CN201526005U - Prestress hollow plate girder - Google Patents
Prestress hollow plate girder Download PDFInfo
- Publication number
- CN201526005U CN201526005U CN2009202359070U CN200920235907U CN201526005U CN 201526005 U CN201526005 U CN 201526005U CN 2009202359070 U CN2009202359070 U CN 2009202359070U CN 200920235907 U CN200920235907 U CN 200920235907U CN 201526005 U CN201526005 U CN 201526005U
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- CN
- China
- Prior art keywords
- girder
- plate
- bottom plate
- hollow slab
- base plate
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- Expired - Lifetime
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Abstract
The utility model relates to a prestress hollow plate girder, which does not easily generate a longitudinal crack with small inside and outside temperature difference in the girder. The prestress hollow plate girder is formed by casting a steel bar and concrete and composed of a girder bottom plate, a girder top plate, two side plates and a girder cavity enclosed by the girder bottom plate, the girder top plate and the side plates and a plurality of perforation holes are arranged in longitudinal separation on the girder bottom plate. The inside and outside ventilation and heat exchange speed are reinforced after perforating the girder bottom plate and the inside and outside temperature difference of the girder is greatly reduced and the bottom plate is prevented from generating longitudinal crack and the inside water log is discharged outside the girder in time and the structure durability is increased.
Description
Technical field
The invention belongs to civil engineering bridge field, be specifically related to a kind of prestressed hollow slab beam.
Background technology
Prestressed hollow slab beam is widely used in the middle of the various bridge at present, it has succinct, stressed clear and definite, the making of structure, transportation, easy for installation etc., but longitudinal crack often appears in hollowcore slab beam bridge base plate, the general width of these longitudinal cracks is narrower, multidigit near span centre, have in addition be covered with whole striding.Simultaneously, cause shutoff not tight because plate-girder beam-ends head plate Chang Yinhou pouring concrete shrinks, cause the plate-girder inner cavity water accumulation, these ponding have not only increased deadweight, more can corrosion concrete, will influence its durability and and then reduction structural strength and stability if these diseases do not prevent and treat.
Therefore, study a kind of simple and effective and practical hollow slab beam neotectonics base plate longitudinal crack and plate-girder inner product edema evil is prevented and treated, the assurance of prestressed hollow slab beam bridge quality is had significance.
Summary of the invention
According to the analysis that produces reason for plate-girder bottom longitudinal crack at present, cleavage effect, corrosion of steel bar spalling or temperature effect etc. when most achievements are thought prestressed stretch-draw all have certain influence for the horizontal normal stress of prestressed hollow slab beam, particularly run the phase because temperature Change is to cause the main cause of longitudinal crack in the temperature difference of plate-girder inner chamber and outer wall generation at plate-girder, therefore the internal-external temperature difference that is necessary to take necessary construction measure to reduce plate-girder also is necessary to take measures the ponding in the prestressed hollow slab beam is discharged simultaneously to eliminate the influence of altitude temperature difference effect.
The purpose of this utility model is to overcome the defective of prior art, provides a kind of beam base plate be difficult for to produce longitudinal crack, and the prestressed hollow slab beam that has a narrow range of temperature of beam inside and outside.
The technical scheme that realizes the utility model purpose is: a kind of prestressed hollow slab beam, form by reinforcing bar and concrete pouring, comprise beam base plate, back plate, biside plate and the beam cavity that is surrounded by beam base plate, back plate and biside plate, beam base plate upper edge longitudinal separation is provided with some apertures that run through.
The utility model is in the perforate of prestressed hollow slab beam base plate, if bore hole size is controlled then to the influence of beam body bearing capacity not quite, the interval between aperture is preferably 1～2m, and the diameter of aperture is preferably 3～6cm.
Employing can reduce the beam inside and outside temperature difference greatly in the mode of prestressed hollow slab beam base plate perforate across a certain distance longitudinally, eliminate the essential condition that the base plate longitudinal crack occurs, also inner ponding in time can be discharged outside the beam, and keep inside and outside aeration-drying, also little to the influence of beam body bearing capacity.
The utility model beneficial effect is, owing to strengthened interior separate ventilation and rate of heat exchange after the perforate, can reduce the beam inside and outside temperature difference greatly, prevents the essential condition that the base plate longitudinal crack occurs, and inner ponding in time can be discharged outside the beam simultaneously, improves structure durability.
Description of drawings
Fig. 1 is the utility model embodiment 1 prestressed hollow slab beam base arrangement schematic diagram
The specific embodiment
Be described further below in conjunction with embodiment and accompanying drawing.
Embodiment 1
As shown in Figure 1, a kind of prestressed hollow slab beam 1, form by reinforcing bar and concrete pouring, comprise beam base plate 2, back plate 3, biside plate 4 and the beam cavity 5 that surrounds by beam base plate 2, back plate 3 and biside plate 4, beam base plate 2 upper edge longitudinal separations are provided with some apertures 6 that run through, aperture 6 be spaced apart 1～2m, diameter is 3～6cm.
When casting prestressed hollow slab beam between internal mold and external mold longitudinally at interval 1～2m (can make establishing the cylindrical interim built-in fitting in hole site of wooden unit or foam, about 3～the 6cm of diameter,), normally build the plate-girder concrete then, cutter went interim built-in fitting to draw out hole to get final product after maintenance to be built was finished.
Claims (3)
1. a prestressed hollow slab beam is formed by reinforcing bar and concrete pouring, comprises beam base plate, back plate, biside plate and the beam cavity that is surrounded by beam base plate, back plate and biside plate, it is characterized in that beam base plate upper edge longitudinal separation is provided with some apertures that run through.
2. prestressed hollow slab beam according to claim 1 is characterized in that, is spaced apart 1～2m between described aperture.
3. prestressed hollow slab beam according to claim 1 is characterized in that, the diameter of described aperture is 3～6cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202359070U CN201526005U (en) | 2009-09-28 | 2009-09-28 | Prestress hollow plate girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202359070U CN201526005U (en) | 2009-09-28 | 2009-09-28 | Prestress hollow plate girder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201526005U true CN201526005U (en) | 2010-07-14 |
Family
ID=42517295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202359070U Expired - Lifetime CN201526005U (en) | 2009-09-28 | 2009-09-28 | Prestress hollow plate girder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201526005U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337723A (en) * | 2011-08-05 | 2012-02-01 | 中国神华能源股份有限公司 | Bridge |
| CN102359057A (en) * | 2011-08-05 | 2012-02-22 | 中国神华能源股份有限公司 | Bridge |
| CN105088932A (en) * | 2014-05-06 | 2015-11-25 | 郑州大学 | Novel prefabricated hollow slab and hollow slab bridge construction method using same |
| CN111733696A (en) * | 2020-05-26 | 2020-10-02 | 广西翔路建设有限责任公司 | Water drainage preventing structure of corrugated steel web prestress combined box girder bridge |
-
2009
- 2009-09-28 CN CN2009202359070U patent/CN201526005U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337723A (en) * | 2011-08-05 | 2012-02-01 | 中国神华能源股份有限公司 | Bridge |
| CN102359057A (en) * | 2011-08-05 | 2012-02-22 | 中国神华能源股份有限公司 | Bridge |
| CN105088932A (en) * | 2014-05-06 | 2015-11-25 | 郑州大学 | Novel prefabricated hollow slab and hollow slab bridge construction method using same |
| CN111733696A (en) * | 2020-05-26 | 2020-10-02 | 广西翔路建设有限责任公司 | Water drainage preventing structure of corrugated steel web prestress combined box girder bridge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 211112 No. 223 Simon Street, Jiangsu, Nanjing Patentee after: JSTI GROUP Co.,Ltd. Address before: 211112 No. 223 Simon Street, Jiangsu, Nanjing Patentee before: JIANGSU TRANSPORTATION RESEARCH INSTITUTE Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100714 |