CN213507880U - Asphalt pavement structure for preventing reflection cracks - Google Patents
Asphalt pavement structure for preventing reflection cracks Download PDFInfo
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- CN213507880U CN213507880U CN202022000577.6U CN202022000577U CN213507880U CN 213507880 U CN213507880 U CN 213507880U CN 202022000577 U CN202022000577 U CN 202022000577U CN 213507880 U CN213507880 U CN 213507880U
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Abstract
The utility model relates to a prevent to form bituminous paving structure of reflection crack, include the basic unit and lay the asphalt concrete surface course in the basic unit, the downward joint cutting of basic unit upper surface forms induced seam to lay polyester glass fine cloth or anti crack as anti crack layer between basic unit and asphalt concrete surface course, induced seam position top, in order to prevent to form the reflection crack. The utility model discloses a bituminous paving structure is through cutting the induced joint to the basic unit, the position that the active control basic unit crack formed, the fine cloth of polyester glass has great tensile strength with anti the subsides of splitting, can effectively resist crack department tensile stress between the layer, restriction crack width development prevents to make the asphalt surface course form the reflection crack after the basic unit fracture, the fine cloth of polyester glass can also prevent the rainwater infiltration with anti the subsides of splitting simultaneously, reduces the possibility that basic unit water harmd to reach extension road life's effect.
Description
Technical Field
The utility model relates to a highway engineering, urban road engineering technical field, concretely relates to prevent to form reflection cracked bituminous pavement structure.
Background
Asphalt concrete pavements are widely used due to their advantages of flatness, no joints, low noise, comfortable driving, etc., and the corresponding pavement base course structure is usually selected from inorganic binder semi-rigid base course or lean concrete rigid base course. The base material is usually cracked under the action of driving load, thermal shrinkage or dry shrinkage, the crack is easily expanded to an asphalt surface layer, stress concentration is generated, a reflection crack is formed, early pavement diseases are caused, rainwater can be caused to infiltrate after the asphalt surface layer is cracked, further damage to a pavement structure is caused, more serious diseases such as cracking, settlement, pit and the like are caused, and even the driving safety is influenced. Therefore, in the road construction process, proper measures are taken to control the cracking of the base layer structure and prevent the base layer structure from diffusing to the asphalt surface layer to cause reflection cracks, and the method has important significance for prolonging the service life of the road.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in having the not enough of base material crack easy extension to pitch surface course to above-mentioned prior art, provides a prevent to form the cracked bituminous paving structure of reflection.
The utility model discloses a solve the technical scheme that technical problem that the aforesaid provided adopted and be:
the utility model provides a prevent to form bituminous paving structure of reflection crack, includes the basic unit and lays the asphalt concrete surface course on the basic unit, the basic unit upper surface down the joint-cutting and form induced seam to lay the anti-crack layer between basic unit and asphalt concrete surface course, above the induced seam position, in order to prevent to form the reflection crack.
In the scheme, hot asphalt, polyurethane joint filling materials or silicone joint filling materials are used for joint pouring in the induced joints.
In the scheme, the anti-cracking layer is polyester glass fiber cloth or an anti-cracking paste, and the polyester glass fiber cloth is pasted on the base layer in a mode of prime coat hot asphalt; the anti-cracking sticker has self-adhesion and is directly stuck on the base layer.
In the scheme, the width of the polyester glass fiber cloth is 1-1.5 m, the thickness of the polyester glass fiber cloth is 0.6-1.2 mm, and the polyester glass fiber cloth is symmetrically adhered above the position of the induction seam.
In the scheme, the anti-crack paste is 24cm, 32cm and 48cm in width or customized according to field requirements, 2-3 mm in thickness and symmetrically pasted above the induction seam position.
In the scheme, the polyester glass fiber cloth or the crack-resistant adhesive has a flat bottom surface, does not have the phenomena of bubbles, cracks, cavities and bulges, and does not have cracks or adhesion in a corresponding working temperature range.
In the scheme, the base layer is a lean concrete rigid base layer, the induced joint spacing of the lean concrete rigid base layer is 5.5-6.5 m, the joint cutting depth is 1/4-1/3 of the thickness of the lean concrete rigid base layer, and the joint cutting width is 1-3 mm.
In the scheme, the base layer is a semi-rigid base layer, the induced seam spacing of the semi-rigid base layer is preferably 6.5-7.5 m, the depth of the cut seam is 1/4-1/3 of the thickness of the semi-rigid base layer, and the width of the cut seam is 1-3 mm.
In the above scheme, the base layer is one or more layers, and when the base layer is designed to be a plurality of layers, only the uppermost base layer is subjected to induced seam cutting.
In the scheme, the asphalt concrete surface layer is one or more layers.
The beneficial effects of the utility model reside in that:
the utility model discloses a bituminous paving structure is through cutting the induced joint to the basic unit, the position that the active control basic unit crack formed, the fine cloth of polyester glass has great tensile strength with anti the subsides of splitting, can effectively resist crack department tensile stress between the layer, restriction crack width development prevents to make the asphalt surface course form the reflection crack after the basic unit fracture, the fine cloth of polyester glass can also prevent the rainwater infiltration with anti the subsides of splitting simultaneously, reduces the possibility that basic unit water harmd to reach extension road life's effect.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a schematic view of the asphalt pavement structure for preventing the formation of reflection cracks according to the present invention.
In the figure: 10. a base layer; 11. a lower base layer; 12. an upper base layer; 20. an asphalt concrete surface layer; 21. an asphalt concrete lower surface layer; 22. an upper asphalt concrete layer; 30. inducing a seam; 40. and (4) an anti-cracking layer.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, for the utility model provides a prevent to form bituminous paving structure of reflection crack, including basic unit 10 and lay the asphalt concrete surface course 20 on basic unit 10, the downward joint seam of basic unit 10 upper surface forms induced seam 30 to between basic unit 10 and asphalt concrete surface course 20, induced seam 30 position top is laid anti-crack layer 40, thereby effectively prevents to form the reflection crack. The anti-cracking layer 40 is polyester glass fiber cloth or anti-cracking paste, and the polyester glass fiber cloth is pasted on the base layer 10 in a mode of prime coat hot asphalt; the anti-crack label has self-adhesion and can be directly adhered to the base layer 10. The base course 10 can use a lean concrete rigid base course or a semi-rigid base course, the semi-rigid base course can be made of cement stabilized macadam, lime fly ash stabilized macadam, cement stabilized soil, lime stabilized soil and other materials, and the specific layer number and thickness of the base course 10 can be adjusted according to actual engineering requirements.
If the base layer 10 is a poor concrete rigid base layer, the distance between the induction joints 30 is preferably 5.5-6.5 m, the depth of the cut seam is preferably 1/4-1/3 of the thickness of the poor concrete rigid base layer, in order to prevent the asphalt pavement reflection crack caused by the excessively wide induction joints 30, the induction joints 30 are set to be narrow joints, and the width of the cut seam is about 1-3 mm. If the joint cutting time is too late, the poor concrete forms too high strength, so that narrow joints are not easy to construct, the joint cutting is preferably carried out within 1-2 d before the curing period of the poor concrete rigid base layer, if the joint cutting is carried out in a high-temperature season, the joint cutting can be carried out in an early time, if the joint cutting is carried out in a low-temperature season, the joint cutting can be carried out in a later time, and the integrity of the peripheral base layer material is protected during the joint cutting. And cleaning the joint in time after the joint is cut, and performing joint pouring by using hot asphalt, polyurethane joint filling materials or silicone joint filling materials.
If the base layer 10 is a semi-rigid base layer, the distance between the induction seams 30 is preferably 6.5-7.5 m, the depth of the cutting seam is preferably 1/4-1/3 of the thickness of the semi-rigid base layer, in order to prevent the asphalt pavement reflection cracks caused by the excessively wide induction seams 30, the induction seams 30 are set to be narrow seams, and the width of the cutting seam is about 1-3 mm. If the joint cutting time is too late, the semi-rigid base layer can form overlarge strength to cause that narrow joints are difficult to construct, therefore, the joint cutting is preferably carried out within 1-2 d before the health preserving period of the semi-rigid base layer, if the joint cutting is carried out in high-temperature seasons, the joint cutting can be carried out in earlier time, if the joint cutting is carried out in low-temperature seasons, the joint cutting can be carried out in later time, and the integrity of the materials of the peripheral base layer is protected during the joint cutting. And cleaning the joint in time after the joint is cut, and performing joint pouring by using hot asphalt, polyurethane joint filling materials or silicone joint filling materials.
When the base layer 10 is a multilayer, the inducing seam 30 is cut only to the upper base layer 10. In this embodiment, the base layer 10 includes two layers, i.e., a lower base layer 11 and an upper base layer 12, and only the inducing seam 30 needs to be cut in the upper base layer 12.
After crack pouring, polyester glass fiber cloth with the width of 1-1.5 m and the thickness of 0.6-1.2 mm is symmetrically adhered above the position of the induced crack 30 by using a mode of prime coat hot asphalt, or anti-crack adhesive tapes are symmetrically adhered, the width of the anti-crack adhesive tape is generally 24cm, 32cm or 48cm, and the anti-crack adhesive tape can be customized according to field requirements, and the thickness of the anti-crack adhesive tape is 2-3 mm. The polyester glass fiber cloth and the anti-crack adhesive bottom surface are smooth and free from the phenomena of bubbles, cracks, cavities, bulges and the like, and cracks or adhesion cannot occur within the corresponding working temperature range.
If the base layer 10 material is cracked in the curing process, the crack should be processed according to the processing method of the induced crack 30, that is, the crack is first grouted, and then the polyester glass fiber cloth or the crack-resistant paste is pasted.
After the polyester glass fiber cloth or the crack-resistant paste is paved, the asphalt concrete surface layer 20, including the asphalt concrete lower surface layer 21 and the asphalt concrete upper surface layer 22, can be paved.
The utility model discloses a bituminous paving structure is through cutting induced joint 30 to basic unit 10, the position that the 10 cracks of active control basic unit formed, the fine cloth of polyester glass has great tensile strength with anti the subsides of splitting, can effectively resist layer crack department tensile stress, restriction crack width development, make the asphalt surface layer form the reflection crack after preventing basic unit 10 from ftracturing, the fine cloth of polyester glass can also prevent the rainwater infiltration with anti the subsides of splitting simultaneously, reduce the possibility that basic unit 10 water harmed, thereby reach extension road life's effect.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. The utility model provides a prevent to form bituminous paving structure of reflection crack, includes the basic unit and lays the asphalt concrete surface course on the basic unit, its characterized in that, the lower joint cutting of basic unit upper surface forms induced seam to between basic unit and asphalt concrete surface course, induced seam position top lay the anti-crack layer, in order to prevent to form the reflection crack.
2. The asphalt pavement structure for preventing the formation of reflection cracks according to claim 1, wherein the induced joints are grouted using hot asphalt, polyurethane-based joint compound or silicone-based joint compound.
3. The asphalt pavement structure for preventing the formation of the reflection cracks as claimed in claim 1, wherein the crack-resistant layer is a polyester glass fiber cloth or an anti-crack sticker, and the polyester glass fiber cloth is stuck on the base layer by means of prime coat hot asphalt; the anti-cracking sticker has self-adhesion and is directly stuck on the base layer.
4. The asphalt pavement structure for preventing the formation of reflection cracks according to claim 3, wherein the polyester fiberglass cloth has a width of 1 to 1.5m and a thickness of 0.6 to 1.2mm, and is symmetrically adhered above the positions of the induced cracks.
5. The asphalt pavement structure capable of preventing the formation of the reflection cracks according to claim 3, wherein the crack resistant paste has a width of 24cm, 32cm or 48cm or is customized according to field requirements, has a thickness of 2-3 mm, and is symmetrically pasted above the positions of the induced cracks.
6. The asphalt pavement structure for preventing the formation of reflection cracks according to claim 3, wherein the polyester fiberglass cloth or the crack-resistant veneering surface is flat and free from bubbles, cracks, cavities and bulges and is free from cracks or bonding in a corresponding working temperature range.
7. The asphalt pavement structure for preventing the formation of reflection cracks according to claim 1, wherein the base layer is a low-concrete rigid base layer, the induced crack spacing of the low-concrete rigid base layer is 5.5-6.5 m, the depth of the cut is 1/4-1/3 of the thickness of the low-concrete rigid base layer, and the width of the cut is 1-3 mm.
8. The asphalt pavement structure for preventing the formation of reflection cracks according to claim 1, wherein the base layer is a semi-rigid base layer, the semi-rigid base layer preferably has a crack inducing pitch of 6.5 to 7.5m, a crack depth of 1/4 to 1/3 of the thickness of the semi-rigid base layer, and a crack width of 1 to 3 mm.
9. The asphalt pavement structure for preventing the formation of reflection cracks according to claim 1, wherein said base course is one or more layers, and when designed to be multi-layered, the cracks are induced only to the uppermost base course.
10. The asphalt pavement structure for preventing the formation of reflection cracks according to claim 1, wherein said asphalt concrete pavement is one or more layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022000577.6U CN213507880U (en) | 2020-09-14 | 2020-09-14 | Asphalt pavement structure for preventing reflection cracks |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022000577.6U CN213507880U (en) | 2020-09-14 | 2020-09-14 | Asphalt pavement structure for preventing reflection cracks |
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| CN213507880U true CN213507880U (en) | 2021-06-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561848A (en) * | 2022-03-14 | 2022-05-31 | 中国路桥工程有限责任公司 | Active induced cracking device suitable for continuous reinforced concrete pavement |
| CN114922022A (en) * | 2022-05-31 | 2022-08-19 | 广西交投科技有限公司 | Reflection-resistant asphalt pavement crack treatment method and construction process thereof |
| CN115434207A (en) * | 2022-10-13 | 2022-12-06 | 江苏长路智造科技有限公司 | Reflection crack-free semi-rigid base pavement structure and construction method thereof |
-
2020
- 2020-09-14 CN CN202022000577.6U patent/CN213507880U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114561848A (en) * | 2022-03-14 | 2022-05-31 | 中国路桥工程有限责任公司 | Active induced cracking device suitable for continuous reinforced concrete pavement |
| CN114922022A (en) * | 2022-05-31 | 2022-08-19 | 广西交投科技有限公司 | Reflection-resistant asphalt pavement crack treatment method and construction process thereof |
| CN115434207A (en) * | 2022-10-13 | 2022-12-06 | 江苏长路智造科技有限公司 | Reflection crack-free semi-rigid base pavement structure and construction method thereof |
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