JP2009024453A - Assembly for rainwater storing and penetrating facility and rainwater storing and penetrating facility using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembly for a rainwater storing and penetrating facility reduced in cost by increasing the capacity of a storing and penetrating space and improving a water storage efficiency and maintainable easily and also provide the rainwater storing and penetrating facility. <P>SOLUTION: This assembly 1 for a rainwater storing and penetrating facility comprises a structure 10 for the rainwater storing and penetrating facility and a water streaming groove member 20. The structure 10 for the rainwater storing and penetrating facility comprises an internal space 100 extending in the longitudinal direction L. The water streaming groove member 20 is formed in a halved tubular shape, and extends through the internal space 100 in the longitudinal direction L. The assembly 1 is combined with a water permeable layer 5 to form the rainwater storing and penetrating facility. The assembly 1 for the rainwater storing and penetrating facility is buried in the ground. The water permeable layer 5 is formed around the assembly 1 for the rainwater storing and penetrating facility. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an assembly for a rainwater storage and penetration facility and a rainwater storage and penetration facility.

  The rainwater storage and penetration facility is a rainwater storage facility that is constructed underground as a storage space for collected rainwater, and temporarily stores the collected rainwater in the ground and then slowly discharges it into the ground for dispersion. Including rainwater infiltration facilities. Rainwater storage and infiltration facilities are intended for effective use of rainwater, for the purpose of preventing urban inundation disasters caused by sudden inflow of rainwater into rivers and underground stormwater pipe networks, or for recharging groundwater and suppressing land subsidence. For the purpose, it is built underground.

  By the way, various types of rainwater storage and penetration facilities of this type have been developed according to specific applications. For example, the rainwater storage and infiltration facility disclosed in Patent Document 1 is a so-called infiltration trench, and is a waterway facility in which a plurality of waterway members are embedded in the ground and connected in the cylinder axis direction. . The water channel member has a cylindrical wall having a water-permeable portion and a water-impervious portion, and at least a part of the water-impervious portion is provided so as to extend in the cylinder axis direction. And in the water channel facility currently disclosed by patent document 1, the water channel member is embed | buried in the crushed stone, a crushed stone filling space (storage penetration space) is constructed around the water channel member, and rainwater discharged from the water channel member is temporarily stored. And gradually disperse and penetrate into the ground.

  However, according to the water channel facility disclosed in Patent Document 1, the following problems occur. First, since the storage penetration space is configured using crushed stone, the space ratio is low, and a sufficient capacity cannot be ensured. In particular, it is known that urban flooding disasters, which have become a major social problem in recent years, occur when rainwater caused by short-time torrential rains suddenly flows into rivers and underground rainwater pipeline networks. From the viewpoint of preventing such urban flooding disasters, the storage and penetration space of this type of rainwater storage and penetration facility must be large enough to store a large amount of rainwater.

  In addition, since sediment and dust and the like infiltrate and accumulate in rainwater and accumulate in the storage and penetration space, it is necessary to periodically remove these deposits from the viewpoint of securing capacity. On the other hand, when the storage permeation space is configured using crushed stone, maintenance work of removing deposits is impossible. Moreover, in order to remove the deposits accumulated in the storage penetration space, it is necessary to re-lay all the crushed stones, which increases the cost.

  Furthermore, according to the configuration of the storage permeation space disclosed in Patent Document 1, a problem arises in relation to the water channel member. That is, in the configuration in which the crushed stone is filled around the water channel member to form the storage infiltration space, the water channel member withstands the impact applied from the crushed stone, the weight, and further the earth pressure from the surroundings to ensure the mechanical strength. There is a tendency to become thicker and heavier than necessary. Therefore, transportation cost and construction cost cannot be reduced.

  Moreover, according to the structure using a so-called perforated pipe as the water channel member, the manufacturing cost increases due to the complexity of the pipe structure.

  Further, according to the configuration using the perforated pipe as the water channel member, there is a risk that the hole is clogged due to earth and sand or dust contained in rainwater. Moreover, since the water channel members are usually connected over a long distance, earth and sand and dust cannot be removed when clogging occurs.

In addition, according to the configuration using the perforated pipe, the hole diameter for each hole tends to be small from the viewpoint of securing the mechanical strength necessary for the water channel member, and the amount of drainage from the hole is limited. That is, rainwater generated by short-time concentrated heavy rain cannot be quickly discharged into the storage and penetration space.
Japanese Patent Laid-Open No. 2003-27565

  An object of the present invention is to provide an assembly for a rainwater storage and penetration facility and a rainwater storage and penetration facility that can increase the capacity of the storage and penetration space and improve the water storage efficiency.

  Another object of the present invention is to provide an assembly for a rainwater storage and penetration facility and a rainwater storage and penetration facility that can reduce costs.

  Yet another object of the present invention is to provide an assembly for a rainwater storage and infiltration facility and a rainwater storage and infiltration facility that can avoid sediment accumulation or can be easily maintained.

  Yet another object of the present invention is to provide an assembly for a rainwater storage and infiltration facility and a rainwater storage and infiltration facility that can prevent the occurrence of an urban inundation disaster.

  In order to solve the above-described problems, the rainwater storage and penetration facility assembly and rainwater storage and penetration facility according to the present invention include the following four aspects. Hereinafter, the configuration and effect of each aspect will be described.

1. About the assembly for rainwater storage and penetration facilities The assembly (assembly) for rainwater storage and penetration facilities which concerns on this invention contains the structure (structure) for rainwater storage and penetration facilities, and a water flow groove member. The structure has an internal space extending in the longitudinal direction, and the water flow groove member has a half-cylindrical shape, and penetrates the internal space of the structure along the longitudinal direction.

  According to the structure described above, in the assembly, the water flow groove member penetrates the internal space of the structure along the longitudinal direction, and therefore, a wide area corresponding to the space capacity of the internal space is formed around the water flow groove member. A storage penetration space can be secured.

  Moreover, since the water groove member has penetrated the internal space of the structure body along the longitudinal direction, it is protected from the impact from the outside, a load, etc. by the structure body. Therefore, it is possible to reduce the thickness of the water passage groove member and reduce the cost.

  Since the water flow groove member is protected from an external impact, a load, and the like by the structure, it can take a half-cylindrical structure. According to this structure, when rainwater flows into the water channel member, rainwater can be smoothly overflowed from the open surface, so that it is possible to quickly drain rainwater into the internal space of the structure. it can.

  Further, according to the structure in which the water channel member can take a half-cylindrical structure, since the open surface extends in the longitudinal direction of the pipe, earth and sand and dust are collected in the rainwater flowing inside the water channel member. Even if they are mixed, there is no inconvenience that clogging occurs due to the earth and sand and dust. In addition, since the open surface extends in the longitudinal direction of the pipe, it is possible to easily remove earth and sand accumulated in the water passage groove member.

  According to the structure in which the water flow groove member can take a half-cylindrical structure, the manufacturing cost can be reduced.

  Specifically, the structure according to the present invention includes two side plate members and a plurality of partition members. The two side plate members are arranged at an interval so that the respective plate surfaces face each other. The plurality of partition members have a flat shape as a whole, are arranged with a space in one direction between the opposing surfaces of the two side plate members, and are coupled to the side plate members at both ends of the plate surface. The water flow groove member penetrates the plurality of partition members along the longitudinal direction of the structure. According to this structure, all the advantages of the assembly described above can be obtained, and earth and sand and dust accumulated in the structure can be removed from the interval between the adjacent partition members.

2. About the rainwater storage penetration facility which concerns on a 1st aspect The rainwater storage penetration facility which concerns on a 1st aspect contains an assembly and a water permeable layer. The assembly includes a structure and a water channel member, and is embedded in the ground. The structure has an internal space extending in the longitudinal direction. The water flow groove member has a half-cylinder shape and penetrates the internal space along the longitudinal direction. The water permeable layer is provided around the assembly.

  According to the structure mentioned above, the rainwater storage penetration facility which has all the advantages of the assembly concerning the present invention can be provided. For example, since the rainwater storage and penetration facility according to the first aspect can secure a large storage and penetration space in the basement by burying the assembly, the capacity of the storage and penetration space can be increased and the storage efficiency can be increased. Can be improved and urban flooding disasters can be prevented.

  In addition, since a water permeable layer is provided around the assembly, rainwater collected in the internal space of the structure is temporarily stored in the ground, and then slowly discharged into the ground to disperse and penetrate. In addition, the surrounding earth and sand can be prevented from entering the internal space of the structure.

3. About the rainwater storage penetration facility which concerns on a 2nd aspect The rainwater storage penetration facility which concerns on a 2nd aspect has an assembly and a U-shaped groove | channel. The rainwater storage and penetration facility includes an assembly and a permeable layer. The assembly includes a structure and a water channel member, and is embedded in the ground. The structure has an internal space extending in the longitudinal direction. The water flow groove member has a half-cylinder shape and penetrates the internal space along the longitudinal direction. The U-shaped groove is disposed in such a relationship that the open surface faces the bottom surface portion of the assembly for rainwater storage and penetration facilities, and extends along the arrangement direction of the assembly for rainwater storage and penetration facilities.

  According to the structure mentioned above, the rainwater storage penetration facility which has all the advantages of the assembly concerning the present invention can be provided. Furthermore, the rainwater storage and infiltration facility according to the second aspect has a U-shaped groove, and the U-shaped groove is disposed with the open surface facing the bottom surface portion of the assembly for the rainwater storage and infiltration facility. It extends along the arrangement direction of the assembly for the seepage facility. According to this configuration, dirt and dust accumulated inside the assembly can be cleaned by flowing down or sucking into the U-shaped groove, so that sediment accumulation is avoided or maintenance is easy. Can be done.

  Furthermore, the assembly which concerns on this invention WHEREIN: The water flow groove member is a half cylinder shape, Comprising: The internal space of a structure is penetrated along the longitudinal direction. According to this structure, rainwater overflowing from the water channel member falls onto the earth and sand accumulated in the structure, and the earth and sand and dust are guided to the U-shaped groove by the water pressure (impact) of the rain water. be able to. Therefore, accumulation of earth and sand can be avoided or maintenance can be easily performed.

4). Rainwater storage and penetration facility according to the third aspect The rainwater storage and penetration facility according to the third aspect includes an assembly and a rainwater tank. The rainwater storage and penetration facility includes an assembly and a permeable layer. The assembly includes a structure and a water channel member, and is embedded in the ground. The structure has an internal space extending in the longitudinal direction. The water flow groove member has a half-cylinder shape and penetrates the internal space along the longitudinal direction. The rainwater tank has an internal space extending in the longitudinal direction and a first inflow / outflow hole. In the structure, the water flow groove member is connected to the first inflow / outflow hole.

  According to the structure mentioned above, the rainwater storage penetration facility which has all the advantages of the assembly concerning the present invention can be provided. For example, since the rainwater storage and penetration facility according to the third aspect can secure a wide storage and penetration space in the basement by burying the assembly, the storage and penetration space for the rainwater collected in the rainwater basin can be secured. It is possible to increase the capacity and improve the water storage efficiency and prevent urban flooding disasters.

  In the rainwater storage / penetration facility according to the third aspect, more preferably, the rainwater tank has a second inflow / outflow hole. The second inflow / outflow hole is arranged with a difference in height on the bottom surface side of the eaves from the first inflow / outflow hole, and is connected to a storm water main constituting the underground stormwater pipe network. According to this configuration, in particular, in the case of urban inundation disaster, when rainwater flows backward from the rainwater main to the inside of the rainwater tank, the water line in the rainwater tank rises and the overflowed water passes through the first inflow / outflow hole. It can guide to the inside of the rainwater storage and penetration assembly through the corner groove member. Therefore, it is possible to prevent urban flood disasters.

As described above, according to the present invention, the following effects can be obtained.
(1) It is possible to provide an assembly for a rainwater storage and penetration facility and a rainwater storage and penetration facility capable of increasing the capacity of the storage and penetration space and improving the water storage efficiency.
(2) It is possible to provide an assembly for rainwater storage and penetration facilities and a rainwater storage and penetration facility that can reduce costs.
(3) To provide an assembly for a rainwater storage and infiltration facility and a rainwater storage and infiltration facility that can avoid sediment accumulation or can easily perform maintenance and management.
(4) It is possible to provide an assembly for rainwater storage and penetration facilities and a rainwater storage and penetration facility that can prevent the occurrence of urban flood disasters.

  FIG. 1 is a perspective view of an assembly for a rainwater storage and penetration facility according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an exploded structure of the assembly shown in FIG.

  Referring to FIGS. 1 and 2, an assembly for rainwater storage and penetration facility (assembly) according to an embodiment of the present invention is a structure (structure) 10 for rainwater storage and penetration facility, a water flow groove member 20, and the like. including.

  The structure 10 has a box shape or a cylindrical shape having an internal space 100 defined by at least side walls, and the internal space 100 extends in a longitudinal direction indicated by an arrow L. More specifically, the structure 10 shown in FIGS. 1 and 2 includes four partition members 11 and two side plate members 12.

  The partition member 11 is preferably an integrally molded product using a synthetic resin material. As the synthetic resin material used, polyethylene (PE), polypropylene (PP), vinyl chloride resin (PVC), etc. are generally used from the viewpoints of ease of molding, corrosion resistance, lightness, material strength, material cost, etc. is there.

  The partition member 11 is preferably frame-shaped or frame-shaped, and is configured in a substantially rectangular shape by two sides in the longitudinal direction L and two sides in the height direction T. Shape). Furthermore, the partition member 11 has a penetrating structure in which the inside of the frame surface penetrates from one surface to the other surface, and has a penetrating portion 110 divided into six lattices by ribs 111. The through portion 110 reduces the weight of the partition member 11 and reduces the manufacturing cost, and improves the fluidity of rainwater in the internal space 100.

  Furthermore, the partition member 11 is on the side surface in the longitudinal direction L and on the side surface in the height direction T at the corners of the plate surface where the two sides in the longitudinal direction L and the two sides in the height direction T intersect. Each has a latching slit 112 extending toward the thickness dimension of the plate surface.

  On the other hand, the side plate member 12 is preferably an integrally molded product made of the same synthetic resin material as that of the partition member 11, and has two sides in the longitudinal direction L of the plate surface and the height direction T of the plate surface. It has two sides and is molded into a flat shape (plate shape) as a whole. The side plate member 12 has a U-shaped cross section having a support edge rising on the same surface side at both end edges of the plate surface viewed in the height direction T, and a plurality of rib blocks are erected on one surface. More specifically, the side plate member 12 has a fitting groove 120, a hook hook 121, and a water passage hole 122.

  The fitting groove 120 is a concave groove whose bottom surface is the plate surface of the side plate member 12 between the rising side surfaces of adjacent rib blocks. The fitting grooves 120 extend along the height direction T in the plate surface of the side plate member 12, and are arranged at intervals in the longitudinal direction L orthogonal to the height direction T. The hooks 121 are provided at both ends of the fitting groove 120 in the height direction T, and are fitted into the hooking slits 112. According to this structure, the assembly can reduce manufacturing costs, transportation costs, and assembly costs by reducing the number of components.

  The side plate member 12 has a plurality of water passage holes 122 penetrating from one surface to the other surface in the grid of the rib block. The water passage hole 122 is used for discharging temporarily stored rainwater into the ground when the assembly is installed in the underground storage and penetration space of the rainwater storage and penetration facility.

  The two side plate members 12 are arranged in the width direction W with a space therebetween so that the respective plate surfaces face each other. The four partition members 11 are arranged in a relationship orthogonal to the plate surface of the side plate member 12 between the opposing surfaces of the two side plate members 12. Each of the partition members 11 is disposed at an interval in the longitudinal direction L of the assembly 1 indicated by an arrow so that the plate surfaces face each other. The number of partitions 11 used and the intervals are examples, and can be determined in advance by assuming specific construction conditions such as the scale of a specific rainwater storage and infiltration facility related to construction. For example, in the assembly, as the pressing force such as earth pressure increases, the number of partition members 11 per unit length increases and the interval tends to narrow in order to ensure mechanical strength. On the other hand, the interval between the side plate members 12 is determined according to the longitudinal direction L of the partition member 11.

  The four partition members 11 are coupled to the side plate member 12 at both sides facing the plate surface of the side plate member 12 by concave and convex fitting (hook fitting) between the hooking slit 112 and the hooking hook 121.

  The assembly according to the present invention is characterized in that the water flow groove member 20 is passed through the structure 10. That is, the water flow groove member 20 is a half cylinder having an open surface 21 on the upper surface side like a so-called rain gutter. It penetrates the partition member 11 and penetrates the internal space 100 along the longitudinal direction L as a whole.

  More specifically, in the partition member 11, one of the through portions 110 is an insertion hole 110. The water groove member 20 penetrates the insertion hole 110 of the plurality of partition members 11 along the arrangement direction (longitudinal direction L) of the side plate member 12 and penetrates the internal space 100 along the longitudinal direction L as a whole. ing.

  The water flow groove member 20 shown in FIGS. 1 and 2 has a square cross section, but this structure is due to the insertion hole 110 of the partition member 11 having a square shape. Therefore, when the insertion hole 110 has a circular shape, or when a cradle or the like is installed in the insertion hole 110, the water groove member 20 may have a circular cross section.

  According to the structure of the assembly described with reference to FIGS. 1 and 2, the structure 10 has the internal space 100 extending in the longitudinal direction L, and the water flow groove member 20 extends the internal space 100 in the longitudinal direction L. Therefore, a wide storage and penetration space corresponding to the space capacity of the internal space 100 can be secured around the water channel member 20.

  Further, since the water flow groove member 20 penetrates the internal space 100 along the longitudinal direction L, the structure 10 (the partition member 11 and the side plate member 12) is protected from an external impact, a load, and the like. ing. Therefore, the water flow groove member 20 can be thinned without considering an external impact or a load, and the cost can be reduced. On the other hand, since the porous pipe used in the conventional rainwater storage and penetration facility is filled with crushed stones in the surroundings, a problem occurs that the surface is damaged by an impact applied from the crushed stones. Conventionally, in a configuration in which crushed stone is filled around the perforated pipe to form a storage infiltration space, the perforated pipe has mechanical strength to withstand the impact applied from the crushed stone, weight, and earth pressure from the surroundings. From the need to ensure, there is a tendency to increase the thickness and weight. Therefore, transportation cost and construction cost cannot be reduced.

  Since the water flow groove member 20 is protected from an external impact, a load, and the like by the structure 10, it can take a half-cylindrical structure. According to this structure, when rainwater flows into the water flow groove member 20, rainwater can be smoothly overflowed from the open surface 21, so that the rainwater can be quickly discharged to the internal space 100. it can. In contrast, perforated pipes used in conventional rainwater storage and infiltration facilities tend to have smaller pore diameters from the viewpoint of ensuring the required mechanical strength, and the amount of drainage from the holes is limited. That is, rainwater generated by short-time concentrated heavy rain cannot be quickly discharged into the storage and penetration space.

  Further, according to the structure in which the water flow groove member 20 can take a half-cylindrical structure, even if earth and sand or dust is mixed in the rainwater flowing inside the water flow groove member 20, There is no inconvenience of clogging. In addition, since the open surface 21 extends in the longitudinal direction L of the pipe, earth and sand accumulated in the water channel member 20 can be easily removed. On the other hand, the perforated pipe used in the conventional rainwater storage and penetration facility has a risk of clogging the hole due to earth and sand or dust contained in the rainwater. Moreover, since the porous pipes are connected over a long distance, earth and sand and dust cannot be removed when clogging occurs.

  According to the structure in which the water flow groove member 20 can take a half-cylindrical structure, the manufacturing cost can be reduced. On the other hand, according to the configuration using the conventional perforated pipe, the manufacturing cost increases due to the complexity of the pipe structure.

  The structure 10 according to an embodiment of the present invention includes two side plate members 12 and a plurality of partition members 11. The two side plate members 12 are arranged at an interval so that the respective plate surfaces face each other. The plurality of partition members 11 have a flat shape as a whole, are arranged with a space in one direction between the opposing surfaces of the two side plate members 12, and are coupled to the side plate members 12 at both ends of the plate surfaces. The water flow groove member 20 penetrates the plurality of partition members 11 along the longitudinal direction L of the assembly 1. According to this structure, all the advantages of the above-described assembly can be obtained, and earth and sand and dust accumulated inside the assembly 1 can be removed from the interval between the adjacent partition members 11. Therefore, accumulation of earth and sand can be avoided or maintenance can be easily performed.

  The assembly described with reference to FIGS. 1 and 2 is used in a rainwater storage and infiltration facility in combination with a rainwater tank or a permeable layer. Next, a rainwater storage and penetration facility using the assembly according to the present invention will be described with reference to FIGS. FIG. 3 is a plan view showing the rainwater storage and penetration facility according to an embodiment of the present invention with a part omitted, FIG. 4 is a perspective view showing a part of the rainwater storage and penetration facility shown in FIG. FIG. 5 is a cross-sectional view showing a part of the rainwater storage and penetration facility shown in FIG. 3 to 5, the same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.

  First, the rainwater storage and penetration facility shown in FIG. 3 is an embodiment when the assembly 1 described with reference to FIGS. 1 and 2 is used in a road drainage system. The assembly 1 is embedded under the L-shaped side grooves 3 provided on both sides of the road, and communicates (bypasses) the rainwater tank 4 that is embedded adjacently with an interval of 20 to 30 m.

  The rainwater storage and penetration facility shown in FIG. 3 will be described in detail with reference to FIGS. 4 and 5. The assembly 1 shown in FIG. 4 includes a plurality of structures 10 and a plurality of water flow groove members 20, and is embedded in the ground. The plurality of structures 10 are continuously arranged in the longitudinal direction L, and constitute an integrated assembly 1 as a whole. Although not shown, the plurality of structures 10 are continuously arranged in either the longitudinal direction L, the width direction (W), or the height direction T according to the scale of the rainwater storage and penetration facility. You can also.

  Further, referring to FIG. 4, the assembly 1 includes a face plate member 13 and a shielding plate 14. The face plate member 13 is provided on the upper end surface of the assembly 1 as viewed in the height direction T, and is used as a lid that prevents inflow of earth and sand, dust and the like into the assembly 1.

  The face plate member 13 is molded in advance so as to have substantially the same planar view shape as the end face in the height direction T of the assembly 1, and preferably the partition member 11 described with reference to FIGS. It is an integrally molded product configured using the same synthetic resin material as the side plate member 12.

  The shielding plate 14 is provided on at least one side surface of the assembly 1 viewed in the longitudinal direction L, and is attached to prevent inflow of earth and sand, dust and the like into the assembly 1. The shielding plate 14 has a plate surface substantially the same as the front-view shape of the partition member 11, and is preferably an integrally molded product configured using the same synthetic resin material as the partition member 11 and the side plate member 12. . The shielding plate 14 has an insertion hole 140 at an appropriate location in the plane. The insertion hole 140 has a through structure that penetrates from one surface to the other surface, and is used to connect the water channel member 20 to an external pipe or the like. Since the shielding plate 14 is attached to prevent inflow of earth and sand, dust, and the like into the assembly 1, when a plurality of structures 10 are connected in the longitudinal direction L, the end faces at both ends in the longitudinal direction L are It will be covered by the shielding plate 14. Although not necessarily clear from FIG. 4, a shielding plate 14 having an insertion hole 140 is also provided on the other end surface in the longitudinal direction L of the connected assembly 1.

  Furthermore, the rainwater storage and penetration facility shown in FIG. 5 has the assembly 1 shown in FIG. 4, the rainwater tank 4, the water permeable layer 5, the water supply pipe 6, and the rainwater main pipe 7.

  The assembly 1 is embedded in the ground. The assembly 1 is a so-called permeation trench, and a plurality of structures 10 are continuously arranged in the longitudinal direction L, more specifically in the rainwater flow direction indicated by the arrow L2.

  The periphery of the assembly 1 is covered with a water permeable layer 5 made of a well-known nonwoven fabric or the like, and rainwater flowing through the assembly 1 is discharged into the ground through the water permeable layer 5 and is assembled by the water permeable layer 5. Inflow of earth and sand into the interior of the solid 3 is blocked. The permeable layer 5 can be appropriately changed according to the use of the rainwater storage and penetration facility. For example, a rainwater storage facility can be configured by changing the water permeable layer 5 such as a nonwoven fabric to a water shielding layer (5) such as a vinyl sheet.

  The rainwater trough 4 is a so-called manhole (an enclosure), which is an internal space 400 defined by an inner bottom surface and side walls, a first inflow / outflow hole 41, a second inflow / outflow hole 42, and a soil. And a reservoir 43.

  The first inflow / outflow hole 41 penetrates the peripheral wall from the inside to the outside, and the water flow groove member 20 is connected to the first inflow / outflow hole 41. Both ends of the water flow groove member 20 of the assembly 1 are connected to the inflow / outflow holes 41 of the adjacent rainwater troughs 4. That is, rainwater collected in the rainwater trough 4 flows into the structure 10 from the water channel member 20 and is dispersed and discharged into the ground through the water permeable layer 5 through the water holes 122 and the like. The rainwater that has flowed into the structure 10 flows down the inner space 100 in the flow direction M according to the amount of inflow, flows down to the rainwater tank 4 installed on the other end side of the structure 10, and forwards to the next infiltration trench. It is made to flow down.

  The second inflow / outflow holes 42 penetrate the peripheral wall from the inside to the outside, and are arranged with a height dimension T1 from the bottom. The earth retaining portion 43 is formed in a space from the inner bottom surface to the second inflow / outflow hole 42. That is, the capacity of the soil reservoir 43 can be adjusted by the height dimension T1 of the second inflow / outflow hole 42.

  The second inflow / outflow hole 42 is formed at a position lower than the first inflow / outflow hole 41 by the height dimension T2. One end of the water pipe 6 is connected to the second inflow / outflow hole 42, and the other end is connected to the rainwater main pipe 7 constituting the underground rainwater pipe network. That is, the rainwater collected in the rainwater tank 4 flows into the rainwater main pipe 7 from the second inflow / outflow hole 42 and flows down to the underground rainwater pipe network.

  Advantages of the rainwater storage and penetration facility shown in FIGS. 3 to 5 will be described with reference to FIGS. 6 to 9. FIG. 6 is a cross-sectional view showing a rainwater storage and penetration facility according to another embodiment of the present invention with a part thereof omitted. 7 to 9 are cross-sectional views showing a part of the usage state of the rainwater storage and penetration facility shown in FIG. 6 to 9, the same components as those shown in FIGS. 1 to 5 are denoted by the same reference numerals.

  First, referring to FIG. 6, the rainwater R that has flowed into the rainwater basin 4 from the L-shaped side groove 3 at the time of light rain (normal time) flows down from the second inflow / outflow hole 42 to the stormwater main 7 through the water pipe 6. The Deposits 8 such as earth and sand and dust accumulated during normal use are temporarily stored in a soil reservoir 43 secured inside the ridge. Since the second inflow / outflow pipe 42 is arranged at the upper boundary T1 of the area of the earth retaining portion 43, mud that accumulates above the upper boundary T1 flows down to the rainwater main 7 to prevent accumulation. Is done. Further, the deposit 8 accumulated in the soil reservoir 43 is removed by vacuum or the like during the periodic inspection.

  Next, referring to FIG. 7, when there is a large amount of heavy rain in a short period of time, such as during a sunset or a typhoon, the water line WL inside the rainwater basin 4 rises and rainwater that flows down to the rainwater main 7. R temporarily flows back (overflow) from the rainwater main 7 and is stored inside the rainwater tank 4.

  Next, referring to FIG. 8, the amount of backflow (overflow) from the rainwater main 7 shown in FIG. 7 increases, and the water line WL in the rainwater tank 4 is pushed up to the first inflow / outflow hole 41. Then, the overflowed rainwater R flows into the water flow groove member 20 connected to the first inflow / outflow hole 41.

  Next, referring to FIG. 9, the rainwater R flowing into the water flow groove member 20 according to FIG. 8 overflows from the open surface 21 into the assembly 1 according to the amount of backflow (overflow), and the internal space 100. It is stored in. The stored rainwater R is slowly discharged from the internal space 100 into the ground over time through the water passage holes 122 of the side plate member 12 and the water permeable layer 5, and is dispersed and infiltrated. On the other hand, since the water channel member 20 bypasses the adjacent rainwater trough 4, the rainwater R flowing into the water channel member 20 is sequentially sent to the rainwater trough 4 on the downstream side, The water line WL in the rain gutter 4 is kept constant.

  According to the structure of the rainwater storage and infiltration facility shown in FIGS. 3 to 5 and the use state shown in FIGS. 6 to 9, the rainwater storage having all the advantages of the assembly 1 described with reference to FIGS. Infiltration facilities can be provided. For example, in the rainwater storage and penetration facility, since the assembly 1 is embedded, the structure 10 has a box shape in which a plurality of partition members 11 and a plurality of side plate members 12 are combined. A wide storage and penetration space can be secured around the water flow groove member 20 that is being used. Therefore, it is possible to increase the capacity of the storage infiltration space and improve the water storage efficiency, and prevent urban flooding disasters. On the other hand, the conventional rainwater storage and penetration facility is configured to form a storage and penetration space (internal space 100) around the porous pipe by embedding the porous pipe in crushed stone. Since the storage permeation space is composed of crushed stone, the space ratio is low, and a sufficient capacity cannot be ensured. Therefore, conventional rainwater storage and penetration facilities cannot prevent urban flooding disasters caused by short-time concentrated heavy rain.

  According to the structure in which the water flow groove member 20 is inserted into the structure 10, there is no need to fill the periphery of the water flow groove member 20 with crushed stone, so there is no risk that the water flow groove member 20 is damaged by the crushed stone. .

  In the rainwater storage and penetration facility, the rainwater tank 4 has a first inflow / outflow hole 41. The first inflow / outflow hole 41 is formed at a position higher than the second inflow / outflow hole 42 by the height dimension T2. According to this configuration, for example, when rainwater R flows backward from the rainwater main 7 to the rainwater tank 4 during a heavy rain, the water line WL in the rainwater tank 4 rises and only the overflowed water is collected into the rainwater storage and infiltration assembly. 1 can be guided inside. That is, the height dimension difference T2 between the first and second inflow / outflow holes 41 and 42 adjusts the water supply limit to the assembly 1 due to the overflow in the rainwater trough 4. Therefore, it is possible to prevent the occurrence of urban flood disasters.

  Since the first inflow / outflow hole 41 is formed at a position higher than the second inflow / outflow hole 42, earth and sand and dust are separated from the rainwater R, and only the clean supernatant rainwater R is separated into the internal space 100. While sending water, the deposit 8 can be stored in the soil reservoir 43. Therefore, it is possible to avoid the inconvenience of sediment accumulation in the internal space 100 or to easily perform maintenance management. On the other hand, in the conventional rainwater storage and penetration facility, since the storage and penetration space is configured using crushed stone, the maintenance work of removing the deposit 8 is impossible. Moreover, in order to remove the deposit 8 accumulated in the storage permeation space, it is necessary to re-lay all the crushed stones, which increases the cost.

  FIG. 10 is a partial cross-sectional view showing a rainwater storage and penetration facility according to another embodiment of the present invention with a part thereof omitted. 10, the same components as those shown in FIGS. 1 to 9 are denoted by the same reference numerals.

  The rainwater storage and penetration facility shown in FIG. 10 has a rainwater storage and penetration facility assembly 1, a water permeable layer 5, and a U-shaped groove 9. The U-shaped groove 9 is disposed such that the open surface 91 faces the bottom surface portion of the rainwater storage and penetration facility assembly 1 and extends along the arrangement direction (longitudinal direction L) of the rainwater storage and penetration facility assembly 1. ing.

  According to the structure of the rainwater storage and penetration facility described with reference to FIG. 10, it is possible to provide a rainwater storage and penetration facility having all the advantages described with reference to FIGS. 1 to 9.

  Furthermore, the rainwater storage and penetration facility according to an embodiment of the present invention has a U-shaped groove 9, and the U-shaped groove 9 has a relationship in which the open surface 91 faces the bottom surface portion of the rainwater storage and penetration facility assembly 1. And extending along the arrangement direction (longitudinal direction L) of the rainwater storage and penetration facility assembly 1. According to this configuration, since sediment and dust accumulated in the assembly 1 can be cleaned by flowing down or sucking into the U-shaped groove 9, sediment accumulation is avoided or maintained. Can be easily performed.

  Furthermore, in the assembly 1 according to the present invention, the water flow groove member 20 has a half cylinder shape and penetrates the internal space 100 along the longitudinal direction L. According to this structure, the rainwater R overflowing from the water flow groove member 20 falls onto the earth and sand accumulated in the assembly 1, and the water pressure (impact) of the rain water R causes the earth and sand and dust to be U-shaped. It can be guided to the groove 9. Therefore, accumulation of earth and sand can be avoided or maintenance can be easily performed.

  Although the contents of the present invention have been specifically described above with reference to the preferred embodiments, it is obvious that those skilled in the art can take various modifications based on the basic technical idea and teachings of the present invention. It is.

It is a perspective view of the assembly for rain water storage penetration facilities concerning one embodiment of the present invention. It is a perspective view which shows the decomposition | disassembly structure of the assembly shown in FIG. It is a top view which abbreviate | omits and shows the rainwater storage penetration facility which concerns on one Embodiment of this invention. It is a perspective view which extracts and shows some rainwater storage penetration facilities shown in FIG. It is sectional drawing which abbreviate | omits and shows a part of rain water storage penetration facility shown in FIG. It is sectional drawing which abbreviate | omits one part and shows about the rainwater storage penetration facility which concerns on another embodiment of this invention. It is sectional drawing which abbreviate | omits and shows the use condition of the rainwater storage penetration facility shown in FIG. It is sectional drawing which abbreviate | omits one part and shows about the use condition of the rainwater storage penetration facility shown in FIG. It is a fragmentary sectional view which extracts and shows a part about the use condition of the rainwater storage penetration facility shown in FIG. It is a fragmentary sectional view which abbreviate | omits and shows the rainwater storage penetration facility which concerns on another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Assembly for rainwater storage and penetration facility 10 Structure for rainwater storage and penetration facility 11 Partition member 12 Side plate member 100 Internal space 20 Water flow groove member 4 Rainwater tank 41, 42 First and second inflow / outflow holes 5 Water permeable layer / blocking Water layer 7 Rainwater main 9 U-shaped groove 91 Open surface L Longitudinal direction W Width direction T Height direction

Claims (7)

An assembly for a rainwater storage and penetration facility including a structure for a rainwater storage and penetration facility and a water channel member,
The structure has an internal space extending in the longitudinal direction,
The water flow groove member is a half cylinder, and penetrates the internal space along the longitudinal direction.
Assembly for rainwater storage and penetration facilities. The assembly for rainwater storage and penetration facility according to claim 1, wherein the structure further includes two side plate members and a plurality of partition members,
The two side plate members are disposed at an interval in such a relationship that the plate surfaces face each other.
The plurality of partition members are flat as a whole, are arranged at intervals in the longitudinal direction between the opposing surfaces of the two side plate members, and are coupled to the side plate members at both ends of the plate surface. ,
The water flow groove member penetrates the plurality of partition members along the longitudinal direction.
Assembly for rainwater storage and penetration facilities. A rainwater storage and penetration facility comprising an assembly for a rainwater storage and penetration facility and a water permeable layer,
The assembly includes a structure for rainwater storage and penetration facilities and a water channel member, and is embedded in the ground,
The structure has an internal space extending in the longitudinal direction,
The water flow groove member is a half cylinder, and penetrates the internal space along the longitudinal direction.
The water permeable layer is provided around the assembly.
Rainwater storage and penetration facility. The rainwater storage and penetration facility according to claim 3, further comprising a plurality of assemblies for rainwater storage and penetration facilities,
The plurality of assemblies are continuously arranged in at least one of the longitudinal direction, the width direction, and the height direction.
Rainwater storage and penetration facility. An assembly for rainwater storage and penetration facilities, and a rainwater storage and penetration facility including a U-shaped groove,
The assembly includes a structure for rainwater storage and penetration facilities and a water channel member, and is embedded in the ground,
The structure has an internal space extending in the longitudinal direction,
The water flow groove member has a half-cylinder shape and penetrates the internal space along the longitudinal direction.
The U-shaped groove is disposed so that the open surface faces the bottom surface portion of the assembly, and extends along the longitudinal direction.
Rainwater storage and penetration facility. An assembly for a rainwater storage and penetration facility, and a rainwater storage and penetration facility including a rainwater tank,
The assembly includes a structure for rainwater storage and penetration facilities and a water channel member, and is embedded in the ground,
The structure has an internal space extending in the longitudinal direction,
The water flow groove member has a half-cylinder shape and penetrates the internal space along the longitudinal direction.
The rainwater trough has an internal space defined by a peripheral wall, and a first inflow / outflow hole penetrating the peripheral wall from the inside to the outside,
In the assembly, the water flow groove member is connected to the first inflow / outflow hole,
Rainwater storage and penetration facility. The rainwater storage and penetration facility according to claim 6, wherein the rainwater basin further includes a second inflow / outflow hole,
The second inflow / outflow hole penetrates the peripheral wall from the inside to the outside, and is disposed with a difference in elevation on the bottom surface side of the eaves from the first inflow / outflow hole, and the rainwater main pipe constituting the underground rainwater pipe network It is connected to the,
Rainwater storage and penetration facility.

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