Polyurethane modified asphalt drainage pavement structure

Abstract

The utility model relates to the technical field of pavement drainage structures, in particular to a polyurethane modified asphalt drainage pavement structure which comprises a polyurethane modified asphalt layer, water seepage grooves, water seepage holes, drainage pipes, drainage channels, drainage cover plates and drainage holes. A polyurethane modified asphalt layer is arranged on the top face of the oil sticking layer, a water seepage groove is formed in the top face of the asphalt concrete layer, water seepage holes are formed in the inner side of the water seepage groove, a drainage pipe is arranged in the asphalt concrete layer, a drainage channel is formed in the protection roadbed, a drainage cover plate is arranged on the top face of the protection roadbed, and drainage holes are formed in the top face of the drainage cover plate. By adopting the polyurethane modified asphalt pavement with the open-graded structure, the void ratio of the pavement is increased while water is prevented from eroding the internal structure of the pavement, rainwater can permeate and be discharged from the void conveniently, water accumulation on the pavement is avoided, the driving safety is improved, and more stones are exposed on the surface layer of the pavement, so that the pavement is more environment-friendly. The surface roughness is large, and good anti-sliding capacity can be provided.

Description

Technical Field

[0001] This utility model relates to the field of road drainage structure technology, and in particular to a polyurethane modified asphalt drainage pavement structure. Background Technology

[0002] Asphalt pavement is a type of pavement widely used in road construction. During the construction process, asphalt pavement can form a relatively smooth road surface through the precise paving of pavers and the compaction of road rollers. A smooth asphalt pavement is beneficial to the comfort and safety of vehicle driving, and can reduce vehicle bumps, wear and tear, and fuel consumption.

[0003] During the paving process, existing asphalt pavements are compacted using a road roller and then dried and cooled to form a dense pavement structure. When the rainy season arrives, the dense asphalt pavement makes it difficult for rainwater to penetrate downwards, which can easily lead to water accumulation on the road surface. Vehicles may also slip while driving, which can easily cause traffic accidents.

[0004] Therefore, to address the problem that the dense structure of the aforementioned asphalt pavement hinders rainwater penetration, easily leading to water accumulation and causing vehicles to skid and resulting in traffic accidents, a polyurethane-modified asphalt drainage pavement structure can be designed. By adopting an open-graded polyurethane-modified asphalt pavement, its structure and properties can prevent water from eroding the internal structure of the pavement while increasing the porosity of the pavement, facilitating rainwater penetration, avoiding water accumulation on the road surface, improving driving safety, and exposing more stone on the surface layer of the pavement, which can provide good anti-skid ability and reduce the braking distance of vehicles on wet roads. Utility Model Content

[0005] To overcome the problem that during the road paving process, asphalt pavement is compacted using a road roller and then dried and cooled to form a dense road structure, which makes it difficult for rainwater to penetrate downwards during the rainy season, causing water accumulation on the road surface, making vehicles prone to slipping, and increasing the risk of traffic accidents.

[0006] The technical solution of this utility model is as follows: a polyurethane modified asphalt drainage pavement structure, comprising a subbase, a subbase component, a lower base component, an upper base component, a polyurethane modified asphalt layer, a seepage groove, seepage holes, a drainage pipe, a protective subgrade, a drainage ditch, a drainage outlet, a drainage cover, and drainage holes; the subbase component is provided on the top surface of the subbase, the lower base component is provided on the bottom surface of the subbase component, the upper base component is provided on the top surface of the lower base component, the polyurethane modified asphalt layer is provided on the top surface of the upper base component, a seepage groove is provided on the top surface of the upper base component, seepage holes are provided inside the upper base component, a drainage pipe is provided inside the upper base component, a protective subgrade is provided on the top surface of the subbase, a drainage ditch is provided inside the protective subgrade, a drainage outlet is provided on the side of the drainage ditch, a drainage cover is provided on the top surface of the protective subgrade, and a drainage hole is provided on the top surface of the drainage cover.

[0007] Preferably, the subbase component can improve the bearing capacity of the subgrade, diffuse the load transmitted from the road surface, and reduce the pressure on the upper base component. The subbase component can provide support for the upper base component, which can withstand the vehicle load from the road surface and further transmit the load downwards. The structure and performance of the polyurethane modified asphalt layer can prevent moisture from eroding the internal structure of the road surface. The open-type polyurethane modified asphalt pavement has a high porosity, which facilitates the downward infiltration of rainwater. The infiltration channel can collect the infiltrated rainwater, and the infiltration hole can transport the rainwater into the drainage pipe. The drainage pipe can transport the rainwater to the drainage ditch through the drainage outlet. The protective subgrade can protect the subgrade and prevent it from collapsing. The drainage ditch can collect rainwater and discharge it into the sewer pipe. The drainage cover can prevent branches and other debris from falling into the drainage ditch and avoid blockage. When the rainfall is heavy, the water on the surface of the polyurethane modified asphalt layer can quickly flow into the drainage ditch through the drainage hole to prevent water accumulation on the road surface.

[0008] Preferably, the subbase component includes a soil base layer, a gravel layer, and a cement-soil layer; the top surface of the subbase is provided with a soil base layer, the top surface of the soil base layer is provided with a gravel layer, and the top surface of the gravel layer is provided with a cement-soil layer.

[0009] Preferably, the subbase component includes a waterproof layer, a gravel layer, and a cement layer; a waterproof layer is provided on the top surface of the cement-soil layer, a gravel layer is provided on the top surface of the waterproof layer, and a cement layer is provided on the top surface of the gravel layer.

[0010] Preferably, the upper base layer component includes an oil-permeable layer, an asphalt concrete layer, and an oil-adhesive layer; an oil-permeable layer is provided on the top surface of the cement layer, an asphalt concrete layer is provided on the top surface of the oil-permeable layer, and an oil-adhesive layer is provided on the top surface of the asphalt concrete layer.

[0011] Preferably, a polyurethane-modified asphalt layer is provided on the top surface of the adhesive layer, and a water seepage groove is provided on the top surface of the asphalt concrete layer. Multiple sets of water seepage grooves are provided, and multiple sets of water seepage holes are provided on the inner side of the water seepage grooves. The water seepage holes and the water seepage grooves are interconnected. A drainage pipe is provided inside the asphalt concrete layer, and the water seepage holes and the drainage pipe are interconnected.

[0012] As a preferred option, the protective roadbed is set on the side of the asphalt concrete layer, and two sets of protective roadbeds are set. Drainage outlets are opened on the inner side of the drainage ditch, and the drainage outlets are interconnected with the drainage pipes.

[0013] Preferably, the drainage cover is installed on the top surface of the protective roadbed. There are two sets of drainage covers, which are engaged with the protective roadbed, and multiple sets of drainage holes are provided.

[0014] The beneficial effects of this utility model are:

[0015] 1. Protective roadbeds provide protection for the roadbed, preventing rainwater erosion and subsequent collapse. The use of open-graded polyurethane modified asphalt layers results in a high porosity. During rainfall, the structure and properties of the polyurethane modified asphalt prevent water erosion of the road's internal structure while allowing rainwater to permeate downwards through the gaps between the layers. Infiltration channels collect the permeated rainwater, which then flows through infiltration holes into drainage pipes for transport, thus preventing road surface flooding and improving driving safety. Rainwater permeating into the drainage pipes is transported to drainage ditches for drainage. These ditches facilitate the collection of rainwater before discharge through sewer pipes. Drainage covers prevent debris such as branches from falling into the drainage ditches, avoiding blockages. During heavy rainfall, some rainwater on the surface of the polyurethane modified asphalt layer is discharged through infiltration, while the remaining rainwater flows through drainage holes into the drainage ditches, accelerating drainage and preventing road surface flooding. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of a polyurethane-modified asphalt drainage pavement according to this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional structural schematic of a polyurethane-modified asphalt drainage pavement subbase component according to this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional structural rendering of the permeable structure of a polyurethane-modified asphalt drainage pavement according to this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of a polyurethane-modified asphalt drainage pavement structure according to this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Subgrade; 201. Soil base; 202. Sand and gravel layer; 203. Cement-soil layer; 301. Waterproof layer; 302. Crushed stone layer; 303. Cement layer; 401. Permeable layer; 402. Asphalt concrete layer; 403. Adhesive layer; 51. Polyurethane modified asphalt layer; 52. Infiltration trench; 53. Infiltration hole; 54. Drainage pipe; 61. Protective subgrade; 62. Drainage ditch; 63. Drainage outlet; 64. Drainage cover; 65. Drainage hole. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-4 This utility model provides an embodiment: a polyurethane modified asphalt drainage pavement structure, including a base course 1, a subbase component, a lower base course component, an upper base course component, a polyurethane modified asphalt layer 51, a seepage groove 52, seepage holes 53, a drainage pipe 54, a protective subgrade 61, a drainage ditch 62, a drainage outlet 63, a drainage cover 64, and drainage holes 65; the top surface of the base course 1 is provided with the subbase component, the bottom surface of the subbase component is provided with the lower base course component, and the top surface of the lower base course component is provided with the upper base course component. The top surface is provided with a polyurethane modified asphalt layer 51. A drainage groove 52 is formed on the top surface of the upper base course component. Drainage holes 53 are formed inside the upper base course component. A drainage pipe 54 is installed inside the upper base course component. A protective subgrade 61 is formed on the top surface of the subgrade 1. A drainage ditch 62 is formed inside the protective subgrade 61. Drainage outlets 63 are formed on the sides of the drainage ditch 62. A drainage cover 64 is formed on the top surface of the protective subgrade 61. Drainage holes 65 are formed on the top surface of the drainage cover 64. The subbase course component can improve the bearing capacity of the subgrade. The lower base layer component provides support for the upper base layer component by diffusing the load transmitted from the road surface. The upper base layer component can withstand the vehicle load from the road surface and further transmit the load downwards. The structure and performance of the polyurethane modified asphalt layer 51 can prevent moisture from eroding the internal structure of the road surface. The polyurethane modified asphalt layer 51 with open-type structure has a high porosity, which can facilitate the downward infiltration and drainage of rainwater. The infiltration groove 52 can collect the infiltrated rainwater, and the infiltration hole 53 can transport the rainwater into the drainage pipe 54. The drainage pipe 54 can transport the rainwater into the drainage ditch 62 through the drainage outlet 63. The protective subgrade 61 can protect the subgrade and prevent the subgrade from collapsing. The drainage ditch 62 can collect the rainwater and discharge it into the sewer pipe. The drainage cover 64 can prevent branches and other debris from falling into the drainage ditch 62 and avoid blockage. When the rainfall is heavy, the water on the surface of the polyurethane modified asphalt layer 51 can quickly flow into the drainage ditch 62 through the drainage hole 65 to avoid water accumulation on the road surface.

[0023] Please see Figures 1-4 In this embodiment, the subbase component includes a soil base 201, a gravel layer 202, and a cement-soil layer 203. The top surface of the subbase 1 is provided with the soil base 201, the top surface of the soil base 201 is provided with the gravel layer 202, and the top surface of the gravel layer 202 is provided with the cement-soil layer 203. By laying the soil base 201, gravel layer 202, and cement-soil layer 203 on the subbase 1, the structure of the roadbed is improved, and the bearing capacity of the roadbed is increased, thereby playing a role in reinforcement and stabilization. By dispersing the load transmitted by the road surface, the pressure on the subbase is distributed, extending the service life of the subbase. The subbase component includes a waterproof layer 301, a crushed stone layer 302, and a cement layer 303. The top surface of the cement-soil layer 203 is provided with the waterproof layer 301, the top surface of the waterproof layer 301 is provided with the crushed stone layer 302, and the top surface of the crushed stone layer 302 is provided with the cement layer 303. The waterproof layer 301 prevents rainwater from seeping into the lower subbase. The permeable layer prevents rainwater from affecting the structure of the subgrade 201, providing protection for the subgrade structure. The crushed stone layer 302 and cement layer 303 provide stable support for the subgrade, facilitating the bearing of large vehicle loads. The upper subgrade components include a permeable oil layer 401, an asphalt concrete layer 402, and an adhesive oil layer 403. The permeable oil layer 401 is set on the top surface of the cement layer 303, the asphalt concrete layer 402 is set on the top surface of the permeable oil layer 401, and the adhesive oil layer 403 is set on the top surface of the asphalt concrete layer 402. The permeable oil layer 401 facilitates the improvement of the adhesion between the cement layer 303 and the asphalt concrete layer 402. The asphalt concrete layer 402 bears the vehicle load from the upper road surface and further transfers the load downwards. The adhesive oil layer 403 facilitates the enhancement of the adhesion between the asphalt concrete layer 402 and the polyurethane modified asphalt layer 51, preventing slippage or separation between the two layers under the influence of environmental factors.

[0024] Please see Figures 1-4In this embodiment, a polyurethane-modified asphalt layer 51 is provided on the top surface of the adhesive layer 403, and a water-permeable groove 52 is provided on the top surface of the asphalt concrete layer 402. Multiple sets of water-permeable grooves 52 are provided, and multiple sets of water-permeable holes 53 are provided on the inner side of the water-permeable grooves 52. The water-permeable holes 53 are interconnected with the water-permeable grooves 52. A drainage pipe 54 is provided inside the asphalt concrete layer 402, and the water-permeable holes 53 are interconnected with the drainage pipe 54. By adopting an open-graded polyurethane-modified asphalt layer 51, the porosity of the road surface is relatively large. When rainfall occurs, rainwater can easily permeate downwards through the gaps between the polyurethane-modified asphalt layers 51. The permeated rainwater is collected by the water-permeable grooves 52 and transported through the water-permeable holes 53 into the drainage pipe 54, thereby preventing water accumulation on the road surface and improving driving safety. A protective roadbed 61 is provided on the side of the asphalt concrete layer 402, and two sets of protective roadbed 61 are provided. The inner side of the drainage ditch 62 is provided with a drainage outlet 63, which is connected to the drainage pipe 54. The protective roadbed 61 is used to protect the roadbed and prevent rainwater erosion from causing the roadbed to collapse. Rainwater that seeps into the drainage pipe 54 is transported to the drainage ditch 62 through the drainage outlet 63 for drainage. The drainage ditch 62 facilitates the collection of rainwater before it is discharged through the sewer pipe. The drainage cover 64 is set on the top surface of the protective roadbed 61. There are two sets of drainage covers 64, which are engaged with the protective roadbed 61. Multiple sets of drainage holes 65 are provided. The drainage covers 64 prevent branches and other debris from falling into the drainage ditch 62, thereby preventing the drainage ditch 62 from becoming blocked. When the rainfall is heavy, some of the rainwater on the surface of the polyurethane modified asphalt layer 51 is discharged through seepage, and the other part of the rainwater flows into the drainage ditch 62 through the drainage holes 65 for discharge, which speeds up the drainage of rainwater and prevents water accumulation on the road surface.

[0025] During the work, the structure of the roadbed is improved by laying soil base 201, sand and gravel layer 202 and cement soil layer 203 on the base course 1, thereby improving the bearing capacity of the roadbed and playing a role in reinforcement and stabilization. By spreading the load transmitted by the road surface, the pressure on the subbase is distributed, and the service life of the base course is extended.

[0026] The waterproof layer 301 prevents rainwater from seeping into the lower subgrade, avoids rainwater from affecting the structure of the soil base 201, and provides protection for the base structure. The crushed stone layer 302 and cement layer 303 provide stable support for the subgrade, making it easier to withstand large vehicle loads.

[0027] The permeable layer 401 facilitates the improvement of the adhesion between the cement layer 303 and the asphalt concrete layer 402. The asphalt concrete layer 402 bears the vehicle load from the upper layer of the road and further transfers the load downwards. The adhesive layer 403 facilitates the enhancement of the adhesion between the asphalt concrete layer 402 and the polyurethane modified asphalt layer 51, preventing the two layers from sliding or separating under the influence of environmental factors.

[0028] The polyurethane modified asphalt layer 51 with an open-graded structure has a large porosity, which allows rainwater to easily seep downwards through the gaps between the polyurethane modified asphalt layers 51 when it rains. The rainwater is collected by the infiltration channel 52 and then transported into the drainage pipe 54 through the infiltration hole 53, thereby avoiding water accumulation on the road surface and improving driving safety.

[0029] The protective roadbed 61 is used to protect the roadbed and prevent rainwater erosion from causing the roadbed to collapse. The rainwater that seeps into the drainage pipe 54 is transported to the drainage ditch 62 through the drainage outlet 63 for drainage. The drainage ditch 62 is used to collect the rainwater and discharge it through the sewer pipe.

[0030] The drainage cover 64 is used to prevent branches and other debris from falling into the drainage ditch 62, thereby avoiding blockage of the drainage ditch 62. When there is heavy rain, some of the rainwater on the surface of the polyurethane modified asphalt layer 51 is discharged through infiltration, and the other part of the rainwater flows into the drainage ditch 62 through the drainage hole 65 for discharge, which speeds up the discharge of rainwater and prevents water accumulation on the road surface.

[0031] Through the above steps, the subbase components enhance the bearing capacity of the roadbed, facilitate the diffusion of loads transmitted from the pavement, reduce the pressure on the upper base components, and provide support for the upper base components. The upper base components bear the vehicle loads from the pavement and further transmit the load downwards. The polyurethane-modified asphalt layer 51 with an open-graded structure results in a higher porosity of the pavement. The structure and properties of the polyurethane-modified asphalt prevent moisture erosion of the pavement's internal structure while allowing rainwater to permeate downwards through the voids between the polyurethane-modified asphalt layers 51. The infiltration channel 52 collects the infiltrated rainwater, and the infiltration holes 53 facilitate the transportation of the rainwater into the drainage pipe 54. The drainage pipe 54 then transports the rainwater through the drainage outlet 63 to the drainage ditch 62. The protective roadbed 61 provides protection for the roadbed to prevent it from collapsing. The drainage ditch 62 collects the rainwater and discharges it into the sewer pipe. The drainage cover 64 prevents branches and other debris from falling into the drainage ditch 62 and causing blockages. When the rainfall is heavy, the water on the surface of the polyurethane modified asphalt layer 51 flows quickly into the drainage ditch 62 through the drainage holes 65, thereby preventing water accumulation on the road surface.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A polyurethane modified bituminous drainage pavement structure comprising a foundation layer (1); characterized in that: The base layer assembly, the lower base layer assembly, the upper base layer assembly, the polyurethane modified asphalt layer (51), the water seepage groove (52), the water seepage hole (53), the drain pipe (54), the protective roadbed (61), the drainage ditch (62), the drainage opening (63), the drainage cover plate (64) and the drainage hole (65) are further included; the top surface of the foundation layer (1) is provided with the base layer assembly, the bottom surface of the base layer assembly is provided with the lower base layer assembly, the top surface of the lower base layer assembly is provided with the upper base layer assembly, the top surface of the upper base layer assembly is provided with the polyurethane modified asphalt layer (51), the top surface of the upper base layer assembly is provided with the water seepage groove (52), the inside of the upper base layer assembly is provided with the water seepage hole (53), the inside of the upper base layer assembly is provided with the drain pipe (54), the top surface of the foundation layer (1) is provided with the protective roadbed (61), the inside of the protective roadbed (61) is provided with the drainage ditch (62), the side surface of the drainage ditch (62) is provided with the drainage opening (63), the top surface of the protective roadbed (61) is provided with the drainage cover plate (64), and the top surface of the drainage cover plate (64) is provided with the drainage hole (65).

2. The polyurethane-modified asphalt drainage pavement structure according to claim 1, characterized in that: The base layer assembly includes the soil layer (201), the gravel layer (202) and the cement soil layer (203); the top surface of the foundation layer (1) is provided with the soil layer (201), the top surface of the soil layer (201) is provided with the gravel layer (202), and the top surface of the gravel layer (202) is provided with the cement soil layer (203).

3. The polyurethane-modified asphalt drainage pavement structure according to claim 2, characterized in that: The lower base layer assembly includes the waterproof layer (301), the gravel layer (302) and the cement layer (303); the top surface of the cement soil layer (203) is provided with the waterproof layer (301), the top surface of the waterproof layer (301) is provided with the gravel layer (302), and the top surface of the gravel layer (302) is provided with the cement layer (303).

4. The polyurethane-modified asphalt drainage pavement structure according to claim 3, characterized in that: The upper base layer assembly includes the oil permeable layer (401), the asphalt concrete layer (402) and the oil sticking layer (403); the top surface of the cement layer (303) is provided with the oil permeable layer (401), the top surface of the oil permeable layer (401) is provided with the asphalt concrete layer (402), and the top surface of the asphalt concrete layer (402) is provided with the oil sticking layer (403).

5. The polyurethane-modified asphalt drainage pavement structure according to claim 4, characterized in that: The top surface of the oil sticking layer (403) is provided with the polyurethane modified asphalt layer (51), the top surface of the asphalt concrete layer (402) is provided with the water seepage groove (52), a plurality of groups of water seepage grooves (52) are provided, the inner side of the water seepage groove (52) is provided with the water seepage hole (53), a plurality of groups of water seepage holes (53) are provided, the water seepage hole (53) and the water seepage groove (52) are mutually penetrated, the inside of the asphalt concrete layer (402) is provided with the drain pipe (54), and the water seepage hole (53) and the drain pipe (54) are mutually penetrated.

6. A polyurethane-modified asphalt pavement drainage structure according to claim 5, characterized in that: The protective roadbed (61) is arranged on the side surface of the asphalt concrete layer (402), the protective roadbed (61) is provided with two groups, the inner side of the drainage ditch (62) is provided with the drainage opening (63), and the drainage opening (63) and the drain pipe (54) are mutually penetrated.

7. The polyurethane-modified asphalt drainage pavement structure according to claim 5, characterized in that: The drainage cover plate (64) is arranged on the top surface of the protective roadbed (61), the drainage cover plate (64) is provided with two groups, the drainage cover plate (64) is clamped and connected with the protective roadbed (61), and a plurality of groups of drainage holes (65) are provided.

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