White-to-black pavement repairing structure for high-performance heavy-duty highway
By setting up a stress-absorbing layer and a high-performance asphalt surface layer on the old cement concrete pavement, combined with drainage ditches, the problem of crack reflection in the old cement concrete pavement was solved, the pavement's durability and driving comfort were improved, costs were reduced, water stability was enhanced, and the optimization and transformation of the old cement concrete pavement was achieved.
Patent Information
- Application Number
- CN202423043398.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Traditional cement concrete pavements lack durability under heavy traffic conditions, and traditional "white-to-black" conversion technology has problems such as high cost and complex construction in improving pavement performance.
The structure employs a combination of stress-absorbing layer and high-performance asphalt pavement, including geotextile, water, air, rubber asphalt, asphalt pavement, soil, geotextile, soil, soil, soil, soil, geotextile, geotextile, geotextile, geotextile, stress-absorbing layer, combined with drainage ditch. The stress-absorbing layer transfers and reflects crack stress, improving pavement durability and skid resistance, while the high-performance asphalt pavement improves bearing capacity and shear resistance, and the drainage ditch enhances water stability.
It effectively solved the problem of crack reflection in old cement concrete pavement, improved pavement durability and driving comfort, reduced costs, enhanced pavement water stability, and achieved the optimization and transformation of old cement concrete pavement.
Smart Images
Figure CN223633737U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of highway pavement repair, in particular to a high-performance heavy-load highway "white-to-black" pavement repair structure. BACKGROUND
[0002] With the rapid economic development and sharp increase in traffic volume, especially the large number of heavy-load vehicles, the original cement concrete pavement gradually appears damaged, such as cracks, alligatoring and rutting, which seriously affects the service performance and driving safety of the pavement.
[0003] The traditional cement concrete pavement repair method has problems such as complex construction, high cost, limited pavement performance improvement after repair and the like, and the "white-to-black" technology, that is, adding an asphalt layer on the old cement concrete pavement, is gradually widely applied due to the advantages of simple construction, low cost and small influence on the traffic environment, however, how to ensure the performance of the "white-to-black" pavement repair structure, especially the durability under heavy-load traffic, is still a technical problem to be solved at present, in order to solve the above problems, the application provides a high-performance heavy-load highway "white-to-black" pavement repair structure. CONTENT OF THE INVENTION
[0004] In view of the defects in the prior art, the application provides a high-performance heavy-load highway "white-to-black" pavement repair structure, which can be used for the reconstruction of the damaged cement concrete pavement to improve the pavement performance and prolong the service life, and is suitable for highways with heavy-load traffic.
[0005] To achieve the above object, the application provides the following technical scheme: a high-performance heavy-load highway "white-to-black" pavement repair structure, comprising an old cement concrete pavement and a drainage ditch, the upper surface of the old cement concrete pavement is paved with a stress absorption layer, the stress absorption layer comprises geotextile fixedly connected to the upper surface of the old cement concrete pavement, the upper surface of the geotextile is provided with rubber asphalt, the rubber asphalt is internally filled with uniformly distributed asphalt macadam, the upper surface of the rubber asphalt is paved with a high-performance asphalt surface layer, and the stress absorption layer is located between the old cement concrete pavement and the high-performance asphalt surface layer.
[0006] Through the stress absorption layer, the crack reflection problem of the old cement concrete pavement can be effectively solved, the high-performance asphalt surface layer is adopted to improve the durability and driving comfort of the pavement, the stress absorption layer and the high-performance asphalt surface layer cooperate with each other to solve the problem that the cost is greatly increased and the economic requirement cannot be met by simply increasing the thickness of the stress absorption layer, and the drainage ditch can further enhance the water stability of the pavement and optimize the reconstruction of the old cement concrete pavement.
[0007] Further, the upper surface of the geotextile is provided with a geogrid, which is located between the geotextile and the rubber asphalt.
[0008] Through the above scheme, the geotextile and the geogrid cooperate with each other, which can further improve the tensile strength and stress dispersion capacity.
[0009] Further, the high-performance asphalt surface layer comprises high-viscosity asphalt mixture located at the bottom layer, and the bottom surface of the high-viscosity asphalt mixture is fixedly connected with the upper surface of the rubber asphalt.
[0010] Through the above scheme, the load-bearing capacity and shear resistance of the structure can be improved by setting the high-viscosity asphalt mixture.
[0011] Further, the upper surface of the high-viscosity asphalt mixture is provided with stone-stable gap mixture.
[0012] Through the above scheme, the fatigue resistance and anti-rutting performance of the structure can be enhanced by setting the stone-stable gap mixture.
[0013] Further, the upper surface of the stone-stable gap mixture is paved with open-graded asphalt concrete, and the stone-stable gap mixture is located between the high-viscosity asphalt mixture and the open-graded asphalt concrete.
[0014] Through the above scheme, the drainage and anti-skid performance of the structure can be improved by setting the open-graded asphalt concrete.
[0015] Further, the overall thickness of the stress absorption layer is 1-4 cm.
[0016] Through the above scheme, by limiting the thickness of the stress absorption layer, the functional effect thereof can be optimized, the overall performance of the pavement structure can be ensured, and the balance between economy and construction controllability can be achieved.
[0017] Further, the overall thickness of the high-performance asphalt surface layer is 2-6 cm.
[0018] Through the above scheme, by limiting the overall thickness of the high-performance asphalt surface layer, more stable load-bearing effect can be achieved, and the service life of the structure can be prolonged.
[0019] Further, the drainage ditch is arranged on both sides of the old cement concrete pavement, the stress absorption layer and the high-performance asphalt surface layer.
[0020] Through the above scheme, by limiting the position of the drainage ditch, surface water can be quickly drained, and the water stability of the pavement is further enhanced.
[0021] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:
[0022] The high-performance heavy-load highway "white-to-black" pavement repairing structure effectively solves the problem of crack reflection of the old cement concrete pavement by laying the stress absorbing layer, significantly improves the durability and driving comfort of the pavement by adopting the high-performance asphalt surface layer, and balances the economy by avoiding the cost increase caused by the increase of the thickness of the stress absorbing layer while ensuring the performance, in addition, by reasonably setting the drainage ditch, not only the water stability of the pavement is enhanced, but also the overall pavement reconstruction effect is further improved, and the optimized reconstruction of the old cement concrete pavement is realized. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is a whole structure schematic diagram of the structure of the present application;
[0024] Figure 2 It is a top view structure schematic diagram of the structure of the present application;
[0025] Figure 3 It is a whole structure schematic diagram of the structure of the present application;
[0026] Figure 4 It is a whole structure schematic diagram of the structure of the present application.
[0027] In the figure:
[0028] 1, old cement concrete pavement; 2, stress absorbing layer; 201, geotextile; 202, geogrid; 203, rubber asphalt; 204, asphalt macadam; 3, high-performance asphalt surface layer; 301, high-viscosity asphalt mixture; 302, stone stable gap mixture; 303, open-graded asphalt concrete; 4, drainage ditch. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0030] Please refer to Figure 1 , Figure 2 and Figure 3The high-performance heavy-load highway "white-to-black" pavement repairing structure in the embodiment comprises an old cement concrete pavement 1 and a drainage ditch 4, and a stress absorbing layer 2 is laid on the upper surface of the old cement concrete pavement 1. The stress absorbing layer 2 can reduce the interlayer bonding force, convert the reflected crack stress from the vertical direction to the horizontal direction, avoid stress concentration, and play a role in crack alleviation and prevention. The stress absorbing layer 2 comprises geotextile 201 fixedly connected to the upper surface of the old cement concrete pavement 1, rubber asphalt 203 arranged on the upper surface of the geotextile 201, and geogrid 202 arranged on the upper surface of the geotextile 201 and located between the geotextile 201 and the rubber asphalt 203. The geotextile 201 and the geogrid 202 cooperate with each other to further improve the tensile strength and stress dispersion capacity. The rubber asphalt 203 is filled with uniformly distributed asphalt macadam 204. The filling of the asphalt macadam 204 in the rubber asphalt 203 can effectively improve the durability and fatigue resistance of the stress absorbing layer 2. A high-performance asphalt surface layer 3 is laid on the upper surface of the rubber asphalt 203. The stress absorbing layer 2 is located between the old cement concrete pavement 1 and the high-performance asphalt surface layer 3. The high-performance asphalt surface layer 3 is formed by paving high-performance asphalt mixture and is a flat and rough surface layer, which can improve the skid resistance and driving safety of the pavement.
[0031] It should be noted that, before construction, the cracks, subsidence or loose areas of the old cement concrete pavement 1 should be checked, and high-strength repairing mortar or fast-hardening materials should be used for repairing to ensure the stability of the overall base. The expansion joints of the old cement concrete pavement 1 should be cleaned and filled, and flexible joint materials such as polyurethane or modified asphalt sealant should be used. If there is a dislocation phenomenon between the slabs, milling or local leveling treatment should be performed. Then, the surface of the old cement concrete pavement 1 should be finely milled to remove the surface float and improve the adhesion of the base. The stress absorbing layer 2 and the high-performance asphalt surface layer 3 should be ensured to be compacted during paving.
[0032] Please refer to Figure 1 , Figure 2 and Figure 4 . The high-performance asphalt surface layer 3 comprises high-viscosity asphalt mixture 301 located at the bottom. The bottom surface of the high-viscosity asphalt mixture 301 is fixedly connected to the upper surface of the rubber asphalt 203. The high-viscosity asphalt mixture 301 can improve the bearing capacity and shear resistance of the structure. The upper surface of the high-viscosity asphalt mixture 301 is provided with stone stable gap mixture 302. The stone stable gap mixture 302 can enhance the fatigue resistance and anti-rutting performance of the structure. The upper surface of the stone stable gap mixture 302 is paved with open-graded asphalt concrete 303. The stone stable gap mixture 302 is located between the high-viscosity asphalt mixture 301 and the open-graded asphalt concrete 303. The open-graded asphalt concrete 303 can improve the drainage and skid resistance of the structure.
[0033] Please refer to Figure 1 , Figure 2 and Figure 3 , the overall thickness of the stress absorbing layer 2 is 1-4 cm, by limiting the thickness of the stress absorbing layer 2, the functional effect can be optimized and the overall performance of the pavement structure can be ensured, and the balance of economy and construction controllability is achieved, if the stress absorbing layer 2 is too thin, it is difficult to effectively alleviate the stress concentration generated by the old cement concrete pavement 1, which may cause the rapid development of reflective cracks, and if it is too thick, it may cause uneven dispersion of stress concentration, which may in turn cause new structural problems, such as local uneven settlement, therefore, limiting the thickness of the stress absorbing layer 2 can make the stress absorbing layer absorb stress while maintaining uniformity, reduce interlayer slip and fatigue damage, the overall thickness of the high-performance asphalt surface layer 3 is 2-6 cm, by limiting the overall thickness of the high-performance asphalt surface layer 3, more stable bearing effect can be achieved, and the service life of the structure can be prolonged, if the thickness of the high-performance asphalt surface layer 3 is too thin, it may not be able to effectively resist traffic load and environmental stress, resulting in early rutting, cracking or peeling, etc. If the thickness of the high-performance asphalt surface layer 3 is too large, it may cause material waste, and even hidden weaknesses due to insufficient internal material density, reducing the overall pavement life, limiting the thickness can make the high-performance asphalt surface layer 3 achieve the best balance between compressive strength, fatigue resistance and durability, and ensure that the pavement maintains stable service performance within the designed service life, the drainage ditch 4 is arranged on both sides of the old cement concrete pavement 1, the stress absorbing layer 2 and the high-performance asphalt surface layer 3, by limiting the position of the drainage ditch 4, surface water can be quickly removed, further enhancing the water stability of the pavement.
[0034] In this embodiment, a high-performance heavy-load highway "white-to-black" pavement repair structure, through the laying of the stress absorbing layer 2, can effectively solve the problem of crack reflection of the old cement concrete pavement 1, and at the same time, the high-performance asphalt surface layer 3 is adopted to improve the durability and driving comfort of the pavement, the stress absorbing layer 2 and the high-performance asphalt surface layer 3 cooperate with each other to solve the problem that simply increasing the thickness of the stress absorbing layer 2 will greatly increase the cost and cannot meet the requirements in terms of economy, and through the setting of the drainage ditch 4, the water stability of the pavement can be further enhanced, and the old cement concrete pavement 1 can be optimized and modified.
[0035] The working principle of the above embodiment is that: firstly, the surface condition of the old cement concrete pavement 1 is checked, then the surface of the old cement concrete pavement 1 is thoroughly cleaned, cracks and pits are repaired, and the base layer is ensured to be flat and free of sundries, then the geotextile 201 and the geogrid 202 are laid on the surface of the old cement concrete pavement 1, then the rubber asphalt 203 and the asphalt macadam 204 are laid on the surface of the old cement concrete pavement 1, to form the stress absorbing layer 2, through the stress absorbing layer 2, the interlayer bonding force can be reduced, the reflected crack stress can be converted from the vertical direction to the horizontal direction, stress concentration can be avoided, and the effects of crack alleviation and crack prevention can be achieved, then the high-performance asphalt surface layer 3 is laid on the surface of the stress absorbing layer 2, through the high-performance asphalt surface layer 3, the skid resistance and driving safety of the road surface can be improved, finally, through the drainage ditch 4, rainwater can be ensured to be discharged in time, water in the roadbed can be prevented, and the water stability of the road surface can be improved.
[0036] It should be noted that, in this document, the terms "first" and "second" and the like are used merely to distinguish one entity or action from another, and do not necessarily require or imply any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof are used in this document to encompass non-exclusive inclusions, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.
[0037] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A high-performance heavy-duty highway "white-to-black" pavement repair structure, comprising old cement concrete pavement (1) and drainage ditch (4), characterized in that: The upper surface of the old cement concrete pavement (1) is covered with a stress-absorbing layer (2). The stress-absorbing layer (2) includes a geotextile (201) fixedly connected to the upper surface of the old cement concrete pavement (1). The upper surface of the geotextile (201) is covered with rubber asphalt (203). The interior of the rubber asphalt (203) is filled with uniformly distributed asphalt gravel (204). The upper surface of the rubber asphalt (203) is covered with a high-performance asphalt surface layer (3). The stress-absorbing layer (2) is located between the old cement concrete pavement (1) and the high-performance asphalt surface layer (3).
2. The high-performance heavy-duty highway "white-to-black" pavement repair structure according to claim 1, characterized in that: A geogrid (202) is installed on the upper surface of the geotextile (201), and the geogrid (202) is located between the geotextile (201) and the rubber asphalt (203).
3. The high-performance heavy-duty highway "white-to-black" pavement repair structure according to claim 1, characterized in that: The high-performance asphalt surface layer (3) includes a high-viscosity asphalt mixture (301) located at the bottom layer, and the bottom surface of the high-viscosity asphalt mixture (301) is fixedly connected to the upper surface of the rubber asphalt (203).
4. The high-performance heavy-duty highway "white-to-black" pavement repair structure according to claim 3, characterized in that: The upper surface of the high-viscosity asphalt mixture (301) is provided with aggregate-stabilized interstitial mixture (302).
5. A high-performance heavy-duty highway "white-to-black" pavement repair structure according to claim 4, characterized in that: The upper surface of the aggregate stabilized interstitial mixture (302) is covered with open-graded asphalt concrete (303), and the aggregate stabilized interstitial mixture (302) is located between the high-viscosity asphalt mixture (301) and the open-graded asphalt concrete (303).
6. The high-performance heavy-duty highway "white-to-black" pavement repair structure according to claim 1, characterized in that: The overall thickness of the stress-absorbing layer (2) is 1 to 4 cm.
7. The high-performance heavy-duty highway "white-to-black" pavement repair structure according to claim 1, characterized in that: The overall thickness of the high-performance asphalt surface layer (3) is 2 to 6 cm.
8. The high-performance heavy-duty highway "white-to-black" pavement repair structure according to claim 1, characterized in that: The drainage ditch (4) is set on both sides of the old cement concrete pavement (1), stress-absorbing layer (2) and high-performance asphalt surface layer (3).