JP5366259B2 - Rainwater storage facility - Google Patents

Description

  The present invention relates to a rainwater storage facility provided under a ground such as a park, a parking lot, or a road.

  Conventionally, rainwater storage facilities have been provided under road surfaces such as parks and parking lots to prevent flooding of rivers and sewers due to heavy rain while allowing accumulated rainwater to be used as needed. As such a rainwater storage facility, for example, as described in Patent Document 1, a water storage tank whose bottom surface is formed in a rainwater induction inclined surface by digging the ground is provided, and rainwater is stored in the water storage tank. A rainwater storage part is formed by laying a filling body having an internal space for storing the water vertically and horizontally and stacking in a plurality of stages, the rainwater storage part is covered with a laminated covering material such as a sheet material or a paving material, and A sand drain groove communicating with the bottom of the manhole is provided on the lower inclined end side of the guide inclined surface. During heavy rain, rainwater is introduced and stored in the rainwater storage section, while the rainwater in the storage section is discharged. At that time, earth and sand, mud, etc. (hereinafter referred to as sand) that has flowed into the reservoir together with rain water flow down on the above-mentioned guiding inclined surface on the bottom of the tank and are introduced into the manhole through the sand removal groove. The sand as well as discharged to the parts settle to the bottom of the manhole, is deposited, rainwater storage facility is known which is configured to exclude from the manhole by vacuum device or the like.

  Further, Patent Document 2 forms a water storage tank in which a U-shaped side groove is provided at the center of the bottom surface by digging the ground, and an inclination for guiding rainwater toward the U-shaped side groove on the bottom surface of the water storage tank. A large number of first filling members having plate portions are stacked in multiple rows and multiple stages, and a second filling member that stores rainwater on the uppermost first filling member via a partition plate is stacked in another row and multiple stages. 2 The covering member is covered with a covering material, while the end of the U-shaped side groove communicates with the bottom of the manhole, and rainwater in the second filling member is U-shaped together with sand etc. by the inclined plate portion of the first filling member. A rainwater storage facility is described that is configured to be guided to a side groove and to remove sediments such as sand accumulated in the U-shaped side groove through a manhole through a vacuum device and a washing water injection pipe having an injection nozzle.

JP 2006-342520 A JP 2004-52243 A

  However, according to the former rainwater storage facility, as a means for introducing rainwater in the rainwater storage portion composed of a large number of fillers for storing rainwater into the bottom of the manhole together with sand contained in the rainwater, Since the bottom surface is formed by a guide inclined surface that is inclined downward toward the manhole, forming the bottom surface of the water storage tank in such an inclined surface not only requires significant labor and labor, but also vertically and horizontally. The thickness of all the packings at the lowest stage in the array is formed so that the thickness is gradually increased in the direction of the inclined surface as the inclined surface becomes lower. It is necessary to make it possible to arrange the upper packing bodies having thicknesses in the vertical and horizontal directions, and there is a problem that the structure becomes complicated and the cost is high and the construction cost is high.

  On the other hand, according to the latter rainwater storage facility, the same size and shape of the first filling member (hereinafter simply referred to as the filling member) having a constant thickness by forming the bottom surface of the water storage tank in a flat horizontal plane are arranged side by side. However, since the means for depositing the sand contained in the rainwater is formed by the U-shaped groove provided in the center of the bottom of the water storage tank, such a U-shaped groove is excavated in the groove bottom. In order to make the surface waterproof together with the bottom of the groove, it requires considerable labor and labor like the former rainwater storage facility, and the U-shaped side groove is provided in advance at the bottom of the water storage tank. Therefore, when constructing the filling member, it must be constructed while confirming whether the inclination direction of the inclined plate portion is directed to the U-shaped side groove side, and when connecting the filling member vertically and horizontally , Rainwater, sand, etc. from the lower inclined end of the inclined plate part into the U-shaped side groove Order not to be taken as the output can structure, there is a problem that the structure is time-consuming to complicated similarly to the above construction.

  Furthermore, in the case of a small-scale rainwater storage facility, a single U-shaped groove is provided at the center of the bottom surface of the water storage tank, and the filling members are arranged in a line along both sides of the U-shaped groove. Therefore, sand contained in rainwater can be smoothly introduced into the U-shaped side groove from the inclined plate portion of these filling members, but in the case of a large-scale rainwater storage facility with a large area, In the U-shaped side groove, since it is necessary to arrange the filling members in parallel on both sides, sand is introduced to the U-shaped side groove along the inclined plate portion of the filling member arranged on the outside. As a result, there is a possibility that sand may remain and accumulate on the inclined plate portion of the filling member, and sand may be clogged at the connecting portion between adjacent filling members.

  For this reason, several U-shaped side grooves must be provided in parallel at regular intervals, and filling portions must be provided on both sides of each U-shaped side groove. Further, a manhole is provided corresponding to each U-shaped side groove. There is a problem that the construction of the rainwater storage facility becomes complicated and the construction cost becomes high.

  The present invention has been made in view of the above-described problems. The object of the present invention is to have a simple structure, which can be constructed efficiently and accurately, and even a water tank having a large area. Rainwater induction that can guide rainwater almost uniformly over the entire water storage tank by one water guide groove, and can form the formation pattern of this water guide groove in a form corresponding to the size of the water tank, etc. To provide a rainwater storage facility having a part.

  In order to achieve the above object, according to the rainwater storage facility of the present invention, a plurality of rainwater guidance unit members are juxtaposed vertically and horizontally at the bottom of a water tank formed by excavating the ground. The rainwater storage unit is formed by stacking a rainwater storage unit member having an internal space for storing rainwater on the rainwater induction unit and covering the upper surface of the rainwater storage unit. In the rainwater storage facility which is covered with a material and configured to lead rainwater to the manhole through the rainwater guide part, the rainwater guide part is directed toward the water guide groove part which is refracted in a plane L shape and the water guide groove part. Refractive guidance rainwater guidance unit member provided with an inclined surface for guiding rainwater, a straight guidance provided with a linear water guide groove and an inclined surface for guiding rainwater toward the water guide groove A rainwater guidance unit member is formed, and a series of water guide grooves communicating with the manhole are formed by combining the rainwater guidance unit member for refraction guidance and the rainwater guidance unit member for straight guidance so that the water guide groove portions communicate with each other. It is characterized by.

  In the rainwater storage facility configured as described above, the invention according to claim 2 is the rectangular plate in which the refraction-inducing rainwater-guiding unit member is provided with a bottom peripheral wall portion having a constant height projecting downward from the four-side periphery. In addition, an L-shaped refractive water guide groove communicating between the central portions of the rectangular plates adjacent to each other at right angles is formed, and the upper surface of the rectangular plate is directed downward from the four-side periphery toward the refractive water guide groove. It is characterized by being formed on a gently inclined rainwater-inducing inclined surface.

  Furthermore, the invention according to claim 3 is characterized in that the straight guiding rainwater guiding unit member is of the same size and shape as the rectangular plate of the refraction guiding rainwater guiding unit member, and has a rectangular guiding edge for downward refraction guiding. Provided to the rainwater guidance unit member for refraction guidance at the central part in the length direction or width direction of this rectangular plate on the rectangular plate projecting the bottom circumferential wall portion of the same height as the bottom wall portion of the rainwater guidance unit member A straight water guide groove portion having the same cross-sectional shape as the refractive water guide groove portion is formed, and the upper surface of the rectangular plate is formed into a rainwater induction inclined surface gently inclined downward toward the straight water guide groove portion. To do.

  According to a fourth aspect of the present invention, the lower end of the refraction-inducing rainwater-guiding unit member has a lower end that opens downward from the rectangular plate at regular intervals to a peripheral portion of the rectangular plate and a plate portion along the refractive water guide groove portion. And a partition that is formed with an inclined end surface that guides rainwater toward the rainwater-inducing inclined surface between the opposing lower ends of the adjacent supporting struts. A wall portion is provided, and the invention according to claim 5 is characterized in that a refraction induction is provided in the four-side peripheral portion of the rectangular plate of the straight guidance rainwater guidance unit member and the plate portion along the straight water guide groove portion. A support strut of the same size and shape as this support strut is projected at the same position as the support strut provided in the rainwater guidance unit member, and is opposed in a direction perpendicular to the length direction of the straight water guide groove Invite rain water between the lower ends of the supporting struts Characterized in that is provided with the partition wall portion formed on the inclined end surface for inducing a rainwater toward the inclined surface.

  The invention which concerns on Claim 6 is a rain water storage unit member for forming the rain water storage part in a rain water storage facility, Comprising: This rain water storage unit member is a bottom plate of the same size as the bottom plate of the said rain water guidance unit member. A hollow protrusion having a constant isometric trapezoidal shape with a lower end that is entirely open downward from the bottom plate portion is provided at regular intervals in the width direction or length direction of the bottom plate portion. In addition, at the upper ends of these hollow projections, there are formed projecting tops in the form of a rectangular plane with several through holes communicating with the hollow projections at integral intervals in the length direction of the hollow projections. The lower rainwater storage unit member and the upper rainwater storage unit member are turned at right angles to each other so that the projecting tops of the hollow protrusions of the lower rainwater storage unit member correspond to the corresponding hollow protrusions of the upper rainwater storage unit member. At the lower end opening Characterized in that it configured to form a rainwater reservoir stacked by engaged.

  According to invention of Claim 1, the rainwater guidance | induction part provided in the bottom part of the water storage tank provided the water guide groove part refracted by plane L shape, and the inclined surface which guides rainwater toward this water guide groove part. A refraction guiding rainwater guiding unit member, and a straight guiding rainwater guiding unit member provided with a straight water guiding groove portion and an inclined surface for guiding rainwater toward the water guiding groove portion. The rainwater guidance unit member and the straight guidance rainwater guidance unit member are combined so that the water guide grooves communicate with each other to form a series of water guide grooves that communicate with the manhole. The refraction induction rainwater guidance unit member and the straight guidance rainwater guidance unit member are combined without inclining the bottom surface of the lens toward the manhole or providing a U-shaped groove on the bottom surface. It is possible to easily form a rainwater guiding portion having a water guide groove that guides rainwater to a manhole and an inclined surface that guides rainwater toward this water guide groove by laying on the bottom surface of the water storage tank. Construction can be facilitated and construction costs can be reduced.

  Further, a pattern for connecting the refracting storm water guiding unit members in a state where the refracting water guiding groove portions communicate with each other, and a pattern for connecting the straight guiding storm water guiding unit members in a state where the straight water guiding groove portions are communicated with each other. And a pattern that connects the refraction guide groove portion of the refraction guide rainwater guide unit member and the straight guide groove portion of the straight guide rainwater guide unit member to communicate with each other. In addition, it is possible to form a single water guide groove that is continuous while detouring in a plane U shape or an inverted U shape, and a single water guide groove that is continuous while detouring in a spiral shape, Regardless of the size, it is possible to form a bypass water guide groove in which the water guide groove portion is uniformly arranged over the entire surface of the bottom of the water storage tank. In addition, the straight guiding rainwater guiding unit member is provided with an inclined surface for guiding rainwater toward the water guiding groove portion together with the water guiding groove portion. Therefore, the distance of the inclined surface for guiding sand contained in rainwater to the water guiding groove portion is small. It can be short, and can smoothly and reliably flow into the water guide groove portion together with rain water without causing sand or the like to remain or accumulate on these rain water guiding unit members.

  The refraction-inducing rainwater-guiding unit member and the straight-guiding rainwater-guiding unit member are combined so that the water guide grooves communicate with each other, and the single U-shaped, inverted U-shaped, or spirally detoured. That is, since one water guide groove is formed, it is only necessary to provide a manhose for receiving rainwater discharged through this water guide groove at one place even if the water storage tank is wide, and the water guide groove communicated with the manhole. The position of the open end can be arranged at a desired position by changing the water guide groove forming pattern.

  According to the second aspect of the present invention, the refraction-inducing rainwater guiding unit member is formed on a rectangular plate having a bottom peripheral wall portion having a fixed height projecting downward from the four-side periphery at a right angle to the rectangular plate. An L-shaped refracting water guide groove that communicates between the central portions of adjacent sides is formed, and the upper surface of the rectangular plate is formed into a rainwater induction inclined surface that is gently inclined downward from the four-side periphery toward the refracting water guide groove. Since it is formed, by combining this refraction guiding rainwater guiding unit member, it is possible to easily and accurately form a folded water channel, a stepped water channel, and the like. Since the rainwater guiding inclined surface toward the water guiding groove is integrally provided with the groove, the rainwater containing sand can be smoothly passed through the rainwater guiding inclined surface regardless of the pattern of the water guiding groove. Inflow It can be.

  According to a third aspect of the present invention, the straight guiding rainwater guiding unit member has a rectangular plate having the same size and shape as the rectangular plate of the refraction guiding rainwater guiding unit member. A straight water guide groove portion having the same cross-sectional shape as the refractive water guide groove portion provided in the refraction guide rainwater guide unit member is formed in the central portion in the width direction. In addition to being able to form straight water guide grooves, various patterns of water guide grooves that circulate while being refracted back and forth and left and right can be formed by combining with the above-described storm water guiding unit member for refraction induction. The rectangular plate of the straight guiding rainwater guiding unit member has the water guiding groove portion and the straight guiding groove portion in the same manner as the refraction guiding rainwater guiding unit member. The rainwater-inducing inclined surface that is gently inclined in the direction is integrally formed, so that whatever pattern of water-groove is formed, rainwater including sand flows smoothly through the rainwater-inducing inclined surface. Can be made.

  In addition, a bottom peripheral wall portion with a fixed height is provided on the four peripheral edges of the refraction guiding rainwater guiding unit member and the straight guiding rainwater guiding unit member. The rainwater guiding unit member for straight water and the rainwater guiding unit member for straight guiding can be accurately installed in a stable state on the bottom surface of the water storage tank, and the loaded load from the rainwater storage unit member stacked on the rainwater guiding unit member Can be firmly received.

  According to the invention which concerns on Claim 4 and Claim 5, the four-way periphery part of the rectangular plate of the said storm water guidance unit member for refraction | guidance | derivation induction | guidance | derivation and the rain water guidance | induction unit member for straight induction | guidance | derivation, a refractive water guide groove part, and a straight water guide groove part Since a hollow supporting column having a fixed height with a lower end opened downward from the rectangular plate at a certain interval is projected from the plate portion along the guide unit member and the guiding unit member on the supporting column. By supporting a rectangular partition plate having many water holes of the same size and the same shape, the refraction guiding rainwater guiding unit member and the straight guiding rainwater guiding unit member arranged vertically and horizontally are interposed via the partition plate. The rainwater storage unit members can be easily and stably stacked, and the upper end surface of the guide unit members faces the rainwater induction inclined surface between the opposite lower ends of the adjacent support columns. Since the partition wall portion formed on the inclined end surface for guiding rainwater is provided, the inclined surface formed on the upper surface of the rectangular plate by this partition wall portion is divided into a plurality of rainwater induction inclined surfaces toward the water guide groove portion. Rainwater can be accurately guided toward the water guide groove by the divided rainwater guiding inclined surface.

  According to the sixth aspect of the present invention, the rainwater storage unit member has the same height as the rectangular plate of the rainwater guidance unit member, and the bottom plate portion having the same shape has a lower end that is fully open downward from the bottom plate portion. The hollow projections having a trapezoidal shape in cross section projecting at regular intervals, and communicating with the upper ends of these hollow projections in the hollow projections at integral intervals in the length direction of the hollow projections It has a flat rectangular protruding top with several through-holes, and the lower storm water storage unit member and the upper storm water storage unit member are turned at right angles to each other so that the lower storm water storage unit member Since it is configured to be stacked by fitting the projecting top of each hollow protrusion to the lower end opening of each corresponding hollow protrusion of the upper rainwater storage unit member, between the rainwater storage unit members adjacent to each other vertically The overlapping part is the pole It is possible to provide a large rainwater storage unit member of reservoir porosity rainwater less Te, rainwater induction unit member can be stably stacked state.

  In the present invention, the rainwater storage unit member is not limited to the above-described configuration, and includes a rainwater guidance unit member formed by arranging a cylindrical member of a certain height vertically and horizontally, a rainwater guidance unit member formed in a grid shape, and the like. Can be adopted.

A simplified longitudinal side view of a rainwater storage facility. The enlarged front view of the state which has piled up the rainwater storage part on the rainwater guidance part. The perspective view of the rainwater guidance unit member for refraction guidance. The front view. FIG. 4 is a longitudinal sectional front view taken along line AA in FIG. FIG. 4 is a longitudinal sectional front view taken along line BB in FIG. 3. The perspective view of the rainwater guidance unit member for straight guidance. The front view. FIG. 8 is a longitudinal sectional front view taken along line A′-A ′ in FIG. 7. B'-B 'line longitudinal front view in FIG. The top view which shows an example of the combination pattern of the rain water guidance unit member for refraction | bending guidance, and the rain water guidance unit member for straight guidance. The top view which shows one Example of a rainwater guidance | induction part. The top view which shows another Example of a rainwater guidance | induction part. The top view which shows a modification. The perspective view of the state which attached the partition plate on the rain water guidance unit member. The perspective view of a rainwater storage unit member. The longitudinal section front view of the state which has accumulated. The perspective view which shows the modification of the rainwater guidance unit member for refraction | bending guidance.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, a rainwater storage facility will be described later on the bottom surface of a water tank 1 formed by digging the ground of a park or the like. In addition, the rainwater guidance unit member 10 for refraction induction having a certain height (thickness) having a flat rectangular shape and the rainwater guidance unit member 20 for direct guidance are combined in combination with a plurality of adjacent rainwater guidance unit members. The rainwater guiding portion 2 is formed by arranging and installing the opposing end surfaces of the guiding unit member side by side in the vertical and horizontal directions.

  Furthermore, the rain water storage unit member row of the first stage (the lowest stage) is formed by laying down the rain water storage unit members 30 having a flat rectangular shape and having a fixed height vertically and horizontally with an internal space for storing rain water on the rain water guiding portion 2. The rainwater storage unit member row of the second stage is formed by laying the rainwater storage unit members 30 of the same size and shape on the rainwater storage unit member row in the vertical and horizontal directions, and a plurality of the rainwater storage unit member rows are formed. The rainwater storage part 3 is formed by stacking steps, the rainwater storage part 3 is covered with a covering material 4 whose upper surface is formed on a paved road surface, and a bottom portion is provided on one end side of the rainwater storage part 3. Is provided with a manhole 5 positioned below the lower end of the rainwater guiding portion 2, and an opening end of a water guide groove 6 described later provided in the rainwater guiding portion 2 is communicated with the bottom of the manhole 5. Structure. The rainwater guidance unit members 10 and 20 and the rainwater storage unit member 30 are molded products made of synthetic resin.

  In addition, the rainwater storage unit member 30 may be stacked directly on the rainwater guidance unit members 10 and 20, but as shown in FIGS. 2 and 15, the rainwater guidance unit members 10 and 20 penetrate vertically. A partition plate 7 having a large number of water passage holes 7 a is attached, and a rainwater storage unit member 30 is installed on the partition plate 7.

  The water storage tank 1 covers the water shielding sheet 8 from the bottom surface of the recessed portion formed by excavating the ground over a predetermined depth to a predetermined depth and covers the entire surface of the four excavated wall surfaces, and excavates as necessary. A concrete foundation 9 is formed on the bottom surface, and the entire bottom surface is formed in a horizontal plane.

  The rainwater guiding portion 2 formed on the bottom surface of the water storage tank 1 is composed of a combination of a plurality of refraction guiding rainwater guiding unit members 10 and a straight guiding rainwater guiding unit member 20, and a refraction guiding rainwater guiding unit. As shown in FIGS. 3 to 6, the member 10 has a rectangular plate 11 in which the lengths of the four sides are formed in the same dimension, and the plate portion extending between the central portions of adjacent sides at right angles is recessed downward. By doing so, an L-shaped refractive water guide groove 6A having a constant width is formed. Specifically, grooves 6A1 and 6A2 having a constant width and depth are formed from the central part of one side of rectangular plate 11 and the central part of one side adjacent to this side toward the central part of rectangular plate 11, respectively. At the same time, these groove portions 6A1 and 6A2 are connected at a right angle at the central portion of the rectangular plate 11 to form an L-shaped refractive water guiding groove portion 6A having both ends opened to the outside from the sides adjacent to the rectangular plate 11 at right angles. ing.

  Further, the rain water guiding inclined surface 12 in which the upper surface of the rectangular plate 11 is gently inclined downward from the sides facing the groove portions 6A1 and 6A2 of the L-shaped refractive water guiding groove portion 6A in parallel to the groove portions 6A1 and 6A2, respectively. Is formed. Specifically, the rectangular plate 11 is slightly refracted upward from the both ends in the groove width direction of the groove portions 6A1 and 6A2 of the refracting water guiding groove portion 6A toward the sides facing the both side ends in parallel. A rainwater guiding inclined surface 12 is formed. Further, a bottom peripheral wall portion 13 having a fixed height is projected downward from the four-side periphery of the rectangular plate 11 and reinforcing ribs 14 are provided on the outer bottom surface (lower surface) of the rectangular plate 11 in parallel with the bottom peripheral wall portion 13. These bottom peripheral wall portions 13 of the refractory guidance rainwater guiding unit member 10 are arranged so that the lower end surfaces of the bottom peripheral wall portions 13 and the lower end surfaces of the reinforcing ribs 14 are positioned on the same horizontal plane. When the reinforcing rib 14 is grounded and the rain guiding unit member 10 for refraction induction is installed on the bottom surface of the water storage tank 1, the refraction guide groove portion 6A is arranged horizontally.

  Further, a hollow with a constant height whose lower end is opened downward from the lower surface of the rectangular plate to the four corners of the rectangular plate 11 and the sides between the four corners and the plate portion along the refractive water guide groove 6A. The support pillar 15 having a truncated pyramid shape is projected. Specifically, support struts 15 are projected from the four corners of the rectangular plate 11 and positions where each side of the rectangular plate 11 is divided into three equal parts, and support is provided so as to project each side into three equal positions. Support struts 15 are projected along the refracted water guide groove 6A on the four sides of the central portion of the rectangular plate 11 with respect to the struts 15, and the spacing between the support struts 15 adjacent to the front, rear, right and left is made equal. Yes. Further, a partition plate locking projection 15a is provided at the center of the upper end surface of all the support columns 15, and a small-diameter hole 15b communicating with the partition plate is provided in the partition plate locking projection 15a. ing. All the support columns 15 are formed so that the height from the lower end surface of the bottom peripheral wall portion 13 is equal.

  In addition, the opposing surfaces of the lower ends of the support columns 15 and 15 of each pair projecting from the sides and corners of the rectangular plate 11 with the open ends of the grooves 6A1 and 6A2 communicating at right angles with each other in the refractive water guide groove 6A A partition wall portion 16 formed on the inclined end surface 16a that guides rainwater toward the rainwater induction inclined surface 12 is provided between the grooves 6A1 and 6A2 in the lengthwise direction and communicated at right angles. A partition wall portion 16 ′ having an upper end surface formed on an inclined end surface 16a ′ that guides rainwater toward the rainwater induction inclined surface 12 is also provided between the opposing surfaces of the inner and outer support struts 15 and 15 toward the inner surface.

  On the other hand, the straight guidance rainwater guidance unit member 20 has a rectangular plate 21 having the same size and the same shape as the rectangular plate 11 of the refraction guidance rainwater guidance unit member 10, as shown in FIGS. Further, a straight water guide groove portion 6B having the same width and the same depth as that of the refractive water guide groove portion 6A, that is, the same cross-sectional shape, is formed over the entire length (full width) between the central portions of the sides opposite to each other of the rectangular plate 21. Are formed by indenting the plate portion of the rectangular plate 21 downward, and the both sides of the rectangular plate 21 provided so as to sandwich the straight water guide groove portion 6B from the straight water guide groove portion 6B to the straight water guide groove portion. By slightly refracting upward toward the side corresponding to 6B in parallel, the upper surface of both sides of the rectangular plate 21 is made into a rainwater induction inclined surface 22 gently inclined downward from these sides toward the straight water guide groove 6B. Forming.

  Further, a bottom peripheral wall portion 23 having the same height as the bottom peripheral wall portion 13 of the refraction-inducing rainwater guiding unit member 10 protrudes downward from the four-side periphery of the rectangular plate 21 and the outer bottom surface of the rectangular plate 21 ( Reinforcing ribs 24 project downward from the lower surface in parallel to the bottom peripheral wall portions 23, and the lower end surfaces of the bottom peripheral wall portions 23 and the lower end surfaces of the reinforcing ribs 24 are located on the same horizontal plane. In this way, when the straight guiding rainwater guiding unit member 10 is installed on the bottom surface of the water storage tank 1 with the bottom peripheral wall portion 23 and the reinforcing rib 24 of the straight guiding rainwater guiding unit member 20 grounded, The water guide groove 6B is arranged horizontally with the same height as the refractive water guide groove 6A.

  Further, the four corners of the rectangular plate 21 of the straight guidance rainwater guidance unit member 20 at the same position as the plurality of support columns 15 projecting from the refraction guidance rainwater guidance unit member 10 and the four corners are provided. A hollow wharf having the same height and the same shape as the support column 15 whose lower end is opened downward from the lower surface of the rectangular plate to the side of the plate and the plate portion along the straight water guide groove portion 6B. A pyramid-shaped support column 25 is projected. Specifically, support struts 25 project from the four corners of the rectangular plate 21 and the positions at which each side of the rectangular plate 21 is divided into three equal parts, and this straight line along both side ends of the straight water guide groove 6B. Support struts 25 are provided at positions that divide the length of the water guide groove portion 6B into three equal parts, and the intervals between the support struts 25, 25 adjacent to the front, rear, left, and right are all equal. Furthermore, a partition plate locking projection 25a is provided at the center of the upper end surface of all the support columns 25, and a small diameter hole 15b communicating with the partition plate is provided in the partition plate locking projection 25a. ing. All the support columns 25 are formed so that the height from the lower end surface of the bottom peripheral wall portion 23 is equal.

  In addition, the upper end surface is formed on the inclined end surface 26a that guides rainwater toward the rainwater induction inclined surface 22 between the opposing surfaces of the lower end portions of the inner and outer support struts 25, 25 facing the inclined direction of the rectangular plate 21. Partition walls 26 are provided, and the rainwater guiding inclined surface 22 is divided into three equal parts by these partition walls 26.

  The bottom surface of the water storage tank 1 is configured by arranging and installing the refraction-inducing rainwater-guiding unit member 10 and the straight-guiding rainwater-guiding unit member 20 configured as described above in parallel in the vertical and horizontal directions (front and rear, left and right). The rainwater guiding part 2 whose one end communicates with the bottom of the manhole 5 is formed on the upper side. As a combination pattern of the refraction-inducing rainwater guiding unit member 10 and the straight guiding rainwater guiding unit member 20, A combined pattern for connecting the refraction guide rain water guiding unit members 10 and 10 so that the refraction water guiding groove portions 6A and 6A that are opposed to each other communicate with each other, and the straight guiding rain water guiding unit members 20 and 20 are connected to the straight water guide groove portion 6B. , 6B are connected so that they communicate with each other in a straight line, and as shown in FIG. 11, the bending-induced rainwater guiding unit member 10 and the straight guiding rainwater-guiding unit member 20 are bent. Water guide groove 6A and the straight water guide groove 6B there is a combination pattern connecting in communication.

  A plurality of refraction-inducing rainwater guiding unit members 10 and straight guiding rainwater-inducing unit members 20 are arranged vertically and horizontally on the inner bottom surface of the water storage tank 1 excavated in the ground using these three combination patterns ( By arranging in parallel in the front / rear / left / right direction, the rainwater guiding portion 2 is formed in which one water guide groove 6 whose one end communicates with the manhole 5 is provided in a flat stroke. For example, when the manhose 5 side is the front side, as shown in FIG. 12, a plurality of straight guidance rainwater guidance unit members 20, 20, 20,. The straight water guide groove 6B is connected and installed in the front-rear direction so as to communicate with each other in a straight line, and the straight water guide groove 6B of the foremost direct guidance rainwater guidance unit member 20 is communicated with the bottom of the manhose 5 and finally The straight guiding rainwater guiding unit member 20 is placed on the straight guiding rainwater guiding unit member 20 and the groove 6A1 of the refracting water guiding groove portion 6A is directed forward to the straight shape of the straight guiding rainwater guiding unit member 20. It connects in the state connected to the water guide groove part 6B.

  Further, the refracting guidance rainwater guiding unit member 10 is disposed on the other side surface of the rear end of the water storage tank 1, and one of the grooves 6A1 of the refractive water guiding groove 6A is disposed on one side of the rear end of the water storage tank 1. The storm water guiding unit member 10 for the refracting water guiding unit 10 is installed in a state where it is straightly opposed to the other groove portion 6A2 of the refracting water guiding groove portion 6A. The straight water guide groove 6B directed in the left-right direction of the straight guiding rainwater guiding unit member 20 with the intervening 20 is communicated with the opposed grooves 6A1 and 6A2 of the refraction guiding rainwater guiding unit members 10 and 10, respectively. Connect and install as you like.

  Similarly, the refracting guidance rainwater guiding unit member 10 is disposed on the other side surface of the front end of the water storage tank 1, and the groove 6A1 of the refractive water guiding groove 6A is disposed on the other side surface of the rear end of the water storage tank 1. The storm water guiding unit member 10 is installed in a state where it is opposed to the other groove portion 6A2 of the refracting water guiding groove portion 6A in a straight line. The guiding unit members 20 are connected in a longitudinal state with the straight water guiding groove portions 6B communicating with each other in the front-rear direction, and the front and rear opening ends of the straight water guiding groove portions 6B are opposed to the opposing refraction guiding rain water guiding unit members 10 described above. , And 10 grooves 6A1 and 6A2 are installed so as to communicate with each other.

  Furthermore, one groove portion 6A1 is connected to the other groove portion 6A2 of the refraction guide groove portion 6A of the refraction guide rainwater guiding unit member 10 installed on the other side surface side of the front end portion of the water tank 1, and the center portion of the front end of the water tank 1 is connected. In addition, a refraction-inducing rainwater-guiding unit member 10 is installed at the same time, and the straight-shaped guiding water groove 6B is also formed between the above-described straight-guiding rainwater-guiding unit members 20 and 20 arranged in tandem on both sides of the water tank 1. Are installed in a state where a plurality of straight guidance rainwater guidance unit members 20, 20 arranged in a row in communication with each other are interposed. By connecting the front end of the straight water guiding groove portion 6B of the guiding unit member 10 to the other groove portion 6A2 opened toward the rear of the refraction guiding rainwater guiding unit member 10 installed in the central portion of the front end of the water storage tank 1, A series of refractions It can be a water groove 6A and straight water guide groove 6B forms a water guide groove 6 without passing helically along the bottom surface of the water storage tank 1 from the manhole 5 side.

  In this rainwater guiding section 2, refraction guiding rainwater guidance is provided between the rows of the refraction guiding rainwater guiding unit members 10 and the straight guiding rainwater guiding unit members 20 that are installed in columns on both sides of the water storage tank 1. Although the unit member 10 and the straight guidance rainwater guidance unit member 20 are arranged in a single row, two or more rows may be arranged, and in that case, the water guide groove 6 further bypassing in a spiral shape is provided. It is possible to form the water guiding grooves 6 in which the number of the refracting portions, that is, the spiral winding state increases.

  Further, not only the water guide groove 6 that spirally detours on the bottom surface of the water storage tank 1, but also a water guide groove 6 that detours back and forth and right and left can be formed in a zigzag shape or as shown in FIG. 13 has a manhole 5 at one corner of the front end of the water storage tank 1, and a plurality of straight shapes from the manhole 5 along the one side wall surface toward the rear. Direct guidance other than the direct guidance rainwater guidance unit member 20 connected and installed to the manhole 5 while connecting and installing the guidance rainwater guidance unit member 20 with the straight water guide grooves 6B and 6B communicating with each other in the front-rear direction. The rainwater guidance unit member 20 row for water is arranged in a state where one side surface of the next 20 rows of rainwater guidance unit members 20 for straight guidance is joined, and after these 20 rows of rainwater guidance unit members 20 rows for straight guidance Between the rear ends of the rainwater guidance unit members 20 and 20 for straight-line guidance are connected to the left and right along the rear end wall surface of the water storage tank 1 and connected by a pair of refraction guidance rainwater guidance unit members 10 and 10 installed. The straight shape of rainwater guidance unit members 20 and 20 for both straight guidance The rear end openings of the water guide grooves 6B and 6B are communicated with each other by the refractive water guide grooves 6A and 6A in the refraction guide rainwater guidance unit members 10 and 10 communicated in a U-shape.

  Similarly, one side surface of the next 20 straight guiding rainwater guiding unit members 20 row is joined to the other side surface of the straight guiding rainwater guiding unit member 20 row near the center, and the straight guiding rainwater guiding unit member Rainwater guidance unit member 20 for direct guidance so that one side surface of 20 rows of straight rainwater guidance unit members 20 arranged along the other side wall surface of water storage tank 1 is joined to the other side surface of 20 rows. Is placed on the bottom surface of the water tank 1 and the front end of the straight guiding rainwater guiding unit members 20 and 20 in the frontmost part of the 20 rows of straight guiding rainwater guiding unit members 20 adjacent in the center is refracted in the same manner as described above. The water guide grooves 6A and 6A are connected by a pair of left and right refraction guide rainwater guidance unit members 10 and 10 combined in a U-shape, and the opening front ends of the straight water guide grooves 6B and 6B communicate with the refractive water guide grooves 6A and 6A. And along the other side wall surface of the water storage tank 1 In the same manner as described above, the rear end of the straight guidance rainwater guidance unit member 20 row and the straight guidance rainwater guidance unit member 20 row parallel to the straight guidance rainwater guidance unit member row 20 are arranged in the same manner as described above. Are connected by a pair of left and right refraction guiding rainwater guiding unit members 10 and 10 that are combined in a U shape, and the front opening ends of the straight water guiding groove portions 6B and 6B are connected to the refraction guiding groove portions 6A and 6A. Communicating with

  Further, the straight guiding rainwater guiding unit member 20 on the foremost end side of the straight guiding rainwater guiding unit member 20 arranged along the other side wall surface of the water storage tank 1 is connected to the refraction guiding rainwater guiding unit member 10. To connect one groove 6A1 of the refractive water guiding groove 6A to the straight water guiding groove 6B of the direct guidance rainwater guiding unit member 20 and to the other groove 6A2 of the refractive water guiding groove 6A opened in the manhole direction. A plurality of straight guiding rainwater guiding unit members 20 connected in the left-right direction to each other are communicated with the other open ends of the straight water guiding groove portions 6B connected in a state of facing each other in the left-right direction. By connecting one open end of the water guide groove portion 6B to the bottom of the manhole 5, the series of refractive water guide groove portions 6A and the straight water guide groove portion 6B refract in the front-rear and left-right directions and both ends communicate with the manhole 5 One water guide groove 6 It is possible to form the rainwater guiding portion 2.

  As shown in FIG. 15, on the upper surfaces of all the refraction-inducing rainwater-guiding unit members 10 and the straight-guiding rainwater-guiding unit members 20 forming the rainwater-guiding unit 2 as described above, A partition plate 7 having the same shape and the same size as the members 10 and 20 and having a plurality of water passage holes 7a in the vertical direction and having a constant thickness is attached. A rainwater storage unit member 30 is mounted on the partition plate 7. The rain water storage part 3 is formed by stacking. The partition plate 7 has a locking hole 7b fitted and engaged with the partition plate locking projection 15a of the support column 15 protruding from the guide unit members 20 and 30 on the lower surface thereof. The partition plate 7 is superposed on the guidance unit members 10 and 20 by locking the locking holes 7b to the partition plate locking projections 15a.

  As shown in FIGS. 16 and 17, the rainwater storage unit member 30 constituting the rainwater storage unit 3 has a bottom plate 31 having the same size and the same shape as the rectangular plates 11 and 21 of the guide unit members 10 and 20. A hollow projection 32 having a constant height cross-section with a constant height and penetrating through the bottom plate 31 is opened over the entire length (full width) at regular intervals in the front-rear direction or the left-right direction. The projecting top 34 is formed in the length direction of the hollow projection 32 by projecting several through holes 33 communicating with the hollow projection 32 on the upper end surface of the hollow projection 32. The protrusions 34 are formed at the same intervals as the protrusions 32, and the protrusion tops 34 are formed in a planar rectangular shape whose length direction is directed to the length direction of the hollow protrusions 32, and the hollow protrusions The width of the opening between the lower ends of the opposing inclined walls facing each other with a narrow gap of the portion 32 is set so that the protruding top portion 34 extends across the protruding top portion 34 in the length direction. It is formed to the width that can fit.

  As shown in FIGS. 1 and 2, the rainwater storage unit member 30 configured as described above is mounted on all the rainwater guidance unit members 10 and 20 forming the rainwater guidance unit 2 via the partition plate 6. The rainwater storage unit member row arranged vertically and horizontally in the same manner as the rainwater guidance unit members 10 and 20, and the rainwater storage unit member row is stacked as a first stage, and the rainwater storage unit member row is stacked. The storage part 3 is comprised. At this time, as shown in FIG. 17, the lower rainwater storage unit member 30 and the upper rainwater storage unit member 30 installed on the rainwater storage unit member row change the direction perpendicular to each other in the plane direction. The hollow projection 32 of the upper rainwater storage unit member 30 intersects the hollow projection 32 of the upper rainwater storage unit member 30, and the lower open end surface of the upper hollow projection 32 is the lower rainwater reservoir. The hollow projection portion of the upper rainwater storage unit member 30 on the upper surface of the hollow projection portion 32 of the lower rainwater storage unit member 30 in a state of being fitted to the projecting top portion 34 protruding from the hollow projection portion 32 of the unit member 30 The lower end surface of 32 openings is received.

  Furthermore, the entire upper surface of the uppermost rainwater storage unit member row in the rainwater storage section 3 is covered with a covering material 4 via a partition plate 7 '. The covering material 4 is formed by covering the top surface of the rainwater guiding portion 3 with a water shielding sheet 41 and providing an asphalt pavement layer 43 on the water shielding sheet 41 with a gravel layer or earth and sand layer 42 interposed therebetween. Alternatively, a water-permeable sheet may be used in place of the water-impervious sheet 41, and a water-permeable pavement layer is provided on the water-permeable sheet via an earth and sand layer, etc., and rainwater penetrates into the rainwater storage unit 3 during rainfall. You may comprise so that it may make it.

  In addition, rainwater from a side groove or the like provided on the shoulder of a road or the like is supplied into the manhole 5 at the upper end portion of the manhole 5 where the opening end of the water guiding groove 6 in the rainwater guiding portion 2 communicates with the bottom. A water guide pipe 50 is communicated, and a discharge pipe 51 for discharging a certain amount of rainwater to the outside via an orifice or the like is provided below the water guide groove 6 at the bottom of the manhole 5 through an orifice or the like.

  With this configuration, rainwater that has flowed into the manhole 5 at the time of rainfall is filled in the bottom of the manhole 5, and a large amount of rainwater is discharged from the manhole 5 through the lead-out pipe 51, depending on the amount of rain discharged to the outside. When flowing into the manhole 5, a series of refracting water guiding grooves forming the water guiding groove 6 over the entire length of the water guiding groove 6 by flowing into the water guiding groove 6 facing the bottom of the manhole 5. 6A and the straight water guide groove portion 6B are filled as the water level rises, and then the water level rises and the rain water guide inclined surface of the refraction guide rain water guide unit member 10 having these refractive water guide groove portions 6A and the straight water guide groove portion 6B. The space above 12 and 22 fills up, and rainwater fills the 30th row of rainwater storage unit members at the bottom (first stage) in the rainwater storage section 3 through the water holes 7a of the partition plate 7.

  Thus, the rainwater is sequentially filled from the first stage rainwater storage unit member row in the rainwater storage unit 3 to the second and subsequent rainwater storage unit member rows in accordance with the rise in the water level, and the rainwater is temporarily stored in this state.

  Next, when the amount of rain flowing into the manhole 5 becomes smaller than the fixed amount of rainwater discharged from the outlet pipe 51 or when the rain stops, the rainwater is stored as the fixed amount of rainwater is discharged from the outlet pipe 51. Rainwater in the section 3 is discharged to the manhole 5 side through the water guide groove 6 of the rainwater guiding section 2, and the rainwater level in the rainwater storage section 3 is lowered along with this discharge. At this time, in the rainwater guiding section 2, rainwater is on the rainwater guiding inclined surfaces 12 and 22 of the refraction guiding rainwater guiding unit member 10 and the straight guiding rainwater guiding unit member 20 constituting the rainwater guiding section 2. Then, the water is guided to the refractive water guide groove 6A and the straight water guide groove 6B, and flows and discharged into the manhole 5 through the water guide groove 6 composed of these water guide grooves 6A and 6B communicated in series.

  Also, the sand contained in the rainwater also travels on the rainwater guiding inclined surfaces 12 and 22 between the refraction guiding rainwater guiding unit member 10 and the straight guiding rainwater guiding unit member 20 and directly into the refraction guiding groove portion 6A. The water is guided to the water guide groove 6B, flows out from the water guide groove 6 into the manhole 5 and settles and accumulates on the inner bottom portion of the manhole 5, and part of the sand is deposited on the groove bottom of the water guide groove 6. The sand accumulated at the bottom of the manhole 5 is removed from the ground side by a vacuum device. On the other hand, the sand accumulated in the water guide groove 6 is removed from the manhole 5 into the water guide groove 6 after all rainwater is removed. By inserting a high-pressure injection nozzle that injects high-pressure water toward the manhole 5 side, the high-pressure water is removed to the manhole 5 side and the water guide groove 6 is washed.

  In the rain guiding unit member 10 for refraction induction, the partition wall portion 16 is provided on the sides adjacent to each other at right angles where the opening ends of the groove portions 6A1 and 6A2 communicated at right angles in the refraction guide groove portion 6A. The partition wall portions 16 are not provided on the sides that are adjacent to each other at right angles where the open ends of the portions 6A1 and 6A2 do not exist, but the partition wall portions 16 may also be provided on these sides as shown in FIG. .

  Further, in the form of the rainwater guiding portion 2 shown in FIG. 12, the central portion of the rainwater guiding portion 2 from the manhole 5 side to the plurality of refraction guiding rainwater guiding unit members 10 and the straight guiding rainwater guiding unit member 20. And a terminal portion of the water guide groove 6 is formed by a single straight guiding rainwater guiding unit member 20, and the straight guiding rainwater guide of the terminal portion is formed. Instead of the unit member 20, as shown in FIG. 14, both ends of the water guide groove 6 provided spirally by providing manholes 5 'having the same shape and size as the straight guidance rainwater guidance unit member 20 are provided. You may comprise the rainwater guidance | induction part 2 connected by these manholes 5 and 5 '.

  Moreover, as the rainwater storage unit member 30 which comprises the rainwater storage part 3, it is not limited to the said structure, The rainwater storage unit member which provides the cylindrical member of the fixed height known conventionally vertically and horizontally, A rainwater storage unit member or the like formed in a grid shape may be adopted, and the rainwater storage unit 3 may be configured by only one stage without being stacked in a step shape.

DESCRIPTION OF SYMBOLS 1 Water tank 2 Rainwater guidance | induction part 3 Rainwater storage part 4 Coating | covering material 5 Manhole 6 Water conveyance groove
6A Refractive water guide groove
6B Straight water guide groove 7 Partition plate
10 Rainwater guidance unit for refraction guidance
20 Rainwater guidance unit member for straight guidance
11, 21 Rectangular plate
12, 22 Rainwater induced inclined surface
25 Support column
30 Rainwater storage unit components

Claims (6)

  A plurality of rainwater guidance unit members are arranged side by side at the bottom of a water tank formed by excavating the ground to form a rainwater guidance part, and an internal space for storing rainwater on this rainwater guidance part is provided. A rainwater storage unit is formed by stacking the rainwater storage unit members, the rainwater storage unit is formed by covering the top surface of the rainwater storage unit with a coating material, and the rainwater is led to the manhole through the rainwater guide unit. In the storage facility, the rainwater guiding portion is provided with a water guiding groove portion refracted into a flat L-shape and an inclined surface for guiding rain water toward the water guiding groove portion, and a linear water guiding groove portion. And a straight guiding rainwater guiding unit member provided with an inclined surface for guiding rainwater toward the water guiding groove, and the refraction guiding rainwater guiding unit member and the straight guiding rainwater guiding unit member. Rainwater storage facilities, characterized in that a combination of a guiding rainwater guide units member so as to communicate the water guide groove with each other to form a series of water guide groove communicating with the manhole.   The refractory guidance rainwater guiding unit member communicates with a rectangular plate having a bottom peripheral wall portion of a certain height projecting downward from the periphery of the four sides, and between the central portions of the rectangular plates adjacent to each other at a right angle. An L-shaped refracting water guide groove is formed, and the upper surface of the rectangular plate is formed as a rainwater induction inclined surface gently inclined downward from the four-side periphery toward the refracting water guide groove. The rainwater storage facility according to 1.   The rainwater guidance unit member for straight guidance is the same size and shape as the rectangular plate of the rainwater guidance unit member for refraction guidance, and the same height as the bottom peripheral wall portion of the rainwater guidance unit member for refraction guidance toward the lower side of the four-side periphery. A rectangular plate having a bottom peripheral wall projecting, and a straight shape having the same cross-sectional shape as the refractive water guide groove provided in the rain guiding unit member for refractive induction at the center in the length direction or width direction of the rectangular plate 3. The rainwater guiding inclined surface according to claim 1, wherein the water guiding groove is formed and the upper surface of the rectangular plate is formed into a rainwater guiding inclined surface gently inclined downward toward the straight water guiding groove. Rainwater storage facility.   A hollow supporting strut having a constant height whose lower end is opened downward from the rectangular plate at regular intervals to the four-side peripheral portion of the rectangular plate of the rainwater guiding unit member for refraction guidance and the plate portion along the refraction guide groove portion. And a partition wall portion formed on the inclined end surface for inducing rainwater toward the rainwater-inducing inclined surface between the lower end portions of the adjacent support columns facing each other. The rainwater storage facility according to claim 1 or claim 2.   It is the same position as the support struts provided on the refraction-inducing rainwater guidance unit member on the four sides of the rectangular plate of the straight guidance rainwater guidance unit member and the plate part along the straight water guide groove. A large, identical support strut is projected, and rainwater is directed toward the rainwater induction inclined surface between the lower end portions of the support struts facing each other in the direction perpendicular to the length direction of the straight water guide groove. The rainwater storage facility according to claim 1, 3 or 4, further comprising a partition wall portion formed on an inclined end surface to be guided.   The rainwater storage unit member is a hollow projection having a constant isosceles trapezoidal shape with a constant height, the bottom of which is the same size and shape as the rectangular plate of the rainwater guidance unit member, the lower end of which is open from the bottom plate to the bottom. And projecting at regular intervals in the width direction or length direction of the bottom plate portion, and communicating with the upper ends of these hollow projection portions into the hollow projection portions at integral intervals in the length direction of the hollow projection portions. It has a flat rectangular protruding top with several through-holes, and the lower storm water storage unit member and the upper storm water storage unit member are turned at right angles to each other so that the lower storm water storage unit member The projecting top of each hollow projection is fitted into the lower end opening of each corresponding hollow projection of the upper rainwater storage unit member to form a rainwater reservoir by stacking. Claim 1, claim 2 or Rainwater storage facility described in Motomeko 3.

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