WO2010001480A1

WO2010001480A1 - Pavement structure

Info

Publication number: WO2010001480A1
Application number: PCT/JP2008/062185
Authority: WO
Inventors: 裕並木; 一郎高橋; 智広内池; 豪辻井; 直幸小栗; 萬大福田
Original assignee: 大成ロテック株式会社
Priority date: 2008-07-04
Filing date: 2008-07-04
Publication date: 2010-01-07

Abstract

Provided is a pavement structure having a wide freedom for material selection and excellent maintainability. The pavement structure (1) comprises mainly a pavement body layer (2) forming a surface layer and a water supply device (3). The pavement body layer (2) is positioned nearest a ground surface side, and formed, for example, by spreading pavement blocks (20) having water-holding property. The pavement body layer (2) has slits opening to the pavement surface (2a). In this preferred embodiment, joints (25) between the pavement blocks (20) function as slits. A water supply tape (31) is a water supply means for supplying water to the pavement body layer (2), and buried in each of the joints (25).

Description

Pavement structure

The present invention relates to a pavement structure provided with a water supply function for suppressing the temperature rise of the pavement.

In recent years, the so-called "heat island phenomenon" in which the temperature in the urban area is higher than that in the surrounding area has become a problem. One of the causes is the heat storage effect of asphalt pavement, and in order to suppress the heat storage (temperature rise) of asphalt pavement, development of a pavement structure provided with a water supply function is being carried out.
For example, Patent Literature 1 discloses a pavement system in which water is automatically supplied from a water supply pipe (irrigation pipe) buried in the lower part of the pavement block, and the temperature rise of the pavement block is suppressed by the heat of vaporization.
Reference (2) also discloses a water-retentive pavement structure that has a water-retention layer on the pavement surface side and a water-supply layer below it, and can supply water from a water supply pipe embedded in the water-supply layer. There is.
(1) JP-A-2006-161343 (2) JP-A-2004-353399

However, in the paving structure with the conventional water supply function, since the water supply pipe is embedded in the lower part of the paving body, it is necessary to use a paving material excellent in the ability to soak up water, and there is room for material selection. It was restricted.
Moreover, in the pavement structure provided with the conventional water supply function, when abnormality generate | occur | produced in the water supply pipe, it was necessary to peel off the pavement body of the upper part and to perform maintenance. Therefore, there was a problem that maintenance takes time and cost.

The present invention has been made in view of such problems, and has an object to provide a pavement structure having a wide choice of materials and excellent in maintainability.

The pavement structure according to the present invention is characterized by comprising a pavement layer having a slit opened to the pavement surface, and water supply means installed in the slit.

According to this configuration, since the water supply means is installed in the slit provided in the pavement layer, the distance between the water supply means and the pavement layer is short. Therefore, since the material which can not soak up water can be used rather than before, the range of material selection will be expanded.

Moreover, since the water supply means is installed in the slit opened to the pavement surface, maintenance of the water supply means can be performed from the said opening part. Therefore, it is not necessary to peel off the pavement layer at the time of maintenance of the water supply means, and the time and cost of maintenance can be reduced.

In addition, the water supply means includes a water supply tape, and the water supply tape overlaps the other edge of one elongated plate member with the other edge of the other elongated plate. The end portion of the first end portion is fixed to the one end portion so as to be hollow, and the other end portion which is the outer side is penetrated in a portion where the one end portion and the other end portion overlap. It is preferable to have the discharge part formed.

According to this configuration, when the water flowing through the inside of the hollow water supply tape is discharged from the discharge portion formed at the other edge which is the outer side, the one edge which is disposed on the inner side The water pressure inside the water supply tape is difficult to reduce. Therefore, the water pressure is unlikely to decrease even at a position away from the water supply source, and water can be stably supplied over the entire length of the water supply tape.

Moreover, it is preferable that the said discharge part is a slit-shaped groove | channel.
According to this configuration, the slit-like groove is opened by the water pressure and the water is discharged, so the water pressure inside the water supply tape does not easily decrease. Therefore, water can be stably supplied over the entire length of the water supply tape.

Preferably, a pressure reducing device is provided between the one edge and the other edge.
According to this configuration, it is possible to reliably discharge water from the discharge portion while maintaining the water pressure inside the water supply tape high by the pressure reducing device. Therefore, water can be stably supplied over the entire length of the water supply tape.

The decompression device is preferably a plurality of weirs formed on the outer surface of the one edge or the inner surface of the other edge.
According to this configuration, since the pressure reducing action occurs when the water deforms the weir, the pressure reducing device can be configured with a simple configuration. Therefore, the manufacturing cost of the water supply tape can be reduced. Moreover, since it is a simple structure, it is hard to be damaged and maintenance cost can be reduced.

The water supply means of the present invention preferably comprises any one or a combination of a water supply tape, a water supply pipe, a groove-like member having an open top, or the like.
According to this configuration, water can be suitably distributed in the slit.

The pavement layer of the present invention is composed of a plurality of pavement blocks, and the slit is preferably a joint between pavement blocks.
According to this configuration, since the joint portion between the plurality of pavement blocks can be used as a slit, the formation of the slit and the installation of the water supply means are easy.

The pavement layer of the present invention preferably has water retention. In addition, the paving block preferably has water retention.
According to this configuration, for example, since the pavement layer formed of pavement blocks etc. has water retention, water supplied from the water supply means in the slit is retained in the pavement layer. Therefore, the cooling action can be sustained for a long time.

According to the present invention, it is possible to provide a paving structure having a wide choice of materials and excellent in maintainability.

It is a top view of the pavement structure concerning this embodiment. It is sectional drawing of the pavement structure which concerns on this embodiment. It is a perspective view which shows a water supply means, (a) is a water supply tape, (b) has each shown the water supply pipe. It is a perspective view of another water supply pipe. It is drawing which shows the modification of a water supply means.

Explanation of sign

DESCRIPTION OF SYMBOLS 1 Pavement structure 2 Pavement layer 2a Pavement surface 3 Water supply apparatus 4 Support layer 5 Water barrier layer 6 Roadbed 20 Pavement block 21 Aggregate 23 Water retention grout 25 Joint 27 Sand 31 Water supply tape (water supply means)

BEST MODE FOR CARRYING OUT THE INVENTION Best modes for carrying out the present invention will be described in detail with reference to the drawings. In the present embodiment, the case where a paving block is used as the paving body layer will be described as an example. In the description, the same elements will be denoted by the same reference signs and redundant description will be omitted.

FIG. 1 is a plan view of a pavement structure according to the present embodiment. FIG. 2 is a cross-sectional view of the pavement structure according to the present embodiment.
As shown to FIG. 1, FIG. 2, the pavement structure 1 which concerns on this embodiment comprises what is called a road, and is mainly provided with the pavement layer 2 used as a surface layer, and the water supply apparatus 3. As shown in FIG. The pavement structure 1 has a layered structure, and includes a pavement layer 2, a support layer 4, an impermeable layer 5, and a roadbed 6 in this order from the pavement surface (see FIG. 2). In addition, the application object of the pavement structure 1 may be, for example, a promenade, an open space, a parking lot, a building periphery, a rooftop, etc. as well as the sidewalk and the roadway.

The pavement layer 2 is a layer located closest to the ground surface, and is formed, for example, by laying a plurality of pavement blocks 20 having water retention capacity. The pavement layer 2 has a slit that opens to the pavement surface 2a. In the present embodiment, joints 25 of adjacent pavement blocks 20 function as slits.

As shown in FIG. 1, the pavement block 20 is a member that receives a treading pressure of an automobile, a pedestrian, or the like, and is formed of, for example, a flat plate block having a rectangular shape. The pavement blocks 20 are, for example, arranged in parallel along the extension direction of the road, and arranged alternately (staggeredly) in the width direction of the road. Joints 25 are formed between adjacent pavement blocks 20. The joint 25 is filled with sand 27 so that the pavement block 20 does not move (see FIG. 2). And the water supply tape 31 of the water supply apparatus 3 is embed | buried under a part of joint 25 parallel to the extension direction of a road.

As shown in FIG. 2, the paving block 20 includes, for example, a plurality of aggregates 21 and a water retaining grout 23 filled in the gaps between the aggregates 21. The material, the particle size, the coarse particle ratio, the open particle size, and the like are selected and adjusted so that the aggregate 21 can exhibit desired strength. The water retention grout 23 is a grout material having water retention, and is constituted, for example, by containing a mineral or resin having water retention in a normal grout material composed of cement and water. The water holding grout 23 mainly holds water supplied from the water supply tape 31 and rain water that has rained on the pavement surface 2 a. The pavement block 20 can be appropriately selected and used from known pavement blocks.

As shown in FIG. 2, the support layer 4 is a layer that supports the pavement layer 2 from below, and is made of, for example, sand (fine aggregate) having a predetermined particle diameter.
The water blocking layer 5 is provided between the support layer 4 and the roadbed 6 to prevent the water from flowing out of the support layer 4 to the roadbed 6. The water blocking layer 5 is made of, for example, a water blocking sheet. Water which can not be retained by the pavement layer 2 and the support layer 4 flows along the water impermeable layer 5 along the gradient and is drained.
The roadbed 6 is a layer that plays the role of dispersing the load from the support layer 4 and transmitting it to the roadbed (not shown).

As shown in FIG. 1, the water supply apparatus 3 mainly includes a water supply tape 31 which is a water supply means, a water storage tank 32 and a connecting pipe 33 which connects these.

The water supply tape 31 is a water supply means for supplying water to the pavement layer 2, and is buried in the joint 25 (see FIG. 2). The water supply tape 31 is disposed at predetermined intervals in the width direction of the road and along the extension direction of the road. A connection pipe 33 is connected to each water supply tape 31, and water is supplied from the water storage tank 32 via the connection pipe 33.

FIG. 3 is a perspective view showing a water supply means, in which (a) shows a water supply tape and (b) shows a water supply pipe.
When the water does not flow inside, the water supply tape 31 has a cross-sectional shape that is elongated and crushed as shown in FIG. Is a member whose cross-sectional shape becomes circular. In the present embodiment, as shown in FIG. 2, the water supply tape 31 is installed in the narrow joint 25 so that it does not have a perfect circular shape even when water flows, and the cross-sectional shape is elongated to some extent Water is flowing in a crushed condition.

As shown to Fig.3 (a), the water supply tape 31 is a hollow member made from resin, and water flows through the hollow part 31a. The water supply tape 31 is hollow, for example, by overlapping one edge 31c and the other edge 31d of one elongated plate-like member and welding the lower end 31d1 of the other edge 31d which is the outer side. Is formed. The water supply tape 31 has a slit (cut) -like groove 31b penetrating the other edge 31d to be the outside, in the vicinity of the widthwise central portion of the overlapping portion of the one edge 31c and the other edge 31d. doing. The slit-like grooves 31 b are connected to, for example, a pressure reducing device described later, and are formed at intervals of several tens of centimeters in the longitudinal direction of the water supply tape 31. The shape of the slit-like groove 31b is not particularly limited, and may be formed into any shape.

For example, a plurality of weirs (a device that provides resistance when water flows) is formed on the inner peripheral surface of the hollow portion 31a (for example, the outer surface of one edge 31c) between the slit-like grooves 31b. It is a decompression device that decompresses the water pressure of the water supplied by a pump described later. The water flowing through the hollow portion 31a enters between the one edge 31c and the other edge 31b, and after being decompressed by the decompression device, is discharged from the slit-like groove 31b to the outside. Therefore, regardless of the distance from the pump, a fixed amount of water can be discharged from each slit-like groove 31b.

In addition, the water supply means of this embodiment is not restricted to the water supply tape 31, For example, as shown in FIG.3 (b), you may use the water supply pipe 131 which exhibits a circular cross section.
The water supply pipe 131 has a hollow portion 131a through which water flows, and a plurality of through holes 131b communicating the hollow portion 131a with the outer peripheral portion. The through holes 131 b are, for example, formed in a circular shape, and two through holes 131 b are provided at predetermined intervals. The water supply pipe 131 is formed of a flexible material (for example, rubber), and can be installed in the joint 25 by deforming into a slender oval even when the diameter is larger than the joint 25 of the pavement layer 2 It has become.

As shown in FIG. 1, the water storage tank 32 is a tank for storing water to be supplied to the water supply tape 31, and can store, for example, rain water. A connection pipe 33 is connected to the water storage tank 32.

The connection pipe 33 is a pipe that connects the water supply tape 31 and the water storage tank 32, and is embedded below the pavement layer 2 along the cross direction of the road. The connection pipe 33 is made of, for example, a vinyl chloride pipe having a diameter larger than that of the water supply tape 31 so as not to be easily closed. The connecting pipe 33 is embedded below the pavement layer 2, but its extension is short, so that the area where the pavement layer 2 is peeled off can be minimized even if maintenance is necessary.

Although not shown, the water supply device 3 includes a sensor for measuring the amount of solar radiation, a pump for delivering water in the water storage tank 32 to the water supply tape 31, a control device for controlling the pump based on signals from the sensor, It also has a power supply, etc. As a power supply device, it is preferable to use, for example, a solar power generator.

FIG. 4 is a perspective view showing another water supply pipe. FIG. 5 is a view showing a modification of the water supply means.
In the present embodiment, the water supply tape 31 is used as the water supply means. However, as shown in FIG. 4, for example, a resin water supply pipe 31A having a circular cross section may be installed. The water supply pipe 31A has a circular cross section regardless of the flow of water in the hollow portion 31Aa, and has a plurality of through holes 31Ab. Sand 27 is filled around the water supply pipe 31A.
As shown to Fig.5 (a), the water supply pipe 31A is installed in the joint 25 of the pavement layer 2 with circular cross-sectional shape.

Moreover, as shown in FIG.5 (b), it may change to the water supply tape 31, and you may install the grooved member 31B which the upper part opened. In such a case, the water overflowing from the upper opening of the grooved member 31 B is supplied to the pavement layer 2. Therefore, water can be supplied above the pavement layer 2. The grooved member 31B may be made of, for example, metal, or may be formed by bending a water-impervious sheet into a groove shape. In addition, the inside of the grooved member 31B may be filled with sand.

Further, as shown in FIG. 5 (c), the water supply tape 31 may be installed in the grooved member 31B. In this way, the water supplied from the water supply tape 31 is less likely to flow out to the support layer 4, and water can be effectively supplied to the pavement layer 2.

It continues and demonstrates the effect | action of the pavement structure 1 which concerns on this embodiment.
According to the pavement structure 1 according to the present embodiment, the water supplied from the water supply tape 31 is sucked up by the water retaining grout 23 of the pavement block 20 and rises to the pavement surface 2 a. Then, in the process of the water rising to the pavement surface 2a becoming steam, the heat of the pavement layer 2 is taken away as heat of vaporization, and the temperature rise of the pavement layer 2 is suppressed.

At this time, since the water supply tape 31 is installed in the joint 25 which is a slit of the pavement layer 2, the pavement layer 2 only needs to suck water from the joint 25. Therefore, in comparison with the conventional pavement structure which has been sucked from the support layer 4, the suction distance is shortened, and it is possible to use a material having low water absorbability. Also, it is possible to use a material with low water absorption for the support layer 4. Therefore, the range of material selection of the pavement layer 2 and the support layer 4 is expanded. Moreover, since high water absorbency is not required, even if the water absorbency of the pavement layer 2 is reduced by aged deterioration, a high temperature reduction effect can be exhibited.

In addition, when maintenance (for example, replacement etc.) of the water supply tape 31 becomes necessary due to some cause, the water supply tape 31 can be taken out from between the joints 25 and maintenance can be performed. Therefore, there is almost no need to peel off the pavement layer 2 and maintenance is easy.

Here, when replacing the water supply tape 31, first, the water supply tape 31 in the joint 25 is gripped and pulled up to take out the water supply tape 31 from the joint 25. At this time, most of the sand 27 filled in the joint 25 is discharged out of the joint 25 together with the water supply tape 31. In order to make it easy to insert a new water supply tape 31 into the joint 25, the sand 27 in the joint 25 may be removed using an air blowing device or the like. Moreover, when holding the water supply tape 31, it is good to remove only one paving block 20, for example.

Then, the water supply tape 31 is replaced, a new water supply tape 31 is installed in the original joint 25, and the sand 27 is filled. Thereby, maintenance of the water supply tape 31 can be performed, without removing the pavement block 20 almost.
In addition, deterioration of the water supply tape 31 can be easily prevented by taking out and storing the water supply tape 31 from the joint 25 in the winter season when the heat island measure is unnecessary. Thereby, the useful life of the water supply tape 31 can be extended.

As mentioned above, although the best embodiment for carrying out the present invention was described in detail with reference to drawings, the present invention is not limited to these embodiments, and can be suitably selected in the range which does not deviate from the main point of invention. It goes without saying that changes are possible.

For example, in the present embodiment, the pavement layer 2 is configured by laying a plurality of pavement blocks 20, but the configuration of the pavement layer 2 is not limited to this. For example, the pavement layer 2 may be a water-retentive asphalt pavement, or, more specifically, may be a conventional asphalt pavement or concrete pavement having no water-retention capacity. In this case, the water supply tape 31 or the like can be installed in the slit by forming a slit in the pavement using an asphalt cutter or the like. Alternatively, the slit may be formed by embedding a thin plate or the like at the time of placing the pavement and removing the thin plate after hardening.

Further, in the present embodiment, the water supply tape 31 is installed in parallel to the extension direction of the road, but the installation direction of the water supply tape 31 is not particularly limited. For example, water supply pipes at equal intervals in the direction orthogonal to the road May be installed.

Further, the method of fixing the end of the other edge of the water supply tape 31 and the one edge may be, for example, welding or bonding.
In the embodiment, the slit-shaped groove 31b is described as an example of the discharge portion formed at the other edge of the water supply tape 31, but the present invention is not limited to this, and water can be discharged. As long as it is configured, any hole or cut may be used.
Further, in the present embodiment, in the water supply tape 31, the case where a plurality of ridges are formed on the outer surface of one edge portion is described as an example, but a plurality of ridges are formed on the inner surface of the other edge portion. The pressure reducing device may be configured.
In the present embodiment, although a plurality of weirs have been described as an example of the pressure reducing device, the pressure reducing device may be any device as long as it can provide resistance when water exits from the slit-like groove, for example, one edge A non-woven fabric or a woven fabric may be disposed between the portion and the other edge.

Claims

A pavement structure comprising a pavement layer having a slit opening on a pavement surface, and water supply means installed in the slit.
The water supply means comprises a water supply tape,
The water supply tape is formed by overlapping one edge and the other edge of one elongated plate-like member, and fixing the end of the other edge, which is the outside, to the one edge. Formed in the shape of
The discharge part formed penetrating the said other edge which becomes an outer side is provided in the part which the said one edge and the said other edge overlapped, It is characterized by the above-mentioned. Pavement structure described in.
The pavement structure according to claim 2, wherein the discharge part is a slit-like groove.
The pavement structure according to claim 2, further comprising a pressure reducing device between the one edge and the other edge.
The pavement structure according to claim 4, wherein the decompression device is a plurality of weirs formed on the outer surface of the one edge or the inner surface of the other edge.
The pavement structure according to claim 1, wherein the water supply means comprises any one or a combination of a water supply tape, a water supply pipe, a groove-like member having an open top, or a combination thereof.
The pavement structure according to claim 1, wherein the pavement layer is composed of a plurality of pavement blocks, and the slit is a joint between pavement blocks.
The pavement structure according to claim 1, wherein the pavement layer has water retention.
The pavement structure according to claim 7, wherein the pavement block has a water retention property.