JP2000001806A - Drain-gutter block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain gutter, which can be installed easily to the interchange, junction, a medial strip, etc., of an expressway rapidly and safely and in which construction cost can also be reduced. SOLUTION: The drain-gutter block A is laid on one side of a road 12, in which a draining paving layer 11 is laminated on an asphalt pavement 10. A cylindrical drain-gutter block body 17 with a flat hollow cross section is molded integrally by a plate-shaped bottom section 13, sidewall sections 14, 15 disposed in upright on both side sections of the bottom section 13 and a plate-shaped ceiling section 16 connecting the mutual upper sections of the sidewall sections 14, 15, and openings 19, 20 communicating the draining paving layer 11 and a water way 18 in the drain-gutter block body 17 at that time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage ditch block used for highway interchanges, junctions, median strips and the like.

[0002]

2. Description of the Related Art Conventionally, there is a drain groove B of the form shown in FIG.

[0003] As shown in the figure, when used for a median strip, for example, a drain groove B is formed in a digging groove provided on one side of a road 72 provided with a drainage pavement layer 71 on the upper surface of asphalt 70, by a U-shaped gutter. A block 73 is provided, and the upper part of the U-shaped side groove block 73 is covered with a cover plate 74.
Are placed on both sides of the base concrete 75, 76, and the boundary blocks 77, 78 are placed on the base concrete 75, 76, and a space formed between the boundary blocks 77, 78 is filled with a sand mason 79, and And a drain hole 81 for communicating the U-shaped side groove block 73 and the drainable pavement layer 71 with a part of the boundary block 78, the cover plate 74, and the U-shaped side groove block 73. Are provided.

[0004] With this configuration, it is possible to allow rainwater that falls on the road 72 to flow into the U-shaped gutter block 73 through the drainable pavement layer 71 and the drain hole 81.

[0005]

However, the above-mentioned drain groove B still has the following problems to be solved. That is, the drain groove B is composed of the U-shaped side groove block 73 and the cover plate 74.
And foundation concrete 75 and 76 and boundary block 7
Since it is constructed by using a large number of constituent members consisting of 7, 78, sand sand 79 and concrete 80, the cost of raw materials is high, and the process is complicated, so that the overall construction cost is also high. . Further, the U-shaped side groove block 73
In addition, since the cover plate 7 and the boundary blocks 77 and 78 are all heavy, the transportation and installation work is heavy.

The present invention has been made in view of such circumstances, and can be easily, quickly, and safely installed at an interchange of a highway, a junction, a median strip, or the like. It is an object of the present invention to provide a drain block capable of reducing construction costs.

[0007]

According to the present invention, there is provided a semiconductor device comprising:
The drain block described is a bottom with a flat bottom surface,
A drainage channel for collecting rainwater flowing from a drainable pavement layer, wherein a side wall portion connected to both sides of the bottom portion and a ceiling portion connecting the side wall portions on both sides are integrally formed, and a flow channel is formed therein. Block, the cross section of the water channel is wider in width than its height, the lower corners on both sides are smoothly rounded,
In addition, a wide opening serving also as an inspection hole is formed at an upper portion on one side of the side wall portion, and a flowing water portion into which water passing through the drainage pavement layer flows is formed below the opening.

According to a second aspect of the present invention, there is provided the drain groove block according to the first aspect, wherein a water-permeable portion is formed on the bottom surface of the opening so that the drainage pavement layer is partially extended and partially constructed. ing.

A drain groove block according to a third aspect of the present invention has a bottom having a flat bottom surface, side walls connected to both sides of the bottom,
And the ceiling communicating with the side walls on both sides are integrated,
Inside is a drain block that collects rainwater flowing from a drainage pavement layer with a flowing channel formed therein, wherein the cross section of the flowing channel is wider in width than its height, and the lower corners on both sides are smooth. It is rounded, and a wide opening that also serves as an inspection hole is formed in the upper part on one side of the side wall part, and a flowing water part through which the seepage flow of the drainable pavement layer passes is formed below the opening. It is formed according to the height of the drainage pavement layer.

According to a fourth aspect of the present invention, in the drain groove block according to the third aspect, the water flow portion is formed of a plurality or a large number of small holes penetrating the side wall portion.

According to a fifth aspect of the present invention, in the drain groove block according to the fourth aspect, an upper portion communicates with the opening on the front side of the water flowing portion in accordance with the height of the drainage pavement layer. Notches are formed. According to a sixth aspect of the present invention, in the drain groove block according to the third aspect, the water flow portion is formed of a water-permeable block made of a porous material.

According to a seventh aspect of the present invention, in the drain groove block according to the third aspect, a common notch frame is provided on a front side of the opening and the flowing water portion, and the notch is provided. The frame is equipped with a porous filter or a lattice filter.

The drain groove block according to claim 8, wherein the bottom has a flat bottom surface, side walls connected to both sides of the bottom,
And the ceiling communicating with the side walls on both sides are integrated,
Inside is a drain block with a flowing channel formed,
The cross section of the flowing water channel is wider in width than its height, the lower corners on both sides are smoothly rounded, and the upper part of the side wall is connected to the flowing water channel and constructed on the side. A flowing water hole group consisting of a plurality of vertical holes through which the surface flow of the drainage pavement layer to be passed passes is formed, and a plurality or a number of small holes are formed below the water flow hole group to form the drainage pavement layer. A flowing water portion through which the infiltration flow passes is formed.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention.

(First Embodiment) First, an overall configuration of a drain groove block A according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a large number of drain groove blocks A are laid along one side of a road 12 in which a drainable pavement layer 11 is laminated on an asphalt pavement 10. In the drain groove block A shown in FIGS. 1 to 7, a flat bottom 13, left and right walls 14 and 15 erected on both sides of the bottom 13, and left and right walls 14 and 15.
A cylindrical drain block main body 17 having a flat water passage 18 with a flat hollow cross section is integrally formed with a flat ceiling 16 connecting the upper parts of the pipes. The cross section of the flow channel 18 is wider in width than its height, and the lower corners on both sides are smoothly rounded. In the upper part of the right side wall 15, two wide openings 19, 20 which also serve as inspection holes communicating the drainage pavement layer 11 and the water channel 18 in the drain groove block main body 17.
Is provided.

In the above-described configuration, as shown in FIGS. 2 to 6, the bottom portion 13 is a wide and long rectangular flat plate having a flat bottom surface, and has a width slightly larger than a ceiling portion 16 described later. . The left and right wall portions 14 and 15 are set to have a height approximately one half of the width of the bottom portion 13 and the ceiling portion 16 in order to make the drain groove block body 17 a cylindrical shape having a flat hollow cross section. Like the bottom part 13, the ceiling part 16 is also formed of a wide and long rectangular flat plate, and has a flat horizontal mounting surface 21 formed thereon. On the other hand, the lower part of the ceiling part 16 has an arch shape whose central part bulges upward, and when a flower bed or the like is provided on the horizontal mounting surface 21, reinforcing bars 24 described later (see FIG. 5) It is designed to ensure sufficient support strength in cooperation with. The width of the ceiling 16 is symmetrical and slightly narrower than the bottom 13. Therefore,
The left and right side walls 14 and 15 are formed with inclined surfaces that gradually retreat upward, so that the drain groove block A can be prevented from being trampled by a truck or the like.

The openings 19 and 20 provided in the right side wall portion 15 are
They are provided at intervals in the longitudinal direction, and each have a horizontally long rectangular shape in a side view, as shown in FIGS. 2 and 3. The openings 19 and 20 are, as shown in FIG. 4 to FIG.
At least, the ceiling surface 22 is formed so as to be inclined downward from the drainable pavement layer 11 toward the flowing water channel 18, and a lower space 22 which is an example of a flowing water portion is formed below the lower surface.
a is formed. In addition, the drainage pavement layer 11 and the opening 1
In order to improve the drainage effect by improving the communication between the drainage pavement layers 9 and 20, the front end of the drainage pavement layer 11 extends to the bottom of the openings 19 and 20 to form a water permeable portion 22b. Further, an upper space 23 for collecting and inspecting water is formed between the upper surface of the leading end of the drainage pavement layer 11 and the ceiling surface 22 of the openings 19 and 20.

Another configuration of the present embodiment will be described. As shown in FIG. 5, in order to increase the mechanical strength of the drain groove block A, reinforcement bars 24 are arranged inside the drain groove block main body 17 throughout. Has been streaked. Further, as shown in FIG. 1, a hanging hook 25 is attached to the ceiling 16.

Next, the procedure for installing the drain groove block A having the above-described configuration on the road 12 will be described.
First, as shown in FIG. 6, considering the height from the bottom of the drain groove block A to the openings 19 and 20, a horizontal drain for placing the drain groove block A on one side of the road 12. The groove block mounting surface 17a is formed. The drain groove block A is mounted on the drain groove block mounting surface 17a such that the openings 19 and 20 face the drainage pavement layer 11 at the same height. Next, the leading end of the drainage pavement layer 11 is opened with openings 19 and 20.
To improve the communication between the drainage pavement layer 11 and the openings 19, 20. By placing a flower bed or the like on the upper surface of the ceiling 16 of the drain groove block main body 17 as necessary, the installation work of the drain groove block A on the road 12 is completed.

As described above, in the present embodiment, the drain groove block main body 17 includes the flat bottom 13, the left and right side walls 14 and 15 erected on both sides of the bottom 13, and the left and right sides. Flat ceiling 1 connecting the upper parts of walls 14 and 15
6 is preliminarily formed into a cylindrical shape having a flat hollow cross section, so that the drain groove block main body 17 is simply installed on the drain groove block mounting surface 17a, and the drain groove block A is connected to the road 12. Installation work can be completed. That is, at the interchange of the highway, at the junction, at the median strip, etc.
It can be installed easily, quickly, and safely, and the construction cost can be significantly reduced. The cross section of the flowing water channel 18 is wider in width than its height and the lower corners on both sides are smoothly rounded.
The accumulated matter in the flowing water channel 18 can be easily taken out to the outside through 0, and the drainage can be easily managed.

(Second Embodiment) As shown in FIG.
The drain groove block A1 according to the present embodiment has substantially the same configuration as the drain groove block A according to the first embodiment, but has the following difference in the configuration of the opening 26. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals. As shown in FIG. 8, an opening 26 is formed in the right side wall 15 of the drain groove block body 17.
Is provided, and a flowing water portion 29 formed below the opening 26 is
It is formed in accordance with the height of the drainage pavement layer 30.

More specifically, a notch 27 is formed on the front side of the flowing water portion 29 by cutting the bottom surface of the opening 26 into an L-shape.
The drainage pavement layer 30 is extended to the notch 27, and the notch 27 and the drainage channel 18 of the drain groove block main body 17 are extended.
(See FIG. 8) by a plurality of small holes 31 having a downward slope. Opening 2
An inspection space 28 is formed in the upper part of the nozzle 6.

With the above structure, the drainage pavement layer 30
Can be quickly collected in the flow channel 18 of the drain groove block main body 17 through the notch 27 and the small hole 31 and, if necessary, the flow channel of the drain groove block main body 17 through the inspection space 28. Inspection of 18, if soil and the like are deposited, a scraping rod or the like can be inserted and removed to the outside.

(Third Embodiment) As shown in FIGS. 9 and 10, a drain groove block A2 according to the present embodiment is
It has substantially the same configuration as the drain groove block A according to the first embodiment, but has the following difference in the configuration of the opening 32. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals. FIG.
As shown in FIG. 10, the opening 32 provided in the right side wall portion 15 of the drain groove block main body 17 has a flowing water portion 33 formed below the opening 32 and an inspection space 34 formed above the opening.
It is composed of Specifically, the flowing water portion 33 is formed by providing a large number of small holes 36 at a position corresponding to the drainable pavement layer 35 on the right side wall portion 15 of the drain groove block main body 17. On the other hand, the inspection space 34 is
Is formed by the upper space of the opening 32 located above.

With the above-described structure, rainwater can quickly flow into the flow channel 18 of the drain groove block body 17 through the opening 32 and can be drained, and at the same time, sand and gravel enter the flow channel 18 of the drain groove block body 17. Can be prevented. Also,
If necessary, the flow channel 18 of the drain groove block main body 17 is inspected through the inspection space 34, and when soil and the like are accumulated, a scraping rod or the like can be inserted and removed to the outside.

(Fourth Embodiment) As shown in FIG. 11, a drain groove block A3 according to the present embodiment has substantially the same configuration as the drain groove block A according to the first embodiment. However, the configuration of the opening 37 has the following differences. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals. As shown in FIG. 11, an opening 37 provided in the right side wall portion 15 of the drain groove block main body 17 is provided with a flowing water portion 38 formed below the opening 37.
And an inspection space 39 formed on the upper part thereof. Specifically, the flowing water portion 38 is provided in the drain groove block main body 1.
7 is formed by connecting a water-permeable block 41 made of a porous material in a portion corresponding to the drainable pavement layer 40 on the right side wall portion 15. On the other hand, the inspection space 39 is formed by an upper space of the opening 37 located above the flowing water portion 38.

With the above-described structure, rainwater (permeation flow of the drainable pavement layer 40) can quickly flow into the flow channel 18 of the drain groove block main body 17 through the opening 37 to be drained, and sand and gravel can be drained from the drain groove block. Running water channel 18 of main body 17
Can be prevented. In addition, if necessary, the flow channel 18 of the drain groove block main body 17 can be passed through the inspection space 39.
Is checked, and if sediment or the like is accumulated, a scraping rod or the like can be inserted and removed to the outside.

(Fifth Embodiment) As shown in FIG. 12, a drain groove block A4 according to the present embodiment has substantially the same configuration as the drain groove block A according to the first embodiment. However, the configuration of the opening 42 has the following differences. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals.

As shown in FIG. 12, the opening 42 provided in the upper part of the right side wall 15 of the drain groove block main body 17 is
2 is formed of a flowing water portion 43 formed at a lower portion of the cooling water passage 2 and a group of flowing water holes 44 formed at an upper portion thereof and through which a surface flow of the drainable pavement layer 45 passes. Specifically, the flowing water portion 43 is the right side wall portion 15 of the drain groove block main body 17 and the drainage pavement layer 45.
Are formed by a plurality of circular small holes 46 arranged at intervals corresponding to the longitudinal direction. On the other hand, the flowing water hole group 44 is formed by providing a plurality of vertical holes 48 at parallel intervals in the longitudinal direction above the flowing water portion 43.

With the above-described configuration, rainwater (permeate flow of the drainable pavement layer 45) can quickly flow into the flowing water channel 18 of the drain groove block body 17 through the flowing water portion 43 to be drained, and small animals can be drained. Can be prevented from entering the flowing water channel 18.

(Sixth Embodiment) As shown in FIG. 13, a drain groove block A5 according to the present embodiment has substantially the same configuration as the drain groove block A according to the first embodiment. However, the configuration of the opening 49 has the following differences. Note that, in the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals.

As shown in FIG. 13, the opening 49 provided in the right side wall portion 15 of the drain groove block main body 17 has an annular mounting step portion 50 which is an example of a cutout frame on its opening surface. A porous filter 51 (which may be a lattice filter) is detachably attached to the attachment step 50. The flowing water portion is formed by a small hole 52 having a downward slope that connects the lower portion of the annular mounting step portion 50 and the flowing water passage 18 of the drain groove block main body 17 in communication.

With the above structure, the drainage pavement layer 5
3. Rainwater can quickly flow into the drainage channel 18 of the drain groove block main body 17 through the porous filter 51 and the small holes 52 to be drained, and reliably prevent sand and gravel from entering the drain groove block main body 17. can do. In addition, by removing the porous filter 51 as necessary, the flowing water channel 18 of the drain groove block main body 17 is inspected, and if soil and the like are accumulated, a scraping rod or the like is inserted to the outside. Can be removed.

(Seventh Embodiment) As shown in FIG. 14, a drain groove block A6 according to the present embodiment has substantially the same configuration as the drain groove block A according to the first embodiment. However, it is characterized in that the entire length is halved and the opening 54 is made one. By doing so, the weight of the drain groove block A6 can be reduced, and transport and installation work can be easily performed.

As described above, the present invention has been described with reference to some embodiments. However, the present invention is not limited to the configurations described in the above embodiments, and claims This also includes other embodiments and modifications that can be considered within the scope of the described matters. For example, in the above-described embodiment, the cross-sectional shape of the drain groove block main body is a flat hollow cross-section, but may be a hollow elliptical cross-section or a hollow rectangular cross-section. Further, a reflection mirror, a light emitting diode, or the like can be attached to the surfaces of the left and right side walls of the drain groove block main body.

[0036]

In the drain groove block according to the first and second aspects of the present invention, a wide opening serving also as an inspection hole is formed in one upper part of the side wall part, and the water passing through the drainable pavement layer is formed in the lower part of the opening. A flowing water part into which the water flows is formed. Therefore, simply installing the drain groove block on the drain groove block mounting surface can complete the installation work of the drain groove block on the road while ensuring a sufficient drain function. In other words, at the interchange of the highway, at the junction, at the median strip, etc.
It can be installed quickly and safely, and the construction cost can be significantly reduced. In addition, the cross section of the water channel is wider than its height and the lower corners on both sides are smoothly rounded. Management becomes easier.

In the drainage groove block according to the present invention, since the drainage pavement layer is formed on the bottom surface of the opening to have a partially permeable permeable portion, the drainage pavement layer is formed from the drainage pavement layer. Can be more reliably and smoothly flown into the flowing water channel.

In the drain groove block according to any one of claims 3 to 7, the cross section of the flowing water channel has a width that is wider than its height.
The lower corners on both sides are smoothly rounded, and a wide opening that also serves as an inspection hole is formed in the upper part on one side of the side wall,
At the lower part of the opening, a flowing part through which the seepage flow of the drainage pavement layer passes is formed in accordance with the height of the drainage pavement layer.
Therefore, not only can the seepage flow smoothly and reliably flow down the drainage pavement layer through the drainage pavement layer, but also rainwater can flow down the drainage pavement layer through the surface of the drainage pavement layer,
Drainage efficiency can be improved. In addition, a sufficiently large inspection space can be ensured at the upper part of the opening, inspection and cleaning of the drain can be easily performed, and drainage management can be easily performed.

In the drain groove block according to the fourth aspect, since the water flow portion is formed from a plurality or a large number of small holes penetrating the side wall portion, sand, gravel, and the like flow into the water channel of the drain groove block main body. It can be prevented from entering.

In the drain groove block according to the fifth aspect, a notch whose upper part communicates with the opening is formed on the front side of the flowing water portion in accordance with the height of the drainage pavement layer.
The drainage pavement layer and the flowing water section can be reliably connected, and the drainage efficiency can be improved from this aspect as well.

In the drain groove block according to the sixth aspect, the flowing water portion is formed of a water-permeable block made of a porous material, so that sand, gravel and the like can be prevented from entering the flowing water channel of the drain groove block body. In the drain groove block according to the seventh aspect, a notch frame common to these is provided on the front side of the opening and the flowing water portion, and a porous filter or a lattice filter is mounted on the notch frame. . Therefore,
The rainwater can quickly flow into the drain channel of the drain groove block body and drain, and can surely prevent sand and gravel from entering the drain groove block body. In addition, if necessary, remove the porous filter to check the water channel of the drain block main body, and if there is sediment, insert a scraping rod and remove it outside. Can be.

In the drain groove block according to the eighth aspect, the cross section of the flowing water channel is wider in width than its height, the lower corners on both sides are smoothly rounded, and the upper part of the side wall has one side. A flow hole group consisting of a plurality of vertical holes connected to the flowing water channel and through which the surface flow of the drainage pavement layer constructed on the side passes is formed, and a plurality or a number of small holes are formed below the flowing water hole group. The flowing water portion through which the permeation flow of the drainable pavement layer passes is formed by the holes. Therefore, rainwater flows through a group of holes (vertical holes)
Through the canal to drain quickly,
It is possible to prevent small animals such as rats from entering the drainage channel main body through the small holes.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state where a drain groove block according to a first embodiment of the present invention is installed on a highway.

FIG. 2 is an overall perspective view of the drain groove block according to the first embodiment of the present invention.

FIG. 3 is a side view of the same.

FIG. 4 is a front view of the same.

FIG. 5 is a front sectional view of the same.

FIG. 6 is a front view showing the installation state.

FIG. 7 is an enlarged front view of the main part.

FIG. 8 is an enlarged front view of a main part of a drain groove block according to a second embodiment of the present invention.

FIG. 9 is an enlarged front view of a main part of a drain groove block according to a third embodiment of the present invention.

FIG. 10 is an enlarged side view of the main part.

FIG. 11 is an enlarged front view of a main part of a drain groove block according to a fourth embodiment of the present invention.

FIG. 12 is an enlarged side view of a main part of a drain groove block according to a fifth embodiment of the present invention.

FIG. 13 is an enlarged front view of a main part of a drain groove block according to a sixth embodiment of the present invention.

FIG. 14 is an overall perspective view of a drain groove block according to a seventh embodiment of the present invention.

FIG. 15 is a perspective view of a conventional drain groove block.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS A Drain groove block A1 Drain groove block A2 Drain groove block A3 Drain groove block A4 Drain groove block A5 Drain groove block A6 Drain groove block 10 Asphalt pavement 11 Drainable pavement layer 12 Road 13 Bottom part 14 Left side wall part 15 Right side wall part 16 Ceiling Part 17 Drain groove block main body 17a Drain groove block mounting surface 18 Flow channel 19 Opening 20 Opening 21 Horizontal mounting surface 22 Ceiling surface 22a Lower space 22b Water permeable portion 23 Upper space 24 Reinforcing bar 25 Hanging hook 26 Opening 27 Notch 28 Inspection space 29 Running water part 30 Drainable pavement layer 31 Small hole 32 Opening 33 Running water part 34 Inspection space 35 Drainable pavement layer 36 Small hole 37 Opening 38 Running water part 39 Inspection space 40 Drainable pavement layer 41 Permeable block 42 Opening 43 Running water Part 44 running water hole group 45 drainage pavement layer 4 Small holes 48 the longitudinal hole 49 opening 50 annular attachment step part 51 porous filter 52 small holes 53 drainage pavement layer 54 opening

Claims (8)

[Claims] A bottom portion having a flat bottom surface, a side wall portion connected to both sides of the bottom portion, and a ceiling portion connecting the side wall portions on both sides are integrally formed to form a flowing water channel therein; A drain groove block for collecting rainwater flowing from a drainage pavement layer, wherein the cross section of the water channel is wider than its height, and the lower corners on both sides are smoothly rounded; A wide opening which also serves as an inspection hole is formed at an upper portion on one side of the portion, and a flow portion into which water passing through the drainage pavement layer flows is formed at a lower portion of the opening. block. 2. The drain groove block according to claim 1, wherein a water-permeable portion partially formed by extending the drainage pavement layer is formed on a bottom surface of the opening. 3. A bottom portion having a flat bottom surface, a side wall portion connected to both sides of the bottom portion, and a ceiling portion connecting the side wall portions on both sides are integrally formed to form a flowing water channel inside. A drain groove block for collecting rainwater flowing from a drainable pavement layer, wherein a cross section of the water channel is wider than its height, and lower corners on both sides are smoothly rounded. A wide opening also serving as an inspection hole is formed on one side of the upper part of the drainage pavement layer, and a flowing part through which the seepage flow of the drainage pavement layer passes is formed at a lower part of the opening according to the height of the drainage pavement layer. A drain groove block characterized by being formed in the shape of a drain. 4. The drain groove block according to claim 3, wherein the flowing water portion is formed by a plurality or a large number of small holes penetrating the side wall portion. 5. The drain groove block according to claim 4, wherein a cutout having an upper portion communicating with the opening is formed on a front side of the flowing water portion in accordance with a height of the drainage pavement layer. 6. The drain groove block according to claim 3, wherein the water flow portion is formed of a water-permeable block made of a porous material. 7. On the front side of the opening and the flowing water portion,
The drain groove block according to claim 3, wherein a notch frame common to these is provided, and the notch frame is provided with a porous filter or a lattice filter. 8. A bottom portion having a flat bottom surface, a side wall portion connected to both sides of the bottom portion, and a ceiling portion connecting the side wall portions on both sides are integrally formed to form a flowing water channel therein. A drain groove block, wherein the cross section of the water channel is wider in width than its height, the lower corners on both sides are smoothly rounded, and the upper part of the side wall is connected to the water channel. A flowing water hole group consisting of a plurality of vertical holes through which the surface flow of the drainage pavement layer constructed on the side passes is formed, and a plurality or small holes are formed below the flowing water hole group. A drain section through which a permeation flow of the drainage pavement layer passes.