CN217974039U - Bridge deck structure - Google Patents
Bridge deck structure Download PDFInfo
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- CN217974039U CN217974039U CN202221772776.1U CN202221772776U CN217974039U CN 217974039 U CN217974039 U CN 217974039U CN 202221772776 U CN202221772776 U CN 202221772776U CN 217974039 U CN217974039 U CN 217974039U
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Abstract
The utility model discloses a decking structure, include: the prefabricated slab comprises an upper layer and a lower layer, wherein the upper layer is a cast-in-place concrete slab, the lower layer comprises a plurality of prefabricated slabs, the prefabricated slabs are plain concrete slabs, edge-covered section steel is arranged on at least two slab edges of the prefabricated slabs along the transverse bridge direction, the thickness of each prefabricated slab is 2-4 cm, and the prefabricated slabs are concrete members with the compressive strength of more than or equal to 150MPa and the bending tensile strength of more than or equal to 20 MPa. The utility model discloses a decking structure is through using the high tenacity concrete that excels in and the shaped steel technique of borduring, realized reducing the thickness of precast slab to 2-4 centimetres, through the reduction of precast slab thickness, the cast in situ concrete plate thickness on upper strata has been increased, cast in situ concrete plate's cross-sectional height has been increased promptly, thereby cast in situ concrete plate's bearing capacity has been improved, and then the structural rigidity and the structural strength of combination formula decking have been improved, make its whole bearing capacity promote, prevent that the decking from ftracturing, the safety of bridge has been guaranteed.
Description
Technical Field
The utility model relates to a decking technical field especially indicates a decking structure.
Background
The major structure of bridge includes pier stud, bent cap, girder, decking, wherein the decking is important atress component, and the decking includes combination formula decking, and combination formula decking comprises the cast-in-place concrete slab on upper strata and the prefabricated bottom plate on lower floor, and wherein, prefabricated bottom plate divides two kinds: the prefabricated steel plate and the prefabricated concrete plate relate to a plurality of professional procedures such as welding processing, mounting, corrosion prevention and the like of a steel structure, so that the construction process of the prefabricated steel plate as the prefabricated bottom plate is complex, the construction period is long, and the steel cost is high; the general traditional precast concrete slab adopts a reinforced concrete slab, the structural thickness meeting the requirements of bearing capacity and rigidity is more than 5 cm, even reaches 10 cm, the structural weight is large, the installation is difficult, the precast main beam with the same thickness and the same height is combined with the precast reinforced concrete slab, the transverse gradient of the design requirement is difficult to form, the transverse slope can only be formed by adjusting the cast-in-place concrete slab, when the transverse slope is large, the thickness of the cast-in-place concrete slab at the splicing part of two adjacent precast reinforced concrete slabs transversely along the bridge is less than 3 cm, and the requirement of the specification on the minimum net protection layer thickness is not met, so that the formed combined bridge deck has poor integrity, low bearing capacity and insufficient durability, and after the combined bridge deck bears the upper load of vehicles and the like, the condition of cracking is easy to occur, and the safety of the bridge structure is further influenced.
Based on the above situation, a bridge deck structure is needed to solve the problems of insufficient bearing capacity and easy cracking of the conventional combined bridge deck.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a bridge deck plate structure to solve traditional combination formula decking bearing capacity and be insufficient, the problem of easy fracture.
In order to achieve the object, the utility model provides a bridge deck structure, include:
the prefabricated slab comprises an upper layer and a lower layer, wherein the upper layer is a cast-in-place concrete slab, the lower layer comprises a plurality of prefabricated slabs, the prefabricated slabs are plain concrete slabs, the thicknesses of the prefabricated slabs are 2-4 cm, edge-covered section steel is arranged at least along two plate edges in the transverse bridge direction, the edge-covered section steel is arranged along the whole length of the plate edges, the edge-covered section steel comprises a lower flange and a web plate, the bottom surface of the lower flange is flush with the bottom surface of the prefabricated slab, the height of the web plate is greater than or equal to the thickness of the prefabricated slab, and the prefabricated slabs are concrete members with the compressive strength greater than or equal to 150MPa and the flexural strength greater than or equal to 20 MPa.
The bridge deck structure comprises an upper layer and a lower layer, wherein the upper layer is a cast-in-place concrete slab, and the lower layer comprises a plurality of precast slabs. The prefabricated slab is prefabricated, the structure is installed on a construction site, extra templates do not need to be installed and disassembled, steel bars do not need to be bound, the construction steps are simplified, and the construction period is shortened; the standardized production of the prefabricated plate is beneficial to the quality control of the prefabricated plate; the precast slab is a plain concrete slab, no steel bar is arranged in the precast slab, so that the thickness of the precast slab can be reduced to 2-4 cm, the precast slab is formed by pouring concrete with the compressive strength of more than or equal to 150MPa and the bending tensile strength of more than or equal to 20MPa, and the sufficient strength and rigidity can be kept when the thickness is reduced to 2-4 cm.
The thickness of the precast slab is reduced, so that the thickness of the cast-in-place concrete slab on the upper layer is increased, namely the height of the section of the cast-in-place concrete slab is increased, the bearing capacity of the cast-in-place concrete slab is improved, the rigidity and the strength of the combined bridge deck are improved, the integral bearing capacity of the combined bridge deck is improved, the bridge deck is prevented from cracking, and the safety of a bridge is ensured.
Preferably, the profiled bar edge is arranged only on two plate edges along the transverse bridge direction.
The prefabricated plate is erected on the main beam, the edge-covered section steel is only arranged on two plate edges along the transverse bridge direction, the bridge is transversely the main stress direction of the prefabricated plate according to the supporting relation between the prefabricated plate and the main beam, the edge-covered section steel is arranged on the plate edge of the main stress direction of the prefabricated plate and is combined with the high-strength and high-toughness prefabricated plate, the steel and concrete can be stressed together by the aid of the construction technology, the bending and pulling strength and rigidity of the prefabricated plate are enhanced, the bending deformation resistance and the breakage resistance of the prefabricated plate under the load action are improved, and the structure safety is guaranteed.
Preferably, two of the prefabricated panels adjacent to each other in the longitudinal direction of the bridge are connected through edge-covered section steel.
Two prefabricated plates which are longitudinally adjacent along the bridge direction are connected together through edge-covered section steel, so that a plurality of prefabricated plates are connected to form a bottom plate of the whole bridge deck, the mounting process is rapid and efficient, and the construction period is shortened.
Preferably, the edge-covered steel sections on two adjacent prefabricated panels are welded or bolted.
The edge-covered section steels on two adjacent prefabricated plates are connected by welding or bolts, so that the plurality of prefabricated plates can be quickly spliced, the construction efficiency is improved, the construction period is shortened, the welding connection is firm and reliable, and the quality of the bridge deck is guaranteed; and the outer edge of the edge-covered section steel is neat, the welding connection is tight, the slurry leakage is avoided, and the casting forming quality of the cast-in-place concrete slab is ensured.
Preferably, a plurality of holes are formed in the edge-covered steel section at intervals in the longitudinal direction.
When the edge-covering section steel is made of channel steel, the upper flange, the lower flange and the web plate of the edge-covering section steel are provided with a plurality of holes at intervals along the longitudinal direction of the edge-covering section steel; when the edge-covered section steel is angle steel, a plurality of holes are formed in the lower flange and the web of the edge-covered section steel at intervals along the longitudinal direction of the edge-covered section steel. The precast slab is made to enter the hole during the pouring and forming process to form the concrete shear tenon, so that the connection performance of the precast slab and the edge-covered section steel is enhanced, the edge-covered section steel and the precast slab can bear better force together, and the bending and pulling bearing capacity of the precast slab is further improved.
Preferably, the aperture of the holes is 5-10 mm.
The aperture of the hole is 5-10 mm, so that the precast slab can form a shear tenon with enough strength when concrete is poured, and the reliable connection of the precast slab and the edge-covered section steel is further ensured.
Preferably, the center-to-center distance between two holes adjacent to each other in the longitudinal direction of the edge-covered section steel is 3-6 cm.
The center distance between two holes which are adjacent along the longitudinal direction of the edge-covered section steel is 3-6 cm, so that the shear resistant tenons on the prefabricated slab have enough distribution density, and the reliable connection of the prefabricated slab and the edge-covered section steel is further ensured.
Preferably, the height of the web plate of the edge-covered steel is the same as the thickness of the precast slab.
The height of the web plate of the edge-covering section steel is the same as the thickness of the precast slab, when the precast slab is precast, the edge-covering section steel is used as a side mold for pouring concrete of the precast slab, the thickness of the edge-covering section steel is the thickness of the precast slab, the production process is facilitated, the thickness of the precast slab is controlled by fixing the thickness of the edge-covering section steel, and the consistency of the appearance of the precast concrete slab is ensured.
Preferably, the edge-covering section steel is a channel steel, and the top surface of the upper flange of the channel steel is flush with the top surface of the precast slab.
The channel-section steel is chooseed for use to bordure shaped steel, and the flange edge of prefabricated plate is hugged closely to the web of channel-section steel, and the top surface of the last flange top surface of channel-section steel and prefabricated plate flushes, and the bottom surface on the bottom flange flushes with the bottom surface of prefabricated plate, and the channel-section steel is complete to be in the same place with the prefabricated plate laminating, better and the prefabricated plate atress work together, and the channel-section steel can promote the bending strength bottom the prefabricated plate.
Preferably, the upper surface of the precast slab is in a napped form.
The prefabricated slab is subjected to napping treatment after concrete pouring is finished, so that the upper surface of the prefabricated slab is rough and can be better and tightly combined with a cast-in-place concrete slab, and the durability of the bridge is improved.
The utility model discloses at least, include following beneficial effect:
the utility model discloses a bridge floor slab structure is through using compressive strength more than or equal to 150MPa, bending tensile strength more than or equal to 20 MPa's high tenacity concrete, cancels the prefabricated plate internal reinforcement to and set up the shaped steel of borduring, realized reducing the thickness of precast concrete plate to 2-4 centimetres. Firstly, the precast slab meets the requirements of bearing capacity and structural rigidity, secondly, the thickness of the precast slab is reduced, the dead weight is reduced, the installation is convenient, the construction difficulty and the labor intensity of workers are reduced, and finally, the thickness of the cast-in-place concrete slab integrally cast at one time on the upper layer is increased, namely, the section height of the cast-in-place concrete slab is increased, the integrity of the cast-in-place concrete slab is improved, and further, the structural rigidity and the structural strength of a combined bridge deck formed by the precast slab and the cast-in-place concrete slab are improved. The strong combined bridge deck can strengthen the connection between the single girders, so that the discrete girders form an integral structure, and the torsion resistance, the bending resistance and the integral stability of the bridge are greatly improved. The edge-wrapped section steel not only improves the bearing capacity of the precast slabs, but also plays a role in connecting the precast slabs, is tightly connected, does not leak slurry, and ensures the molding quality of the cast-in-place concrete slab; holes in the edge-covered section steel are meshed with the shearing force falcons in the prefabricated slab, so that better common stress is achieved, and the upper surface of the prefabricated slab is subjected to galling treatment, so that the prefabricated slab and the cast-in-place concrete slab are combined more closely, and the durability of the bridge is improved.
Drawings
Fig. 1 is a schematic structural diagram of the bridge deck structure of the present invention.
Fig. 2 is a schematic view of the prefabricated panel of the present invention.
Fig. 3 is a partially enlarged view of fig. 2.
Fig. 4 is a data diagram of the bending and pulling load-bearing capacity test of the prefabricated slab of the present invention.
Reference numerals: 1-precast slab, 2-edge-wrapped section steel, 3-hole and 4-cast-in-place concrete slab.
Detailed Description
The technical contents of the present invention are further explained below with reference to the accompanying drawings and embodiments:
example one
As shown in fig. 1, 2 and 3, the bridge deck structure comprises an upper layer and a lower layer, wherein the upper layer is a cast-in-place concrete slab 4, the lower layer comprises a plurality of precast slabs 1, the precast slabs 1 are spliced into a row along the longitudinal bridge direction, and can be transversely spliced into a plurality of rows according to the width requirement of the bridge to form the lower layer of the bridge deck structure, and the splicing seams of the horizontal splicing of the precast slabs 1 are positioned on the top surface of a main beam. The precast slab 1 adopts concrete with compressive strength more than or equal to 150MPa and bending tensile strength more than or equal to 20MPa according to the stress condition of a bridge, namely high-strength concrete, the precast slab 1 has the characteristics of high strength and high toughness, edge-covered section steel 2 is arranged on a transverse bridge-direction slab edge only, the edge-covered section steel 2 is channel steel, the top surface of the upper flange of the channel steel is coplanar with the top surface of the precast slab 1, the bottom surface of the lower flange of the channel steel is coplanar with the bottom surface of the precast slab 1, a web of the channel steel is tightly attached to the side surface of the slab edge of the precast slab 1, the tensile strength of the bottom of the precast slab 1 is enhanced by the lower flange, the vertical rigidity of the precast slab 1 is improved by a web, the compressive strength of the top of the precast slab 1 is enhanced by the upper flange, the edge-covered section steel 2 is combined with the precast slab 1, the common stress of the steel and the concrete can be ensured by the construction technology, the bending tensile strength and the rigidity of the precast slab 1 are enhanced, the bending deformation resistance and the damage resistance of the precast slab 1 can be improved under the effect of reducing the thickness of the traditional precast slab from 5-10 cm to 2 cm, the thickness of the precast slab, and the safety of the cast-in-situ concrete of the precast slab can be improved, and the slab can be improved.
The specification of the edge-covered section steel 2 is as follows: the height of a web plate is 2 cm, the width of an upper flange and a lower flange is 2 cm, the thickness of the upper flange and the lower flange is 2 mm, the web plate and the upper flange and the lower flange of the edge-wrapped section steel 2 are both provided with a plurality of holes 3, the aperture of each hole 3 is 5-10 mm, the preferred range in the scheme is 7 mm, the center distance between every two adjacent holes 3 is 3-6 cm, the preferred range in the scheme is 4 cm, the edge-wrapped section steel 2 can be used as a side mold of a prefabricated plate 1 in the prefabrication process of the prefabricated plate 1, concrete of the prefabricated plate 1 flows into the holes 3 to form shear resistant tenons, and the edge-wrapped section steel 2 and the prefabricated plate 1 are tightly meshed together to better work together; the prefabricated plate 1 is rectangular, the rectangular assembly is simple, the prefabricated plate is not required to be assembled according to other specific rules except for being placed correctly in the longitudinal and transverse directions, the installation efficiency is greatly improved, the construction period is shortened, the prefabricated plate 1 can only produce a bridge deck with one standard specification, multiple development molds are not required, the production efficiency is improved, and the production cost is reduced; the edge-covered section steel 2 is arranged on the plate edge of the precast slab 1 along the transverse direction of the bridge deck, namely the plate edge of the precast slab 1 in the main stress direction, so that the bearing capacity of the precast slab 1 on the assumption of a main beam is improved, and after the precast slab 1 and the cast-in-place concrete slab 4 are bonded together, the precast slab 1 can become a part of the stress of the bridge deck and jointly bear the load of the bridge deck; the adjacent precast slabs 1 are welded and connected through the edge-covered section steel 2, so that the connection reliability of the precast slabs 1 is ensured, the connection tightness of the precast slabs 1 can be kept, slurry cannot leak in the pouring process of the cast-in-place concrete slab 4, and the forming quality of the cast-in-place concrete slab 4 is ensured; in the process of prefabricating the precast slab 1, the upper surface of the precast slab 1 is napped, so that the roughness of the upper surface of the precast slab 1 is increased, the cast-in-place concrete slab 4 and the precast slab 1 are bonded more firmly, and the durability of the bridge deck structure is improved.
The edge-covered steel 2 can also be selected as angle steel, the bottom surface of the lower flange of the angle steel is coplanar with the bottom surface of the prefabricated plate 1, the web plate of the angle steel is tightly attached to the side surface of the edge of the prefabricated plate 1, the tensile strength of the bottom of the prefabricated plate 1 is enhanced by the lower flange, the vertical rigidity of the prefabricated plate 1 is improved by the web plate, and the angle steel is also provided with a hole 3 for forming a shear tenon on the prefabricated plate 1 and enhancing the connection between the prefabricated plate 1 and the angle steel.
The prefabricated plate 1 that vertically is adjacent along the bridge is connected through bordure shaped steel 2, and bordure shaped steel 2 leads to and adopts bolted connection, is provided with the engaging lug on the bordure shaped steel 2, and the bolt passes the engaging lug and couples together adjacent bordure shaped steel 2, does not relate to the special worker kind of welded, and the construction degree of difficulty reduces, and the connection speed is fast, has shortened the time limit for a project to bolted connection's intensity is big, and is reliable and stable, has improved engineering quality.
The holes 3 may also be provided only at intervals in the longitudinal direction of the profiled bar 2 on the web of the profiled bar 2. In the process of pouring and forming the precast slab 1, concrete enters the hole 3 to form the concrete shear tenon, so that the connection performance of the precast slab 1 and the edge-covering section steel 2 is enhanced, the edge-covering section steel 2 and the precast slab 1 can be better stressed together, and the durability of the precast concrete slab is improved.
The holes 3 can also be arranged on the flange of the edge-binding section steel 2 at intervals along the longitudinal direction of the edge-binding section steel 2. In the process of pouring and forming the precast slab 1, concrete enters the hole 3 to form the concrete shear tenon, so that the connection performance of the precast slab 1 and the edge-covering section steel 2 is enhanced, the edge-covering section steel 2 and the precast slab 1 can be better stressed together, and the durability of the precast concrete slab is improved.
The edge-covered section steel 2 can also be arranged on four sides of the precast slab 1, so that the strength and rigidity of the precast slab 1 are greatly increased, and the strength and rigidity of the bridge deck are further increased.
The edge-covered steel sections 2 can also be arranged on two plate edges of the prefabricated plate 1 along the transverse bridge and one plate edge of the prefabricated plate 1 along the longitudinal bridge, so that the strength and the rigidity of the prefabricated plate 1 are greatly increased, and the strength and the rigidity of the bridge deck are further increased.
The bending and pulling bearing capacity test data of the prefabricated slab is shown in figure 4: the experimental subjects of this experiment were: preformed sheet 1 of specification 100 cm by 50 cm by 2 cm, tested for the purposes: the prefabricated slab 1 is respectively compared with bending and pulling bearing capacities under the conditions that the edge-covered section steel 2 is arranged and the edge-covered section steel 2 is not arranged, (the specification of the edge-covered section steel 2 is that a web is 2 cm in height, the width of an upper flange and the width of a lower flange are 2 cm, the thickness of the upper flange and the lower flange are 2 mm, holes 3 are formed in the web and the upper flange and the lower flange of the edge-covered section steel 2, the aperture of each hole 3 is 7 mm, the central distance between every two holes 3 which are adjacent in the longitudinal direction of the edge-covered section steel 2 is 4 cm, and the arrangement mode of the edge-covered section steel 2 is shown in figure 2). The test results are as follows: the bending-pulling limit bearing capacity of the precast slab 1 provided with the edge-covered section steel 2 is 8.3kN, the bending-pulling limit bearing capacity of the precast slab 1 without the edge-covered section steel 2 is 3.5kN, the former is 2.4 times of the latter, and the bending-pulling limit bearing capacity of the precast slab 1 is proved to be greatly improved by the edge-covered section steel 2.
It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by those skilled in the art within the scope of the appended claims without departing from the essential spirit of the invention.
Claims (10)
1. A deck slab structure comprising: upper strata and lower floor, its characterized in that: the prefabricated slab structure is characterized in that the upper layer is a cast-in-place concrete slab (4), the lower layer comprises a plurality of prefabricated slabs (1), the prefabricated slabs (1) are plain concrete slabs, the thickness of the prefabricated slabs (1) is 2-4 cm, at least two slab edges of the prefabricated slabs (1) in the transverse bridge direction are provided with edge-wrapped section steel (2), the edge-wrapped section steel (2) is arranged along the length corresponding to the slab edges, the edge-wrapped section steel (2) comprises a lower flange and a web plate, the bottom surface of the lower flange is flush with the bottom surface of the prefabricated slabs, the height of the web plate is larger than or equal to the thickness of the prefabricated slabs (1), and the prefabricated slabs (1) are concrete members with the compressive strength larger than or equal to 150MPa and the bending tensile strength larger than or equal to 20 MPa.
2. Bridge deck structure according to claim 1, characterized in that said profiled edge cladding bars (2) are arranged only at two plate edges in the transverse direction.
3. Bridge deck structure according to claim 2, characterized in that two of said precast slabs (1) adjacent in the longitudinal direction of the bridge are connected by a profiled bar (2) with a border.
4. Bridge deck structure according to claim 3, characterized in that said profiled edge sections (2) of two adjacent precast slabs (1) are welded or bolted.
5. Bridge deck structure according to claim 1, characterized in that a number of holes (3) are provided in the profiled edge section (2) at longitudinal intervals.
6. Bridge deck structure according to claim 5, characterized in that said holes (3) have a diameter of 5-10 mm.
7. Bridge deck structure according to claim 6, characterized in that the centre-to-centre spacing of two said holes (3) adjacent in the longitudinal direction of said profiled section (2) is 3-6 cm.
8. Bridge deck structure according to claim 1, characterized in that the web height of said profiled edge sections (2) is the same as the thickness of said precast slabs (1).
9. The deck panel structure according to claim 8, characterised in that the channel section steel (2) is a channel steel, and the top surface of the upper flange of the channel steel is flush with the top surface of the precast slab (1).
10. Bridge deck structure according to any of claims 1-9, characterized in that the upper surface of said precast slab (1) is of napped form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221772776.1U CN217974039U (en) | 2022-07-11 | 2022-07-11 | Bridge deck structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221772776.1U CN217974039U (en) | 2022-07-11 | 2022-07-11 | Bridge deck structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217974039U true CN217974039U (en) | 2022-12-06 |
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ID=84277275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221772776.1U Active CN217974039U (en) | 2022-07-11 | 2022-07-11 | Bridge deck structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217974039U (en) |
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2022
- 2022-07-11 CN CN202221772776.1U patent/CN217974039U/en active Active
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