A multi-layer composite water-permeable pavement structure for wetland sensitive areas

Abstract

This utility model discloses a multi-layer composite permeable pavement structure for wetland sensitive areas, belonging to the field of road construction technology. It includes a road base layer and side guards installed on both sides of the road base layer. Above the road base layer, a road subbase, a cement mortar layer, a load-bearing layer, a gravel layer, a porous permeable concrete layer, and a permeable asphalt layer are sequentially arranged. Above the load-bearing layer, between the gravel layers, a drainage guide layer is provided for auxiliary drainage. Drainage through holes that cooperate with the drainage guide layer are opened on the inner surface of the side guards. The top of the permeable asphalt layer is provided with main drainage holes for rapid water permeability. A drainage outlet is opened on the bottom of one side of the side guards. This utility model can conveniently drain accumulated water, further reducing the amount of water remaining on the road surface in wet conditions, effectively reducing moss growth, ensuring the anti-skid effect of the pavement structure, and improving the safety of road use.

Description

Technical Field

[0001] This utility model relates to the field of road construction technology, specifically to a multi-layer composite permeable pavement structure for wetland sensitive areas. Background Technology

[0002] Composite pavement is a pavement whose surface layer is composed of two structural layers with different material types and mechanical properties. It can fully utilize the performance advantages of both flexible and rigid pavements, achieving an effective and reasonable combination of flexible and rigid pavements. Permeable pavement refers to pavement constructed using permeable materials, generally permeable cement concrete and permeable asphalt mixtures. Wetlands, as water catchment areas, often experience runoff from surrounding areas converging on pavement in humid environments. This not only affects the anti-skid performance of the pavement structure but also leads to significant water accumulation after rain, which is difficult to infiltrate. Over time, this can cause bacterial growth and moss formation, making the pavement even more slippery and posing a safety hazard. Therefore, we need to propose a multi-layered composite permeable pavement structure for wetland sensitive areas. Utility Model Content

[0003] The purpose of this invention is to provide a multi-layer composite permeable pavement structure for wetland sensitive areas, which can facilitate drainage of accumulated water, further reduce the amount of water remaining on the road surface in wet rainy weather, effectively reduce moss growth, ensure the anti-slip effect of the pavement structure, and improve the safety of road use, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides: a multi-layer composite permeable pavement structure for wetland sensitive areas, comprising a road base layer and side guards disposed on both sides of the road base layer; a road subbase layer, a cement mortar layer, a load-bearing layer, a sand and gravel layer, a porous permeable concrete layer, and a permeable asphalt layer are sequentially disposed above the road base layer; an auxiliary drainage guide layer is disposed above the load-bearing layer between the sand and gravel layers; drainage through holes that cooperate with the guide layer are opened on the inner surface of the side guards; main drainage holes for rapid water permeability are distributed on the top of the permeable asphalt layer; and a drainage outlet is opened on the bottom of one side of the side guards.

[0005] Preferably, the interior of the bearing layer is provided with a bearing reinforcement column for auxiliary bearing, and the top end of the bearing reinforcement column is connected to the bottom of the flow guiding layer.

[0006] Preferably, the bottom end of the load-bearing reinforcing column is connected to the top of the cement mortar layer, and the cement mortar layer is interwoven with reinforcing ribs.

[0007] Preferably, the surface of the flow guiding layer is provided with a flow guiding groove, and drainage channels communicating with the flow guiding groove are provided on both sides of the flow guiding layer. The drainage channels are connected with the drainage through holes.

[0008] Preferably, a collection channel is provided on the top of the porous permeable concrete layer, and water-permeable holes are provided on the inner wall of the collection channel, with the bottom of the water-permeable holes communicating with the sand and gravel layer.

[0009] Preferably, the inner cavity of the side guard is provided with a stabilizing guide block located below the drainage hole.

[0010] Preferably, a drain filter is detachably installed inside the main drain hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This utility model utilizes a combination of structures including a road base layer, cement mortar layer, load-bearing layer, side guardrail, diversion layer, porous permeable concrete layer, and permeable asphalt layer. The load-bearing reinforcement pillars within the load-bearing layer and the reinforcing ribs within the cement mortar layer form a three-dimensional support structure. Combined with the side guardrails on both sides, this prevents lateral soil erosion and effectively improves the integrity of the road in soft soil wetland environments. The main drainage holes in the permeable asphalt layer, the collection channels and permeable holes in the porous permeable concrete layer, and the diversion channels and drainage channels in the diversion layer work together to effectively form a dual drainage path of "vertical infiltration + lateral diversion." Combined with the drainage holes in the side guardrail, rainwater quickly infiltrates and is directed outwards into the side guardrail, reducing the hydraulic impact of surface runoff on wetland sensitive areas, minimizing the risk of surface water accumulation, ensuring the anti-skid effect of the road structure, and improving road safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the pavement cross-section structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the cross-sectional front view of the present invention;

[0016] Figure 4 This utility model Figure 3 A magnified structural diagram of area A.

[0017] In the diagram: 1. Road base course; 2. Road subbase; 3. Cement mortar layer; 4. Reinforcing ribs; 5. Load-bearing layer; 6. Load-bearing reinforced support; 7. Side guardrail; 8. Stabilizing guide block; 9. Drainage outlet; 10. Drainage through hole; 11. Guide layer; 12. Guide channel; 13. Drainage channel; 14. Sand and gravel layer; 15. Porous permeable concrete layer; 16. Collection channel; 17. Permeable hole; 18. Permeable asphalt layer; 19. Main drain hole; 20. Drainage filter. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a multi-layer composite permeable pavement structure for wetland sensitive areas, including a road base layer 1 and side guards 7 disposed on both sides of the road base layer 1; a road subbase layer 2, a cement mortar layer 3, a bearing layer 5, a sand and gravel layer 14, a porous permeable concrete layer 15, and a permeable asphalt layer 18 are disposed sequentially on the road base layer 1; a drainage guide layer 11 for auxiliary drainage is disposed above the bearing layer 5 between the sand and gravel layers 14; drainage through holes 10 that cooperate with the drainage guide layer 11 are opened on the inner surface of the side guards 7; a main drainage hole 19 for rapid water permeability is distributed on the top of the permeable asphalt layer 18; and a drainage outlet 9 is opened on the bottom of one side of the side guards 7.

[0020] It is worth noting that the coordinated arrangement of the road base layer 1, cement mortar layer 3, load-bearing layer 5, side guard frame 7, diversion layer 11, porous permeable concrete layer 15, and permeable asphalt layer 18 facilitates drainage of accumulated water, further reducing the amount of water remaining on the road surface in wet rainy weather, effectively reducing moss growth, ensuring the anti-skid effect of the road surface structure, and improving the safety of road use.

[0021] In addition, the bearing layer 5 is internally equipped with auxiliary load-bearing reinforcing supports 6, the top of which is connected to the bottom of the guide layer 11. The bottom of the load-bearing reinforcing supports 6 is connected to the top of the cement mortar layer 3, and reinforcing ribs 4 are interwoven inside the cement mortar layer 3. The bearing layer 5, together with the load-bearing reinforcing supports 6, provides load-bearing support for the road surface. Together with the cement mortar layer 3 and the reinforcing ribs 4, it forms a three-dimensional support structure, further improving the stability of the roadbed. In conjunction with the side guard frame 7, it can further prevent soil erosion.

[0022] The guide layer 11 has guide grooves 12 on its surface, and drainage channels 13 connected to the guide grooves 12 are provided on both sides of the guide layer 11. The drainage channels 13 are connected to the drainage holes 10. The guide layer 11, together with the surface guide grooves 12 and the drainage channels 13 on both sides, further improves the permeability and drainage effect of the road. At the same time, the guide layer 11 can retain some moisture in the rainy season or humid environment. At high temperatures, the moisture evaporates through the pores, absorbing heat and achieving an evaporative cooling effect, which significantly reduces the surface temperature of the road surface. The design of the guide grooves and drainage channels ensures uniform moisture distribution and avoids thermal stress cracks caused by uneven local wetting and drying.

[0023] Furthermore, the top of the porous permeable concrete layer 15 is provided with a collection channel 16, and the inner wall of the collection channel 16 is provided with permeable holes 17, the bottom of which is connected to the sand and gravel layer 14. The interior of the porous permeable concrete layer 15 has continuous pores forming air circulation channels, promoting heat exchange, preventing heat accumulation, and reducing the road surface temperature in summer. The sand and gravel layer 14 has a high heat capacity and porosity, absorbing solar radiation heat during the day and slowly releasing it, and dissipating heat through air convection at night, reducing sudden rises or falls in road surface temperature. The porous air layer of the sand and gravel layer 14 and the porous permeable concrete layer 15 has a low thermal conductivity, which can block the infiltration of cold air from the ground and prevent the road base layer from freezing and swelling. Moreover, if the diversion layer 11 uses antifreeze modified materials, such as incorporating phase change materials, it can further inhibit freeze-thaw cycle damage. The sand and gravel layer uses a mixture of dark gravel and light aggregate to balance the temperature difference between day and night; in the porous permeable concrete, high thermal conductivity fillers such as graphite and steel slag are added to actively regulate the heat flow distribution and improve temperature adaptability.

[0024] Specifically, the inner cavity of the side guard 7 is equipped with a stabilizing guide block 8 located below the drainage hole 10. A drain filter 20 is detachably installed inside the main drain hole 19. The drain filter 20 is a filtration structure for the water flowing down the main drain hole 19, preventing the main drain hole 19 from becoming clogged. The stabilizing guide block 8 is a structure that guides rainwater on the guide layer 11 through the drainage hole 10.

[0025] The three-dimensional support structure formed by the load-bearing reinforced pillars 6 inside the load-bearing layer 5 and the reinforcing ribs 4 inside the cement mortar layer 3, together with the side guards 7 on both sides, prevents lateral soil erosion and effectively improves the integrity maintained in the soft soil wetland environment. Through the main drainage hole 19 of the permeable asphalt layer 18, the collection channel 16 and permeable hole 17 of the porous permeable concrete layer 15, and the guide channel 12 and drainage channel 13 of the guide layer 11, a dual drainage path of "vertical infiltration + lateral guidance" is effectively formed. Together with the drainage holes of the side guards, rainwater can quickly infiltrate and be discharged into the side guards 7, reducing the hydraulic impact of surface runoff on the wetland sensitive area and reducing the risk of surface water accumulation; ensuring the anti-skid effect of the pavement structure and improving the safety of road use.

[0026] Furthermore, it can work in conjunction with the side guard frame 7 to form a rainwater retention system. The double permeable barrier, consisting of a permeable asphalt layer and a porous permeable concrete layer, can effectively filter pollutants such as heavy metals. The sand and gravel layer and the diversion layer further purify the rainwater, and the water quality at the drainage outlet can reach the Class IV standard for surface water, thus maximizing the protection of the wetland's hydrological environment and biological habitat. At the same time, the multi-layered composite structure of the sand and gravel layer, diversion layer, and concrete layer has a temperature regulation effect, adapting to the special environment of large diurnal temperature differences in wetlands.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-layer composite permeable pavement structure for wetland sensitive areas, characterized in that, include: Road base layer (1) and side guardrails (7) installed on both sides of the road base layer (1); The road base layer (1) is provided in sequence with a road sub-layer (2), a cement mortar layer (3), a bearing layer (5), a sand and gravel layer (14), a porous permeable concrete layer (15), and a permeable asphalt layer (18). Above the bearing layer (5), between the sand and gravel layers (14), there is a drainage guide layer (11) for auxiliary drainage. The inner surface of the side guard frame (7) is provided with drainage through holes (10) that cooperate with the drainage guide layer (11). The top of the permeable asphalt layer (18) is provided with main drainage holes (19) that allow rapid water permeability; A drain outlet (9) is provided at the bottom of one side of the side guard (7).

2. The multi-layer composite permeable pavement structure for wetland sensitive areas according to claim 1, characterized in that: The bearing layer (5) is provided with a bearing reinforcement column (6) for auxiliary bearing, and the top of the bearing reinforcement column (6) is connected to the bottom of the flow guiding layer (11).

3. The multi-layer composite permeable pavement structure for wetland sensitive areas according to claim 2, characterized in that: The bottom end of the load-bearing reinforcing column (6) is connected to the top of the cement mortar layer (3), and the interior of the cement mortar layer (3) is interwoven with reinforcing ribs (4).

4. The multi-layer composite permeable pavement structure for wetland sensitive areas according to claim 1, characterized in that: The surface of the flow guiding layer (11) is provided with a flow guiding groove (12), and drainage channels (13) communicating with the flow guiding groove (12) are provided on both sides of the flow guiding layer (11). The drainage channels (13) are connected to the drainage through hole (10).

5. The multi-layer composite permeable pavement structure for wetland sensitive areas according to claim 1, characterized in that: The top of the porous permeable concrete layer (15) is provided with a collection channel (16), and the inner wall of the collection channel (16) is provided with permeable holes (17), the bottom of the permeable holes (17) being connected to the sand and gravel layer (14).

6. The multi-layer composite permeable pavement structure for wetland sensitive areas according to claim 1, characterized in that: The inner cavity of the side guard (7) is provided with a stabilizing guide block (8) located below the drainage through hole (10).

7. The multi-layer composite permeable pavement structure for wetland sensitive areas according to claim 1, characterized in that: A drain filter (20) is detachably installed inside the main drain hole (19).

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