JP4638551B1 - Road structure and construction method - Google Patents

Abstract

[PROBLEMS] To provide a road structure that can sufficiently withstand the passage of heavy objects and that can sufficiently suppress the temperature rise of the road and its surrounding environment, and a construction method thereof.
A paved road as a road structure is provided with a water permeable layer so as to cover an underground water pipe laid on a soil layer as a base layer, on which a heat ray that absorbs heat rays is provided. A ceramic layer as an absorption layer is further provided. The underground water pipe is a corrugated pipe made of metal, has high rigidity, is highly resistant to side pressure applied to the pipe wall, has excellent flexibility, and is A plurality of holes extending through the pipe wall are extended in the pipe wall of the water pipe.
[Selection] Figure 1

Description

  The present disclosure relates to a road structure (including a road structure, a road structure, a pavement structure, a pavement structure, and a structure such as a structure, a building, and a building according to a road), and a method (manufacturing method) thereof.

  As part of measures to prevent global warming, including the response to the heat island phenomenon, various methods have been tried to prevent, for example, high temperatures on paved roads due to intense sunlight in summer. ing. For example, Non-Patent Document 1 proposes a thermal barrier pavement in which a thermal barrier coating layer is provided on an asphalt pavement surface, and the thermal barrier coating layer includes hollow ceramic particles. It is made of a special pigment rich in heat reflection, and reflects the near-infrared light of sunlight with high efficiency to prevent heat storage on the pavement and suppress the increase in road surface temperature. Is described to be about 90%.

“Heat Island, Cool Island Heat Island Countermeasures Thermal Insulating Pavement Pavement technology that reduces infrared road surface temperature by reflecting infrared rays”, Katsuaki Muraoka, Environmental Purification Technology, Vol. 8 (2), pp. 29-32

  On the other hand, a plastic water pipe having a water leak hole (opening) on the side wall is buried in the ground, and a water permeable layer made of a water permeable material is provided as a paved road material thereon, and the water pipe leaks out. Attempts have also been made to lower the temperature of paved roads by evaporating water into the air through the water-permeable layer and using the heat of vaporization of water at that time.

  However, in such a road structure in which plastic water pipes are buried, the water pipes should be placed as close to the ground as possible (near the road surface) from the viewpoint of promoting the supply of water to the road surface. Although it is desirable, the pipe wall of the water pipe cannot resist the lateral pressure (compression force) applied from a heavy object such as a vehicle passing on the road, and in some cases, the water pipe may be damaged. There is much room for improvement from the viewpoint of versatility, and the current situation is that it has not yet been put to practical use.

  On the other hand, as described above, the heat-shielding pavement described in Non-Patent Document 1 suppresses an increase in road surface temperature by preventing heat storage on the pavement surface using a heat-shielding coat layer. According to the inventor's knowledge, the temperature suppression effect greatly depends on the material and thickness of the heat-shielding pavement material used, and sufficient thickness must be prepared to obtain a sufficient effect, which is economically effective. However, it turned out to be still insufficient. Moreover, since the radiant heat reflected by the road is released to the surrounding environment, the effect is still insufficient from the viewpoint of sufficiently suppressing not only the road temperature but also the surrounding temperature (air temperature). It is recalled.

  Therefore, a road structure that can sufficiently withstand the passage of heavy objects and that can sufficiently obtain the effect of suppressing the temperature rise of the road and the surrounding environment, and a construction method (manufacturing method) thereof are desired.

  In order to solve the above problems, a road structure according to the present disclosure includes a water permeable layer formed on a base layer (for example, a layer on which a road structure is provided, such as soil (layer) or a geological layer), and a metal. And a water supply pipe (for example, a metal perforated corrugated pipe) embedded in the base layer and / or the water-permeable layer, at least partially having a corrugated shape, having a plurality of holes formed in the side wall.

  In the road structure configured as described above, for example, when water is supplied (water supply, supply) to a water pipe embedded in the base layer and / or the water permeable layer, when the water flows inside the water pipe, Sunlight that leaks to the outside through a plurality of holes formed in the pipe wall (sends and discharges) and penetrates into the water permeable layer, and if the water permeable layer is provided on or near the road surface, sunlight incident on the road Water evaporates due to the heat of the air, and the air around the road and its surroundings (around) can be cooled by the heat of vaporization. At this time, if the water pipe is made of metal, for example, compared to a conventional plastic water pipe, it has excellent rigidity and high resistance to side pressure, so that heavy objects such as vehicles pass on the road. However, the inconvenience that the shape is deformed or damaged due to the compressive force is suppressed. In addition, when at least a part or all of the water pipe is a corrugated pipe, for example, since the portion is excellent in flexibility (bendability), the water pipe can be easily routed and installed in any desired form. There are advantages.

  Moreover, in order to supply the water inject | poured into the inside of a water pipe more reliably to a water permeable layer, the hole formed in the pipe wall of a water pipe may be open | released toward the water permeable layer.

  Alternatively, the road structure according to the present disclosure includes a water permeable layer formed on the base layer, a plurality of holes formed in the side wall, and a water supply pipe embedded in the base layer and / or the water permeable layer. And a heat ray absorbing layer formed thereon. In this case, the water permeable layer and the heat ray absorbing layer may be formed integrally or separately, and may further have another water permeable layer.

  Even in such a configuration, for example, when water is supplied (water supply, water flow, supply) to a water supply pipe embedded in the base layer and / or the water permeable layer, when the water flows inside the water supply pipe, the pipe wall If the water permeable layer leaks out (sends and discharges) from the plurality of holes formed in the water and penetrates the water permeable layer and the water permeable layer is provided on or near the road surface, the heat of sunlight incident on the road Water evaporates and the heat of vaporization cools the road and the surrounding air. At this time, if a heat ray absorbing layer is formed on the water permeable layer, for example, the heat ray absorbing layer does not reflect sunlight, and actively absorbs heat due to irradiation of sunlight, The amount of heat input / the amount of heat stored on the road surface can be increased as compared with the case where no heat ray absorbing layer is provided. As a result, the amount of evaporation (vaporization amount) of the water that has permeated the permeable layer is increased, so that the total amount of heat of evaporation removed by the water can be increased. As a result, the road and the surrounding environment can be further increased. Can be cooled. Further, in this case, as described above, if the water pipe is made of metal, its rigidity and side pressure resistance can be increased. Therefore, even if a heavy object such as a vehicle passes on the road, the shape is caused by the compressive force. Can be prevented from being deformed or damaged. In addition, as described above, if at least a part or all of the water supply pipe is a corrugated pipe, for example, the flexibility (foldability) of the portion can be improved, so the water supply pipe can be routed to any arbitrary form. Easy to install.

  Further, for example, the water pipe is open at both ends, and at least one of the both ends is an inlet, and at least one of the plurality of holes formed in the side wall of the water pipe. The part may have a larger area of holes formed in a part farther from the water inlet than an area of holes formed in a part closer to the water inlet.

  Generally, as the distance from the water inlet increases, the pressure loss (pressure loss) of the water (fluid) that flows inside the water supply pipe occurs, and the delivery pressure decreases. When such pressure loss occurs, the water pipe Even if the holes provided in the pipe wall have the same area (for example, the same hole diameter), the amount of water discharged from the hole formed in the part farther from the water inlet is the hole formed in the part closer to the water inlet. It tends to be less than the amount of water discharged from the water. On the other hand, with the above-described configuration, at least a part of the plurality of holes formed in the side wall of the water pipe is located at a position farther from the water inlet than the area of the hole formed in a part near the water inlet. Since the area of the formed hole is increased, the amount of water discharged from the hole to the outside can be increased even if the pressure loss of the discharged water occurs in a portion farther from the water inlet. As a result, it becomes easy to equalize the amount of water that is sent to the permeable layer side and permeates into the permeable layer regardless of the location of the water pipe.

  In addition, from the above, the road structure according to the present disclosure includes, for example, a water permeable layer formed on a base layer and a metal, and at least a part thereof has a corrugated shape, and a plurality of holes are formed on a side wall. And a water supply pipe embedded in the base layer and / or the water permeable layer, and a heat ray absorbing layer formed on the water permeable layer. The water supply pipe is open at both ends, and both ends thereof At least one of the open ends is a water inlet, and at least a part of the plurality of holes formed in the side wall of the water pipe is more than the area of the hole formed in a portion closer to the water inlet. The area of the hole formed in the farther part may be enlarged.

  In addition, the road structure construction method (manufacturing method) according to the present disclosure includes a water permeable layer formed on a base layer, made of metal, at least part of which has a corrugated shape, and a plurality of holes formed in a side wall. The water pipe is embedded in the base layer and / or the water permeable layer. Specifically, for example, the base layer is exposed (exposed), a water pipe is laid on the base layer, and a material constituting the water permeable layer is laminated thereon, with or without fixing the water pipe appropriately. The road surface may be leveled appropriately.

  Alternatively, in the road structure construction method according to the present disclosure, a water permeable layer is formed on a base layer, and a water pipe having a plurality of holes formed on a side wall is embedded in the base layer and / or the water permeable layer, and a heat ray is formed on the water permeable layer. An absorption layer is formed. Specifically, for example, the base layer is exposed (exposed), a water pipe is laid on the base layer, and a material constituting the water permeable layer is laminated thereon, with or without fixing the water pipe appropriately. Furthermore, a road surface may be defined by laying a tile or ceramic material on which the heat ray absorbing layer is mixed or coated on the water permeable layer.

  In these cases, the water pipe is open at both ends, and at least one of the two ends is a water inlet, and at least some of the plurality of holes formed in the side wall of the water pipe are You may form so that the area of the hole formed in the part farther from the water inlet may be larger than the area of the hole formed in the part closer to the water inlet.

  In addition, from the above, the road structure construction method according to the present disclosure includes, for example, a water permeable layer formed on a base layer, made of metal, at least part of which has a corrugated shape, and a plurality of holes in a side wall. The formed water pipe is embedded in the base layer and / or the water permeable layer, a heat-absorbing layer is formed on the water permeable layer, and both ends are opened as the water pipe, and at least one of these both ends The open end is a water inlet, and at least some of the plurality of holes formed in the side wall of the water pipe are formed in a part farther from the water inlet than the area of the hole formed in a part closer to the water inlet. You may use a thing with a large area of a hole.

It is a schematic sectional drawing which shows typically the section of one embodiment of the road structure by this indication. It is a top view which shows typically the underground water pipe used for one embodiment of the road structure by this indication.

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios in the drawings are not limited to the illustrated ratios. The following embodiments are examples for explaining the present disclosure, and are not intended to limit the present disclosure only to the embodiments. Furthermore, the present disclosure can be variously modified without departing from the gist thereof.

  FIG. 1 is a schematic cross-sectional view schematically showing a cross-section (a cross-section along a vertical direction, a vertical cross-section) of an embodiment of a road structure according to the present disclosure, and FIG. 2 is an underground water pipe used for the road structure. FIG. 3 is a top view (plan view) schematically showing 3 (described later). In addition, the underground water supply pipe 3 is a metal corrugated pipe as described later, and has a cylindrical shape. In FIG. 2, a half-circumferential portion of the upper surface of the pipe wall is displayed.

  The paved road 1 (road structure) is provided with a permeable layer 4 so as to cover an underground water pipe 3 (water pipe) laid on a soil layer 2 (base layer). Is provided with a ceramic layer 5 (heat ray absorbing layer) having a characteristic of absorbing near infrared rays as heat rays.

  For the convenience of illustration, the underground water supply pipe 3 is shown as a cylindrical tube with a flat tube wall in the extending direction, but in this embodiment, for example, a corrugate formed of metal such as SUS material. Since it is a pipe and is made of metal, it is more rigid than plastic pipes made of resin, etc., and has higher resistance to side pressure applied to the pipe wall, and it is also less than ordinary simple tubular pipes. Thus, it has a characteristic that it is excellent in flexibility (bendability).

  In addition, the “corrugated shape” means that the pipe wall of the underground water pipe 3 is not flat, for example, the surface is formed in a wrinkled or bellows shape having irregularities, or the pipe wall is corrugated. The shape of a normal corrugated tube is shown, and a plurality of convex portions (mountain portions) and concave portions (valley portions) may be independent from each other, or may be continuous spirally. That is, the underground water supply pipe 3 may be a lantern-shaped waved tube or a spiral waved tube, and the entire tube wall may be a corrugated shape, or only a part of the tube wall (for example, a bent portion). ) May be a partially waved tube processed into a corrugated shape. In addition, the underground water pipe 3 is, for example, depending on the soil (soil layer 2) used, in order to prevent deterioration due to the entry of soil into the water pipe hole (holes H1 to H4 and the like described later), A multiple tube having a double tube structure may be used. In this case, for example, the outermost tube (outer tube) may be a metal corrugated tube, and other tubes may be formed on the tube wall, for example. It may be a non-metallic pipe (for example, a plastic pipe or a rubber pipe formed from a resin or the like) in which a hole larger than the hole diameter opened in the metal corrugated pipe is formed.

  In addition, a plurality of holes H1 to H4 penetrating the pipe wall are drilled or split along the extending direction of the underground water supply pipe 3 on the pipe wall of the underground water supply pipe 3. The water pipe 3 is mounted on the soil layer 2 so that the site | part in which those holes H1-H4 were formed contact | connects the water permeable layer 4 side. Furthermore, the underground water pipe 3 is open at both ends, and one end (water inlet) is connected to the water supply source S via an appropriate water pipe or the like. Furthermore, the plurality of holes H1 to H4 are formed such that the hole diameter (opening diameter) gradually increases from the open end connected to the water supply source S toward the other end (terminal) side. In addition, as the water supply source S, the water supply pump etc. in which water supply (water supply performance), such as a water pressure and a water supply amount, was designed suitably are mentioned, for example.

  The method for forming the underground water pipe 3 which is a metal corrugated pipe having such a structure is not particularly limited. For example, holes H1 to H4 are previously drilled at predetermined positions of a metal (plate) strip. The strip material with holes is continuously processed while being processed into a corrugated shape by, for example, roll forming processing (processing to form a long product with the same cross-sectional shape from a strip material by a large number of forming rolls arranged in a row). In addition, for example, a technique of joining the edges and forming a tubular shape by laser welding using a YAG laser or a carbon dioxide gas laser, electric welding such as TIG welding, or the like can be given.

  More specifically, the underground water transmission pipe 3 is made of SUS304, the pipe diameter (outer diameter) is about several tens mm, the thickness of the pipe wall is about several mm, and the holes H1 to H4 have a hole diameter. Can be illustrated in which holes having a diameter of about 0.1 mm to 1 mm are formed along the extending direction of the underground water pipe 3. The corrugated pitch of the underground water pipe 3 and other properties / shapes can be appropriately selected according to the use environment and application.

  Further, the material of the water permeable layer 4 is not particularly limited, and examples thereof include natural soil and artificial soil used as an all-weather pavement, and more specifically, an anod formed by pulverizing debris fired at a high temperature. Examples include TUKA (for example, a clay obtained by baking a clay added with an appropriate additive at a high temperature and crushed and pulverized into fine particles), pumice, and an appropriate water-permeable ceramic material.

  Furthermore, the material for the ceramic layer 5 for absorbing heat rays is not particularly limited as long as it can absorb heat rays contained in sunlight effectively and store heat, unlike the conventional heat-shielding pavement. For example, a material in which a heat-absorbing material such as heat-absorbing glass (infrared-absorbing glass or near-infrared-absorbing glass) used for known heat insulation applications is filled or mixed in an appropriate ceramic material for paving is provided in a layered manner It is done. Alternatively, in addition to or instead of such ceramic materials, heat ray absorbing films (infrared cut filter resin, near infrared cut filter resin) used for known heat insulation applications are laminated with a topcoat material that is resistant to friction. Can also be used as the ceramic layer 5.

  As a construction method for obtaining the paved road 1, for example, after the soil layer 2 is exposed (exposed) and leveled, the underground water pipe 3 is laid on the ground so as to have a predetermined shape, The material constituting the water permeable layer 4 is laminated on the underground water pipe 3 with or without fixing as appropriate, and the material constituting the ceramic layer 5 is further laminated thereon, and the surface (road surface). For example, the procedure may be as follows.

  According to the paved road 1 and the construction method thus configured, water W is passed from the water supply source S toward the underground water pipe 3 embedded between the soil layer 2 and the permeable layer 4. Then, the water W flows into the underground water pipe 3 from one end of the underground water pipe 3 (a water inlet that is an open end connected to the water supply source S), and is pumped toward the other end (terminal). Is done. At that time, the water W leaks to the outside through a plurality of holes H1 to H4 formed in the pipe wall of the underground water transmission pipe 3, and the leaked water W penetrates into the permeable layer 4, and further the permeable layer. 4 reaches the ceramic layer 5. At this time, the ceramic layer 5 receives the heat rays of sunlight and accumulates (heats) the heat, and the temperature rises. Therefore, the water W that has reached the ceramic layer 5 is accumulated in the ceramic layer 5. As a result, the surface of the paved road and its surrounding environment can be cooled using the heat of vaporization. Therefore, it becomes possible to sufficiently suppress the temperature rise and the temperature rise of the paved road 1 and its surrounding environment, which can contribute to global warming countermeasures.

  In this way, the construction of the paved road 1 is essentially different from the conventional thermal barrier pavement provided with the thermal barrier coating layer, and the conventional thermal barrier coating layer reflects the heat rays to increase the temperature of the road. On the other hand, the paved road 1 absorbs the heat rays of sunlight and actively uses the amount of heat for evaporation of the water W (evaporation latent heat, vaporization latent heat). By further increasing the evaporation amount (vaporization amount), the temperature of the paved road 1 and the temperature (air temperature) of the surrounding environment can be further reduced.

  Moreover, since the underground water pipe 3 is made of metal, it is more rigid and has a higher resistance to side pressure than conventional plastic water pipes. Therefore, heavy objects such as vehicles pass on the paved road 1. Even so, it is possible to prevent the underground water pipe 3 from being deformed or damaged due to the compressive force. Furthermore, at least a part or all of the underground water supply pipe 3 is a corrugated pipe, and the portion of the underground water supply pipe 3 is excellent in flexibility (bendability). It becomes easy to be installed in the form of. As a result, the structure of the paved road 1 can be easily constructed regardless of the installation location of various terrain and the size of the installation location, and the versatility can be greatly improved.

  Furthermore, the hole diameters (opening diameters) of the holes H1 to H4 formed in the underground water supply pipe 3 are sequentially enlarged from one end side (water inlet) to which water is supplied toward the terminal side (drain port). That is, since the opening area is sequentially increased, even if a pressure loss of the pumped water W occurs in a part farther from the water inlet, the hole (for example, hole H4) formed in the part is externally provided. It is possible to prevent a decrease in the amount of water discharged into the water. This makes it easy to equalize the amount of water that is sent to the water permeable layer 4 side and permeates the water permeable layer 4 regardless of the site in the extending direction of the underground water pipe 3. The evaporation amount of the water W can be made uniform over the entire paved road 1 laid, and as a result, local temperature rises in the underground water pipe 3 and its surrounding environment can be easily suppressed.

  Note that, as described above, the present disclosure is not limited to each of the above-described embodiments, and various modifications can be made as appropriate so far as long as the gist thereof is not changed. Further, for example, the ceramic layer 5 may not be provided on the paved road 1, the water permeable layer 4 and the ceramic layer 5 may be integrally formed, and the water permeable layer 4 may have a laminated structure including a plurality of layers. Furthermore, the underground water pipe 3 may be embedded in either the soil layer 2 or the water permeable layer 4. Furthermore, in the drawing (FIG. 1), the boundaries of the layers are clearly shown, but the boundaries do not necessarily have to be clearly distinguished. Furthermore, the underground water pipe 3 may be cylindrical or rectangular. In addition, a discharge pump may be connected to the terminal side of the underground water pipe 3. Moreover, the opening shape of hole H1-H4 may not be circular, for example, an elliptical shape or a rectangular shape may be sufficient, or a slit shape may be sufficient. Further, as shown in the figure, the holes H1 to H4 may not all have the same size, and the holes H1 to H4 may or may not be provided at regular intervals. Furthermore, although the paved road 1 is particularly useful as a road structure through which heavy objects such as vehicles pass, the structure is not necessarily limited to application only to the road, and the temperature of the surrounding environment due to the radiant heat of sunlight. If it is a use which needs to suppress a raise, it is also possible to apply to various usage forms.

  As described above, according to the road structure and its construction method (manufacturing method) of the present disclosure, it can sufficiently withstand the passage of heavy objects, and sufficiently suppress the temperature rise of the road and its surrounding environment. Therefore, it can be widely used for various roads, buildings such as outdoor facilities, and structures such as buildings.

  DESCRIPTION OF SYMBOLS 1 ... Paved road (road structure), 2 ... Soil layer (base layer), 3 ... Underground water pipe (water pipe), 4 ... Water-permeable layer, 5 ... Ceramic layer (heat ray absorption layer), H1-H4 ... Hole, S ... water supply, W ... water.

Claims (10)

A water permeable layer formed on the base layer;
A water supply pipe made of metal, at least partially having a corrugated shape, having a plurality of holes formed in the side wall, and embedded in the base layer and / or the water permeable layer,
A heat-absorbing layer formed on the water-permeable layer;
With
The water pipe is open at both ends, and at least one of the open ends is a water inlet.
At least some of the plurality of holes formed in the side wall of the water pipe have a larger area of holes formed in a part farther from the water inlet than the area of holes formed in a part near the water inlet. ,
Road structure. A water permeable layer formed on the base layer;
A water supply pipe made of metal, at least partially having a corrugated shape, having a plurality of holes formed in the side wall, and embedded in the base layer and / or the water permeable layer,
A heat-absorbing layer formed on the water-permeable layer;
Comprising
Road structure. The water pipe is open at both ends, and at least one of the open ends is a water inlet.
At least some of the plurality of holes formed in the side wall of the water supply pipe have a larger area of holes formed in a part farther from the water inlet than the area of the hole formed in a part closer to the water inlet. ,
The road structure according to claim 2. A water permeable layer formed on the base layer;
A plurality of holes are formed in the side wall, and a water pipe embedded in the base layer and / or the water permeable layer,
A heat-absorbing layer formed on the water-permeable layer;
Comprising
Road structure. The water pipe is open at both ends, and at least one of the open ends is a water inlet.
At least some of the plurality of holes formed in the side wall of the water supply pipe have a larger area of holes formed in a part farther from the water inlet than the area of the hole formed in a part closer to the water inlet. ,
The road structure according to claim 4. Forming a water permeable layer on the base layer,
A water pipe made of metal, at least partially having a corrugated shape, and having a plurality of holes formed in the side wall, is embedded in the base layer and / or the water permeable layer,
Forming a heat ray absorbing layer on the water permeable layer,
The water pipe is open at both ends, and at least one of the open ends is a water inlet.
At least some of the plurality of holes formed in the side wall of the water pipe have a larger area of holes formed in a part farther from the water inlet than the area of holes formed in a part near the water inlet. ,
Road structure construction method. Forming a water permeable layer on the base layer,
Embedded in the base layer and / or the water permeable layer, which is made of metal, at least part of which has a corrugated shape and in which a plurality of holes are formed in the side wall,
Forming a heat ray absorbing layer on the water permeable layer,
Road structure construction method. The water pipe is open at both ends, and at least one of the open ends is a water inlet.
At least some of the plurality of holes formed in the side wall of the water supply pipe have a larger area of holes formed in a part farther from the water inlet than the area of the hole formed in a part closer to the water inlet. ,
The construction method of the road structure of Claim 7. Forming a water permeable layer on the base layer,
A water pipe having a plurality of holes formed in a side wall is embedded in the base layer and / or the water permeable layer,
Forming a heat-absorbing layer on the water-permeable layer;
Road structure construction method. The water pipe is open at both ends, and at least one of the open ends is a water inlet.
At least some of the plurality of holes formed in the side wall of the water pipe have a larger area of holes formed in a part farther from the water inlet than the area of holes formed in a part near the water inlet. ,
The road structure construction method according to claim 9.

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