JP2011202475A - Facility for suppressing outflow of rainwater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disclose facilities for suppressing outflow of rainwater, which enable storage and infiltration tanks, arranged along roads, to be easily connected together in a mutually water-passable state in the acute-angled crossing section of the roads, in the facilities A for suppressing the outflow of the rainwater, having the storage and infiltration tanks 1, ... arranged along the two roads R1 and R2 crossing each other at an acute angle.SOLUTION: In the construction of the facilities A for suppressing the outflow of the rainwater, the storage and infiltration tanks 1, ... (first and second storage and infiltration tank groups 1A and 1B), into which the rainwater flows, are arranged in the ground along the two roads R1 and R2 crossing each other at the acute angle α. A vertical hole structure 10 equipped with a water passing hole is arranged in the crossing section of the roads; and both the storage and infiltration tanks 1a and 1a, which are positioned in close vicinity to the crossing section, are connected to each other via the vertical hole structure 10 equipped with the water passing hole.

Description

  The present invention relates to a rainwater outflow suppression facility that allows rainwater flowing in a road side ditch to flow into a storage and penetration tank disposed in the ground so that rainwater can be prevented from flowing out from the road side ditch to a road or the like.

  A part of rainwater flowing through the road side ditch can be temporarily introduced directly from the road side ditch or through the inflow trough into the storage and penetration tank buried in the ground. Rainwater outflow control facilities that can prevent rainwater from flowing into the road are known. A rainwater outflow control facility in which a plurality of storage permeation tanks are arranged along a road is also known. Patent Document 1 discloses a plurality of storage permeation tanks even when the road is gently curved. A rainwater outflow control facility is described in which the laying direction of one storage permeation tank and the other storage permeation tank adjacent thereto are connected by a straight pipe provided with a universal joint pipe so that they can be arranged along the bend of Has been.

  Moreover, as a storage permeation tank installed in the ground, it is also known that water storage space forming members made of a resin material are stacked in multiple stages, and the perimeter is covered with a water-permeable sheet to form a permeation tank (for example, Patent Document 2, 3 etc.).

  In a conventionally known rainwater outflow control facility, in order to prevent sand and garbage flowing along with rainwater from depositing as precipitates in the entire interior of the storage infiltration tank, a rainwater inlet is provided at the bottom of the storage infiltration tank, In the storage and permeation tank, it is usual to store the supernatant water after dropping the sediment to the lower part. And sand etc. deposited and deposited in the lower part of the storage and permeation tank are periodically removed using high-pressure water or vacuum. Even when a plurality of storage and penetration tanks are buried in the ground along the road, as described in Patent Document 1, it is common to connect the lower parts of the storage and penetration tanks with pipe members or the like.

  In such a storage permeation tank, when rainwater enters the tank from the bottom, it is necessary to discharge a corresponding amount of air outside the tank so that an air pool does not occur at the top of the tank, For this purpose, vents are also installed from the upper part of the tank to the ground surface.

JP 2009-52304 A JP 2008-8075 A JP 2009-24447 A

  When the number of installations of rainwater outflow control facilities as described above increases, in urban areas, etc., storage penetration tanks are installed along both intersecting roads, and at both intersections of roads, The case where it is calculated | required to connect storage penetration tanks may occur. In the case where the intersection angle of two roads is a gentle angle of 90 degrees or less, as described in Patent Document 1, a storage permeation tank on one road side and a storage permeation tank on the other road side are It is considered that a straight pipe provided with a universal joint pipe can be connected at the intersection.

  However, in urban roads, there are places where two roads intersect at an angle of 90 degrees or more acutely, and in such places, storage penetration that is arranged along both roads. It is difficult to connect the tanks with a straight pipe having a universal joint. In addition, it is difficult to work, and the work to remove the sediment and the like accumulated in the bent part and the storage and penetration tank adjacent to the bent part, that is, rainwater The maintenance work of the spill control facility is unavoidably difficult.

  The present invention has been made in view of the circumstances as described above, and it is expected that the storage and penetration tank will be formed along two roads intersecting at an acute angle, which is predicted to be widely constructed in urban areas in the future. In the rainwater outflow control facility to be arranged, storage permeation tanks arranged along the road can be easily connected to each other at the intersection of sharp roads in a state where water can pass through each other, and the bending thereof It is an object of the present invention to disclose a rainwater outflow suppression facility equipped with a storage permeation tank that makes maintenance of the storage permeation tank and the storage permeation tank adjacent thereto extremely easy.

  The rainwater outflow suppression facility according to the present invention is a rainwater outflow suppression facility provided with a storage permeation tank into which rainwater flows, and one storage permeation tank is at an angle of 90 degrees or less with respect to the other storage permeation tank. It arrange | positions in the ground and the said one and the other storage penetration tank are mutually connected through the vertical hole structure provided with the water flow hole.

  In a more specific form, the rainwater outflow control facility according to the present invention has a storage infiltration tank into which rainwater flows along two roads intersecting at an angle of 90 degrees or less, and the road A vertical hole structure having a water passage hole is formed at the intersection, and the storage permeation tank located in the vicinity of the intersection of two roads passes through the vertical hole structure having the water passage hole. Are connected to each other.

  In the rainwater outflow control facility according to the present invention, even when a storage infiltration tank into which a plurality of rainwater flows is arranged along two roads intersecting at an angle of 90 degrees or more acutely, The storage permeation tanks closest to the intersection are connected to each other via a vertical hole structure provided with water holes provided at the intersection of the road. Therefore, even if both storage permeation tanks are arranged at an acute angle of 90 degrees or less, it is very easy to connect them in a state where both water can be passed. In addition, the vertical hole structure itself can be easily cleaned by means such as vacuum as in the case of conventional manholes, and the vacuum penetrating means such as vacuum can be fed into the storage permeation tank from the water hole of the vertical hole structure. In addition, maintenance of rainwater outflow control facilities becomes easy.

  In the present invention, the “vertical hole structure having a water passage hole” means that rainwater can be sent to both storage permeation tanks connected thereto or drainage of both storage permeation tanks. It can be any structure provided that it can be used. Specifically, inflow dredging, outflow dredging, inflow outflow dredging, management dredging, etc. used in conventional rainwater outflow control facilities are exemplified.

  In one aspect of the rainwater outflow suppression facility according to the present invention, the vertical hole structure and the storage permeation tank are connected via a water passage pipe. In another aspect, the vertical hole structure has two side walls that can abut against the end surfaces of the two storage permeation tanks and have the water passage holes, and one of the two side walls. The one storage permeation tank is in direct contact with the other side wall of the other storage permeation tank.

  In the former case, the conventionally used cylindrical or square cylindrical inflow, outflow, inflow, outflow, or control rod can be used as is, and can be connected via a water pipe. , It is possible to prevent the storage permeation tanks located adjacent to each other from interfering with each other. Furthermore, a slight misalignment or the like generated between the vertical hole structure and the two storage permeation tanks connected thereto can be absorbed during construction. In the latter case, there is a merit that the work is good because the connection work between the water flow pipe and the storage permeation tank can be omitted.

  In one aspect of the rainwater outflow suppression facility according to the present invention, the two storage and penetration tanks are connected to each other by the vertical hole structure so that both the upper part and the lower part of each tank communicate with each other.

  In this aspect, the communication part formed in the lower part functions as a rainwater inflow port, and when rainwater from the vertical hole structure flows into the storage permeation tank, the air pushed out from the tank is communicated with the upper part. It is discharged to the ground surface through the vertical hole structure from the part. Therefore, unlike the conventional rainwater outflow control facility, there is no need to stand a vent hole on the ground for escaping the air in the storage and penetration tank, and the work of burying the storage and penetration tank in the ground becomes easy. In addition, since there are no air vents on the ground, road pavement can be easily performed without any rolling pressure failure.

  According to the present invention, storage and permeation tanks arranged along a road can be easily connected to each other at an intersection of sharp roads in a state in which water can pass through each other. A rainwater outflow control facility equipped with a storage permeation tank in the ground, which makes maintenance of the adjacent storage permeation tank extremely easy, is obtained.

The schematic seen from the side which shows an example of the rainwater outflow suppression facility by this invention. Schematic seen from the top which shows three examples of the rainwater outflow suppression facility by this invention. BRIEF DESCRIPTION OF THE DRAWINGS Schematic explaining an example of the vertical hole structure provided with the water flow hole used in the rainwater outflow suppression facility by this invention. It is the schematic explaining the other example of the vertical hole structure provided with the water flow hole used in the rainwater outflow suppression facility by this invention, and the storage penetration tank is also shown with the virtual line. The figure explaining an example of the water storage space formation member which forms a storage penetration tank.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
A rainwater outflow suppression facility A according to the present invention includes first and second storage and penetration tank groups 1A and 1B and a vertical hole structure 10 having water passage holes. FIG. 1 shows an example of the first storage and permeation tank group 1A and the vertical hole structure 10. Although not shown in FIG. 1, the second storage and permeation tank group 1B is also connected to the vertical hole structure 10. ing. The first storage and penetration tank group 1A and the second storage and penetration tank group 1B may have the same configuration or different configurations.

  First, the first storage and penetration tank group 1A will be described. In the example shown in FIG. 1, the first storage and penetration tank group 1A is configured by connecting three storage and penetration tanks 1 in series, but the number of the storage and penetration tanks 1 is arbitrary. The number may be two, or two or more. In the example of illustration, each storage penetration tank 1 is a thing of the same shape, and is equipped with the function to store rainwater temporarily and to infiltrate into the ground. The storage permeation tank 1 may be a conventionally known one as described in Patent Document 2 or 3 described above. As an example, the storage permeation tank 1 is formed by stacking resin water storage space forming members 31 shown in FIG. 5 in multiple stages while changing the direction by 90 degrees.

  This water storage space forming member 31 is described in Patent Document 3 described above, and a box row 32 in which a plurality of box-shaped portions 32a whose lower ends are opened is arranged in the X direction with a gap therebetween. Basically, it has a configuration in which the necessary number of columns are arranged while being spaced in the Y direction orthogonal to the. If necessary, a plurality of water storage space forming members 31 of different sizes are gathered together so that the directions of the box rows (rows of rows) 32 are the same direction to form the water storage space forming member 31. You can also.

  Then, a large number of the water storage space forming members 31 are stacked in the vertical direction in a posture in which the directions of the box rows (rows of convex portions) 32 alternately intersect each other at 90 degrees to form the storage and penetration tank 1. . In the example shown in the figure, the storage and infiltration tank 1 is flattened by spreading a base material such as crushed stone on the excavated support ground, and is disposed on the base material, and the whole is covered with a water-permeable sheet such as a nonwoven fabric. Thus, the storage permeation tank 1 is designated.

  In this example, the three storage permeation tanks 1 have the direction of the space region extending in the X direction between the box rows (rows made of convex portions) 32 and 32 in the water storage space forming member 31 stacked at the top. It is buried in the ground in the same direction. The adjacent storage permeation tanks 1, 1 are connected to each other by the upper communication pipe 4 and the lower communication pipe 5 connected to either of the space regions extending in the X direction. Connected.

  Next, an example of the rainwater outflow suppression facility according to the present invention will be described with reference to FIGS. As shown in FIG. 2 (a), the first storage and penetration tank group 1A described above is underground along one road R1 of two roads R1 and R2 intersecting at an acute angle α of more than 90 degrees. And one end reaches the vicinity of the intersection of the road. The second storage and penetration tank group 1B having the same configuration as the first storage and penetration tank group 1A is embedded in the ground along the other road R2, and one end thereof also reaches the vicinity of the intersection of the road. Yes. That is, the first storage and permeation tank group 1A and the second storage and permeation tank group 1B are configured such that one storage permeation tank is the other along the two roads R1 and R2 that intersect at an angle α of 90 degrees or less. It arrange | positions in the ground so that it may cross | intersect at 90 degrees or less with respect to the storage penetration tank.

  And both the storage permeation tanks 1a, 1a closest to the intersection of the first storage permeation tank group 1A and the second storage permeation tank group 1B are embedded in the intersections of the roads R1, R2. The vertical hole structures 10 are connected to each other so as to allow water to pass therethrough. The connection state will be described below.

  In the illustrated example, the vertical hole structure 10 is a cylindrical member made of concrete and has a manhole port 11 that opens to the ground as shown in FIG. The length in the vertical direction is such that when the vertical hole structure 10 is arranged at the intersection of the road in a vertical posture, the bottom surface 12 is positioned below the bottom surface of the storage and penetration tank 1 buried in the ground. Length.

  Two upper openings 13a and 13b are formed in the upper region of the vertical hole structure 10 so as to be spaced apart in the circumferential direction at substantially the same angle as the intersection angle α of the roads R1 and R2. Two lower openings 14a and 14b are formed at positions spaced apart from the upper openings 13a and 13b by a predetermined distance in the axial direction. A rainwater inlet 15a is formed at a position above the upper openings 13a and 13b. The vertical distance between the upper openings 13a and 13b and the lower openings 14a and 14b is substantially the same as the vertical distance between the upper communication pipe 4 and the lower communication pipe 5 in the storage permeation tank 1 described above. .

  At the time of construction, in parallel to the operation of burying the first storage and penetration tank group 1A and the second storage and penetration tank group 1B in the ground as described above, the vertical hole structure 10 is connected to the intersection of the road. The first storage and penetration tank group 1A and the second storage and penetration tank group 1B are embedded in the ground in a state where the manhole port 11 is the ground surface. At that time, the vertical hole structure 10 is arranged such that the upper openings 13a and 13b and the lower openings 14a and 14b face the end surfaces of the first storage and penetration tank group 1A and the second storage and penetration tank group 1B. Adjust the orientation.

  Next, the upper communication pipe 4 and the upper opening 13a of the vertical hole structure 10 in the storage permeation tank 1a located closest to the intersection of the first storage permeation tank group 1A are connected by an appropriate water pipe 13. The lower communication pipe 5 and the lower opening 14 a of the vertical hole structure 10 are connected by an appropriate water pipe 14. Further, in the same manner, the upper communication pipe 4 and the upper opening 13b of the vertical hole structure 10 in the storage permeation tank 1a located closest to the intersection of the second storage permeation tank group 1B are connected to an appropriate water pipe 13. The lower communication pipe 5 and the lower opening 14b of the vertical hole structure 10 are connected by an appropriate water pipe 14. In addition, it is suitable to use what consists of materials, such as a polyvinyl chloride-type resin and a polyethylene-type resin, as a water flow pipe 13 and 14, and it absorbs it even if some construction errors arise by it. Can do.

  Further, as shown in FIG. 2 (a), the intake weir 21 and the vertical hole structure of the road side groove 20 are connected via an appropriate water pipe 22 so that the overflow water from the road side groove 20 flows into the vertical hole structure 10. Ten rainwater inflow ports 15 a are connected by an appropriate water pipe 15. Then, the construction of the rainwater outflow suppression facility according to the present invention is completed by backfilling. In addition, as the water flow pipe 15, it is suitable to use what consists of materials, such as a polyvinyl chloride-type resin and a polyethylene-type resin.

  The state at the time of rainwater storage of said rainwater outflow suppression facility is demonstrated. When the amount of rainfall temporarily increases, rainwater from the road side groove 20 flows into the vertical hole structure 10 from the rainwater inlet 15a through the water pipe 22 and the water pipe 15. When the water surface level in the vertical hole structure 10 reaches the position of the lower openings 14a and 14b, the rainwater passes through the water pipes 14 and 14 and the lower communication pipe 5 and passes through the first storage and permeation tank group 1A and the second storage tank. It enters into both the storage permeation tanks 1a and 1a closest to the intersection of the permeation tank group 1B. The rainwater that has entered flows into the adjacent storage and penetration tanks 1b and 1c in both the first storage and penetration tank group 1A and the second storage and penetration tank group 1B.

  As the amount of rainwater inflow continues to increase, the level of rainwater in the storage and permeation tank gradually increases from the bottom to the top in the space formed by the stacked water storage space forming members 31. Accordingly, the air in each storage and permeation tank 1 is released to the atmosphere from the manhole port 11 of the vertical hole structure 10 through the upper communication pipe 4 and the water pipe 13. Therefore, it is not necessary to install a vent hole from the upper part of the storage permeation tank to the ground surface for deaeration.

  Rainwater is impregnated gradually into the ground through a water-permeable sheet such as a nonwoven fabric stored in the storage and permeation tanks 1 and 1 of both the first storage and permeation tank group 1A and the second storage and permeation tank group 1B. I will do it. As a result, it is possible to prevent the river from overflowing due to a sudden increase in water downstream. Moreover, since the 1st storage penetration tank group 1A and the 2nd storage penetration tank group 1B are in the state mutually connected via the vertical hole structure 10, sufficient water storage amount can also be ensured. Even in the structure, even if the first storage and permeation tank group 1A and the second storage and permeation tank group 1B intersect at an acute angle, an unreasonable construction is performed by connecting each other through the vertical hole structure 10. Without both, it is possible to easily and reliably connect both in a water-transmitting state. Although not shown, a road gutter can be provided along the road R1, and in such a case, the water pipe 22 is installed so that the overflow water from the road gutter flows into the vertical hole structure 10. Do work.

  Although not shown in the drawings, as a modification, the plurality of storage permeation tanks 1 constituting the first storage permeation tank group 1A and the second storage permeation tank group 1B are omitted from the lower communication pipe 5 and the upper communication pipes. You may connect so that only 4 may communicate. In this case, the lower openings 14 a and 14 b are also omitted in the vertical hole structure 10. In the case of using the storage permeation tank 1 of this form, the rainwater that has flowed into the vertical hole structure 10 is only the supernatant liquid after the sediment mixed in the rainwater is submerged in the vertical hole structure 10. And it comes in into the storage penetration tank 1 through the upper communication pipe 4, and it can avoid that earth and sand etc. accumulate in the storage penetration tank 1. FIG.

  Further, although not shown in the drawings, the plurality of storage permeation tanks 1 constituting the first storage permeation tank group 1A and the second storage permeation tank group 1B are omitted from the upper communication pipe 4 and only the lower communication pipe 5 is used. You may connect so that it may communicate with. In this case, also in the vertical hole structure 10, the upper openings 13a and 13b are omitted, and only the lower openings 14a and 14b are formed. In the case of using the storage permeation tank 1 of this form, it is necessary to install a vent hole from the upper part of the storage permeation tank to the ground surface so that no air pool is generated in the upper part of the storage permeation tank.

  FIG.2 (b) has shown the other example of the rainwater outflow suppression facility by this invention. Here, the two roads R1 and R2 are not T-shaped intersections, but V-shaped intersections bent at an angle of 90 degrees or less. The vertical hole structure 10 described above is installed at the intersection, the first storage and penetration tank group 1A is arranged along one road R1, and the second storage and penetration tank group 1B is arranged along the other road R2. ing.

  In this embodiment, rainwater may flow into the vertical hole structure 10 from a road side groove (not shown), or the vertical hole structure 10 may be formed in a shape that does not include the rainwater inlet 15a. In the latter case, although not shown, any rainwater inflow tank is provided in one or both of the first storage and penetration tank group 1A and the second storage and penetration tank group 1B. In that case, rainwater is stored in both the first storage and penetration tank group 1A and the second storage and penetration tank group 1B via the vertical hole structure 10 even when rainwater is flowing only from one of the rainwater inflow troughs. Therefore, the storage effect of the rainwater outflow control facility as a whole is improved.

  FIG.2 (c) has shown the other example of the rainwater outflow suppression facility by this invention. Here, as shown in FIG. 4, a vertical hole structure 10A having a square cross section is used, and its two side walls 16A and 16B are directly connected to the first storage and penetration tank group 1A and the second storage and penetration tank. It is the structure which touches the end surface of the said storage penetration tank 1a, 1a of the group 1B. Again, the two side walls 16A and 16B are formed with upper openings 13a, 13b and / or lower openings 14a, 14b, and if necessary, a storm water inlet 15a is formed. The However, in the construction, the use of the water flow pipes 13 and 14 can be omitted.

  In any of the above-described rainwater outflow suppression facilities, the maintenance of the first storage and penetration tank group 1B and the first storage and penetration tank group 1B can be facilitated by using the vertical hole structures 10 and 10A as management rods. Become.

A ... Rainwater outflow control facility,
R1, R2 ... Two roads intersecting at an angle α that is sharper than 90 degrees,
1 (1a to 1c) ... a storage permeation tank,
4 ... Upper communication pipe,
5 ... Lower communication pipe,
10, 10A ... vertical hole structure,
1A ... 1st storage penetration tank group,
1B ... 2nd storage penetration tank group,
13a, 13b ... upper openings formed in the vertical hole structure,
14a, 14b ... lower opening formed in the vertical hole structure,
15a ... Rainwater inflow port formed in the vertical hole structure,
13, 14, 15 ... water pipe,
20 ... road gutter,
21 ... Intake weir,
22: Water pipe.

Claims (5)

  A rainwater outflow suppression facility having a storage penetration tank into which rainwater flows in, and one storage penetration tank is disposed in the ground at an angle of 90 degrees or less with respect to the other storage penetration tank, The rainwater outflow suppression facility, wherein the one and the other storage permeation tanks are connected to each other through a vertical hole structure having a water passage hole.   A storage and penetration tank into which rainwater flows along two roads intersecting at an angle of 90 degrees or less is disposed in the ground, and a vertical hole structure having a water passage hole is formed at the intersection of the roads. A rainwater outflow control facility characterized in that storage and infiltration tanks located close to the intersection of two roads are connected to each other via a vertical hole structure having the water passage holes .   The rainwater outflow suppression facility according to claim 1 or 2, wherein the vertical hole structure and the storage permeation tank are connected via a water flow pipe.   The vertical hole structure has two side walls which can come into contact with the end surfaces of the two storage permeation tanks and have the water passage holes, and one of the two side walls has the one storage permeation tank. However, the rainwater outflow suppression facility according to claim 1 or 2, wherein the other side wall is in direct contact with the other side wall.   The rainwater outflow according to any one of claims 1 to 4, wherein the two storage permeation tanks are connected to each other by the vertical hole structure so that an upper part and a lower part of each tank communicate with each other. Control facility.

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