CN212077623U - Detachable prefabricated bridge deck for composite structure bridge - Google Patents
Detachable prefabricated bridge deck for composite structure bridge Download PDFInfo
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- CN212077623U CN212077623U CN202020361418.6U CN202020361418U CN212077623U CN 212077623 U CN212077623 U CN 212077623U CN 202020361418 U CN202020361418 U CN 202020361418U CN 212077623 U CN212077623 U CN 212077623U
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Abstract
The utility model discloses a detachable prefabricated decking for integrated configuration bridge, including concrete main part, two frame steel sheets and two connecting plates, concrete main part locates between two frame steel sheets, and frame steel sheet inboard has set firmly the shear force piece that is used for connecting concrete main part, and two connecting plates locate two the outside of frame steel sheet has set firmly the polylith arm-tie between the frame steel sheet of connecting plate and homonymy, through high strength bolt fixed connection between the connecting plate of two adjacent prefabricated decking. The utility model has the advantages of dependable performance, construction convenience, construction condition strong adaptability, maintainability are dismantled.
Description
Technical Field
The utility model relates to a bridge engineering technical field especially relates to a detachable prefabricated decking for integrated configuration bridge.
Background
The combined beam is a transverse bearing member in which a steel beam and a concrete panel are connected into a whole through a shear connector to bear force together, can fully exert the advantages of high tensile strength of steel and good compression resistance of concrete, and has the advantages of high bearing capacity, high rigidity, good anti-seismic and dynamic performances, small section size of the member, convenience in construction and the like. The existing composite beam adopts the steel beam forms of I shape, box shape, steel truss, honeycomb shape and the like.
The self weight of the concrete girder is large, and under the action of self shrinkage creep and external load, diseases such as cracking and the like are easy to generate during operation. The dead weight of the steel beam is light, but the manufacturing cost is expensive, and the commonly used orthotropic plate steel bridge deck is easy to have the diseases of fatigue cracking of the bridge deck and pavement damage of the bridge deck under the action of wheel load and is difficult to eliminate. The steel-concrete composite beam has the characteristics of both steel tensile strength and concrete compressive strength, avoids the problems of overlarge self weight, overhigh beam height and overhigh foundation cost of the concrete beam, also avoids the problems of overhigh cost of a pure steel structure main beam and easy fatigue failure of a bridge deck, and has excellent technical and economic properties which are very suitable for medium and small span bridges.
However, the conventional steel-concrete composite beam bridge is constructed by welding shear parts on steel girders and then casting concrete in situ or prefabricating bridge decks, but a large amount of wet joints still exist, and the problems of unstable concrete pouring quality, large weather influence, unstable field maintenance quality, prolonged construction period and the like are inevitably caused by the conventional steel-concrete composite beam bridge. In addition, in recent years, with the development of bridge technology, UHPC (Ultra-High Performance Concrete) materials are becoming more and more choices of composite beams to form steel-UHPC composite beam bridges. The UHPC has high tensile strength and compressive strength and good crack resistance, and can be used as a bridge deck slab material to effectively improve the stress performance and durability of the bridge deck slab and greatly reduce the thickness of the bridge deck slab so as to obviously reduce the self weight of the composite beam. But compared with common concrete, the material has higher cost and maintenance requirements, the structural quality is greatly influenced by site construction and weather, the prefabrication and assembly technology of the composite beam bridge deck is immature at the present stage, and the development of the steel-UHPC composite beam bridge is greatly limited.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a detachable prefabricated decking that is used for integrated configuration bridge that reliable performance, construction convenience, construction conditions strong adaptability, maintainable dismantlement.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a detachable prefabricated decking for integrated configuration bridge, includes concrete main part, two frame steel sheets and two connecting plates, concrete main part locates two between the frame steel sheet, frame steel sheet inboard sets firmly the shear force piece that is used for connecting the concrete main part, two the connecting plate branch is located two the outside of frame steel sheet has set firmly the polylith arm-tie between the frame steel sheet of connecting plate and homonymy, through high strength bolt fixed connection between the connecting plate of two adjacent prefabricated decking, and the shear force piece can form the reliable connection between frame steel sheet and the concrete, and the polylith arm-tie can provide the reliable connection between connecting plate and the frame steel sheet that corresponds.
As a further improvement of the above technical solution: the prefabricated bridge deck further comprises a top plate, the top plate is fixedly arranged on the frame steel plate, the connecting plate and the pull plate, and the upper surface of the top plate is flush with the upper surface of the concrete main body. The roof guarantees the level and smooth of prefabricated bridge floor slab top surface on the one hand, and on the other hand has also improved the joint strength of connecting plate and frame steel sheet, and then has also improved the joint strength between the adjacent prefabricated bridge slab.
As a further improvement of the above technical solution: the shear piece is welded with the frame steel plate, the pull plate is welded with the connecting plate and the frame steel plate, and the top plate is welded with the frame steel plate, the connecting plate and the pull plate, so that the construction is convenient and the connection is firm.
As a further improvement of the above technical solution: the concrete main body is a UHPC main body, the UHPC has high tensile strength and compressive strength and good crack resistance, and can be used as a bridge deck plate material to effectively improve the stress performance and durability of the bridge deck plate and greatly reduce the thickness of a bridge deck plate so as to obviously reduce the self weight of the composite beam.
As a further improvement of the above technical solution: the shear pieces and the high-strength bolts are provided with a plurality of rows.
Compared with the prior art, the utility model has the advantages of: the utility model discloses a detachable prefabricated decking for integrated configuration bridge has realized the rapid construction installation between the decking, and the construction only needs hoist and mount and screws up high bridge bolt process, and construction quality is unified, stable, does not have cast-in-place wet seam, does not have field weld; based on the detachable prefabricated bridge deck structure for the composite structure bridge, the utility model provides a construction scheme of full prefabrication, delivery and on-site assembly of bridge decks, which can greatly promote the full prefabrication of concrete bridge decks (especially UHPC) and directly avoid the problem of difficult UHPC on-site pouring and maintenance; the utility model discloses a deck plate structure for integrated configuration bridge can be changed, the harmless dismantlement of rapidization, for the maintenance of operation period is provided very big facility, and when needs circumstances such as circuit change line, can realize dismantling the recovery and recycle, and the life cycle is worth highly, specifically during construction, only need to hoist prefabricated deck plate to preset position, and adjacent prefabricated deck plate fine setting position makes the bolt hole of both align, installs and screws up high strength bolt and can realize connecting; the high-strength bolt can be unscrewed to realize separation during maintenance and replacement.
Drawings
Fig. 1 is a schematic view of the three-dimensional structure of the detachable prefabricated bridge deck for a composite bridge.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is the perspective structure schematic diagram of the prefabricated bridge deck of the present invention after the concrete body is removed.
Fig. 4 is a partially enlarged view of fig. 3.
Fig. 5 is a schematic perspective view of a steel girder according to the present invention.
The reference numerals in the figures denote: 1. a steel main beam; 21. a concrete body; 22. a lower connecting steel plate; 23. a frame steel plate; 24. a shear member; 25. a high-strength bolt; 26. a connecting plate; 27. pulling a plate; 28. a top plate.
Detailed Description
The invention is described in further detail below with reference to the drawings and specific examples.
Fig. 1 to 4 show an embodiment of the present invention, a detachable prefabricated bridge deck for a composite bridge, the present embodiment of the detachable prefabricated bridge deck for a composite bridge, the size of the single prefabricated bridge deck is 15.5m × 3m, the thickness is 140mm, and the whole size of the steel connecting structure on both sides is 15.5m × 104mm × 140 mm. The connecting plate 26 is arranged on the outermost side of the prefabricated bridge deck slab, the size of the connecting plate is 15.5m multiplied by 130mm, the thickness of the connecting plate is 10cm, two rows of high-strength bolt holes which are arranged in a staggered mode are reserved on the connecting plate, the minimum edge distance of the centers of the holes is 35mm, and the center distance of the holes is 130 mm; the size of the frame steel plate 23 is 15.5m multiplied by 130mm, and the side contacting with UHPC is welded
Round head shear nails are used for providing reliable connection between the frame steel plate 23 and the UHPC, the center edge distance of the shear nails is 46mm, the vertical distance is 48mm, and the distance in the length direction of the bridge deck plate is 200 mm; the pull plates 27 are 130mm multiplied by 80mm in size and 20mm in thickness, are welded with the connecting plates 26, the frame steel plates 23 and the top plate 28 on three sides, are 30 on one side of the bridge deck and are arranged in parallel along the length direction of the bridge deck at a distance of 560 mm; the top plate 28 is 15.5m × 104mm in size and 10cm in thickness, and is horizontally arranged on the frame composed of the inner connection plate 26, the frame steel plate 23, and the pulling plate 27.
During construction, after the construction of the steel girder 1 is finished, hoisting the prefabricated bridge deck slab to a preset mounting position, finely adjusting the position of the prefabricated bridge deck slab to align corresponding hole positions of connecting plates of adjacent prefabricated bridge deck slabs, mounting high-strength bolts and screwing bolt caps to a preset fastening force to finish connection; when the prefabricated bridge deck is disassembled, the high-strength bolt cap is screwed down, the high-strength bolt vertically hoisting the prefabricated bridge deck to the lower side of the lower connecting plate leaves the preformed hole in the steel girder 1, and the disassembly is realized.
The construction method of the detachable prefabricated bridge deck for the composite structure bridge of the embodiment specifically comprises the following steps:
1) the connecting plate 26, the frame steel plate 23, the top plate 28 and the pulling plate 27 are respectively processed by a steel processing factory, firstly, a reserved hole is processed on the connecting plate 26 according to the design position, and then, the frame steel plate 23 is welded according to the design position
The round head shear nails are used for finishing the processing of all the plates;
2) welding the processed plates according to the design layout to finish the processing of the steel connecting structure;
3) arranging the two-end steel connecting structure at the design position of a pouring table, erecting a mould, pouring ultra-high performance concrete (UHPC) and performing high-temperature steam curing, and demoulding and storing for not less than 2 months after the design strength is reached;
4) transporting the prefabricated bridge deck to a construction site, hoisting the prefabricated bridge deck to a preset installation position by using a crane, finely adjusting the positions of adjacent bridge decks to align corresponding reserved holes, installing high-strength bolts and screwing high-strength bolt caps to a preset fastening force, namely realizing the connection of the bridge decks; when the high-strength bolt is disassembled, the high-strength bolt is unscrewed, and the disassembly is realized.
Fig. 3 to 4 show an embodiment of the composite structure bridge, the composite structure bridge of this embodiment, steel girder 1 (longeron) adopt the H-shaped section, the height of the girder is 900mm, the width of the upper flange is 300mm, 6 steel girders 1 are arranged in parallel in the bridge width range, and the center distance is 2.8 m. Two rows of preformed holes with the aperture of being
The transverse center distance is 150mm, and the longitudinal center distance is 300 mm.
The prefabricated bridge deck 2 has a thickness of 140mm and dimensions of 15.5m x 3 m. The longitudinal ends of each bridge deck are frame steel plates 23 with the thickness of 14mm, the transverse ends are free of steel plates, the lower parts of the bridge deck are parallelly arranged with 6 lower connecting steel plates 22 with the thickness of 10mm, the width of 300mm and the center distance of 2.8m, and the number and the arrangement of the lower connecting steel plates are consistent with that of the upper flanges of the steel main beams 1. Two rows of lower connecting steel plates 22 are welded
The high-strength bolts 25 have the transverse center distance of 150mm and the longitudinal center distance of 300mm, and are consistent with the arrangement of the preformed holes of the flange plates on the steel girder 1. The lower connecting steel plate 22 and the two end frame steel plates 23 are connected with the UHPC main body in a shear nail mode, and the shear part 24 in the embodiment adopts a shear part
Round head shear pins.
During construction, firstly, the steel girder 1 is hoisted in place, then the prefabricated bridge deck 2 is hoisted to a preset installation position, the high-strength bolts 25 under the prefabricated bridge deck 2 penetrate through corresponding hole positions of the steel girder 1, and the high-strength bolt caps are screwed to a preset fastening force, so that connection is completed; during disassembly, the high-strength bolt cap is screwed off, the prefabricated bridge deck 2 is vertically lifted, and the high-strength bolts 25 leave the reserved holes, so that disassembly is realized.
The construction method of the composite structure bridge of the embodiment specifically comprises the following steps:
1) the method comprises the steps of prefabricating a steel girder 1 with an H-shaped section by a section steel processing and manufacturing factory, and then forming holes at designed positions on the prefabricated H-shaped steel girder 1, thus finishing the processing of the prefabricated steel girder 1.
2) The lower connecting steel plate 22 with the thickness of 2980mm multiplied by 300m multiplied by 16mm and the frame 23 steel plate with the thickness of 15500mm multiplied by 140mm multiplied by 14mm are processed and produced by a steel processing factory, and two rows are welded on one side of the frame steel plate 22
The distance from the center to the edge of the shear nail in the width direction of the plate is 46mm, and the distance in the length direction of the plate is 200 mm; under connecting steel plate22 two rows welded on one side
The distance from the center of the shear nail to the edge in the width direction is 60mm, the distance from the center of the shear nail to the edge in the length direction of the shear nail is 200mm, the finished lower connecting steel plate 22 and the finished frame steel plate 23 are arranged at the designed positions and welded, and the shear nail faces towards the inner side to finish the machining of the steel structure frame of the prefabricated bridge deck 2.
3) The steel structure frame is transported to a UHPC bridge deck prefabrication plant, on the basis of the steel structure frame, templates are built at the two ends of the lower side and the length direction, and the UHPC main body is poured, vibrated and maintained by high-temperature steam in a constant temperature and humidity environment, demoulded and stored for at least 2 months after reaching the design strength.
4) And (4) transporting the prefabricated steel girder 1 segment to a construction site, and hoisting in place.
5) Transporting the prefabricated bridge deck 2 to a construction site, hoisting the prefabricated bridge deck 2 to a preset installation position, enabling the high-strength bolts 25 under the bridge deck to penetrate through corresponding hole positions of the steel main beams 1, and screwing the high-strength bolt caps to a preset fastening force to complete connection; during disassembly, the high-strength bolt cap is screwed off, the bridge deck is vertically lifted, and the high-strength bolt 25 leaves the reserved hole, so that disassembly is realized.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides a detachable prefabricated decking for integrated configuration bridge which characterized in that: including concrete body (21), two frame steel sheet (23) and two connecting plates (26), two are located in concrete body (21) between frame steel sheet (23), frame steel sheet (23) inboard has set firmly shear force spare (24) that are used for connecting concrete body (21), two connecting plate (26) branch is located two the outside of frame steel sheet (23), set firmly polylith arm-tie (27) between connecting plate (26) and the frame steel sheet (23) of homonymy, through high strength bolt (25) fixed connection between connecting plate (26) of two adjacent prefabricated decking.
2. The removable precast bridge deck for a composite structural bridge of claim 1, wherein: the concrete frame is characterized by further comprising a top plate (28), wherein the top plate (28) is fixedly arranged on the frame steel plate (23), the connecting plate (26) and the pulling plate (27), and the upper surface of the top plate (28) is flush with the upper surface of the concrete main body (21).
3. The removable precast bridge deck for a composite structural bridge of claim 2, wherein: the shearing pieces (24) are welded with the frame steel plates (23), the pull plates (27) are welded with the connecting plates (26) and the frame steel plates (23), and the top plates (28) are welded with the frame steel plates (23), the connecting plates (26) and the pull plates (27).
4. The removable prefabricated bridge deck for a composite structural bridge of claim 1, 2 or 3, wherein: the concrete main body (21) is a UHPC main body.
5. The removable prefabricated bridge deck for a composite structural bridge of claim 1, 2 or 3, wherein: the shearing pieces (24) and the high-strength bolts (25) are provided with a plurality of rows.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020361418.6U CN212077623U (en) | 2020-03-20 | 2020-03-20 | Detachable prefabricated bridge deck for composite structure bridge |
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| CN202020361418.6U CN212077623U (en) | 2020-03-20 | 2020-03-20 | Detachable prefabricated bridge deck for composite structure bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502037A (en) * | 2020-12-23 | 2021-03-16 | 河南省交通规划设计研究院股份有限公司 | Wet seam connection structure of prefabricated decking |
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2020
- 2020-03-20 CN CN202020361418.6U patent/CN212077623U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502037A (en) * | 2020-12-23 | 2021-03-16 | 河南省交通规划设计研究院股份有限公司 | Wet seam connection structure of prefabricated decking |
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