CN219930608U - Old cement pavement repair structure - Google Patents
Old cement pavement repair structure Download PDFInfo
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- CN219930608U CN219930608U CN202321574070.9U CN202321574070U CN219930608U CN 219930608 U CN219930608 U CN 219930608U CN 202321574070 U CN202321574070 U CN 202321574070U CN 219930608 U CN219930608 U CN 219930608U
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- concrete
- asphalt
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- 239000004568 cement Substances 0.000 title claims abstract description 23
- 230000008439 repair process Effects 0.000 title description 6
- 239000010410 layer Substances 0.000 claims abstract description 167
- 239000004567 concrete Substances 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000011229 interlayer Substances 0.000 claims abstract description 17
- 239000011384 asphalt concrete Substances 0.000 claims description 31
- 239000010426 asphalt Substances 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 12
- 239000003365 glass fiber Substances 0.000 claims description 11
- 239000010419 fine particle Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 4
- 239000011275 tar sand Substances 0.000 description 4
- 230000000116 mitigating effect Effects 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model relates to the technical field of road engineering, in particular to an old cement pavement repairing structure which comprises an old concrete base layer, a control layer and an additional layer, wherein the old concrete base layer, the control layer and the additional layer are arranged from bottom to top, and the control layer is provided with a stress absorbing layer, a geotechnical material interlayer and a crack relieving layer in sequence from bottom to top. According to the utility model, the control layer is arranged between the paving layer and the old concrete base layer, and the stress absorption layer is used for absorbing stress aiming at the reflection crack cause, the geotechnical material interlayer disperses stress, and the crack relieving layer is used for relieving the formation of the reflection crack in a mode of blocking temperature change.
Description
Technical Field
The utility model relates to the technical field of road engineering, in particular to an old cement pavement repairing structure.
Background
In the repairing measures of cement concrete roads, the addition of an asphalt layer is one of the main measures. However, when the asphalt layer is applied to the joints and gaps of old cement concrete pavement, the upper layer will have corresponding cracks in a short time, and these cracks are called reflective cracks.
The reflection crack causes two: firstly, the old pavement layer horizontally stretches and contracts caused by the change of the external environment temperature, secondly, when a vehicle runs to the joint surface, the additional pavement layer mainly bears bending and stretching stress, and when the vehicle runs to one side of a joint or a crack, the plate end can generate vertical displacement difference and can generate continuous bending, pulling and shearing effects on the additional pavement asphalt layer.
The reflection cracks can influence driving, potential safety hazards are buried, and the reflection cracks need to be repaired, so that the reflection crack problem is the most critical problem in old cement pavement asphalt paving.
Disclosure of Invention
In order to reduce the occurrence of reflection cracks in an old cement pavement repair layer and avoid repeated construction, the utility model provides an old cement pavement repair structure.
The utility model provides an old cement pavement repairing structure, which adopts the following technical scheme:
the utility model provides an old cement road surface restoration structure, includes old concrete basic unit, prevention and cure layer and adds the spreading layer, old concrete basic unit, prevention and cure layer and add the spreading layer from down up setting, prevention and cure layer is from down up arranging stress absorbing layer, geotechnique material intermediate layer, crack release layer in proper order.
By adopting the technical scheme, the reflection cracks are prevented and treated. Specifically, by arranging the control layer between the paving layer and the old concrete base layer, aiming at the reflection crack cause, the stress absorption layer absorbs stress, the geotechnical material interlayer disperses stress, and the crack release layer blocks temperature change, so that the formation of the reflection crack is slowed down.
The utility model is further provided with: the thickness of the stress absorbing layer is set to be 1-1.5 cm, the stress absorbing layer comprises rubber asphalt, and stones with single particle size are uniformly distributed in the rubber asphalt.
By adopting the technical scheme, the formation of the reflection cracks is delayed in a form of absorbing stress, so that the design purpose of reducing the reflection cracks is achieved. Specifically, the stress absorbing layer has good deformation resistance, and when facing the stress transmitted by the upper layer, the stress absorbing layer can form a buffer layer to absorb the stress, so that the influence of the movement of the upper vehicle on the original crack of the old concrete base layer is reduced.
The utility model is further provided with: the geotechnical material interlayer thickness is set to 0.8-1.5 cm, the geotechnical material interlayer comprises a glass fiber grid, a hexagonal grid is arranged on the glass fiber grid array, and tar sand is arranged in the grid and on the upper surface and the lower surface of the glass fiber grid.
By adopting the technical scheme, the formation of the reflection cracks is delayed in a form of dispersing stress, so that the design purpose of reducing the reflection cracks is achieved. Specifically, the glass fiber grating has good tensile capacity and thicker thickness, has obvious dispersion effect in the face of external force action caused by vehicle load, has hexagonal shape, has excellent mechanical property and can horizontally transfer the stress on the upper part.
The utility model is further provided with: the thickness of the crack relieving layer is set to be 8-12 cm, and the crack relieving layer comprises a large-particle-size asphalt mixture.
By adopting the technical scheme, the formation of the reflection cracks is delayed in a mode of isolating temperature change, so that the design purpose of reducing the reflection cracks is achieved. Specifically, the large-particle-size asphalt mixture crack relieving layer has a large number of large-particle-size mineral grains and large gaps, can effectively block and expand reflection cracks upwards. The thickness of the pavement can improve the temperature of the old cement concrete pavement, and the influence of temperature change on the paving layer is reduced.
The utility model is further provided with: the upper surface of the old concrete foundation layer is a rough surface, and the depth of the rough surface is 0.5-1 cm.
By adopting the technical scheme, the friction force between the old concrete base layer and the control layer is enhanced, the adhesion performance of the control layer is improved, and interlayer sliding is avoided, so that layer extrusion and layer stretching in the horizontal direction occur when a vehicle passes through, and finally, the situation of crack generation is caused.
The utility model is further provided with: the filling material is filled in the cracks on the old concrete base layer, tie bars are arranged on the cracks on the old concrete base layer, and the tie bars cross across two sides of the cracks.
By adopting the technical scheme, the further development and deterioration of the crack are delayed. Specifically, constructors expand and fill the cracks, firstly slightly expand the cracks, clean loose fragments at two sides of the cracks, enable firm bonding surfaces to be generated at two ends of the cracks, fill the filling materials into the cracks to bond the two sides of the cracks, prevent foreign matters and water from entering the cracks, and tie the tie bars to act on the concrete at two ends of the tie cracks, limit the movement of the concrete at two sides, and further avoid expansion of the cracks.
The utility model is further provided with: the paving layer comprises a fine particle type modified asphalt concrete layer and a middle particle type asphalt concrete layer, and the fine particle type modified asphalt concrete layer is positioned above the middle particle type asphalt concrete layer.
By adopting the technical scheme, the fine-grain modified asphalt concrete layer and the middle-grain asphalt concrete layer are an upper layer and a lower layer of the pavement repair structure, wherein the fine-grain modified asphalt concrete layer serving as the upper layer has the functions of wear resistance and skid resistance, and the middle-grain asphalt concrete layer serving as the lower layer has the functions of rutting resistance and shearing resistance.
By adopting the technical scheme, an adhesive layer is arranged between the fine particle type modified asphalt concrete layer and the middle particle type asphalt concrete layer.
By adopting the technical scheme, a reliable bonding layer is formed between the fine-grain modified asphalt concrete layer and the medium-grain asphalt concrete layer, so that the fine-grain modified asphalt concrete layer and the medium-grain asphalt concrete layer are combined into a whole, and rebound and cracking are prevented from occurring between the fine-grain modified asphalt concrete layer and the medium-grain asphalt concrete layer.
In summary, the utility model has the following beneficial technical effects:
by arranging the control layer between the additional layer and the old concrete base layer, aiming at the reflection crack cause, the stress absorption layer absorbs stress, the geotechnical material interlayer disperses stress, and the crack release layer blocks temperature change, so that the formation of the reflection crack is slowed down.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present utility model;
FIG. 2 is a schematic structural view of an old concrete foundation layer;
fig. 3 is a schematic structural view of a geotechnical material interlayer.
Reference numerals illustrate: 1. old concrete base layer; 11. a filler; 12. a tie bar; 13. a rough surface; 2. a control layer; 21. a stress absorbing layer; 22. an interlayer of geotechnical material; 221. a glass fiber grid; 2211. a grid; 222. tar sand; 23. a crack mitigating layer; 3. adding a layer; 31. a fine-grain modified asphalt concrete layer; 32. a medium-grain asphalt concrete layer; 33. and (5) an adhesive layer.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-3.
Examples:
referring to fig. 1 and 2, an old cement pavement repairing structure comprises an old concrete base layer 1, wherein the old concrete base layer 1 is an original cement concrete pavement, and the old concrete base layer 1 is used as a new pavement base layer in the repairing structure to play roles in bearing and transferring load. Before the concrete base layer is used as a base layer, the old concrete base layer 1 needs to be repaired, wherein cracks with larger widths are filled with the expanded cracks, loose fragments at two ends of the cracks are cleaned to form firm bonding surfaces, the cracks are filled with the mixture of modified emulsified asphalt, fine sand and broken stone as the filling material 11, and the development speed of the cracks is slowed down through the bonding surfaces at two sides of the drawknot cracks, so that the effect of preventing impurities from entering the cracks is achieved. After filling, tie bars 12 are arranged along the trend of the crack, the tie bars 12 cross the crack, two ends of the tie bars are implanted into the old concrete base layer 1 at two sides of the crack, and expansion of the crack is further limited.
Referring to fig. 1 and 2, after the old concrete base layer 1 is subjected to crack treatment, milling and roughening are performed on the top surface of the old concrete base layer, the depth of a rough surface 13 is 1cm, the contact surface with a subsequent surface layer is increased, the friction force and the adhesion force between the old concrete base layer and the subsequent surface layer are improved, and sliding between the surface layers is avoided, so that when a vehicle passes through, layer extrusion and layer stretching in the horizontal direction occur, and finally the internal stress of the layer is larger than the strength of the old concrete base layer, and the crack is generated.
Referring to fig. 1, a control layer 2 is paved on an old concrete base layer 1, the control layer 2 comprises a stress absorbing layer 21, the layer thickness is 1.5cm, the stress absorbing layer 21 has various forms, such as rubber asphalt, modified asphalt waterproof felt, soft asphalt concrete and the like, the stress absorbing layer 21 in the embodiment is rubber asphalt, the rubber asphalt is sprayed on the old concrete base layer 1 in construction, then stones with single particle size are uniformly paved, the pavement is flattened by a road roller, the stones are embedded in the rubber asphalt, the integrity is enhanced, the stress absorbing layer 21 has better viscosity for the upper layer and the lower layer, and because the stress absorbing layer has stronger deformation resistance, a buffer layer can be formed when facing the stress transmitted by the upper layer, the stress is absorbed, the influence of the upper vehicle activity on the original crack of the old concrete base layer 1 is reduced, and the generation of reflection crack is reduced.
Referring to fig. 1 and 3, the stress absorbing layer 21 is paved with a geotechnical material interlayer 22, the layer thickness is 1.5cm, the geotechnical material of the geotechnical material interlayer 22 can be geotechnical cloth, geotechnical grids, geotechnical nets and the like, in the embodiment, the geotechnical material is glass fiber grids 221, and grids 2211 of the glass fiber grids 221 are hexagonal grids 2211 uniformly distributed in an array, so that the crack stress and the tensile stress caused by load can be effectively dispersed, the tensile strength of the paved asphalt layer is indirectly enhanced, and the occurrence of crack opening deformation conditions is relieved; the grid 2211 is filled with the tar sand 222, and the tar sand 222 is also distributed on the upper surface and the lower surface of the glass fiber grid 221, so that the geotechnical material interlayer 22 is integrated, the upper load can be transferred to the lower part, and the bearing load of the cracks of the old concrete foundation layer 1 is dispersed, thereby reducing deflection and reducing the shear stress of the load on the cracks.
Referring to fig. 1, a crack mitigating layer 23 is laid on the geotechnical interlayer 22, the layer thickness is 12cm, and in this embodiment, the crack mitigating layer 23 is made of a large-particle-size asphalt mixture. The large-particle-size asphalt mixture has the characteristics of large particles, large gaps and small asphalt content, can block the extension path of the crack tip to a certain extent, weaken tensile stress and simultaneously can dissipate and absorb stress caused by the running of vehicles. In addition, the large-particle-size asphalt mixture crack relieving layer 23 has stronger deformability, can fully utilize the strain capacity generated at the crack, and reduce the stress action at the crack, so that the expansion speed of the reflective crack to the asphalt layer is slowed down, and secondly, the main reason for causing the reflective crack is caused by the change of the external environment temperature. Because the thickness of the large-particle-size asphalt mixture crack relieving layer 23 is thicker, the relieving layer with a certain thickness can improve the temperature of the old concrete base layer 1, and the influence of temperature change on the subsequent surface layers is reduced.
Referring to fig. 1, a paving layer 3 is paved on the crack relieving layer 23, and the paving layer 3 comprises a fine particle type modified asphalt concrete layer 31 and a middle particle type asphalt concrete layer 32. The fine particle modified asphalt concrete layer 31 serves as an upper layer, has functions of wear resistance and skid resistance, can effectively prevent pavement from cracking and deforming, and prolongs the service life of the road. The medium-grain asphalt concrete layer 32 is used as a lower layer, has higher strength and stability, and bears the functions of rutting resistance and shearing resistance. An adhesive layer 33 is paved between the fine particle type modified asphalt concrete layer 31 and the middle particle type asphalt concrete layer 32, and the adhesive layer 33 is used for bonding the upper surface layer and the lower surface layer, so that gaps are avoided, the two surface layers are integrated, and the durability and the service life of a road structure are improved.
The working principle of the old cement pavement repair structure is as follows: by arranging the control layer 2 between the additional layer 3 and the old concrete base layer 1, the stress is absorbed by the stress absorbing layer 21, the stress is dispersed by the geotechnical material interlayer 22, and the crack relieving layer 23 blocks the temperature change, so that the formation of reflection cracks is reduced.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (8)
1. The utility model provides a old cement road surface restoration structure which characterized in that: the novel concrete composite floor comprises an old concrete base layer (1), a control layer (2) and an additional layer (3), wherein the old concrete base layer (1), the control layer (2) and the additional layer (3) are arranged from bottom to top, and the control layer (2) is provided with a stress absorbing layer (21), a geotechnical material interlayer (22) and a crack relieving layer (23) from bottom to top in sequence.
2. The old cement pavement restoration structure according to claim 1, wherein: the thickness of the stress absorbing layer (21) is set to be 1-1.5 cm, the stress absorbing layer (21) comprises rubber asphalt, and stones with single particle sizes are uniformly distributed in the rubber asphalt.
3. The old cement pavement restoration structure according to claim 1, wherein: the thickness of the geotechnical material interlayer (22) is set to be 0.8-1.5 cm, the geotechnical material interlayer (22) comprises glass fiber grids (221), hexagonal grids (2211) are arranged on the glass fiber grids (221) in an array mode, and asphalt sand (222) is arranged in the grids (2211) and on the upper surface and the lower surface of the glass fiber grids (221).
4. The old cement pavement restoration structure according to claim 1, wherein: the thickness of the crack relieving layer (23) is set to be 8-12 cm, and the crack relieving layer (23) comprises a large-particle-size asphalt mixture.
5. The old cement pavement restoration structure according to claim 1, wherein: the upper surface of the old concrete foundation layer (1) is a rough surface (13), and the depth of the rough surface (13) is 0.5-1 cm.
6. The old cement pavement restoration structure according to claim 1, wherein: the novel concrete foundation slab is characterized in that filling materials (11) are filled in cracks on the old concrete foundation slab (1), tie bars (12) are arranged on the cracks on the old concrete foundation slab (1), and the tie bars (12) cross two sides of the cracks.
7. The old cement pavement restoration structure according to claim 1, wherein: the paving layer (3) comprises a fine particle type modified asphalt concrete layer (31) and a middle particle type asphalt concrete layer (32), and the fine particle type modified asphalt concrete layer (31) is positioned above the middle particle type asphalt concrete layer (32).
8. The old cement pavement restoration structure according to claim 7, wherein: an adhesive layer (33) is arranged between the fine particle type modified asphalt concrete layer (31) and the middle particle type asphalt concrete layer (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321574070.9U CN219930608U (en) | 2023-06-19 | 2023-06-19 | Old cement pavement repair structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321574070.9U CN219930608U (en) | 2023-06-19 | 2023-06-19 | Old cement pavement repair structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219930608U true CN219930608U (en) | 2023-10-31 |
Family
ID=88497440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321574070.9U Active CN219930608U (en) | 2023-06-19 | 2023-06-19 | Old cement pavement repair structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219930608U (en) |
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2023
- 2023-06-19 CN CN202321574070.9U patent/CN219930608U/en active Active
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