CN103397592A - Ellipse steel dowel bar for cement concrete pavement - Google Patents
Ellipse steel dowel bar for cement concrete pavement Download PDFInfo
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- CN103397592A CN103397592A CN2013103218598A CN201310321859A CN103397592A CN 103397592 A CN103397592 A CN 103397592A CN 2013103218598 A CN2013103218598 A CN 2013103218598A CN 201310321859 A CN201310321859 A CN 201310321859A CN 103397592 A CN103397592 A CN 103397592A
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- dowel bar
- cement concrete
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- concrete
- concrete pavement
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Abstract
The invention discloses an ellipse steel dowel bar for a cement concrete pavement, which is made of steel, and plays a good role in the protection of the pavement. Compared with the common round dowel bar, the ellipse steel dowel bar has the advantages that the contact stress between the dowel bar and the concrete is reduced, so that the damage of the dowel bar and the pavement concrete in the surface contact is not easy to cause, and the durability of the structure is greatly improved; in addition, the ellipse steel dowel bar and the concrete have a large contact area, the contact area of the dowel bar and the pavement concrete is increased, the combination of the dowel bar and the concrete is good, and the loading transferring effect is improved compared with the loading transferring effect of the round dowel bar, so that the ellipse steel dowel bar has a large business prospect and economical benefits and is widely applied in the field of road traffic construction.
Description
Technical field
The invention belongs to the highway construction field, relate to a kind of oval steel dowel bar for cement concrete pavement.
Technical background
A large amount of cement pavement highway condition investigations is found, has the destruction of cement pavement now take break plate and faulting of slab ends as main mode of failure.These pavement destructions in the vehicle ride quality, have shortened the application life on road surface greatly on having a strong impact on road surface, make building with maintenance costs of road increase substantially.Given this, " the highway cement concrete pavement design specifications " that country promulgates version in 2003 is further emphasized the importance of load transfer device between the 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 with concrete contacts, cause 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.
Summary of the invention
The objective of the invention is oval steel dowel bar and substitute traditional cement pavement with circular steel dowel bar, a kind of oval steel dowel bar for cement concrete pavement is provided, save the highway construction cost, improved the pavement performance of dowel bar, increased the durability of road structure.
The present invention is achieved by the 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; reduce dowel bar and concrete contact stress in order to plate when cement concrete pavement is subjected to load; prevent that stress is concentrated, the 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.
The present invention compared with prior art, has following advantage and beneficial effect:
(1) compare circular steel dowel bar, the contact stress between oval dowel bar and concrete is less, has reduced dowel bar and pavement concrete in the possibility that Surface Contact damages, and 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;
Difficult fixing when (3) traditional circular steel dowel bar is constructed, easily produce and be offset, in case skew makes stuck pavement joint cement pavement can't expand with heat and contract with cold, thereby causes the early damage on road surface.And make oval steel dowel bar can avoid well this problem, be more prone to fixing, constructability while due to shaped flat, making construction.
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Description of drawings
Fig. 1 is the schematic diagram that the present invention is used for load transfer system between Cement Concrete Pavement Slab;
Fig. 2 is the elliptical section schematic diagram of dowel bar of the present invention.
In figure: 1-wheel load, 2-Cement Concrete Pavement Slab, 3-dowel bar, transverse joint between the 4-plate.
The specific embodiment
, in order to understand better the present invention, below in conjunction with accompanying drawing, the present invention 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; reduce dowel bar and concrete contact stress in order to plate when cement concrete pavement is subjected to load; 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 the Cement Concrete Pavement Slab 2 near transverse joint 4 places between plate; dowel bar 3 is delivered to a part of wheel load 1 on 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 invention, to reduce aspect contact stress performance better, has better durability, and is difficult for causing the damage at Surface Contact of dowel bar and pavement concrete, and is better with concrete associativity; In addition, in work progress, circular dowel bar easily is offset displacement, in case skew, with stuck pavement joint, makes cement pavement to expand with heat and contract with cold, and causes the early damage on road surface, and oval dowel bar can be avoided this problem well in work progress,, due to shaped flat, be easy to firmly constructability.
The above embodiment of the present invention is only for example of the present invention clearly is described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.All any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in the protection domain of the claims in the present invention.
Claims (2)
1. oval steel dowel bar that is used 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; reduce dowel bar and concrete contact stress in order to plate when cement concrete pavement is subjected to load; 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, it is characterized in that: the length of described oval-shaped semi-minor axis is 9 ~ 20mm, the length of major semiaxis is 13 ~ 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103218598A CN103397592A (en) | 2013-07-29 | 2013-07-29 | Ellipse steel dowel bar for cement concrete pavement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103218598A CN103397592A (en) | 2013-07-29 | 2013-07-29 | Ellipse steel dowel bar for cement concrete pavement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103397592A true CN103397592A (en) | 2013-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103218598A Pending CN103397592A (en) | 2013-07-29 | 2013-07-29 | Ellipse steel dowel bar for cement concrete pavement |
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| CN (1) | CN103397592A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924501A (en) * | 2014-05-05 | 2014-07-16 | 湖北工业大学 | Reinforcing construction method in partial failure repairing of rural cement pavement |
| CN104532711A (en) * | 2014-12-20 | 2015-04-22 | 华南理工大学 | Cement concrete pavement and dual-layer paving method |
| CN108086113A (en) * | 2017-11-15 | 2018-05-29 | 广东省建筑科学研究院集团股份有限公司 | A kind of road surface precast assembly fast repairing method for being suitable for southern damp-heat area |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2832896Y (en) * | 2005-05-27 | 2006-11-01 | 华南理工大学 | Composite dowel bar for cement concrete pavement |
| CN100451238C (en) * | 2005-12-09 | 2009-01-14 | 华南理工大学 | Composite material dowel steel for cement concrete road and its preparing method |
| CN201428099Y (en) * | 2009-02-12 | 2010-03-24 | 重庆交通大学 | Dowel bar structure for preventive treatment of faulting on old cement concrete pavement |
| CN102979025A (en) * | 2012-12-24 | 2013-03-20 | 中国民航大学 | Dowel steel of cement concrete pavement slab |
| CN203429542U (en) * | 2013-07-29 | 2014-02-12 | 华南理工大学 | Elliptical steel dowel bar for cement concrete pavement |
-
2013
- 2013-07-29 CN CN2013103218598A patent/CN103397592A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2832896Y (en) * | 2005-05-27 | 2006-11-01 | 华南理工大学 | Composite dowel bar for cement concrete pavement |
| CN100451238C (en) * | 2005-12-09 | 2009-01-14 | 华南理工大学 | Composite material dowel steel for cement concrete road and its preparing method |
| CN201428099Y (en) * | 2009-02-12 | 2010-03-24 | 重庆交通大学 | Dowel bar structure for preventive treatment of faulting on old cement concrete pavement |
| CN102979025A (en) * | 2012-12-24 | 2013-03-20 | 中国民航大学 | Dowel steel of cement concrete pavement slab |
| CN203429542U (en) * | 2013-07-29 | 2014-02-12 | 华南理工大学 | Elliptical steel dowel bar for cement concrete pavement |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924501A (en) * | 2014-05-05 | 2014-07-16 | 湖北工业大学 | Reinforcing construction method in partial failure repairing of rural cement pavement |
| CN103924501B (en) * | 2014-05-05 | 2016-03-30 | 湖北工业大学 | Reinforcement construction method in the cement pavement local failure reparation of a kind of rural area |
| CN104532711A (en) * | 2014-12-20 | 2015-04-22 | 华南理工大学 | Cement concrete pavement and dual-layer paving method |
| CN108086113A (en) * | 2017-11-15 | 2018-05-29 | 广东省建筑科学研究院集团股份有限公司 | A kind of road surface precast assembly fast repairing method for being suitable for southern damp-heat area |
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Application publication date: 20131120 |