CN211645941U - Precast concrete beam and concrete slab combination beam with built-in steel plate - Google Patents
Precast concrete beam and concrete slab combination beam with built-in steel plate Download PDFInfo
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- CN211645941U CN211645941U CN201921998949.XU CN201921998949U CN211645941U CN 211645941 U CN211645941 U CN 211645941U CN 201921998949 U CN201921998949 U CN 201921998949U CN 211645941 U CN211645941 U CN 211645941U
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Abstract
A precast concrete beam and concrete slab combination beam with a built-in steel plate comprises a precast concrete beam and a precast concrete slab, wherein the precast concrete beam comprises a precast concrete U beam and an I beam, and a vertical steel plate/corrugated steel plate is fixedly arranged in a web plate; if the U-shaped beam is adopted, a short/long transverse steel plate is fixedly arranged in the upper/lower flange; if the beam is an I beam, a short transverse steel plate is fixedly arranged in the lower flange; the surface of each steel plate is welded with a shear connector. The construction method comprises the following steps: preparing vertical steel plates/corrugated steel plates and short/long transverse steel plates, welding the shear connectors to the surfaces of the steel plates, and then welding the steel plates into a combined body; manufacturing a precast concrete slab; manufacturing a precast concrete beam, firstly erecting a template, then binding a reinforcement cage, placing and fixing a steel plate assembly in the reinforcement cage, and arranging a corrugated pipe and prestressed ribs; pouring concrete until the concrete is solidified and formed, tensioning the prestressed reinforcing steel and fixing the prestressed reinforcing steel by using an anchorage device; and combining the concrete beam and the concrete slab, putting the shear nails into the pre-buried holes, pouring high-strength mortar until the high-strength mortar is solidified, and finishing construction.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, especially, relate to a precast concrete roof beam and concrete slab combination beam of built-in steel sheet.
Background
The precast concrete U-beam is a common concrete beam, and is applied to bridges in many ways, the span of the precast concrete U-beam can reach 40m, and the height of the precast concrete U-beam is generally 0.6-2.6 m. The precast concrete U-shaped beam can be divided into a narrow series U-shaped beam, a medium series U-shaped beam and a wide series U-shaped beam according to different widths of the lower flange. The precast concrete U roof beam has a lot of advantages, compares with precast concrete I roof beam, and under the same span, the height of precast concrete U roof beam is littleer, need not set up the bent cap on the pier stud moreover to preparation roof beam, transportation, equipment roof beam are small in quantity. However, the precast concrete U-beam has the disadvantages of relatively obvious self weight, higher transportation capacity, relatively complex design and calculation, and complex template manufacturing. At present, a precast concrete U beam and a precast concrete slab are combined to form a composite beam, the precast concrete U beam and the precast concrete slab above the precast concrete U beam are connected through a shear member, and the joint is encapsulated by using building glue or high-strength mortar, so that the composite beam forms a whole.
The precast concrete I beam is a common concrete beam, the span of the precast concrete I beam is 20-45 m, the height of the precast concrete I beam is generally 0.9-2.3 m, and the span-height ratio can reach 15-20. The disadvantages of the precast concrete I beam are obvious, the transverse bending rigidity of the precast concrete I beam is low, the stability of the precast concrete I beam in the prefabrication, transportation and hoisting stages is poor, and the connection integrity of the bridge deck is poor due to the fact that the area of the concrete with the compressed upper edge is small. At present, a precast concrete I beam and a precast concrete slab are combined to form a composite beam, the precast concrete I beam and the precast concrete slab above the precast concrete I beam are connected through a shear member, and the joint is encapsulated by using building glue or high-strength mortar, so that the composite beam forms a whole.
However, in both the concrete U-beam and the concrete I-beam, when they are combined with the precast concrete slab as a whole to bear force, the bending moment is mainly borne by the beam and the concrete slab, and the shearing force is mainly borne by the web of the beam. To ensure that the composite beam has sufficient shear resistance, this can only be achieved by increasing the thickness of the web, in addition to providing sufficient stirrups. And the increase of web thickness inevitably leads to the whole weight increase of combination beam, and then has increaseed the degree of difficulty of prefabricated component hoist and mount and transportation in the bridge work progress.
SUMMERY OF THE UTILITY MODEL
The problem to prior art exists, the utility model provides a precast concrete roof beam and concrete slab combination beam of built-in steel sheet can effectively improve its ability of shearing under the prerequisite that does not increase the roof beam body dead weight.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a precast concrete beam and concrete slab combination beam with a built-in steel plate comprises a precast concrete beam and a precast concrete slab, wherein the precast concrete slab is fixedly arranged at the top end of a web plate of the precast concrete beam; the precast concrete beam comprises two structural forms, namely a precast concrete U beam and a precast concrete I beam; when the structural form of the precast concrete U beam is adopted, a vertical steel plate is fixedly arranged inside a web plate of the precast concrete U beam, a short transverse steel plate is fixedly arranged inside an upper flange of the precast concrete U beam, and the short transverse steel plate is fixedly connected with the top of the vertical steel plate in a welding manner; the lower flange of the precast concrete U beam is fixedly provided with a long transverse steel plate or is not provided with the long transverse steel plate, when the lower flange of the precast concrete U beam is fixedly provided with the long transverse steel plate, the long transverse steel plate is fixedly connected with the bottom of the vertical steel plate in a welding way, and a plurality of shear connectors are uniformly welded on the surfaces of the two sides of the long transverse steel plate and the vertical steel plate; when the structural form of the precast concrete I beam is adopted, a vertical steel plate is fixedly arranged inside a web plate of the precast concrete I beam, a short transverse steel plate is fixedly arranged in a lower flange of the precast concrete I beam and fixedly connected with the vertical steel plate in a welding mode, a plurality of shear connectors are uniformly welded on the surfaces of two sides of the vertical steel plate, and a plurality of shear connectors are uniformly welded on the lower surface of the short transverse steel plate.
When the precast concrete U beam is a prestressed precast concrete U beam, a prestressed rib is arranged inside the lower flange of the precast concrete U beam, and a corrugated pipe is arranged outside the prestressed rib in advance.
When the precast concrete I beam is a prestressed precast concrete I beam, a prestressed rib is arranged inside the lower flange of the precast concrete I beam, and a corrugated pipe is arranged outside the prestressed rib in advance.
The vertical steel plate can be replaced by a corrugated steel plate.
The shear connector adopts studs or steel plates with holes.
The construction method of the precast concrete beam with the built-in steel plate and the concrete slab combination beam comprises the following steps:
the method comprises the following steps: preparing short transverse steel plates, vertical steel plates or corrugated steel plates with designed sizes according to the design height of the web plate, when the structural form of the precast concrete U beam is adopted, if long transverse steel plates need to be arranged, long transverse steel plates with designed sizes need to be prepared, and if long transverse steel plates are not needed, long transverse steel plates do not need to be prepared; meanwhile, a reserved hole for the stirrup to pass through needs to be machined at a specified position on the short transverse steel plate, the vertical steel plate or the corrugated steel plate; if a long transverse steel plate is prepared, a reserved hole for passing the stirrup needs to be processed at a specified position on the long transverse steel plate;
step two: firstly welding the studs or the steel plates with holes to the surfaces of the short transverse steel plates, the vertical steel plates or the corrugated steel plates, and then welding the short transverse steel plates and the vertical steel plates or the corrugated steel plates together to form a steel plate assembly; if the structural form of the precast concrete U beam is adopted and the long transverse steel plate is prepared, the long transverse steel plate and the vertical steel plate or the corrugated steel plate are required to be welded together, and the shear nails are welded on the upper surface of the short transverse steel plate;
step three: manufacturing a precast concrete slab; firstly, supporting a template, then binding a reinforcement cage, arranging a pre-embedded mold to form a shear nail pre-embedded hole, and finally pouring concrete into the template until the concrete is cured and formed, and finishing the manufacturing of the precast concrete plate;
step four: manufacturing a precast concrete beam; firstly, supporting a template, then binding a reinforcement cage, placing the welded steel plate assembly into the reinforcement cage, and fixing the assembly; when the prestressed precast concrete U beam/I beam is adopted, a corrugated pipe and prestressed ribs are required to be arranged inside the lower flange of the precast concrete U beam/I beam;
step five: pouring concrete into the template until the concrete is cured and formed, tensioning the prestressed tendons, fixing the prestressed tendons by using an anchorage device, and finishing the manufacturing of the precast concrete beam;
step six: and hoisting the prepared precast concrete slab to the top of the precast concrete beam on the basis of the prepared precast concrete beam, enabling the shear nails at the top of the precast concrete beam to accurately enter the shear nail embedded holes of the precast concrete slab, pouring building glue or high-strength mortar into the shear nail embedded holes until the shear nails are packaged and fixed, and at the moment, fixedly connecting the precast concrete slab and the precast concrete beam into a whole, thus finishing construction.
The utility model has the advantages that:
the utility model discloses a precast concrete roof beam and concrete slab combination beam of built-in steel sheet can effectively improve its ability of shearing under the prerequisite that does not increase the roof beam body dead weight.
Drawings
Fig. 1 is a schematic cross-sectional view of a precast concrete beam with a built-in steel plate and a concrete slab composite beam (a precast concrete U beam and a long transverse steel plate not arranged in a lower flange) according to the present invention;
fig. 2 is a schematic cross-sectional view of a precast concrete U beam (a long transverse steel plate is arranged in a lower flange) of the present invention;
fig. 3 is a schematic cross-sectional view of a precast concrete beam and a concrete slab composite beam (precast concrete I beam) with a built-in steel plate according to the present invention;
fig. 4 is a top view of the vertical steel plate and short transverse steel plate welding assembly (suitable for U-beam + shear connector is stud);
fig. 5 is a front view of the vertical steel plate and short transverse steel plate welding assembly (suitable for the U-beam and the shear connector is a stud);
fig. 6 is a left side view of the vertical steel plate and short transverse steel plate welding assembly (suitable for U-beam + shear connector is stud);
fig. 7 is a bottom view of the vertical steel plate and short transverse steel plate welding assembly (suitable for the U-beam and the shear connector is a stud);
FIG. 8 is a front view of the welded assembly of corrugated steel plate and short transverse steel plate (suitable for U-beam) of the present invention;
fig. 9 is a left side view of the corrugated steel plate and short transverse steel plate welding assembly (suitable for U-beam) of the present invention;
fig. 10 is a bottom view of the welded assembly of corrugated steel plate and short transverse steel plate (suitable for U-beam) of the present invention;
fig. 11 is a front view of the vertical steel plate and short transverse steel plate welding assembly (applicable U-beam + shear connector is perforated steel plate) of the present invention;
fig. 12 is a left side view of the vertical steel plate and short horizontal steel plate welding assembly (applicable U-beam + shear connector is perforated steel plate) of the present invention;
fig. 13 is a bottom view of the vertical steel plate and short and horizontal steel plate welding assembly (applicable U-beam + shear connector is perforated steel plate) of the present invention;
fig. 14 is a front view of the vertical steel plate and short transverse steel plate welding assembly (suitable for I-beam + shear connector is stud);
fig. 15 is a left side view of the vertical steel plate and short transverse steel plate welding assembly (suitable for I-beam + shear connector is stud);
fig. 16 is a front view of the welded assembly of corrugated steel plate and short transverse steel plate (stud for I-beam + shear connector) of the present invention;
fig. 17 is a left side view of the welded assembly of corrugated steel plate and short transverse steel plate (i.e. stud for I-beam + shear connector) of the present invention;
fig. 18 is a front view of the vertical steel plate and short transverse steel plate welding assembly (applicable to the I-beam + the shear connector is a steel plate with holes) of the present invention;
fig. 19 is a left side view of the vertical steel plate and short horizontal steel plate welding assembly (applicable I-beam + shear connector is perforated steel plate) of the present invention;
in the figure, 1-vertical steel plate, 2-short transverse steel plate, 3-stud, 4-stirrup, 5-stress steel bar, 6-concrete, 7-corrugated pipe, 8-preformed hole, 9-steel plate with hole, 10-corrugated steel plate, 11-shear pin, 12-prestressed rib, and 13-long transverse steel plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 19, a precast concrete beam and concrete slab composite beam with a built-in steel plate comprises a precast concrete beam and a precast concrete slab, wherein the precast concrete slab is fixedly arranged at the top end of a web plate of the precast concrete beam; the precast concrete beam comprises two structural forms, namely a precast concrete U beam and a precast concrete I beam; when the structural form of the precast concrete U beam is adopted, a vertical steel plate 1 is fixedly arranged inside a web plate of the precast concrete U beam, a short transverse steel plate 2 is fixedly arranged inside an upper flange of the precast concrete U beam, and the short transverse steel plate 2 is fixedly connected with the top of the vertical steel plate 1 in a welding manner; a long transverse steel plate 13 is fixedly arranged in the lower flange of the precast concrete U beam or the long transverse steel plate 13 is not arranged, when the long transverse steel plate 13 is fixedly arranged in the lower flange of the precast concrete U beam, the long transverse steel plate 13 is fixedly connected with the bottom of the vertical steel plate 1 in a welding manner, and a plurality of shear connectors are uniformly welded on the surfaces of the two sides of the long transverse steel plate 13 and the vertical steel plate 1; when the structural form of the precast concrete I beam is adopted, a vertical steel plate 1 is fixedly arranged inside a web plate of the precast concrete I beam, a short transverse steel plate 2 is fixedly arranged in a lower flange of the precast concrete I beam, the short transverse steel plate 2 is fixedly connected with the vertical steel plate 1 in a welding mode, a plurality of shear connectors are uniformly welded on the surfaces of two sides of the vertical steel plate 1, and a plurality of shear connectors are uniformly welded on the lower surface of the short transverse steel plate 2.
When the precast concrete U beam is a prestressed precast concrete U beam, the prestressed tendons 12 are arranged inside the lower flange of the precast concrete U beam, and the corrugated pipes 7 are arranged outside the prestressed tendons 12 in advance.
When the precast concrete I beam is a prestressed precast concrete I beam, the prestressed tendons 12 are arranged inside the lower flange of the precast concrete I beam, and the corrugated pipes 7 are arranged outside the prestressed tendons 12 in advance.
The vertical steel plate 1 can be replaced by a corrugated steel plate 10.
The shear connector adopts a stud 3 or a steel plate 9 with holes.
The construction method of the precast concrete beam with the built-in steel plate and the concrete slab combination beam comprises the following steps:
the method comprises the following steps: preparing a short transverse steel plate 2, a vertical steel plate 1 or a corrugated steel plate 10 with designed dimensions according to the design height of a web plate, when adopting the structural form of a precast concrete U beam, if a long transverse steel plate 13 is required to be arranged, then preparing a long transverse steel plate 13 with designed dimensions, and if the long transverse steel plate 13 is not required, then not preparing the long transverse steel plate 13; meanwhile, a reserved hole 8 for the stirrup 4 to pass through needs to be machined at a specified position on the short transverse steel plate 2, the vertical steel plate 1 or the corrugated steel plate 10; if the long transverse steel plate 13 is prepared, a reserved hole 8 for the stirrup 4 to pass through is also required to be processed at a specified position on the long transverse steel plate 13;
step two: firstly welding the studs 3 or the steel plates with holes 9 on the surfaces of the short transverse steel plates 2, the vertical steel plates 1 or the corrugated steel plates 10, and then welding the short transverse steel plates 2 and the vertical steel plates 1 or the corrugated steel plates 10 together to form a steel plate assembly; if the structural form of the precast concrete U beam is adopted and the long transverse steel plate 13 is prepared, the long transverse steel plate 13 and the vertical steel plate 1 or the corrugated steel plate 10 need to be welded together, and meanwhile, the shear nails 11 are welded on the upper surface of the short transverse steel plate 2;
step three: manufacturing a precast concrete slab; firstly, supporting a template, then binding a reinforcement cage, arranging a pre-embedded mold to form a shear nail pre-embedded hole, and finally pouring concrete into the template until the concrete is cured and formed, and finishing the manufacturing of the precast concrete plate;
step four: manufacturing a precast concrete beam; firstly, supporting a template, then binding a reinforcement cage, placing the welded steel plate assembly into the reinforcement cage, and fixing the assembly; when the prestressed precast concrete U beam/I beam is adopted, the corrugated pipe 7 and the prestressed tendons 12 are required to be arranged inside the lower flange of the precast concrete U beam/I beam;
step five: pouring concrete into the template until the concrete is cured and formed, tensioning the prestressed tendons 12, fixing the prestressed tendons 12 by using an anchorage device, and finishing the manufacturing of the precast concrete beam;
step six: and (2) taking the manufactured precast concrete beam as a base, hoisting the manufactured precast concrete plate to the top of the precast concrete beam, enabling the shear nails 11 at the top of the precast concrete beam to accurately enter the shear nail embedded holes of the precast concrete plate, pouring building glue or high-strength mortar into the shear nail embedded holes until the shear nails 11 are packaged and fixed, and at the moment, fixedly connecting the precast concrete plate and the precast concrete beam into a whole, thus finishing construction.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. The utility model provides a precast concrete roof beam and concrete slab combination beam of built-in steel sheet which characterized in that: the precast concrete beam comprises a precast concrete beam and a precast concrete plate, wherein the precast concrete plate is fixedly arranged at the top end of a web plate of the precast concrete beam; the precast concrete beam comprises two structural forms, namely a precast concrete U beam and a precast concrete I beam; when the structural form of the precast concrete U beam is adopted, a vertical steel plate is fixedly arranged inside a web plate of the precast concrete U beam, a short transverse steel plate is fixedly arranged inside an upper flange of the precast concrete U beam, and the short transverse steel plate is fixedly connected with the top of the vertical steel plate in a welding manner; the lower flange of the precast concrete U beam is fixedly provided with a long transverse steel plate or is not provided with the long transverse steel plate, when the lower flange of the precast concrete U beam is fixedly provided with the long transverse steel plate, the long transverse steel plate is fixedly connected with the bottom of the vertical steel plate in a welding way, and a plurality of shear connectors are uniformly welded on the surfaces of the two sides of the long transverse steel plate and the vertical steel plate; when the structural form of the precast concrete I beam is adopted, a vertical steel plate is fixedly arranged inside a web plate of the precast concrete I beam, a short transverse steel plate is fixedly arranged in a lower flange of the precast concrete I beam and fixedly connected with the vertical steel plate in a welding mode, a plurality of shear connectors are uniformly welded on the surfaces of two sides of the vertical steel plate, and a plurality of shear connectors are uniformly welded on the lower surface of the short transverse steel plate.
2. A precast concrete beam and concrete panel combination beam with a built-in steel plate according to claim 1, wherein: when the precast concrete U beam is a prestressed precast concrete U beam, a prestressed rib is arranged inside the lower flange of the precast concrete U beam, and a corrugated pipe is arranged outside the prestressed rib in advance.
3. A precast concrete beam and concrete panel combination beam with a built-in steel plate according to claim 1, wherein: when the precast concrete I beam is a prestressed precast concrete I beam, a prestressed rib is arranged inside the lower flange of the precast concrete I beam, and a corrugated pipe is arranged outside the prestressed rib in advance.
4. A precast concrete beam and concrete panel combination beam with a built-in steel plate according to claim 1, wherein: the vertical steel plate can be replaced by a corrugated steel plate.
5. A precast concrete beam and concrete panel combination beam with a built-in steel plate according to claim 1, wherein: the shear connector adopts studs or steel plates with holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921998949.XU CN211645941U (en) | 2019-11-19 | 2019-11-19 | Precast concrete beam and concrete slab combination beam with built-in steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921998949.XU CN211645941U (en) | 2019-11-19 | 2019-11-19 | Precast concrete beam and concrete slab combination beam with built-in steel plate |
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| Publication Number | Publication Date |
|---|---|
| CN211645941U true CN211645941U (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921998949.XU Active CN211645941U (en) | 2019-11-19 | 2019-11-19 | Precast concrete beam and concrete slab combination beam with built-in steel plate |
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| CN (1) | CN211645941U (en) |
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