JP2004068465A - Pumping pavement and its paving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To positively depress the temperature rise of a pavement surface even if a fine weather continues. <P>SOLUTION: In the pumping pavement 1, a water permeable layer 5 in which coarse aggregate 2 are mutually connected by asphalt 4 so as to form voids 3 among the coarse aggregates is laminated on a water impermeable layer 6 and fine aggregates 7 are filled in the voids 3. The water permeable layer 5 pumps water retained in the water permeable layer or supplied to it to the surface side of the water permeable layer through fine clearances among mutual fine aggregates 7 or the coarse aggregates 2 and the fine aggregates 7. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pumped-up pavement mainly used for pedestrian roads and automobile roads in a city and a pavement method thereof.
[0002]
[Prior art]
Various measures have been taken to prevent the heat island phenomenon, in which the pavement surface becomes hot during summer and the temperature is higher than usual over a wide area.For example, various permeable pavements and water retentive pavements are available. It is used for pedestrian roads and motorways.
[0003]
The permeable pavement was originally considered as a measure to cultivate street trees by promoting the penetration of rainwater and air communication by using highly permeable materials instead of highly water-tight asphalt. Water-retaining pavements have been developed for the purpose of suppressing the temperature rise of the pavement surface using the heat of vaporization of water and preventing the heat island phenomenon described above.
[0004]
Japanese Patent Laid-Open No. 9-95904 discloses a perforated surface layer made of porous ceramics having water permeability and water retention, and a water storage capacity and moisture stored in the lower part of the perforated surface layer as water vapor in a fine weather. A pavement having a moisture storage layer having a function of supplying to a perforated surface layer is disclosed.
[0005]
Japanese Patent Laid-Open No. 10-46513 discloses a water-permeable asphalt mixture having a flow capacity of either water or air, or both, and having voids of 15 to 35% by volume, water-permeable cement concrete, Perforated surface layer such as water permeable cement mortar, water permeable petroleum resin mixture, or porous molding block using these materials. A filling arrangement is disclosed.
[0006]
[Problems to be solved by the invention]
However, in the conventional water-retaining pavement, if the water is sufficiently retained, it will evaporate on the surface layer, so it has the effect of suppressing the surface temperature. If it continues, while the effect which suppresses the surface temperature of a pavement surface can be maintained only for about 2 to 3 days, even if it provides the water | moisture-content storage layer provided with the water | water storage capacity after that, Since water can be supplied to the surface layer only as water vapor from the tank, there has been a problem that a sufficient decrease in pavement surface temperature cannot be expected due to the loss of vaporization heat in the surface layer.
[0007]
The present invention has been made in consideration of the above-described circumstances, and provides a pumped-up pavement capable of reliably suppressing an increase in the temperature of the pavement surface even when clear weather continues and a pavement method therefor. The purpose is to do.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the pumped pavement according to the present invention, as described in claim 1, fixes a predetermined coarse aggregate to each other with asphalt so that a gap is formed between the coarse aggregates. A water-permeable layer formed by laminating is laminated on the water-impermeable layer and the gap is filled with a fine-grained material, and the water-permeable layer retains or supplies water to the water-permeable layer between the fine-grained materials or Water is pumped in the direction of the surface of the water-permeable layer through a fine gap between the fine-grained material and the coarse aggregate.
[0009]
Further, the pumped pavement according to the present invention is a state in which the fine-grained materials or the fine-grained materials and the coarse aggregate are brought into contact with each other in the range from the surface of the water-permeable layer to a depth of at least 2 mm from the surface. In addition, a reinforcing coating is formed by solidifying with a predetermined resin so that the pumping path remains.
[0010]
Further, the pumped pavement according to the present invention is a state in which the fine-grained materials or the fine-grained materials and the coarse aggregate are brought into contact with each other in the range from the surface of the water-permeable layer to a depth of at least 2 mm from the surface. In addition, a reflective reinforcing coating is formed by solidifying with a binder made of a predetermined resin and a heat-shielding pigment so that the pumping path remains.
[0011]
Further, the pumped-up pavement according to the present invention has a reservoir channel plate disposed below the impermeable layer, and the water stored in the reservoir channel plate is supplied to the permeable layer so as to be supplied to the permeable layer. The layers are connected via a water conducting material.
[0012]
Further, the pumped pavement according to the present invention is the one in which the permeable layer and the reservoir channel are connected through a predetermined reflux part so that surplus water is returned to the reservoir channel in the supplied water. It is.
[0013]
Moreover, the pumped-up pavement which concerns on this invention embeds the water supply means which supplies water to the said water permeable layer in this water permeable layer.
[0014]
Moreover, the pumped-up pavement which concerns on this invention embeds the water supply means which supplies water to the said water reservoir base in the said water-permeable layer or this water reservoir base.
[0015]
Further, according to the method for paving a pumped-up pavement according to the present invention, a predetermined coarse aggregate is consolidated with asphalt so that a gap is formed between the coarse aggregates. The water-permeable layer is laminated on the water-impermeable layer, and then the water is retained or supplied to the water-permeable layer by filling the gap with the fine-grain material. Water is pumped in the direction of the surface of the water-permeable layer through a fine gap between the coarse aggregate.
[0016]
In the pumped pavement and the pavement method according to the present invention, a water permeable layer formed by assembling predetermined coarse aggregates with asphalt so that a gap is formed between the coarse aggregates is formed as an impermeable layer. The water-permeable layer is formed by filling the gaps described above with the fine-grained material, and the water-permeable layer retains or supplies water to the water-permeable layer between the fine-grained materials or between the fine-grained material and the coarse aggregate. Water is pumped in the direction of the surface of the water-permeable layer through the fine gap.
[0017]
In this case, the water retained or supplied to the water permeable layer is mainly in the direction of the surface of the water permeable layer through the fine gap between the fine particle materials or between the fine particle material and the coarse aggregate due to the capillary phenomenon. It is pumped up or moved in the horizontal direction and then pumped up in the surface direction at an arbitrary location.After that, it evaporates by removing the heat of vaporization from the surface of the water permeable layer, and the conventional case where it evaporates deep in the pavement surface. Unlikely, the temperature rise of the surface of the water permeable layer which is the pavement surface is reliably suppressed.
[0018]
As the coarse aggregate, for example, crushed stone of about 5 to 13 mm may be used, and asphalt can be appropriately selected from known bituminous materials used in asphalt pavement.
[0019]
The gap between the coarse aggregates is preferably set so that, for example, the gap ratio with respect to the entire water-permeable layer is about 15 to 25%.
[0020]
As long as the fine-grained material can pump the retained water or the supplied water to the surface of the water-permeable layer mainly by capillary action as described above, the material, particle size, particle shape, etc. are not limited. It may be natural or artificial, but for example, sand, ceramic fine aggregate, waste glass material crushed to about 0.25 mm, or incinerated ash or baked ash that is further fired and consolidated, volcanic ash, etc. Natural products of can be used.
[0021]
The water retained or supplied to the water-permeable layer once stays in the fine gaps described above, and if the fine-grained material has water retention, the water-retained once in the fine-grained material, The fine-grained material described above desirably has water retention to some extent, and in that sense, a material having a porous structure is preferable.
[0022]
Whether or not a specific treatment is applied to the surface of the water permeable layer is arbitrary. However, the surface of the water permeable layer is a pavement surface on which a vehicle runs or a pedestrian walks. Predetermined in such a manner that the fine-grained material or the fine-grained material and the coarse aggregate are in contact with each other and the pumping path remains in a range from the surface to a depth of at least 2 mm from the surface. A configuration in which a reinforcing film formed by solidifying with a resin is formed.
[0023]
In such a configuration, a reinforcing coating is formed in which fine particles or fine particles and coarse aggregate are solidified together via a resin in the vicinity of the surface of the water permeable layer. In addition to being prevented, the fine-grained material is also prevented from flowing out. In addition, since the pumping path remains in the reinforcing coating, there is no possibility of hindering the pumping action of the water permeable layer.
[0024]
For the same purpose, in the state where the surface of the water-permeable layer and the fine particle material or the fine particle material and the coarse aggregate are in contact with each other in a range from the surface to a depth of at least 2 mm, A configuration may be considered in which a reflective reinforcing coating is formed by solidifying with a binder made of a predetermined resin and a heat-shielding pigment so as to remain.
[0025]
In such a configuration, as described above, a reinforcing coating is formed in the vicinity of the surface of the water permeable layer, so that the above-described wear and fine granule outflow are prevented, and a pumping path remains in the reinforcing coating. Therefore, in addition to the effect of not hindering the pumping action of the water permeable layer, it is also possible to suppress the temperature rise of the pavement surface using the reflection of direct sunlight by the heat shielding pigment added in the binder It becomes.
[0026]
In the present invention described above, the water retained or supplied to the water permeable layer is pumped up to the surface of the water permeable layer, and after that, by evaporating on the surface, the temperature increase of the surface of the water permeable layer that is a paving surface is suppressed. Even if the water is retained in the permeable layer by natural rainfall, the above-mentioned remarkable effect of the present invention due to the pumping action in the permeable layer is not reduced at all, but a water reservoir is disposed below the impermeable layer. In addition, if the water reservoir and the water permeable layer are connected via a water guide so that the water stored in the water reservoir is supplied to the water permeable layer, even when the weather is raining, Needless to say, the water is stored in the reservoir channel for a long period of time, and the water stored in the reservoir channel is supplied to the permeable layer in the liquid phase through the water conduit, and further to the surface of the permeable layer. After being pumped, Unlike conventional water storage means that evaporates deeply on the pavement surface because it evaporates and lowers the temperature of the permeable layer surface while taking away the heat of vaporization, the water stored in the reservoir channel according to the present invention is the pavement surface. A temperature rise on the surface of a certain water permeable layer can be reliably and continuously suppressed.
[0027]
The water reservoir can be composed of a large number of crushed stones, for example.
[0028]
Here, if the permeable layer and the reservoir channel board are connected to each other through a predetermined reflux part so that excess water is returned to the reservoir channel board among the supplied water, the excess water is effectively used. It becomes possible.
[0029]
On the other hand, a water supply means for supplying water to the water permeable layer may be embedded in the water permeable layer without providing a water reservoir base. In such a configuration, when the water retained in the permeable layer is insufficient, such as in fine weather, water may be supplied to the permeable layer through the water supply means as needed.
[0030]
In the configuration in which the water reservoir base is provided, if the water supply means for supplying water to the water reservoir base is embedded in the permeable layer or the water base, the temperature of the pavement surface rises even when there is no rain for a long time. Can be reliably and continuously suppressed.
[0031]
Here, when such a water supply means is provided in the water permeable layer, the supplied water is stored in the reservoir channel board via the water guide and the reflux portion.
[0032]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a pumped-up pavement and a pavement method according to the present invention will be described with reference to the accompanying drawings. Note that components that are substantially the same as those in the prior art are assigned the same reference numerals, and descriptions thereof are omitted.
[0033]
(First embodiment)
[0034]
FIG. 1 is a cross-sectional view showing a pumped-up pavement according to the present embodiment. As can be seen from the figure, the pumped pavement 1 according to the present embodiment is a water-permeable permeation formed by assembling coarse aggregates 2 with asphalt 4 so that gaps 3 are formed between the coarse aggregates. The layer 5 is laminated on the water-impermeable layer 6 and the gap 3 is filled with the fine particle material 7. The water-permeable layer 5 holds the water retained or supplied to the water-permeable layer between the fine particle materials 7 or the Water is pumped in the direction of the surface of the water-permeable layer through a fine gap between the fine-grained material 7 and the coarse aggregate 2.
[0035]
The coarse aggregate 2 may use, for example, crushed stone of about 5 to 13 mm, and the asphalt 4 may be appropriately selected from known bituminous materials used in asphalt pavement. The gap 3 between the coarse aggregates 2 is set so that the void ratio with respect to the entire water-permeable layer 5 is about 15 to 25%, for example.
[0036]
The fine-grained material 7 can pump the retained water or the supplied water mainly to the surface of the water permeable layer 5 by capillary action, for example, from a general waste incinerator or an industrial waste incinerator. So-called roasted ash obtained by roasting incinerated ash or calcined ash discharged at a high temperature can be used.
[0037]
Since such roasted ash is a porous material, it itself has a certain water holding capacity. Therefore, it can be said that it is a preferable material for use as the fine-grain material 7.
[0038]
Here, a reinforcing coating 8 is formed on the surface of the water-permeable layer 5 and in a range from the surface to a depth of 2 mm to 5 mm. The reinforcing coating is composed of the fine particles 7 or the fine particles and the coarse aggregate. The two are in contact with each other and are consolidated with an epoxy resin so that the pumping path remains.
[0039]
In other words, the residual water pumping path means that the reinforcing coating 8 is configured to have a certain water permeability or air permeability. For that purpose, if the amount of the resin is adjusted as appropriate. Good.
[0040]
The reinforcing coating 8 is preferably applied so that fine aggregates are appropriately mixed with the epoxy resin as necessary and rubbed into the surface of the water-permeable layer 5.
[0041]
What is necessary is just to form the impermeable layer 6 with a dense particle size asphalt mixture, for example.
[0042]
In order to pave the pumped water pavement 1 according to the present embodiment, first, as shown in FIG. 2A, the coarse aggregate 2 is made of asphalt 4 so that a gap 3 is formed between the coarse aggregates. The water permeable layers 5 ′ that are solidified with each other are laminated on the water impermeable layer 6.
[0043]
The work of paving the water permeable layer 5 'is a known procedure for paving asphalt pavement, for example, mixing coarse aggregate 2 and asphalt 4 in an asphalt plant and carrying it to the site so that the temperature does not fall below about 110 ° C. In such a case, the asphalt finisher may be laid and leveled, and this may be further tightened with a road roller. However, the amount of asphalt 4 is adjusted as appropriate so that the void ratio is, for example, about 15 to 25%.
[0044]
Next, wait until the temperature of the paved permeable layer 5 'is sufficiently lowered, and then fill the gap 3 formed in the permeable layer 5' with fine granules 7 as shown in FIG. To do.
[0045]
The fine particle material 7 may be filled using, for example, a vibration roller.
[0046]
Next, as shown in FIG. 2C, a reinforcing coating 8 is formed on the surface of the water permeable layer 5.
[0047]
When the fine particles 7 are filled in the gaps 3 between the coarse aggregates 2 in this way, the water retained or supplied to the water permeable layer 5 is mainly due to the capillary phenomenon, or between the fine particles 7 and the fine particles and the coarse bone. Water is pumped in the direction of the surface of the water permeable layer through a fine gap between the material 2 and then vaporizes by removing the heat of vaporization from the surface of the water permeable layer 5. In addition, since the pumping path is formed in the reinforcing coating 8, there is no possibility that the pumping action of the water permeable layer 5 is hindered.
[0048]
As described above, according to the pumped water pavement 1 and the pavement method according to the present embodiment, the water retained or supplied to the water permeable layer 5 is pumped in the surface direction of the water permeable layer mainly by capillary action, and thereafter Since it evaporates by removing the heat of vaporization from the surface of the water permeable layer 5, unlike the conventional case where it evaporates deep in the pavement surface, the temperature rise of the surface of the water permeable layer 5 that is the pavement surface can be reliably suppressed.
[0049]
Moreover, according to the pumped-up pavement 1 which concerns on this embodiment, since the reinforcement film 8 was formed in the surface of the water-permeable layer 5, while being able to prevent the wear by vehicle driving | running | working or a walk, it can prevent fine particles It is also possible to prevent the material 7 from flowing out.
[0050]
Although not particularly mentioned in the present embodiment, a reflective reinforcing coating may be formed instead of the reinforcing coating 8. That is, the surface of the water-permeable layer 5 and the fine-grained material 7 or the fine-grained material and the coarse aggregate 2 are in contact with each other in the range from the surface to a depth of 2 to 5 mm, and the pumping path is formed to remain. As described above, a predetermined reinforcing resin and a heat-shielding pigment are bonded together to form a reflective reinforcing coating.
[0051]
According to such a configuration, as with the reinforcing coating 8, wear and outflow of fine particles are prevented, and a heat shielding pigment is added in the binder, so that the reflection of direct sunlight by the heat shielding pigment can be achieved. It is also possible to suppress the temperature rise of the paved surface.
[0052]
Further, in the present embodiment or its modification, the reinforcing coating 8 and the reflective reinforcing coating are formed in a range from the surface to a depth of 2 mm to 5 mm, but there is no problem in preventing wear and preventing the fine material from flowing out. If necessary, 2 mm is sufficient, and in some cases, the reinforcing coating 8 and the reflective reinforcing coating itself may be omitted.
[0053]
On the other hand, if there is a concern about the outflow of the fine-grained material 7, the reinforcing coating 8 or the reflective reinforcing coating may be formed in the water-permeable layer 5 to a depth where the outflow can be prevented, for example, exceeding 5 mm. Absent.
[0054]
(Second Embodiment)
[0055]
Next, a second embodiment will be described. Note that components that are substantially the same as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0056]
FIG. 3 is a cross-sectional view showing a pumped-up pavement according to the present embodiment. As can be seen from the figure, the pumped water pavement 21 according to the present embodiment is similar to the pumped water pavement 1 in that the water permeable layer 5 is laminated on the water impermeable layer 6 and the gap 3 is filled with the fine granule material 7. The water-permeable layer 5 holds water supplied or supplied to the water-permeable layer in the direction of the surface of the water-permeable layer through the fine particles 7 or between the fine particles 7 and the coarse aggregate 2. Although the water is pumped, in this embodiment, the water reservoir base plate 22 is disposed below the impermeable layer 6 and the water stored in the water reservoir base plate is supplied to the water permeable layer 5. 22 and the water permeable layer 5 are connected via a water guide sheet 23 as a water guide material.
[0057]
The reservoir channel base 22 may be made of crushed stone, for example. Moreover, what is necessary is just to comprise the water conveyance sheet | seat 23, for example using a woven fabric so that the water stored by the water storage channel board 22 by the capillary phenomenon may be supplied to the water permeable layer 5. FIG.
[0058]
Here, in the pumped water pavement 21, the water permeable layer 5 and the reservoir channel base plate 22 are connected via the reflux unit 24 so that excess water out of the water supplied from the reservoir channel base plate 22 to the permeable layer 5 is returned to the reservoir channel base plate 22. Are connected in communication.
[0059]
That is, the reflux part 24 is configured on the downstream side of the water permeable layer 5 using crushed stone or the like, that is, on the road shoulder side so as to secure a space for the excess water to circulate. The water stored in the water-permeable layer 5 is supplied to the upstream side of the water-permeable layer 5 through the water guide sheet 23 as shown by the arrow in the figure, and then flows down along the gradient on the water-impermeable layer 6. In the case where water is appropriately supplied to the water permeable layer 6 and sufficient water is retained in the permeable layer 6 and surplus water is generated, the surplus water is stored in the reservoir channel 22 via the reflux unit 24 provided on the downstream side. To reflux.
[0060]
When the water guide sheet 23 is raised from the water storage base plate 22 and connected to the permeable layer 5, the rising pitch and the starting position are arbitrary, and for example, it is considered to be raised every 1 m along the road width. It is done.
[0061]
In order to pave the pumped water pavement 21 according to the present embodiment, first, after excavating a road construction planned portion, a water guide sheet 23 is laid on the bottom surface of the excavation, and then the water storage base plate 22 and the impermeable layer 6 are formed thereon. Then, the water guide sheet 23 is started up so as to involve the water reservoir base and the impermeable layer, and this is further extended on the impermeable layer 6. In addition, when the soil spreading below the excavation bottom is not an impermeable layer, a waterproof sheet is laid on the excavation bottom as necessary.
[0062]
Next, the reflux part 24 is provided on the road shoulder side, and then the water permeable layer 5 may be paved in the same procedure as described in the first embodiment.
[0063]
Thus, when the fine granule 7 is filled in the gap 3 between the coarse aggregates 2, the water retained or supplied to the water permeable layer 5 is mainly due to the capillary phenomenon, or between the fine granules 7 and the fine granule. Water is pumped in the direction of the surface of the water-permeable layer through a fine gap between the aggregate 2 and then vaporizes from the surface of the water-permeable layer 5 to evaporate. In addition, since the pumping path is formed in the reinforcing coating 8, there is no possibility that the pumping action of the water permeable layer 5 is hindered.
[0064]
In the present embodiment, the reservoir channel base 22 and the permeable layer 5 are disposed so that the reservoir channel base 22 is disposed below the impermeable layer 6 and the water stored in the reservoir channel base is supplied to the permeable layer 5. Are connected via a water guide sheet 23.
[0065]
Therefore, even if the weather continues, it goes without saying that the water at the time of raining is stored in the reservoir channel board 22 for a long period of time, and the water stored in the reservoir channel board 22 remains in the liquid phase via the water guide sheet 23. It is supplied to the water permeable layer 5.
[0066]
And the water supplied to the water permeable layer 5 is further pumped up to the surface of the water permeable layer 5 by the above-described pumping action, and then evaporates while taking heat of vaporization for the first time to lower the surface temperature of the water permeable layer 5. It will be.
[0067]
As described above, according to the pumped water pavement 21 and the pavement method thereof according to the present embodiment, the water retained or supplied to the water permeable layer 5 is pumped mainly in the surface direction of the water permeable layer by capillary action, and thereafter Since it evaporates by removing the heat of vaporization from the surface of the water permeable layer 5, unlike the conventional case where it evaporates deep in the pavement surface, the temperature rise of the surface of the water permeable layer 5 that is the pavement surface can be reliably suppressed.
[0068]
Further, according to the pumped water pavement 21 according to the present embodiment, since the reinforcing coating 8 is formed on the surface of the water permeable layer 5, it is possible to prevent wear due to vehicle running or walking, and fine particles. It is also possible to prevent the material 7 from flowing out.
[0069]
In addition, according to the pumped water pavement 21 according to the present embodiment, even when clear weather continues, the water stored in the water reservoir base plate 22 at the time of raining is supplied as needed to the permeable layer 5 in the liquid phase via the water guide sheet 23. In addition, since the water is pumped up to the surface of the permeable layer 5 by the above-described pumping action, and then evaporates while taking the heat of vaporization on the surface of the permeable layer 5, the conventional water storage means that evaporates deep in the pavement surface. In contrast, the water stored in the water storage base plate 22 can reliably suppress an increase in the surface temperature of the water permeable layer 5 that is a paved surface.
[0070]
In addition, according to the pumped water pavement 21 according to the present embodiment, the water permeable layer 5 and the reservoir channel base plate 22 are communicated with each other through the reflux unit 24 so that surplus water in the supplied water is returned to the reservoir channel base plate 22. Since the connection is made, the surplus water can be used effectively.
[0071]
Although not particularly mentioned in the present embodiment, a reflective reinforcing coating may be formed instead of the reinforcing coating 8 as in the first embodiment. That is, the surface of the water-permeable layer 5 and the fine-grained material 7 or the fine-grained material and the coarse aggregate 2 are in contact with each other in the range from the surface to a depth of 2 to 5 mm, and the pumping path is formed to remain. As described above, a predetermined reinforcing resin and a heat-shielding pigment are bonded together to form a reflective reinforcing coating.
[0072]
According to such a configuration, as with the reinforcing coating 8, wear and outflow of fine particles are prevented, and a heat shielding pigment is added in the binder, so that the reflection of direct sunlight by the heat shielding pigment can be achieved. It is also possible to suppress the temperature rise of the paved surface.
[0073]
In the present embodiment or its modification, the formation range of the reinforcing coating 8 and the reflective reinforcing coating is a range from the surface to a depth of 2 mm to 5 mm. However, as in the first embodiment, wear and fine-grained materials are used. If there is no hindrance to the prevention of outflow, 2 mm is sufficient, and in some cases, the reinforcing coating 8 and the reflective reinforcing coating itself may be omitted.
[0074]
On the other hand, if there is a concern about the outflow of the fine-grained material 7, the reinforcing coating 8 or the reflective reinforcing coating may be formed in the water-permeable layer 5 to a depth where the outflow can be prevented, for example, exceeding 5 mm. Absent.
[0075]
Although not particularly mentioned in the present embodiment, as shown in FIG. 4, a porous tube 31 as a water supply means is embedded in the water permeable layer 5, and the water pumped from the base end side of the porous tube is supplied to the porous tube 31. If it is configured so as to be supplied to the water permeable layer 5 through the hole of the perforated pipe, it becomes possible to replenish the water reservoir 22 at any time. Thus, even when there is no rainfall for a long time, The temperature rise of a certain water-permeable layer 5 can be suppressed reliably.
[0076]
Here, when the perforated pipe 31 is embedded in the water permeable layer 5, the supplied water is stored in the reservoir channel board 22 via the water guide sheet 23 and the reflux portion 24.
[0077]
In addition, since water can be directly supplied to the permeable layer 5 by replenishing water with the perforated pipe 31, the water storage base plate 22, the water guide sheet 23, and the reflux unit 24 may be omitted in some cases. That is, in this structure, the porous pipe 31 as a water supply means will be embed | buried in the water permeable layer 5 of the pumped-up pavement 1 which concerns on 1st Embodiment.
[0078]
【The invention's effect】
As described above, according to the pumped water pavement and the pavement method according to the present invention, the water retained or supplied to the water permeable layer is pumped in the surface direction of the water permeable layer mainly by a capillary phenomenon, and then the water permeable layer. Since it evaporates by removing vaporization heat from the surface, unlike the conventional case of evaporating deep in the pavement surface, it is possible to reliably suppress the temperature rise of the surface of the water permeable layer that is the pavement surface.
[0079]
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a pumped pavement according to a first embodiment.
FIG. 2 is a construction diagram showing a procedure for paving a pumped-up pavement according to the first embodiment.
FIG. 3 is a sectional view of a pumped pavement according to a second embodiment.
FIG. 4 is a cross-sectional view of a pumped pavement according to a modification.
[Explanation of symbols]
1,21 Pumped pavement 2 Coarse aggregate 3 Gap 4 Asphalt 5 Water-permeable layer 6 Water-impermeable layer 7 Fine-grained material 8 Reinforcement coating 22 Reservoir channel base 23 Water-conducting sheet (water-conducting material)
24 Reflux section 31 Perforated tube (water supply means)

Claims (8)

A water-permeable layer is formed on the water-impermeable layer by laminating predetermined coarse aggregates with asphalt so that a gap is formed between the coarse aggregates, and the gap is filled with fine particles. The water permeable layer is configured to retain water supplied to or supplied to the water permeable layer, or the surface direction of the water permeable layer through the fine particles or between the fine particles and the coarse aggregate. Pumped water pavement characterized by pumping water. In the state where the surface of the water-permeable layer and the depth of at least 2 mm from the surface are in contact with each other, the fine-grained material and the fine-grained material and the coarse aggregate are formed so that the pumping path remains. The water-lifting pavement according to claim 1, wherein a reinforcing coating is formed by solidifying with a predetermined resin. In the state where the surface of the water-permeable layer and the depth of at least 2 mm from the surface are in contact with each other, the fine-grained material and the fine-grained material and the coarse aggregate are formed so that the pumping path remains. The liftable pavement according to claim 1, wherein a reflective reinforcing coating is formed by bonding together with a binder made of a predetermined resin and a heat shielding pigment. A water storage channel board is disposed below the impermeable layer, and the water storage board and the water permeable layer are connected via a water guide so that water stored in the water storage channel board is supplied to the water permeable layer. The pumped-up pavement according to any one of claims 1 to 3. The pumped-up pavement according to claim 4, wherein the water permeable layer and the water storage channel board are connected to each other through a predetermined return part so that surplus water of the supplied water is returned to the water storage channel board. The pumped-up pavement according to any one of claims 1 to 3, wherein water supply means for supplying water to the water permeable layer is embedded in the water permeable layer. The water pumping pavement according to claim 5, wherein water supply means for supplying water to the water reservoir base is embedded in the water permeable layer or the water reservoir base. A water-permeable layer formed by assembling a predetermined coarse aggregate with asphalt so as to form a gap between the coarse aggregates is laminated on the water-impermeable layer, and then the fine-grained material is formed in the gap. By filling the water-permeable layer, the water retained or supplied to the water-permeable layer is pumped in the surface direction of the water-permeable layer through the fine particles or between the fine-grained material and the coarse aggregate. A pavement method for lifted pavement, characterized by:

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