JP2007051463A - Road-surface cooling road structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a road-surface cooling road structure which can maintain the effect of suppressing a rise in the temperature of a road surface associated with a heat island phenomenon, and can ease the flooding of a road even in concentrated torrential rainfall. <P>SOLUTION: This road-surface cooling road structure comprises a roadbed 1, and a pavement layer 3 which is installed on the roadbed. The pavement layer 3 comprises a waterproof sheet 4 for being laid on the roadbed 1, a lattice-shaped water storage section 5 which is composed of impervious and heat-resistant FRP and installed on the waterproof sheet 4, and a permeable asphalt layer 6 which is infilled into the water storage section 5 and covers the water storage section 5. The lattice-shaped water storage section 5 serves as a water storage basin 7 each cell of which is rectangularly formed in a plan view. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to road structures such as ordinary roads and sidewalks on which vehicles and the like travel, or shopping streets, building streets, and living roads around buildings, and more particularly to road surface cooling road structures designed to take measures against heat island phenomenon and torrential rain. .

  There are asphalt pavement and cement concrete pavement on roads where ordinary vehicles run, and in the former asphalt pavement, a roadbed is laid on the roadbed, and asphalt mixture is further laid on the surface. In the latter cement concrete pavement, a concrete board is formed on the roadbed. Side grooves are provided on the side of the road for draining rainwater that falls on the road surface or flows on the road surface.

  On the other hand, on roads other than ordinary roads, such as sidewalks, it is known that permeable concrete blocks that allow rainwater to permeate are laid on the roadbed or the roadbed on the roadbed. It has penetrated underground. In addition, on road surfaces such as roads and sidewalks, water is sprayed or sprinkled in order to provide a refreshing feeling with old customs or to prevent dust from standing.

  In recent years, with the global warming, in particular, the remarkable heat island phenomenon, there is a demand for a technique for suppressing the temperature rise on the road surface. In a road structure with a side ditch, rainwater quickly flows into the side ditch, so that the drainage of the road surface is good, but the temperature rise suppression effect due to evaporation of the water on the road surface can be expected only during the rain. The same applies to watering and watering. Also, in a road structure in which rainwater, water hitting, water sprinkling, etc. (rain water including water hitting or water sprinkling, etc., hereinafter simply referred to as rain water) penetrates underground, the roadbed and roadbed exhibit water storage functions to some extent. Although a certain temperature rise suppression effect can be expected, the temperature rise suppression effect is hardly sustained.

  In recent years, flooding due to heavy rain has often occurred. During the rain, in the former type of road structure, rainwater flows into the gutter from the road surface and drains as described above, but there is a limit to drainage from the gutter. It overflows and the road becomes flooded. Moreover, even in the latter type of road structure, since rainwater gradually permeates, rainwater cannot easily permeate underground, resulting in a situation where the flooded state continues for a long time.

  The object of the present invention is to maintain the effect of suppressing the temperature rise of the road surface for a long period of time, and also to allow the rainwater to pass through quickly and to store it in places other than the side grooves even in the case of torrential rain. It is another object of the present invention to provide a road surface cooling road structure in which the durability of the asphalt layer is improved when the pavement layer is an asphalt layer.

  The first invention comprises a road bed and a pavement layer that is filled with a water storage material, and is composed of a large number of water reservoirs in which rainwater or the like is stored in the filled water storage material, and has a water storage portion installed on the road floor. It is a road surface cooling road structure.

In the present invention, as the roadbed, a material obtained by leveling and solidifying the same ground as the conventional roadbed can be used, and a waterproof sheet may be laid on the roadbed as necessary.
As the water storage material, for example, water-permeable asphalt or concrete block, steel slag, gravel, sand and other fibrous materials, glass wool and other simple substances, or a mixture thereof can be used.
It is preferable that the reservoirs are connected so that adjacent ones are in contact with each other and cover the entire road bed without any gaps.

  The water reservoir may be bottomless if a waterproof sheet is laid on the road floor, but preferably has a bottom with good water storage. From the viewpoint of water storage, the material is preferably impermeable or hardly permeable, and more preferably heat resistant. Examples of these include iron, resin, FRP, and concrete.

  When the reservoir is made of iron, resin, FRP, etc., the cross-sectional shape of the side wall is preferably T, I or hollow. As a result, the rigidity of the reservoir is increased, the strength is improved, and, as will be described later, when the water storage part has a water permeable or water impermeable asphalt layer or concrete layer, the asphalt layer or concrete layer is worn out. Even if the reservoir is exposed, the wide side wall top surface makes it difficult for pedestrians, traveling bicycles, vehicles, etc. It is possible to prevent the vehicle from traveling.

  Each reservoir also has a shape in plan view, for example, a rectangle (see FIG. 1), or a hexagonal shape that has a honeycomb shape as a whole. An eggplant is preferred.

  The pavement layer is a water-permeable asphalt layer on the reservoir when the reservoir material filled in the reservoir is, for example, a single substance or a mixture of powders such as steel slag, gravel, sand, or glass wool. Or it has a concrete layer, a concrete block, etc., or has a water-impermeable asphalt layer and a concrete layer which formed many through-holes which let rain water etc. pass. These water-permeable asphalt layers, concrete layers, concrete blocks, or impervious asphalt layers, concrete layers, concrete blocks, etc. that have through-holes to pass rainwater, etc. are filled with water storage tanks. It is also desirable to lay them on the reservoir.

  According to a second aspect of the present invention, in the road surface cooling road structure of the first aspect of the invention, the reservoir is bottomed and water-proof and has an opening at an appropriate height, or a groove is formed at the upper edge of the reservoir. The road cooling road structure has a water-permeable asphalt layer or concrete layer, a concrete block or the like on the water storage part, or has a water-impermeable asphalt layer or concrete layer in which a large number of through holes for passing rainwater or the like are formed.

  According to a third aspect of the present invention, there is provided a water storage tank used in the road surface cooling road structure according to the first or second aspect of the present invention, a rectangular frame, preferably a bottomed rectangular frame, and a water-permeable It is a single water storage panel composed of a water storage material made of asphalt, concrete, steel slag, fine particles such as gravel or sand, fiber material such as glass wool, or a mixture thereof.

  According to 1st invention, rain water etc. osmose | permeate the water storage material of each water tank, and are stored. When the pavement layer is heated by the irradiation of sunlight, the water stored in the water storage material in the water storage part is vaporized, and the temperature rise on the road surface can be suppressed by the heat of vaporization taken away when vaporized.

  Also, if the reservoir is made into a bottomed shape, rainwater etc. can be reliably stored in each reservoir, and more than the saturated storage volume of the reservoir material can be stored, which has the effect of suppressing the temperature rise of the pavement layer. Can last for hours. In addition, when the pavement layer is asphalt, it tends to be deformed by spiked tires and chains when the vehicle is running, and in summer when the daytime temperature rises, depressions and swells are likely to occur due to vehicle running. By providing, the above-mentioned deformation of the pavement layer can be prevented and the durability can be improved.

  From the above, the present invention is particularly effective when the pavement layer is made of asphalt, and the water storage tank also has heat resistance in order to exhibit the function of preventing deformation of the pavement layer when the temperature of the pavement layer rises. Preferably it is.

  According to the second invention, when the pavement layer is made of asphalt, the reservoir reaches the surface, and the storage level of rainwater stored in the reservoir reaches the near surface of the asphalt. However, when the asphalt is compressed as the vehicle travels, rainwater or the like oozes out from the surface, making it easy to collect water. In this regard, if an opening is provided in the reservoir or a groove is provided at the upper edge thereof, water will be discharged from it, so that even if the height of the reservoir is kept high, the water storage level in the reservoir is increased. It can be lowered and it can be made difficult to make a puddle.

  According to the third aspect of the invention, the road surface cooling road structure of the sixth aspect of the invention can be easily obtained by laying panels on the road floor, and even if worn out due to vehicle running, only the worn part of the panel is replaced. The road can be repaired easily and inexpensively.

  FIG. 1 is a schematic view schematically showing a road surface cooling road structure according to an embodiment of the present invention. A pavement layer 3 is provided on a concrete roadbed 1, and the pavement layer 3 is made of a waterproof sheet 4 laid on the roadbed 1, and an FRP having water shielding and heat resistance installed on the waterproof sheet 4. The grid-shaped water storage unit 5 and the water-permeable asphalt layer 6 that fills the water storage unit 5 and covers the water storage unit 5, each of which has a rectangular shape in plan view. It becomes a water reservoir 7 and is preferably fixed to the roadbed 1 through a waterproof sheet by fastening means such as a nail.

  FIG. 2 is a cross-sectional view of the road structure. Rainwater or water hitting or sprinkling on the surface of the asphalt layer 6 penetrates the asphalt layer 6 and is stored or stored in each reservoir. When the asphalt layer 6 is heated and dried by the irradiation of sunlight, the heat of the road surface can be suppressed by the heat of vaporization when the water stored or stored in the water reservoir 7 evaporates, and the heat island phenomenon Can be relaxed.

  In addition, since the grid-shaped water storage section 5 made of FRP is provided inside the asphalt layer 6, the water storage section 5 is reinforced as compared with the case where the water storage section 5 is not provided. Deformation can be prevented, and unevenness such as wrinkles can be prevented from being formed on the road surface. The asphalt layer 6 is particularly effective for preventing deformation by the heat-resistant water storage section 5 because it softens and deforms easily when exposed to hot weather in summer.

  FIG. 3 shows another aspect of the road surface cooling road structure, in which each water reservoir is filled with a water storage material 9 made of vermiculite as a material having a higher water storage capacity than asphalt. Thereby, compared with the road structure shown in FIG. 2, more water can be stored in the water storage tank for a longer period of time, so that the effect of suppressing the temperature rise on the road surface can be maintained for a longer time.

  FIG. 4 shows still another aspect of the road surface cooling road structure. The road structure shown in FIG. 3 is different from the road structure shown in FIG. 3 in that the side walls constituting each reservoir 7 are raised until they reach near the surface of the asphalt layer 6. The opening 11 is formed in the middle part.

  According to the road structure of this embodiment, by increasing the height of each bottomed container, it is possible to further prevent deformation of the asphalt layer 6 that is a pavement layer, and the water level stored in each reservoir 7 Since the asphalt layer 6 is compressed by running of the vehicle, water can be prevented from oozing out and the water can be prevented from being accumulated.

  FIG. 5 shows another embodiment of the water storage tank, which is composed of a box-shaped frame 13 and a unit 15 composed of a water storage material made of asphalt 14 or vermicierite filled in the frame 13. When constructing a road, the asphalt is laid on the road floor and then can be used as it is without laying the asphalt.

  According to the unit of the present embodiment, even if a part of the unit 15 laid on the road floor may be worn out, it is possible to easily repair the road by replacing only the worn portion and paving on the worn portion. be able to.

Sectional drawing of the road surface cooling road structure by 1st Embodiment. Sectional drawing of the said road structure. Sectional drawing of the road structure. Sectional drawing of the road surface cooling road structure by another embodiment. The partial cross section perspective view of a unit.

Explanation of symbols

1. ・ Roadbed 3 ・ Pavement layer 4 ・ Waterproof sheet 5 ・ Water storage 6 ・ Asphalt layer 7 ・ Water storage tank 9 ・ Water storage material 11 ・ Opening 13 ・ Frame 14 ・ Asphalt

Claims (3)

  A road surface cooling road structure comprising a road bed, a plurality of water storage tanks filled with water storage material, and rainwater and the like stored in the water storage material, and provided with a pavement layer having a water storage portion installed on the road floor.   The reservoir is bottomed and water-proof, and has an opening at an appropriate height, or a groove is formed at the upper edge of the reservoir, and a permeable asphalt layer or concrete layer, concrete block, etc. on the reservoir The road surface cooling road structure according to claim 1, further comprising an impervious asphalt layer or a concrete layer formed with a plurality of through holes through which rainwater or the like passes.   The reservoir is a rectangular frame, and water-permeable asphalt or concrete filled in the frame, or a granular material such as steel slag, gravel or sand, or a fibrous material such as glass wool, or a mixture thereof. The road surface cooling road structure according to claim 1 or 2, wherein the road surface cooling road structure is a single water storage panel made of a water storage material.

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