CN2391907Y - High performance, prestress and high strength concrete hollow flooring for bridge - Google Patents
High performance, prestress and high strength concrete hollow flooring for bridge Download PDFInfo
- Publication number
- CN2391907Y CN2391907Y CN 99254934 CN99254934U CN2391907Y CN 2391907 Y CN2391907 Y CN 2391907Y CN 99254934 CN99254934 CN 99254934 CN 99254934 U CN99254934 U CN 99254934U CN 2391907 Y CN2391907 Y CN 2391907Y
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- CN
- China
- Prior art keywords
- strength concrete
- prestress
- hollowcore slab
- high strength
- bridge floor
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- Expired - Fee Related
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Abstract
The utility model discloses a high-performance prestress and high strength concrete hollow flooring for bridges, which comprises reinforced bars and high strength concrete, wherein, the inner part of the high-performance prestress and high strength concrete hollow flooring for bridges is provided with a plurality of hollow holes; steel strands or steel wires which have high uniform elongation rate are buried in the high strength concrete. The high-performance prestress and high strength concrete hollow flooring for bridges has the advantages of strong shock resistance and strong elongation performance. Simultaneously, the concrete quantity can be saved by more than 20 percents.
Description
The utility model relates to a kind of bridge precast hollow slab, especially a kind of high efficient prestress strong concrete bridge floor hollowcore slab.
At present in the highway engineering in China, in the particularly medium and small construction of striding bridge, mostly use the prestressed concrete precast hollow slab, this is because hollowcore slab itself has enough strength and stiffness, can in advance prefabricatedly compare, be not subjected to the influence of construction environment, can splice use at any time with the job practices of cast-in-site, efficiency of construction is greatly improved, can saves great amount of manpower and material resources and financial resources simultaneously.But existing precast hollow slab also comes with some shortcomings: 1, because concrete grade is lower, be generally C40～C50, its compressive strength is lower, so cause the building height height of hollowcore slab, material usage is big, and corrosion resistance is low.2, the prestressing steel of Cai Yonging, its elongation per unit length is less, thereby causes hollowcore slab ductility poor, easily brittle failure, stiffness is lower.
The purpose of this utility model provides a kind of saving material, improves structure ductility, and anti-impact force is strong, the high efficient prestress strong concrete bridge floor hollowcore slab that stiffness is strong.
The technical solution of the utility model is: a kind of high efficient prestress high-strength concrete bridge floor hollowcore slab, comprise reinforcing bar and high-strength concrete, portion is provided with some hollow holes within it, is embedded with high evenly prestressing force steel hinge line or steel wire in above-mentioned high efficient prestress high-strength concrete.
Above-mentioned hollow hole is the arched door shape.
Above-mentioned prestressing force steel hinge line or steel wire elongation per unit length are greater than 5%.
Above-mentioned concrete grade is greater than C70.
Advantage of the present utility model is as follows:
1, the employed high-strength mixed soil of doubting of bridge floor hollowcore slab is that adding benzene sulphur is composite water-reducing agent with conventional cement, sandstone material, the C70 that construction technology routinely processes, and the concrete of the above label of C80, its resistance to compression degree height, load-carrying properties are good, and structure ductility is good.
2, pre-buried prestressing force steel hinge line in the concrete, this prestressing force steel hinge line plays the tension effect jointly with embedded bar, and plate is applied prestressing force with pre-tensioning system or post stretching, because it is big to be distributed in the steel hinge line elongation per unit length of hollowcore slab bottom, so just can improve the structure ductility of hollowcore slab.
3, owing to adopt C70, the above strong concrete of C80, the thickness of bridge floor hollowcore slab is reduced, adopt arched door formula hollow hole simultaneously, can save amount of concrete like this more than 20%, can make the weight reduction of this bridge floor hollowcore slab, thereby reduce pier and Foundation Design amount, the cost of integral bridge structure is reduced.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is the vertical view of high efficient prestress strong concrete bridge floor hollowcore slab;
Fig. 2 is the sectional view of Fig. 1 at the A-A face.
Structure of the present utility model comprises reinforcing bar 1 and high-strength concrete layer 2 as shown in Figure 1 and Figure 2, and in order to alleviate the deadweight of hollowcore slab, hollow hole is wherein made arched door shape 3, is embedded with high uniform elongation prestressing force steel hinge line 4 or steel wire 4 among the bottom surface of hollowcore slab.
Claims (4)
1, a kind of high efficient prestress high-strength concrete bridge floor hollowcore slab comprises reinforcing bar and high-strength concrete, and portion is provided with some hollow holes within it, it is characterized in that, is embedded with prestressing force steel hinge line or steel wire in above-mentioned high-strength concrete.
2, high efficient prestress strong concrete bridge floor hollowcore slab according to claim 1 is characterized in that above-mentioned hollow hole is the arched door shape.
3, high efficient prestress strong concrete bridge floor hollowcore slab according to claim 1 is characterized in that above-mentioned prestressing force steel hinge line or steel wire elongation per unit length are greater than 5%.
4, high efficient prestress strong concrete bridge floor hollowcore slab according to claim 1 is characterized in that above-mentioned concrete grade is greater than C70.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99254934 CN2391907Y (en) | 1999-12-01 | 1999-12-01 | High performance, prestress and high strength concrete hollow flooring for bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99254934 CN2391907Y (en) | 1999-12-01 | 1999-12-01 | High performance, prestress and high strength concrete hollow flooring for bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2391907Y true CN2391907Y (en) | 2000-08-16 |
Family
ID=34038406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99254934 Expired - Fee Related CN2391907Y (en) | 1999-12-01 | 1999-12-01 | High performance, prestress and high strength concrete hollow flooring for bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2391907Y (en) |
-
1999
- 1999-12-01 CN CN 99254934 patent/CN2391907Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |