JP2005179919A - Facility for storage and percolation of rainwater and the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a facility for storage and percolation of rainwater and the like , which enables the separation of a large stone, sand and the like without damage to a filling member, even on the occurrence of a rapid influent, which hardly accumulates sand, sludge and the like, which enables the sand, the sludge and the like to be efficiently collected by using the whole surface of the filling member, at a first flush immediately after a rainfall, and which facilitates maintenance. <P>SOLUTION: An outer peripheral edge of the filling member, which is arranged on the uppermost of a water storage tank, is formed as a continuous space; a distributing pipe with a wall surface, which is provided with a void for filtering out solid matter of a fixed size, included in the rain water, is arranged in the space; the rainwater and the like flow in via the distributing pipe; a permeable plate is arranged in the lower part of the distributing pipe; and a lid body is provided in the state of covering a top surface of the distributing pipe and that of the filling member. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a facility that is buried underground and stores and / or infiltrates rainwater, etc., and in particular, sand that flows in along with rainwater can be efficiently removed, and the water storage tank is filled with a filling member having a sand collecting function. It relates to facilities that store and / or infiltrate rainwater and the like.

    Conventionally, for example, in large-scale residential land development sites, adjustment ponds are created at intervals and scales commensurate with the development area. This adjustment pond, for example, digs up the ground about 1 m to form a reservoir for rainwater, etc., and connects this reservoir to drainage grooves from surrounding residential areas and road gutters. Temporary rainwater and the like are temporarily stored to prevent stagnation of rainwater in the surrounding residential area, flooding of rivers, outflow of sewage to rivers, and the like. In addition, there is a type that uses an infiltration type water storage tank in which the periphery of the water storage tank is formed of a permeable sheet so that rainwater is gradually infiltrated into the land. Thus, by forming the wall surface of the water tank with a waterproof sheet, or a water-permeable sheet, or by forming the lower part with a waterproof sheet and the upper part with a water-permeable sheet, a storage facility, a permeation facility, It functions as a storage and infiltration facility.

  As a storage and infiltration facility for this type of rainwater, etc., the tank part is constructed by digging the ground, and a plurality of container-like members are arranged vertically and horizontally and filled from the bottom to the vicinity of the ground line, and the top part is filled The coating means is provided. A storage and penetration facility for rainwater or the like is known in which a container-like member is constituted by a bottom portion having a large number of holes and a peripheral side plate and is tapered toward the bottom portion (see, for example, Patent Document 1).

  However, since the container-like member used is a plastic molded body, and the flow path of rainwater and the like is provided in a complicated manner, if rainwater or the like suddenly flows at a rapid speed in the early rainy season or heavy rainfall, etc. In addition, the plastic molded body may be damaged, or rainwater may not smoothly enter the storage tank due to running water resistance, and may flow backward.

  As a storage and penetration facility for rainwater and the like that suppresses the flow rate of inflowing rainwater, etc., a penetration that has many through-holes with a diameter of about 1 to 2 cm in the ceiling or inside of a tank that is buried underground and filled with a plastic molded body A tank characterized by arranging a pipe is known (for example, see Patent Document 2).

  In this tank, the top of the tank is the water-permeable surface, a groove is provided above it, a permeation pipe is passed through the groove, and rainwater or the like that permeates from the pipe passes through the water-permeable surface. The purpose of using the permeation tube is to reduce the speed of rainwater flowing into the tank at a high speed during rainfall to a relatively low speed, reduce the resistance caused by the plastic molding, and smoothly store rainwater etc. Is to do so.

However, in the method of Patent Document 2, stones or the like larger than the diameter of the through hole provided in the permeation pipe remain in the pipe without coming out of the permeation pipe, and small sand or sludge that passes through the through hole is rainwater. Since the inflow rate of the liquid becomes slow, it is easy to deposit in the plastic molded body, and the inside of the tank is filled with the plastic molded body arranged vertically and horizontally, and it is difficult to remove the accumulated sand and sludge. . For this reason, there is a problem that there is a concern that the function as a water storage tank is lost when the volume of the tank is gradually reduced to reduce the storage amount and the water storage amount becomes extremely small. In that case, it takes time and a large maintenance cost to dig up an existing water tank, clean it after removing the filling member, and re-install the filling member again. In addition, if necessary, a new storage and penetration facility will be created, which requires new land and hinders effective use of land.
Japanese Patent Publication No. 4-26648 JP 2002-242279 A

  The present invention has been made in view of such problems, and its main purpose is large stones and sand contained in rain water without damaging the filling member even if there is a sudden inflow of water. In addition, it is difficult for sand and sludge to accumulate on the filling member, and sand and sludge can be efficiently collected using the entire surface of the filling member during the first flush immediately after rainfall, and maintenance is easy. It was made for the purpose of providing storage and penetration facilities such as rainwater.

  The storage and infiltration facility for rainwater and the like according to claim 1 of the present invention (invention 1) stores and / or infiltrates rainwater or the like embedded in the underground and filled with a filling member having a sand collecting function. The facility is a space in which the outer peripheral edge of the filling member arranged at the uppermost stage of the water storage tank is a continuous space, and a space is provided in the space to filter out solid matter of a certain size contained in rainwater. A water distribution pipe having a wall surface is disposed, rainwater or the like flows through the water distribution pipe, a water permeable plate is disposed at the lower part of the water distribution pipe, and covers the upper surface of the water distribution pipe and the upper surface of the filling member. A body is provided.

  In the invention according to claim 2 (invention 2), the storage and penetration facility for rainwater or the like is substantially rectangular in plan view, a water receiving tank into which rainwater or the like flows is provided at one corner, and a sand settling tank is provided at the other three corners. The storage / penetration facility for rainwater or the like according to invention 1, wherein a space in which the water distribution pipe is disposed is provided along the outer periphery of the rectangle, and a sand settling tank is provided at a position where the space intersects. .

  According to a third aspect of the present invention (invention 3), the water distribution pipe is disposed in an outer periphery of the filling member arranged at the uppermost stage of the water storage tank and a space cut out linearly across the filling member. A storage and penetration facility for rainwater or the like according to any one of the inventions 1 and 2, wherein a sand sunk tank is provided at a position where the space intersects.

  Invention of Claim 4 (Invention 4) is provided with columns at regular intervals on the side surface of the space, and the columns protect the side surface of the water pipe. It is a storage and penetration facility for rainwater.

  The invention according to claim 5 (invention 5) is a storage and penetration facility for rainwater or the like according to any one of inventions 1 to 4, wherein the water distribution pipe is a perforated pipe.

  The invention according to claim 6 (invention 6) is a storage and penetration facility for rainwater or the like according to any one of inventions 1 to 5, wherein a mud draining device is incorporated in the sand settling tank.

    The storage and penetration facility such as rainwater to which the present invention is applied has an outflow suppression effect that temporarily stores rainwater or the like when heavy rain falls and prevents a river flow rate from rapidly increasing. And the rainwater etc. which were stored can also be utilized as watering for planting, water for car washing, water for emergency and water for fire prevention in an emergency.

  Its schematic structure is a water tank formed by digging the ground, horizontally arranged in the water tank, a large number of filling members stacked in the vertical direction, and the upper part of the water tank placed on the top of the filling member And a covering material for covering.

  The filling member is made of polyethylene, polypropylene, vinyl chloride, polyethylene terephthalate, or other plastics, or waste plastics, etc., covering the top of the water tank, vertical load of earth pressure, and horizontal by water pressure or side earth pressure It is composed of four columnar connecting parts that support the load and secure the space of the water storage tank, and an inclined plate part that is fixed to the four connecting parts and is inclined at an angle of about 5 degrees with respect to the horizontal plane. Is. These four pillars are also used for stacking filling members.

  The inclined plate portion is formed of a thick plate material having a thickness of about 4 to 5 mm, and constitutes guiding means for guiding inflow rainwater or the like in a predetermined direction. The inclined plate portion has an inclination direction that flows in the lower direction. When the inclination angle is gentle, sand or the like stays without flowing along with rainwater, and therefore an inclination angle of about 5 degrees is preferable. The size of the filling member is composed of a square inclined plate portion and connecting portions extending vertically at the four corners of the inclined plate portion. The connecting portion is formed of a triangular prism and has a rectangular parallelepiped shape as a whole.

  Rainwater containing relatively small-diameter earth and sand flows along the inclined plate of the filling member. Even if the flow of rainwater etc. is slow, the inclined plate has an appropriate inclination angle, so the sand etc. moves downward along the inclination and eventually collects and accumulates in the concave part at the bottom of the water storage tank To do. The accumulated sediment is periodically drained.

  In the present invention, the water distribution pipe has a nominal diameter of about 650 mm to 1000 mm. The wall surface of the water distribution pipe is not particularly limited as long as it is provided with a space that can filter solids such as stones with a diameter of 5 mm or more. For example, as an example, a perforated pipe for embedding in which a large number of through-holes and slits with a diameter of about 10 mmφ are provided in a hard vinyl chloride pipe, extruded wire materials such as polyethylene, polypropylene, and vinyl chloride resin are combined in a mesh shape to form a mesh. And the like are formed into tubes.

  The leaching of rainwater, etc. from the water distribution pipe should be leached in a uniform direction over the entire circumference of the pipe, but if it is leached only in a specific direction, the leaching direction is What is necessary is just to arrange | position so that it may face the filling member side.

  A water-permeable board is arranged under the water pipe. This plate is overlaid on the filling member below. Accordingly, the weight of the pipe is not directly applied to the filling member, but is distributed over the entire plate surface and applied to the filling member. Therefore, there is little possibility that a filling member will be damaged. The water-permeable plate may be a plate having a rigid structure such as a plastic perforated plate, an expanded metal plate, a honeycomb plate, or the like.

  A lid is provided so as to cover the upper surface of the water distribution pipe and the upper surface of the filling member, and a protective material is further laid thereon, so that earth and sand and the like are not mixed into the space and the filling member. The lid prevents the earth pressure from being dispersed and applied to the water distribution pipe and the filling member, and prevents the lid from being damaged by the protective material. The lid and the protective material may be water permeable or water impermeable. For example, the lid and the protective material may be water permeable, and rainwater or the like that has fallen on the upper part of the water storage tank may be directly stored in the water storage tank through the water permeable sheet and the cover body. Further, these members are not limited to the above-described configuration, and may be configured such that a concrete plate or the like is simply arranged on the upper portion of the filling member.

  The water distribution pipe is disposed in a continuous space constituted by cutting out the uppermost edge portion of the filling member disposed in the water storage tank from the water receiving tank of the facility. Therefore, it is not necessary to provide a separate groove or the like for housing this pipe. In addition, when the arrangement area of the filling member is large, the notched space is not only the peripheral edge, but also an optional space of the filling member arranged at the uppermost stage is notched to add space. Also, a water pipe may be provided. In this case, rainwater or the like flows well into the filling member in the vicinity of the central portion of the water storage tank, so that the use of the filling member is reduced and the overall sand collecting performance of the storage and penetration facility is improved.

  When the storage and infiltration facility for rainwater or the like is substantially rectangular in plan view, a water receiving tank is provided at one corner, a sand settling tank is provided at the other three corners, and a water distribution pipe is provided between the water receiving tank and the sand settling tank, and the sand settling tank and the sand settling tank. It is arrange | positioned in the notch space of the upper end edge part of the filling member in between. When the sand settling tank has a depth that reaches the bottom of the water storage tank, the amount that can be accumulated increases, so that a cleaning interval can be widened, and maintenance work can be reduced. A communication hole may be provided in the sand settling tank from the ground. If there is a communication hole, it is easy to perform daily inspections, confirmation of filling members, etc., and maintenance work becomes easy.

  Even in this case, when the arrangement area of the filling member is large, a space may be added by cutting out an arbitrary portion of the filling member arranged at the uppermost stage, and a water pipe may be arranged in this space. It is the same that a sand settling tank may be provided at a place where the water pipes meet and a communication hole may be provided in the sand settling tank. In addition, when the space | interval of sand-sink tanks is long, you may provide a sand-sink tank in the middle.

  If a mud draining device is provided in the sand settling tank, it is preferable to do so because mud draining is possible without requiring manual labor.

  The water distribution pipe is disposed in a space in which the filling member is notched. Pillars are provided on both sides of the space. The position where the column is provided is located above the side or corner of the filling member so that the load of the column is not directly applied to the inclined portion of the filling member. A water-permeable plate is provided at the bottom of this space to receive the load of the water distribution pipe, and a lid is provided at the top to distribute the load such as earth and sand to the water distribution pipe and the pillars on both sides of the space. Has been.

  Pillars are erected on both sides of the space, and the water pipes are placed between the pillars on both sides and protected by the pillars. Therefore, even if there is a sudden inflow of rainwater, etc. Since the column is prevented by the pillar, damage to the pipe, the filling member, the upper and lower water-permeable plates, and the like can be prevented.

  The pillar may be in the form of a single bar, or may be used by stacking blocks having a low height to a required height. In any case, as long as a concave portion and a convex portion that are engaged with each other are provided at the contact portion between the filling member and the filling member, the column can be provided simply by aligning the concave and convex portions. The same applies to the upper and lower joints between blocks having a low height.

  In the first aspect of the present invention, the water distribution pipe is disposed in the space where the filling member is cut out along the upper edge of the water storage tank, and the water distribution pipe separates the solid matter of a certain size contained in the rainwater. It is set as the water pipe which has the wall surface provided with. Therefore, there is no fear that the filling member will be damaged or clogged with large stones, etc., and rainwater containing small sand or sludge is discharged from the water distribution pipe evenly and at a relatively low speed. Even when the flow rate is low, the used filling member has sand collecting properties, so that rainwater or the like can be stored without clogging.

  Further, a water permeable plate is disposed at the lower part of the water distribution pipe so that the load of the water distribution pipe is not directly applied to the filling member located at the lower part, and the water permeable cover covers the upper surface of the water distribution pipe and the upper surface of the filling member. Since the body is provided and a water-permeable sheet is further laid on it to prevent dirt and sand from entering the space, the earth pressure on the water distribution pipe is reduced and the risk of the water distribution pipe being bent is reduced. In addition, extra soil or sand does not enter the filling member, and the amount of stored water is secured.

  In addition, since the facility outer side surface of the space is made of a water-impervious material, rainwater and the like flowing out from the distribution pipe is always guided to the side of the distribution pipe or in the direction of the filling member and flows into the land around the facility. Because there is no land pollution.

  In the invention 2, the storage and penetration facility for rainwater or the like has a substantially rectangular shape in plan view, a water receiving tank is provided at one corner thereof, and a sand basin tank is provided at the other three corners, and each is connected by the above water pipe. The large stones left in the pit are accumulated in the sand settling tank and the water pipes are not clogged. Accordingly, it is possible to smoothly disperse rainwater or the like having an abrupt amount of water and guide it to the filling member.

  In invention 3, since it is arrange | positioned also in the space notched across the filling member arrange | positioned at the upper part of a water tank other than the water distribution pipe arrange | positioned at the upper periphery edge part of a filling member, rainwater The water distribution such as can be further dispersed and smoothly flow into the filling member. Therefore, there is less possibility that the filling member will be damaged.

  In the invention 4, since the pillars are provided at regular intervals on the side surface of the space, and the pillars protect the side surface of the water distribution pipe, the water distribution pipe hardly vibrates at the time of sudden inflow of rainwater, and the facility may be damaged. Less.

  In the invention 5, since the water distribution pipe is a perforated pipe having many through holes in the pipe wall, the strength as a piping material is high and the shape of the through hole is circular, so that clogging due to sand or sludge is prevented. Less.

  In the invention 6, since the mud draining device is incorporated in the sand settling tank, it is possible to easily confirm the degree of accumulation of large stones accumulated in the sand settling tank and to easily remove it, and to check the filling member, etc. It becomes easy to do.

  Hereinafter, one embodiment of storage penetration facilities, such as rain water, concerning the present invention is described in detail based on a drawing. In the present embodiment, a storage facility that stores rainwater and the like will be described in detail. 1 is a cross-sectional view of an example of a storage facility such as rainwater according to the present embodiment, FIG. 2 is a plan view in which the covering member of FIG. 1 is omitted, FIG. 3 is a cross-sectional view taken along line AA in FIG. FIG. 5 is an upper perspective view of an example of a filling member used in the facility of FIG. 1, FIG. 6 is a lower perspective view of an example of the filling member used in the facility of FIG. 7 shows an example of a connecting member used in the facility of FIG. 1, FIG. 7 (a) is an upper perspective view, and FIG. 7 (b) is a lower perspective view.

  The storage and penetration facility for rainwater and the like to which the present invention is applied has an outflow suppression effect that temporarily stores rainwater and the like in FIGS. Is. And the stored rainwater etc. can be used as watering for planting, water for car washing, water for emergency use, water for fire prevention, water storage tank 10 formed by digging down the ground 1, and inside the water storage tank 10 Are arranged side by side in the horizontal direction, and include a large number of filling members 30 that are stacked in the vertical direction, and a covering member 40 that is placed on the top of the filling member 30 and covers the upper portion of the water storage tank 10.

  The water storage tank 10 is formed by digging the ground surface 1 into a rectangular shape with a depth of about 1 to 10 m, for example, to form an excavation portion 2, and laying and solidifying a crushed stone on the bottom surface to form a base portion 3. Yes. The bottom surface of the water storage tank 10 is basically a flat surface, and a concave portion 11 is formed in the central portion of the bottom surface in the long side direction. The recessed portion 11 is formed over the entire width in the short side direction of the bottom surface. A waterproof sheet 12 is laid on the bottom surface of the recessed portion 11 and the entire bottom surface of the water storage tank 10. As the waterproof sheet 12, a synthetic rubber, a resin sheet or an asphalt sheet having a thickness of 1.5 mm or more is used. A lattice-shaped frame 14 is fitted into the recessed portion 11 on the bottom surface of the water tank 10, and the entire bottom surface of the water tank 10 is substantially flat.

  A side surface of the water storage tank 10 is constituted by a wall material 20, and the outside is covered with a water-impervious sheet 21, and this is backfilled with a backfill layer 22. The wall material 20 is sufficient if the filling member 30 does not collapse. However, it is preferable that the wall member 20 has a strength capable of preventing the filling member 30 from being damaged due to earth pressure after backfilling. Further, it is not necessary for the wall surface to be a single plate, and a plurality of unit size plates may be combined to be regarded as a single plate. The material is not particularly limited as long as it is excellent in strength and corrosion resistance, and examples thereof include synthetic resin, fiber-reinforced synthetic resin, and concrete. The same applies to the water-impervious sheet 21.

  A large number of filling members 30 are horizontally arranged on the bottom surface of the water storage tank 10 that is substantially flat as described above, and are stacked one above the other. In the present embodiment, as shown in FIG. 2, the water storage tank 10 is connected in parallel by connecting 20 filling members 30 in front and rear, left and right, and in this state, seven filling members 30 are directly stacked. The pitch is made small, and the filling member 30 is stacked on top of each other with four stages and a connecting member 35 (described later) sandwiched between them to make a large pitch. The filling member 30 is filled in the water storage tank 10 to provide a storage space for rainwater and the like. In addition to securing, the upper covering member 40 is supported.

  As shown in FIG. 5, the filling member 30 is formed of plastic such as polyethylene, polypropylene, vinyl chloride, polyethylene terephthalate, waste plastic, or the like, and the vertical load of the covering member 40 that covers the upper part of the water tank 10, And four columnar connecting portions 31 that support a horizontal load due to water pressure and secure the space of the water storage tank 10, and an inclination that is fixed to the four connecting portions 31 and is inclined at an angle of about 5 degrees with respect to a horizontal plane. It is comprised from the board part 32. FIG.

  The inclined plate portion 32 is formed of a thick plate material having a thickness of about 4 to 5 mm, and constitutes guiding means for guiding the inflowing rainwater or the like in a predetermined direction. The inclination direction S of the inclined plate portion 32 is a direction in which the tip of the arrow is low, and when the inclination angle is moderate, sand or the like stays without flowing along with the rainwater, so that the inclination angle is about 5 degrees.

  In addition, the inclined plate portion 32 of the filling member 30 is usually configured by inclining a flat plate, but it may be a curved surface that is gently depressed along the inclined direction or gently bulged in a convex shape, and is small. A stepped inclined surface with continuous steps and a slope may be used. Furthermore, you may comprise the inclined surface which changes on the way from a steep slope to a gentle slope.

  The connecting portion 31 is formed of a thick plate material having a thickness of about 4 to 5 mm, and has a triangular pipe shape with a large cross section. The upper and lower ends of the triangular pipes are concave and convex fitting parts so that the opposing faces of the triangular pipes corresponding to each other are stacked. In addition, a through hole 31a is provided in the fitting portion so that rainwater and air can be circulated, and a guide hole 31b for guiding sand or the like flowing into the triangular pipe to the inclined plate portion is formed. By changing the height of the connecting portion 31, the interval between the inclined plate portions 32 when the filling members 30 are stacked can be changed.

  A reinforcing portion is formed on the lower surface of the inclined plate portion 32, and the upper surface is a flat and gentle inclined surface. As shown in FIG. 6, lattice-shaped reinforcing ribs 33 that are vertically and horizontally integrated at predetermined intervals are formed as reinforcing portions. The reinforcing ribs 33 are formed so that the vertical width of the central portion of the inclined plate portion 32 is large and the vertical width gradually decreases toward the periphery. With this configuration, even when a load is applied to the upper surface of the inclined plate portion 32, the deformation of the inclined plate portion 32 is reduced, and it is possible to prevent damage such as cracks from occurring even if the installer is placed on the upper surface. The reinforcing ribs do not have to be in a lattice shape, but a lattice shape is preferable because the strength is higher than that in one direction, and a hexagonal honeycomb lattice shape is more preferable in terms of strength.

  When the span of the filling member 30 in the vertical direction is large, a triangular pipe-shaped connecting member 35 that fits into the connecting portion 31 may be used. As shown in FIG. 7, the connecting structure 37 of the connecting member 35 in the vertical direction has the same fitting structure as that of the connecting part, and includes a horizontal joining part 38 on the vertical surface 36 that is orthogonal to the outside. ing. The joining portion 38 is provided with joining concave portions 38b or convex portions 38a which are fitted to each other, and are joined by these. Further, the connecting member 35 is provided with an inclined partition plate for guiding earth and sand to the inclined plate portion 32, and a through hole 39 is formed at a lower position of the partition plate so that rainwater can enter and air can be discharged. It has become.

  In the present invention, the outer peripheral edge portion of the filling member 30 arranged at the uppermost stage is cut out to form a continuous and elongated space that houses a water pipe having a function of filtering sand and the like in drainage. . This space is connected around the water storage tank 10, and when the water storage tank 10 has a large plane area, as shown in FIG. There is also.

  The water storage tank 10 is connected to a water conduit 25 from a side groove or the like that collects rainwater or the like that has fallen in the vicinity. A mud reservoir 26 is installed in the middle of the water conduit 25, and sand and mud in rainwater are precipitated, and the supernatant water is introduced into the water storage tank 10 by the water conduit 25. A plurality of water conduits 25 extend from the mud reservoir 26 and pass through the wall material 20 and the waterproof sheet 21 of the water storage tank 10 and are guided to the water receiving tank 15, and a water distribution pipe 24 is connected to the water receiving tank 15. .

  Since the space provided in the pipe wall of the water distribution pipe 24 only needs to have a function of allowing relatively small-diameter sand and sludge contained in the rainwater to pass therethrough, the gap is usually formed in an opening shape of about 1 mm to 5 mm. The porosity is usually about 2.5 to 5%, although it depends on the material of the water distribution pipe 24. The shape of the opening is preferably a structure having a self-cleaning function. For example, a shape in which a long hole having a major axis of about 30 mm to 50 mm and a minor axis of about 5 mm is opened along the longitudinal direction of the tube, etc. Is mentioned.

  At three corners of the water storage tank 10 other than the water receiving tank 15, sand settling tanks 15A, 15B, and 15C penetrating the water storage tank 10 in the vertical direction are provided, and the elongated space 16 is connected thereto. The sand sunk tanks 15A, 15B, and 15C penetrating in the vertical direction are also provided at locations where the long and narrow spaces 16 across the opposite sides correspond to the sides. This space 16 is provided with a communication hole (not shown) with the ground, and inspects the sand settling tanks 15A, 15B, 15C and the filling member 30 from the ground surface, and accumulates in the sand settling tanks 15A, 15B, 15C. It is easy to remove earth and sand. Note that the water receiving tank 15 may also penetrate the water storage tank 10 in the vertical direction.

  The water distribution pipe 24 is disposed in the elongated space 16 connecting the sand settling tanks 15A, 15B, and 15C. A hard perforated plate 17 is laid on the filling member 30 below the space 16. The perforated plate 17 is a plate having a gap that allows sand and sludge contained therein together with rain water to pass therethrough, and has a void such as a punching metal plate, an expanded metal plate, a mesh plate, and a honeycomb plate and is bent. Any plate having high rigidity may be used. The material is preferably excellent in corrosion resistance, for example, plastics such as vinyl chloride resin, polyethylene, polypropylene, polyethylene terephthalate, resins such as waste plastics, fiber reinforced composite resins, stainless steel, Examples include anticorrosion aluminum and anticorrosion iron. Since the load of the water distribution pipe is transmitted downward via the perforated plate 17, the load is uniformly applied to the filling member 30 over a wide area, and the filling member 30 is partially crooked or damaged. It is prevented.

  An upper portion of the space 16 is covered with a covering board (lid body) 41. The lid 41 is disposed so as to cover not only the upper part of the space but also the upper part of the filler 30, and is a part of the covering member 40. The cover body 41 is covered with a waterproof sheet 42 to cover the upper surface of the water storage tank. If necessary, a protective board 44 or the like is placed thereon, and the cover 41 is covered with a backfill layer 43. Since the lid 41 has a fitting portion that fits with the connecting portion 31 or the connecting member 35 on the upper portion of the filling member 30, it can be stably placed on the filling member 30.

  On both side surfaces of the space 16 between the lower perforated plate 17 and the upper lid body 41, pillars 18 are erected at intervals. Therefore, the water distribution pipe 24 is not directly in contact with the side surface of the space 16, but is disposed with its side surface partially supported by the column 18. Therefore, even if the water distribution pipe 24 vibrates due to an abrupt water flow caused by rainfall, damage to the filling member 30 and the like is reduced.

  The interval between the columns 18 is such that when the columns 18 are normally positioned on the connecting portion 31 of the filling member 3, the filling member 30 is less likely to be damaged due to buckling or the like even if earth pressure is applied. It is desirable that Each of the pillars 18 is provided with a concave and convex fitting shape so that it can be fitted and connected to the perforated plate 17, and each of the pillars 18 has a concave and convex shape so that the upper end part can be fitted and connected to the lid 41. A mating type is provided. Therefore, it is convenient that this fitting shape is the same as the fitting shape of the connecting portion 31 or the connecting member 35.

  The pillar 18 may be used so that a block body having a unit length is vertically combined to form a pillar shape having a required length. Also at this time, the upper and lower end portions of each block may be provided with an uneven fitting shape so that they can be fitted to each other.

  Rainwater and the like flowing out from the pipe wall of the water distribution pipe 24 flows from between the pillars 18 to the perforated plate 17 side below the space 16 and the side filling member 30 side, and sand and the like are removed by the inclined plate portion 32. The water tank 10 is filled while being allowed to settle. Immediately after the rain, a rapid amount of rainwater flows in to increase the flow velocity, so that sand or the like previously deposited on the inclined plate 32 moves downward rapidly. Therefore, the inclined plate 32 is washed each time it rains, and the risk of clogging and the like is reduced. As described above, the sand or the like deposited on the inclined plate portion 32 moves downward along the inclined plate 32, is finally accumulated in the recessed portion 11, and is discharged by a pump or the like as necessary.

  As described above, the storage unit 10 can store rainwater and the like by the waterproof sheet 12 on the bottom surface and the waterproof sheet 21 on the side surface, and by the waterproof sheets 12 and 21 and the waterproof sheet 42 of the covering member 40 on the upper surface. An internal space is constructed. Then, the backfill layer 43 of the covering member 40 is backfilled in the same plane as the ground 1. In addition, the waterproof sheet 42 on the upper part of the storage unit 10 is formed of a water permeable sheet, and rainwater that has fallen on the upper part of the storage unit 10 is directly passed through the backfill layer 43, the water permeable sheet, and the covering board (lid body) 41 to the storage unit 10. You may make it store. Further, the covering member 40 is not limited to the above-described configuration, and may be a configuration in which a concrete plate or the like is simply arranged on the top of the filling member 30.

  An overflow pipe 27 projects from the upper part of the water storage tank 10, and an orifice pipe 28 projects from the lower part of the water storage tank 10. The overflow pipe 27 is discharged from the upper part when the water storage tank 10 becomes nearly full. The orifice pipe 28 gradually drains rainwater stored in the water storage tank 10, and the amount of the outflow can be adjusted by adjusting the diameter of the orifice. When rainwater collected in the water storage tank 10 is used, the rainwater in the water storage tank 10 can be pumped up and used as water for watering plants or water for car washing.

It is sectional drawing of one Embodiment of the facility which stores and / or osmose | permeates rainwater etc. which concern on this invention. It is the top view which abbreviate | omitted the covering member of FIG. It is the sectional view on the AA line of FIG. It is an expanded sectional view of the space part of FIG. It is an upper perspective view of an example of the filling member used for the facility of FIG. It is a lower perspective view of an example of the filling member used for the facility of FIG. An example of the connection member used for the facility of FIG. 1 is shown, (a) is an upper perspective view, and (b) is a lower perspective view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 2 Excavation part 3 Base part 10,10A Water storage tank 11 Recessed recessed part 12 Waterproof sheet 14 Frame 15 Receiving tank 15A, 15B, 15C Sand settling tank 16 Space 17 Perforated plate 18 Column 20 Wall material 21 Waterproof sheet 24 Water distribution pipe 25 Water guide pipe 26 Mud reservoir 27 Overflow pipe 28 Orifice pipe 30 Filling member 31 Connecting part 31a Through hole 31b Guide hole 32 Inclined plate part 33 Reinforcing rib 34 Opening part 35 Connecting member 38 Joining part 38a Joining convex part 38b Joining recessed part 40 Covering member 41 Covering board (lid)
42 Tarpaulin 43 Backfill layer 44 Protection board S Inclination direction

Claims (6)

  A facility for storing and / or infiltrating rainwater, etc., embedded in the underground with a filling member having a sand collecting function filled in the reservoir, and the outer peripheral edge of the filling member arranged at the uppermost stage of the reservoir The space is a continuous space, and in this space, a water distribution pipe having a wall surface provided with a space for separating solid matter of a certain size contained in the rainwater is disposed, and the rainwater and the like are disposed through the water distribution pipe. A storage and permeation facility for rainwater or the like, wherein a water-permeable plate is disposed below the water distribution pipe, and a lid is provided to cover the upper surface of the water distribution pipe and the upper surface of the filling member.   The storage and penetration facility for rainwater and the like is substantially rectangular in a plan view, a water receiving tank into which rainwater and the like flows is provided at one corner, a sand settling tank is provided at the other three corners, and a space where a water pipe is provided is rectangular. A storage and infiltration facility for rainwater or the like according to claim 1, wherein a sand settling tank is provided at a position where the space intersects the outer periphery.   The water distribution pipe is disposed in a space cut out linearly across the outer periphery of the filling member disposed at the uppermost stage of the water storage tank and the filling member, and a sand settling tank is provided at a position where the space intersects. The storage and penetration facility for rainwater or the like according to any one of claims 1 and 2.   The storage and infiltration facility for rainwater and the like according to any one of claims 1 to 3, wherein pillars are provided at regular intervals on the side surfaces of the space, and the pillars protect the side surfaces of the water pipes.   The storage and permeation facility for rainwater and the like according to any one of claims 1 to 4, wherein the water distribution pipe is a perforated pipe. 6. A storage and penetration facility for rainwater or the like according to any one of claims 1 to 5, wherein a mud draining device is incorporated in the sand settling tank.

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