears are arranged at two ends of the supporting fork, two suspension screws are correspondingly arranged on the two upper connecting ears and the lower connecting ears, and upper ends of the suspension screws are connected with a suspension nut suspended on the upper connecting ear and a supporting nut supported on the lower connecting ear.

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