JP2003253744A - Side ditch structure of drainage pavement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side ditch structure of drainage pavement with extremely high drainage capacity which has enough load bearing capacity even when car tire passes over on the lid, and does not require formation of a cutout section for passing water in the lid. <P>SOLUTION: A vertically rugged member 10 with projections and recessions is integrally molded to an apron portion 4 of an L-shaped block 1 with water- impermeable concrete 7, and at least a top of projecting part 11 of a supporting stepped section 8 of the drainage ditch 6 is being exposed. The permeable pavement material 13 is laid on the vertically rugged member 10, and a driveway side edge of the lid 16 is supported on the projecting part 11 of the exposed water-impermeable concrete 7. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gutter structure constructed by using a concrete block having a substantially L-shaped cross section (hereinafter, simply referred to as "L-shaped block") in a gutter portion of drainage pavement, More specifically, the present invention relates to a gutter structure for drainage pavement in which a lid is arranged on a drainage groove formed in an L-shaped block.

[0002]

2. Description of the Related Art Conventionally, an L-shaped block is arranged in a gutter located between a roadway and a sidewalk, and an apron portion of the L-shaped block is formed by inclining downwardly toward the sidewalk. Rainwater was made to flow along the boundary between the lower end of the slope and the rise of the curb on the sidewalk, and was drained to the catchment basin.

However, such a conventional gutter structure has a low drainage capacity. In recent years, the demand for barrier-free construction has increased, and the structure has been changed so that wheelchairs and the like can easily pass through by eliminating steps in pedestrian roads and grading the lateral and longitudinal slopes of sidewalks. Under such a tendency, the gradient of the apron portion on the roadway side must be made gentle, so that water is likely to accumulate and the drainage capacity of the conventional L-shaped ditch is insufficient. Furthermore, since the slope on the sidewalk side becomes gentle, water easily collects. To eliminate this, drainage pavement is laid on the waterproof layer, and rainwater on the sidewalk side is drained by flowing it into the L-shaped gutter. This also causes the drainage capacity of the L-shaped gutter to be insufficient. Therefore, in order to improve the drainage capacity, L
A drain with a U-shaped cross section is formed along the boundary with the rise of the curb in the apron of the U-shaped block, and the upper surface of this drain has a U-shaped cross section with a plurality of drain holes. The gutter structure covered with (lid) is drawing attention. This L-shaped block has a structure in which jaw-shaped support steps are formed on both sides of the upper end of the drainage groove, and the support steps support the legs on both sides of the lid.

[0004]

By the way, in recent years, drainage pavement in which a water-permeable asphalt is laminated on a water-impermeable asphalt has been adopted from the viewpoint of preventing vehicle slippage, and the apron portion of the L-shaped block is also used. Non-permeable ordinary concrete and permeable porous concrete are sequentially laminated. Furthermore, a notch for water passage is formed in the leg of the lid on the side of the roadway to guide rainwater from the drainage pavement side of the roadway into the drainage ditch to supplement the drainage capacity.

In the conventional drainage pavement ditch structure, non-water-permeable ordinary concrete and water-permeable porous concrete are sequentially laminated on the apron part of the L-shaped block, and the road side leg of the lid is placed on the porous concrete. Although it supports and covers the drainage groove, porous concrete has the advantage of having water permeability, but is weak in strength, and when a tire such as a truck is placed on the lid, a load is applied to the porous concrete through the lid, It was easily damaged.

Further, in order to supplement the drainage capacity, a notch portion for water passage is formed on the side surface (leg portion) of the lid. However, when this notch portion is formed, the surface pressure acting on the porous concrete is further increased. Since it increased, it was easier to damage. Further, if the notch is formed large to improve drainage, there is also a problem that the strength of the lid is reduced.

The present invention has been made in view of such circumstances, and an object thereof is to have a sufficient supporting force even when a tire passes over the lid, and a notch portion for passing water through the lid. It is an object of the present invention to provide a ditch structure for drainage pavement that does not need to be formed and has an extremely high drainage capacity.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and the object of claim 1 is to provide an L-shaped concrete block in the gutter of drainage pavement. The drain groove is formed along the boundary between the apron portion of the L-shaped block and the rising edge of the curb portion, and the support step portions are formed at both ends of the drain groove. In the gutter structure of the drainage pavement in which the lid covering the lid is supported by the support step portion, the apron portion of the L-shaped block is integrally formed with an uneven portion toward the rising with impermeable concrete, and the drain groove is formed. The roadside edge of the lid is formed by laminating a water-permeable pavement material on the uneven portion with at least the upper surface of the convex portion of the roadside groove of the vehicle being exposed, and using the exposed upper surface of the convex portion made of non-water-permeable concrete as a supporting step. Support A gutter structure drainage pavement according to claim Rukoto.

According to a second aspect of the present invention, the bottom surface of the concave and convex portions formed on the apron portion of the L-shaped block is inclined toward the drain groove at an angle steeper than the water gradient on the upper surface of the apron portion. The ditch structure of the drainage pavement according to claim 1, wherein the ditch structure is inclined downward.

According to a third aspect of the present invention, the water-permeable pavement material is porous concrete and is integrally formed with the L-shaped block.
Alternatively, the ditch structure of the drainage pavement according to claim 2 is provided.

According to a fourth aspect of the present invention, the water-permeable pavement material is a water-permeable asphalt, which is constructed when the pavement asphalt is laid on a roadway. It is a ditch structure of natural pavement.

According to a fifth aspect of the present invention, a through passage communicating with the drain from the sidewalk is provided in the lower portion of the curb portion. It is a ditch structure of drainage pavement.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a ditch structure of the drainage pavement in the first embodiment, (a) is a left side view thereof, and (b) is a front view seen from the road side.

In the gutter structure of this embodiment, the apron portion of the L-shaped block 1 is constructed by laminating water-permeable concrete on non-water-permeable ordinary concrete. It is arranged in a gutter located between the sidewalks 3. The L-shaped block 1 is a concrete block whose side surface is literally L-shaped, and has an apron portion 4 extending toward the center of the road 2 and a side of the sidewalk 3 from the base end of the apron portion 4. Mainly composed of a curb part 5 rising to the upper surface of the rim part, and an apron part 4
A drain groove 6 having a substantially U-shaped cross section is formed along the boundary with the rising edge of the curb portion 5. Then, a support step portion 8 is formed at the left and right groove edge portions of the drainage groove 6, specifically, a road edge side groove edge portion, and a support step portion 9 is formed at the sidewalk side groove edge portion. 9 is used to support a lid described later.

The height of the curb portion 5 is set as the height from the ground surface on which the L-shaped block 1 is arranged to the upper surface of the sidewalk 3, and the extension length of the apron portion 4 is the L-shaped block. 1 is set in consideration of the stability when arranging No. 1 and the road width. In this embodiment, the length of the L-shaped block 1 in the longitudinal direction is set to about 2000 mm.

The L-shaped block 1 is molded in the first stage by filling a water-permeable porous concrete 15 into a molding die (not shown), and then the ordinary concrete 7 is filled and inverted at the time of demolding. It Due to the die-cutting relationship, the side face shape of the curb portion 5 is formed so as to be gradually narrowed upward. In the present embodiment, the drain groove 6 is set to have a U-shaped cross-sectional shape in consideration of the flow velocity, die cutting, etc., but the cross-sectional shape is not limited to this embodiment.

Also, the apron portion 4 of the L-shaped block 1
The concavo-convex portion 10 is formed on the lower layer. The concavo-convex portion 10 of the present embodiment is provided in the width direction of the road, that is, the drain groove 6 described above.
Toward the bottom, for example, a convex portion 11 and a concave portion 12 having a width of 200 mm
Are formed so that they are located alternately. That is, the convex portions 11 and the concave portions 12 having a width of 200 mm are formed so as to be orthogonal to the straight drainage grooves 6 alternately. In this embodiment, the height difference between the convex portion 11 and the concave portion 12 is set to 20 mm, for example. Further, in terms of die-cutting, the side surface taper is formed so that the convex portion 11 is gradually narrowed upward and the concave portion 12 is gradually widened upward.

In the present embodiment, the porous concrete 13 is laminated as the water-permeable pavement material on the uneven portion 10 integrally formed with the apron portion 4 of the L-shaped block 1, but when the layers are laminated, the drain groove 6 is formed. Convex 1 at the side of the roadway
1 is laminated so that at least the upper surface thereof is exposed. That is, the lid 16 as a lid that covers the upper portion of the drainage groove 6
(See FIG. 2 (b)) The porous concrete 13 is not laminated on the convex portion 11 corresponding to the supporting step portion 8 for supporting the convex upper surface, and the concave portion 12 is formed in the groove portion. The porous concrete 13 so that it is flush with the convex portion 11
To fill. The concave portion 1 in the portion corresponding to the groove edge portion
The filling of the porous concrete 13 into 2 is not essential. When the porous concrete 13 is used as the water-permeable pavement material as in the present embodiment, after pouring the porous concrete 15 in the mold of the L-shaped block 1, the ordinary concrete 7 is added as the second step to integrate the concrete. Mold.

Then, as shown in FIG. 2, the legs of the lid 16 having a U-shaped cross section are placed and supported on the support step 9 and the support step 8 of the drainage groove 6 to support the drainage groove 6. Cover the top. That is, the foot portion of the lid 16 on the sidewalk side is the support step portion 8
The leg portions on the side of the road are supported on the upper surface of the exposed convex portion 11, and the both leg portions of the lid 16 can be supported on the ordinary concrete 7.
Therefore, even if a tire of a truck or the like passes over the lid 16, the strong ordinary concrete 7 supports both side edges of the lid 16, so that a sufficient supporting force is provided.

The drainage pavement of the road 2 is constructed by laying a non-water-permeable asphalt layer 21 on a base and laminating a water-permeable asphalt layer 22 on the non-water-permeable asphalt layer 21. 21 sidewalk end is
The apron portion 4 of the L-shaped block 1 is laid so as to be flush with the roadside end of the convex portion 11, and the sidewalk-side end of the water-permeable asphalt layer 22 is on the apron portion 4 of the L-shaped block 1. The porous concrete 13 is laminated so as to be flush with the roadside end. A tack coat 23 is provided between the water-impermeable asphalt layer 21 and the water-permeable asphalt layer 22 and between the water-impermeable asphalt layer 21 and the L-shaped block 1 in order to improve water-tightness. ing.

When it rains, the rainwater on the roadway 2 does not enter the impermeable asphalt layer 21 on the ground, but passes through the impregnated permeable asphalt layer 22 and the apron part of the L-shaped block 1. 4, flows into the water-permeable porous concrete 13, passes through the concave portions 12 of the concave-convex portion 10, and flows into the drain groove 6. Therefore, it is not necessary to form a cutout portion for water passage on the side surface (leg portion) of the lid 16, and it is possible to provide a gutter structure for drainage pavement having an extremely high drainage capacity.

In FIGS. 1 and 2A, the bottom surface of the concave portion 12 of the uneven portion 10 in the apron portion 4 of the L-shaped block 1 is gentle enough to follow the inclination of the water gradient formed on the upper surface of the apron portion 4. 2 (b), the bottom surface of the recess 12 is slanted downward toward the drain groove 6 at a steeper angle than the inclination angle (water gradient) of the apron portion 4 as shown in FIG. 2 (b). It may be inclined to. When the bottom surface of the recess 12 is thus steeply inclined, the inflow speed of rainwater into the drainage groove 6 can be increased. Therefore, even if the water drainage of the apron portion 4 cannot be enhanced by making the angle steep from the viewpoint of preventing slippage of the bicycle, it is easy to steeply incline the bottom surface of the recess 12 to enhance the water drainage. Is.

FIG. 3 shows a ditch structure of the second embodiment. (A) is a side view when the bottom surface of the recess is not steep, and (b) is a bottom surface of the recess. It is a side view at the time of having it. As shown in the figure, in the second embodiment, the water-permeable porous concrete 1 is attached to the roadside end of the uneven portion 10 in the apron portion 4 of the L-shaped block 1.
No. 3 is not laminated, and the water-permeable asphalt layer 22 is laminated including the above-mentioned step when the paving asphalt of the roadway 2 is constructed.

By forming in this way, the discontinuous portion 24 of the water-permeable asphalt layer 22 and the porous concrete 13 is located on the non-water-permeable ordinary concrete 7 of the L-shaped block 1, so that the discontinuous portion is concerned. Water leakage at 24 can be prevented.

FIG. 4 shows a ditch structure of the third embodiment. (A) is a side view when the bottom surface of the recess is not steep, and (b) is a bottom surface of the recess. It is a side view at the time of having it. As shown in the figure, in the third embodiment, a recess 25 is formed at the end of the apron portion 4 of the L-shaped block 1 on the side of the roadway, and the recess 25 is not formed on the roadway 2 when the paving asphalt is constructed. The water-permeable asphalt layer 21 is laminated, and the step portion is formed without laminating the water-permeable porous concrete 13 on the roadway side end of the uneven portion 10 in the apron portion 4 of the L-shaped block 1 to form the paving asphalt of the roadway 2. The water-permeable asphalt layer 22 is laminated up to the step portion at the time of construction.

By forming in this way, the discontinuous portion 26 of the water-impermeable asphalt layer 21 and the L-shaped block 1 is formed by the water-impermeable ordinary concrete 7 of the L-shaped block 1. 25, and a discontinuous portion 27 between the water-permeable asphalt layer 22 and the porous concrete 13 is formed by ordinary concrete 7
Since it is located on the apron portion 4 of the letter-shaped block 1, it is possible to prevent water from leaking to the ground at both discontinuous portions 26 and 27.

FIG. 5 shows a ditch structure of the fourth embodiment. (A) is a side view when the bottom surface of the recess 12 is not steep, and (b) is a steep bottom surface of the recess 12. It is a side view at the time of giving an inclination. As shown in the figure, in the fourth embodiment, the concavo-convex portion 10 is integrally formed on the apron portion 4 of the L-shaped block 1, but the concavo-convex portion 10 is formed during block molding.
When the paving asphalt for the road 2 is constructed, the uneven portion 10 is not laminated on top of porous concrete as a water-permeable paving material.
A water-permeable asphalt layer 22 is constructed as a water-permeable pavement material on the top. As described above, when the water-permeable asphalt layer 22 is formed on the uneven portion 10 during the construction of the pavement asphalt, as shown in FIG.
As a blind material having a width to become the supporting step portions 8 and 9 of
8 is on the drainage groove 6, more specifically, one side of the square bar 28 is a support step 9
Place it on the table. Then, the water-permeable asphalt layer 22 is laid in this state, and then the timber 28
When this is removed, the end of the convex portion 11 is exposed at the edge of the groove on the road side, and this exposed portion becomes the support step portion 8.

In this embodiment, the porous concrete is not laminated on the uneven portion 10 at the time of forming the block, and the uneven portion 10 is simultaneously formed when the water-permeable asphalt layer 22 of the road is applied.
Since permeable asphalt is laminated on top, there is no discontinuity in the permeable pavement material between the road surface and the gutter,
This makes it easier to adjust the leveling of the water-permeable pavement material and improves the appearance.

FIG. 7 shows a ditch structure of the fifth embodiment. FIG. 7 (a) shows a side surface when the recess 12 is formed over the entire width of the apron portion 4 and the bottom surface thereof is not steeply inclined. Drawing (b) is a side view when crevice 12 is formed in a part of apron part 4 (about half of the sidewalk side), and (c) is a side view of the state after construction. In the fifth embodiment, as in the case of the fourth embodiment, the water-permeable asphalt layer 22 is used as the water-permeable pavement material on the uneven portion 10 in the apron portion 4 of the L-shaped block 1 when the pavement asphalt for the road 2 is constructed. At this time, the angle-shaped anchor wall portion 29 is installed in front of the support step portion 8 supported by the lid 16. The recess 12 penetrates under the anchor wall 29 in any case.

In this embodiment, since the anchor wall portion 29 is erected, the water-permeable asphalt layer 22 can be laid even if the drainage groove 6 is not covered with a blind material, and the laid water-permeable asphalt layer is provided. The side edge of 22 on the sidewalk is not easily damaged.
Then, as in the above-described embodiment, the porous concrete is not laminated on the uneven portion 10, and the water-permeable asphalt layer 22 is used.
Since only the construction is performed, discontinuity does not exist in the water-permeable pavement material, and it is easy to adjust the level of the water-permeable pavement material.

In another embodiment shown in FIGS. 8 and 9, the pavement on the sidewalk 3 side is a drainage pavement with a gentle slope, and rainwater on the sidewalk side is also introduced into the drain groove 6 of the L-shaped block 1 for drainage. Specifically, the waterproof layer 31 is laid on the upper surface of the water impermeable base layer 30, and a drainage pavement material 32 such as water permeable asphalt or porous concrete is laid on the waterproof layer 31.

In each of the L-shaped blocks 1 shown in FIGS. 8 and 9, as in the embodiment shown in FIG. 2 (b), the apron portion 4 is provided with an uneven portion 10 having an inclined concave portion 12. In the L-shaped block 1 of FIG. 8, a through-flow passage 33 communicating with the drainage groove 6 from the sidewalk side is obliquely opened in the lower part of the curb portion 5, and the inclined lower end of the waterproof layer 31 is the through-flow passage 33. The rainwater soaked in the drainage pavement 32 is configured to be located at the same height as or slightly higher than the opening edge so as to flow into the drainage groove 6 from above the waterproof layer 31 through the through flow passage 33. I am doing it. In the L-shaped block 1 shown in FIG. 9, the lower part of the curb portion 5 on the sidewalk side is projected, and the receiving groove 35 is formed on the upper surface of the protruding portion 34.
At the bottom of the channel, the through-flow passage 36 communicating with the drain 6 from the sidewalk side
Is obliquely opened, and the inclined upper end of the through-flow channel 36 is connected to the receiving groove 35 so that the inclined lower end of the waterproof layer 31 overlaps the receiving groove 35 and is located at the same height or slightly above. , The rainwater soaked in the drainage pavement 32 is the waterproof layer 3
1 is configured to flow into the receiving groove 35 from above and to flow into the drain groove 6 through the inside of the through flow path 36. With this configuration, the rainwater flowing down on the waterproof layer 31 flows from the receiving groove 35 into the through-flow passage 36, so that the rainwater on the sidewalk 3 side can be reliably introduced into the drainage groove 6 for drainage treatment.

[0033]

As described above, the present invention has the following effects. According to the invention as set forth in claim 1, an uneven portion is integrally formed on the apron portion of the L-shaped block with impermeable concrete toward the rising of the curb portion, and at least the convex portion at the roadside groove portion of the drainage groove is formed. Laying a water-permeable pavement material on the uneven part with the upper surface of the part exposed,
Even if the upper layer of the apron is composed of water-permeable pavement material, the exposed upper surface of the convex portion made of non-water-permeable concrete supports the edge of the lid on the side of the roadway. The convex portion firmly supports the lid. Therefore, even if a tire such as a truck passes over the lid, it has a sufficient supporting force. Further, since rainwater on the road mainly passes through the concave portion of the uneven portion formed on the apron portion of the L-shaped block and flows into the drainage groove, it is necessary to form a cutout portion for water passage on the side surface of the lid. Thus, it is possible to provide a ditch structure for drainage pavement having extremely high drainage capacity.

According to the second aspect of the invention, the concave bottom surface of the concave and convex portion formed on the apron portion of the L-shaped block is
Since it is inclined obliquely downward toward the drain groove at a steeper angle than the water gradient on the upper surface of the apron, it is possible to increase the drainage capacity by increasing the inflow speed of rainwater into the drain groove.

According to the third aspect of the present invention, the water-permeable pavement material is porous concrete and is integrally molded with the L-shaped block, so that it can be installed on site like a conventional L-shaped block and is easy to handle. Is.

According to the invention described in claim 4, since the water-permeable pavement material is water-permeable asphalt and the construction is carried out when laying the roadway pavement asphalt, discontinuity of the water-permeable pavement material is avoided. Therefore, leakage from the discontinuous portion can be prevented.

According to the fifth aspect of the present invention, since the through-flow passage communicating from the sidewalk to the drain is formed in the lower part of the curb, rainwater on the side of the walk is also introduced into the drain for wastewater treatment. be able to. Therefore, the pavement on the sidewalk can be made of a water-permeable pavement material, and the wastewater can be sufficiently treated even if the slope of the sidewalk is gentle.

[Brief description of drawings]

FIG. 1 shows a ditch structure of drainage pavement in a first embodiment, (a) is a side view thereof, and (b) is a front view thereof.

2A and 2B show a state after pavement asphalt construction in the gutter structure of the first embodiment. FIG. 2A is a side view when the bottom surface of the recess is not steep, and FIG. It is a side view at the time of giving a steep bottom.

FIG. 3 shows a gutter structure of a second embodiment,
(A) is a side view when the bottom surface of the recess is not steep, and (b) is a side view when the bottom surface of the recess is steep.

FIG. 4 shows a gutter structure of a third embodiment,
(A) is a side view when the bottom surface of the recess is not steep, and (b) is a side view when the bottom surface of the recess is steep.

FIG. 5 shows a gutter structure of a fourth embodiment,
(A) is a side view when the bottom surface of the recess is not steep, and (b) is a side view when the bottom surface of the recess is steep.

FIG. 6A is a side view showing a state during paving asphalt construction, and FIG. 6B is a side view showing a state after paving asphalt construction in the gutter structure of the fourth embodiment.

FIG. 7 shows a gutter structure of a fifth embodiment,
(A) is a side view in which a recess is formed over the entire width of the apron portion and an anchor wall portion is formed, and (b) is a side view in which the recess portion is formed on a part of the apron portion on the drain groove side and the anchor wall portion is formed. The side view when formed, (c) is a side view of the state after construction.

FIG. 8 is a side view showing a state after the construction of the gutter structure of the sixth embodiment in which a through flow path is opened in a curb portion.

FIG. 9 is a side view showing a state after construction of the gutter structure of the seventh embodiment in which a through-flow passage is formed in the curb portion and a receiving groove is formed in a portion protruding below the curb portion.

[Explanation of symbols]

1 L-shaped block 2 way 3 sidewalks 4 Apron part 5 Curb part 6 drains 7 ordinary concrete 8 Roadside support steps 9 Support steps on the sidewalk 10 uneven part 11 convex 12 recess 13 Porous concrete 16 lid 21 Non-permeable asphalt 22 Water-permeable asphalt 23 Tuck coat 24 Discontinuity 25 recess 26 Discontinuity 27 Discontinuity 28 square timber 29 Anchor wall 30 Water impermeable underlayer 31 waterproof layer 32 Drainage pavement material 33,36 through flow path 34 Projection 35 receiving groove

Claims (5)

[Claims] 1. An L-shaped concrete block is arranged in the side groove portion of the drainage pavement, and a drain groove is formed along a boundary between the apron portion of the L-shaped block and the rising edge of the curb. Support steps are formed at the edges of both drainage channels,
In the gutter structure of the drainage pavement in which the lid covering the upper surface of the drainage groove is supported by the supporting step portion, in the apron portion of the L-shaped block, an uneven portion is integrally molded with impermeable concrete toward the rising. , A laminate of a water-permeable pavement material on the uneven portion in a state where at least the upper surface of the convex portion in the roadside groove portion of the drainage groove is exposed, and the exposed convex surface of the water-impermeable concrete is used as a supporting step portion of the lid. A gutter structure for drainage pavement that supports the side edge of the roadway. 2. The concave bottom surface of the uneven portion formed on the apron portion of the L-shaped block is inclined obliquely downward toward the drain groove at a steeper angle than the water gradient on the upper surface of the apron portion. The gutter structure of the drainage pavement according to claim 1. 3. The ditch structure for drainage pavement according to claim 1 or 2, wherein the water-permeable pavement material is porous concrete and is integrally formed with the L-shaped block. 4. The ditch structure for drainage pavement according to claim 1 or 2, wherein the water-permeable pavement material is water-permeable asphalt, and is constructed when laying the roadway pavement asphalt. 5. A through-flow passage communicating with the drain from the sidewalk side is formed in the lower part of the curb portion.
5. The gutter structure for drainage pavement according to claim 4.