JP3900404B2 - Paved road - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paved road structure. More specifically, the present invention relates to a paved road structure that can suppress an increase in temperature of the paved road due to radiant heat.
[0002]
[Prior art]
With the aim of eliminating the heat island phenomenon, water-retaining pavement whose cross section is shown in FIG. 5 is being adopted in urban areas in order to suppress the temperature rise on the paved road (to suppress the temperature rise of the road).
[0003]
The water-retaining pavement in FIG. 5 is a pavement that suppresses an increase in road surface temperature by evaporating water stored in a special cement grout in the pavement.
More specifically, as shown in FIG. 5, a base layer 80 having a thickness of 5 cm made of dense grained ascon is formed on the upper part of the roadbed 100, and further, the thickness after forming on the base layer 80 is 25 to 10 cm. The pavement surface 20 is formed by laying an open-graded asphalt mixture 20a and injecting and compacting a grout 20b containing mineral fine powder having water retention into the voids of the open-graded asphalt mixture 20a.
In addition, the thickness (dimension) of each said layer is a value as 1 implementation example.
[0004]
However, in the technique shown in FIG. 5 described above, there is no facility for supplying moisture to the layer 20 having water retention composed of the water retention grout 20b and the open-graded asphalt mixture 20a, and has water retention. The strata must be supplied with rainwater only.
Therefore, when the amount of precipitation is small, water does not accumulate in the water retention layer (water retention layer 20), and the temperature rise suppression effect due to evaporation (heat of vaporization) of the water in the water retention layer 20 cannot be obtained. Become.
This can be a fatal drawback when implemented in the Japanese archipelago, which tends to be extremely hot in years when precipitation is low.
[0005]
[Problem to be Solved by the Invention]
The present invention has been proposed in view of the above-described problems of the prior art, and an object thereof is to provide a paved road that can reliably suppress an increase in temperature on the paved road even when the amount of precipitation is small. .
[0006]
[Means for Solving the Problems]
According to the present invention, the base (8) is in contact with the upper part of the groundwater area (W), the pavement surface (2f) is provided above the base (8), and the material has water retention. In the paved road provided with the water retaining layer (2), ground water supply grooves (10, 12) extending in the front / rear / left / right directions are provided at the upper position of the base (8) under the water retaining layer (2). A vertical hole (4) communicating from the zone (W) to the water retention layer (2) is provided at the intersection of the groundwater supply grooves (10, 12) extending in the front / rear / left / right direction, and the vertical hole (4 ) And the groundwater supply grooves (10, 12) are filled with polymer fibers, so that groundwater is supplied to the water retaining layer by capillary action.
[0007]
If the pavement of the present invention having such a configuration is adopted, the vertical holes 4 are filled with polymer fibers that cause capillary action, so that groundwater is passed through the vertical holes 4 by capillary action. Can be supplied to the water retaining layer (for example, porous concrete) 2.
In the water retention layer 2 supplied with the groundwater, the groundwater supplied by heat (radiant heat for heating the pavement surface) evaporates, and the temperature rise of the road surface 2f can be suppressed by taking the heat of vaporization.
[0008]
Unlike rainwater, groundwater is supplied to the water retention layer (2) through the vertical hole (4) (or groundwater supply layer 6) without being affected by the climate, and the disadvantages of the prior art are solved.
In addition, it is possible to store rainwater in the groundwater supply layer (6) during rainfall. And when there is much sunshine amount and there is much radiant heat, the said stored rainwater can be supplied to a water retention layer, and the raise of road surface temperature can be suppressed by vaporization heat.
[0009]
Here, the water-retaining layer may be mixed with not only water-retaining concrete or porous concrete but also a long fibrous material. This is because such a long fibrous material has water retention. Then, due to capillary action of long fibers, groundwater flows around the entire water retaining layer, and the road surface (2f) is cooled when it is vaporized.
In addition to this, the strength of the concrete is improved because it is reinforced by the long fibrous material. And since the said pavement technique does not use a reinforcing bar, there is no need for a reinforce like a reinforcing bar in the future road construction. In addition, it is also possible to employ a short fibrous material instead of the long fibrous material. However, in the case of short fibers, it is desirable to use long fibers because the capillaries may be cut in the middle and water may not rotate.
[0011]
In this case, the groundwater supply groove may be configured as the open pit 10 or the underdrain 12.
In the case of having such a configuration, the groundwater supplied through the vertical hole 4 is supplied to a region separated from the vertical hole 4 through the groundwater supply groove 10 (or 12). Therefore, even in a region separated from the vertical hole 4, groundwater is supplied, and the supplied groundwater evaporates from the paved road surface, and the temperature rise of the road surface 2 f can be suppressed by the heat of vaporization at this time.
[0012]
In carrying out the present invention, it may be implemented only on the sidewalk. Moreover, it is preferable to carry out also in a parking lot or open air, where it is paved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0014]
In FIG. 1, a groundwater supply layer 6 is formed above a base 8 in contact with a layer (groundwater area) W containing groundwater below and filled with polymer fibers that are rich in water retention and cause capillary action.
[0015]
The upper part of the groundwater supply layer 6 is composed of, for example, an open-graded asphalt mixture 2a, which is a base material, and a water-retaining grout (or porous concrete or water-retaining mortar) 2b that is injected into the gap and has water retention. A water retention layer 2 including a paved surface (road surface) 2f is formed.
[0016]
A plurality of vertical holes 4 having a predetermined pitch communicate with the water retaining layer 2 from the layer W including the groundwater.
The vertical holes 4 are filled with, for example, fibrous materials such as polymer fibers, various water retention materials, and the like.
[0017]
If the pavement of the embodiment having such a configuration is adopted, the vertical holes 4 are filled with a material that causes capillary action such as polymer fibers, so that groundwater can be introduced into the vertical direction by capillary action. It can be supplied to the water retention layer 2 through the holes 4 or the groundwater supply layer 6.
[0018]
Further, in the groundwater supply layer 6, the water sucked up by the capillary phenomenon such as the fibrous material or various water retention materials filled in the vertical holes 4 is rich in water retention and the capillary phenomenon filled in the groundwater supply layer 6. It can also be sent to every corner of the groundwater supply layer 6 depending on the resulting material and stored once.
[0019]
In the water retaining layer 2 to which the groundwater is supplied, the supplied groundwater is evaporated by heat (radiant heat for heating the pavement surface), and the heat of vaporization is taken away, so that the temperature rise of the road surface 2f can be suppressed.
[0020]
In the following FIGS. 2 to 4, the same parts as those in FIG.
The pavement shown in FIG. 2 is a plan view of a layer including the base 8, the unfolding 10 or the underdrain 12. (A-A cross section in the figure is the cross section shown in FIG. 1 above.)
[0021]
In FIG. 3, referring also to FIG. 2, for example, above the base 8 in contact with the layer W containing groundwater below, for example, the base is an open-graded asphalt mixture 2 a and injected into the voids to have water retention. A water retention layer 2 including a pavement surface (road surface) 2f composed of a water retention grout (or porous concrete or water retention mortar) 2b is formed.
[0022]
At a position in contact with the water retention layer 2 at the top of the base 8, a rectangular cross-section opening 10 in which polymer fibers are filled in the groove is assembled like a bar in the front, rear, left and right.
[0023]
Alternatively, as shown in the cross-section of FIG. 4, in the same manner as in FIG. A rectangular culvert 12 filled with a water retention material or the like is provided.
In FIG. 4, reference numeral 12a denotes a culvert cover.
[0024]
According to the paved road of the present embodiment having such a configuration, the groundwater supplied through the vertical hole 4 is supplied to a region separated from the vertical hole 4 through the open channel 10 or the underdrain 12. . Therefore, even in a region separated from the vertical hole 4, groundwater is supplied, and the supplied groundwater evaporates from the paved road surface 2f, and the temperature rise of the road surface 2f can be suppressed by the heat of vaporization at this time.
[0025]
Moreover, rainwater can be stored in the open water 10 or the underground water supply groove | channel which is the underdrain 12, and a water | moisture content can be supplied to the water retention layer 2 side at the time of drying.
[0026]
It should be noted that the illustrated embodiment is merely an example, and is not a description to limit the technical contents of the present invention.
[0027]
【The invention's effect】
The effects of the present invention are listed below.
(1) By using a material (eg, a fibrous material such as polymer fiber or various water retention materials) that causes capillary action filled in the vertical hole, the groundwater is passed through the vertical hole or the groundwater supply layer. , And can be supplied to a water retention layer (for example, porous concrete).
(2) In the water retention layer to which groundwater is supplied, the supplied groundwater evaporates due to heat (radiant heat that heats the pavement surface), deprives the heat of vaporization, and can suppress an increase in road surface temperature.
(3) Groundwater is not affected by the climate and is supplied to the reservoir through the vertical hole (or groundwater supply layer). Therefore, when the pavement surface is heated, the increase in road surface temperature is always suppressed. I can do it.
(4) Groundwater is supplied to an area separated from the vertical hole by opening or underdraining provided immediately below the water retention layer. Therefore, even in a region separated from the vertical hole, the supplied groundwater evaporates from the paved road surface, and the temperature rise of the road surface can be suppressed by the heat of vaporization at this time.
(5) Rainwater can be stored in open or culverts, and moisture can be supplied to the water retention layer side during drying.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a paved road embodying the present invention.
FIG. 2 is a plan view of a paved road embodying the present invention.
3 is a cross-sectional view showing an example of a BB cross section in FIG. 2;
4 is a cross-sectional view showing another example of the BB cross section of FIG. 2;
FIG. 5 is a cross-sectional view of a paved road in the prior art.
[Explanation of symbols]
2 ... Water retention layer 4 ... Vertical hole 6 ... Groundwater supply layer 8 ... Bases 10, 12 ... Groundwater supply groove 2a ... Open grain size asphalt mixture 2b ... Water retention grout 2f ... Pavement surface

Claims (1)

  A water retention layer (2) having a base (8) in contact with the upper part of the groundwater area (W), a pavement surface (2f) above the base (8), and made of a material having water retention In the paved road provided with a groundwater supply groove (10, 12) extending in the front / rear / left / right direction at the upper position of the base (8) under the water retention layer (2), the water is retained from the groundwater area (W). A vertical hole (4) communicating with the layer (2) is provided at the intersection of the groundwater supply grooves (10, 12) extending in the front / rear / left / right direction. 10, 12) is a paved road filled with polymer fibers, so that groundwater is supplied to the water retaining layer by capillary action.

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