JP4336247B2 - Rainwater infiltration facility - Google Patents

Description

  The present invention temporarily stores rainwater that has increased due to concentrated torrential rain, etc., and gently infiltrates it into the surrounding ground and discharges it, thereby reducing the concentration of rainwater on drainage facilities and rivers and moisturizing the earth. It relates to rainwater infiltration facilities.

  In recent years, in urban areas, so-called impervious areas where the ground is covered with buildings and asphalt pavement and rainwater does not soak into the ground directly, rainwater that has increased due to torrential rain, etc., is concentrated in drainage facilities and rivers at once, There is a risk of flood damage. Therefore, in the event of heavy rain, a rainwater infiltration facility has been developed that gently infiltrates rainwater into the surrounding soil (soil) in order to alleviate the concentration of rainwater in drainage facilities and rivers and to moisten the ground. ing.

  This type of rainwater infiltration facility is formed by laminating and combining a recess formed by digging down the ground and a filling member made of a spiral waved water storage pipe made of a synthetic resin such as polyethylene. An inside filling laminate disposed in the recess, and a water-permeable sheet disposed on the bottom wall and side wall of the recess so as to cover the inside filling laminate. There has been proposed a method in which rainwater temporarily stored in a filling laminate is gently permeated into the ground through a water-permeable sheet and discharged (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2002-88828 (paragraph numbers 0029 to 0030 in the detailed description of the invention, FIG. 9)

  In this rainwater infiltration facility, after digging the ground to form a recess, the entire surface of the inner wall of the bottom wall of the recess is overlaid with a plurality of water-permeable sheets partially overlapping in the width direction and length direction. After being arranged on the inner surface of the permeation facility so as to rise above the height of the permeation facility, the water-permeable sheet is bonded by heat-sealing the overlapping portions in the width direction and the length direction of these water-permeable sheets with a portable gas burner, From the gaps between the partially overlapping portions of these sheets, the surrounding ground sand, gravel, earth and sand, mud, crushed stones and other foreign matters are prevented from entering the inside packing laminate. However, the work of laminating a water permeable sheet is difficult, requiring labor and skill, and often requires a specialist, and the work of laminating a water permeable sheet is expensive, which increases the construction cost of a rainwater infiltration facility. There is a problem. In addition, there is a problem that foreign substances are likely to enter the inside-packed laminate, and the performance (rainwater penetration capacity) of the rainwater penetration facility is reduced.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to eliminate the need for attaching a water permeable sheet to the bottom wall of the recess and the inner surface of the side wall at the construction site. An object of the present invention is to provide a rainwater infiltration facility capable of improving the performance, reducing the construction cost, and maintaining the performance stably over a long period of time.

  In order to achieve the above-mentioned object, the invention described in claim 1 of the present invention is formed by laminating and combining a recess formed by digging the ground and a plurality of filling members. In the rainwater infiltration facility, wherein the rainwater infiltration facility is configured to gently infiltrate and discharge the rainwater temporarily stored in the recess-filling laminate in the ground. A plurality of filling members on the side adjacent to the recess are formed of a water-permeable material, and foreign matter intrusion prevention packing is interposed at the joint of these filling members.

  In the invention described in claim 2 of the present invention, the recess formed by digging the ground and a plurality of filling members are stacked and united, and the filling is provided in the recess. A rainwater infiltration facility that gently infiltrates and discharges rainwater temporarily stored in the inside of the inside of the concave filling, and on the side adjacent to the concave in the inside of the inside stack A plurality of filling members consist of a non-permeable member, a plurality of rainwater insertion holes provided in the member, and a water permeable sheet adhered to the side surface of the member, and prevent foreign matter from entering the seams of the filling members A packing is interposed.

  According to a third aspect of the present invention, there is provided a filling portion formed by laminating and combining a recess formed by digging down the ground and a plurality of filling members, and disposed in the recess. A rainwater infiltration facility that gently infiltrates and discharges rainwater temporarily stored in the inside of the inside of the concave filling, and on the side adjacent to the concave in the inside of the inside stack A plurality of filling members are formed of a water-impermeable material, and a water-permeable foreign matter intrusion-preventing packing is interposed at the joint between the filling members, and the bottom wall and side walls of the recess and the filling laminate A crushed stone layer is disposed between them.

  The invention described in claim 4 of the present invention is characterized in that, in the rainwater infiltration facility described in claim 3, a water-permeable sheet is disposed in place of the crushed stone layer.

  The invention described in claim 5 of the present invention is the rainwater infiltration facility according to any one of claims 1 to 4, wherein the filling member is a plurality of floor panels and ceiling panels laid in a lateral direction. A plurality of side panels stacked in the vertical direction; a plurality of beam members interposed between the side panels; and a column spacer interposed between the floor panel, the beam member, and the ceiling panel, Laminate laminates beam material and ceiling panel on floor panel via pillar spacers at predetermined intervals in the vertical direction, and attaches upper and lower ends of side panel to floor panel and ceiling panel, floor panel, ceiling It is formed by combining a panel and a side panel in a frame shape, and the foreign matter intrusion prevention packing is at least a floor panel adjacent to the recess, between the side panels, and between the side panels and the beam members. Intervened It is characterized in.

  According to the rainwater infiltration facility according to claim 1 of the present invention, the plurality of filling members on the side adjacent to the recess in the filling layered body itself are formed of a water-permeable material. Temporarily stored rainwater can be permeated through the filling member and slowly permeated into the surrounding ground to be discharged. Further, since the foreign matter intrusion prevention packing is interposed at the joint of the filling member, it is possible to prevent the surrounding ground sand, gravel and other foreign matters from entering the filling laminate. This eliminates the need to install the water-permeable sheet on the bottom wall and the inner surface of the side wall of the recess and the work to attach the water-permeable sheet at the construction site. In addition to improving the performance, the construction period can be shortened and the construction cost can be reduced. Furthermore, the performance (rainwater penetration capacity) of the rainwater penetration facility can be stably maintained over a long period of time.

  According to the rainwater infiltration facility according to claim 2 of the present invention, a water permeable sheet is attached in advance to the non-permeable member of the plurality of filling members on the side adjacent to the recess in the laminated body for filling, and the permeable sheet. Since it has the function of dispersing and penetrating rainwater into the ground, there is no need to install a water permeable sheet on the bottom wall and side wall of the recess at the construction site, and sand, gravel, etc. in the foreign matter intrusion prevention packing Because it has a function to prevent foreign matter from entering, there is no need to attach a water-permeable sheet at the construction site, making the construction work easier and improving workability, shortening the work period, and reducing construction costs. . In addition, the performance of the rainwater infiltration facility can be stably maintained over a long period of time. Furthermore, since the filling member has a function of allowing the rainwater to slowly permeate into the ground with a water-permeable sheet that is usually thinner and smaller in volume than the water-impermeable member, the material cost of the laminate for filling is reduced. The cost of the infiltration facility can be reduced.

  According to the rainwater infiltration facility according to claim 3 of the present invention, since the crushed stone layer has a function of dispersing and infiltrating rainwater into the ground, the permeable sheet is disposed on the bottom wall of the recess and the inner surface of the side wall at the construction site. In addition to eliminating the need for work, the foreign matter intrusion prevention packing has a function to prevent intrusion of sand, gravel and other foreign matters, so there is no need to attach a water permeable sheet at the construction site, making the work easier and improving workability. In addition, the construction period can be shortened and the construction cost can be reduced. In addition, the performance of the rainwater infiltration facility can be stably maintained over a long period of time. Furthermore, since the filling member constituting the filling laminate is formed of a non-permeable material, the processing cost and material cost of the filling laminate are reduced, and the cost of the rainwater infiltration facility is further reduced. Can do.

  According to the rainwater infiltration facility according to claim 4 of the present invention, the water permeable sheet disposed on the inner surface of the recess has a function of dispersing and penetrating rainwater into the ground, so the water permeable sheet is disposed at the construction site. Although it is necessary, since the foreign matter intrusion prevention packing has a function of preventing intrusion of sand, gravel and other foreign matters, it is not necessary to attach a water permeable sheet requiring man-hours and skill at the construction site. Therefore, the construction work can be similarly simplified and the construction workability can be improved, the work period can be shortened, and the construction cost can be reduced. In addition, the performance of the rainwater infiltration facility can be stably maintained over a long period of time. Furthermore, since the filling member constituting the filling laminate is formed of a non-permeable material, the processing cost and material cost of the filling laminate are reduced, and the cost of the rainwater infiltration facility is further reduced. Can do.

  According to the rainwater infiltration facility according to the fifth aspect of the present invention, the laminated body for filling is combined by combining the filling members having a floor panel, a ceiling panel, a side panel, a beam member, and a column spacer in a frame shape. Since it is formed, the structure of the filling body is simple and robust, and the reliability of the rainwater infiltration facility can be further increased.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an embodiment of a rainwater infiltration facility according to the present invention, FIG. 2 is an enlarged perspective view showing a part of a laminated body for filling in a rainwater infiltration facility in FIG. 1, and FIG. FIG. 4 shows a floor panel and a side panel of a filling member constituting the laminated member in FIG. 2, (a) is a front view, (b) is a side view, and FIG. 4 is a seam of the filling member in FIG. 2. Fig. 3 shows three examples of a state in which a foreign matter intrusion prevention packing is interposed between the floor panels and the side panels, and (a) is an enlarged view showing a state in which the foreign matter intrusion prevention packing is interposed between the floor panels and between the side panels. ) Is an enlarged view showing a state in which a foreign matter intrusion prevention packing is interposed at the joint between the side panel and the beam member, and (c) is a state in which a foreign matter intrusion prevention packing is interposed in the joint between the floor panel and the side panel. FIG. 5 is an enlarged view showing a foreign matter intrusion prevention pad interposed in the seam of the filling member in FIG. Kin is a perspective view showing a.

  As shown in FIG. 1, the rainwater infiltration facility of the present embodiment is formed by digging the ground surface 1 to a size that can temporarily store a desired amount of rainwater, for example, a rectangular hole-shaped recess 3, And a filling layered body 5 disposed in the recess 3, and the rainwater temporarily stored in the filling layer 5 for filling the recess 3 is gently permeated into the surrounding ground and discharged. It is configured to be able to.

  As shown in FIGS. 1 and 2, the middle filling laminate 5 is formed by laminating and combining a plurality of middle filling members. The filling member includes a plurality of rectangular plate-like floor panels 7 and a ceiling panel 9 laid in the horizontal direction (XY axis direction), and a plurality of rectangular plate-like side panels stacked in the vertical direction (Z-axis direction). 11, a plurality of beam members 13 having a square cross section interposed between the side panels 11, and a column spacer 15 having a circular cross section interposed between the floor panel 7, the beam member 13, and the ceiling panel 9. Have. Then, a plurality of beam members 13 and a plurality of ceiling panels 9 are laminated on the plurality of floor panels 7 with a predetermined interval in the vertical direction via a plurality of support spacers 15, and bolts, screws, adhesives, heat fusion It is attached by fitting, uneven fitting, etc., and the upper and lower ends of the side panel 11 are attached to the floor panel 7 and the ceiling panel 9, and the filling members such as the floor panel 7, the ceiling panel 9, and the side panel 11 are combined in a frame shape Formed by combining them.

  By the way, the stacking laminate 5 is formed by stacking and combining a plurality of small filling stacking units (not shown) in which the filling members such as the floor panel 7 and the ceiling panel 9 are combined in a frame shape. You may make it form. This is preferable because it can quickly cope with rainwater infiltration facilities of various sizes and capacities, and can be easily assembled on the construction site. In addition, when forming the said inside-packing laminated body unit, the floor panel 7, the ceiling panel 9, and the side panel 11 of the laminated body unit which is not adjacent to the said recess 3 can freely circulate rainwater between laminated units. Thus, it is preferable to use a filling member having a lattice shape, a perforated shape, or the like, since a decrease in the rainwater occupation volume of the filling layered product 5 can be suppressed.

  When the filling laminate 5 is formed by combining the filling members having the floor panel 7, the ceiling panel 9, the side panel 11, the beam members 13, and the support spacers 15 into a frame shape, This is preferable because the structure of the filling member is simple and robust, and the reliability of the rainwater infiltration facility can be further improved.

  A plurality of filling members on the side adjacent to the recess 3 in the filling laminate 5, i.e., the floor panel 7 and the side panel 11, are made of polypropylene or the like as shown in FIGS. It is composed of thermoplastic resin, thermosetting resin such as epoxy, or cement, etc. mixed with sand, coal ash (fly ash generated from coal-fired power plants, etc.), aggregates such as glass, and water as necessary. It is formed by molding a water-permeable material (water permeability K is preferably 0.1 cm / sec or more) such as water-permeable concrete, water-permeable resin, expanded polystyrene, or other open-cell foamed resin.

  In addition, the floor panel 7, the side panel 11, the ceiling panel 9, and the beam members 13 and the column spacers 15 which are filling members on the side not adjacent to the recess 3 may be formed of the water-permeable material, Or a non-water-permeable material, for example, a thermoplastic resin such as polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyethylene terephthalate (PET), ABS resin, or an appropriate amount of glass fiber or coal ash mixed therein. You may form with things. Use of these water-permeable materials and non-water-permeable members mixed with coal ash reduces material costs and enables effective use of industrial waste, as well as being lightweight and excellent in moldability. This is preferable because there is little deformation and rigidity is increased.

  Further, a straight line between the floor panels 7 and the side panels 11 which are a plurality of filling members on the side adjacent to the recess 3 in the laminated body 5 for the filling (including not only contact but also proximity, the same applies hereinafter). Mold seam 17 (see FIG. 4A), T-shaped seam 19 between side panel 11 and beam 13 (see FIG. 4B), L-shaped seam 21 between floor panel 7 and side panel 11 (See FIG. 4 (c)), in order to prevent intrusion of underground sand, gravel, earth and sand, mud, crushed stones and other foreign substances from the joints 17, 19, and 21 into the filling laminate 5. For example, a foreign substance intrusion prevention packing 23 having a circular cross section as shown in FIG. 5 is interposed.

  More specifically, as shown in FIGS. 2 and 4 (a), the linear seam 17 has semicircular recesses on both end faces of the opposing floor panel 7 and both end faces of the side panel 11, respectively. A groove 18 is formed along the direction of the seam 17, and a foreign matter intrusion prevention packing 23 is inserted and interposed in the concave groove 18. Further, as shown in FIGS. 2 and 4B, the T-shaped seam 19 is engaged with the T-shaped end portions 14 of the beam members 13 interposed between the opposite end surfaces of the side panel 11 facing each other. The groove 18 is formed along both ends of the side panel 11 and both ends of the T-shaped end portion 14 of the beam member 13 along the direction of the seam 19. Inserted and inserted. Further, in the L-shaped seam 21, as shown in FIG. 2 and FIG. 4C, the concave grooves 18 are formed along the direction of the seam 21 on both end surfaces of the floor panel 7 and the side panel 11 facing each other. Then, a foreign matter intrusion prevention packing 23 is inserted and interposed in the concave groove 18. It is desirable to insert and interpose the foreign matter intrusion prevention packing 23 when the packing members such as the floor panel 7, the ceiling panel 9, and the side panel 11 are combined in a frame shape. When the L-shaped corners (corner portions) of the floor panel 7 and the side panel 11 are integrally formed, there is no seam 21 and no foreign matter intrusion prevention packing 23 is required.

  The foreign matter intrusion prevention packing 23 may be non-permeable (waterproof) as long as it has a function of preventing sand, gravel, earth and sand, mud, crushed stone, and other foreign matters from entering the inside packing laminate. It may be water permeable. For example, rubber molded bodies with elasticity such as chloroprene, neoprene, butyl rubber, etc., formed by processing water-permeable nonwoven fabrics such as closed or open cell polystyrene (PS), polyethylene, polypropylene, polyurethane and other foamed moldings, geotextiles, etc. You may have done. In addition to the circular shape, the cross-sectional shape of the packing 23 may be an elliptical shape, a cross-sectional angle shape, a flat plate shape, or the like. Further, the packing 23 may be interposed by being directly fixed with an adhesive or the like without being inserted into the concave groove 18 of the joints 17, 19, and 21.

  In the rainwater infiltration facility of the present embodiment, as shown in FIG. 1, a rainwater inflow auxiliary tank 25 is further disposed outside one side of the recess 3, and the connection pipe 27 is disposed in the recess 3. The side panel 11 of the filling laminate 5 is connected in communication. Rainwater is drawn in from the rainwater inflow pipe 29 and flows into the inside filling laminate 5 through the rainwater inflow auxiliary tank 25 and the connecting pipe 27. Then, the muddy sand contained in the rainwater sinks and is removed in the rainwater inflow auxiliary tank 25 to prevent the muddy sand from entering the middle-packed laminate 5 as much as possible. I try not to deposit. A drain pipe 31 is connected to the lower part of the rainwater inflow auxiliary tank 25, and in the unlikely event that rainwater is filled in the filling layer 5 for rainwater penetration facilities, a valve (not shown) provided in the drain pipe 31 is not shown. ) And a part of rainwater is discharged into rivers, groundwater, drainage facilities, etc. After rainwater that has flowed into the inside filling laminate 5 is temporarily stored, it passes through the floor panel 7 and the side panel 11 that are a plurality of filling members on the side adjacent to the recess 3 in the inside filling laminate 5. Then it slowly penetrates into the ground and is discharged. In addition, protective layers, such as soil, gravel, asphalt, and a concrete block, are provided in the upper part of the ceiling panel 9 of the laminated body 5 for filling, and the opening part of the recess 3 is closed. In addition, 33 is an inspection manhole for investigating the state of the inside of the filling laminated body 5.

  The rainwater infiltration facility of the present embodiment is configured as described above. In the case of assembling this rainwater infiltration facility, as shown in FIG. 1, the ground 3 is dug down to a size that can temporarily store a desired amount of rainwater to form a recess 3, and a predetermined provided on the bottom wall thereof. On the sand layer having a thickness, filling members 5 such as the floor panel 7 and the ceiling panel 9 are combined in a frame shape, and the filling laminate 5 incorporating the water shielding means 7 is disposed. When the middle-filled laminate 5 is small, it may be formed in advance in a factory or the like, transported to a construction site, and disposed in the recess 3 at the construction site. When the filling body 5 is medium or large, a plurality of small filling body units previously formed in a factory or the like are transported to the construction site, and these laminate units are laminated and combined at the construction site. Therefore, it is preferable to dispose in the recess 3. In addition, the laminated body 5 for filling may be formed by combining the filling members such as the floor panel 7 and the ceiling panel 9 together in a frame shape at the construction site regardless of the size. Of course. In this way, after the filling layered product 5 is disposed in the recess 3, the gap between the periphery of the filling product 5 and the side wall of the recess 3 is covered with inclusions such as soil, gravel, and a protective plate. The filling and filling laminated body 5 is disposed in the recess 3. Moreover, the rainwater inflow auxiliary tank 25 and other incidental devices are arranged in the filling laminate 5 and the like, and a protective layer such as soil, gravel, asphalt, concrete block is provided on the top panel 9 of the filling laminate 5. The assembly of the rainwater infiltration facility is completed by closing the opening of the recess 3.

  According to the rainwater infiltration facility of the present embodiment, the floor panel 7 and the side panel 11 that are a plurality of filling members on the side adjacent to the recess 3 in the filling body 5 are formed of a water-permeable material. The rainwater temporarily stored in the filling laminate 5 can be permeated through the floor panel 7 and the side panel 11 and slowly permeated into the surrounding ground to be discharged. Further, since foreign matter intrusion prevention packings 23 are interposed at least between the floor panels 7 on the side adjacent to the recess 3, between the side panels 11, and between the side panels 11 and the beam members 13, The surrounding underground sand, gravel and other foreign matters can be prevented from entering the laminated body 5 for use. This eliminates the need to install the water-permeable sheet on the bottom wall and the inner surface of the side wall of the recess 3 and the work of attaching the water-permeable sheet at the construction site, making the construction work simple, eliminating the need for man-hours and skill. Workability can be improved, construction period can be shortened, and construction cost can be reduced. Furthermore, the performance (rainwater penetration capacity) of the rainwater penetration facility can be stably maintained over a long period of time.

  Further, as shown in FIG. 2, the filling member includes a plurality of floor panels 7 and a ceiling panel 9 laid in the horizontal direction, a plurality of side panels 11 stacked in the vertical direction, and a side panel 11. A plurality of beam members 13 to be mounted, and a column spacer 15 interposed between the floor panel 7, the beam member 13, and the ceiling panel 9, and the filling stack 5 is a beam member on the floor panel 7. 13 and the ceiling panel 9 are stacked at predetermined intervals in the vertical direction via the support spacers 15, and the upper and lower ends of the side panel 11 are attached to the floor panel 7 and the ceiling panel 9. When the side panel 11 is formed by combining and combining in a frame shape, the structure of the stacked body 5 for packing is simple and robust, and the reliability of the rainwater infiltration facility can be further increased.

  6 (a) to 6 (d), a floor panel 36 and a side panel 37 of a plurality of filling members constituting the filling laminate 35 in an embodiment different from that shown in FIGS. 1 to 4 are shown. It is shown.

  The floor panel 36 and the side panel 37 of this embodiment are the filling members on the side adjacent to the recess 3 in the filling laminate 35, like the floor panel 7 and the side panel 11, and are rectangular plates. Adhesive, heat-sealing, etc. on the outer surface (surface) facing the bottom wall or the side wall of the recess 39 of the member 39 and the plurality of rainwater insertion holes 41 provided in the member 39 It consists of the water-permeable sheet 43 stuck by. Further, semicircular grooves 18 are formed along the direction of the seam 17 on both end surfaces of the floor panel 36 and the side panels 37 facing each other at the seam 17. 23 is inserted and inserted. Further, the groove 18 is formed along the direction of the seam 19 on both end surfaces of the side panel 37 and the both end surfaces of the T-shaped end portion 14 of the beam member 13 at the seam 19, and foreign matter intrusion prevention is provided to the concave groove 18. The packing 23 is inserted and inserted. Furthermore, the groove 18 is formed along the direction of the seam 21 at both end surfaces of the floor panel 36 and the side panel 37 facing each other at the seam 21, and a foreign matter intrusion prevention packing 23 is inserted into the groove 18. The

  The water-impermeable member 39 constituting the floor panel 36 and the side panel 37 is, for example, a thermoplastic resin such as polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyethylene terephthalate (PET), ABS resin, or glass fiber or It is formed with a suitable amount of coal ash mixed, or with a closed cell foamed resin. It is preferable that the rainwater insertion holes 41 have a small inner diameter within a range that does not lower the mechanical strength of the floor panel 36 and the side panel 37 to an unacceptable level, and are distributed so as to be evenly distributed throughout.

  As the water permeable sheet 43, for example, a polyester long fiber nonwoven fabric, an open-cell foamed resin sheet, or the like is used. The rain water temporarily stored in the filling laminate 35 reaches the water permeable sheet 43 through the rain water insertion holes 41 of the floor panel 36 and the side panel 37, and is evenly distributed in the surface direction by the water permeable sheet 43. It slowly penetrates into and is discharged. The water permeable sheet 43 may be attached to the inner side surface (rear surface) of the water-impermeable member 39, or both the inner and outer side surfaces. It is difficult for foreign matter such as sand and gravel to accumulate therein, and the flow of rainwater hardly stays in the rainwater insertion hole 41. Therefore, it is preferable because rainwater can be stably permeated into the ground for a long period of time. Other configurations are substantially the same as those described in FIGS.

  According to the embodiment shown in FIG. 6, the water permeable sheet 43 is provided in advance on the non-permeable member 39 of the floor panel 36 and the side panel 37 which are a plurality of filling members on the side adjacent to the recess 3 in the filling laminate 35. Is attached and has the function of dispersing and penetrating rainwater into the ground by the water-permeable sheet 43, so that the work of disposing the water-permeable sheet on the bottom wall and the inner surface of the side wall of the recess 3 is unnecessary at the construction site. Since the foreign matter intrusion prevention packing 23 has a function of preventing intrusion of sand, gravel and other foreign matters, the work of attaching a water permeable sheet at the construction site is also unnecessary. Therefore, the construction work for constructing the rainwater infiltration facility is simple and requires no man-hours and skill, so that the construction workability can be improved, the construction period can be shortened, and the construction cost can be reduced. Moreover, the performance (rainwater penetration capability) of the rainwater penetration facility can be stably maintained over a long period of time. Further, since the floor panel 36 and the side panel 37 of the filling member are normally thinner than the non-permeable member 39 and have a small volume, the permeable sheet 43 has a function of allowing rainwater to slowly permeate into the ground. The material cost of the laminated body 35 is reduced, and the cost of the rainwater infiltration facility can be reduced.

  7A and 7B, in an embodiment different from the above-described two embodiments, a T-shape between the side panel 47 and the beam member 13 which are a plurality of filling members constituting the filling body 45 for filling. The seam 19 is provided with a foreign matter intrusion prevention packing 49 for preventing underground sand, gravel and other foreign matter from entering the filling stack 45, and the side wall of the recess 3 and the filling stack 45. The state where the crushed stone layer 51 is arrange | positioned between is shown.

  The side panel 47 is a filling member on the side adjacent to the recess 3 in the filling laminate 45 and is made of a water-impermeable material. As the water-impermeable material, the same material as that forming the water-impermeable member 39 is used. The foreign matter intrusion prevention packing 49 is made of a water permeable material, for example, open cell polystyrene (PS), polyethylene, polypropylene, polyurethane, other foamed moldings, water permeable nonwoven fabric such as geotextile, etc. according to the thickness of the side panel 47. It is processed into a flat strip having a width, and is inserted along a seam direction in a T-shaped seam 19 between both end faces of the side panel 11 and both end faces of the T-shaped end portion 14 of the beam member 13. It is allowed to pass through, but the foreign matter is not allowed to pass through. The packing 49 is fixed to the opposing side panel 47 or the T-type end 14 side of the beam 13 with an adhesive or the like so that the foreign matter intrusion prevention packing 49 is not displaced, deformed, or detached from the joint 19. Alternatively, a concave groove (not shown) having a size corresponding to the packing 49 is formed on both end surfaces of the side panel 47 and the T-shaped end portion 14 facing the seam 19 and inserted into the concave groove. In this case, it is preferable that the foreign matter intrusion prevention packing 49 is less likely to be displaced from the joint 19. Further, as shown in FIG. 7A, rainwater temporarily stored in the filling laminate 45 is placed between the side wall of the recess 3 and the side panel 47 of the filling laminate 45 in the surrounding ground. A crushed stone layer (including sand and gravel layers) 51 that disperses and infiltrates is disposed.

  Although not shown, the floor panel, which is a filling member on the side adjacent to the recess 3, is also formed of a water-impermeable material in the same manner as the side panel 47. In addition, a straight joint between the floor panels and between the side panels 47 which are a plurality of filling members on the side adjacent to the recess 3 in the stacked body 5 for the filling, and if necessary, the floor panel and the side panel 47. A foreign matter intrusion prevention packing 49 is also interposed between the L-shaped joints. Furthermore, a crushed stone layer 51 is also arranged between the bottom wall of the recess 3 and the floor panel of the filling laminate 45. Other configurations are substantially the same as those described in FIGS.

  According to the embodiment shown in FIG. 7, the crushed stone layer 51 has a function of dispersing and penetrating rainwater into the ground, so that it is not necessary to dispose a water-permeable sheet on the bottom wall and the inner surface of the side wall of the recess 3 at the construction site. In addition, since the foreign matter intrusion prevention packing 49 has a function of preventing sand, gravel and other foreign matter from entering, there is no need to attach a water permeable sheet at the construction site, and the construction work is easy and improves workability. The construction period can be shortened and the construction cost can be reduced. In addition, the performance of the rainwater infiltration facility can be stably maintained over a long period of time. Furthermore, since the side panel 47 and the floor panel of the filling member constituting the filling layer 45 are made of a non-permeable material, the processing cost and material cost of the filling layer 45 are reduced, and rainwater The cost of the infiltration facility can be further reduced.

  FIGS. 8A and 8B show a T-shape between the side panel 47 and the beam member 13 which are a plurality of filling members constituting the filling laminated body 45 in an embodiment different from the third embodiment. The seam 19 is provided with a foreign matter intrusion prevention packing 49 for preventing underground sand, gravel and other foreign matter from entering the filling stack 45, and the side wall of the recess 3 and the filling stack 45. A state in which a water-permeable sheet 53 is disposed between the side panel 47 and the side panel 47 is shown. In this embodiment, a water-permeable sheet 53 is provided in place of the crushed stone layer 51 of the embodiment shown in FIG. The water permeable sheet 53 is made of the same material as the water permeable sheet 43, that is, a polyester long fiber nonwoven fabric, an open-cell foamed resin sheet, or the like. Although not shown, the water permeable sheet 53 is also disposed between the bottom wall of the recess 3 and the bottom wall of the stacking laminate 45. Other configurations are substantially the same as those of the embodiment shown in FIG.

  According to the embodiment shown in FIG. 8, the water permeable sheet 53 disposed on the inner surface of the recess 3 has a function of dispersing and penetrating rainwater into the ground, and the foreign matter intrusion prevention packing 49 is intruded with sand, gravel and other foreign matters. Since the prevention function is provided, the work of bonding the water-permeable sheet requiring man-hours and skill at the construction site becomes unnecessary. Therefore, the construction work can be similarly simplified and the construction workability can be improved, the work period can be shortened, and the construction cost can be reduced. In addition, the performance of the rainwater infiltration facility can be stably maintained over a long period of time. Furthermore, since the side panel 47 and the floor panel of the filling member constituting the filling layer 45 are made of a non-permeable material, the processing cost and material cost of the filling layer 45 are reduced, and rainwater The cost of the infiltration facility can be further reduced.

It is sectional drawing which shows one Embodiment of the rainwater penetration | infiltration facility which concerns on this invention. It is a perspective view which expands and shows a part of laminated body for filling in the rainwater penetration facility in FIG. The floor panel and side panel of the member for filling which comprises the laminated body for filling in FIG. 2 are shown, (a) is a front view, (b) is a side view. FIG. 3 shows three examples of a state in which foreign matter intrusion prevention packing is interposed at the seam of the filling member in FIG. 2, and (a) shows that foreign matter intrusion prevention packing is interposed between the floor panels and between the side panels. (B) is an enlarged view showing a state in which a foreign matter intrusion prevention packing is interposed at the joint between the side panel and the beam member, and (c) is a foreign matter intrusion at the joint between the floor panel and the side panel. It is an enlarged view which shows the state in which the prevention packing was interposed. FIG. 3 is a perspective view showing a foreign matter intrusion prevention packing interposed between seams of the filling member in FIG. 2. FIGS. 5A and 5B show a floor panel and a side panel of a plurality of filling members constituting a laminated body for filling different embodiments from those shown in FIGS. 1 to 4, wherein FIG. (C) is a rear view, (d) is a sectional view taken along line XX of (a). (A) A foreign matter intrusion-preventing packing is interposed at a joint between a side panel, which is a plurality of filling members, and a beam member constituting the filling laminate in an embodiment different from the above-described two embodiments. The schematic diagram which shows the state by which the crushed stone layer was arrange | positioned between the side wall of this, and the laminated body for filling, (b) is a YY arrow directional cross-sectional view of (a). (A) It replaces with the crushed stone layer in FIG. 7, the schematic diagram which shows the state by which the water-permeable sheet | seat was arrange | positioned, (b) is ZZ arrow sectional drawing of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 3 Recess 5, 35, 45 Filling laminated body 7, 36 Floor panel 9 Ceiling panel 11, 37, 47 Side panel 13 Beam material 14 T-type edge part 15 Column spacer 17 Seam 18 Groove 19 Seam 21 Seam 23, 49 Foreign matter intrusion prevention packing 25 Rainwater inflow auxiliary tank 27 Connection pipe 29 Rainwater inflow pipe 31 Drain pipe 33 Inspection hole 39 Non-permeable member 41 Rain water insertion hole 43, 53 Water permeable sheet 51 Crushed stone layer

Claims (5)

  A recess formed by digging the ground and a stacking member formed by laminating and combining a plurality of filling members and disposed in the recess, In a rainwater infiltration facility that slowly infiltrates rainwater temporarily stored in the body into the ground and discharges it, a plurality of filling members on the side adjacent to the recesses in the filling laminate are formed of a water permeable material. The rainwater infiltration facility is characterized in that a foreign matter intrusion prevention packing is interposed at the seam between the filling members.   A recess formed by digging the ground and a stacking member formed by laminating and combining a plurality of filling members and disposed in the recess, In a rainwater infiltration facility that gently infiltrates rainwater temporarily stored in the body into the ground and discharges it, a plurality of filling members on the side adjacent to the recess in the filling layered body are non-permeable members and the A rainwater permeation comprising a plurality of rainwater insertion holes provided in a member and a water-permeable sheet adhered to a side surface of the member, and a foreign matter intrusion prevention packing interposed between seams of the filling members Facilities.   A recess formed by digging the ground and a stacking member formed by laminating and combining a plurality of filling members and disposed in the recess, In a rainwater infiltration facility that gently infiltrates rainwater temporarily stored in the body into the ground and discharges it, a plurality of filling members on the side adjacent to the recesses in the filling laminate are formed of a non-permeable material In addition, a water-permeable foreign matter intrusion-preventing packing is interposed at the joint of these filling members, and a crushed stone layer is disposed between the bottom wall and side walls of the recess and the filling laminate. Rainwater infiltration facility.   The rainwater infiltration facility according to claim 3, wherein a water permeable sheet is disposed in place of the crushed stone layer.   The filling member is a plurality of floor panels and ceiling panels laid in the horizontal direction, a plurality of side panels stacked in the vertical direction, a plurality of beam members interposed in the side panels, a floor panel, a beam And a column spacer interposed between the material and the ceiling panel, and the stacking laminate is configured to layer the beam material and the ceiling panel on the floor panel with a predetermined interval in the vertical direction via the column spacer. The upper and lower ends of the side panel are attached to the floor panel and the ceiling panel, and the floor panel, the ceiling panel and the side panel are combined in a frame shape, and the foreign matter intrusion prevention packing is adjacent to the recess. 5. The rainwater infiltration facility according to claim 1, wherein the rainwater infiltration facility is interposed between at least the floor panels, between the side panels, and between the side panels and the beam members.

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