Municipal road cold regeneration asphalt pavement structure
By introducing drainage cylinders and filter shell systems into asphalt pavements, the problem of poor drainage performance of asphalt pavements has been solved, enabling rapid drainage and extending the service life of the pavement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN MINJIE DECORATION ENG CO LTD
- Filing Date
- 2025-09-04
- Publication Date
- 2026-07-24
Smart Images
Figure CN224548881U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of asphalt pavement, and in particular to a cold recycled asphalt pavement structure for municipal roads. Background Technology
[0002] Asphalt pavement refers to various types of pavement constructed by incorporating road asphalt materials into mineral materials. Asphalt binders improve the ability of paving aggregates to resist damage to the pavement from traffic and natural factors, resulting in a smooth, dust-free, impermeable, and durable pavement. Cold recycling technology is an economical and environmentally friendly method for asphalt pavement repair and reconstruction. It involves treating old asphalt pavement materials on-site, adding appropriate recycling agents and other materials to restore their properties and repave them as new pavement layers.
[0003] The existing publication number CN218842762U, entitled "An Asphalt Pavement Structure," comprises, from bottom to top: a subgrade, a subbase, a semi-rigid base course, a hot-dip asphalt synchronous chip seal, a first asphalt-stabilized chip seal layer, and an asphalt surface layer. The first asphalt-stabilized chip seal layer has a porosity greater than or equal to a first preset threshold, and its maximum nominal particle size falls within a first range. The thickness of the first asphalt-stabilized chip seal layer is greater than or equal to a second preset threshold. The cross slope between the semi-rigid base course and the hot-dip asphalt synchronous chip seal is K times the designed cross slope of the asphalt surface layer, where K is greater than 1. Through this method, the asphalt pavement structure of this invention can suppress reflective cracking and prevent water damage, substantially improving the road performance and service life of semi-rigid base asphalt pavements.
[0004] Regarding the aforementioned technologies, the inventors discovered that the lack of drainage components in the asphalt pavement resulted in poor drainage performance. Prolonged water accumulation on the asphalt pavement prevented rapid drainage, leading to a soft foundation and subsequent cracking under pressure, thus affecting its service life. Utility Model Content
[0005] To overcome the shortcomings of existing asphalt pavements, such as the lack of drainage components leading to poor drainage, prolonged water accumulation and inability to drain quickly, resulting in a soft foundation and cracks under pressure, thus affecting the service life of the asphalt pavement, this application provides a cold recycled asphalt pavement structure for municipal roads.
[0006] The technical solution for a cold recycled asphalt pavement structure for municipal roads provided in this application is as follows: A municipal road cold recycled asphalt pavement structure includes a foundation, a subbase, a hardening layer, an emulsified asphalt layer, and a cold recycled asphalt layer. The subbase is laid on the top surface of the foundation, and the hardening layer is placed on top of the subbase. The emulsified asphalt layer is laid on the top surface of the hardening layer, and the cold recycled asphalt layer is laid on the top surface of the emulsified asphalt layer. The hardening layer includes a lower concrete layer and an upper concrete layer. The lower concrete layer is laid on top of the subbase, and the upper concrete layer is assembled on top of the lower concrete layer. A flow channel is horizontally opened through one side of the upper concrete layer, and multiple drainage cylinders are connected to the top surface of the flow channel vertically through the top surface of the upper concrete layer. The top of the drainage cylinder is set through the emulsified asphalt layer and the cold recycled asphalt layer, and a sealing ring is horizontally set inside the drainage cylinder. An inner filter shell is vertically fixed through the center of the sealing ring.
[0007] By adopting the above technical solution, in the application of cold recycled asphalt pavement on municipal roads, the asphalt pavement foundation is first compacted, then a subbase is laid on the foundation, and a lower concrete layer for hardening is poured on top of the subbase. After the lower concrete layer is poured, multiple slots are formed on the top surface of the lower concrete layer using molds. After the lower concrete layer hardens, the hardened upper concrete layer is laid on top of the lower concrete layer. Then, an emulsified asphalt layer and a cold recycled asphalt layer are laid vertically on top of the upper concrete layer to complete the pavement installation. During use, water on the road surface flows downward from the top of the inner filter shell at the center of the top ring of the drainage pipe into the flow channel of the upper concrete layer. The flow channel collects the water and drains it from the asphalt pavement, thus avoiding the problem of prolonged water immersion on the asphalt pavement, which cannot be drained quickly, causing the asphalt pavement foundation to soften and crack under pressure, affecting the service life of the asphalt pavement. This improves the drainage rate of the asphalt pavement.
[0008] Optionally, a support rod is vertically fixed to the bottom surface of the inner filter shell, and a floating platform is vertically fixed to the bottom end of the support rod.
[0009] By adopting the above technical solution, the support rods that are vertically fixed on the bottom surface of the inner filter shell extend downward through the drainage cylinder and into the flow channel of the upper concrete layer. The floating platform at the bottom of the textured surface floats on the water level in the flow channel of the upper concrete layer. As a result, when there is a lot of water on the road surface later, the water level in the flow channel of the upper concrete layer rises, lifting the floating platform to the surface. The floating platform lifts the support rod to move upward, which drives the sealing ring to move vertically upward and slide out of the drainage cylinder, thus controlling the flow rate of drainage.
[0010] Optionally, a sealing ring is horizontally embedded and fixed on the outer circumferential surface of the sealing ring, and an outer filter shell is fixed on the bottom surface of the sealing ring outside the inner filter shell.
[0011] By adopting the above technical solution, an outer filter shell is fixed to the outside of the inner filter shell. After the sealing ring moves vertically upward and slides out of the drain cylinder, it drives the outer filter shell to slide upward. The filter holes on the outer circumference of the outer filter shell are used to filter the accumulated water and accelerate its entry into the drain cylinder.
[0012] Optionally, one end of the flow channel of the upper concrete layer is provided with an assembly slot, and the other end of the flow channel of the upper concrete layer is horizontally connected to and fixed with an assembly frame. Multiple adjacent assembly frames of the upper concrete layer are connected to and inserted into the assembly slot.
[0013] By adopting the above technical solution, the assembly frames and assembly slots at the adjacent ends of the multiple upper concrete layers are connected and inserted to guide the accumulated water to collect and discharge.
[0014] Optionally, multiple connection slots are evenly and vertically arranged on the top surface of the lower concrete layer.
[0015] By adopting the above technical solution, multiple connection slots are opened on the top surface of the lower concrete layer, which facilitates the subsequent docking and assembly of the upper concrete layer.
[0016] Optionally, multiple inserts are evenly and vertically fixed on the bottom surface of the upper concrete layer, and the multiple inserts are inserted into and matched with multiple connecting slots one by one.
[0017] By adopting the above technical solution, multiple inserts are evenly and vertically fixed on the bottom surface of the upper concrete layer, and the multiple inserts are connected to multiple connecting slots one by one, thus limiting the assembly of multiple upper concrete layers on the top surface of the lower concrete layer. The multiple upper concrete layers assembled on the lower concrete layer can be disassembled, allowing for quick disassembly of the upper concrete layers to replace damaged road surfaces later.
[0018] Optionally, multiple connecting frames are provided between the emulsified asphalt layer and the cold recycled asphalt layer, and the multiple connecting frames are laterally connected to form multiple reinforcing strips.
[0019] By adopting the above technical solution, multiple connecting frames are set between the emulsified asphalt layer and the cold recycled asphalt layer. The multiple connecting frames are laterally connected to form multiple reinforcing strips to increase the reinforcement of the emulsified asphalt layer and the cold recycled asphalt layer.
[0020] Optionally, card frames and cards are fixed on the vertical end faces of the multiple connecting frames respectively, and the card frames and cards on the adjacent vertical end faces of the multiple connecting frames are connected and installed.
[0021] By adopting the above technical solution, the card frames and cards on the adjacent vertical end faces of multiple connecting frames are connected and installed, which facilitates the subsequent connection of multiple connecting frames together.
[0022] In summary, this application includes at least one of the following beneficial technical effects: In the application of cold recycled asphalt pavement on municipal roads, the asphalt pavement foundation is first compacted, then a subbase is laid on the foundation. A lower concrete layer, which is then used as a hardening layer, is poured on top of the subbase. After the lower concrete layer is poured, multiple slots are formed on its top surface using molds. Once the lower concrete layer has hardened, the hardened upper concrete layer is laid on top of it. Finally, an emulsified asphalt layer and a cold recycled asphalt layer are laid vertically on top of the upper concrete layer, completing the pavement installation. During use, surface water flows downwards from the top of the inner filter shell at the center of the drainage pipe's sealing ring into the flow channel of the upper concrete layer. The flow channel collects the water and drains it from the asphalt pavement. This prevents prolonged water immersion in the asphalt pavement, which can lead to a soft foundation and cracks in the pavement under pressure, thus affecting its service life and improving the drainage rate of the asphalt pavement. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the overall structure of the embodiment of this application in an exploded state; Figure 3 This is a structural schematic diagram of the concrete layer in the decomposed state according to the embodiments of this application; Figure 4 This is a structural schematic diagram of the concrete layer in the decomposed state in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the connecting frame in the exploded state according to an embodiment of this application.
[0024] Explanation of reference numerals in the attached drawings: 1. Foundation; 2. Subbase; 3. Hardened layer; 31. Lower concrete layer; 311. Connecting slot; 32. Upper concrete layer; 321. Insert block; 322. Flow channel; 3221. Assembly slot; 3222. Assembly insert frame; 33. Drainage cylinder; 34. Sealing ring; 35. Inner filter shell cylinder; 36. Support rod; 37. Floating platform; 38. Outer filter shell cylinder; 39. Sealing ring; 4. Emulsified asphalt layer; 5. Cold recycled asphalt layer; 6. Connecting frame; 61. Frame clip; 62. Card. Detailed Implementation
[0025] The present application will be further described in detail below with reference to the accompanying drawings.
[0026] This application discloses a cold recycled asphalt pavement structure for municipal roads. (Refer to...) Figure 1 , Figure 2 , Figure 3 and Figure 4A cold recycled asphalt pavement structure for municipal roads includes a foundation 1, a subbase 2, a hardening layer 3, an emulsified asphalt layer 4, and a cold recycled asphalt layer 5. The subbase 2 is laid on the top surface of the foundation 1, and the hardening layer 3 is placed above the subbase 2. The emulsified asphalt layer 4 is laid on the top surface of the hardening layer 3, and the cold recycled asphalt layer 5 is laid on the top surface of the emulsified asphalt layer 4. The hardening layer 3 includes a lower concrete layer 31 and an upper concrete layer 32. The lower concrete layer 31 is laid on top of the subbase 2, and the upper concrete layer 32 is assembled on top of the lower concrete layer 31. A flow channel 322 is horizontally opened through one side of the upper concrete layer 32, and multiple drainage cylinders 33 are vertically connected to the top surface of the flow channel 322. The top of the drainage cylinder 33 is set upward through the emulsified asphalt layer 4 and the cold recycled asphalt layer 5, and a sealing ring 34 is horizontally arranged inside the drainage cylinder 33. An inner filter shell cylinder 35 is vertically fixed through the center of the sealing ring 34. In the application of cold recycled asphalt pavement on municipal roads, the asphalt pavement foundation 1 is first compacted. Then, a subbase 2 is laid on the foundation 1. Next, a lower concrete layer 31, the hardened layer 3, is poured and laid on top of the subbase 2. After the lower concrete layer 31 is poured, multiple slots 311 are formed on its top surface using molds. After the lower concrete layer 31 hardens, an upper concrete layer 32, which has been hardened and formed, is laid on top of the lower concrete layer 31. Finally, the upper concrete layer 32 is laid vertically on its top surface. The emulsified asphalt layer 4 and the cold recycled asphalt layer 5 are laid to complete the road surface installation. During use, water on the road surface flows downward from the top of the inner filter shell 35 at the center of the top sealing ring 34 of the drainage pipe 33 into the flow channel 322 of the upper concrete layer 32. The flow channel 322 collects the water and discharges it from the asphalt road surface, thereby avoiding the problem that the asphalt road surface cannot be quickly drained due to prolonged water immersion, which leads to a soft foundation of the asphalt road surface and cracks after being squeezed, affecting the service life of the asphalt road surface. This improves the drainage rate of the asphalt road surface.
[0027] Reference Figure 4A support rod 36 is vertically fixed to the bottom surface of the inner filter shell 35, and a floating platform 37 is vertically fixed to the bottom end of the support rod 36. The support rod 36, vertically fixed to the bottom surface of the inner filter shell 35, extends downward through the drainage cylinder 33 and into the flow channel 322 of the upper concrete layer 32. The floating platform 37 at the bottom end of the support rod 36 floats above the water level in the flow channel 322 of the upper concrete layer 32. Therefore, when there is a lot of water on the road surface later, the water level in the flow channel 322 of the upper concrete layer 32 rises, lifting the floating platform 37 to float. The floating platform 37 lifts the support rod 36 and moves it upward, causing the sealing ring 34 to move vertically upward and slide out of the drainage cylinder 33, thus controlling the drainage flow rate. A sealing ring 39 is horizontally embedded and fixed on the outer circumference of the sealing ring 34, and an outer filter shell 38 is fixed to the outside of the inner filter shell 35 on the bottom surface of the sealing ring 34. An outer filter shell 38 is fixed to the outside of the inner filter shell 35. After the sealing ring 34 moves vertically upward and slides out of the drain cylinder 33, it drives the outer filter shell 38 to slide upward. The filter holes on the outer circumference of the outer filter shell 38 are used to filter the accumulated water and accelerate its entry into the drain cylinder 33.
[0028] Reference Figure 4 One end of the flow channel 322 of the upper concrete layer 32 is provided with an assembly slot 3221, and the other end of the flow channel 322 of the upper concrete layer 32 is horizontally connected and fixed with an assembly frame 3222. Multiple adjacent assembly frames 3222 of the upper concrete layer 32 are connected and inserted into the assembly slot 3221. In use, the assembly frames 3222 at adjacent ends of the flow channels 322 of multiple upper concrete layers 32 are connected and inserted into the assembly slot 3221 to guide the drainage of accumulated water. Multiple connecting slots 311 are evenly and vertically arranged on the top surface of the lower concrete layer 31. The multiple connecting slots 311 on the top surface of the lower concrete layer 31 facilitate the subsequent assembly of the upper concrete layer 32. Multiple inserts 321 are evenly and vertically fixed on the bottom surface of the upper concrete layer 32, and the multiple inserts 321 are inserted into the multiple connecting slots 311 one by one. Multiple insert blocks 321 are evenly and vertically fixed on the bottom surface of the upper concrete layer 32, and the multiple insert blocks 321 are inserted into and cooperate with multiple connecting slots 311 one by one, so as to limit the assembly of multiple upper concrete layers 32 on the top surface of the lower concrete layer 31. The multiple upper concrete layers 32 are assembled on the lower concrete layer 31 in a detachable manner, so that the upper concrete layers 32 can be quickly disassembled later to replace the damaged road surface.
[0029] Reference Figure 5Multiple connecting frames 6 are provided between the emulsified asphalt layer 4 and the cold recycled asphalt layer 5, and these connecting frames 6 are laterally connected to form multiple reinforcing strips. The multiple connecting frames 6, by being laterally connected to form multiple reinforcing strips, increase the reinforcement of the emulsified asphalt layer 4 and the cold recycled asphalt layer 5. Each of the two vertical ends of the multiple connecting frames 6 has a locking frame 61 and a locking clip 62, and the locking frames 61 and locking clips 62 on adjacent vertical ends of the multiple connecting frames 6 are interlocked. This interlocking of the locking frames 61 and locking clips 62 on adjacent vertical ends of the multiple connecting frames 6 facilitates the later joining of the multiple connecting frames 6 together.
[0030] The implementation principle of a municipal road cold recycled asphalt pavement structure according to an embodiment of this application is as follows: During the use of the municipal road cold recycled asphalt pavement, firstly, the asphalt pavement foundation 1 is compacted, then a subbase 2 is laid on the foundation 1. Next, a lower concrete layer 31, consisting of a hardened layer 3, is poured and laid on the top surface of the subbase 2. After the lower concrete layer 31 is poured, multiple slots 311 are formed on its top surface using a mold. After the lower concrete layer 31 hardens, an upper concrete layer 32, which has been hardened and formed, is laid on top of the lower concrete layer 31. Then, an emulsified asphalt layer 4 and a cold recycled asphalt layer 5 are laid vertically on the top surface of the upper concrete layer 32, completing the pavement installation. During use, surface water flows downwards from the top of the inner filter shell 35 at the center of the top sealing ring 34 of the drainage pipe 33. The water flows into the channel 322 of the upper concrete layer 32, where it collects water and drains the asphalt pavement. A vertically fixed support rod 36 on the bottom surface of the inner filter shell cylinder 35 extends downward through the drainage cylinder 33 and into the channel 322 of the upper concrete layer 32. The floating platform 37 at the bottom of the support rod 36 floats above the water level in the channel 322 of the upper concrete layer 32. As a result, when there is a lot of water on the road surface later, the water level in the channel 322 of the upper concrete layer 32 rises, lifting the floating platform 37. The floating platform 37 lifts the support rod 36 and moves it upward, causing the sealing ring 34 to move vertically upward and slide out of the drainage cylinder 33. An outer filter shell cylinder 38 is fixed to the outside of the inner filter shell cylinder 35. After the sealing ring 34 moves vertically upward and slides out of the drainage cylinder 33, it causes the outer filter shell cylinder 38 to slide upward. The filter holes on the outer circumference of the outer filter shell cylinder 38 are used to filter the accumulated water and accelerate its entry into the drainage cylinder 33.
[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A cold recycled asphalt pavement structure for municipal roads, characterized in that, The foundation includes a foundation (1), a subbase (2), a hardening layer (3), an emulsified asphalt layer (4), and a cold recycled asphalt layer (5). The subbase (2) is laid on the top surface of the foundation (1), and the hardening layer (3) is provided above the subbase (2). The emulsified asphalt layer (4) is laid on the top surface of the hardening layer (3), and the cold recycled asphalt layer (5) is laid on the top surface of the emulsified asphalt layer (4). The hardening layer (3) includes a lower concrete layer (31) and an upper concrete layer (32). The lower concrete layer (31) is laid on the subbase. Above (2), and above the lower concrete layer (31), the upper concrete layer (32) is assembled. A flow channel (322) is horizontally opened on one side of the upper concrete layer (32), and multiple drainage cylinders (33) are connected to the top surface of the flow channel (322) vertically. The top of the drainage cylinder (33) is set to penetrate the emulsified asphalt layer (4) and the cold recycled asphalt layer (5) upward. A sealing ring (34) is horizontally set inside the drainage cylinder (33), and an inner filter shell cylinder (35) is vertically fixed at the center of the sealing ring (34).
2. The municipal road cold recycled asphalt pavement structure according to claim 1, characterized in that: A support rod (36) is vertically fixed on the bottom surface of the inner filter shell (35), and a floating platform (37) is vertically fixed at the bottom end of the support rod (36).
3. The municipal road cold recycled asphalt pavement structure according to claim 2, characterized in that: A sealing ring (39) is horizontally embedded and fixed on the outer circumferential surface of the sealing ring (34), and an outer filter shell (38) is fixed on the bottom surface of the sealing ring (34) outside the inner filter shell (35).
4. The municipal road cold recycled asphalt pavement structure according to claim 1, characterized in that: One end of the flow channel (322) of the upper concrete layer (32) is provided with an assembly slot (3221), and the other end of the flow channel (322) of the upper concrete layer (32) is horizontally connected to and fixed with an assembly frame (3222). Multiple adjacent assembly frames (3222) of the upper concrete layer (32) are connected to the assembly slot (3221) for insertion.
5. The municipal road cold recycled asphalt pavement structure according to claim 1, characterized in that: Multiple connection slots (311) are evenly and vertically arranged on the top surface of the lower concrete layer (31).
6. The municipal road cold recycled asphalt pavement structure according to claim 5, characterized in that: Multiple inserts (321) are evenly and vertically fixed on the bottom surface of the upper concrete layer (32), and the multiple inserts (321) are inserted into and matched with multiple connecting slots (311).
7. The municipal road cold recycled asphalt pavement structure according to claim 1, characterized in that: Multiple connecting frames (6) are provided between the emulsified asphalt layer (4) and the cold recycled asphalt layer (5), and the multiple connecting frames (6) are laterally connected to form multiple reinforcing strips.
8. The municipal road cold recycled asphalt pavement structure according to claim 7, characterized in that: Card frames (61) and cards (62) are fixed on the vertical ends of the multiple connecting frames (6) respectively, and the card frames (61) and cards (62) on the adjacent vertical ends of the multiple connecting frames (6) are connected and fitted together.
Citation Information
Patent Citations
CN218842762U