pavement

Abstract

To provide pavement that prevents flooding of the road surface. [Solution] A pavement having a crushed stone layer and a surface layer on a roadbed, further comprising a rainwater tank below the crushed stone layer for storing water that falls on the surface of the pavement, a permeable sheet between the rainwater tank and the crushed stone layer, a waterproof sheet between the roadbed and the crushed stone layer, and perforated blocks having a height equal to the thickness of the surface layer, each having a base laid on at least a part of the pavement and a cylindrical body with a hole protruding from the base, and pavement material being poured into the open spaces of the surface layer.

Description

Technical Field

[0001] The present invention relates to pavement used for roads, sidewalks, parking lots, parks, etc.

Background Art

[0002] Many of the pavement materials placed on the surface layer and base layer of roads are made of asphalt or concrete. In the pavement constructed in this way, there is a problem that water drainage is poor, so it gets waterlogged even with a little rain. Low-lying areas are particularly prone to waterlogging. In the case of sidewalks, it becomes difficult to walk, and in the case of roadways, it also hinders driving and splashes water on pedestrians, causing inconvenience.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] This application provides a pavement that prevents waterlogging on the road surface.

Means for Solving the Problems

[0005] This application includes: a pavement having a crushed stone layer and a surface layer on a roadbed, a rainwater tank below the crushed stone layer for storing water that has fallen on the surface of the pavement, a water-permeable sheet between the rainwater tank and the crushed stone layer, a water-blocking sheet between the roadbed and the crushed stone layer, further having a perforated block having a height equal to the thickness of the surface layer, the perforated block having a base laid on at least a part of the pavement and a cylindrical body protruding from the base and having holes, a pavement is disclosed in which a pavement material is placed in the empty space of the surface layer. [Brief explanation of the drawing]

[0006] [Figure 1] A cross-sectional view of road 1 according to one embodiment of the present invention is shown. [Figure 2] The perforated block 30 is shown. (a) is a plan view. (b) is a longitudinal section view. [Figure 3] A cross-sectional view of rainwater tank 40 is shown. [Figure 4] An exemplary legged base 41 for use with a rainwater tank 40 is shown. (a) is a perspective view. (b) is a cross-sectional view. [Modes for carrying out the invention]

[0007] Figure 1 shows a cross-sectional view of a road 1 according to one embodiment of the present invention. As shown in the figure, the road 1 has a crushed stone layer 10 and a surface layer 20 as pavement 3 on top of a base course 2. The upper surface of the road 1 is the road surface 4. The road 1 further has perforated blocks 30, a rainwater tank 40, a permeable (protective) sheet 51 and a waterproof sheet 52. As shown in the figure, the road 1 may also have a center line 5 and a U-shaped ditch 6.

[0008] The surface layer 20 is formed of perforated blocks 30 and paving materials such as concrete 60a or asphalt 60b.

[0009] The perforated blocks 30 are laid on top of the crushed stone layer 10, covering at least a portion of the surface layer 20. For example, it is preferable to lay the perforated blocks 30 in a location that covers at least a portion directly above the rainwater tank 40. Therefore, it is not necessary to lay the perforated blocks 30 in a location that does not cover the rainwater tank 40 at all. The height of the perforated blocks 30 is equal to the thickness of the surface layer 20. The perforated blocks 30 can be made of plastic or steel.

[0010] Figure 2 shows a perforated block 30. As shown in the figure, the perforated block 30 has a base 31 and a cylindrical body 32 protruding from the base 31. The cylindrical body 32 has a hole 32a that penetrates in the vertical direction as shown in Figure 2(b). There may be a partition wall 33 connecting the cylindrical bodies 32. There may also be connecting structures 34a,b for connecting the perforated blocks 30 together.

[0011] Concrete 60a is poured into the open space above the base 31 of the perforated block 30, excluding the hole 32a in the cylindrical body 32. In the case of a perforated block 30 made of steel, asphalt 60b can also be poured. It is advisable to pour asphalt 60b in the areas near the center line 5 where perforated blocks 30 were not laid. This prevents holes from forming near the center line 5 where asphalt 60b has been poured, thus minimizing the deterioration of the road's drivability. In other words, the paving material is poured above the base 31 of the perforated block 30 and in the open spaces of the surface layer 20 in the areas where perforated blocks 30 were not laid.

[0012] The permeable sheet 51 is placed between the rainwater tank 40 and the crushed stone layer 10. The impermeable sheet 52 (for example, a rubber sheet) is placed between the roadbed 2 and the crushed stone layer 10. After rainfall, rainwater is stored in the crushed stone layer 10 above the impermeable sheet 52. When the pavement 3 becomes hot due to solar radiation in the summer, water evaporates from the crushed stone layer 10, and the pavement 3 is cooled by latent heat, thus mitigating the heat island effect.

[0013] The rainwater tank 40 stores water that falls on the road surface 4 (the surface of the pavement 3). As shown in Figure 1, the rainwater tank 40 is placed below the crushed stone layer 10, with a permeable sheet 51 in between. The rainwater tank 40 is preferably placed on the shoulder side of the road 1.

[0014] Figure 3 shows a cross-sectional view of the rainwater tank 40. As shown in the figure, the rainwater tank 40 preferably has a void structure (a structure with many gaps) composed of a plurality of pedestals 41 arranged in a lattice pattern (for example, a cubic lattice pattern). Only the pedestals 41 arranged in the left-right, up-down directions are shown, but they can also be arranged in the front-back direction of the paper surface of Figure 3. The number of arrangements is arbitrary in any of the up-down, left-right, and front-back directions. If necessary, joints or the like may be used for fixing.

[0015] The rainwater tank 40 shown in Figure 3 is configured by covering the periphery and bottom of the rainwater tank 40 with, for example, a water-blocking sheet 52. Side walls and a ceiling may be provided on the sides and the top.

[0016] Figure 4 shows an exemplary pedestal 41 used for the rainwater tank 40. If the pedestal 41 is made of lightweight plastic, the rainwater tank 40 can be easily constructed manually.

[0017] As shown in the figure, the pedestal 41 has a base portion 41a and a hollow leg portion 41b that protrudes from the base portion 41a and is closed at the upper end and open at the lower end. The leg portion 41b may have a cylindrical shape with a constant cross-sectional area in the height direction, but may also have a frustum shape that tapers upward as shown in the figure. In the example of the figure, the cross-section of the leg portion 41b is circular, but other shapes such as a polygon may also be used. In the example of the figure, there is one leg portion 41b, but there may also be a plurality.

[0018] On the above road 1, the rainwater that has fallen on the concrete 60a can be discharged from the hole 32a of the cylinder 32 provided in the perforated block 30 to the rainwater tank 40. More specifically, the rainwater that has fallen on the perforated block 30 falls through the hole 32a of the cylinder 32, passes through the crushed stone layer 10, and reaches the water-permeable sheet 51. Then, it falls into the rainwater tank 40 (see Figure 1). The rainwater that has fallen on the asphalt 60b flows in the direction of the perforated block 30, also falls through the hole 32a of the cylinder 32, and finally falls into the rainwater tank 40. Therefore, waterlogging on the road surface 4 can be prevented. The water stored in the rainwater tank 40 can be used as agricultural water, industrial water, domestic water, etc.

[0019] The dimensions, shapes, arrangements, number of steps, materials, etc. of the roads and their elements described in the above embodiments are examples, and other aspects are also possible.

Explanation of Signs

[0020] 1 ··· Road 2 ··· Roadbed 3 ··· Pavement 4 ··· Road surface 5 ··· Center line 6 ··· U-shaped groove 10 ··· Crushed stone layer 20 ··· Surface layer 30 ··· Perforated block 31 ··· Base 32 ··· Cylinder 32a ··· Hole 33 ··· Partition wall 34a,b ··· Connection part 40 ··· Rainwater tank 41 ··· Pedestal 41a ··· Base part 41b ··· Leg part 51 ··· Permeable sheet 52 ··· Waterproof sheet 60a ··· Concrete 60b ··· Asphalt

Claims

1. A pavement having a crushed stone layer and a surface layer on top of the roadbed, A rainwater tank located below the crushed stone layer for collecting water that falls on the surface of the pavement, A permeable sheet between the rainwater tank and the crushed stone layer, A waterproof sheet between the roadbed and the crushed stone layer, The perforated block further comprises a base laid on at least a portion of the pavement and a cylindrical body having a hole protruding from the base, and having a height equal to the thickness of the surface layer, A pavement formed by pouring paving material into the gaps in the aforementioned surface layer.

2. The pavement according to claim 1, wherein the pavement is provided on a road, the rainwater tank is positioned on the shoulder side of the road, the perforated blocks are laid in a location that covers at least a portion directly above the rainwater tank, concrete or asphalt is poured on the base of the perforated blocks, and asphalt is poured in the locations where the perforated blocks are not laid.

Images