CN204551219U - The stage transverse prestress structure of oblique hinged precast hollow slab beam bridge - Google Patents
The stage transverse prestress structure of oblique hinged precast hollow slab beam bridge Download PDFInfo
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- CN204551219U CN204551219U CN201520205133.2U CN201520205133U CN204551219U CN 204551219 U CN204551219 U CN 204551219U CN 201520205133 U CN201520205133 U CN 201520205133U CN 204551219 U CN204551219 U CN 204551219U
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- hollow slab
- slab beam
- duct
- transverse prestress
- hinged
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Abstract
The utility model relates to the stage transverse prestress structure of a kind of oblique hinged precast hollow slab beam bridge, comprise the hollow slab beam of some pieces of prefabricated proper alignment, be stitch for the hinge of concreting between described two adjacent vacant core beams, described hollow slab beam is reserved with the duct for applying transverse prestress, the transversely prestressed bars for connecting at least two pieces of hollow slab beams after stretch-draw is equipped with in described duct, described transversely prestressed bars runs through the duct of at least two pieces of hollow slab beams, the local strengthening that all sides, described duct are fixed with for local stiffening constructs, the hollow slab beam that described hollow slab beam is adjacent with both sides is interconnected amongst one another.The stage transverse prestress structure of this oblique hinged precast hollow slab beam bridge can realize the lateral ties strengthening hollow slab beam, improves shear behavior, the cracking resistance of hinge seam; Solve the problem that Skewed Hollow Slab Beam Bridge end cannot apply transverse prestress.
Description
Technical field
The utility model relates to bridge construction technical field, is the stage transverse prestress structure of a kind of oblique hinged precast hollow slab beam bridge.
Background technology
At the hinged precast hollow slab beam bridge of China because of its simplicity of design, cost is low in life cycle, constructs simple and quick and industrialization degree is high, and is widely used, and can be described as the first-selected bridge type of current domestic below highway bridge 20m across footpath bridge.Lateral ties between hollowcore slab primarily of after water hinge seam concrete and realize, the object of lateral connection is that the Local Loads transverse distribution acted on lane plate is born jointly to each plate-girder, realize the work of many plates horizontal coordination, avoid the disadvantageous single slab bearing phenomenon of structure.In long-term practice, still there is a series of problem in it, as: hinge seam place concrete generally ftractures, and form longitudinal joint, this not only affects attractive in appearance, is formed hole, structure disadvantageous hole etc. time serious; The infiltration phenomenon that crack place exists, likely corrodes beam reinforced steel bar, causes the concrete spalling of hinge seam; Occur that single slab bearing phenomenon has a strong impact on the normal use of bridge what is more, reduce application life; Due to existing design, construction perfect not, it is not yet thorough to consider, can not solve well Problems existing.
Utility model content
The purpose of this utility model is for above weak point, provide and a kind ofly solve the problem that Skewed Hollow Slab Beam Bridge end cannot apply transverse prestress, improve shear behavior, the cracking resistance of hinge seam simultaneously, prevent hinge seam concrete cracking, come off, avoid the stage transverse prestress structure of the oblique of the infiltration of water hinged precast hollow slab beam bridge.
The scheme that the utility model technical solution problem adopts is, the stage transverse prestress structure of a kind of oblique hinged precast hollow slab beam bridge, comprise the hollow slab beam of some pieces of prefabricated proper alignment, be stitch for the hinge of concreting between described two adjacent vacant core beams, described hollow slab beam is reserved with the duct for applying transverse prestress, the transversely prestressed bars for connecting at least two pieces of hollow slab beams after stretch-draw is equipped with in described duct, described transversely prestressed bars runs through the duct of at least two pieces of hollow slab beams, the local strengthening that all sides, described duct are fixed with for local stiffening constructs, the hollow slab beam that described hollow slab beam is adjacent with both sides is interconnected amongst one another.
Further, the both end sides of described transversely prestressed bars is fixed with the backing plate for being firmly connected with hollow slab beam.
Further, described local strengthening is configured to some steel mesh reinforcements for preventing duct from bursting apart be connected on duct week sidewall.
Further, described hollow slab beam adopts concrete material to make in advance.
Further, the inner steel mesh reinforcement being also provided with reinforcement of described hinge seam.
Compared with prior art, the utility model has following beneficial effect: this structure adopts stage transverse prestress applying method, when Skewed Hollow Slab Beam Bridge end Shi Hanzhang, end can be made fully to obtain required precompression, thus change the past owing to only applying precompression at middle straight line position, and make Skewed Hollow Slab Beam Bridge end be in the situation of scarce precompression; Owing to being applied with transverse prestress to Hollow Slab Beam Bridge, make to cut with scissors the state that seam is in precompressed everywhere, from the angle of friction shear resisting, the stiction of adjacent plate-girder at hinge seam place can be improved by horizontal Shi Hanzhang, and then improve the shear resistance of hinge seam.From the angle of cracking, due to the existence of precompression, avoid or delayed the generation in crack, strengthening hinge seam cracking resistance.From lateral connection, apply the lateral ties that transverse prestress strengthens bridge, improve the cross direction profiles of bridge; Transverse prestress is applied to bridge, also can reduce the thickness of deck paving accordingly, improve durability and the economy of bridge from every side.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model patent is further illustrated.
Fig. 1 is the structural representation of hollow slab beam;
Fig. 2 is the structural representation of this utility model;
Fig. 3 is the working state schematic representation of this utility model;
In figure:
1-hollow slab beam; 2-cuts with scissors seam; 3-duct; 4-transversely prestressed bars; 5-local strengthening constructs; 6-backing plate; 7-bridge floor.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is further illustrated.
As shown in Figures 1 to 3, the stage transverse prestress structure of a kind of oblique hinged precast hollow slab beam bridge, comprise the hollow slab beam 1 of some pieces of prefabricated proper alignment, it is the hinge seam 2 for concreting between described two adjacent vacant core beams 1, described hollow slab beam 1 is reserved with the duct 3 for applying transverse prestress, the transversely prestressed bars 4 for connecting at least two pieces of hollow slab beams 1 after stretch-draw is equipped with in described duct 3, described transversely prestressed bars 4 runs through the duct 3 of at least two pieces of hollow slab beams 1, 3 weeks sides, described duct are fixed with the local strengthening structure 5 for local stiffening, the hollow slab beam that described hollow slab beam 1 is adjacent with both sides is interconnected amongst one another.
In the present embodiment, the both end sides of described transversely prestressed bars 4 is fixed with the backing plate 6 for being firmly connected with hollow slab beam 1.
In the present embodiment, described local strengthening structure 5 is some steel mesh reinforcements for preventing duct 3 from bursting apart be connected on the 3 weeks sidewalls in duct.
In the present embodiment, directly carry out wearing of transversely prestressed bars 4 during described duct 3 constructability and draw, and utilize local strengthening to construct around 5 pairs of ducts 3 to carry out consolidation process, prevent from being damaged by pressure during Shi Hanzhang.
In the present embodiment, described hollow slab beam 1 adopts concrete material to make in advance.
In the present embodiment, described hinge seam 2 inside is also provided with the steel mesh reinforcement of reinforcement.
Specific implementation process: this structure passes through stage Shi Hanzhang, along with the progress of construction applies transverse prestress stage by stage.First stage, after the first and second hollow slab beam 1 installations, build hinge seam 2 concrete, before concrete initial set, by presstressed reinforcing steel 4, transverse prestress is applied to the first and second hollow slab beams, ensure that concrete is in pressured state, avoid cracking, its tension sequence keeps the symmetrical simultaneous tension in both sides; Second stage, 3rd hollow slab beam is installed, builds hinge seam 2 concrete, by presstressed reinforcing steel to second and the 3rd hollow slab beam apply transverse prestress, the rest may be inferred until complete the installation of all hollow slab beams, after the stretch-draw of presstressed reinforcing steel completes, finally carry out mating formation of bridge floor 7.
Above-listed preferred embodiment; the purpose of this utility model, technical scheme and advantage are further described; be understood that; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. the stage transverse prestress structure of an oblique hinged precast hollow slab beam bridge, comprise the hollow slab beam of some pieces of prefabricated proper alignment, it is characterized in that: for the hinge for concreting is stitched between described two adjacent vacant core beams, described hollow slab beam is reserved with the duct for applying transverse prestress, the transversely prestressed bars for connecting at least two pieces of hollow slab beams after stretch-draw is equipped with in described duct, described transversely prestressed bars runs through the duct of at least two pieces of hollow slab beams, the local strengthening that all sides, described duct are fixed with for local stiffening constructs, the hollow slab beam that described hollow slab beam is adjacent with both sides is interconnected amongst one another.
2. the stage transverse prestress structure of oblique according to claim 1 hinged precast hollow slab beam bridge, is characterized in that: the both end sides of described transversely prestressed bars is fixed with the backing plate for being firmly connected with hollow slab beam.
3. the stage transverse prestress structure of oblique according to claim 1 hinged precast hollow slab beam bridge, is characterized in that: described local strengthening is configured to some steel mesh reinforcements for preventing duct from bursting apart be connected on duct week sidewall.
4. the stage transverse prestress structure of oblique according to claim 1 hinged precast hollow slab beam bridge, is characterized in that: described hollow slab beam adopts concrete material to make in advance.
5. the stage transverse prestress structure of oblique according to claim 1 hinged precast hollow slab beam bridge, is characterized in that: the inner steel mesh reinforcement being also provided with reinforcement of described hinge seam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520205133.2U CN204551219U (en) | 2015-04-08 | 2015-04-08 | The stage transverse prestress structure of oblique hinged precast hollow slab beam bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520205133.2U CN204551219U (en) | 2015-04-08 | 2015-04-08 | The stage transverse prestress structure of oblique hinged precast hollow slab beam bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204551219U true CN204551219U (en) | 2015-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520205133.2U Expired - Fee Related CN204551219U (en) | 2015-04-08 | 2015-04-08 | The stage transverse prestress structure of oblique hinged precast hollow slab beam bridge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672115A (en) * | 2016-04-11 | 2016-06-15 | 福州大学 | Hollow slab wide bridge structure for reinforcing hinge joints by batch transverse tensioning and construction method thereof |
| CN108442227A (en) * | 2018-03-28 | 2018-08-24 | 长安大学 | One kind preventing deck crack hollow slab bridge structure and attaching method thereof |
| CN108532835A (en) * | 2018-03-21 | 2018-09-14 | 河海大学 | A kind of pre-tension prestressed concrete beam longitudinal cracking restraining device and its construction method |
-
2015
- 2015-04-08 CN CN201520205133.2U patent/CN204551219U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672115A (en) * | 2016-04-11 | 2016-06-15 | 福州大学 | Hollow slab wide bridge structure for reinforcing hinge joints by batch transverse tensioning and construction method thereof |
| CN108532835A (en) * | 2018-03-21 | 2018-09-14 | 河海大学 | A kind of pre-tension prestressed concrete beam longitudinal cracking restraining device and its construction method |
| CN108532835B (en) * | 2018-03-21 | 2021-04-27 | 河海大学 | Longitudinal cracking restraining device for pre-tensioned prestressed concrete beam and construction method thereof |
| CN108442227A (en) * | 2018-03-28 | 2018-08-24 | 长安大学 | One kind preventing deck crack hollow slab bridge structure and attaching method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20180408 |