JP7021385B1 - Stormwater retention board of rainwater storage and infiltration facility and rainwater storage and infiltration facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rainwater storage and infiltration facility in which the accumulated state of sediment in a tank can be easily confirmed from the upper part of the facility and easy to clean the entire tank, and a sediment retention plate applied to the rainwater storage and infiltration facility. The purpose is to do. SOLUTION: In this sedimentation retention plate 120, corners of upper and lower face plates are connected to each other by pedestals, and a plurality of frame-shaped block units 115 are spread in the ground 112 to form side edges in close contact with the side surface of the pedestals. It has and is fitted between adjacent pedestals so that the side portion of the frame-shaped block unit 115 is closed. The rainwater storage and infiltration facility 105 communicates with the sediment retention airspace 118 surrounded by the frame-shaped block unit, the inspection opening (122) formed above the sediment retention airspace, and the sediment retention airspace. It has a rainwater inflow section and a water storage outflow section provided at the other end of the facility, and the side portion of the frame-shaped block unit surrounding the sediment retention airspace is blocked by the sediment retention plate. [Selection diagram] FIG. 13

Description

The present invention relates to a rainwater storage and infiltration facility and a sediment retention plate of a rainwater storage and infiltration facility. In particular, the present invention relates to a rainwater storage and infiltration facility and a rainwater storage and infiltration facility in which sludge such as sediment and dust that flows in and accumulates together with rainwater is trapped in a sediment retention airspace formed near the rainwater inflow inlet in the facility. Concerning sediment retention board.

This type of rainwater storage and infiltration facility is installed in the basement of public facilities such as roads, parks, and parking lots, and is composed of a large number of unit members made of plastic material assembled in the horizontal and vertical directions. Conventionally, various structures have been used as structural members that cover the structure of the rainwater storage and infiltration facility with a permeable and impermeable sheet to store rainwater in the voids inside the rainwater storage and infiltration facility and support the load in the vertical direction. Is being developed. In such a rainwater storage and infiltration facility, a facility having a large porosity in the rainwater storage space is preferable because the capacity of the stored rainwater is large. Further, when the period of use is long, earth and sand accumulate inside the rainwater storage and infiltration facility, so that it is desired that the inside of the rainwater storage and infiltration facility can be easily inspected and the accumulated earth and sand can be easily removed.

As such a rainwater storage and infiltration facility, it has been conventionally known that the unit members constituting the facility are arranged in close contact with each other in the horizontal direction and the vertical direction, and the unit members are connected by a joint member. (For example, Patent Documents 1 and 2). Further, as in Patent Document 3, the unit members are arranged at regular intervals from each other, the corners of the four adjacent unit members are connected by a joint member, and the ceiling portion of the four unit members is further connected. By covering the ceiling with a top plate member, the weight per unit volume is reduced, and an inspection port penetrating in the vertical direction is formed to facilitate the inspection work of the rainwater storage and infiltration facility. In addition, a method has already been disclosed in which the porosity of the rainwater storage space is improved and a large number of inspection ports penetrating in the vertical direction are formed to facilitate the inspection work of the rainwater storage and infiltration facility (Patent Document 4). ..

Japanese Unexamined Patent Publication No. 10-252108 Japanese Patent Application Laid-Open No. 2002-309658 Japanese Unexamined Patent Publication No. 2010-48010 Japanese Unexamined Patent Publication No. 2019-73855

In the rainwater storage and infiltration facilities of Patent Documents 1 and 2, the constituent unit members are densely arranged, and since these are connected by a joint member, the weight per unit volume increases and the porosity of the rainwater storage space increases. It has decreased, and there are problems in terms of costs such as material costs. Further, also in Patent Document 3, since a joint member is required to connect adjacent unit members, the number of parts increases and it is difficult to add a unit member on the top plate member, so that the rainwater storage space It was difficult to increase the volume of. Although the rainwater storage and infiltration facility of Patent Document 4 is effective in that the number of members for constructing the structure is small, the porosity of the rainwater storage space is improved, and the inspection work of the facility is facilitated, the structure is effective. There is a problem that it takes a lot of time and effort to connect the constituent members, such as assembling the components, particularly aligning the constituents when stacking the constituents in two or more stages.

In addition, in the rainwater storage and infiltration facility, sediment and dust enter the tank as the rainwater flows in, and this diffuses and deposits throughout the tank. It was necessary to clean and remove the deposits that spread over the entire bottom of the tank, and the cleaning work required a lot of labor.

Even in the conventional rainwater storage and infiltration system of this type, there is a system in which an additional device with a sedimentation control function is installed outside the tank as needed, but an installation area for that purpose must be secured separately. In addition, the effect of suppressing sedimentation was not yet sufficient.

In the present invention, sand and dust that infiltrate with the inflow of rainwater into the tank are accumulated in one place in the tank, and the accumulated state of sediment in the tank can be easily confirmed from the upper part of the facility. It is an object of the present invention to provide a rainwater storage and infiltration facility that can be easily cleaned as a whole and a sediment retention plate applied to this rainwater storage and infiltration facility.

The present invention also provides a sediment retention plate of a rainwater storage and infiltration facility in which a storage airspace for deposits such as sand and dust can be freely arranged in the facility, and a rainwater storage and infiltration facility having a strength capable of withstanding the water pressure in the tank. The purpose is to provide.

According to the present invention, a rainwater storage and infiltration facility in which the corners of the upper and lower face plates are connected to each other by pedestals, and a plurality of frame-shaped block units in which the pedestals are divided into two upper and lower bodies are spread in the ground. It is a sedimentation board of
Provided is a sediment retention plate of a rainwater storage and infiltration facility, which has a side edge portion in close contact with the side surface of the pedestal and is fitted between adjacent pedestals.

According to one embodiment of the present invention, a vertically long wide portion that is in close contact with the side surface of the pedestal is formed on the side edge portion, and a flange portion that is in close contact with the side surface of the pedestal is formed on the vertically long wide portion. There is.

Further, according to another embodiment of the present invention, the pedestal of the frame-shaped block unit has a circular cross section and a reduced diameter toward the central portion in the length direction. The side edge of the sediment retention plate is in close contact with the side surface of the pedestal of the frame-shaped block unit over the entire length.

Further, according to another embodiment of the present invention, the side edges of the frame-shaped block unit that are in close contact with each side surface of the adjacent pedestal and the upper and lower plates of the frame-shaped block unit are closely attached and sandwiched between the upper and lower face plates. Provided is a sediment retention plate of a rainwater storage and infiltration facility having an upper and lower end portions and a locking convex portion formed in the upper and lower end portions to be fitted with a locking concave portion of the upper and lower face plates.

Further, according to another aspect of the present invention, there is provided a sediment retention plate of the rainwater storage and infiltration facility, characterized in that the sediment retention plate of the rainwater storage and infiltration facility is formed of a plastic plate.

Further, according to another embodiment of the present invention, the sedimentation retention plate of the rainwater storage and infiltration facility is formed of a plastic plate body, and the plastic plate body is characterized by having a hole. A sedimentation board for the storage and infiltration facility is provided.

In the rainwater storage and infiltration facility according to the present invention, a plurality of frame-shaped block units in which the corners of the rectangular upper and lower face plates are connected by pedestals and the pedestals are divided into two upper and lower bodies are X, in the ground. In the rainwater storage and infiltration facility laid out in the Y direction, the frame-shaped block unit laid out in the X and Y directions is partially removed and the surrounding area is surrounded by the frame-shaped block unit. It has an airspace portion, an inspection opening formed above the sediment retention airspace portion, a rainwater inflow portion communicating with the sediment retention airspace portion, and a water storage outflow portion provided at the other end of the facility. The side portion of the frame-shaped block unit surrounding the sediment retention airspace portion is closed with a sediment retention plate, and the sediment retention plate has a side edge portion in close contact with the side surface of the pedestal. , It is fitted between the adjacent pedestals, whereby the side portion of the frame-shaped block unit is closed.

According to one form of the rainwater storage and infiltration facility according to the present invention, in the sedimentation retention plate, a vertically long wide portion in close contact with the side surface of the pedestal is formed on the side edge portion, and the vertically long wide portion is formed with the vertically long wide portion. A collar that is in close contact with the side surface of the pedestal is formed.

Further, according to another embodiment of the rainwater storage and infiltration facility according to the present invention, the pedestal of the frame-shaped block unit has a circular cross section and contracts toward the central portion in the length direction. The sediment retention plate has a diameter shape, and the side edge portion thereof has a shape in which the side edge portion is in close contact with the side surface of the pedestal of the frame-shaped block unit over the entire length.

According to still another embodiment of the rainwater storage and infiltration facility according to the present invention, the sediment retention plate has a side edge portion in close contact with each side surface of the pedestal adjacent to the frame-shaped block unit and the frame-shaped block. It has an upper and lower end portions that are in close contact with the upper and lower surface plates of the unit and are sandwiched between the upper and lower face plates, and a locking convex portion that fits with the locking concave portion of the upper and lower face plates is formed in the upper and lower end portions.

According to the present invention, sand and dust that infiltrate with the inflow of rainwater into the tank are accumulated in one place in the tank, and the accumulated state of sediment in the tank can be easily confirmed from the upper part of the facility. Therefore, the storage space for deposits such as sand and dust can be freely arranged in the facility, and the entire tank can be easily cleaned.

Further, according to the present invention, the space between the pedestals of the frame-shaped block unit in the rainwater storage and infiltration facility can be tightly closed with a sedimentation plate with sufficient strength, and the water pressure due to a large amount of rainwater can be dealt with. In addition, it is easy to install a sedimentation board, and the rainwater storage facility function can be maintained for a long period of time.

It is a perspective view of the unit block member of the 4-leg form which concerns on embodiment of this invention. It is a perspective view of the unit block member of the two-leg form which concerns on embodiment of this invention. It is a perspective view of the unit block member of the single leg form which concerns on embodiment of this invention, and FIG. b) is a diagram showing a one-leg unit block member in a form in which a convex fitting portion is formed at the tip of the leg portion. It is a perspective view of the frame-shaped block unit in the form of a four-legged column according to the embodiment of the present invention in which a pair of four-legged unit block members shown in FIG. 1 are faced up and down and connected. It is a perspective view of the frame-shaped block unit in the form of a two-legged column according to the embodiment of the present invention in which a pair of two-legged unit block members shown in FIG. 2 are faced up and down and connected. FIG. 3 is a perspective view of a block unit in the form of a single pedestal according to an embodiment of the present invention in which a pair of single-leg unit block members shown in FIG. 3 are faced up and down and connected. It is a perspective view of an Example in which a plurality of block units according to the present invention are arranged in the X and Y directions to form a one-stage structure. It is a perspective view of the base unit structure arranged on the foundation floor under the structure of the one-stage form shown in FIG. 7. It is a perspective view of the Example which piled up in a two-stage form and made into a two-stage block unit structure. It is a perspective view of the Example which piled up in 3 steps form and made into 3 steps block unit composition. It is a perspective view which shows the lid member which covers the uppermost surface of the block unit composition which arranged the frame-shaped block units in the X and Y directions. It is a top view which showed the arrangement relation of the lower unit and the upper unit of the block unit composition stacked in a plurality of stages. It is sectional drawing of the whole side of the sediment-retaining type rainwater storage infiltration facility which concerns on Example of this invention. It is sectional drawing of the whole side of the sediment-retaining type rainwater storage infiltration facility which concerns on other embodiment of this invention. FIG. 13 is a partially enlarged side sectional view of FIG. It is a perspective view which showed the arrangement state of the unit block member at the bottom of the sedimentation accumulation airspace part which concerns on embodiment of this invention. FIG. 16 is a perspective view showing a state in which a sedimentation retention plate according to the present invention is installed on a unit block member at the bottom of a sediment retention airspace shown in FIG. It is a perspective view which shows the rainwater storage infiltration facility which installed the sedimentation retention plate which concerns on embodiment of this invention. It is a perspective view of the sedimentation accumulation plate which concerns on embodiment of this invention. It is a perspective view of the state in which the sedimentation retention plate is sandwiched between the legs of the unit block member. It is a perspective view of a state in which a sedimentation retention plate is sandwiched between adjacent pedestals of a four-legged frame-shaped block unit. It is a perspective view of the sedimentation accumulation airspace part where the insertion opening of the inflow pipe was formed in the side plate of a storage tank. It is a perspective view of the sedimentation retention plate which has the overflow hole of the sedimentation retention plate which concerns on embodiment of this invention. It is a perspective view of the sedimentation accumulation plate which concerns on other embodiment of this invention. It is a perspective view of the state in which the sedimentation retention plate shown in FIG. 24 is installed on the unit block member at the bottom of the sediment retention airspace. It is a perspective view of the state in which the sedimentation retention plate shown in FIG. 24 is sandwiched between the legs of the unit block member. It is a perspective view which shows the rainwater storage infiltration facility which installed the sedimentation accumulation board shown in FIG. 24.

Next, the present invention will be described with reference to the drawings for various examples.
The rainwater storage and infiltration facility according to the present invention is composed of an array structure of a plurality of frame-shaped block units, and the frame-shaped block unit is composed of a pair of unit block members. First, an embodiment of the unit block member will be described. The unit block member 101 shown in FIG. 1 is configured as a four-legged block form, and is composed of a rectangular plate 11 having a cross-shaped face plate portion 12 formed on one side thereof and a cross-shaped face plate portion 12 of the square plate 11. A rectangular recess 15 formed at the four corners of one side of the square plate 11 adjacent to each of the four arm portions 13 and having a through hole 14 on the bottom surface thereof, and a rectangular recess 15 having a through hole 14 on the bottom surface of the rectangular plate 11 are aligned with the through hole 14 of the rectangular plate 11. It has four hollow tubular legs 16 extending from the other side (the back surface of the rectangular plate when viewed in the illustrated state). The illustration on the back surface is omitted here.

The rectangular recess 15 has two recessed partition walls 18 each defining the recess 15 with respect to the cross-shaped face plate portion 12 of the rectangular plate 11, and the bottom surface of the rectangular recess 15 is an outer portion of a corner portion of the rectangular plate 11. It is connected to 11a. Then, the connecting portion (connecting ridge portion) between the bottom surface of the rectangular recess 15 and the outer portion 11a of the square plate 11 and the connecting portion between the bottom surface of the rectangular recess 15 and the recessed partition wall 18 (the connecting portion between the partition wall 18 and the rectangular bottom surface). Inclined surfaces 19 and 20 are formed on the edges), respectively. Of the four legs 16 extending from the back surface of the square plate, convex fitting portions 83 are formed at the tips of the two legs in the diagonal direction, and concave at the tips of the other two legs. Fitting portion (not shown) is formed. This uneven fitting portion will be described later in relation to the frame-shaped block unit. Each arm portion of the cross-shaped face plate portion 12 has the same width dimension d, which will be further described later with respect to the arrangement and stacking of the frame-shaped block units. The face plate portion 12 is formed with a large number of water passage holes 73 leading to the back surface, and the rectangular recess 15 is also formed with a large number of small diameter water passage holes 74 extending to the back surface thereof.

The unit block member 211 of the embodiment shown in FIG. 2 is configured as a two-legged block form, and is referred to here as a side two-legged unit block member 211 from the viewpoint of the place of use. As shown in the figure, a rectangular face plate portion 22 is formed in the center of one side of the rectangular plate, and a rectangular low surface portion 23 having a height lower than that of the rectangular face plate portion 22 is formed adjacent to the face plate portion 22 on both sides thereof. ing. Further, a through hole 24 is formed in each rectangular low surface portion 23, and a pair of hollow cylinders matching the through hole 24 of each rectangular low surface portion 23 on the other side (the back surface and the back surface of the rectangular plate are not shown). The rectangular leg portion 25 is formed. Of the pair of hollow tubular leg portions 25, a convex fitting portion 83 is formed at the tip of one leg portion 25, and a concave fitting portion (not shown) is formed at the tip of the other leg portion 25. Is formed. The functions of these convex and concave fitting portions are the same as in the case of the 4-leg unit block member 101 of FIG. 1, and the pair of unit block members are joined so that the tips of the leg members face each other to form a frame-shaped block unit (a frame-shaped block unit ( When configuring (described later), the convex and concave fitting portions are fitted to each other. Also in the two-leg unit block member 211 of this two-leg block form, the connecting portion between the partition wall 26 defining the rectangular low surface portion 23 and the bottom surface 27 of the rectangular low surface portion 23, and the bottom surface 27 and the member side of the rectangular low surface portion 23. Inclined surfaces 29 and 30, respectively, are formed at the connecting portion with the portion 28 (side portion of the rectangular plate). Even in the two-leg unit block member 211 of this two-leg block form, the face plate portion 22 has the same width dimension d as the four-leg unit block member 101 of FIG. Also in the two-leg unit block member 211 of FIG. 2, a large number of water passage holes 78 leading to the back surface are formed in the rectangular face plate portion 22, and the bottom surface 27 and the inclined surface 29 of the rectangular bottom surface portion 23 extend to the back surface, respectively. A large number of small-diameter water passage holes 79 are formed.

The unit block members 311 (a) and 311 (b) of the embodiment shown in FIGS. 3A and 3B are examples in which the bundle branch block has one leg. A rectangular plate 33 having a through hole 32 in the center, a partition wall 35 formed on two side edges of the face plate portion 34 of the rectangular plate 33, and a partition wall 35 formed on the other side of the rectangular plate 33 in line with the through hole 32. It has one hollow tubular leg portion 39. The monopod unit block members 311 (a) and 311 (b) are often referred to as corner unit block members because they are often arranged mainly at the corners of the facility structure. Also in the unit block members 311 (a) and 311 (b) in the monopod form, the connecting portion between the face plate portion 34 of the rectangular plate 33 and the partition wall 35, and the face plate portion 34 and the rectangular plate side portion 36 of the rectangular plate 33. Inclined surfaces 37 and 38 are formed at the connecting portion with the above, respectively. A convex fitting portion 95 is formed at the tip of the hollow tubular leg portion 39 of the unit block member 311 (b) of one monopod, and the hollow tubular leg of the unit block member 311 (a) of the other single leg. A concave fitting portion (not shown) that fits with the convex fitting portion 95 is formed at the tip of the portion 39. As will be described later, in the case of forming a block unit in the form of a monopod by connecting a pair of single-legged unit block members 311 (a) and 311 (b) so that the tips of the legs face each other up and down. The convex fitting portion 95 at the tip of each leg portion 39 and the concave fitting portion are fitted. Further, similarly to the four-leg unit block member 101 and the two-leg unit block member 211 of FIGS. 1 and 2, the face plate portion 34 of the rectangular plate 33 is also used in the monopod unit block members 311 (a) and 311 (b). A large number of penetrating water passage holes 84 and small diameter water passage holes 85 are formed in. These water passage holes are also formed on the inclined surfaces 37 and 38 as in the cases of FIGS. 1 and 2.

FIG. 4 is a perspective view showing the frame-shaped block unit 40 according to the embodiment of the present invention. The frame-shaped block unit 40 of the embodiment has a configuration in which the four-legged unit block members 10 shown in FIG. 1 are connected vertically facing each other. A pair of four-leg unit block members 101 having the same shape are arranged so that their respective hollow tubular legs 16 face each other in the axial direction, and an uneven portion formed on the tip surface of both hollow tubular legs 16 is fitted. In this case, the frame-shaped block unit 40 according to the present invention is configured by being connected. That is, the back surfaces 11b of the square plates 11 of the pair of 4-leg unit block members 101 face each other, and the space between them is connected by four pedestals to which the legs 16 are joined. In the frame-shaped block unit 40 in the form of four pedestals in FIG. 4, the same parts as those of the constituent members shown in FIG. 1 are designated by the same reference numerals, and the overlapping description thereof will be omitted to the extent possible. Further, the front surface and the back surface 11b of the face plate portion 12 of the frame-shaped block unit 40 in FIG. 4 are shown in a blank form for clarity in drawing, but actually penetrated as described in FIG. A water passage hole 73 (FIG. 1) is formed, and a large number of small-diameter water passage holes 74 (FIG. 1) penetrating the back surface are also formed in the rectangular recess 15.

In addition to the four-pillar-shaped frame-shaped block unit 40, the two-pillar-shaped frame-shaped block unit 41 shown in FIG. 5 is used as a member element constituting the rainwater storage and infiltration facility according to the present invention. In this two-legged column-shaped frame-shaped block unit 41, a pair of unit block members (side two-legged unit block members) 211 in the two-legged form shown in FIG. 2 face each other of the hollow tubular legs 25. It is a structure that is connected together. Also in the case of the frame-shaped block unit 41 in the form of two pedestals in FIG. 5, a large number of water passage holes 78 (FIG. 2) penetrating the rectangular face plate portion 22 are actually formed, and the rectangular bottom surface portion 23 and the inclined surface 29 are formed. A large number of penetrating water passage holes 79 (FIG. 2) are formed in the portions 30 and 30, but these water passage holes are omitted in FIG. 5 for the sake of clarity. In the frame-shaped block unit 41 of FIG. 5, the same components as those of the two-leg unit block member 211 of FIG. 2 are designated by the same reference numerals.

In addition, as the member elements constituting the rainwater storage and infiltration facility according to the present invention, a pair of single-legged unit block members (corner unit block members) 311 (a) and 311 shown in FIGS. 3 (a) and 3 (b). A block unit (corner block unit) 42 in the form of a single pedestal, in which (b) is connected by facing the hollow tubular legs 39 to each other, is used (FIG. 6). In the case of the block unit 42 in the form of a single pedestal shown in FIG. 6, a large number of penetrating water passage holes and small diameter water passage holes are formed in the face plate portion 34 of the rectangular plate, and small diameter water passage is also formed in the inclined surfaces 37 and 38. Although holes are formed, they are not shown in FIG. 6 for the sake of clarity in drawing. In FIG. 6, the same parts as those of the members of FIGS. 3A and 3B are designated by the same reference numerals.

In the rainwater storage and infiltration facility according to the embodiment of the present invention, a plurality of the frame-shaped block units composed of a pair of the unit block members having a four-legged block configuration are arranged in the X and Y directions with predetermined intervals from each other. The basic tank configuration is a form installed in the ground, and depending on the situation, a frame-shaped block unit in the form of two pedestals is formed on the side of the tank, and a unit block member in the form of one pedestal is formed at the corner of the tank. The block unit is installed. The entire upper surface of the tank composed of such a block unit is shielded by a lid plate having a large number of through holes and a shield that can be flooded.

In FIG. 7, a plurality of frame-shaped block units 40 in the form of four pedestals are arranged in the X and Y directions at predetermined intervals and buried in soil covering, and two pedestals are placed on two sides of the entire structure. The side frame-shaped block unit 41 of the form is arranged, and the corner block unit 42 of the single pedestal form is arranged at the corner of the structure. The example shown in the figure is an example in which a structure consisting of frame-shaped block units arranged in the X and Y directions is configured in one stage. Space can be secured. When configured as a permeation type, a lid that can be flooded is spread on the upper surface of the structure, and then covered with a water-permeable sheet, and the bottom and sides of the structure are also covered with an appropriate water-permeable sheet to prevent the inflow of earth and sand. Rainwater can permeate into the constituent body of the frame-shaped block unit while preventing it. In the case of a rainwater storage type, the side and bottom of the structure are covered with a protective sheet or a water-impervious sheet. FIG. 8 shows a base block structure 47 arranged on the foundation floor under the one-stage structure shown in FIG. 7. The upper surface of these base block configurations 47 has the same shape as the unit block members 101, 211, 311 (a) and 311 (b) of FIGS. 1 to 3, but there is no pedestal extending from the lower surface.

Next, as shown in FIG. 9, a rainwater storage and infiltration facility having a structure in which a plurality of frames of frame-shaped block units arranged in the X and Y directions are stacked one above the other will be described. The example shown is a two-stage rainwater storage and infiltration facility 50, in which a plurality of four-pillar-shaped frame-shaped block units 40 arranged in the X and Y directions are stacked in two upper and lower stages to form a storage tank. The frame-shaped block unit 41 in the form of two pedestals is arranged on the side thereof, and the block unit 42 of one pedestal is arranged on the corner portion. FIG. 10 is a perspective view of the rainwater storage and infiltration facility 58 having a three-tiered structure. In both FIGS. 9 and 10, the four-pillar-shaped frame-shaped block unit 40, the two-pillar-shaped frame-shaped block unit 41 and the one-pillar-shaped block unit 42 have water passage holes formed in their face plates, which are not shown. However, in reality, as already described, a large number of penetrating water passage holes and small-diameter water passage holes are formed. As shown in FIG. 11, the uppermost four-column and two-column frame-shaped block units and the corner block units are provided with lid members 55, 56, 57 having water passage holes (not shown). ..

Next, a stacking mode in which frame-shaped block units arranged in the X and Y directions are stacked in two or more stages will be described with reference to FIG. FIG. 12 is a partial plan view schematically showing the arrangement relationship between the lower frame-shaped block unit 51 and the frame-shaped block unit 52 installed on the upper side thereof. For clarification, the lower (first stage) frame-shaped block unit 51 is shown by a solid line, and the upper (second stage) frame-shaped block unit 52 is shown by a virtual line. First, the lower frame-shaped blocks arranged in the X and Y directions having an interval d corresponding to the width dimension d of the arm portion of the cross-shaped flat portion of the unit block member having a four-legged block configuration. The upper frame-shaped block unit 51 is located on the upper side of the unit 51 at a position offset in the diagonal direction, and is straddled by the rectangular recesses at the four corners adjacent to each of the four lower frame-shaped block units 51 in the diagonal direction. A plurality of block units 52 are arranged side by side in the X and Y directions, and the rectangular recesses of the lower and upper frame-shaped block units 51 and 52 are joined to each other. The third-stage frame-shaped block unit (not shown) arranged on the second-stage frame-shaped block unit shown by the virtual line is the first stage corresponding to the solid line first-stage frame-shaped block unit 51. Placed in the same position as the eyes. In addition, two pedestals are placed on the side of the structure so as to fill the gaps between the sides and the corners of the structure due to the arrangement of the upper and lower frame-shaped block units in such a positional relationship shifted in the diagonal direction. The side frame-shaped block unit 41 (FIG. 5) and the corner block unit 42 (FIG. 6) having one pedestal configuration are arranged.

FIG. 13 is a schematic overall side sectional view of the rainwater infiltration type rainwater storage and infiltration facility according to the embodiment of the present invention, and FIG. 14 is a schematic view of the rainwater storage type rainwater storage and infiltration facility of the embodiment configured as a storage type. It is a cross-sectional view of the whole side. Further, FIG. 15 is a partially enlarged side sectional view of FIG. 13. In this embodiment, the frame-shaped block unit 115 (FIG. 15) is configured in the form of a storage tank stacked in three upper and lower stages and is buried in the ground. In addition, an outflow pool of stored water is arranged on the other side. In the embodiment of FIG. 13, the bottom surface and the entire side surface of the tank are covered with a water permeable sheet to form a permeation type. A rainwater introduction pipe 103 from the ground is communicated with the rainwater inflow reservoir 102 outside the tank, and the rainwater of the inflow reservoir 102 passes through the rainwater inflow pipe 104 at the uppermost stage of the rainwater storage and infiltration facility 105, in the third stage in the embodiment. It is designed to flow into the frame-shaped block unit of the eyes. Further, the rainwater storage and infiltration facility shown in FIG. 13 is configured as an infiltration type facility, and the entire outer surface 106, the tank upper surface 107 and the tank bottom surface 108 of the entire storage and infiltration tank are covered with a water permeable sheet. .. Rainwater that has entered the soil filling 111 at the top of the facility from the ground surface 110 enters the tank from the permeable sheet on the top surface 107 of the tank, and part of the rainwater in the tank passes through the permeable sheet on the side of the tank and the bottom of the tank to 112 in the ground. Penetrate into. The rainwater stored in the rainwater storage and infiltration facility 105 is discharged from the outflow pipe 113 at the upper part of the tank on the other end side of the facility to the outflow reservoir 114 outside the tank. In the illustrated embodiment, two outflow reservoirs are provided in tandem, and the two are connected by an outflow pipe. Since sludge such as earth and sand and dust that flow in with rainwater accumulates in the inflow reservoir 102 and the outflow reservoir 114 outside the tank, they are cleaned regularly or at any time.

The rainwater storage and infiltration facility shown in FIG. 14 is configured as a storage type facility. The storage infiltration tank itself, in which frame-shaped block units are stacked in multiple stages, is the same as that of the infiltration type shown in FIG. It is covered with a permeable sheet. The side surface, bottom surface, and top surface of the tank have a three-layered sheet structure, in which a protective sheet is installed on the inside and outside, and a water-impervious sheet is installed on the inside thereof. In the storage type, the rainwater in the tank does not permeate into the ground from the bottom, and a large amount of rainwater collects in the tank. Therefore, the outflow reservoir 114 has a larger capacity than the infiltration type. As shown in the figure, the outflow reservoir 114 is connected by the outflow pipe 116 at the bottom of the tank, and the upper part of the tank and the outflow reservoir 114 are connected by the overflow pipe 117. This stormwater storage and infiltration facility is made of plastic material.

According to FIG. 15, the rainwater collected in the inflow reservoir 102 outside the tank flows into the tank composed of the frame-shaped block unit 115 of the rainwater storage and infiltration facility 105 via the inflow pipe 104. Adjacent to 104, a sediment retention airspace portion 118 of a required size is provided in the tank of the rainwater storage and infiltration facility 105. As will be described later, the sediment retention airspace portion 118 is closed around the sediment retention plate 120. Although a dust removal filter 121 is provided in the inflow pipe 104 that connects the inflow reservoir 102 outside the tank and the sediment accumulation airspace portion 118, sludge such as earth and sand and dust will be collected along with the inflowing rainwater due to continued use for a long period of time. It collects at the bottom of the sediment retention airspace portion 118 surrounded by the sediment retention plate 120, and does not diffuse to the entire tank of the storage infiltration facility 105. A management inspection port 122 is provided above the stagnant airspace portion 118. The inspection port 122 opens to the ground surface 110, but is normally closed with a lid. From the inspection port 122, the internal condition of the stagnant airspace portion 118, the accumulation state of sediment, etc. are inspected, and from the inspection port 122, the sediment and dust in the stagnant airspace portion 118 are removed and cleaned. In the embodiment of FIG. 13, the sediment retention plate 120 is provided so as to surround the sediment retention airspace portion 118 for the first and second block units of the three-tiered frame-shaped block unit 115. As another embodiment, it is also possible to provide a sedimentation plate in the entire three stages or only in the first stage.

FIG. 16 is a perspective view showing an example of the arrangement state of the bottom unit block member 123 in the sedimentation retention airspace portion, and FIG. 17 is the present invention for the bottom unit block member 123 of the sediment retention airspace portion 118 shown in FIG. It is a perspective view of the state in which the sedimentation accumulation plate 120 is installed. Further, FIG. 18 is a perspective view showing a sedimentation retention airspace portion 118 of the rainwater storage and infiltration facility according to the embodiment of the present invention. In this embodiment, an example of a form in which the frame-shaped block units 115 are stacked in two upper and lower stages is shown. In the embodiment of this two-stage configuration, the space between the adjacent pedestals 124 in the lowermost frame-shaped block unit 115 is blocked by the sediment retention plate 120, whereby the lower periphery of the sediment retention airspace portion 118 is blocked. The sludge such as earth and sand and dust contained in the rainwater that has flowed into the sediment accumulation airspace 118 from the inflow pipe is collected in the sediment retention airspace 118 without spreading to the entire rainwater storage and infiltration facility.

FIG. 19 is a perspective view of a sedimentation retention plate according to an embodiment of the present invention. FIG. 20 is a perspective view of a sedimentation retention plate sandwiched between four pedestal-shaped frame-shaped block units. Further, FIG. 21 is a perspective view of a state in which the sediment retention plate 120 is mounted between the legs of the unit block member, and FIG. 22 is a perspective view of the sediment retention plate between adjacent pedestals of the four-leg frame-shaped block unit. It is a perspective view of the state in which 120 is sandwiched. As shown in FIGS. 4 to 5, the pedestal of the frame-shaped block unit 115 is a column having a tapered (conical) circular cross section in which the central portion 130 has a slightly reduced diameter, and sediment retention. The plate 120 has a side shape that is closely joined to the peripheral side of the pedestal. As is clearly shown in FIG. 19, both side portions 120a of the sedimentation retention plate 120 have a shape in which the middle portion is slightly bent outward in accordance with the shape of the conical pedestal of the frame-shaped block unit. It has a wide side shape that is curved so as to be in close contact with the circumference of the conical pedestal of the frame-shaped block unit. The vertically long wide part extending up and down on the side is curved in the horizontal direction with respect to the vertical direction so as to be in close contact with the peripheral surface of the pedestal. A curved flange portion 120c is formed. Due to such a side portion shape, the contact area between the side portion of the pedestal and the side portion 120a of the sedimentation retention plate 120 is widened, and the sludge accumulated in the sedimentation retention airspace portion 118 is prevented from leaking to the outside. Ru. A locking protrusion 120b is formed at the upper and lower ends of the sediment retention plate 120, and the sediment retention plate 120 is locked to the face plate of the frame-shaped block unit 115 that sandwiches the upper and lower ends of the sediment retention plate 120. A locking recess (not shown) that fits with the protrusion 120b is formed, and the sediment retention plate 120 can reliably withstand the water pressure of rainwater that collects in the sediment retention airspace portion 118. The sedimentation retention plate 120 is formed by integral molding with a plastic material, whereby the block unit of the rainwater storage and infiltration facility made of the plastic material is fitted with the elasticity peculiar to the plastic material.

The side of the sediment accumulation airspace 118 adjacent to the rainwater inflow pipe is covered with a side plate 131 having a large number of water passage holes, and as shown in FIG. 22, the rainwater inflow pipe is inserted into this side plate 131. The opening 132 is formed. If a retention plate is installed up to the second stage of the sediment retention airspace 118 in a three-tiered storage tank, and the inflow of rainwater that has flowed into the sediment retention airspace 118 increases, the sediment retention plate Rainwater overflows from the upper edge of the 120 to the adjacent tank, and is discharged from the outflow pipe on the drain side to the outflow reservoir 114 (FIGS. 13 and 14) outside the tank. It is also possible to install the sediment retention plate 120 up to the frame-shaped block unit 115 of the third stage in the facility storage tank of three stages, but in such a case, the sediment retention plate of the third stage is shown in the figure. As shown in 23, an overflow hole 133 for rainwater can be provided so that rainwater can overflow from this hole. The sedimentation plate on the inflow pipe side is provided with an inflow hole for rainwater that communicates with the inflow pipe.

As described above, according to the present invention, the inspection port for management of the rainwater storage and infiltration facility and the rainwater retention airspace below it are provided adjacent to the rainwater inflow port, and the surrounding area is surrounded by the wall of the sediment retention plate. By surrounding it, sand and dust that have flowed in together with rainwater can be accumulated in the stagnant airspace, and sediment and sludge accumulated in the tank can be easily removed and cleaned, and the rainwater storage facility function can be maintained for a long period of time. ..

Next, the sediment retention plate 220 according to another embodiment of the present invention will be described with reference to FIG. 24. The sediment retention plate 220 is formed by integral molding with a plastic material, and has the same basic structure as the sediment retention plate 120 according to the first embodiment of the present invention shown in FIG. 19. That is, both side portions 220a of the sedimentation retention plate 220 have a shape in which the middle portion is slightly bent outward corresponding to the shape of the conical pedestal of the frame-shaped block unit, and the conical shape of the frame-shaped block unit. It has a wide side shape that is curved so as to be in close contact with the circumference of the pedestal. The vertically long wide part extending up and down on the side is curved in the horizontal direction with respect to the vertical direction so as to be in close contact with the peripheral surface of the pedestal. A curved flange portion 220c is formed. Further, a locking protrusion 220b is formed at the upper and lower ends of the sediment retention plate 220, and a locking recess (not shown) formed in the frame-shaped block unit 115 that sandwiches the upper and lower ends of the sediment retention plate 220. It is designed to match.

Holes 230ab and 240ab that function as rainwater discharge ports are opened on the plate surface of the plastic plate of the sedimentation retention plate 220. More specifically, a pair of hole portions 240ab are opened across the longitudinal center line of the plate surface of the sedimentation retention plate 220, and a pair of hole portions 230ab are opened above and below the hole portion 240ab.

As shown in FIG. 25, the sediment retention plate 220 has the sediment retention plate 220 according to the present invention integrated with the unit block member 123 at the bottom of the sediment retention airspace portion 118, and further, as shown in FIG. 26, It is adapted to fit with a locking recess (not shown) formed in the frame-shaped block unit 115 that sandwiches the upper and lower ends of the sedimentation plate 220. Such units are connected to form a stormwater storage and infiltration facility 205 as shown in FIG. 27.

The sediment retention plate 220 having the holes 230ab and 240ab opened is assumed to be installed on the outermost side of the rainwater storage and infiltration facility 205, and the rainwater stored in the rainwater storage and infiltration facility 205 is stored in the rainwater. It has a function of gradually releasing while infiltrating the outside of the infiltration facility 205. In this case, the rainwater storage and infiltration facility 205 may be covered with a non-woven fabric in order to control the amount of rainwater infiltration.

102 Inflow reservoir 104 Inflow pipe 105 Rainwater storage and infiltration facility 110 Top surface 115 Frame-shaped block unit 111 Earth filling 112 Underground 113, 116 Outflow pipe 114 Outflow reservoir 115 Frame-shaped block unit 117 Overflow pipe 118 Sediment retention airspace 120 Sediment retention Plate 120a Side part of sediment retention plate 120b Locking protrusion at the upper and lower ends of sediment retention plate 120c Flip part on the side of sediment retention plate 122 Inspection port 205 Rainwater storage and infiltration facility 220 Sand sediment retention plate 220a Sedimentation Side part of the retention plate 220b Locking protrusion at the upper and lower ends of the sediment retention plate 220c The flange on the side of the sediment retention plate

Claims (10)

A sediment retention plate of a rainwater storage and infiltration facility in which the corners of the upper and lower plates are connected by pedestals, and a plurality of frame-shaped block units in which the pedestals are divided into two upper and lower bodies are spread underground. There,
A sediment retention plate of a rainwater storage and infiltration facility having a side edge portion in close contact with the side surface of the pedestal and being fitted between the adjacent pedestals. The first aspect of the present invention is characterized in that a vertically long wide portion in close contact with the side surface of the pedestal is formed on the side edge portion, and a flange portion in close contact with the side surface of the pedestal is formed on the vertically long wide portion. The sediment retention board of the rainwater storage and infiltration facility described. The pedestal of the frame-shaped block unit has a circular cross section and a reduced diameter toward the central portion in the length direction thereof, and the retaining plate side edge portion has the frame shape over the entire length. The sediment retention plate of the rainwater storage and infiltration facility according to claim 1 or 2, wherein the block unit has a shape that is in close contact with the side surface of the pedestal. It has a side edge portion that is in close contact with each side surface of the pedestal adjacent to the frame-shaped block unit, and an upper and lower end portions that are in close contact with the upper and lower surface plates of the frame-shaped block unit and are sandwiched between the upper and lower face plates. The sediment retention plate of the rainwater storage and infiltration facility according to any one of claims 1 to 3, wherein a locking convex portion that fits with the locking concave portion of the upper and lower face plates is formed at the upper and lower end portions. The sediment retention plate of the rainwater storage and infiltration facility according to any one of claims 1 to 4, wherein the sediment retention plate of the rainwater storage and infiltration facility is formed of a plastic plate. The rainwater according to any one of claims 1 to 5, wherein the sedimentation retention plate of the rainwater storage and infiltration facility is formed of a plastic plate, and a hole is opened in the plastic plate. Sediment retention board of storage infiltration facility. Rainwater storage and infiltration consisting of multiple frame-shaped block units in which the corners of the rectangular upper and lower face plates are connected by pedestals and the pedestals are divided into two upper and lower bodies in the X and Y directions. At the facility
The frame-shaped block unit spread in the X and Y directions is partially removed, and the surrounding area is surrounded by the frame-shaped block unit in the sediment-retaining airspace portion and above the sediment-retaining airspace portion. It has an inspection opening formed, a rainwater inflow portion communicating with the sedimentation retention airspace portion, and a water storage outflow portion provided at the other end of the facility.
The side portion of the frame-shaped block unit that surrounds the sediment retention airspace is blocked by the sediment retention plate.
The sediment retention plate has a side edge portion in close contact with the side surface of the pedestal, and is fitted between the adjacent pedestals so that the side portion of the frame-shaped block unit is closed. A rainwater storage and infiltration facility characterized by being. In the sedimentation retention plate, a vertically long wide portion that is in close contact with the side surface of the pedestal is formed on the side edge portion, and a flange portion that is in close contact with the side surface of the pedestal is formed on the vertically long wide portion. The rainwater storage and infiltration facility according to claim 7. The pedestal of the frame-shaped block unit has a circular cross section and a reduced diameter toward the central portion in the length direction, and the sediment retention plate has a side edge portion thereof. The rainwater storage and infiltration facility according to claim 7 or 8, wherein the frame-shaped block unit has a shape that is in close contact with the side surface of the pedestal over the entire length. The sediment retention plate has side edges that are in close contact with each side surface of the pedestal adjacent to the frame-shaped block unit, and upper and lower ends that are in close contact with the upper and lower plates of the frame-shaped block unit and are sandwiched between the upper and lower face plates. The rainwater storage and permeation according to any one of claims 7 to 9, wherein a locking convex portion is formed at the upper and lower end portions so as to be fitted with the locking concave portion of the upper and lower face plates. institution.

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