JPH11269808A - Wettable paving system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize rainwater stored in a side ditch while supplying water in a dry season, and to stop water absorption to the road surface side by simple works in a cold season, etc. SOLUTION: The wettable paving system has a permeable paving material forming a paved surface and having a water absorption function, a side ditch 6 which is arranged at the edge section of the paving material and through which rainwater is passed, and a water-conveyance member 3a connecting a part of water in the side ditch 6 to the paving material in a manner that water can be flowed by a capillary phenomenon, and a conduit 12 supplying water at the time of a dry season is joined into the side ditch 6 while a return pipe 18 bypassing water to the outside of the side ditch at the time of swelling and an overflow pipe are conjoined. Either of the wetting or drying of a road surface can be selected by lifting or lowering or detaching in the water- conveyance member 3a dipped in water in the side ditch 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet permeable pavement system having a function of making a pavement surface wet in a permeable pavement, preventing the pavement surface from drying, and suppressing a rise in surface temperature.

[0002]

2. Description of the Related Art In recent years, in view of the adverse effects of impermeable pavement,
Water-permeable pavements are being promoted to promote the penetration of rainwater and the communication of air to foster street trees, reduce the burden on sewers, prevent flooding of urban rivers, and recharge groundwater.

However, in this water-permeable pavement, since the water retention of the pavement material typified by the water-permeable asphalt and the water-permeable pavement block is extremely small, the absorbed rainwater immediately becomes dry with a short period of solar radiation, The surface temperature rises. In other words, after rainfall, rainwater penetrates into the ground, but since the moisture is not retained near the pavement surface, the pavement surface tends to dry quickly, and because there is no evaporative function like soil and vegetation, After drying, the thermal characteristics remain the same as those of non-permeable pavement. In summer, the high temperature of the pavement surface makes people uncomfortable, and in winter, it causes the city to dry.

[0004] The applicant of the present invention first guides the water in the gutter provided on the shoulder of the permeable pavement to the permeable pavement, maintains the wettability of the road surface with the water, and uses the latent heat of evaporation to clean the road surface. A method of cooling was proposed.

FIG. 9 shows the pavement system.
1 is a subgrade, 2 is a subgrade laid on the upper part of the subgrade 1,
A water-absorbing sheet 3 made of a nonwoven fabric or the like is laid on the roadbed 2, and a water-permeable pavement material 5 is laid on the water-absorbing sheet 3 via a sand layer 4 to form a road surface.

[0006] A side groove 6 having a U-shaped cross section is provided along the shoulder of the above paved road, and is closed by a lid such as a water permeable lid 7. Of the side groove 6 protrudes, and this hanging lower end is immersed in the inner bottom surface of the side groove 6 as the water guide member 3a.

Therefore, according to this system, when there is rain on the road surface, the rainwater permeates underground through the pavement material 5-sand layer 4-water-absorbing material 3-base-bed 2-subgrade 1. A part of the rainwater is stored in the gutter 6 from the pavement surface through the lid 7, and excessive water is drained to a culvert or the like.

When the road surface and its lower layer are in a dry state, a part of the rainwater collected in the side gutter 6 is transferred to the water guiding member 3.
a, and diffuses horizontally over the entire surface of the water-absorbing sheet 3 located on the roadbed 2 by capillary action. Further, the diffused water keeps the road surface in a wet state through the sand layer 4 and the pavement material 5, and at the same time, spreads from the road surface by solar radiation or the like. It evaporates sequentially and the road surface is cooled by the latent heat of evaporation.

Therefore, according to this system, the temperature of the ground surface can be suppressed to about 30 ° C. even when the normal dry pavement surface is close to 60 ° C., for example, in summer, and the rainwater In order to take part of the natural circulation, the equipment cost etc. may be inexpensive, and by applying this wet pavement system to places where people gather such as sidewalks, open spaces, parks, event venues, leisure land, etc. The reflection and radiant heat can be reduced, temperature rise on the ground surface is suppressed, and a comfortable environment can be obtained.

[0010]

However, the side grooves 6
Even if a rainwater storage function is provided, the shape is elongated along the road shoulder, so it is not possible to secure a sufficient capacity. And the cooling effect by the latent heat of evaporation cannot be obtained.

[0011] Further, in winter or the like, if the road surface is moistened, there is a possibility of freezing. In this case, the risk of deformation of the road surface due to frost heaving and the risk of ice burn increase.

The present invention has been made to solve the above problems, and basically utilizes rainwater stored in a gutter and provides a wet pavement capable of supplying a shortage during a drought period. System.

[0013] Further, the present invention, in the severe winter and the like,
Another object is to stop water absorption on the road surface side by a simple operation.

[0014]

In order to achieve the above object, a wet pavement system according to the present invention comprises a permeable pavement forming a road surface, and a gutter disposed at an edge of the pavement and through which rainwater flows. And a water guide member that connects a part of the water in the gutter so as to be able to flow to the pavement material by capillary action, and connects a water guide pipe that supplies water at the time of drought to the inside of the gutter, A bypass pipe for bypassing the water to the outside of the gutter at the time of increasing the water is connected.
In the present invention, “water permeability” includes the property of pumping water from below to above by capillary action.

Therefore, in the present invention, the basic form is to wet the road surface using the rainwater stored in the gutter, and during the drought season, the water can be supplied to the gutter to continue the wetting. In the period, water accumulated in the gutter can be prevented from overflowing from the gutter by bypassing to the supply source and the culvert.

It is preferable that the water guide member has a side edge of a water-absorbent sheet laid on the lower surface of the water-permeable pavement material with a sand layer interposed therebetween in the side groove.

Further, since the lower end of the water-absorbent sheet is held below or above the water surface, it is possible to select whether or not the road surface is moistened by a simple operation.

Further, since the lower end portion of the water absorbing sheet in the side groove is detachably attached to the edge of the water absorbing sheet in the sand layer, the lower end portion of the water absorbing sheet can be clogged simultaneously with the selection of whether or not the road surface is wet. If it happens, it can be easily replaced.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the accompanying drawings. In each embodiment, the same parts as those in the related art shown in FIG. 9 are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts or newly added parts will be described using new reference numerals.

FIGS. 1 and 2 show a first embodiment of the present invention. In the figure, a rod 10 also serving as a weight is added to the lower end of the water guide member 3a, while an L-shaped rod receiver 12 is fixedly arranged above the inner side of the side groove 6.

At the time of road surface drying, FIG.
As shown in the figure, the rod 10 is immersed in the inner bottom surface of the side groove 6,
Water is absorbed from here, and as described above, horizontal diffusion and wetting of the road surface are attempted to reduce the temperature of the road surface due to evaporation, and when the moistening is unnecessary, the lid 7 is opened and the rod 1 is opened.
By locking 0 to the rod receiver 12, the water guide member 3a is isolated from the reference water surface WL, so that water is not absorbed.

The former case (a) is performed mainly when the road surface temperature rises or the road surface becomes dry, mainly in summer. Also, in the case of the latter (b),
It is implemented at times when there is a risk of road surface freezing.

The side groove 6 has an appropriate length in accordance with the wetted length of the road surface, and has a function of storing rainwater taken in through the lid 7. In addition, a water pipe 14 is connected to an upper portion of one end of the side groove 6, and the water in the water storage tank 16 is introduced in a state where the rainwater is depleted and the inside of the side groove 6 is lowered from the reference water level WL. A return pipe 18 is connected to the lower side of the side groove 6 so as to bypass overflowed water into the tank 16. When the water level exceeds the reference water level WL, a bypass valve 20 provided in the return pipe 18 is opened to open the tank 16. It is designed to circulate inside.

The control for water supply can be automatically performed by the water level sensor 22 and the control device 24 disposed in the gutter 6, and when the detected value of the water level sensor 22 falls below the reference water level WL, the control device is controlled. 24, the pump 26 is driven to supply the water stored in the tank 16 into the side groove 6, and when the water exceeds the reference water level WL, the valve 20 is turned on.
Is opened to return the surplus water into the tank 16, whereby the inside of the side groove 6 is always maintained at the reference water level WL.

In addition to the above, in addition to storing the collected rainwater in the tank 16, it is desirable that the tank 16 be connected to a water source such as a water supply system or a central water supply system so that the shortage can be constantly compensated.

Further, an overflow pipe 28 is connected to the other end of the side groove 6, and when the water level in the side groove 6 greatly exceeds the reference water level WL due to heavy rain or the like, overflow water is passed through the overflow pipe 28 to a culvert (not shown). To prevent overflow from the side groove 6.

Therefore, in the above configuration, when rainwater stays in the gutter 6, it is utilized as it is, and surplus water is collected in the tank 16 so that it can be used at all times. When a large amount of rainwater enters the gutter 6 due to, for example, the water is taken into the tank 16 or discharged into a culvert.

At the time of drought, the reference water level WL is maintained by supplying the water in the tank 16 into the gutter 6.
In order to maintain the water-absorbing action and to keep the road surface wet and cool, and to keep the road surface dry in a cold season, it is only necessary to pull up the water guide member 3a from the interface.

FIGS. 4 and 5 show a second embodiment according to the present invention. In the figure, a crankshaft 30 is interposed between the water-absorbing sheet 3 and a water guide member 3a on the side edge thereof, and both ends of the crankshaft 30 are supported on both longitudinal ends of the side groove 6.

A crank handle 32 is integrated with one of the shaft ends of the crank shaft 30. As shown by a solid line in the figure, the crank handle 32 is moved from a state where the water guide member 3a is immersed in water. Is rotated by 90 °, the water guide member 3a moves away from the water surface and is positioned substantially horizontally as shown by the broken line (it may be completely horizontal),
It is held in this position. Therefore, in the present embodiment, the operation for making the road surface non-wetting can be performed more easily.

In the present embodiment, the water immersion member 3a is made of a hard material, or both ends in the longitudinal direction of the water conveyance member 3a are supported by support bars or the like, so that the above-described immersion can be achieved.
One of two non-immersion positions can be selected and positioned.

FIGS. 5 and 6 show a third embodiment according to the present invention. In the figure, a side edge of a water absorbing material 3 and a water guiding member 3a of the same material are cut off, and are detachably connected by fasteners 40 and 42 having an uneven cross section.

In the above configuration, the water guide member 3a is particularly easily clogged with mud mixed with water in the side groove 6, so that a plurality of water guide members 3a cut to predetermined vertical and horizontal dimensions are prepared in advance. At the stage where the clogging occurs and the wetting action on the road surface is reduced, or when the humidifying season comes, the fasteners 40 and 42 can be attached and detached so that only the water guide member 3a can be replaced, so that continuous use is possible. Become.

FIGS. 7 and 8 show a fourth embodiment of the present invention. Also in the present embodiment, only the water guide member 3a is replaceable, and a socket portion 50 is formed at a side edge of the water absorbing material 3 as shown in an enlarged view in a part of FIG. A hard plate 52 inserted into the socket portion 50 is provided integrally with the connection end. And the water guide member 3a
At the time of replacement, the old water guide member 3a is removed by pulling out the hard plate 52 from the socket portion 50, and the hard plate 52 of the new water guide member 3a is inserted into the socket portion 50 so that the two can communicate with each other. I have to.

The water guide member 3a according to this embodiment
As shown in FIG. 8, a plurality of pieces are provided divided in the length direction, and can be connected to the water absorbing member 3 at arbitrary intervals and numbers depending on the degree of moistening of the road surface.

[0036]

As described above in detail, according to the wet pavement system of the present invention, the road surface is maintained in a wet state by constantly retaining water on the surface layer, and the water source is a gutter. Since the rainwater flows into the tank and the rainwater collected in the tank is supplied, the consumption of the water source is small, and the maintenance cost can be reduced.

When the road surface is not wetted, for example, in order to prevent the road surface from freezing in a cold season, the water guide member is held at a position higher than the water surface in the gutter, or the water guide member can be removed. If this is the case, the road surface can be in a dry state, and maintenance for this can be easily performed.

[Brief description of the drawings]

FIGS. 1A and 1B are longitudinal sectional views of a wet pavement system according to a first embodiment of the present invention.

FIG. 2 is a side sectional view including a partial control system in the same.

FIG. 3 is a longitudinal sectional view showing a second embodiment.

FIG. 4 is an upper sectional view of the same.

FIG. 5 is a longitudinal sectional view showing a third embodiment.

FIG. 6 is an upper sectional view of the same.

FIG. 7 is a longitudinal sectional view showing a fourth embodiment.

FIG. 8 is an upper sectional view of the same.

FIG. 9 is a longitudinal section of a wet pavement system previously developed by the applicant.

[Explanation of symbols]

 Reference Signs List 3 water absorbing material 3a water guiding member 5 water permeable pavement material 6 side groove 7 water permeable lid 10 weight 12 rod receiver 14 water guiding pipe 18 return pipe (bypass pipe) 26 overflow pipe (bypass pipe) 30 crankshaft 40,42 fastener 50 socket 52 hard plate

Claims (4)

[Claims] 1. A permeable pavement material for forming a road surface, a gutter disposed at an edge of the pavement for flowing rainwater, and a part of water in the gutter passing through the pavement by capillary action. And a water guide member that is connected as possible, and a water pipe that supplies water at the time of drought is connected to the inside of the gutter, and a bypass pipe that bypasses water to the outside of the gutter at the time of increasing water is connected. Wet pavement system. 2. The water guide member according to claim 1, wherein a side edge of a water-absorbent sheet laid on a lower surface of the water-permeable pavement material via a sand layer is suspended in the side groove. A wet pavement system according to claim 1. 3. The wet pavement system according to claim 2, wherein the lower end portion of the water-absorbent sheet is formed below or above the surface of the water. 4. The wet pavement system according to claim 2, wherein the lower end portion of the water absorbing sheet in the side groove is detachably attached to an edge of the water absorbing sheet in the sand layer.