CN202492793U - Large-diameter bonding-free prestress stressed unit - Google Patents
Large-diameter bonding-free prestress stressed unit Download PDFInfo
- Publication number
- CN202492793U CN202492793U CN2012201387465U CN201220138746U CN202492793U CN 202492793 U CN202492793 U CN 202492793U CN 2012201387465 U CN2012201387465 U CN 2012201387465U CN 201220138746 U CN201220138746 U CN 201220138746U CN 202492793 U CN202492793 U CN 202492793U
- Authority
- CN
- China
- Prior art keywords
- steel bar
- prestress
- prestressed steel
- diameter
- free
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 33
- 239000010959 steel Substances 0.000 claims abstract description 33
- 238000004873 anchoring Methods 0.000 claims abstract description 9
- 229920001903 high density polyethylene Polymers 0.000 claims description 4
- 239000004700 high-density polyethylene Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- DBPRUZCKPFOVDV-UHFFFAOYSA-N Clorprenaline hydrochloride Chemical compound O.Cl.CC(C)NCC(O)C1=CC=CC=C1Cl DBPRUZCKPFOVDV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004567 concrete Substances 0.000 abstract description 7
- 239000004519 grease Substances 0.000 abstract description 3
- 230000002421 anti-septic effect Effects 0.000 abstract 2
- 230000001050 lubricating effect Effects 0.000 abstract 2
- 230000001681 protective effect Effects 0.000 abstract 2
- 229920013716 polyethylene resin Polymers 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910000754 Wrought iron Inorganic materials 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Reinforcement Elements For Buildings (AREA)
Abstract
A large-diameter bonding-free prestress stressed unit comprises a prestress steel bar, matched anchor backing plates and anchoring nuts, wherein the prestress steel bar, the matched anchor backing plates and the anchoring nuts are assembled together in a combined mode. The diameter of the prestress steel bar is 10-25 millimeters, the surface of the prestress steel bar is coated with antiseptic lubricating grease and is covered with a protective jacket, and two ends of the prestress steel bar are provided with end threads with a thread pitch of 1.5 millimeters. The large-diameter bonding-free prestress stressed unit has the advantages of being simple in structure, the surface of the prestress steel bar is covered with the polyethylene resin protective jacket after being coated with the antiseptic lubricating grease, and the bonding-free structure of the steel bar and concrete is formed. Therefore, the surface of the steel bar is prevented from being corroded by air and water which are inside the concrete, shear resistant performance of the concrete structure is improved, the usage amount of steel products is lowered.
Description
Technical field
The utility model relates to prestressing force stress unit technical field, especially relates to a kind of major diameter prestressing without bondn rod iron stress unit.
Background technology
Particularly a kind of high-speed railway bridge prestressed concrete continuous beam, isostructural stressed list of continuous rigid frame of being used for
At present, the vertical prestressing system of high-speed railway bridge raising middle flask web is main with finish rolling deformed bar, and the coarse and tensioning equipment of its screw thread does not match, and the effective prestress after the stretch-draw is difficult to accurate control, and the mud jacking after the stretch-draw also brings many inconvenience to construction; Simultaneously, the applied stress of reinforcing bar generally is controlled at about 750MPa, and the material aspect has caused waste.
Therefore, a kind of appearance that is used for the high-intensity major diameter prestressing without bondn of high-speed railway bridge rod iron stress unit is necessary.
The utility model content
The utility model is to provide a kind of high-intensity major diameter prestressing without bondn of high-speed railway bridge rod iron stress unit that is used for for solving the problems of the technologies described above.
The technical problem that the utility model solved adopts following technical scheme to realize:
A kind of major diameter prestressing without bondn stress unit; Comprise prestressed steel bar and supporting anchor plate, anchoring nut, said prestressed steel bar and said supporting anchor plate, said anchoring nut combinations are assembled together, wherein; The prestressed steel bar diameter is 10-25mm; Said prestressed steel bar surfaces coated is covered with cosmoline fat, and is coated with sheath, is provided with the end thread that pitch is 1.5mm at the prestressed steel bar two ends.
Preferably, said prestressed steel bar is a underrelaxation light round steel bar, and its diameter is 10-25mm, and intensity rank is 1420MPa or 1570MPa, and ductility is 35, and prestress system adopts the stretch-draw anchor mode.
Further, said sheath is the high-density polyethylene resin sheath.
The beneficial effect that the utlity model has is: simple in structure; Behind the anticorrosion grease of prestressed steel bar surface-coated; Coated by the polyvinyl resin sheath, form the structure that rod iron and concrete do not have bonding, avoided the rod iron surface by the corrosion of air in the concrete and moisture; Improve the shear behavior of concrete structure, reduced the steel use amount.
Description of drawings
Fig. 1 is the utility model: a kind of structural representation of major diameter prestressing without bondn stress unit;
Among the figure: 1-prestressed steel bar, 2-anchor plate, 3-anchoring nut, 4-high-density polyethylene resin sheath, 5-end thread.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
With reference to shown in Figure 1, a kind of major diameter prestressing without bondn stress unit comprises prestressed steel bar 1 and supporting anchor plate 2, anchoring nut 3; Prestressed steel bar 1 and supporting anchor plate 2, anchoring nut 3 combine and assemble are together; Wherein, prestressed steel bar 1 diameter is 10-25mm, and prestressed steel bar 1 surfaces coated is covered with cosmoline fat; And be coated with high-density polyethylene resin sheath 4, be provided with the end thread 5 that pitch is 1.5mm at prestressed steel bar 1 two ends.
More than show and described basic principle of the utility model and the advantage of principal character and the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the manual that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. major diameter prestressing without bondn stress unit; Comprise prestressed steel bar and supporting anchor plate, anchoring nut, said prestressed steel bar and said supporting anchor plate, said anchoring nut combinations are assembled together, wherein; The prestressed steel bar diameter is 10-25mm; Said prestressed steel bar surfaces coated is covered with cosmoline fat, and is coated with sheath, is provided with the end thread that pitch is 1.5mm at the prestressed steel bar two ends.
2. a kind of major diameter prestressing without bondn stress unit according to claim 1; It is characterized in that said prestressed steel bar is a underrelaxation light round steel bar, its diameter is 10-25mm, and intensity rank is 1420MPa or 1570MPa; Ductility is 35, and prestress system adopts the stretch-draw anchor mode.
3. a kind of major diameter prestressing without bondn stress unit according to claim 1 is characterized in that said sheath is the high-density polyethylene resin sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201387465U CN202492793U (en) | 2012-04-05 | 2012-04-05 | Large-diameter bonding-free prestress stressed unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201387465U CN202492793U (en) | 2012-04-05 | 2012-04-05 | Large-diameter bonding-free prestress stressed unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202492793U true CN202492793U (en) | 2012-10-17 |
Family
ID=46999028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201387465U Expired - Lifetime CN202492793U (en) | 2012-04-05 | 2012-04-05 | Large-diameter bonding-free prestress stressed unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202492793U (en) |
-
2012
- 2012-04-05 CN CN2012201387465U patent/CN202492793U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121017 |