JP4966823B2 - Bottom plate structure of storage and penetration tank, underground buried type storage and penetration system comprising the bottom plate structure - Google Patents

Description

  The present invention relates to a filling member used in a rainwater storage tank or the like that reduces the load on a river or sewerage facility during rainfall, and an underground buried storage and infiltration system using the filling member, and more particularly, drainage due to sand or the like flowing in with rainwater. The present invention relates to an underground buried type storage and infiltration system composed of a bottom plate structure that can prevent clogging of a route and extend a maintenance interval.

  2. Description of the Related Art Conventionally, there is known an underground buried storage and infiltration system including a rainwater storage tank 1 in which a plurality of filling members 2 as shown in FIG. 11 or FIG. 12 are stacked (for example, see Patent Document 1).

  In such a conventional rainwater storage tank 1, the bottom surface portion 4 a of the permeation sheet 4 provided so as to wrap almost the entire outer peripheral portion of the rainwater storage tank 1 main body is laid.

  Also, on the bottom surface portion 4a, among the plurality of filling members 2 ..., a plurality of bottom plate members 5 ... as one of the filling members provided on the lowermost surface portion are laid down vertically and horizontally. .

  As shown in FIG. 12, the bottom plate member 5 is reinforced by the plurality of reinforcing rib portions 5b to reinforce the surface rigidity of the upper surface of the bottom plate body 5a having a substantially square plate shape when viewed from above. By improving and receiving the load applied from above in a planar shape, the floor portion 1a is configured to be distributed substantially evenly.

  Further, at the four corners of the bottom plate member 5, leg connecting portions 5 c.

  The leg connecting portions 5c are spacer members 6 as connecting members interposed between the leg portions 2a at the four corners of the other filling members 2 stacked above, or a stack of these. The connecting members 8 as connecting members interposed between the filled members 2 and 2 or between the upper surface member 7 and the like are configured to be engaged from above.

  Then, at least a part of the bottom plate member 5c has a through-hole portion for allowing rainwater staying on the upper surface side of the bottom plate body 5a to flow from the upper surface side to the lower surface side of the bottom plate body 5a as shown in FIG. 9 ... are provided.

  From the periphery of the through-hole portion 9, a turbidity stop ring portion 10 is integrally formed so as to project upward.

  Next, the function and effect of this conventional bottom plate member 5 will be described.

  In the rainwater storage tank 1 in which the conventional bottom plate member 5 is used, a gap is formed between the stacked filling members 2 and 2 or between the filling member 2 and the upper surface member 7 or the bottom plate member 5. The rainwater that has flowed in is temporarily stored in the gap.

  The stored rainwater is leached into the underground G through the permeation sheet 4 provided around the filling member 2 and the like.

  As shown in FIG. 13, the rainwater W1 staying in the portion surrounded by the reinforcing ribs 5b on the upper surface side of the bottom plate main body 5a of the bottom plate member 5 forms the upper edge 10a of the turbidity stop ring portion 10 as shown in FIG. After getting over, it flows out from the through-hole portion 9 to the lower surface side.

At this time, most of the turbidity such as mud D1 having a relatively high specific gravity stays at the periphery of the turbidity stop ring portion 10 in front of the turbidity stop ring portion 10, and mainly the rainwater W2 is the bottom surface portion. The leaching sheet 4 of 4a leaches into the ground G.
Japanese Patent No. 36601717 (paragraphs 0022 to 0068, FIGS. 1 to 12)

  However, in such an underground buried storage and infiltration system having the conventional rainwater storage tank 1, the rainwater W1 that has climbed over the upper edge 10a of the turbidity stop ring portion 10 flows out from the through hole portion 9 to the lower surface side. To do.

  The rainwater W1 contains the turbidity, and after a predetermined time has passed, the turbidity D2 is filtered by the permeation sheet 4 and gradually has the same area S as the through hole 9. There is a possibility that the upper side of the permeation sheet 4 of the bottom surface portion 4a is blocked.

  For this reason, when the suspended matter D2 is not removed at a short maintenance interval, the outflow of the rainwater W2 does not reach the set amount of water, so that the desired permeation performance cannot be exhibited and it is difficult to say that the long-term usability is good. There was a problem.

  Then, this invention makes it the subject to provide the bottom plate structure of the storage penetration tank which can lengthen a maintenance space | interval, the filling member which has this bottom plate structure, and an underground buried type storage penetration system using this filling member.

  In order to achieve the above object, the invention described in claim 1 has a filling member that is stacked vertically and horizontally to form a void in a rainwater storage and penetration tank buried in the ground. In addition, the bottom plate structure used in an underground buried type storage and infiltration system for storing rainwater in the formed gap and infiltrating the stored rainwater into the ground from an infiltration sheet provided around the filling member The bottom plate provided on the lowermost surface portion of the filling member is provided with a through-hole portion for flowing rainwater accumulated on the upper surface from the upper surface side to the lower surface side of the bottom plate, and among the bottom plates, On the lower surface side facing the permeation sheet, it is characterized by a bottom plate structure that forms an escape passage that is recessedly formed around the through-hole portion.

  Moreover, what was described in Claim 2 is characterized by the baseplate structure of Claim 1 in which the said escape flow path is an annular periphery recessed groove part recessedly formed by the lower surface side periphery of a through-hole part.

  And what is described in Claim 3 is characterized by the baseplate structure of Claim 1 or 2 in which the said escape flow path is formed so that between the adjacent through-hole parts may be connected.

  Further, in the present invention, the escape passage is formed so as to coincide with a position of a reinforcing rib portion formed on the upper surface side of the bottom plate. The bottom plate structure according to claim 1 is a feature.

  According to a fifth aspect of the present invention, a turbidity stop ring portion is integrally formed on the upper surface side of the bottom plate so as to project upward from the periphery of the through hole portion. 4 is characterized by the bottom plate structure described in any one of the items.

  And what is described in Claim 6 is such that the ceiling surface portion of the escape passage formed on the lower surface side of the bottom plate is spaced from the permeation sheet laid on the floor portion of the rainwater storage permeation tank 6. The underground buried storage and infiltration comprising the bottom plate structure according to any one of claims 1 to 5, wherein the filling member is placed face-to-face and another filling member is stacked on top of the filling member. system.

  In the invention according to claim 1 configured as described above, since the escape passage is formed to be recessed around the through hole portion, a permeation sheet capable of leaching rainwater below the through hole portion. Is the total area of the area of the through-hole portion and the area of the escape channel facing the top surface of the permeation sheet.

  For this reason, rainwater containing turbidity flowing down the through-hole portion leaches into the ground through the permeation sheet from the upper surface side of the permeation sheet having an area larger than the area of the through-hole portion.

  Therefore, it is possible to extend the interval until the permeation sheet is clogged and blocked in all areas where rainwater is permeated.

  Therefore, the maintenance interval can be extended to improve the long-term usability.

  In the invention according to claim 2, an annular peripheral groove portion is formed to be recessed in the lower surface side periphery of the through-hole portion as the escape passage.

  The rainwater containing turbidity flows down to the peripheral groove portion, and the through-hole portion flows down and is dispersed around.

  At this time, the area of the peripheral groove portion is added to the area of the conventional through-hole portion, and the area for allowing rainwater to permeate into the permeation sheet can be increased and dispersed according to the formation position of the through-hole portion. You can also.

  Therefore, only by recessing the peripheral groove portion on the lower peripheral edge of the through-hole portion, the time until the permeation sheet is clogged is further extended without impairing the pressure receiving area on the lower surface side of the bottom plate. can do.

  Furthermore, since what was described in Claim 3 was connected between the adjacent through-hole parts by the said escape flow path, compared with what provided the escape flow path in all the through-hole parts separately, By reducing the number of escape passages, it is possible to suppress a decrease in the pressure receiving area on the lower surface side of the bottom plate.

  According to a fourth aspect of the present invention, the escape passage is formed so as to coincide with the position of the reinforcing rib portion formed on the upper surface side of the bottom plate.

  For this reason, a desired strength can be obtained while suppressing an increase in the amount of the resin material by forming the relief flow path in a concave manner by using the molding sink of the reinforcing rib portion formed on the upper surface side.

  According to a fifth aspect of the present invention, the turbidity stop ring portion formed on the upper surface side of the bottom plate is integrally formed so as to project upward from the peripheral edge of the through hole portion.

  Therefore, a part of the turbidity contained in the rainwater has a relatively large specific gravity and remains on the upper surface side of the bottom plate in front of the turbidity stop ring part, and the turbidity that is only the supernatant is small. Rainwater is leached from the through hole portion through the permeation sheet.

  Therefore, the amount of turbidity staying on the upper surface side of the permeation sheet can be reduced, and the maintenance interval can be further extended.

  And what was described in Claim 6 is that the ceiling surface part of the said escape flow path formed in the lower surface side of the said baseplate among the filling members of an underground buried type storage infiltration system is the floor part of a rainwater storage infiltration tank. When laid, they are placed facing each other at a distance from the penetration sheet.

  For this reason, another filling member is laminated on the upper part of the filling member having the bottom surface portion, and even when a load is applied from above, the pressure receiving area of the bottom plate is secured, and the ceiling surface portion of the escape passage, A constant flowing water passage is maintained between the top surface portion of the permeation sheet and rainwater containing turbidity can be diffused to the top surface portion of the permeation sheet.

  Next, based on the drawings, a bottom plate structure of a storage permeation tank, a filling member having the bottom plate structure, and an underground buried type storage permeation system using the filling member according to the best mode for carrying out the invention will be described. To do.

  The same or equivalent parts as those in the conventional example will be described with the same reference numerals.

  In this embodiment, as shown in FIG. 2, an underground buried storage and penetration system provided with a rainwater storage and penetration tank 11 configured substantially the same as the rainwater storage tank 1 shown in the conventional example in FIG. A U-shaped groove portion 11b for maintenance drainage is formed substantially at the center of the floor portion 11a of the rainwater storage and penetration tank 11 as a storage space in which filling members 2 embedded in the middle G are stacked.

  The floor portion 11a of the rainwater storage and permeation tank 11 is formed so that the upper surface side is substantially flat, and the permeation sheet 4 provided so as to wrap substantially the entire outer periphery of the rainwater storage and permeation tank 11 is attached to the bottom surface portion 4a. It is laid in the state.

  Also, on the bottom surface portion 4a, among the plurality of filling members 2, a bottom plate member 12 as one of the filling members provided on the lowermost surface portion is laid vertically and horizontally and laid in a plurality. .

  1 to 10 show a filling member of Example 1 of the embodiment of the present invention and an underground buried type storage and infiltration system using the filling member.

  First, the structure of the bottom plate member 12 as one of the filling members of the first embodiment will be described. As shown in FIGS. 1 and 3, the bottom plate member 12 is a bottom plate having a substantially square plate shape when viewed from above. As a bottom plate body 13.

  The bottom plate body 13 is configured as a module body having substantially the same external dimensions as the other filling members 2... As shown in FIG. 2, on the upper side surface 13 a surrounded by the side plate portions 14. A plurality of vertical and horizontal reinforcing rib portions 15 and radial oblique reinforcing rib portions 16 are integrally provided.

  The vertical and horizontal reinforcing rib portions 15 and the radial diagonal reinforcing rib portions 16 are reinforced so as to improve the surface rigidity, so that the load applied from above is received in a plane shape and is substantially applied to the floor portion 1a. It is configured to be evenly distributed.

  4 to 8, the description of the vertical and horizontal reinforcing rib portions 15 and the radial oblique reinforcing rib portions 16 is omitted for the sake of easy explanation.

  Further, at the four corners of the bottom plate member 12, leg connecting portions 5 c.

  The leg connecting portions 5c are respectively connected to the leg portions 2a at the four corners of the other filling member 2 laminated on the upper portion or the leg portions 2a of the other filling member 2 laminated on the upper side. The bottom plate member 12 is integrated with the other filling member 2 to be embedded by engaging the spacer members 6... As the connecting members interposed therebetween.

  As shown in FIG. 1 to FIG. 3, at least part of the bottom plate member 12 is rainwater that has accumulated on the upper surface side 13 a of the bottom plate body 13 from the upper surface side 13 a to the lower surface side 13 b of the bottom plate body 13. Through holes 9 are provided.

  In the first embodiment, as shown in FIG. 2, the lower side is cut into a concave shape at the intersection of the vertical and horizontal reinforcing rib portions 15 and the radial diagonal reinforcing rib portions 16 to form notch portions 17. Yes.

  In the space constituted by the notches 17, the through-hole portions 9... Are dispersed and formed at nine locations of the rice-shaped intersections, which are located directly below the intersections.

  From the periphery of the upper surface side 13a of these through-hole portions 9 ..., turbidity retaining ring portions 10 ... each having a tubular shape are integrally formed projecting upward.

  The turbidity stop ring portion 10 of the first embodiment is configured to have a constant height h from the upper surface side 13a of the bottom plate main body 13, and as shown in FIG. The rainwater W staying on the upper side surface 13a of the bottom plate body 13 surrounded by... Passes over the turbidity stop ring portion 10 and flows down from the through hole portion 9 to the lower surface side 13b.

  And among the turbidity D contained in this rainwater W, as shown in FIG. 8, turbidity, such as mud D1 with comparatively heavy specific gravity, stays in the periphery of each of these turbidity stop ring parts 10, and is white. Rainwater W1 having a relatively low content of turbidity D indicated by an arrow rides over the upper edge 10a of the turbidity stop ring portion 10 and flows out from the through hole portion 9 onto the permeation sheet 4 on the lower surface side 13b. Is configured to do.

  Further, on the bottom surface 13b of the bottom plate body 13 facing the permeation sheet 4, as shown in FIG. 1 and FIG. 3, there is an annular as a relief channel around these through-hole portions 9 ... Peripheral groove portions 9a... Are formed.

  The peripheral concave groove portions 9a are concentrically formed directly below the turbidity stop ring portions 10 and set so that the inner diameter is smaller than the outer diameter of the turbidity stop ring portion 10. Has been.

  Further, vertical and horizontal concave grooves 18 as escape passages are formed so as to be orthogonal to each other with the peripheral concave groove 9a as an intersection, and oblique concaves extending radially from the peripheral concave groove 9a. The grooves 19, 19 are formed in a recessed manner with the lower side as the opening direction.

  Among these, the vertical and horizontal concave grooves 18 are formed so as to coincide with the positions of the vertical and horizontal reinforcing rib portions 15 formed on the upper surface side 13a of the bottom plate body 13 shown in FIG. 2, as shown in FIG. In addition, a plurality of lines are arranged in parallel at predetermined intervals, and the vertical and horizontal reinforcing rib portions 15 are arranged so as to be substantially orthogonal to each other so as to exhibit a lattice shape in a top view. It is configured.

  Further, as shown in FIG. 2, the oblique concave grooves 19, 19 are formed to coincide with the positions of the radial oblique reinforcing rib portions 16, 16 formed on the upper surface side 13 a of the bottom plate body 13, As shown in FIG. 1, the bottom plate main body 13 extends from the periphery of the central through-hole portion 9 so as to exhibit a radial shape.

  Further, in the bottom plate structure of the first embodiment, as shown in FIGS. 1 and 3, the vertical and horizontal grooves 18 are formed between the central through-hole portion 9 and other peripheral through-hole portions 9. In addition, the diagonal grooves 19 and 19 that are radially formed are connected in a continuous manner, and the adjacent through-hole portions 9 and 9 are continuous in the vertical and horizontal directions by the vertical and horizontal grooves 18. So connected.

  Further, in the bottom plate structure of the first embodiment, the depth of the oblique groove 19 is set to be smaller than the distance h1 of the vertical and horizontal grooves 18 so as to place the distance h2 from the upper surface of the bottom surface portion 4a of the permeation sheet 4. Thus, it is formed shallower than the depth of the vertical and horizontal concave grooves 18.

  Further, in the first embodiment, annular peripheral groove portions 9a as escape passages are formed around the through-hole portions 9 and so on, as shown in FIG. The distance h3 from the upper surface of the bottom surface portion 4a is set to be larger than the ceiling surface portion 18a.

  Next, the effect of the filling member of Example 1 of this embodiment and the underground buried storage and infiltration system using the filling member will be described.

  In the first embodiment, the vertical and horizontal concave grooves 18 and the radial oblique concave grooves 19 and 19 as the escape flow passages are formed to be recessed around the through hole portions 9. The area of the permeation sheet 4 from which rainwater can be leached on the lower side of 9 is the total area of the area of the through-hole portion 9 and the area facing the upper surface of the permeation sheet 4 of these escape channels. .

  For example, as shown in FIG. 4, the area where the rainwater W can permeate in the extending direction of the vertical and horizontal grooves 18 is expanded in addition to the area of the through-hole portions 9. I understand that

  For this reason, as shown in FIG. 7, the rainwater W containing turbidity flowing down the through-hole portion 9 is continuously formed around the through-hole portion 9 after flowing down the through-hole portions 9. Further, the vertical and horizontal concave grooves 18 and the radial oblique concave grooves 19 and 19 spread to the upper surface side of the permeation sheet 4.

  Accordingly, the rainwater W2... Leaches out into the ground G from the upper surface side of the permeation sheet 4 having an area larger than the total area of the through-hole portions 9.

  Therefore, there is no possibility that it will not be easily leached into the underground G until the permeation sheet 4 is clogged and clogged in all areas where rainwater W2 is infiltrated, causing clogging completely. The interval until the permeability is affected can be extended.

  Therefore, the maintenance interval can be extended to improve the long-term usability.

  In addition to the vertical and horizontal concave grooves 18 and 18, the oblique concave grooves 19 and 19 extend radially from the periphery of the through-hole portion 9.

  For example, in FIG. 3, the slanted grooves 19 and 19 and the vertical and horizontal grooves 18 and 18 extend from the periphery of the through-hole portion 9 at the center of the bottom plate body 13 to the vertical and horizontal diagonal sides through the peripheral groove 9 a. The rainwater W1 including the suspended matter D is dispersed along the oblique grooves 19 and 19 and the vertical and horizontal grooves 18 and 18.

  At this time, even if the width of each of the oblique grooves 19, 19 and the vertical and horizontal grooves 18, 18 is set to be substantially equal, the rainwater W 1 is passed through the permeating sheet 4 by the dimension extending radially. It is possible to increase the area to be penetrated.

  Therefore, the flat portions remaining on the lower surface side 13b of the bottom plate main body 13 can be sufficiently left even by the extension of the oblique concave grooves 19, 19 and the vertical and horizontal concave grooves 18, 18.

  Moreover, in the first embodiment, the positions of the peripheral concave groove portions 9a formed on the lower peripheral edge of the through-hole portions 9 are approximately in a square shape within the bottom plate body 13 having a substantially square top view shape. Evenly distributed.

  Therefore, the pressure receiving area is not impaired, and the time until the penetration sheet 4 is clogged can be extended without causing the pressure receiving portion to be biased.

  Further, since the adjacent through-hole portions 9 and 9 are connected by the respective slanted concave grooves 19 and 19 and the vertical and horizontal concave grooves 18 and 18, the relief flow path is provided for every through-hole portion 9. The number of the slanting grooves 19 and 19 and the vertical and horizontal grooves 18 and 18 can be reduced as compared with the case where each is provided individually.

  Therefore, also in this respect, a decrease in the pressure receiving area on the lower surface side 13b of the bottom plate body 13 can be suppressed.

  And in this Example 1, each said slanting ditch | groove 19 and 19 and the vertical and horizontal ditch | groove 18 ... are the positions of the radial slanting reinforcement rib part 16 and 16 and the vertical and horizontal reinforcement rib part 15 ... formed in the upper surface side of the said baseplate. And are formed to match.

  For this reason, the radial slant grooves 19 and 19 and the radial slant grooves 19 and 19 are formed by using molding sink marks of the radial slant reinforcing ribs 16 and 16 and the vertical and horizontal reinforcing ribs 15 formed on the upper surface side 13a of the bottom plate body 13. Since the vertical and horizontal concave grooves 18 are formed to be concave, a good resin flow can be obtained at the time of molding, and the radial diagonal reinforcing rib portions 16 and 16 and the vertical and horizontal reinforcing rib portions 15 having a desired height can be easily formed. can get.

  Further, since the oblique grooves 19 and 19 and the vertical and horizontal grooves 18 formed in the respective radial shapes are recessed, an increase in the amount of the resin material can be suppressed as compared with a flat one over the entire surface. it can.

  Moreover, since resin sink marks do not occur in the other flat portion of the lower surface side 13b of the bottom plate body 13, the appearance quality is good and a desired strength can be obtained.

  Further, in the first embodiment, the turbidity stop ring portions 10 formed at the peripheral edges of the through hole portions 9 on the upper surface side 13 a of the bottom plate body 13 are directed upward from the peripheral edge of the through hole portion 9. , Projecting integrally.

  For this reason, of the turbidity D contained in the rainwater W, a part of the turbidity D having a relatively large specific gravity is present in front of the turbidity retaining ring portion 10 of the bottom plate body 13 as shown in FIG. Rainwater W1 with a little turbidity remaining on the upper surface side 13a and only the supernatant is leached out from the through-hole portion 9 through the penetration sheet 4 as rainwater W2.

  Therefore, the amount of the turbidity D2 ... retained on the upper surface side of the permeation sheet 4 can be reduced, and the maintenance interval can be further extended.

  In the first embodiment, as shown in FIG. 2, the leg portions 2a of the other filling members 2 stacked on the four corners of the bottom plate member 12 having the bottom plate structure, or these bottom plate members 12 are stacked. Leg connecting portions 5c are provided to be engaged with the connecting members 6 between the filling members 2 stacked on top of each other or the connecting members 6 between the filling members 2 and 2.

  For this reason, when stacking the other filling members 2 or the connecting members 6..., The other filling members that easily form the upper storage space portion can be easily engaged simply by engaging the leg connecting portions 5 c from above. It can be fixed to be immovable by being connected to the member 2.

  Further, among the bottom plate member 12 of the underground buried storage and penetration system, as shown in FIG. 4 or 5, the vertical and horizontal concave grooves 18 ... and the diagonal concave grooves 19, 19 formed on the lower surface side 13 b of the bottom plate main body 13. When the ceiling surface portions 18 a and 19 a are laid on the floor portion 11 a of the rainwater storage and permeation tank 11, the ceiling surface portions 18 a and 19 a are placed so as to face each other with an interval h 1 and h 2 from the top surface of the permeation sheet 4.

  Therefore, the other filling members 2... Are stacked on the upper part of the bottom plate member 12 having the bottom plate main body 13, and the vertical and horizontal grooves are provided while ensuring the pressure receiving area of the bottom plate main body 13 even when a load is applied from above. 18 and the ceiling surface portions 18a and 19a of the oblique grooves 19 and 19 and the upper surface portion of the permeation sheet 4, a flowing water passage having a constant cross-sectional area through which water can flow is maintained, and the suspended matter D is obtained. The rainwater W1 contained can be diffused in the upper surface portion of the permeation sheet 4.

  Moreover, in the first embodiment, even if the turbidity D2 accumulates on the upper surface of the permeation sheet 4 directly below the through-hole portion 9 to cause clogging, the vertical and horizontal grooves 18 communicated with the peripheral groove portion 9a, and From the flowing water passage formed by the oblique grooves 19, 19, the rainwater W <b> 2 is guided so as to disperse on the upper surface of the other permeation sheet 4 that is not clogged, and can penetrate into the underground G.

  In the bottom plate structure of the first embodiment, the depth of the oblique groove 19 is set to be smaller than the interval h1 of the vertical and horizontal grooves 18 so as to place the interval h2 from the upper surface of the bottom surface portion 4a of the permeation sheet 4. The vertical and horizontal grooves 18 are formed shallower than the depth.

  For this reason, the bottom plate main body 13 is formed along the oblique grooves 19 while securing a flowing water passage having a constant cross-sectional area between the peripheral groove portions 9a, 9a of the through-hole portions 9 disposed close to each other in the oblique direction. However, the possibility of bending can be reduced.

  Further, in the first embodiment, as shown in FIG. 7, the rainwater W1 flowing down from the through-hole portions 9 ... flows while being distributed along the vertical and horizontal concave grooves 18 and the oblique concave grooves 19, 19. Form. For this reason, the upper surface side of the bottom surface portion 4a of the permeation sheet 4 is constantly subjected to hydrodynamic pressure due to the flow of rainwater, and the suspended turbidity D also flows, so as shown in FIG. The turbidity D2 and D2 are difficult to stay.

  Further, in the first embodiment, annular peripheral groove portions 9a as escape passages are formed around the through-hole portions 9 and so on, as shown in FIG. The distance h3 from the upper surface of the bottom surface portion 4a is set to be larger than the ceiling surface portion 18a.

  For this reason, even if the turbidity D2 stays on the upper surface side of the bottom surface portion 4a of the permeation sheet 4, the upper end of the turbidity D2 is difficult to reach the lower peripheral edge of the through-hole portion 9, and the through-hole portion 9 can be easily formed. Is less likely to be blocked.

  FIG. 9 shows a bottom plate member 22 as a filling member of Example 2 of the embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said embodiment and Example 1. FIG.

  On the lower surface side 23b of the bottom plate main body 23 as a bottom plate constituting the bottom plate member 22 of the second embodiment, a stepped ladder-like concave groove 28 as an escape passage has a substantially rectangular shape in front view and has a predetermined interval. The recesses are formed between the square legs 29 arranged in a plurality of rows.

  The stepped ladder-like grooves 28 as the escape passages of the second embodiment have an area capable of receiving the weight of the other filling members 2 stacked above about 60 to 80%, and the lower surface side 23b. It is formed to leave.

  Next, the effect of the bottom plate member 22 of the second embodiment will be described.

  The lower surface side 23b of the bottom plate main body 23 in which the stepped ladder-like grooves 28 of the bottom plate member 22 of the second embodiment are formed can receive the weight of other filling members 2 not shown and the like stacked on the upper side. An area of approximately 60 to 80% is left by the square legs 29 arranged in a plurality of rows in a protruding manner.

  For this reason, the stepped ladder-like grooves 28 are crushed by a load from above so as to reduce the cross-sectional area required for running water, or the permeation sheet 4 or the earth and sand in the ground G There is no risk of being blocked by rising.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment and Example 1, and thus description thereof is omitted.

  FIG. 10 shows a bottom plate member 32 as a filling member of Example 3 of the embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said embodiment and Example 1 and 2. FIG.

  The lower surface side 33b of the bottom plate main body 33 as the bottom plate constituting the bottom plate member 32 of the third embodiment has a relief concave groove 38 as a relief flow path having a substantially circular shape in front view, with a predetermined interval, A recess is formed between the round legs 39 arranged in a plurality of rows.

  These relief grooves 38 are arranged in such a manner that a plurality of round leg portions 39 are projected and arranged in an area capable of receiving the weight of other filling members 2 not shown and the like stacked on the upper side. About 50 to 70% is left on the lower surface side 33b of 33.

  Next, the effect of the bottom plate member 32 of the third embodiment will be described.

  The lower surface side 33b of the bottom plate body 33 in which the relief grooves 38 of the bottom plate member 32 of the third embodiment are formed has an area capable of receiving the weight of other filling members 2 not shown and the like stacked on the upper side. Are set so as to leave about 50 to 70% by the plurality of round leg portions 39 arranged in a protruding manner.

  For this reason, the escape concave grooves 38 are crushed by a load from above so as to reduce the cross-sectional area required for running water, or the soil of the infiltration sheet 4 or the underground G rises. This reduces the risk of being blocked.

  Moreover, even if the flowing water passage between the round leg portions 39, 39 is blocked, a plurality of other flowing water passages are formed around the through-hole portion 9. There is little possibility that the rainwater W1 containing will be unable to flow.

  Other configurations and operational effects are substantially the same as those of the above-described embodiment and Examples 1 and 2, and thus description thereof is omitted.

  As mentioned above, although embodiment and Example 1 of this invention were explained in full detail with reference to drawings, the concrete structure is not limited to this embodiment, and the design of the grade which does not deviate from the summary of this invention Modifications are included in the present invention.

  That is, in Example 1 of the above-described embodiment, as shown in FIGS. 1 and 3, the bottom plate body 13 constituting the bottom plate is a bottom plate having a substantially square plate shape as viewed from above, and a part of the filling member is used. Although the present invention has been described with reference to the bottom plate member 12 that is integrally formed, the present invention is not limited to this. For example, the bottom plate is provided separately from the filling member such as the bottom plate member 12, or the filling member As long as it is a bottom plate that forms a relief flow path that is recessedly formed around the through-hole portion 9, the shape and quantity of the relief flow path and the material of the bottom plate Etc. are not limited.

  In the bottom plate structure of the first embodiment, the depth of the oblique groove 19 is set to be smaller than the interval h1 of the vertical and horizontal grooves 18 so as to place the interval h2 from the upper surface of the bottom surface portion 4a of the permeation sheet 4. However, the present invention is not limited to this, but is not limited to this. When the interval h1 is smaller than the interval h2, or has the same dimensions, or within the ceiling surface portions 18a and 19a, Further, the shape, number, formation interval, etc. of the slanted grooves 19, 19 and the vertical and horizontal grooves 18 are not particularly limited.

  Further, in the first embodiment, annular peripheral groove portions 9a as escape passages are formed around the through-hole portions 9 and so on, as shown in FIG. The distance h3 from the upper surface of the bottom surface portion 4a is set to be larger than the ceiling surface portion 18a of the bottom surface portion 18a. However, the present invention is not limited to this. ... or at least one of the vertical and horizontal concave grooves 18 or only the peripheral concave groove portion 9a, and the like, the concave shape and quantity of the peripheral concave groove portion 9a and the oblique concave grooves 19 ... or the vertical and horizontal concave grooves 18 As a matter of course, the shape of the connecting portion may be configured in any manner.

It is a perspective view explaining the structure of the lower surface side of a baseplate member by the filling member of Example 1 of the best mode of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a partial cross-section exploded perspective view explaining the structure of the floor part vicinity of a rainwater storage penetration tank in the underground burying type storage penetration system using the filling member of Example 1, and this filling member. It is a front view explaining the structure of the lower surface side of a baseplate member by the filling member of Example 1. FIG. It is an end elevation in the position along the AA line in Drawing 3 which omitted the reinforcing rib part with the filling member of Example 1. FIG. 6 is an end view at a position along the line BB in FIG. 3 in which the reinforcing rib portion is omitted in the filling member of Example 1. FIG. 4 is a side view of the filling member of Example 1 viewed from the direction of arrow D in FIG. 3. In the underground buried type storage and infiltration system using the filling member of Example 1, the state where rainwater stays in the portion corresponding to the position along the line AA in FIG. 3 where the reinforcing rib portion is omitted is described. FIG. In the underground buried type storage and infiltration system in which the filling member of Example 1 is used, in a portion corresponding to the position along the line AA in FIG. It is an end view to explain. It is a top view explaining the structure of the lower surface side of a baseplate member by the filling member of Example 2 of this invention's best mode. It is a top view explaining the structure of the lower surface side of a baseplate member by the filling member of Example 3 of this invention's best mode. It is the underground longitudinal cross-sectional view explaining the structure of a rainwater storage penetration tank with the underground buried type storage penetration system using the filling member of this example, and this filling member. It is a disassembled perspective view explaining the combination of a filling member etc. in the underground embedding type storage penetration system using the filling member of this example, and this filling member. FIG. 13 is an end view at a position along a line CC in FIG. 12 in which a reinforcing rib portion is omitted in an underground buried type storage and penetration system using a filling member of a conventional example.

Explanation of symbols

2 Filling member 2a Leg 4 Penetration sheet 6 Spacer member (connection member)
8 Connection members (connection members)
9 Through-hole part 10 Turbidity stop ring part 12, 22, 32 Bottom plate member (filling member)
13, 23, 33 Bottom plate body (bottom plate)
13b, 23b, 33b
Bottom side 15 Vertical and horizontal reinforcing ribs (reinforcing ribs)
16 Radial diagonal reinforcing rib (reinforcing rib)
18 Vertical and horizontal grooves (Relief channel)
19 Slanted groove (Relief channel)
18a, 19a Ceiling surface part 28 Stepped ladder-like groove (Relief channel)
38 Relief groove (Relief channel)

Claims (6)

In the rainwater storage and infiltration tank buried in the ground, it has a filling member that is stacked vertically and horizontally to form a gap and is filled with rainwater stored in the formed gap. A bottom plate structure used for an underground buried type storage and infiltration system that infiltrates rainwater from an infiltration sheet provided around the filling member into the ground,
The bottom plate provided on the lowermost surface portion of the filling member is provided with a through-hole portion for flowing rainwater accumulated on the upper surface from the upper surface side to the lower surface side of the bottom plate. A bottom plate structure characterized in that a relief passage formed to be recessed around the through-hole portion is formed on the lower surface side facing each other.   The bottom plate structure according to claim 1, wherein the escape passage is an annular peripheral groove portion that is formed to be recessed in a lower surface side periphery of the through-hole portion.   The bottom plate structure according to claim 1 or 2, wherein the escape passage is formed so as to communicate between adjacent through-hole portions.   The bottom plate structure according to any one of claims 1 to 3, wherein the escape passage is formed so as to coincide with a position of a reinforcing rib portion formed on an upper surface side of the bottom plate. .   5. The turbidity stop ring portion is integrally formed on the upper surface side of the bottom plate so as to project upward from the peripheral edge of the through-hole portion. The bottom plate structure described in the item.   The bottom surface of the bottom plate is placed so that the ceiling surface portion of the escape channel faces the permeation sheet laid on the floor portion of the rainwater storage permeation tank, and the other filling member is placed on the bottom plate. The underground buried type storage and infiltration system comprising the bottom plate structure according to any one of claims 1 to 5, wherein the underground material is laminated on an upper portion of the filling member.

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