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

Abstract

The invention provides a steel-concrete composite beam cast-in-place bridge deck slab supporting method which is completed through a steel-concrete composite beam cast-in-place bridge deck slab supporting structure, the steel-concrete composite beam cast-in-place bridge deck slab supporting structure comprises a plurality of steel plate beams with the two ends supported on piers, and a plurality of pairs of hanging rings are arranged between the adjacent steel plate beams. Two hanging rings in the pair of hanging rings are prefabricated on the edges of the two steel plate beams respectively, the hanging rings extend in the extending direction of the steel plate beams, the hanging rings in the hanging rings at the same end are arranged at the two ends of a middle main beam in a sleeving mode, a middle transverse distribution beam is laid on the main beam, and a middle supporting pad is laid on the middle transverse distribution beam; the steel plate beam and the middle supporting pad form a bridge deck slab bottom formwork, and the poured bridge deck slab is supported on the middle supporting pad and the steel plate beam. The method has the advantage that construction of the cast-in-place bridge deck of the steel-concrete composite beam can be completed without erecting a supporting frame on site, and the problem that an existing steel-concrete composite beam cast-in-place bridge deck needs to be constructed by erecting a supporting structure supported on the ground on site is solved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a method for supporting a cast-in-situ bridge deck of a steel-concrete composite beam. Background Art

[0002] As a structural form of bridges, steel-concrete composite beams are increasingly widely used in the construction of new bridges across existing roads and rivers. In engineering practice, on-site support construction technology is often used. This technology is inconvenient to construct, has a high risk factor, and consumes time, manpower, and material resources. Therefore, how to better solve the problem of support point setting while meeting construction quality requirements is a difficult problem that engineers need to focus on solving. Summary of the invention

[0003] The present invention aims to provide a method for supporting cast-in-place bridge decks of steel-concrete composite beams, which can realize the construction of cast-in-place bridge decks of steel-concrete composite beams without setting up support frames on site, thereby solving the problem that the existing cast-in-place bridge decks of steel-concrete composite beams need to build a support structure on the ground on site for construction, which is time-consuming and affects ground traffic.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technology: a method for supporting a cast-in-place bridge deck of a steel-concrete composite beam, characterized in that it is completed by a cast-in-place bridge deck supporting structure of a steel-concrete composite beam, the cast-in-place bridge deck supporting structure of the steel-concrete composite beam comprising a plurality of steel plate beams supported on bridge piers at both ends, the steel plate beams are distributed along the transverse direction of the bridge, the steel plate beams extend along the longitudinal direction of the bridge, a plurality of pairs of lifting rings are arranged between adjacent steel plate beams, two lifting rings in a pair of lifting rings are respectively prefabricated on the edges of the 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 rings are sleeved on the two ends of the middle main beam, a plurality of middle cross distribution beams are laid on the main beam, the steel plate beams include a top plate, a bottom plate and a vertical plate connecting the bottom plate with the top plate, and a middle supporting pad is laid on the middle cross distribution beam; the steel plate beams and the middle supporting pads constitute the bottom template of the bridge deck, so that the cast bridge deck is supported on the middle supporting pads and the steel plate beams. This technical solution does not require the construction of a bracket to support the middle support pad when casting the bridge deck, and the lifting ring is prefabricated on the steel plate beam, so that the upper end of the steel-concrete structure bridge is convenient and fast to manufacture.

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

[0006] Preferably, the middle cross beam is a wooden structure.

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

[0008] Preferably, the outer side of the steel plate beam at the edge is connected with several oblique support frames distributed along the extension direction of the steel plate beam, and the oblique support frames are provided with several vertical supports that can be raised and lowered, and the vertical supports are distributed along the transverse direction of the bridge, and the vertical supports of all oblique support frames located on the same straight line along the extension direction of the steel plate beam are supported under the same edge main beam, and the edge main beam is supported under several edge transverse distribution beams, and the edge transverse distribution beams are distributed along the extension direction of the steel plate beam, and the edge transverse distribution beams are paved with edge support pads. The inclination of the edge support pad can be changed by adjusting the vertical support, thereby solving the problem of adjustable template transverse slope, so that the transverse slope of the bridge deck edge can be accurately adjusted to ensure construction quality.

[0009] Preferably, the oblique support frame comprises a transverse support connected at one end and an oblique support located below the transverse support, and the other end of the transverse support and the other end of the oblique support are connected to the steel plate beam, so that the support is reliable and the structure is simple.

[0010] Preferably, an upper connection block with an upper connection hole and a lower connection block with a lower connection hole are provided on the outer side of the middle plate of the steel plate beam at the edge, and an upper bolt passes through the transverse support and the upper connection hole and is connected with an upper nut to connect the transverse support with the steel plate beam, and a lower bolt passes through the oblique support and the lower connection hole and is connected with a nut to connect the oblique support with the steel plate beam. Disassembly is convenient.

[0011] Preferably, both ends of the middle 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 beams. A casting cavity is formed between the steel beam and the vertical plastic plates, and a casting gap is provided between the middle supporting pad and the steel beam for pouring concrete into the hinge gap. When in use, the concrete is hinged through the hinge gap into the casting cavity, thereby wrapping the surface of the steel beam, thereby preventing the steel beam from rusting after the paint is removed.

[0012] Preferably, an outer flange is provided at the upper end of the vertical plastic plate, and the outer flange is extended to the bottom of the middle supporting pad. A concrete entry channel connecting the casting cavity and the casting gap is formed between the outer flange and the top plate. When in use, the concrete fills the concrete entry channel and the casting gap, so that the surface of the upper steel plate beam is wrapped to the maximum extent, and the vertical plastic plate can be effectively prevented from separating from the concrete surface layer of the steel plate beam.

[0013] Preferably, the lifting ring includes two upper connecting ears connected to the top plate and a "U"-shaped supporting fork, lower connecting ears are provided at both ends of the supporting fork, and two suspension screws are correspondingly passed through the two upper connecting ears and the lower connecting ears, and the upper ends of the suspension screws are connected with suspension nuts suspended on the upper connecting ears and supporting nuts supported on the lower connecting ears; after pouring is completed, the supporting nuts are moved downward to make the supporting fork descend, thereby making the middle main beam and the middle cross distribution beam descend, and then the middle main beam, the middle distribution beam and the middle supporting pad are removed.

[0014] Beneficial effects: The traditional steel-concrete composite beam cast-in-place bridge deck is constructed by a ground support system, which is slow to construct and consumes huge materials and labor. The present invention is simple to construct and saves labor and materials. The traditional steel-concrete composite beam cast-in-place bridge deck support system takes a long time to work at high altitude, has high safety risks, and is difficult to control the quality of the installation process. The construction steps of the present invention are simple, which effectively reduces the construction risks and enhances the construction quality. The cantilever formwork uses a spiral adjustment base to replace the traditional construction method of using wooden blocks to solve the cross slope of the formwork. This can accurately adjust the cross slope of the bridge deck and ensure construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the cross-sectional intention of the steel-concrete composite beam cast-in-place bridge deck support structure example 1; Figure 2 for Figure 1 A local enlarged schematic diagram of point A; Figure 3 It is a cross-sectional schematic diagram of the second embodiment of the steel-concrete composite beam cast-in-situ bridge deck support structure; Figure 4 for Figure 3 A local enlarged schematic diagram of point B.

[0016] In the figure: steel plate beam 1, top plate 2, bottom plate 3, vertical plate 4, lifting ring 5, middle main beam 6, middle transverse distribution beam 7, middle supporting pad 8, oblique support frame 9, vertical support 10, edge main beam 11, edge transverse distribution beam 12, edge supporting pad 13, transverse support 14, oblique support 15, transverse support, upper connecting block 16, lower connecting block 17, vertical plastic board 18, casting cavity 19, casting gap 20, outer flange 21, concrete entry channel 22, upper connecting ear 23, supporting fork 24, lower connecting ear 25, suspension screw 26, suspension nut 27, supporting nut 28. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1 See Figure 1 and Figure 2 A method for supporting a cast-in-place bridge deck of a steel-concrete composite beam is completed by a cast-in-place bridge deck supporting structure of a steel-concrete composite beam. The cast-in-place bridge deck supporting structure of a steel-concrete composite beam includes a plurality of steel plate beams 1 supported on bridge piers at both ends. The steel plate beams are distributed along the transverse direction of the bridge and extend along the longitudinal direction of the bridge. The steel plate beams include a top plate 2, a bottom plate 3 and a vertical plate 4 connecting the bottom plate with the top plate. A plurality of pairs of lifting rings 5 ​​are arranged between adjacent steel plate beams. Two lifting rings in a pair of lifting rings are respectively prefabricated on the edges of the top plates of the 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 both ends of the middle main beam 6. A plurality of middle cross distribution beams 7 are laid on the main beam. A middle support pad 8 is laid on the middle cross distribution beam. The steel plate beam and the middle support pad constitute the bottom template of the bridge deck, so that the cast bridge deck is supported on the middle support pad and the steel plate beam. This technical solution does not require the construction of a bracket to support the middle support pad when pouring the bridge deck, and the lifting ring is prefabricated on the steel plate beam, so that the upper end is convenient and fast to make a steel-concrete bridge. The middle main beam is an I-beam structure. The middle cross beam is a wooden structure. The middle support pad is made of bamboo.

[0019] The outer side of the steel plate beam at the edge is connected with several inclined support frames 9 distributed along the extension direction of the steel plate beam. The inclined support frames are provided with several vertical supports 10 that can be raised and lowered. The vertical supports are distributed along the transverse direction of the bridge. The vertical supports of all the inclined support frames located on the same straight line along the extension direction of the steel plate beam are supported under the same edge main beam 11. The edge main beam is supported under several edge transverse distribution beams 12. The edge transverse distribution beams are distributed along the extension direction of the steel plate beam. The edge transverse distribution beams are paved with edge support pads 13. When in use, the concrete hinge shaft forms the edge of the bridge surface on the edge support pad. The slope of the edge support pad can be changed by adjusting the vertical support, thereby solving the problem of adjustable template transverse slope. In this way, the transverse slope of the bridge deck edge can be accurately adjusted to ensure construction quality.

[0020] The inclined support frame includes a transverse support 14 connected together at one end and an inclined support 15 located below the transverse support, and the other end of the transverse 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 middle plate of the steel plate beam located at the edge, and the upper bolt passes through the transverse support and the upper connecting hole and is connected together with the upper nut to connect the transverse support and the steel plate beam together, and the lower bolt passes through the inclined support and the lower connecting hole and is connected together with the nut to connect the inclined support and the steel plate beam together.

[0021] Embodiment 2 is different from Embodiment 1 in that: See also Figure 3 and Figure 4 The two ends of the middle main beam are supported on the upper ends of the two vertical plastic plates 18, and the lower ends of the two vertical plastic plates are supported on the bottom plates of the two adjacent steel beams. A casting cavity 19 is formed between the steel beam and the vertical plastic plates. A casting gap 20 is provided between the middle support pad and the steel beam for pouring concrete into the hinge gap. When in use, the concrete passes through the hinge gap and hinges into the casting cavity, thereby wrapping the surface of the steel beam, thereby preventing the steel beam from rusting after the paint is removed. The upper end of the vertical plastic plate is provided with an outer flange 21, and the outer flange is colored to the bottom of the middle support pad. A concrete entry channel 22 connecting the casting cavity and the casting gap is formed between the outer flange and the top plate. When in use, the concrete fills the concrete entry channel and the casting gap, so that the surface of the upper steel beam is wrapped to the maximum extent, and the vertical plastic plate can also be effectively prevented from being separated from the concrete surface layer of the steel beam. The lifting ring includes two upper connecting ears 23 connected to the top plate and distributed along the longitudinal bridge direction, and a "U"-shaped supporting fork 24, with lower connecting ears 25 provided at both ends of the supporting fork. Two suspension screws 26 are correspondingly arranged on the two upper connecting ears and the lower connecting ears, and the upper ends of the suspension screws are connected with suspension nuts 27 suspended on the upper connecting ears and supporting nuts 28 supported on the lower connecting ears; after the pouring is completed, the supporting nuts are moved downward to make the supporting fork descend, thereby making the middle main beam and the middle cross distribution beam descend, and then the middle main beam, the middle distribution beam and the middle supporting pad are removed.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for supporting a cast-in-place bridge deck of a steel-concrete composite beam, characterized in that: It is completed by a steel-concrete composite beam cast-in-place bridge deck support structure, which includes a plurality of steel plate beams supported on bridge piers at both ends, the steel plate beams are distributed along the transverse direction of the bridge, and the steel plate beams extend along the longitudinal direction of the bridge, and a plurality of pairs of lifting rings are arranged between adjacent steel plate beams, two lifting rings in a pair of lifting rings are respectively prefabricated on the edges of the two steel plate beams, and the lifting rings extend along the extension direction of the steel plate beams, and the lifting rings in the same end lifting rings are sleeved on the two ends of the middle main beam, and a plurality of middle cross distribution beams are laid on the main beam, the steel plate beam includes a top plate, a bottom plate and a vertical plate connecting the bottom plate with the top plate, and a middle supporting pad is laid on the middle cross distribution beam; the steel plate beam and the middle supporting pad constitute the bottom formwork of the bridge deck, so that the cast bridge deck is supported on the middle supporting pad and the steel plate beam.

2. A method for supporting a cast-in-place steel-concrete composite beam bridge deck according to claim 1, characterized in that: The middle main beam is an I-beam structure.

3. The method for supporting a cast-in-situ steel-concrete composite beam bridge deck according to claim 1, characterized in that: The middle cross beam is a wooden structure.

4. The method for supporting a cast-in-situ steel-concrete composite beam bridge deck according to claim 1, characterized in that: The middle supporting pad is made of bamboo.

5. The method for supporting a cast-in-situ steel-concrete composite beam bridge deck according to claim 1, characterized in that: The outer side of the steel plate beam at the edge is connected with several inclined support frames distributed along the extension direction of the steel plate beam, and the inclined support frames are provided with several vertical supports that can be raised and lowered, and the vertical supports are distributed along the transverse direction of the bridge, and all the vertical supports of the inclined support frames located on the same straight line along the extension direction of the steel plate beam are supported under the same edge main beam, and the edge main beam is supported under several edge transverse distribution beams, and the edge transverse distribution beams are distributed along the extension direction of the steel plate beam, and edge supporting pads are laid on the edge transverse distribution beams; when in use, the inclination of the edge supporting pads is changed by adjusting the vertical supports to adjust the transverse slope of the bridge deck edge.

6. A method for supporting a cast-in-situ steel-concrete composite beam bridge deck according to claim 5, characterized in that: The oblique support frame includes a transverse support connected together at one end and an oblique support located below the transverse support, and the other end of the transverse support and the other end of the oblique support are connected to the steel plate beam.

7. A method for supporting a cast-in-situ steel-concrete composite beam bridge deck according to claim 6, characterized in that: An upper connecting ear with an upper connecting hole and a lower connecting ear with a lower connecting hole are provided on the outer side of the middle plate of the steel plate beam located at the edge. The upper bolt passes through the cross support and the upper connecting hole and is connected together with the upper nut to connect the cross support and the steel plate beam together. The lower bolt passes through the oblique support and the lower connecting hole and is connected together with the nut to connect the oblique support and the steel plate beam together.

8. A method for supporting cast-in-situ bridge decks of steel-concrete composite beams according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that: The two ends of the middle main beam are supported on the upper ends of the two vertical plastic plates, and the lower ends of the two vertical plastic plates are supported on the bottom plates of the two adjacent steel beams. A casting cavity is formed between the steel beam and the vertical plastic plates, and a casting gap for pouring concrete into the hinge gap is provided between the middle supporting pad and the steel beam. When in use, the concrete is hinged through the hinge gap to the casting cavity, thereby wrapping the surface of the steel beam, thereby preventing the steel beam from rusting after the paint is removed.

9. A method for supporting a cast-in-situ steel-concrete composite beam bridge deck according to claim 8, characterized in that: An outer flange is provided at the upper end of the vertical plastic plate, and the outer flange is extended to the bottom of the middle supporting pad. A concrete entry channel connecting the casting cavity and the casting gap is formed between the outer flange and the top plate. When in use, concrete fills the concrete entry channel and the casting gap, so that the surface of the upper steel plate beam is wrapped to the maximum extent, and the vertical plastic plate can be effectively prevented from separating from the concrete surface layer of the steel plate beam.

10. A method for supporting a cast-in-situ bridge deck of a steel-concrete composite beam according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that: The lifting ring includes two upper connecting ears connected to the top plate and a "U"-shaped supporting fork, lower connecting ears are provided at both ends of the supporting fork, two suspension screws are correspondingly passed through the two upper connecting ears and the lower connecting ears, and the upper ends of the suspension screws are connected with suspension nuts suspended on the upper connecting ears and supporting nuts supported on the lower connecting ears; after the pouring is completed, the supporting nuts are moved downward to make the supporting fork drop, thereby making the middle main beam and the middle cross distribution beam drop, and then the middle main beam, the middle distribution beam and the middle supporting pad are removed.

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