TW201912886A - Road structure - Google Patents

Abstract

A road structure is provided and the road structure is laid on a subgrade. The road structure includes a water-holding subbase course, a pervious base course, and a pervious surface course. The water-holding subbase course includes a grade. The grade is laid on the subgrade. The grade is formed by an aggregate sifted from a mix for storing water. The pervious base is laid on the water-holding subbase course to provide a bearing function. The pervious surface course is laid on the pervious base course to provide a friction. When water is above the pervious base course, water will permeate into the pervious base course and the pervious surface course. And then, water is stored in the water-holding subbase course.

Description

Road structure

The present invention provides a road structure, and more particularly a road structure that can store water.

In order to increase the convenience of transportation, road engineering is one of the indispensable basic constructions in a modern city. At the same time, the construction of road projects also seriously affects the convenience and time cost of exchanges between cities and suburbs.

Based on the above considerations, driving safety is also one of the focuses of road structure design. In the prior art, in order to avoid the rain and water on the road and affect the driving safety, the base layer, the bottom layer and the surface layer of the road structure are often laid in a water-impermeable material. The base layer and the bottom layer are made of impervious material to prevent moisture from remaining inside the road and affecting the road capacity. At the same time, the surface layer is also laid with a water-impermeable material to prevent the water on the road surface from infiltrating into the underlying base layer and the bottom layer through the surface layer, causing softening thereof to affect the road bearing capacity.

However, with the recent climate change, frequent short-time heavy rainfall often causes serious water accumulation on the road surface and affects driving safety. Furthermore, with the rise of environmental awareness, the effective use of water resources is also one of the important courses. Xi knows that the road structure method will make the water of the road area drain to the drainage ditch on both sides of the road. This will not only make good use of the effective water source, but as mentioned above, when the rain is timely, the drainage ditch cannot drain in time, which will cause serious water accumulation on the road surface. , causing danger on the road.

Therefore, how to improve the design of the road structure, so that the road engineering can provide effective vehicle carrying capacity, at the same time can quickly remove the road area water, and make good use of this effective water resource, is the inventor of this case and engaged in this related industry. The subject of technology is eager to improve.

In view of the above, the present invention provides a road structure which is laid on a roadbed and comprises: a water retention base layer comprising a gradation layer, which is laid on the roadbed, and the gradation layer is selected from the particle size ratio of the gravel granules. It is used to store water; the permeable bottom layer is laid on the water-retaining base layer to provide load-bearing; and the permeable surface layer is laid on the permeable bottom layer to increase the friction of the road surface. When the water body is on the permeable surface layer, the water body penetrates the water-permeable surface. The layer and the permeable bottom layer are stored in the water retention base layer.

Wherein, the particle size ratio selected by the grading layer comprises C40 or less. Also, the gradation layer is laid to a thickness of 45 cm.

Further, the permeable bottom layer contains permeable concrete, and the permeable concrete has a compressive strength of 210 kgf/cm ² . Moreover, the permeable bottom layer is laid to a thickness of 15 cm.

Furthermore, the permeable surface layer contains porous asphalt concrete to increase the friction and water permeability of the road surface. Moreover, the thickness of the water permeable surface layer is 5 cm.

In addition, the present invention further includes a drainage network tube disposed at intervals in the water retention base layer or the water permeable bottom layer for discharging a portion of the water body to the drainage channel.

Wherein, the drainage network tube comprises an upper half of the drainage opening for discharging part of the water body.

Furthermore, the distance between the drainage network tubes is set between 3 meters and 5 meters.

The detailed features and advantages of the present invention are described in detail in the embodiments of the present invention. The objects and advantages associated with the present invention can be readily understood by those skilled in the art.

Please refer to FIG. 1. FIG. 1 is a schematic view of a road structure of the present invention. The road structure of the present invention is laid on a roadbed 90. The road structure of the present invention comprises a water retaining base layer 10, a water permeable bottom layer 20 and a water permeable surface layer 30. Here, the roadbed 90 preferably has a backfilling system of greater than 95%.

The water-retaining base layer 10 can be generally divided into two layers, the upper layer is the upper base layer, which plays the main bearing role, and the lower layer is the base layer layer, which plays the secondary bearing role. For the purposes of the present invention, the water-retaining base layer 10 comprises a grading layer 11 which is screened from a particle size 12 of a particle size ratio, but the invention is not limited thereto.

Further, the particle size selected by the gradation layer 11 is preferably preferably C40 or less, for example, C40, C30, C20, C10. The grading layer 11 composed of the crushed stone particles 12 under the particle size ratio can not only retain a certain gap but also reserve the water body. At the same time, the gradation layer 11 can provide a considerable load-bearing effect under this particle size ratio. For the purposes of the present invention, the grading layer 11 is primarily laid in a particle size ratio of the crushed stone particles 12 sieved by C40. Since the crushed stone particles 12 will have a gap therebetween, the water body can be stored in the gap. Moreover, when the gradation layer 11 is laid at a thickness of about 45 cm, it can also provide a better load-bearing effect and strength. However, the thickness of the laying here is only an example, and the invention is not limited thereto.

The permeable bottom layer 20 is laid on the water retaining base layer 10, which is also capable of bearing a load, is subjected to stress transmitted by other upper structure, and is dispersed and transferred to the graded crushed stone material 12 of the grading layer 11. Here, the permeable bottom layer 20 comprises a permeable concrete which is permeable to water so that the water bodies of the other superstructure can penetrate the permeable concrete to reach the water retaining base 10 and be stored in the water retaining base 10. Accordingly, the compressive strength of the permeable concrete is 210 kgf/cm ² , but the invention is not limited thereto. In addition, the thickness of the permeable bottom layer 20 is preferably about 15 cm, which also provides better load bearing and strength. However, the thickness of the laying here is only an example, and the invention is not limited thereto.

The permeable surface layer 30 is laid on the permeable bottom layer 20, which directly bears the load of the vehicle and increases the friction of the road surface. Here, the permeable surface layer 30 comprises a porous asphalt concrete which preferably has water permeability. Therefore, in addition to increasing the friction of the road surface, the porous asphalt concrete can make the water body on the road surface penetrate the water permeable surface layer 30 and the water permeable bottom layer 20 through the water permeability thereof, and is stored in the water retaining base layer 10. In addition, the permeable surface layer 30 is preferably laid at a thickness of about 5 cm to provide a better vehicle load and strength. However, the thickness of the laying here is only an example, and the invention is not limited thereto.

Furthermore, between the water permeable surface layer 30 and the water permeable bottom layer 20, a layer of asphalt adhesive layer 40 is preferably further disposed to increase the interface adhesion, so that the water permeable surface layer 30 can be more stable when laid on the water permeable bottom layer 20. .

Please refer to FIG. 2, FIG. 3 and FIG. 4. FIG. 2 is a schematic diagram of an embodiment of a road structure according to the present invention. 3 is a schematic view of another embodiment of a road structure of the present invention. Figure 4 is a plan view of the road structure of the present invention. When the vehicle is traveling on a road, the laying of the permeable surface layer 30 can directly withstand the load of the vehicle. Further, when a water body is left on the water permeable surface layer 30, for example, if there is an immediate heavy rain, too much water body falls directly on the water permeable surface layer 30. Through the water permeability of the permeable surface layer 30 and the permeable bottom layer 20, the water body can be directly infiltrated downward and left to the water retaining base layer 10 to be stored in the water retaining base layer 10.

When the water body stored in the water retaining base layer 10 overflows, in order to prevent the water body in the water retaining base layer 10 from overflowing again onto the water permeable surface layer 30. Accordingly, the present invention further includes a drainage network tube 50 disposed in the water retention base layer 10 or in the water permeable bottom layer 20, or between the water retention base layer 10 and the water permeable bottom layer 20, or under the water retention base layer 10, It is used to discharge part of the water body to the drain 60. Accordingly, the drainage network tube 50 is disposed at a distance of between 3 meters and 5 meters.

Please refer to FIG. 5. FIG. 5 is a schematic view of the drainage network pipe of the present invention. The upper half 52 of the drainage network tube 50 includes an upper half of the drainage opening 51, and through the upper half of the drainage opening 51, the overflowing water body flows into the drainage network tube 50 through the upper half of the drainage opening 51, and then The lower half 53 of the drain pipe 50 flows to the drain 60. Accordingly, the water body in the water retaining base layer 10 is maintained at a fixed amount of water.

For example, when the drainage network pipe 50 is buried, the opening of the upper half of the drainage opening 51 is located at the upper end, so that the position of the upper half of the drainage opening 51 is located at the top or side of the drainage network pipe 50 (the upper half of the drainage network pipe 50) Part 52). Therefore, when the drainage network pipe 50 is located between the water retention base layer 10 and the water permeable bottom layer 20, if the water body overflows beyond the water retention base layer 10 and floods the drainage network pipe 50, the overflow water body will flow into the drainage network pipe 50 through the upper half drainage opening 51. It is used to adjust the amount of water in the water retaining base layer 10.

Furthermore, when the water body falls on the water permeable surface layer 30, the water body will penetrate directly into the water retaining base layer 10 through the water permeability of the water permeable surface layer 30 and the water permeable bottom layer 20. If the infiltrated water body is just above the drainage network pipe 50, part of the water body will flow directly into the drainage network pipe 50 via the upper drainage opening 51 located in the upper half of the drainage network pipe 50. Instead of the water body above the drainage network tube 50, it will continue to penetrate into the water retention base layer 10 and be stored in the water retention base layer 10.

Through the water permeability of the permeable bottom layer and the permeable surface layer, the water body can penetrate into the bottom of the road surface, and then the water body can be stored therein through the water-retaining base layer. At the same time, when the stored water body evaporates, it can also be used to adjust the temperature of the permeable surface layer and increase the service life of the road. In addition, the water-retaining base layer is a gradation layer composed of a certain particle size ratio of the crushed stone particles, in addition to the water body, and has a certain bearing capacity and strength. Solve the problem of knowing the road immersion and loss of bearing capacity and strength.

Although the technical content of the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any modifications and refinements made by those skilled in the art without departing from the spirit of the present invention are encompassed by the present invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

10‧‧‧Water retention base

11‧‧‧ leveling

12‧‧‧ Gravel pellets

20‧‧‧Water permeable bottom layer

30‧‧‧ permeable surface

40‧‧‧asphalt adhesive layer

50‧‧‧Drainage network tube

51‧‧‧Draining holes

52‧‧‧ upper half

53‧‧‧ Lower half

60‧‧‧drain

90‧‧‧ Luke

[Fig. 1] A schematic view of a road structure of the present invention. Fig. 2 is a schematic view showing an embodiment of a road structure of the present invention. Fig. 3 is a schematic view showing another embodiment of the road structure of the present invention. Fig. 4 is a plan view showing the road structure of the present invention. Fig. 5 is a schematic view showing a drainage network pipe of the present invention.

Claims (10)

A road structure is laid on a road base and comprises: a water retaining base layer comprising a first layer of a layer, which is laid on the roadbed, the layer is selected from a particle size ratio and a gravel pellet is used for a water-permeable bottom layer is disposed on the water-retaining base layer for providing a load-bearing base layer; and a water-permeable surface layer is disposed on the water-permeable bottom layer for increasing a road surface friction force when the water body is located on the water-permeable surface When the layer is on the layer, the water body penetrates the water permeable surface layer and the water permeable bottom layer and is stored in the water retention base layer. The road structure of claim 1, wherein the particle size ratio selected by the grading layer comprises C40 or less. The road structure of claim 1, wherein one of the grading layers is laid to a thickness of 45 cm. The road structure according to claim 1, wherein the permeable bottom layer comprises a water permeable concrete, and one of the permeable concrete has a compressive strength of 210 kgf/cm ² . The road structure according to claim 1, wherein one of the permeable bottom layers is laid to a thickness of 15 cm. The road structure according to claim 1, wherein the permeable surface layer comprises a porous concrete layer for increasing the friction of the road surface and a water permeability. The road structure according to claim 1, wherein one of the water permeable surface layers is laid to a thickness of 5 cm. The road structure according to claim 1, further comprising a drainage network pipe disposed at intervals in the water retention base layer or the water permeable bottom layer for discharging part of the water body to a drainage ditch. The road structure of claim 8, wherein the drainage network tube includes an upper half drainage opening for discharging a portion of the water body. The road structure according to claim 8, wherein one of the drainage network tubes is disposed at a distance of between 3 meters and 5 meters.