JP2019143381A - Rainwater drainage system - Google Patents

Abstract

To provide means to enhance a drain treatment capability by efficiently bypassing an entire slope surface with a simple structure.SOLUTION: A rainwater drainage system of this invention for draining drain water on a road surface C being on an upper part of a slope surface 2 to a slope bottom drain gutter 22 which is a discharge-side facility includes: a water collecting box 23 disposed on the road surface C; a drain duct 10 that drains from the water collecting box 23 to the slope bottom drain gutter 22; and a water conveyance gutter 30 connected to the drain duct 10 for conveying the water in the water collecting box 23 to the drain duct 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rainwater drainage system that drains rainwater on a slope.

Conventionally, as a slope, there is provided a small step portion that divides the height direction of the slope surface almost horizontally, a horizontal drainage groove is provided at the small step portion, and further, vertical drainage is performed so as to intersect the horizontal drainage groove. A configuration in which a groove is provided is known. In this case, rainwater that has poured onto the slope located above the horizontal drainage ditch is received by the horizontal drainage ditch, and the accepted rainwater is guided to the vertical drainage ditch and located below the slope. It is discharged into the side groove.
Road drainage and slope drainage at the top of such slopes are often drainage facilities that drain in open water channels (U-shaped grooves, etc.), and soil collapse due to jumping and overflowing during heavy rain, especially in the collecting mass area May cause. In order to cope with such a problem, for example, a rainwater drainage system for protecting a slope from rainwater as shown in Patent Document 1 is known.

  Patent Document 1 includes a bypass drainage groove that bypasses from one upstream of the water collection mass to the downstream in the vertical drainage groove, thereby making it possible to suppress the occurrence of water jumping or overflowing of the water collection mass. Is described.

JP-A-2006-156270

  However, the conventional slope drainage system disclosed in Patent Document 1 described above has a configuration in which a bypass drainage groove is provided for each water collection mass. For example, a small step portion is provided on the slope and collected at various locations. It is not the structure which can respond to the whole slope surface where a water mass, a vertical drainage groove, and a horizontal drainage groove are provided. Therefore, when constructing equipment for the entire slope using the above-mentioned bypass drainage groove, the configuration becomes complicated and it becomes difficult to manage the wastewater treatment capacity of the slope. There was room for.

  Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a rainwater drainage system capable of improving drainage treatment capacity by efficiently bypassing the entire slope surface with a simple structure. It is said.

  In order to achieve the above object, a rainwater drainage system according to the present invention is a rainwater drainage system that drains road drainage or slope drainage at the top of a slope into a gutter on the bottom edge of a drainage facility. A drainage facility provided with at least one of a water collecting mass, a horizontal drainage groove, and a vertical drainage groove, a tubular drainage pipe for draining from the drainage equipment to the side groove on the glue butt side, and the drainage pipe And a water guide part for guiding the drainage of the drainage facility to the drainage pipe.

In the rainwater drainage system according to the present invention, the road surface drainage or the slope drainage at the upper part of the slope surface is led from the drainage facility by the water guide section, and the drainage is passed through the drain pipe, Can drain directly into the gutter. Thus, in this invention, the whole slope can be bypassed efficiently with the simple structure of providing a water conveyance part in the location which introduces water, and waste water treatment capacity can be improved.
In the present invention, since the drainage pipe is tubular, the drainage pipe can be installed in various directions such as a direction not along the vertical drainage groove in the slope surface and at a long distance. Therefore, it is not limited to the installation location of the water collecting mass, can be bypassed as a whole slope surface, it becomes possible to prevent jumping and flooding, and the factors causing soil collapse can be reduced to a small extent.

Moreover, in the rainwater drainage system according to the present invention, the drainage pipeline is provided in the existing drainage equipment via the water conduit, and the connection is more than that in the case where the tubular drainage is directly attached to the existing drainage equipment. Simple.
Furthermore, in the present invention, since the length of the water conveyance section can be shortened, it is easy to conduct water by setting the cross-sectional area of the drainage to the middle of the cross-sectional area of the drainage facility and the cross-sectional area of the drainage pipe. .

  Moreover, it is preferable that the rainwater drainage system which concerns on this invention is provided with the siphon induction part in at least one of the said water conveyance part and the said drainage pipe line.

By setting it as such a structure, the drainage of a road surface or a slope surface can be efficiently drained by the siphon effect | action to the side groove | channel on the glue buttocks side using the water guide part and drainage pipe line which connected the siphon induction part. In other words, in the present invention, as the siphon inducing portion, for example, a protrusion is provided on the inner surface of the drain pipe, the inner surface is reduced in diameter, or a lid member is disposed above the opening hole of the water guiding portion with a predetermined interval. Can cause a siphon phenomenon to occur, and by generating a siphon phenomenon in such a siphon-type drainage pipe, it is possible to achieve a higher flow rate than when draining by naturally flowing down the pipe, increasing the wastewater treatment capacity. Can be drained efficiently. Thereby, even if it is a case of heavy rain, rainwater does not overflow from a water collection mass, and it can suppress effectively that rainwater penetrate | invades into a slope surface.
Furthermore, in the present invention, by generating a siphon phenomenon, there is also an advantage that the wastewater treatment amount can be obtained even if the drainage has a high flow velocity and the diameter of the drainage pipe is reduced.

  In the rainwater drainage system according to the present invention, it is preferable that the bottom portion on the upstream end side of the water guide portion is disposed with a vertical gap between the bottom portion of the drainage facility.

  In this case, the amount of inflow into the water guide section can be adjusted by changing the gap amount between the bottom section on the upstream end side of the water guide section and the bottom section of the drainage facility.

  The rainwater drainage system according to the present invention may be characterized in that at least a part of the drainage pipe is buried in the ground.

In the rainwater drainage system according to the present invention, since the portion of the drainage pipe disposed on the ground can be reduced, the support structure for supporting the drainage pipe on the ground and the support structure such as the foundation for fixing the support tool. Can be simplified or omitted.
Furthermore, in the present invention, the drainage pipe in the portion buried in the ground can be protected from ultraviolet rays, and the durability of the drainage pipe can be improved.

  In the rainwater drainage system according to the present invention, it is preferable that the drainage pipe is made of resin having light resistance.

  In the rainwater drainage system according to the present invention, the drainage pipe can be used outdoors for a long time, and the drainage pipe can be installed on the ground surface. Therefore, the excavation work on the slope can be reduced compared with the case where it is buried in the ground, and the construction can be easily performed.

  According to the rainwater drainage system of the present invention, the wastewater treatment capacity can be improved by efficiently bypassing the entire slope surface with a simple structure.

It is the perspective view which showed typically the rainwater drainage system by the 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the principal part of the rainwater drainage system shown in FIG. It is a figure which shows the attachment structure of a water guide groove, Comprising: (a) is an expansion perspective view, (b) is a longitudinal cross-sectional view. It is a figure which shows the structure of the siphon induction part provided in a water conduit, Comprising: (a) is the figure seen from upper direction, (b) is a side view, (c) is the figure seen from the downstream. It is a figure which shows the structure of another siphon induction part, Comprising: (a) is the figure seen from upper direction, (b) is a side view, (c) is the figure seen from the downstream. It is a figure which shows the structure of another siphon induction part, Comprising: (a) is the figure seen from upper direction, (b) is a side view, (c) is the figure seen from the downstream. It is the perspective view which showed typically the rainwater drainage system by the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the principal part of the rainwater drainage system shown in FIG. It is the perspective view which showed typically the rainwater drainage system by the 3rd Embodiment of this invention. It is the perspective view which showed typically the rainwater drainage system by the 4th Embodiment of this invention. It is the perspective view which showed typically the rainwater drainage system by the 5th Embodiment of this invention. It is the perspective view which showed typically the rainwater drainage system by the 6th Embodiment of this invention. It is the perspective view which showed typically the rainwater drainage system by the 7th Embodiment of this invention. It is the perspective view which showed typically the rainwater drainage system by the 8th Embodiment of this invention. It is the perspective view which showed typically the rainwater drainage system by the 9th Embodiment of this invention. It is a longitudinal cross-sectional view of the reduced diameter tube shown in FIG. It is a figure which shows the test body of the comparative example by 1st Example, Comprising: (a), (b) is a side view, (c) is a figure which shows the suction state of an opening hole. It is a figure which shows the test body of Example 1, 2 by 1st Example, Comprising: (a) is the figure seen from the upstream, (b) is a side view, (c) is a figure which shows the suction state of an opening hole It is. It is a figure which shows the test body of Example 3 by 2nd Example, Comprising: (a) is the figure seen from the upstream, (b) is a side view, (c) is a figure which shows the suction state of an opening hole. .

  Hereinafter, a rainwater drainage system according to an embodiment of the present invention will be described in detail with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the rainwater drainage system 1 by 1st Embodiment is installed in the slope 2 formed when banking and providing a road upward. Here, in this Embodiment, it applies when providing the rainwater drainage system 1 with respect to the existing slope 2 provided with the drainage facility.
In the present embodiment, the slope surface 2 is divided into a plurality of steps in the height direction (three steps in FIG. 1), and a step portion B between the slope surfaces 2 of each step extends in a substantially horizontal direction. Is formed. Further, a road surface C is provided at the uppermost portion of the glue surface 2, and a side road D is provided at the glue butt.

  The existing drainage facilities on the slope surface 2 include a horizontal drainage groove 21 made of a concrete U-shaped groove and provided along the extending direction of the small step portion B, and the horizontal drainage grooves 21 arranged along the vertical direction of the slope surface 2. A vertical drainage groove 25 made of a concrete U-shaped groove connected to the drainage drainage groove 22 and a water collecting mass 24 are connected to the drainage groove 21. The rainwater flowing into the small step portion B is received by the horizontal drainage groove 21 and flows toward one side (the right side in FIG. 1) and is discharged.

  The side road D is provided with a glue butt drainage groove 22 (a side groove on the glue butt side) made of a concrete U-shaped groove as a drainage facility along the glue butt. The shoulder portion of the side road D is inclined downward toward the glue butt drainage groove 22 so that rainwater flows into the glue butt drainage groove 22. In the existing drainage facility on the side road D, rainwater flowing in from the side road D and the slope surface 2 located at the lowermost part is received by the glue bottom drainage groove 22 and flows toward one side (right side in FIG. 1). Discharged.

  On the road surface C located at the uppermost part, a water collecting mass 23 is provided on the road shoulder portion with the slope 2. The shoulder portion of the road surface C is inclined downward toward the water collecting mass 23 so that rainwater flows into the water collecting mass 23.

  The water collecting mass 23 is provided with a filter (not shown) for removing unnecessary materials mixed in the flowing rainwater. This filter is made of a water-permeable member such as a bar screen, and is configured to separate solid matter such as fallen leaves, and is provided on the upstream side of the water collection mass 23 on the road surface C.

The bottom surface of the water collecting mass 24 provided in the small step portion B is set lower than the position of the bottom surface of the horizontal drainage groove 21. Further, the water collecting mass 24 communicates with the inside of the horizontal drainage groove 21 and the inside of the vertical drainage groove 25.
The downstream side drainage groove 21 provided on the opposite side of the upstream side drainage groove 21 with the rainwater flowing into the catchment mass 24 provided in the small step portion B across the water collection mass 24 is The slope is descending in a direction away from 24, and rainwater does not flow into the water collecting mass 24. A weir (not shown) for increasing the water level in the water collecting mass 24 is provided on the inner surface of the downstream horizontal drainage groove 21 at a position near the water collecting mass 24.

  The rainwater drainage system 1 is configured to drain the drainage of the road surface C into the glue bottom drainage groove 22 using a drainage pipe line 10 extending in the vertical direction. In the drainage pipe 10, a junction pipe 11 is arranged at a junction of drainage that joins the glue butt drainage groove 22.

  The drainage pipe 10 is made of a light-resistant resin pipe, the upper end 10a is connected to the water collecting mass 23 of the road surface C via the water guide groove 30 (water guide part), and the lower end 10b is connected to the joining pipe 11. Yes. The drainage pipe 10 is disposed on the ground portion so as to be along the slope surface 2 and the surface of the small step portion B. In the present embodiment, the position of the lower end 10b of the drain pipe 10 is the lowest position where the pipe axis direction C1 of the drain pipe 10 changes when viewed from above. As shown in FIGS. 2 and 3, the upper end 10 a of the drain pipe 10 extends upward and is connected to the bottom surface 31 a of the water guide groove 30.

As the light-resistant drainage pipe 10, for example, a light-resistant PVC pipe, a PE resin pipe blended with a black pigment, or a resin pipe having an outer layer coated with a light-resistant resin can be used.
Further, as a resin pipe having an outer layer coated with a light resistant resin on the drain pipe 10, for example, a PVC pipe coated with AES, a PVC pipe coated with a light resistant PVC, a PVC pipe coated with a light resistant paint, or a black pigment Examples thereof include a PE pipe coated with a blended PE resin, a reinforced plastic pipe coated with a light-resistant paint, and the like.

  Thus, as shown in FIG. 1, the rainwater drainage system 1 of the present embodiment allows a part of the rainwater flowing into the water collecting mass 23 to flow in the drainage pipe 10 and drain into the glue butt drainage groove 22. The drainage system is drained by a separate system from the rainwater drainage system in the lateral drainage groove 21 provided in the small step portion B.

  Further, even in the case of heavy rain, the collecting mass 23 into which rainwater on the road surface C flows is not overflowed, and rainwater on the road surface C can be prevented from flowing down along the slope surface 2. Therefore, the lateral drainage groove 21 of the small step portion B can treat only the slope 2 immediately above and the rainwater of the small step portion B, and the drainage is unlikely to overflow in the water collecting mass 24 provided in the small step portion B.

A part of the drainage in the catchment mass 23 on the road surface C flows into the catchment mass 24 located in each small step portion B through the vertical drainage groove 25 and the horizontal drainage groove provided in the uppermost small step portion B. The wastewater in 21 flows in and is further drained by the vertical drainage groove 25 to the lower water collecting mass 24 or the glue bottom drainage groove 22.
Further, most of the rainwater flowing into the water collecting mass 24 located in the uppermost small step portion B is drained to the glue butt drainage groove 22 by the drainage pipe 10. Therefore, the amount of drainage in the vertical drainage groove 25 is greatly reduced. That is, the amount of drainage that joins the water collection mass 24 from the vertical drainage groove 25 is reduced, and the water collection mass 24 is less likely to overflow.

  As shown in FIGS. 3A and 3B, the water guide groove 30 has a groove shape extending in one direction, and its longitudinal direction projects outward in a substantially horizontal direction from the opening on the slope surface side of the water collecting mass 23. It is provided in the state. Here, in the direction in which the water guide groove 30 projects, the projecting end side (the side away from the water collecting mass 23) is the downstream side, and the base end side of the water conducting side (the water collecting mass 23 side) is the upstream side.

The bottom portion on the upstream end 30 a side of the water guide groove 30 is disposed with a gap S in the vertical direction between the bottom portion 23 a of the water collecting mass 23.
That is, when the shape of the bottom portion on the upstream end 30a side of the water guide groove 30 is the same shape as the shape of the bottom portion of the water collecting mass 23, if the gap S is zero (no gap), the amount of dripping is 100%. Moreover, by setting the clearance S, it is possible to make a setting in which the amount of penetration of the water guide groove 30 is reduced.

  The water guide groove 30 includes a bottom plate 31, side plates 32 and 32 extending upward from both ends of the bottom plate 31 when viewed from the longitudinal direction, and an end plate 33 that closes the bottom plate 31 and the downstream end of the side plate 32. Yes. An opening hole 34 is formed in the vicinity of the end plate 33 side of the bottom plate 31, and the upper end 10 a of the drain pipe 10 is connected to the opening hole 34. As the water guide groove 30, similarly to the drain pipe 10, for example, a light-resistant PVC pipe, a PE resin pipe blended with a black pigment, or a resin pipe with a light-resistant resin coated on the outer layer can be used.

  The water guide groove 30 is provided with a siphon inducing portion, and rainwater flowing on the road surface C efficiently passes through the drainage pipe by the siphon action of the siphon inducing portion of the water guide groove 30 through the collecting mass 23. It is drained into the drain groove 22. As a siphon induction part, what is shown, for example in FIGS. 4-6 is employable.

  4 to 6 are plate-like lid members 12A, 12B, 12C, and 12D that are provided so as to block the upper portion of the opening hole 34 of the bottom plate 31. As shown in FIG. The waste water flowing into the water guide groove 30 flows between the bottom plate 31 and the cover members 12A, 12B, 12C, and 12D, and flows from the opening hole 34 to the drain pipe 10.

  The lid member 12A shown in FIGS. 4A to 4C has a quadrangular shape in plan view, and is arranged in parallel to the bottom surface 31a and at a predetermined interval upward from the bottom surface 31a. The lid member 12A has both side ends 12c, 12c fixed to the side plate 32 by an adhesive means or the like. The rear end 12b of the lid member 12A is provided so as to be located behind the opening hole 34 in a top view.

The flat lid member 12B shown in FIGS. 5A to 5C has a quadrangular shape in a plan view, and is disposed so as to be gradually inclined downward toward the front from the rear end 12b. Both side ends 12c, 12c of the lid member 12B are fixed to the side plate 32 by an adhesive means or the like. The rear end 12b of the lid member 12B is provided so as to be located behind the opening hole 34 in a top view.
The lid member 12B disposed obliquely has a function as a wall on the downstream side and a function of a lid for generating a siphon action. And as conditions for setting the angle at which siphoning is likely to occur, for example, the drainage pipe diameter (the pipe diameter of the drainage pipe 10), the width D of the water guide groove 30, the distance from the opening hole 34 to the end plate 33 in top view, the amount of drainage The drainage flow rate can be selected, for example, an angle of 45 degrees can be set.

Here, the front ends 12 a of the lid members 12 </ b> A and 12 </ b> B described above may be arranged at a position with a gap with respect to the end plate 33.
In addition, since the lid members 12A and 12B only need to have a lid function with a water flow, it is also possible to employ a member in which a mesh or a slit is formed.

The siphon induction part 12 shown in FIG. 6 is lid members 12 </ b> C and 12 </ b> D provided so as to close the upper part of the opening hole 34 of the bottom plate 31. The waste water flowing into the water guide groove 30 flows between the bottom plate 31 and the lid members 12C and 12D, and flows from the opening hole 34 to the drain pipe 10.
The lid member 12C shown in FIGS. 6A to 6C is formed in a disc shape, and is arranged in parallel to the bottom surface 31a and at a predetermined interval upward from the bottom surface 31a. The lid member 12 </ b> C has a larger diameter than the opening hole 34 and is provided substantially coaxially with the opening hole 34, and is supported from below by a plurality of (four in this case) column members 121 extending upward from the opening edge of the opening hole 34. ing. That is, the opening hole 34 is covered with the lid member 12C in a top view.

As shown in FIG. 1, the merging pipeline 11 is arranged so that one end is connected to the lower end 10 b of the drainage pipeline 10 and the drainage end of the other end is located in the glue butt drainage groove 22. The tube axis direction of the merging conduit 11 is the same as the flow direction of the glue tail drain groove 22.
Note that the merging pipeline 11 may be provided separately or integrally with the drainage pipeline 10.

Next, the effect | action of the rainwater drainage system 1 mentioned above is demonstrated in detail using drawing.
In the rainwater drainage system 1 according to the present embodiment, as shown in FIG. 1, the road drainage at the top of the slope surface 2 is led from the water collecting mass 23 through the water guide groove 30, and the drainage is passed through the drainage pipe 10. Thus, the water can be drained directly from the water guide groove 30 to the glue bottom drain groove 22.
Thus, in this Embodiment, the whole slope can be bypassed efficiently by the simple structure of providing the water guide groove | channel 30 in the location which introduces water, and wastewater treatment capacity can be improved.

  In this embodiment, since the drainage pipe 10 is tubular, the drainage pipe 10 is installed in various directions such as a direction not along the vertical drainage groove 25 in the slope surface 2 and at a long distance. be able to. Therefore, it is not restricted to the installation location of the water collecting mass 23, can be bypassed as the entire slope surface 2, it becomes possible to prevent jumping and flooding, and the factor causing the soil collapse can be reduced to a small extent.

Moreover, in the rainwater drainage system by this Embodiment, it is the structure by which the drainage pipe line 10 is provided through the ditch | groove 30 in the existing drainage facility (here water collection mass 23), and tubular drainage is provided in the existing drainage facility. The connection is simple compared to the case of attaching the part directly.
Furthermore, in the present embodiment, the water discharge cross-sectional area of the water guide groove 30 is set to an intermediate position between the cross-sectional area of the water collecting mass 23 and the cross-sectional area of the drain pipe 10 to facilitate water introduction.

Moreover, in this Embodiment, the drainage of a road surface or a slope surface can be efficiently drained by the sift action to the side groove | channel on a glue buttocks side using the water guide groove 30 and the drainage pipe line 10 which connected the siphon induction part. In other words, in the present embodiment, as the siphon inducing portion, for example, the siphon inducing portion 12 of the above-described water guiding groove 30 or the inner surface of the drain pipe 10 is provided with a protrusion, the inner surface is reduced in diameter, or the water guiding portion 30 is opened. What causes a siphon phenomenon by arranging a lid member at a predetermined interval above the hole 34 can be adopted, and by generating the siphon phenomenon in such a siphon-type drain pipe 10, The flow rate can be made higher than that when draining and draining, and drainage can be efficiently drained by increasing the wastewater treatment capacity. Thereby, even if it is a case of heavy rain, rainwater does not overflow from a water collection mass, and it can suppress effectively that rainwater penetrate | infiltrates into the slope surface 2. FIG.
Furthermore, in the present embodiment, by generating a siphon phenomenon, there is also an advantage that the waste water treatment amount can be obtained even if the drainage water is increased in flow rate and the diameter of the drain pipe 10 is reduced.

  Further, in the rainwater drainage system 1 of the present embodiment, the amount of inflow into the water guide groove 30 is changed by changing the gap amount between the bottom portion on the upstream end 30 a side of the water guide groove 30 and the bottom portion 23 a of the water collecting mass 23. Can be adjusted.

  Moreover, in this Embodiment, since the drainage pipe 10 is comprised with resin which has light resistance, it becomes possible to use the drainage pipe 10 outdoors for a long term, and the drainage pipe 10 is made into the ground surface. Can be installed. Therefore, excavation work on the slope surface 2 can be reduced as compared with the case where it is buried in the ground, and construction can be easily performed.

  Moreover, the rainwater drainage system 1 of this Embodiment is simple structure, and can improve wastewater treatment capacity by bypassing the whole slope 2 efficiently.

(Second Embodiment)
Next, as shown in FIGS. 7 and 8, a rainwater drainage system 1A according to a second embodiment of the present invention will be described with reference to the drawings.
The rainwater drainage system 1 </ b> A according to the second embodiment has a configuration in which the water guide groove 30 is provided in the vertical drainage groove 25. Since the water guide groove 30 has the same configuration as that of the first embodiment described above, detailed description thereof is omitted here.
The upstream end 30 a of the water guide groove 30 is disposed in the concave groove of the uppermost vertical drainage groove 25. A gap S is provided between the bottom plate 31 of the water guide groove 30 and the bottom surface 25 a of the vertical drainage groove 25. That is, the position of the water guiding groove 30 is in the vicinity of the water collecting mass 23 on the road surface C, and is arranged so that a part of the drainage flows into the water guiding groove 30 immediately after flowing out from the water collecting mass 23 into the vertical draining groove 25. Has been.

(Third embodiment)
Next, as shown in FIG. 9, a rainwater drainage system 1B according to a third embodiment of the present invention will be described with reference to the drawings.
The rainwater drainage system 1B according to the third embodiment has a structure in which the water guide groove 30 is provided in the horizontal drainage groove 21 of the uppermost (first) sub-stage B. That is, the rainwater drainage system 1B is configured to drain part of the drainage flowing into the lateral drainage groove 21 into the glue butt drainage groove 22 using the drainage pipe 10 extending in the vertical direction. In the drainage pipe 10, a merging pipe 11 is disposed at the junction of drainage that joins the glue butt drainage groove 22 as in the first embodiment described above.
In the present embodiment, the rainwater drainage system 1 </ b> B having the drainage pipe 10 and the vertical drainage groove 25, which will be described later, which is a separate system from the drainage pipe 10, are drained into the glue bottom drainage groove 22. It has become.

(Fourth embodiment)
Next, as shown in FIG. 10, the rainwater drainage system 1C according to the fourth embodiment of the present invention leaves the existing drainage function by the existing vertical drainage groove 25 and the horizontal drainage groove 21 as it is. A water collection mass 23A is newly provided on the road surface C at a substantially intermediate portion between the water masses 23, 23, and a water guide groove 30 is provided for the newly established water collection mass 23A. The rainwater drainage system 1C of the present embodiment is the same as the rainwater drainage system 1 of the first embodiment shown in FIG. 1 described above.

(Fifth embodiment)
Next, as shown in FIGS. 11 and 12, a rainwater drainage system 1D according to a fifth embodiment of the present invention will be described with reference to the drawings.
The rainwater drainage system 1D, 1E according to the fifth embodiment has a configuration in which a water guide groove 30 is provided for a vertical drainage groove 25 disposed only from the water collecting mass 23 of the road surface C to the uppermost small step portion B. It has become. Here, in the rainwater drainage systems 1D and 1E of the present embodiment, road surface drainage flows in the water collecting mass 24 of the uppermost small step portion B, but there is no vertical drainage groove 25 that can drain, and the drainage to the horizontal drainage groove 21 is achieved. Since it becomes drainage, what has a bad flow and is likely to cause water loss in the water collecting mass 24 is applied.

In the rainwater drainage system 1 </ b> D shown in FIG. 11, the drainage pipe 10 is extended to the glue bottom drainage groove 22.
The rainwater drainage system 1E shown in FIG. 12 is an example in the case where the drainage drainage channel 22 cannot be drained directly, and the drainage pipe 10 is extended from the top to the horizontal drainage channel 21 of the second small step portion B. Yes.
The basic configuration of the rainwater drainage systems 1D and 1E of the present embodiment is the same as that of the rainwater drainage system 1A of the second embodiment shown in FIGS. 7 and 8 described above.

Since the rainwater drainage systems 1D and 1E are pipes, the rainwater drainage systems 1D and 1E can be merged in accordance with the flow direction of the glue bottom drainage groove 22, and the number of merge points is increased.
In the rainwater drainage system 1E shown in FIG. 12, the drainage pipe 10 is not extended to the glue bottom drainage groove 22, but the risk of water loss in the water collecting mass 24 as described above can be reduced.

(Sixth embodiment)
Next, as shown in FIG. 13, a rainwater drainage system 1F according to a sixth embodiment of the present invention will be described with reference to the drawings.
The rainwater drainage system 1F according to the sixth embodiment has a configuration in which the water guide groove 30 is applied when a recessed portion 21c is generated in the middle of the extending direction of the horizontal drainage groove 21 of the uppermost small step portion B. At the time of newly installing the slope surface, there was no hollow portion 21c, and it flowed from the upstream water collection mass 24 (upstream portion 21a) of the lateral drainage groove 21 toward the downstream portion 21b where the downstream water collection mass 24 is located. This is an example in which a recess 21c is generated in the middle of the horizontal drainage groove 21 with time.

  That is, the horizontal drainage groove 21 is inclined downward (in the direction of arrow E1) from the upstream portion 21a where the water collecting mass 24 is located toward the hollow portion 21c, and is opposite to the water collecting mass 24 across the hollow portion 21c. The downstream portion 21b is also inclined downward (in the direction of arrow E2) toward the hollow portion 21c. In this small step portion B, a groove-shaped concave groove portion 2a that communicates with the lateral drainage groove 21 having the hollow portion 21c and opens on the side of the slope surface 2 positioned below the small step portion B is cut out. It is provided in a state where the water guide groove 30 is fitted in the concave groove portion 2a. In the rainwater drainage system 1 </ b> F, the drainage that has flowed into the water guide groove 30 passes through the drainage pipe 10 and is drained into the glue bottom drainage groove 22.

(Seventh embodiment)
Next, as shown in FIG. 14, a rainwater drainage system 1G according to a seventh embodiment of the present invention will be described with reference to the drawings.
As described above, the rainwater drainage system 1G according to the seventh embodiment has a water guide groove in the water collecting groove 23 of the road surface C on the slope surface 2 where the small step portion B, the horizontal drainage groove 21 and the vertical drainage groove 25 are not provided. 30 is provided, and the drainage pipe 10 is directly arranged up to the glue bottom drainage groove 22.
The drainage pipe 10 extends downward from the water guide groove 30 and enters the ground, and an embedded part (reference numeral 10 </ b> A) is embedded along the slope 2. The buried drainage pipe 10 </ b> A is connected to the joining pipe 11 that protrudes from the inner wall of the glue bottom drainage groove 22 into the side groove.

In this Embodiment, since the part arrange | positioned on the ground among the drainage pipes 10 can be decreased, support structures, such as a support which supports the drainage pipes 10 on the ground, and a foundation which fixes this support tool, are provided. It can be simplified or omitted.
Furthermore, in this case, it is possible to protect the drainage pipe line 10A embedded in the ground from ultraviolet rays and improve the durability of the drainage pipe line 10.

(Eighth embodiment)
Next, as shown in FIGS. 15 and 16, a rainwater drainage system 1H according to an eighth embodiment of the present invention will be described with reference to the drawings.
The rainwater drainage system 1H according to the eighth embodiment has a configuration in which the reduced diameter pipe 12E (12) (siphon inducing portion) is provided in the drainage pipe line 10 in the first embodiment described above. The reduced-diameter pipe 12E is a pipe having an inner diameter smaller than the inner diameter of the drainage pipe 10 at a part of an appropriate position of the drainage pipe 10, and in this embodiment, an inclined portion 10B along the slope of the slope 2 It is arrange | positioned in the approximate center part of the length direction. The reduced diameter tube 12E is configured to generate a siphon phenomenon by the effect of reducing the inner diameter.

In the siphon-type drainage pipe 10 having such a reduced diameter pipe 12E, by generating a siphon phenomenon in the pipe, the flow rate can be made higher than that when the pipe is naturally flowed down and drained, and the drainage treatment capacity is improved. It can be increased and drained efficiently into the glue bottom drainage groove 22.
Note that, instead of the reduced diameter tube 12E, a siphon inducing portion having an effect such as a reduced diameter by a projection or a ring-shaped plate that narrows the inner diameter may be provided. Even in such a configuration, the same as the reduced diameter tube 12E may be provided. Siphon action can be produced. And it becomes easy to generate | occur | produce continuously, without using the reduced diameter pipe | tube 12E in several places, without a siphon phenomenon interrupting.

  Next, examples carried out to support the effects of the rainwater drainage system according to the above-described embodiment will be described below.

(First embodiment)
As shown in FIGS. 17 and 18, this first example uses test bodies 4A and 4B simulating the water guide groove 30 (water guide part) of the above-described embodiment, the presence or absence of the water guide part, The effect of the wall (end plate) on drainage was confirmed from the drainage situation from the opening hole 41.

  FIGS. 17A to 17C show a first test body 4A according to a comparative example that does not include a water guiding portion. That is, the comparative example corresponds to a configuration in which the drain pipe is directly connected to the water collecting mass in the above-described embodiment. In the first test body 4A, a 75A (inner diameter of about 8 cm) drain pipe 42 is connected to the center of the bottom surface 40a of the square water tank 40 in which the vertical and horizontal dimensions (vertical dimension D1, horizontal dimension D2) are set to 60 cm in plan view. The configuration was as follows.

  18 (a) to 18 (c) show a second test body 4B according to the first embodiment and the second embodiment having a water guiding portion. The second test body 4B uses a kite that simulates the water guide portion 44, and has a groove width D of 40 cm in the first embodiment and a groove width D of 20 cm in the second embodiment. . In each of the embodiments, the center axis of the opening hole 41 is aligned with a position of 12 cm at a distance (wall distance L) from the end plate 43 on the bottom plate to the rear (left side of the drawing in FIG. 18B). In addition, a drain pipe 42 made of a 75A (inner diameter of about 8 cm) PVC pipe is connected in two patterns: a wall distance L and a position where the center axis of the opening hole 41 is aligned at a position of 8 cm.

  In the test, in each of the first test body 4A and the second test body 4B, about 15 liters / second of water is supplied from the opening side (rear side), and the maximum water level at the position before the opening hole 41 is measured. At the same time, the state of inhalation of water was confirmed visually. Table 1 shows the test results.

As shown in Table 1 and FIG. 17 (c), in the case of the comparative example that does not have the water guiding portion, the vortex U is generated in the vicinity of the opening hole 41 and the water level H1 is 14 to 22 cm, which will be described later. The water level was higher than that of H2 (see FIG. 18C).
As shown in Table 1 and FIG. 18 (c), in the case of Example 1 having the water guide portion 44, when the wall distance L is 12 cm, the water level H2 in the vicinity of the opening hole 41 is slightly higher as 12 to 22 cm, The vortex U was formed and the water surface was in a state of violence (hereinafter referred to as water surface violence). Moreover, in Example 1, when the wall distance L is 8 cm, the water level H2 near the opening hole 41 is 9 to 13 cm, and the water level is lower than in the case where the wall distance L is 12 cm, and the vortex U is not generated. The water rampage was in great condition.

  In the case of Example 2 having the water guide portion 44, when the wall distance L is 12 cm, the water level H2 near the opening hole 41 is 8 to 13 cm, and the water level is lower than that in the case of the wall distance L of Example 1 being 12 cm. It was low and no vortex was generated, but the water surface was in a large state. Further, when the wall distance L is 8 cm in Example 2, the water level H2 in the vicinity of the opening hole 41 is 7 to 9 cm, and the water level is lower than that in Example 1 when the wall distance L is 8 cm. Was also confirmed to be small.

  From the test results, it was confirmed that the water levels of Examples 1 and 2 having the water guide portion 44 were lower than those of the comparative example having no water guide portion. In addition, the water level was lower in Example 1 where the groove width D was 40 cm than in Example 2 where the groove width D was 20 cm. Further, when the wall distance L was 8 cm, the water surface fluctuation in the vicinity of the opening hole 41 was smaller than that of 12 cm, and the water flow state into the opening hole 41 became stable and good.

Therefore, it is considered that the siphon phenomenon occurs in the state where the vortex is not generated in the case where the water guide portion 44 is provided (Examples 1 and 2). Furthermore, in the case where the groove width D of Example 2 is 20 cm, the water level is lower than in the case of Example 1 where the groove width D is 40 cm, and the water surface turbulence is reduced. I can say that.
In the first and second embodiments having the water guide portion 44, in the case where the wall distance is 8 cm, the distance between the inner wall of the drain pipe 42 and the end plate 43 of the water guide section 44 is short, and the drainage easily flows into the drain pipe 42. The rampage moderately creates a water-sealed state and is a siphon phenomenon.

Furthermore, it is conceivable that the drainage pipe 42 can be drained more smoothly by reducing the groove width D of the water guide portion 44, but the maximum flow rate of the water guide portion 44 itself is reduced. Therefore, the flow rate calculation (Manning formula, etc.) may be obtained. In some cases, the groove width D is also necessary in terms of the structure and operation of the connecting portion between the water guide portion 44 and the drain pipe 42.
From the above, the groove width D of the connection portion of the water guide portion 44 with the drain pipe 42 (opening hole 41) is preferably 1 to 5 times the diameter of the drain pipe 42, and is approximately 2.5 times. Is preferred. Moreover, when the inner diameter of the drain pipe 42 is 80 mm, the groove width D of the water guide portion 44 is preferably 20 to 40 cm.

(Second embodiment)
In the second embodiment, as shown in FIGS. 19A to 19C, in the test body 4B having the wall distance L of 8 cm in the above-described second embodiment of the first embodiment, the connection portion with the bottom plate of the drain pipe 42. The same test as in the first example (Example 3) was performed by changing the curvature R of the curve part 45 using the one having the curve part 45 formed thereon. The test was performed in three cases where the curvature R of the curved portion 45 is 0 mm (right angle) R0, 5 mm R5, and 15 mm R15. Table 2 shows the test results of Example 3.

  According to the test result of Example 3, in the case of R5 and R15 in which the curved portion 45 (curvature R) is formed in the drain pipe 42, the water level H2 near the opening hole 41 is smaller than R0 without the curved portion 45, and It was confirmed that the water rampage was small. This is presumably because the water in the water guiding portion 44 is smoothly guided to the drain pipe 42 and the siphon phenomenon is stable.

As mentioned above, although embodiment of the rainwater drainage system by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the rainwater drainage system 1, 1 </ b> A to 1 </ b> G according to the present embodiment, a siphon inducing portion is provided in the water guide groove 30 (water guide portion) or the drain pipe 10, but a siphon inducing portion is provided. There is no particular limitation, and the siphon induction part can be omitted.

  Moreover, in this Embodiment, although the water guide groove | channel 30 which consists of the bottom plate 31, the side plate 32, and the end plate 33 is employ | adopted as a water guide part, it is not limited to such a structure, The amount of drainage is If it can be obtained, it is possible to employ a water guide portion made of a tubular member. Furthermore, the configuration such as the position and shape of the opening hole of the water guide portion is not limited to the above-described embodiment.

  Furthermore, in this Embodiment, although the drain pipe 10 is made into what is formed with resin which has light resistance, it is not limited to such light resistance resin.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1, 1A-1H Rainwater drainage system 2 Slope 10, 10A Drain pipe 11 Merge pipe 12, 12A, 12B, 12C Siphon induction part 21 Side drain ditch 22 Nori bottom drain ditch (side gutter side gutter)
23, 24 Water collection mass 25 Vertical drainage groove 30 Water conveyance groove (water conveyance part)
31 Bottom plate 32 Side plate 33 End plate 34 Open hole B Small step C Road surface D Side road S Gap

Claims (5)

A drainage drainage system that drains road drainage or slope drainage at the top of a slope into a gutter on the bottom side of the glue bottom, which is a discharge facility,
A drainage facility provided with at least one of a water collecting mass, a horizontal drainage channel, and a vertical drainage channel;
A tubular drainage pipe for draining from the drainage facility to the gutter on the glue butt side;
A water guide section connected to the drain pipe for guiding the drainage of the drainage facility to the drain pipe;
A rainwater drainage system characterized by comprising:   The rainwater drainage system according to claim 1, wherein a siphon inducing portion is provided in at least one of the water guiding portion and the drainage pipe.   The rainwater drainage system according to claim 1 or 2, wherein a bottom portion on the upstream end side of the water guide portion is disposed with a vertical gap between the bottom portion and the bottom portion of the drainage facility.   The rainwater drainage system according to any one of claims 1 to 3, wherein at least a part of the drainage pipe is buried in the ground.   The rainwater drainage system according to any one of claims 1 to 4, wherein the drainage pipe is made of light-resistant resin.

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