CN203429542U - Elliptical steel dowel bar for cement concrete pavement - Google Patents
Elliptical steel dowel bar for cement concrete pavement Download PDFInfo
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- CN203429542U CN203429542U CN201320455008.8U CN201320455008U CN203429542U CN 203429542 U CN203429542 U CN 203429542U CN 201320455008 U CN201320455008 U CN 201320455008U CN 203429542 U CN203429542 U CN 203429542U
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- dowel bar
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- pavement
- cement concrete
- concrete pavement
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Abstract
The utility model discloses an elliptical steel dowel bar for a cement concrete pavement. The dowel bar is made from steel products. According to the elliptical dowel bar disclosed by the utility model, the performance in the aspect of pavement protection is relatively good, and the contact stress between the dowel bar and concrete is reduced compared with ordinary circular dowel bars, so that the damage to the dowel bar and the pavement concrete during surface contact is difficult to cause, and the durability of a structure is improved greatly; furthermore, the elliptical dowel bar has a relatively large contact area with the concrete, so that the area of contact between the dowel bar and the pavement concrete is increased, and the combination between the dowel bar and the concrete is better; compared with the circular dowel bars, the load transferring effect can be improved, so that the elliptical dowel bar has huge business prospects and economic benefits and can be widely applied to the field of road transportation construction.
Description
Technical field
The utility model belongs to highway construction field, relates to a kind of oval steel dowel bar for cement concrete pavement.
Technical background
A large amount of cement pavement highway condition investigation finds, it is main mode of failure that the destruction of existing cement pavement be take break plate and faulting of slab ends.These pavement destructions in vehicle ride quality, have greatly shortened the application life on road surface on having a strong impact on road surface, and building with maintenance costs of road increased substantially.Given this, < < highway cement concrete pavement design specifications > > that country promulgates version in 2003 is further emphasized the importance of load transfer device between Cement Concrete Pavement Slab seam, explicitly points out for all transverse joints of high-grade highway and all will install dowel bar additional.
Yet traditional circular steel dowel bar, because hardness is excessive, easily produces stress and concentrates, thereby squeeze broken cement pavement concrete slab between the interface contacting with concrete, causes the early damage on road surface.Therefore, utilize oval-shaped steel dowel bar can increase the contact area of dowel bar and concrete interface, reduce contact stress, prevent that stress is concentrated, thereby avoid the early damage on road surface.
Utility model content
The purpose of this utility model is that oval steel dowel bar substitutes circular steel dowel bar for traditional cement pavement, a kind of oval steel dowel bar for cement concrete pavement is provided, save highway construction cost, improved the pavement performance of dowel bar, increased the durability of road structure.
The utility model is realized by following scheme:
A kind of oval steel dowel bar for cement concrete pavement; be connected between the Cement Concrete Pavement Slab with transverse joint between plate; described dowel bar cross section ovalize; in order to plate when cement concrete pavement is subject to load, reduce dowel bar and concrete contact stress; prevent that stress is concentrated, protection Cement Concrete Pavement Slab.
Further, the length of described oval-shaped semi-minor axis is 9 ~ 20mm, and the length of major semiaxis is 13 ~ 50mm.
Compared with prior art, tool has the following advantages and beneficial effect the utility model:
(1) compare circular steel dowel bar, the contact stress between oval dowel bar and concrete is less, has reduced the possibility that dowel bar and pavement concrete damage at Surface Contact, has better durability;
(2) because circular steel dowel bar and concrete surface are long-pending less, easily cause dowel bar to lose efficacy, and oval dowel bar can effectively overcome this problem, and better with concrete associativity;
(3) difficult fixing when traditional circular steel dowel bar is constructed, easily produce and be offset, once skew is by stuck pavement joint, cement pavement cannot be expanded with heat and contract with cold, thereby cause the early damage on road surface.And make oval steel dowel bar can avoid well this problem, while making to construct due to shaped flat, be more prone to fixing, constructability.
Accompanying drawing explanation
Fig. 1 is that the utility model is for the schematic diagram of load transfer system between Cement Concrete Pavement Slab;
Fig. 2 is the elliptical section schematic diagram of dowel bar of the present utility model.
In figure: 1-wheel load, 2-Cement Concrete Pavement Slab, 3-dowel bar, transverse joint between 4-plate.
The specific embodiment
In order to understand better the utility model, below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1-2; a kind of oval steel dowel bar for cement concrete pavement; be connected between the Cement Concrete Pavement Slab 2 with transverse joint 4 between plate; described dowel bar 3 cross section ovalizes; in order to plate when cement concrete pavement is subject to load, reduce dowel bar and concrete contact stress; prevent that stress is concentrated, protection Cement Concrete Pavement Slab 2.
The length of described oval-shaped semi-minor axis is 9 ~ 20mm, and the length of major semiaxis is 13 ~ 50mm.
The diameter of typical circular steel dowel bar is 22 ~ 38mm, and its sectional area is 379.94 ~ 1133.54mm
2
As shown in Figure 1; when wheel load 1 acts on wherein a Cement Concrete Pavement Slab 2 near transverse joint 4 places between plate; dowel bar 3 is delivered to a part of wheel load 1 in adjacent Cement Concrete Pavement Slab 2; reduce the distortion of the Cement Concrete Pavement Slab 2 of directly bearing wheel load 1 and the tensile stress of plate bottom; make adjacent two boards compatibility of deformation, be conducive to the protection of Cement Concrete Pavement Slab 2.
Compare circular steel dowel bar, oval steel dowel bar of the present utility model performance aspect minimizing contact stress is better, there is better durability, and be difficult for causing dowel bar and pavement concrete in the damage of Surface Contact, better with concrete associativity; In addition, in work progress, circular dowel bar is easily offset displacement, once skew, by stuck pavement joint, cannot expand with heat and contract with cold cement pavement, causes the early damage on road surface, and oval dowel bar can be avoided well this problem in work progress, due to shaped flat, be easy to firmly constructability.
Above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.All any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in the protection domain of the utility model claim.
Claims (2)
1. the oval steel dowel bar for cement concrete pavement; be connected between the Cement Concrete Pavement Slab (2) with transverse joint between plate (4); it is characterized in that: described dowel bar (3) cross section ovalize; in order to plate when cement concrete pavement is subject to load, reduce dowel bar and concrete contact stress; prevent that stress is concentrated, protection Cement Concrete Pavement Slab (2).
2. a kind of oval steel dowel bar for cement concrete pavement according to claim 1, is characterized in that: the length of described oval-shaped semi-minor axis is 9 ~ 20mm, and the length of major semiaxis is 13 ~ 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320455008.8U CN203429542U (en) | 2013-07-29 | 2013-07-29 | Elliptical steel dowel bar for cement concrete pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320455008.8U CN203429542U (en) | 2013-07-29 | 2013-07-29 | Elliptical steel dowel bar for cement concrete pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203429542U true CN203429542U (en) | 2014-02-12 |
Family
ID=50058590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320455008.8U Expired - Fee Related CN203429542U (en) | 2013-07-29 | 2013-07-29 | Elliptical steel dowel bar for cement concrete pavement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203429542U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397592A (en) * | 2013-07-29 | 2013-11-20 | 华南理工大学 | Ellipse steel dowel bar for cement concrete pavement |
| CN106012750A (en) * | 2016-07-28 | 2016-10-12 | 山西省交通科学研究院 | Cement concrete pavement force transfer rod capable of realizing seam following bending |
-
2013
- 2013-07-29 CN CN201320455008.8U patent/CN203429542U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103397592A (en) * | 2013-07-29 | 2013-11-20 | 华南理工大学 | Ellipse steel dowel bar for cement concrete pavement |
| CN106012750A (en) * | 2016-07-28 | 2016-10-12 | 山西省交通科学研究院 | Cement concrete pavement force transfer rod capable of realizing seam following bending |
| CN106012750B (en) * | 2016-07-28 | 2018-03-02 | 山西省交通科学研究院 | It is a kind of can blind stitching bending dowel bars into cement concrete pavement |
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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 |
Granted publication date: 20140212 Termination date: 20160729 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |