CN216712734U - Connecting structure of prefabricated bridge deck of steel-concrete composite beam - Google Patents
Connecting structure of prefabricated bridge deck of steel-concrete composite beam Download PDFInfo
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- CN216712734U CN216712734U CN202220254745.0U CN202220254745U CN216712734U CN 216712734 U CN216712734 U CN 216712734U CN 202220254745 U CN202220254745 U CN 202220254745U CN 216712734 U CN216712734 U CN 216712734U
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Abstract
The utility model discloses a connecting structure of a prefabricated bridge deck of a steel-concrete composite beam, which comprises a first steel plate, wherein the length of the first steel plate is matched with that of the prefabricated bridge deck, the first steel plate is pre-embedded in the bottom surface of the prefabricated bridge deck through a plurality of shear nails arranged at intervals, the shear nails are distributed along the entire length of the first steel plate, and the prefabricated bridge deck is connected with a steel main beam through a clamping groove structure in a welding mode. The arrangement range of the shear nails is effectively enlarged by the structure, the arrangement range can be equal to that of a conventional cast-in-place concrete deck slab, the stress concentration of a cluster shear key of a conventional precast concrete slab is avoided, the construction quality is effectively improved, the precast deck slab is connected with a steel girder through the clamping groove structure in a welding mode, the precast deck slab and the steel girder are enabled to be free of hole opening, the stress of the precast deck slab and the steel girder can not be weakened, the reliability of the structure quality is guaranteed, the adaptability is effectively improved, the construction process is reduced, and the influence of a connecting bolt on the arrangement of the shear nails is avoided.
Description
Technical Field
The utility model relates to the technical field of prefabricated bridge deck structures, in particular to a connecting structure of a prefabricated bridge deck of a steel-concrete composite beam.
Background
In the construction of the existing steel-concrete composite beam adopting the prefabricated bridge deck, the conventional scheme is to prefabricate the concrete bridge deck in blocks, the bridge deck is provided with reserved notches at corresponding positions of the bunched shear nails on the steel main beam, and concrete is poured and sealed after the concrete slab is installed, so that the aim of connecting the concrete slab and the steel main beam is fulfilled. According to the scheme, the cluster shear nails can be arranged at the reserved groove openings of the bridge deck, and the problems that the arrangement number of the shear nails is limited, the stress at the shear nails is concentrated, the arrangement of reinforcing steel bars of the bridge deck is influenced, the concrete at the opening positions needs to be poured on site and the like exist. The scheme in addition is pre-buried in the concrete with the shear force nail when prefabricating the decking, reserve the bolt hole in the concrete bottom, treat that the concrete decking erects the back and be connected steel girder top flange and concrete decking through the bolt, nevertheless the bolt hole needs to be reserved in this scheme concrete slab, bolt hole off normal easily appears when concreting, the low later stage connection quality that leads to of pre-buried bolt hole quality is unreliable, the trompil weakens the scheduling problem to concrete slab, also need the trompil in the corresponding position of bolt hole at the top flange of steel girder simultaneously, there is certain cross-section to weaken the problem also to the steel girder, and the construction is comparatively complicated. Therefore, the scheme of fully precast concrete bridge deck slab needs to be considered, the construction quality is improved, and the structural stress can be effectively improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the prior art has limited shear nail arrangement quantity, concentrated stress, large field construction workload, difficult control of construction quality and the like caused by pouring of reserved hole concrete; the scheme of reserving the bolt holes in the prefabricated bridge deck slab has the defects that the connection quality is unreliable, the bolt holes are prone to deviation when the prefabricated bridge deck slab is poured, the bolt holes are prone to loosening and falling under the vibration effect of a train to cause potential safety hazards, holes weaken the structure and the like, and the connecting structure of the prefabricated bridge deck slab of the steel-concrete composite beam is provided.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a connection structure of prefabricated decking of steel-concrete composite beam, contains first steel sheet, the length of the prefabricated decking of length adaptation of first steel sheet, first steel sheet through the shear force nail that a plurality of intervals set up pre-buried in prefabricated decking bottom surface, the shear force nail is followed first steel sheet leads to long the distribution, prefabricated decking passes through draw-in groove structure welded connection steel girder.
Parameters such as the buried depth, the spacing and the number of the shear nails are determined according to actual needs.
By adopting the connecting structure of the prefabricated bridge deck of the steel-concrete composite beam, the arrangement range is effectively expanded by arranging the shear nails on the first steel plate embedded in the prefabricated bridge deck, the arrangement can be equal to the arrangement of the conventional cast-in-place concrete bridge deck, the stress concentration at the shear key is avoided, the construction of on-site concrete is reduced, and the construction quality is effectively improved.
Preferably, the bottom surfaces of the two sides of the first steel plate are provided with the clamping groove structures, the width of each clamping groove structure is matched with the thickness of the upper flange of the steel girder, and the clamping groove structures are welded with the upper flanges.
Further preferably, the slot structure and the bottom surface of the upper flange are provided with fillet welds.
Preferably, first steel sheet both sides all have the draw-in groove structure, the notch of draw-in groove structure sets up down, the last flange both sides top surface of steel girder all has the connection nail, the shape and size adaptation of draw-in groove structure the shape and size of connection nail, draw-in groove structure and last flange welding, the draw-in groove structure has the fillet weld with the connection nail side.
Preferably, still contain bury in advance the second steel sheet of cell type structure in the prefabricated decking, the second steel sheet is located first steel sheet both sides, the second steel sheet welds with first steel sheet, the lower plate of second steel sheet with first steel sheet forms the draw-in groove structure, the width adaptation of draw-in groove structure the thickness on the last flange of steel girder, the draw-in groove structure welds with last flange.
Further preferably, the lower side plate of the second steel plate and the bottom surface of the upper flange have fillet welds.
The draw-in groove structure can adopt above-mentioned mode to set up, the draw-in groove structure welds with the back of taking one's place of last flange installation, realizes the reliable connection of steel girder and concrete decking, need not to decking or steel girder trompil, has effectively improved the wholeness of structure, avoids adopting bolted connection simultaneously, has avoidd safety risks such as the later stage operation in-process probably appears dropping.
Further preferably, the transverse steel bars of the prefabricated bridge deck are disconnected at the second steel plate and welded with the second steel plate; or
And the second steel plate is provided with a hole at the transverse steel bar.
Further preferably, the burial depth of the second steel plate in the prefabricated bridge deck is greater than or equal to the height of the shear nails.
Preferably, the thickness of the first steel plate is the same as that of the upper flange of the steel main beam.
Preferably, the width of the prefabricated bridge deck slab is the width of a bridge deck, two longitudinally adjacent prefabricated bridge deck slabs are connected through wet joints, and a plurality of shear keys are correspondingly arranged in the wet joints.
Further preferably, the shear key is welded to the top surface of the steel girder.
Preferably, the two longitudinally adjacent first steel plates extend into the wet joint to be welded, and the shear keys are welded to the top surfaces of the corresponding first steel plates respectively.
The construction of on-site concrete is reduced, and the stress reliability of the wet joint is ensured.
In summary, compared with the prior art, the utility model has the beneficial effects that:
by adopting the connecting structure of the prefabricated bridge deck of the steel-concrete composite beam, the arrangement range of the shear nails is effectively expanded, the connecting structure can be equal to the arrangement of the conventional cast-in-place concrete bridge deck, the stress concentration at the shear key is avoided, the construction quality is effectively improved, the prefabricated bridge deck is connected with the steel main beam through the clamping groove structure in a welding manner, holes are not needed for the prefabricated bridge deck and the steel main beam, the stress of the prefabricated bridge deck and the steel main beam cannot be weakened, the reliability of the structure quality is favorably ensured, the adaptability is effectively improved, the construction process is reduced, and the influence of connecting bolts on the arrangement of the shear nails is avoided.
Description of the drawings:
fig. 1 is a schematic structural view illustrating a connection structure of a prefabricated bridge deck of a steel-concrete composite girder according to example 1;
fig. 2 is a schematic structural view of a connection structure of a precast bridge deck of a steel-concrete composite girder according to example 2.
Fig. 3 is a schematic structural view illustrating a connection structure of a prefabricated bridge deck of a steel-concrete composite girder according to embodiment 3.
The labels in the figure are: 1-a first steel plate, 2-a prefabricated bridge deck, 3-shear nails, 4-a steel main beam, 5-connecting nails and 6-a second steel plate.
Detailed Description
The utility model is described in further detail below with reference to the figures and the embodiments. It should be understood that the scope of the above-described subject matter of the present invention is not limited to the following examples, and any technique realized based on the contents of the present invention is within the scope of the present invention.
Example 1
As shown in fig. 1, the connection structure of the prefabricated bridge deck of the steel-concrete composite beam comprises a first steel plate 1, wherein the length of the first steel plate 1 is matched with the length of a prefabricated bridge deck 2, common steel bars at corresponding positions in the prefabricated bridge deck 2 are welded on the first steel plate 1, the first steel plate 1 is pre-embedded on the bottom surface of the prefabricated bridge deck 2 through a plurality of shear nails 3 arranged at intervals, the bottom surface of the first steel plate 1 is flush with the bottom surface of the prefabricated bridge deck 2, the shear nails 3 are distributed along the length of the first steel plate 1, and parameters such as the embedding depth, the interval, the number and the like of the shear nails 3 are determined according to actual needs. Prefabricated decking 2 passes through draw-in groove structure welded connection steel girder 4, and is concrete, the thickness of first steel sheet 1 with the thickness on the top flange of steel girder 4 is the same, the both sides bottom surface of first steel sheet 1 all has the draw-in groove structure, the width adaptation of draw-in groove structure the thickness on the top flange of steel girder 4, about 3mm is big than the thickness on the top flange like the width, two the draw-in groove structure is horizontal about rich 2mm after the installation on the top flange, draw-in groove structure and top flange welding, the draw-in groove structure has the fillet weld with top flange bottom surface, the draw-in groove structure does not restrict the length setting. Adopt the mode of draw-in groove and cooperation welding, strengthened being connected of prefabricated decking 2 and steel girder 4, avoided facility bolt to connect in concrete slab, the draw-in groove structure can be with first steel sheet 1 structure as an organic whole, also can adopt welding such as angle steel, channel-section steel to form. The first steel plate 1 has the function of a shear key, so that the connection between concrete and a steel main beam 4 is enhanced, or part of the shear nails 3 can be saved.
In general, a steel-concrete composite girder bridge has at least two main steel girders 4, and fig. 1 shows only one of the main steel girders 4, and the other one is arranged in the same manner as in fig. 1. Preferably, the width of prefabricated decking 2 is the bridge floor width, vertically adjacent two connect through wet joint between the prefabricated decking 2, just only prefabricate in segmentation on vertical promptly, do benefit to the construction that reduces on-the-spot concrete, correspond in the wet joint and be equipped with a plurality of shear force keys, effectively guarantee that the atress of wet joint department is reliable, the shear force key can weld in 4 top surfaces of steel girder, also can be with corresponding two first steel sheet 1 respectively stretches into half in the wet joint welded connection in the wet joint, the shear force key is located 1 top surfaces of first steel sheet.
Example 2
The structure of the connection structure of the prefabricated bridge deck slab of the steel-concrete composite beam is substantially the same as that of the connection structure of the embodiment 1, and the difference is that the two sides of the first steel plate 1 are respectively provided with the clamping groove structure with the downward notch, the top surfaces of the two sides of the upper flange of the steel main beam 4 are respectively provided with a plurality of connecting nails 5 which are distributed at intervals, the shape and the size of the clamping groove structure are matched with the shape and the size of the connecting nails 5, and the clamping groove structure is welded with the upper flange, as shown in fig. 2. The clamping groove structures on two sides are connected with the first steel plate 1 in a welding mode, fillet welds are arranged on the side faces of the clamping groove structures and the side faces of the connecting nails 5, and the clamping groove structures and the first steel plate 1 are pre-buried in the prefabricated bridge deck slab 2 during prefabrication.
Example 3
The structure of the connecting structure of the prefabricated bridge deck of the steel-concrete composite beam is substantially the same as that of the connecting structure of the prefabricated bridge deck of the embodiment 1, and the difference is that as shown in fig. 3, the connecting structure further comprises a second steel plate 6 with a groove-shaped structure, the second steel plate 6 is embedded in the prefabricated bridge deck 2, the embedding depth of the second steel plate 6 in the prefabricated bridge deck 2 is greater than or equal to the height of the shear nails 3, and the top surface of the second steel plate 6 is provided with a protective layer in a reserved thickness. Second steel sheet 6 is located respectively 1 both sides of first steel sheet, suitable symmetrical arrangement, second steel sheet 6 and 1 butt weld of first steel sheet, the lower curb plate of second steel sheet 6 with 1 formation of first steel sheet the draw-in groove structure, the width adaptation of draw-in groove structure the thickness on the top flange of steel girder 4, the draw-in groove structure welds with the top flange, the lower curb plate of second steel sheet 6 has the fillet weld with the top flange bottom surface. The second steel plate 6 is not limited to the full length arrangement.
In order to facilitate the arrangement of the transverse bridge-direction reinforcing steel bars in the prefabricated bridge deck 2, the second steel plate 6 can be provided with holes at corresponding positions where the transverse reinforcing steel bars are arranged so as to facilitate the penetration of the reinforcing steel bars; the transverse reinforcement can also be broken at the second steel plate 6 and welded to the second steel plate 6.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a connection structure of prefabricated decking of steel-concrete composite beam, its characterized in that contains first steel sheet (1), the length of the prefabricated decking (2) of length adaptation of first steel sheet (1), first steel sheet (1) through shear force nail (3) of a plurality of intervals setting pre-buried in prefabricated decking (2) bottom surface, shear force nail (3) are followed first steel sheet (1) lead to long the distribution, prefabricated decking (2) are through draw-in groove structure welded connection steel girder (4).
2. The connecting structure of the precast bridge deck slab made of the steel and concrete composite girders according to claim 1, wherein the bottom surfaces of both sides of the first steel plate (1) are provided with the groove structures, the width of the groove structures is adapted to the thickness of the upper flange of the main steel girder (4), the groove structures are welded with the upper flange, and the groove structures are provided with fillet welds with the bottom surfaces of the upper flange.
3. The connecting structure of the precast bridge deck slab made of the steel and concrete composite girders according to claim 1, wherein the clamping groove structures are arranged on both sides of the first steel plate (1), the notches of the clamping groove structures are arranged downward, the connecting nails (5) are arranged on both top surfaces of the upper flange of the main steel girder (4), the shape and the size of the clamping groove structures are matched with those of the connecting nails (5), the clamping groove structures are welded with the upper flange, and the side surfaces of the clamping groove structures and the connecting nails (5) are provided with fillet welds.
4. The connecting structure of the precast bridge deck slab of the steel-concrete composite beam according to claim 1, further comprising a second steel plate (6) of a groove structure pre-buried in the precast bridge deck slab (2), wherein the second steel plate (6) is located at two sides of the first steel plate (1), the second steel plate (6) is welded to the first steel plate (1), a lower side plate of the second steel plate (6) and the first steel plate (1) form the slot structure, the width of the slot structure is matched with the thickness of an upper flange of the steel girder (4), the slot structure is welded to the upper flange, and a fillet weld is formed between the lower side plate of the second steel plate (6) and the bottom surface of the upper flange.
5. The connecting structure of the precast bridge deck of the steel-concrete composite girder according to claim 4, wherein the transverse steel bars of the precast bridge deck (2) are broken at the second steel plate (6) and welded with the second steel plate (6); or
The second steel plate (6) is provided with holes at the transverse steel bars.
6. The connecting structure of the precast bridge deck according to the steel-concrete composite beam of claim 4, wherein the burial depth of the second steel plate (6) in the precast bridge deck (2) is greater than or equal to the height of the shear pins (3).
7. The connecting structure of the precast bridge deck according to the steel-concrete composite girder according to any one of claims 1 to 6, wherein the thickness of the first steel plate (1) is the same as that of the upper flange of the main steel beam (4).
8. The connecting structure of the precast bridge deck of the steel-concrete composite beam as claimed in claim 7, wherein the width of the precast bridge deck (2) is the width of a bridge deck, two longitudinally adjacent precast bridge decks (2) are connected by wet joints, and a plurality of shear keys are correspondingly arranged in the wet joints.
9. The connecting structure of the precast bridge deck of the steel-concrete composite beam according to claim 8, wherein the shear key is welded to the top surface of the steel main beam (4).
10. The connecting structure of the precast bridge deck slab made of the steel and concrete composite girders according to claim 8, wherein two longitudinally adjacent first steel plates (1) are welded together by extending into the wet joint, and the shear keys are welded to the top surfaces of the corresponding first steel plates (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220254745.0U CN216712734U (en) | 2022-02-07 | 2022-02-07 | Connecting structure of prefabricated bridge deck of steel-concrete composite beam |
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| CN202220254745.0U CN216712734U (en) | 2022-02-07 | 2022-02-07 | Connecting structure of prefabricated bridge deck of steel-concrete composite beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125835A (en) * | 2022-06-22 | 2022-09-30 | 保利长大工程有限公司 | Prefabricated bridge deck structure of steel plate combination beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115125835A (en) * | 2022-06-22 | 2022-09-30 | 保利长大工程有限公司 | Prefabricated bridge deck structure of steel plate combination beam |
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