JP2008248479A - Rainwater storage permeating facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To add the function for easily constructing a facility of an optional scale, easy in maintenance-management such as an inside inspection and cleaning in operation after construction, and preventing the deterioration in the initial function caused by sedimentation of sediment. <P>SOLUTION: In this rainwater storage permeating facility, a plurality of kinds of panels 1 having a specific width (w) and different in the length L are used, and a plane square hollow columnar basin unit 2 is assembled by these panels 1. These basin units 2 are vertically-horizontally arranged at an interval. These basin units 2 are mutually fixed and a rainwater storage space is formed in the ground. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rainwater storage and infiltration facility that collects and temporarily stores rainwater that has fallen on a pavement surface during raining, and gradually infiltrates it into the ground. Relating to storage and infiltration facilities.

  The facility that treats rainwater has been the main method of construction, which is an open-flow flow control pond. However, the establishment of a regulating pond is a dead space from the viewpoint of effective use on the ground, so in recent years the main focus has been on trench-type construction facilities that are mainly used for infiltration and underground type regulating pond facilities that are mainly used for storage. Has migrated. These include those that completely store rainwater and those that partially penetrate. In any case, the above-ground part can effectively use the land for a green space or a parking lot.

  Furthermore, the mainstream of rainwater treatment facilities has shifted from a structure using a concrete frame and a concrete secondary product to a structure made of a plastic molded product. Processing facilities made of plastic molded products have different heights, but the vertical, horizontal, and height are connected to each other by a block body or an assembly structure of about 0.5m to 1.0m square block bodies and components. Therefore, it is a planned scale rainwater storage and infiltration facility.

  However, the inside of the rainwater storage and penetration facility has no space for visual inspection in the facility because members constituting the facility are densely packed. For this reason, normal internal functions cannot be inspected from the inspection port and inspection rod for inspecting the inside of the facility, and it is difficult to perform appropriate maintenance management to maintain the initial functions. The biggest problem is the structure that cannot be maintained and inspected inside the facility.

  In addition, rainwater that flows into the rainwater storage and infiltration facilities is discharged from various structures such as parking lots, green areas, surface drainage, roofs of buildings, and U-shaped drainage. Contains pollutants such as sand and small gravel. In particular, when it rains in a concentrated manner, a large amount of pollutants flow into the facility, and every time it rains, the pollutants and the like accumulate in the facility, and the initial function decreases with time. In recent construction methods, there is no effective construction method regarding the discharge of human and mechanical contaminants and the like, and the cleaning of facilities, etc., which is a problem in the structure and structure of rainwater storage and penetration facilities.

JP 2006-37482 A JP 2005-133376 A JP-A-2005-54403 JP 2005-16084 A JP-A-7-166595

  In view of the above-mentioned problems in the conventional rainwater storage and penetration facility, the present invention can easily construct a facility of any scale, and is easy to maintain and manage such as internal inspection and cleaning during operation after construction, Furthermore, it aims at providing the rainwater storage penetration facility which can also add the function which can prevent the deterioration of the initial function accompanying sedimentation of earth and sand.

  In the present invention, in order to achieve the above-mentioned object, plane rectangular hollow columnar ridge units 2 assembled by panels 1 are arranged at intervals in the vertical and horizontal directions, and these ridge units 2 are fixed to each other, A space for storing rainwater is formed. Thereby, the ease of maintenance and management is obtained together with the ease of construction.

  In other words, the rainwater storage and infiltration facility according to the present invention uses a plurality of types of panels 1 having a constant width w and different lengths L, and assembles the flat square hollow column-shaped eaves units 2 with the panels 1. In addition to arranging them vertically and horizontally, these dredging units 2 are fixed to each other, and a space for storing rainwater is formed in the ground.

  In the rainwater storage and infiltration facility according to the present invention, the flat rectangular hollow column-shaped ridge unit 2 can be assembled by a plurality of types of panels 1 having a constant width w and different lengths L, so that a plurality of types of modules having different dimensions are modularized. By aligning the panels 1, it is possible to easily assemble the flat rectangular hollow column-shaped scissors unit 2 having different depths. And, since such dredging units 2 are arranged at intervals in the vertical and horizontal directions and fixed together to constitute the facility, it is possible to construct a rainwater storage and infiltration facility of any scale with different vertical and horizontal dimensions on the plane. .

  Furthermore, since the rainwater storage and penetration facility is constructed by arranging the dredging units 2 at intervals in the vertical and horizontal directions, a space is formed between the dredging units 2 and between the dredging units 2 so that a large volume of rainwater can be stored. In addition, the inspection, management, and maintenance of visually inspecting the inside of the facility and removing sediment such as earth and sand accumulated therein become easy.

  A filter 11 in which slits 15 are provided radially from the center of a hollow hemispherical body 14 can be attached to the above-described saddle unit 2 on the panel 1 that constructs the same. As a result, it is possible to prevent coarse dust from entering the interior of the basket unit 2 or the space between them. Then, during maintenance and cleaning, it is possible to take out such coarse dust together with the filter 11.

  A rectifying bottom plate 21 having a rainwater guide surface 22 having a waveform on the upper surface and a gradient set in a direction orthogonal to the wavelength direction of the waveform can be provided at the bottom of the dredge unit 2. This rectifying bottom plate 21 can regulate the flow of rainwater at the bottom of the dredge unit 2. Then, the rain water discharge hole 6 is formed in the panel 1 on the lowest side of the gradient of the rain water guide surface 22 of the rectifying bottom plate 21 so as to correspond to the corrugated groove portion, thereby flowing in a certain direction at the bottom of the dredge unit 2. It becomes possible for the rainwater that has been adjusted to be drained from the dredge unit 2 in a certain direction. Thereby, the earth and sand etc. which are volume in the bottom part of the dredge unit 2 can be discharged effectively.

  As described above, in the rainwater storage and infiltration facility according to the present invention, it is possible to easily construct a rainwater storage and infiltration facility of any scale having different depths and plane dimensions by merely arranging a plurality of types of modularized panels 1. I can do it. Furthermore, in addition to a large storage capacity for rainwater, a rainwater storage and penetration facility that can be easily managed, inspected and maintained by visually inspecting the inside of the facility and removing sediment such as sediment accumulated inside the facility is constructed. I can do it.

In the present invention, a rainwater storage and infiltration facility is constructed by arranging flat rectangular hollow columnar ridge units 2 assembled by panels 1 at intervals in the vertical and horizontal directions. This makes it possible to easily construct a rainwater storage and penetration facility of any scale, and further facilitate maintenance and management during operation after construction.
Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

  In rainwater storage and infiltration facilities for commercial, residential land and other land development, especially rectangular storage and infiltration facilities, for example, rectangular rainwater storage and infiltration facilities with a scale of about 10m to 80m in width, especially about 4m wide and within about 200m in length. In this case, as shown in FIG. 1, several types of regular panels 1 having the same width w, for example, w = 600 mm and different lengths L are used. Four panels 1 having the required length L are used according to the height of rainwater storage and penetration, and as shown in FIG. Assemble the cocoon unit 2.

As shown in FIG. 3, these heel units 2 are individually installed in the vertical direction and the horizontal direction according to the plane dimensions of the facility with a certain fixed interval, and the upper plane of the adjacent heel unit 2 is set to the panel 1. Are fixed to each other with bolts, and the panels 1 are fixed to each other with bolts or clips to form a slab. The side surface of the space between the outer heel unit 2 is connected by the panel 1 according to the scale by integrating the heel unit 2 and the panel 1. As a result, a rainwater storage and penetration facility is constructed.
Hereinafter, embodiments of the present invention will be described more specifically.

  The panel 1 shown in FIG. 1 is a panel-like member made of, for example, a plastic molded body that is assembled into a module for assembling the basket units 2 and fixing the basket units 2 to each other. Inside, it is molded in a state where reinforcing reinforcing bars are arranged. For example, it has a structure in which a strip-like frame having a width of 70 mm is provided on the outer periphery of one plane of the panel 1 and reinforcing bars that intersect with each other in a straight line vertically and horizontally are arranged inside the frame.

  As shown in FIG. 1, the width w of this panel 1 is 600 mm, and the thickness t is 70 mm. The length L of the panel 1 is basically based on four sizes of 900 mm, 1200 mm, 1500 mm, and 1800 mm. However, depending on the depth of the rainwater storage and penetration facility, for example, as shown in FIG. 2, a panel 1 having a length L1 = 900 mm and L2 = 1200 mm is connected and a plurality of sheets such as a length L = L1 + L2 = 2100 mm, etc. These panels 1 can be used in combination in the longitudinal direction.

  As shown in FIG. 3, the scissor unit 2 uses the panel 1 and is assembled into a flat rectangular hollow column shape. That is, the eaves unit 2 combines four regular panels 1 having the same length, and connects and fixes the panels 1 with bolts to form a flat rectangular box-shaped hollow column. FIG. 3 is an example in which four panels are used to assemble the flat rectangular hollow columnar ridge unit 2 having a width w = 600 mm, a depth w + 2t = 740 mm, and a height h. When the panels 1 are used one by one, the height h of the heel unit 2 is equal to the length L of the use panel 1 and h = L. On the other hand, for example, as shown in FIG. 2, when two panels 1 having heights L1 and L2 are connected, the height h of the bag unit 2 shown in FIG. 3 is h = L1 + L2.

  In order to construct a rainwater storage and penetration facility using the dredge unit 2 assembled in this way, first, the ground is excavated according to the scale of the rainwater storage and penetration facility, and as shown in FIGS. A crushed stone or crushed stone is laid on the bottom of the ground and rolled, the pressure-resistant ground layer 3 is constructed, and concrete is placed on the pressure-resistant ground layer 3 to provide the foundation bottom base 4. The hollow columnar trough unit 2 is installed vertically on the foundation bottom board 4.

  For example, as shown in FIG. 4, when constructing a flat square rainwater storage and penetration facility, dredging units 2 are installed at equal intervals of d3 = 600 mm in the lateral direction of the rainwater storage and penetration facility, depending on the scale of the facility. Install the required number alone. In the longitudinal direction of the rainwater storage and penetration facility, the interval between the first row of ridge units 2 and the last row of ridge units 2 is set to d1 = 390 mm, and the interval between the ridge units 2 between them is d2 = 460 mm. Set up the same number of units according to the scale of the facility. Since the horizontal interval between the dredging units 2 is d1 = 600 mm, the panel 1 having the same height as the dredging unit 2 and having a width w = 600 mm is fitted into the portion and fixed with bolts. A lateral side wall. In the longitudinal direction of the rainwater storage and infiltration facility, since the interval between the dredging units 2 is d1 = 390 mm and d2 = 460 mm, the panel 1 having the same height is applied to the outside across the dredging panel 1 adjacent in the vertical direction. This is fixed with bolts to form the vertical side wall of the rainwater storage and penetration facility. The soot unit 2 constructed and installed in this way is independent while maintaining a certain space in the horizontal direction and the vertical direction.

  Further, as shown in FIGS. 5 to 8, the upper surface of the basket unit 2 is laid out with a fixed panel 1 and fixed to form a slab structure. The panels 1 are all laid in the horizontal direction on the top surface of the eaves unit 2, but each one of the horizontal start end side and the end end side uses a 1500 mm fixed panel, and between the start end side and the end end side, All use the panel 1 of 1200 mm. The panel 1 is fixed to the heel unit 2 with bolts, and the panel 1 laid on the upper surface of the heel unit 2 is configured such that adjacent ones are fixed with bolts and clips etc. on the long side and short side to constitute a slab, Establish a rainwater storage and penetration facility with a space inside. On the top surface of this rainwater storage and penetration facility, a necessary number of inspection ports for checking, managing and maintaining the inside function and situation are installed according to the scale of the facility.

  By constructing a rainwater storage and infiltration facility by installing the dredge unit 2 alone and connecting and fixing the dredge unit 2 and the outside with the panel 1 to form an integrated rainwater storage and infiltration facility, There are only two. The scissors unit 2 is a flat rectangular hollow columnar shape, and a space is provided between the scissors units 2. For this reason, the inspection, management, and maintenance for the situation judgment inside a facility can be performed easily.

  For example, in the inside of the square rainwater storage and infiltration facility described above, the intervals between the eaves unit 2 and the eaves unit 2 are all set at equal intervals of 600 mm from the start end row to the end row in the horizontal direction. All linear spaces with a width of 600 mm are formed. On the other hand, the distance between the first row and the second row from the start side in the vertical direction and the distance between the row unit 2 and the row unit 2 between the first row and the second row from the end side are set at an interval of 390 mm. Since the distance between the eyelid unit 2 and the eyelid unit 2 after the eyes is set at an equal interval of 460 mm, a linear space with a width of 390 mm is formed between the eyelid unit 2 and the eyelid unit 2 in the lateral direction. All the spaces between the heel unit 2 and the heel unit 2 in the second and subsequent rows from the start end side and the end end side are linear spaces having a width of 460 mm. In a square ridge, the horizontal space and the vertical space intersect each other in a straight line, so that all the space intersections form a cross shape.

In the case of rectangular rainwater storage and infiltration facilities, the vertical and horizontal numbers of the dredging units 2 are different, but the horizontal space is 600 mm, and the vertical space is 390 mm and 460 mm. Same as rainwater storage and penetration facility.
Because of such a structural structure and space formation inside the facility, it is possible to manually inspect and manage the functional status entering the facility from the inspection and management fences. In addition, since all the positions where the spaces intersect form a cruciform space, from all the positions that form the cruciform space, it is possible to visually check the functional status of front and rear and left and right, as well as mechanical remote control Internal inspection and management by means of is also possible.

  Even when it is judged that soil particles or pollutants accumulate inside the facility due to proper maintenance and management, this will cause problems in the rainwater treatment function. The structure and structure that facilitates the maintenance and management of the rainwater storage and infiltration facility, which can be extremely clean, can solve the problems of the prior art.

  Rainwater storage and infiltration facilities are classified into small-scale development, medium-scale development, and large-scale development according to the residential land and commercial area to be developed. In addition, there is administrative guidance from the Ministry of Land, Infrastructure, Transport and Tourism according to the rainfall intensity related to the rainfall and weather conditions in the development area. 1/5 (heavy rain once every 5 years), 1/10 (heavy rain once every 10 years), 1/30 (heavy rain once every 30 years), 1/50 (heavy rain once every 50 years), 1 / 100 (heavy rain once every 100 years) and the like.

  In the case of the planned scale of storage and infiltration facilities calculated assuming rainfall intensity / h of 1/50 (heavy rain once every 50 years), 1/5 (heavy rain once every 5 years) and 1/10 (once every 10 years) Even in the case of heavy rain of heavy rain), rainwater containing soil particles and other pollutants flows into the facility scale and the entire facility corresponding to 1/50, and soil contained in rainwater Particles and other pollutants also settle and deposit throughout the facility. For this reason, inefficient inspection and management are required, and maintenance costs are high.

  From such a viewpoint, in the large-scale development, the height of the foundation base 4 is set at any place and part where rainwater flows in the planned scale in which the planned scale of the rainwater storage and infiltration facility corresponding to 1/50 is set. A structure format in which facilities that can accommodate 1/5 or 1/10 of different structural structures and a facility of a planned scale with a two-stage structure is appropriate. FIG. 9 shows an example of the structure of such a two-stage rainwater storage and penetration facility. For the dredge unit 2 that is installed on the foundation floor 4 that is deeper than the other part of the foundation floor 4 in some parts of the rainwater storage and penetration facility, two or more panels 1 are added up and down. To correspond to the difference in depth with other parts.

  For example, in the case where the rainwater flowing into the rainwater storage and infiltration facility having a two-stage structure as shown in FIG. Can be processed in the facility. The same applies to the case of heavy rain once every 10 years. Alternatively, in the case of rainfall that is higher than the rainfall intensity, sediment is deposited in a facility where soil particles and other contaminants with high specific gravity are attached. In this way, the rainwater storage and infiltration facility has a two-stage structure with different processing capacity or different bottom plate heights, so that sedimentation and sedimentation of soil water and other pollutants is performed. Maintenance work related to the discharge and cleaning of materials can usually maintain the initial function by intensively inspecting and managing certain parts and locations, and the overall maintenance cost of rainwater storage and infiltration facilities can be reduced. It can be greatly reduced. The structure of the rainwater storage and infiltration facility having such a two-stage structure can solve the problems of the conventional construction method.

  A filter can be attached to the panel 1 that forms the flat square hollow columnar ridge unit 2. The inside of the box-shaped dredging unit 2 formed of four fixed panels, since all the dredging units 2 are hollow, by introducing rainwater into the dredging unit 2 and into the hollow, It becomes a structure that can greatly increase the amount of storage. When rainwater is introduced inside the dredging unit 2, a structure in which a necessary number of plastic filters are attached to prevent inflow of soil particles and other pollutants contained in the rainwater.

  For example, FIGS. 10 and 11 show a hollow hemispherical filter 11 with slits 15 provided with slits 15. In the structure of the filter 11, a cylindrical portion 13 is connected to a base portion of a hemispherical hollow hemispherical body 14, and a flange 12 is provided around an end portion of the cylindrical portion 13. Further, four claw-shaped stoppers 16 are provided at 90 ° intervals in the circumferential direction on the hollow hemispherical body 14 side of the cylindrical portion 13. The stopper 16 is tapered on the surface facing the hollow hemispherical body 14 such that the thickness gradually decreases from the base to the tip. The distance between the flange 12 and the stopper 16 corresponds to the thickness of the panel 1.

  The semispherical hollow hemispherical body 14 is provided with slits 15 that are radially open at equal intervals in the circumferential direction of the spherical surface from the vicinity of the apex to the vicinity of the cylindrical portion 13. The slit 15 has a hemispherical shape, and has a shape in which the vicinity of the apex is narrowed and the width gradually increases toward the cylindrical portion 13. The space between the slits 15 is provided in the radial direction and the circumferential direction of the hollow hemispherical body 14, and is surrounded by a strip-shaped rib-like connecting portion 17 that is continuous. The outer diameter of the cylindrical portion 13 is about 30 mmφ to 50 mmφ. The flange 12 of the filter 11 may have a disk shape as shown in FIG. 10 or may have a square shape as shown in FIG. The flange 12 is provided only on the outer periphery of the cylindrical portion 13, and the inside thereof is a hole having the same diameter as the inner diameter of the cylindrical portion 13.

  As shown in FIG. 12 (a), a required number of holes 5 corresponding to the outer shape of the filter 11 are provided in the panel 1 constituting the heel unit 2, and the hollow hemispherical shape of the filter 11 from the inside or the outside of the heel unit 2 Insert the 14 side into the hole 5 in the panel 1 and tap the brim 12 side lightly with a mallet. Then, the stopper 16 enters the hole 5 by the taper, and when it completely enters, the stopper 16 returns to the original shape as shown in FIG. In this state, since the panel 1 is sandwiched between the stopper 16 and the flange 12 of the filter 11, it can be easily attached. In this state, the filter 11 is fixed and does not come off.

  For conventional filters related to rainwater storage and infiltration facilities, stainless steel mesh filters are often attached to the inflow pipe and outflow pipe. However, especially in the case of heavy rain, the stainless mesh filter imposes flow velocity resistance. In addition, there are problems in the function and maintenance such as suspended pollutants stuck to the filter and hindering the smooth flow of rainwater.

  On the other hand, when the filter 11 having the slit structure is compared with the circular area of the inlet through which rainwater flows into the cavity of the dredge unit 2 and the spherical space area of the entire slit, the spherical space area of the entire slit is It is set to about 1.5 times. Alternatively, since the width of the slit 15 of the filter 11 is widened in the inflow direction with respect to the direction in which the rainwater flows into the cavity of the dredging unit 2, the flow rate resistance is not generated in the filter 11, so that the rainwater can be stored smoothly. I can do it. Further, the structure in which the filter 11 is attached to the panel 1 in the function and maintenance without the inflow of soil particles or other contaminants or the suspended contaminants sticking around the filter 11 is a problem of the conventional method. Can be eliminated.

Such a rainwater storage and infiltration facility has a rainwater guide surface having a rectangular shape at the bottom of the flat rectangular hollow column-shaped ridge unit 2 and having a wave shape inside thereof and a gradient formed in a direction perpendicular to the wavelength direction of the waveform. A rectifying bottom for drainage and sludge discharge may be installed. FIG. 13 shows such a rectifying bottom board 21.
Regardless of the facility shape, the facility scale, and the height of the dredging unit 2 of the facility, the dredging unit 2 constituting the rainwater storage and penetration facility has a common inner dimension of, for example, a square shape of 460 mm × 600 mm. In the case of this example, the rectifying bottom plate 21 for discharging sludge is formed of a planar rectangular resin shaped body having an outer dimension of 460 mm × 600 mm or less and a height of about 200 mm, and the upper surface has a wavelength of about 100 mm and a maximum height difference. A rainwater guide surface 22 having a three-waveform of about 50 mm and having a gradient of about 100 mm in height with respect to the width 600 mm of the straightening bottom plate 21 in a direction orthogonal to the wavelength direction of the waveform is formed. 13 (a) and 13 (b), a two-dot chain line represents the waveform of the rainwater guide surface 22, and arrows in FIGS. 13 (a) to 13 (b) indicate the gradient directions.

  This rectification bottom board 21 is installed in the bottom part of the eaves unit 2 assembled by the panel 1 as shown in FIG. Then, a sludge discharge port 6 of about 50 mmφ is opened at a position corresponding to the corrugated bottom of the rainwater guide surface 22 on the wall portion of the panel 1 of the dredge unit 2 having the lower rainwater guide surface 22. Although not shown, a short pipe is inserted into the sludge discharge port 6 and the aforementioned filter is attached to the tip thereof. The short tube or filter shall be removable. Since the rectifying bottom plate 21 is a resin-shaped body, it has a low specific gravity and may float. Therefore, it floats about 7 cm wide horizontally from the bottom to any two sides of the long side and the short side. A prevention plate 23 is attached, and this portion is sandwiched under the panel 1 forming the bag unit 2.

  Heavy rain that occurs once every five years or heavy rain that occurs temporarily every ten years, such as thunderstorms and typhoons, is often used for surface drainage in other areas such as parking lots and green areas, roofs of buildings, and U-shaped grooves. Various soils and other pollutants are turbidized and flow into rainwater storage and infiltration facilities. The turbidized rainwater in the facility gradually settles from a material with a high specific gravity, and fine particles with a relatively light specific gravity finally settle and accumulate in the facility except for suspended solids. The turbid rainwater flows into the hollow portion of the dredging unit 2 and the same situation occurs, but the panel 11 forming the dredging unit 2 is attached with the filter 11 previously described at the inlet into which the rainwater flows. Therefore, the filter 11 prevents the inflow of heavy particulate matter or suspended solids, so that rainwater mainly containing fine particulate matter having a relatively low specific gravity flows in. The fine particulate matter of rainwater settles on the corrugated bottom portion of either the throat attached to the bottom surface of the dredging unit 2 or the rainwater guide surface 22 of the rectifying bottom plate 21 for discharging sludge. The fine particles are deposited in a mud and sludged state due to low viscosity or softness. The mud and sludge accumulated on the rectifying bottom plate 21 have a gradient of the rainwater guide surface 22 having the waveform of the rectified bottom plate 21 toward the discharge port. It is discharged from the sludge discharge port 6 to the outside of the soot unit 2 by the gradient.

  Also, if the filter is clogged due to some phenomenon, or if mud and sludge accumulate abnormally in the cavity in the dredging unit 2 due to some phenomenon, remove the filter or attach the filter to the short tube And remove the cavity and corrugated plate with a high pressure washer. As described above, since the rectification bottom panel 21 for discharging the sludge and sludge is attached to the bottom bottom surface of the dredging unit 2, it becomes possible to appropriately maintain and manage the hollow portion in the dredging unit 2. Can be eliminated.

  The present invention relates to a rainwater storage and penetration facility that collects rainwater that has fallen on the roof or paved surface of a building during rainfall, temporarily stores it, and then gradually infiltrates the ground to treat rainwater. It has industrial applicability especially in the fields of urban development and residential land development in that it can construct a facility of arbitrary scale.

It is the top view, front view, and side view which show the example of the panel for assembling the dredging unit of the rainwater storage penetration facility by this invention. It is the front view and side view which show the example of the state which combined the panel for assembling the dredging unit of the rainwater storage penetration facility by this invention up and down. It is a perspective view which shows the example of the dredging unit of the rainwater storage penetration facility by this invention. It is a top view which shows the example of the state which has arrange | positioned and connected the dredging unit of the rainwater storage penetration facility by this invention on a foundation bottom board. It is a side view which shows the example of the state which has arrange | positioned and connected the dredging unit of the rainwater storage penetration facility by this invention on a foundation bottom board. It is a front view which shows the example of the state which has arrange | positioned and connected the dredging unit of the rainwater storage penetration facility by this invention on the foundation bottom board. It is a vertical side view which shows the example of the state which has arrange | positioned and connected the dredging unit of the rainwater storage penetration facility by this invention on the foundation bottom board. It is a vertical front view which shows the example of the state which has arrange | positioned and connected the dredging unit of the rainwater storage penetration facility by this invention on the foundation bottom board. It is a vertical side view which shows the other example of the state which has arrange | positioned and connected the dredging unit of the rainwater storage penetration facility by this invention on the foundation bottom board. It is the front view and side view which show the example of the filter attached to the dredging unit of the rainwater storage penetration facility by this invention. It is the front view and side view which show the other example of the filter attached to the dredging unit of the rainwater storage penetration facility by this invention. It is a side view which shows the example of the state which attached the filter before attaching to the panel of the dredging unit of the rainwater storage penetration facility by this invention. It is the top view which shows the example of the rectification bottom board attached to the bottom part of the dredging unit of the rainwater storage penetration facility by this invention, front view, and AA sectional view. It is the top view and BB sectional drawing which show the example of the state which attached the rectification | straightening board to the bottom part of the dredging unit of the rainwater storage penetration facility by this invention.

Explanation of symbols

1 Panel 2 １ Unit 11 Filter 14 Hemispherical Body 15 Slit 21 Rectification Bottom Panel 22 Rainwater Guide

Claims (3)

A rainwater storage and infiltration facility for storing rainwater and further infiltrating the rainwater into the ground, using a plurality of types of panels (1) having a constant width (w) and different lengths (L). Assemble flat rectangular hollow column-shaped dredging units (2), arrange these dredging units (2) at vertical and horizontal intervals, fix these dredging units (2) to each other, and store rainwater in the ground A rainwater storage and infiltration facility characterized by the formation of a space to perform. A filter (11) provided with slits (15) radially from the center of a hollow hemispherical body (14) is attached to the ridge unit (2) on the panel (1) that constructs it. The rainwater storage and penetration facility according to 1. A rectifying bottom plate (21) having a rainwater guide surface (22) having a corrugation on the upper surface at the bottom of the dredge unit (2) and having a gradient set in a direction perpendicular to the wavelength direction of the corrugation is provided. The panel (1) on the lowest side of the slope of the rainwater guide surface (22) of the bottom plate (21) has a rainwater discharge hole (6) corresponding to the corrugated groove portion. The rainwater storage and penetration facility according to claim 1.

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