High-low standard asphalt combined surface layer structure
By adopting a high-low standard asphalt combined surface structure and an optimized drainage and water replenishment mechanism in the pavement structure, the problem of ruts and cracks on traditional pavement is solved, and the rut resistance and durability of the pavement are significantly improved.
Patent Information
- Application Number
- CN202510445306.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2025-06-20
AI Technical Summary
Traditional asphalt surface structures are prone to ruts, cracks and other diseases under the influence of vehicle loads and climatic conditions, which affect the service life of the road and driving comfort.
The high-low standard asphalt combined surface layer structure is adopted, including low-label layer, middle-label layer and high-label layer. The high-label layer adopts high-label asphalt, the middle-label layer adopts high-label asphalt, the low-label layer adopts low-label asphalt, and the low-label layer adopts low-label asphalt, and a drainage tank and anti-seepage mechanism are set on the concrete layer, combining the water replenishment mechanism to optimize the mechanical properties of the pavement structure.
It significantly improves the rut resistance of the road surface, reduces deformation under high temperature conditions, extends the service life of the road surface, reduces construction costs, and prevents dry shrinkage and cracking of the concrete layer by optimizing the drainage and water replenishment mechanism.
Smart Images
Figure CN120174685A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of road engineering, and particularly to a high-low grade asphalt combined surface layer structure. Background Art
[0002] Traditional road surfaces usually consist of a subgrade (mud layer), a gravel layer, a concrete layer, and an upper asphalt layer from bottom to top. However, the asphalt surface structure usually uses a single grade of asphalt material. In actual use, due to the influence of factors such as vehicle load and climate conditions, diseases such as ruts and cracks are likely to occur, affecting the service life of the road surface and driving comfort.
[0003] The selection of asphalt grade usually becomes a key factor affecting the road surface life. High-grade asphalt usually refers to asphalt with grades of 110, 130, and 160. Its characteristic is that the low-temperature performance of high-grade asphalt mixture is more excellent, but the high-temperature performance and water stability performance are slightly worse. Therefore, it is more commonly used in cold regions; low-grade asphalt usually includes asphalt with grades of 20, 30, and 50. Its characteristic is that the high-temperature performance is more excellent while the low-temperature crack resistance performance is poor.
[0004] Therefore, how to make full use of the performance of different grade asphalt materials in design according to the respective advantages and disadvantages of high-low grade asphalt materials has become the primary problem to be solved in this case.
[0005] Another factor causing road surface cracking is the concrete layer. Since the temperature of the asphalt road surface can reach 70°C in summer, the large day-night temperature difference is likely to cause cracks in the concrete layer. At the same time, due to the high temperature, the high temperature will accelerate the evaporation of moisture inside the concrete, and finally cause the concrete layer to dry shrink and crack to form cracks. The concrete layer will conduct the cracks to the asphalt layer, resulting in the cracking of the asphalt surface layer. Summary of the Invention
[0006] (1) Technical Problems to be Solved
[0007] Aiming at the deficiencies of the prior art, the present invention provides a high-low grade asphalt combined surface layer structure, which solves the problems raised in the above background art.
[0008] (2) Technical Solutions
[0009] To achieve the above object, the present invention is realized through the following technical solutions: A high-low grade asphalt combined surface layer structure, including a mud layer roadbed, a gravel layer, a concrete layer, and an asphalt layer arranged in sequence from bottom to top. The asphalt layer includes a low-grade layer, a medium-grade layer, and a high-grade layer arranged in sequence from bottom to top. The high-grade layer uses high-grade asphalt, the medium-grade layer uses medium-grade asphalt, and the low-grade layer uses low-grade asphalt. Drainage grooves are equidistantly arranged along the length direction of the concrete layer. The top of the drainage groove is covered with a water tank support surface. An anti-seepage mechanism is arranged on the water tank support surface. The anti-seepage mechanism includes a plurality of drain pipes, a transverse pipe, a support block, and a water blocking component. A plurality of drain pipes are vertically arranged on the water tank support surface, and the lower part penetrates into the drainage groove. The transverse pipe is horizontally arranged in the concrete layer and is horizontally penetrated with the drain pipes. The water blocking component is arranged in the transverse pipe and can block the drain pipes. The support block is arranged on the top of the drain pipe, and the support block is made of a water-degradable material.
[0010] Preferably, the support block is composed of 40-60% degradable polymer, 20-30% natural fiber, 10-20% inorganic filler, 5-10% cross-linking agent, and 5-10% degradation promoter.
[0011] Preferably, each transverse pipe corresponds to two groups of drain pipes. Each group of drain pipes can be multiple. The two groups of drain pipes are respectively arranged on two adjacent drainage grooves, and the two groups of drain pipes are respectively vertically penetrated with both ends of the transverse pipe.
[0012] Preferably, the water blocking component includes two piston sliders and a control mechanism. The two piston sliders are slidably fitted in the transverse pipe and can respectively block the two groups of corresponding drain pipes. The control mechanism is used to simultaneously control the two piston sliders to move in opposite or opposite directions.
[0013] Preferably, the control mechanism includes an airbag, a fixing body, two springs, an inflation main pipe, and an air pump. The middle part of the airbag is fixed in the middle of the transverse pipe through the fixing body. The two piston sliders are respectively connected to the fixing body through springs and are sleeved outside the airbag. The inlet end of the inflation main pipe is connected to the air pump, and the outlet end is connected to the middle part of the airbag through a branch pipe.
[0014] Preferably, the outer shape of the airbag when not inflated is a wave tooth shape extending along its length direction.
[0015] Preferably, the top of the drain pipe is flush with the water tank support surface. A limiting ring for supporting the support block is arranged in the drain pipe, and the top surface of the support block is flush with the top inlet of the drain pipe.
[0016] Preferably, deformation grooves are arranged in a crisscross pattern on the top of the concrete layer.
[0017] Preferably, it further includes a water replenishing mechanism, which includes a water replenishing pipe and a water pump. The water replenishing pipe is arranged along the length direction of the top of the concrete layer. Water outlet pipes are arranged on both sides of the water replenishing pipe. The water outlet pipes are parallel to the top surface of the concrete layer. The water pump is connected to the water inlet end of the water replenishing pipe.
[0018] Preferably, the thickness of the high-strength layer is 8 - 10 cm, the thickness of the medium-strength layer is 6 - 8 cm, and the thickness of the low-strength layer is 4 - 6 cm.
[0019] (III) Beneficial effects
[0020] The present invention provides a high-low grade asphalt combined surface layer structure, which has the following beneficial effects:
[0021] 1. In this high-low grade asphalt combined surface layer structure, through the setting of the high-strength asphalt high-strength layer, the rutting resistance of the road surface is significantly improved, and the deformation under high-temperature conditions is reduced. The combination of the medium-strength asphalt medium-strength layer and the low-strength asphalt low-strength layer can effectively disperse the load, reduce the generation of cracks, and extend the service life of the road surface. By reasonably combining asphalt materials with different grades, the mechanical properties of the road surface structure are optimized, the rutting resistance and durability of the road surface are improved, and the construction cost is reduced at the same time.
[0022] 2. In this high-low grade asphalt combined surface layer structure, by setting support blocks made of degradable materials, the support blocks have sufficient bearing capacity during the early asphalt pouring period, preventing asphalt from penetrating into the drain pipe during pouring. After pouring, since the support blocks will gradually decompose when they encounter water, they will gradually decompose under the action of rainwater or artificial water, enabling the drain pipe to have a smooth water seepage and drainage function.
[0023] 3. In this high-low grade asphalt combined surface layer structure, when the temperature of the asphalt layer reaches a relatively high level in summer, water can be sprayed through the water replenishing mechanism. The replenished water will accumulate in the deformation grooves and be stored for a period of time. The water in the crisscross deformation grooves can timely replenish water to the concrete layer, effectively reduce the temperature of the concrete layer, prevent it from rapidly evaporating a large amount of water due to high temperature, prevent it from drying and cracking, and also avoid cracking caused by large temperature differences. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is the overall axonometric view of the present invention;
[0025] Figure 2 is the axonometric structural schematic diagram of the concrete layer of the present invention;
[0026] Figure 3 is the overall side sectional view of the present invention;
[0027] Figure 4 is the structural schematic diagram of the control mechanism of the present invention;
[0028] Figure 5 This is the fully deployed state diagram of the airbag of the present invention.
[0029] In the figure: 1 Mud layer roadbed, 2 Gravel layer, 3 Concrete layer, 31 Drainage groove, 32 Water tank support surface, 33 Deformation groove, 4 Asphalt layer, 41 High-grade layer, 42 Medium-grade layer, 43 Low-grade layer, 5 Anti-seepage mechanism, 51 Drain pipe, 52 Horizontal pipe, 53 Support block, 54 Piston slider, 55 Limit ring, 6 Control mechanism, 61 Airbag, 62 Fixed body, 63 Spring, 64 Inflation main pipe, 65 Branch pipe, 66 Air pump, 7 Make-up water pipe, 8 Outlet pipe, 9 Water pump. Specific implementation mode
[0030] An embodiment of the present invention provides a high-low grade asphalt combined surface layer structure, as Figures 1-5 shown, including a mud layer roadbed 1, a gravel layer 2, a concrete layer 3, and an asphalt layer 4 arranged in sequence from bottom to top. The above is the conventional layout method of the existing road surface structure.
[0031] The asphalt layer 4 includes a low-grade layer 41, a medium-grade layer 42, and a high-grade layer 43 arranged in sequence from bottom to top. The high-grade layer 43 uses high-grade asphalt of SBS modified asphalt, and the thickness of the high-grade layer 43 is 8-10 cm. The high-grade asphalt has a relatively high softening point and anti-deformation ability, and can effectively resist the generation of ruts and cracks. The medium-grade layer 42 uses 70# medium-grade asphalt, and the thickness of the medium-grade layer 42 is 6-8 cm. The medium-low grade asphalt has good flexibility and anti-fatigue performance, and can disperse the load transmitted from the upper layer and reduce stress concentration. The low-grade layer 41 uses 50# low-grade asphalt, and the thickness of the low-grade layer 41 is 4-6 cm. The low-grade asphalt has relatively high adhesion and anti-shear ability, and can enhance the overall stability of the road surface structure.
[0032] Through the setting of the high-grade layer 43 of high-grade asphalt, the rutting resistance of the road surface is significantly improved, and the deformation under high-temperature conditions is reduced. The combination of the medium-grade layer 42 of medium-low grade asphalt and the low-grade layer 41 of low-grade asphalt can effectively disperse the load, reduce the generation of cracks, and extend the service life of the road surface. By reasonably combining asphalt materials of different grades, the mechanical properties of the road surface structure are optimized, the rutting resistance and durability of the road surface are improved, and the construction cost is reduced at the same time.
[0033] As Figure 2 shown, drainage grooves 31 are arranged equidistantly along the length direction of the concrete layer 3. The top of the drainage groove 31 is covered with a water tank support surface 32. The material of the water tank support surface 32 is the same as that of the concrete layer 3 and is integrally cast. The structure of the drainage groove 31 is formed by a formwork. Reinforcement bars can be arranged in the water tank support surface 32 to increase the structural strength of the water tank support surface 32.
[0034] The arrangement of the drainage groove 31 can, on the one hand, provide timely drainage for the road surface and, at the same time, reduce the risk of the concrete layer 3 cracking along the length direction of the drainage groove 31.
[0035] An anti-seepage mechanism 5 is arranged on the water tank support surface 32. The anti-seepage mechanism 5 includes a plurality of drain pipes 51, a transverse pipe 52, a support block 53 and a water-blocking component. The plurality of drain pipes 51 are vertically arranged on the water tank support surface 32, and the lower part penetrates into the drainage groove 31, and the top of the drain pipe 51 is flush with the water tank support surface 32.
[0036] In order to prevent the asphalt layer 4 from entering the drain pipe 51 during pouring and causing blockage to affect the drainage effect, the support block 53 is arranged on the top of the drain pipe 51, and the support block 53 is made of a water-degradable material.
[0037] The support block 53 is composed of 40 - 60% of a degradable polymer, 20 - 30% of natural fiber, 10 - 20% of inorganic filler, 5 - 10% of cross-linking agent, and 5 - 10% of degradation promoter. The degradable polymer serves as the matrix material to provide the degradable property of the material, and polylactic acid PLA or polycaprolactone PCL can be used. The natural fiber serves as the reinforcing material to improve the bearing capacity and tensile strength of the material, and bamboo fiber, hemp fiber or coconut shell fiber can be used. The inorganic filler is used to adjust the hardness and degradation rate of the material, and calcium carbonate, silicate or bentonite can be used. The cross-linking agent is used to enhance the durability and bearing capacity of the material, and epoxy resin or polyurethane can be used. The degradation promoter is used to accelerate the decomposition of the material under the action of rainwater, and starch or cellulose derivative can be used.
[0038] When preparing the support block 53, first mix the degradable polymer, natural fiber and inorganic filler in proportion and heat to the molten state. Then add the cross-linking agent and degradation promoter and stir evenly. Inject the mixture into the mold for preparing the support block 53, press into shape, and obtain the support block 53 after cooling.
[0039] Through reasonable material ratio and structural design, the support block 53 has sufficient bearing capacity during the early asphalt pouring period to prevent the asphalt from penetrating into the drain pipe 51 during pouring. After pouring, since the support block 53 will gradually decompose when it meets water, it will gradually decompose under the action of rainwater or artificial water. The support block 53 will form a honeycomb structure in the early stage and have a certain water seepage function, and will be slowly completely decomposed in the later stage, so that the drain pipe 51 has a smooth water seepage and drainage function.
[0040] As Figure 4 shown, a limiting ring 55 for supporting the support block 53 is arranged in the drain pipe 51, and the top surface of the support block 53 is flush with the top inlet of the drain pipe 51.
[0041] As Figure 4As shown, the transverse pipe 52 is arranged horizontally in the concrete layer 3 and is horizontally connected with the drainage pipe 51. The transverse pipe 52 is set in the concrete layer 3 in a pre-buried manner. The diameter of the transverse pipe 52 is larger than the diameter of the drainage pipe 51. The water blocking component is set in the transverse pipe 52 and can block the drainage pipe 51.
[0042] like Figure 4 As shown, each transverse pipe 52 corresponds to two groups of drainage pipes 51, and each group of drainage pipes 51 can be multiple, and the two groups of drainage pipes 51 are respectively arranged on two adjacent drainage grooves 31, and the two groups of drainage pipes 51 are respectively vertically connected with both ends of the transverse pipe 52. The drainage pipe 51 extends to the bottom of the transverse pipe 52, and the two ends of the transverse pipe 52 are closed.
[0043] The cross-section of the transverse tube 52 is circular or rectangular. The water blocking assembly includes two piston sliders 54 and a control mechanism 6. The two piston sliders 54 are piston-slidably adapted in the transverse tube 52 and can respectively block two groups of corresponding drainage pipes 51. The control mechanism 6 is used to simultaneously control the two piston sliders 54 to move in opposite or opposite directions.
[0044] like Figures 4-5 As shown in FIG. 1 , the control mechanism 6 includes an airbag 61, a fixing body 62, two springs 63, an inflation main pipe 64, and an air pump 66. The middle of the airbag 61 is fixed to the middle of the transverse tube 52 through the fixing body 62. The two piston sliders 54 are connected to the fixing body 62 through the springs 63 and are sleeved outside the airbag 61. When the airbag 61 is in a deflated state, the two piston sliders 54 are contracted to the position as shown in FIG. 1 under the action of the springs 63. Figure 4 In the state shown, the piston slider 54 does not block or block the drain pipe 51 , and the water in the drain pipe 51 can be discharged from the bottom end of the drain pipe 51 into the drain groove 31 after passing through the transverse pipe 52 .
[0045] The shape of the airbag 61 when not inflated is a wave tooth shape extending along its length. The airbag is made of rubber material, and by setting the wave tooth shape, it can be regularly contracted when it is contracted, and can also be gradually expanded along the length direction of the wave tooth shape when it is expanded. The outer diameter of the airbag 61 in the inflated state is smaller than the inner diameter of the spring 63.
[0046] The inlet end of the inflation main pipe 64 is connected to the air pump 66, and the outlet end is connected to the middle part of the air bag 61 through the branch pipe 65. The model of the air pump can be the air pump of Fanttik X8 APEX, which can have both inflation and deflation functions.
[0047] On the top of the concrete layer 3, there are crisscross deformation grooves 33. The setting of the deformation grooves 33 can, on the one hand, reduce the cracking direction of the concrete layer 3, enabling it to have a certain margin for scaling. On the other hand, it can enhance the connection strength with the asphalt layer 4 and improve the anti-deformation ability of the asphalt layer 4. Secondly, the deformation grooves 33 can also have a certain water storage capacity, which can prevent the concrete layer 3 from drying and cracking due to high temperature, and can also provide water for cooling the concrete layer 3 in summer, effectively avoiding the large temperature difference between day and night of the concrete layer 3 in summer and reducing the cracking risk.
[0048] The combined surface layer structure of the present invention further includes a water replenishing mechanism. The water replenishing mechanism includes a water replenishing pipe 7 and a water pump 9. The water replenishing pipe 7 is arranged along the length direction of the top of the concrete layer 3. There are water outlet pipes 8 on both sides of the water replenishing pipe 7. The water outlet pipes 8 are parallel to the top surface of the concrete layer 3. The parallel arrangement of the water outlet pipes 8 and the concrete layer 3 can prevent the blockage of their outlets when the asphalt layer 4 is laid. The water pump 9 is connected to the water inlet end of the water replenishing pipe 7.
[0049] Principle of the water replenishing mechanism: When the temperature of the asphalt layer 4 reaches a relatively high level in summer, water can be sprayed through the water replenishing mechanism. The replenished water will accumulate in the deformation grooves 33 and be stored for a period of time. The water in the crisscross deformation grooves 33 can timely replenish water for the concrete layer 3 and effectively reduce the temperature of the concrete layer 3, preventing it from rapidly evaporating a large amount of water due to the high temperature, preventing its dry shrinkage and cracking, and also avoiding cracking caused by the large temperature difference.
[0050] As Figure 5 shown, when the water replenishing mechanism starts to replenish water, the airbag 61 is inflated by the air pump 66. The airbag 61 gradually inflates and deforms towards both sides. By the inflation of the airbag 61, the piston slider 54 is extruded, blocking the drain pipe 51, which helps to extend the storage time of the water in the deformation grooves 33.
[0051] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-low grade asphalt combined surface structure, comprising a mud layer roadbed (1), a crushed stone layer (2), a concrete layer (3), and an asphalt layer (4) arranged in sequence from bottom to top, characterized in that: The asphalt layer (4) comprises a low-grade layer (41), a medium-grade layer (42), and a high-grade layer (43) arranged in sequence from bottom to top, the high-grade layer (43) uses high-grade asphalt, the medium-grade layer (42) uses medium-grade asphalt, and the low-grade layer (41) uses low-grade asphalt. Drainage grooves (31) are arranged equidistantly along the length direction of the concrete layer (3), the top of the drainage grooves (31) is covered with a water trough support surface (32), and the water trough support surface (32) is provided with an anti-seepage mechanism (5), and the anti-seepage mechanism (5) comprises a plurality of drainage pipes (51), a transverse pipe (52), a support block (53) and a water blocking assembly. The plurality of drainage pipes (51) are vertically arranged on a water tank support surface (32), and the lower part thereof penetrates into the drainage tank (31). The transverse pipe (52) is transversely arranged in the concrete layer (3) and transversely penetrates the drainage pipe (51). The water blocking assembly is arranged in the transverse pipe (52) and can block the drainage pipe (51). The support block (53) is arranged at the top of the drainage pipe (51), and the support block (53) is made of a water-degradable material.
2. A high-low grade asphalt combined surface structure according to claim 1, characterized in that: The support block (53) is formed by mixing 40-60% of a degradable polymer, 20-30% of natural fibers, 10-20% of an inorganic filler, 5-10% of a cross-linking agent, and 5-10% of a degradation accelerator.
3. The high-low grade asphalt combined surface structure according to claim 1, characterized in that: Each transverse pipe (52) corresponds to two groups of drainage pipes (51), each group of drainage pipes (51) may be multiple, the two groups of drainage pipes (51) are respectively arranged on two adjacent drainage grooves (31), and the two groups of drainage pipes (51) are respectively vertically connected with both ends of the transverse pipe (52).
4. A high-low grade asphalt combined surface structure according to claim 3, characterized in that: The water blocking assembly comprises two piston sliders (54) and a control mechanism (6). The two piston sliders (54) are slidably fitted in the transverse pipe (52) and can respectively block two groups of corresponding drainage pipes (51). The control mechanism (6) is used to simultaneously control the two piston sliders (54) to move in opposite or opposite directions.
5. A high-low grade asphalt combined surface structure according to claim 4, characterized in that: The control mechanism (6) comprises an airbag (61), a fixed body (62), two springs (63), an inflation main pipe (64) and an air pump (66); the middle part of the airbag (61) is fixed to the middle part of the transverse tube (52) through the fixed body (62); the two piston sliders (54) are respectively connected to the fixed body (62) through the springs (63) and are sleeved outside the airbag (61); the inlet end of the inflation main pipe (64) is connected to the air pump (66), and the outlet end is connected to the middle part of the airbag (61) through a branch pipe (65).
6. A high-low grade asphalt combined surface structure according to claim 5, characterized in that: The outer shape of the airbag (61) when not inflated is a wave tooth shape extending along its length direction.
7. The high-low grade asphalt combined surface structure according to claim 1, characterized in that: The top of the drain pipe (51) is flush with the sink support surface (32), a circle of limiting rings (55) for supporting the support block (53) is arranged inside the drain pipe (51), and the top surface of the support block (53) is flush with the top inlet of the drain pipe (51).
8. The high-low grade asphalt combined surface structure according to claim 1, characterized in that: The top of the concrete layer (3) is provided with crisscrossing deformation grooves (33).
9. A high-low grade asphalt combined surface structure according to claim 8, characterized in that: It also comprises a water replenishment mechanism, which comprises a water replenishment pipe (7) and a water pump (9). The water replenishment pipe (7) is arranged along the length direction of the top of the concrete layer (3). Water outlet pipes (8) are arranged on both sides of the water replenishment pipe (7). The water outlet pipes (8) are parallel to the top surface of the concrete layer (3). The water pump (9) is connected to the water inlet end of the water replenishment pipe (7).
10. The high-low grade asphalt combined surface structure according to claim 1, characterized in that: The thickness of the high-grade layer (41) is 8-10 cm, the thickness of the medium-grade layer (42) is 6-8 cm, and the thickness of the low-grade layer (43) is 4-6 cm.