JP4695461B2 - Filling material and filling structure of underground water tank - Google Patents

Description

The present invention relates to a filling material and a filling structure for a underground water tank provided in a basement such as a parking lot, a park, and a residential land, and is particularly preferably used for a ground water tank having a relatively small volume of about several m ³ to several tens of m ^3. The present invention relates to a filler and a filling structure.

  In urbanized areas where there are almost no unpaved roads or vacant land, rainwater flows into the river through the side ditches of the road without penetrating into the ground, so it exceeds the capacity of the river in a short time in the rainy season, so-called May cause urban flooding. On the other hand, during the dry season, the water level of dams and lakes falls, resulting in water shortages, so water supply restrictions are imposed in various places, making it difficult to provide sufficient amounts of water to garden plants.

  For these reasons, a groundwater tank is provided to temporarily store rainwater and then gradually discharge it into rivers, etc., or gradually infiltrate it underground to prevent urban flooding, or to store rainwater stored in the groundwater tank. Effective use such as pumping and giving to plants has come to be performed.

  As a filler to be filled in such a groundwater tank, for example, hollow struts are fitted and fixed to the hole-like connecting portions of the connecting frame in which about 10 to 15 hole-like connecting portions are connected by connecting bars. In addition, there is known a technique in which these are arranged side by side in the front-rear and left-right directions and stacked while connecting adjacent connecting frames with an H-shaped connecting piece (Patent Document 1).

However, in the case of connecting the connecting frames with the H-shaped connecting piece like the above-mentioned filler, the number of parts is large and the connecting work is troublesome, and the connecting strength between the connecting frames is weak and tight. Since it is difficult to connect to each other, the stability when stacked is insufficient, and if a large external force is applied, some connecting pieces may be damaged or the connection may become loose, causing deformation or collapse of the stacked filler There was a fear. In addition, since the number of columns is large and the distance between columns is small, there is a problem that thick inflow pipes and outflow pipes cannot be inserted from the side. There was also a problem that it was difficult to perform maintenance.
JP 2000-192516 A

  The present invention has been made in view of the above problems, and can firmly connect the beam bodies corresponding to the connection frame, and even if a large external force is applied, deformation and collapse of the accumulated filler are difficult to occur, and workability is improved. An object of the present invention is to provide a filling material and a filling structure for an underground water tank that are good and do not require any connecting piece, and that can be inserted from the side or inspected from above.

In order to solve the above-described problems, a filling material for a groundwater tank according to the present invention includes a cylindrical column made of a synthetic resin having a large-diameter lower end fitting port and a small-diameter upper end fitting port, a semi-cylindrical column made of a synthetic resin equal shape, and made of synthetic resin quarter cylindrical pillar having a shape divided into four equal parts to and fro the tubular posts, made of a synthetic resin and a rectangular beam body A large-diameter annular groove for fitting a lower end fitting port of the cylindrical column is formed on the upper surface excluding the four corner portions of the beam body, and has four corner angles of the beam body. A large-diameter quarter-annular groove formed by dividing the large-diameter annular groove into four equal parts is formed on the upper surface of the part, and the upper end fitting opening of the cylindrical column is formed on the lower surface except for the four corners of the beam body. A small-diameter annular groove to be fitted is formed concentrically with the large-diameter annular groove, and a small-diameter quarter-annular groove obtained by dividing the small-diameter annular groove into four equal parts is formed on the lower surface of the four corners of the beam body. Tetra- half grooves concentrically formed in diameter, on the side frame portion of the beam body is characterized in that the concave portion of circular arc shape is formed.

  In the filler of the present invention, the beam body preferably has a square planar shape, and a large-diameter annular groove and a small-diameter annular groove are preferably formed on the upper surface and the lower surface of the central portion thereof. It is also preferable that an opening is formed inside the annular groove. And it is also preferable that the notch part which engages the engagement protrusion of a side plate is formed in the four sides of a beam body.

  The groundwater tank filling structure according to the present invention uses the above-mentioned fillers to dispose a cylindrical column, a semi-cylindrical column, and a quarter-cylindrical column on the bottom plate of the underground water tank, and a beam body on the front and back thereof. In the small-diameter annular groove formed by combining the small-diameter annular grooves of each beam body and the small-diameter quarter-annular grooves at the corners of the four beam bodies adjacent to each other in the shape of a “field”. The upper end fitting port of the cylindrical column is fitted from below, and the upper end fitting port of the quarter cylindrical column is fitted from below into the small-diameter quarter annular groove located at the corner of the aggregate of beams arranged in the front, rear, left and right directions. The upper end fitting opening of the semi-cylindrical column is formed in the small-diameter semi-annular groove formed by combining the small-diameter quarter-annular grooves at the corners of the two beam bodies adjacent to each other along the four sides of the aggregate of the beam bodies. Are fitted from below, and a cylindrical column, a semi-cylindrical column, and a quarter-cylindrical column are arranged on the aggregate of beams, and the large-diameter annular groove of each beam and the shape of a rice field Adjoin The lower end fitting port of the cylindrical column is fitted from above into the large-diameter annular groove formed by combining the large-diameter quarter-annular grooves at the corners of the four beam bodies, and the corner of the aggregate of the beam bodies The lower end fitting port of the quarter cylindrical column is fitted from above into a large-diameter quarter-annular groove located at the top, and the large diameter of the corners of two beam bodies adjacent to each other along the four sides of the aggregate of beam bodies The lower end fitting port of the semi-cylindrical column is fitted from above into a large-diameter semi-annular groove formed by combining the four semi-annular grooves, and each column and aggregate of beam bodies are thus alternately arranged. A side plate and a top plate are attached to the four side surfaces and the upper surface of the three-dimensional structure stacked up to the height of the underground water tank.

  In the filling structure of the present invention, the bottom plate is a synthetic resin square perforated plate having substantially the same four side dimensions as the beam body, and the bottom end of the cylindrical column is fitted to the upper surface excluding its four corners. A large-diameter annular groove for fitting the joint is formed, and a large-diameter quarter-annular groove obtained by dividing the large-diameter annular groove into four equal parts is formed on the upper surfaces of the four corners. The bottom plate is arranged side by side in the same manner as the beam body, and is formed by combining the large-diameter annular grooves of each bottom plate and the quarter-annular grooves at the corners of the four bottom plates adjacent to each other in the shape of a “field”. The bottom end of the cylindrical column is fitted into the large-diameter annular groove from above, and the bottom end of the quarter-cylindrical column is inserted into the large-diameter quarter-annular groove located at the corner of the assembly of bottom plates arranged side by side. The fitting port is fitted from above, and the quarter-annular grooves at the corners of the two bottom plates adjacent to each other along the four sides of the bottom plate assembly are combined. The semi-annular groove of a large diameter are made, it is preferable that the lower end of the semi-cylindrical column fitting opening is fitted from above.

  And the bottom plate is provided with engagement projections on its four sides, and is also used as a side plate, and it is used as a notch in the beam body exposed on the four sides of the three-dimensional structure in which each column and aggregate of beam bodies are alternately stacked. It is also preferable that the engagement protrusions are engaged and attached.

  Since the filler of the present invention is stacked according to the filling structure of the present invention, the four beam bodies adjacent to the shape of the “field” are large-diameter quarter-annular on the upper surface side of the corners. A small diameter formed by combining a lower end fitting port of a cylindrical column fitted from above into a large-diameter annular groove formed by combining the grooves and a small-diameter quarter-annular groove on the lower surface side of the corner portion. The four corners are strongly double-connected and supported by the upper end fitting opening of the cylindrical column fitted into the annular groove from below, and the aggregate of the beam bodies arranged in the front-rear and left-right directions Two beam bodies adjacent along the four sides are semi-cylindrical columns fitted from above into large-diameter semiannular grooves formed by combining large-diameter quarter-annular grooves on the upper surface side of the corners. Of a semi-cylindrical column fitted from below into a small-diameter semi-annular groove formed by combining a lower-end fitting port of the small-diameter and a small-diameter quarter-annular groove on the lower surface side of the corner portion thereof By the end fitting opening, the two corner portions is supported by being rigidly doubly linked. Each beam body is supported by a cylindrical column in which a lower end fitting port and an upper end fitting port are fitted into a large-diameter annular groove at the center of the upper surface and a small-diameter annular groove at the center of the lower surface. The corners of the beam located at the corners of the body are supported by the quarter cylinder.

Thus, in the filling structure using the filler of the present invention, the beam bodies are strongly double-connected by the cylindrical column and the semi-cylindrical column, and the center and corners of each beam unit are the cylindrical column. order to be stacked while being uniformly supported by the semi-cylindrical pillars and quarter cylindrical pillars, is excellent in the stability of stacking strength, also act large external force from the top and the side, three-dimensional structure raised product is There is almost no fear of deformation or collapse, and no conventional connecting piece is required. In addition, a semi-cylindrical column is arranged along the four sides of the aggregate so that the columns do not protrude outward from the four sides of the aggregate of beams, and a quarter-cylindrical column is arranged at the corner of the aggregate and stacked. Therefore, the four side surfaces of the three-dimensional structure become flat surfaces without protrusions, and the side plates can be easily attached. The filling structure using the filler of the present invention, the number of the column with respect to the beam body is rather small, semi-cylindrical pillar mutual spacing and the semi-cylindrical pillars and quarter cylindrical on the side of the three-dimensional structure raised product In addition to the wide space between the pillars, the side frame portion of the beam body has an arcuate recess, so that a thick inflow pipe or outflow pipe can be inserted from the side. Since the opening is formed inside the small-diameter annular groove of the beam body, the stacked cylindrical pillars communicate with each other up and down by the openings, and the cylindrical pillars communicated with the top and bottom are utilized. Inspection etc. can also be performed from above.

  Also, if the bottom plate is a square perforated plate formed with a large-diameter annular groove and a large-diameter quarter-annular groove as described above, the bottom plate is arranged in the front-rear and left-right directions, and the cylindrical column, semi-cylindrical shape as described above By fitting the lower end fitting opening of each of the pillar and the quarter cylindrical pillar into the annular groove of each bottom plate, the annular groove and the semi-annular groove formed by combining the quarter annular grooves, the quarter circumferential groove of the corner part, Since these columns can be easily arranged while positioning, and each bottom plate can be connected by a cylindrical column or a semi-cylindrical column, the workability is greatly improved. And the ones with engaging projections formed on the four sides of the bottom plate are also used as side plates as described above, and the engaging projections are engaged with the notches of the beam exposed on the four sides of the three-dimensional structure piled up with the filler. By doing so, it can be easily attached to the four side surfaces of the three-dimensional structure.

  Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a beam body that is a constituent member of a filling material for a groundwater tank according to the present invention, FIG. 2 is a perspective view of the inverted beam body, and FIG. 3 is a cylindrical column that is a constituent member of the filler material. FIG. 4 is a perspective view of a semi-cylindrical column that is a constituent member of the filler, FIG. 5 is a perspective view of a quarter-cylindrical column that is a constituent member of the filler, and FIG. 6 is an underground according to the present invention. FIG. 7A is an enlarged partial perspective view showing the state before the side plate is attached to the beam body, and FIG. 7B is a view after the side plate is attached to the beam body. enlarged partial perspective view showing a state, FIG. 8 is a tubular column at the bottom plate side by side before and after semi-cylindrical columns, perspective view of a place of arranging the quarter cylindrical pillar, a filling material according to Figure 9 invention perspective view for explaining the assembling direction of the filling structure using, FIG. 10 is a schematic overall view showing a packing structure of the underground water tank according to the present invention.

  The filling material of the underground water tank according to the present invention includes a synthetic resin beam 1 shown in FIGS. 1 and 2, a synthetic resin cylindrical column 2 and a semi-cylindrical shape shown in FIGS. 3, 4, and 5, respectively. It consists of a pillar 3 and a quarter cylindrical pillar 4.

  As shown in FIG. 3, the cylindrical column 2 is a tapered cylindrical column with a tapered diameter having a large-diameter lower end fitting port 2 a and a small-diameter upper end fitting port 2 b. The size and thickness are not particularly limited, but considering the strength, transportability, handling, etc., the height is about 250 to 500 mm, the lower end fitting port 2 a is about 200 mm, and the upper end fitting port 2 b is about 150 mm. The wall thickness is preferably set to about 1 to 5 mm.

  As shown in FIG. 4, the semi-cylindrical column 3 has a shape obtained by dividing the cylindrical column 2 into left and right parts, and a lower end fitting port 3a having a shape obtained by dividing the lower end fitting port 2a into two equal parts. And a tapered semi-cylindrical column with a tapered end provided with an upper end fitting port 3b having a shape obtained by dividing the upper end fitting port 2b into two equal parts. Further, as shown in FIG. 5, the quarter cylindrical column 4 has a shape obtained by dividing the cylindrical column 2 into four parts in the front, rear, left and right directions, and has a lower end formed by dividing the lower end fitting port 2 a into four equal parts. This is a tapered quadrangular cylindrical column having a tapered shape and having a fitting port 4a and an upper end fitting port 4b having a shape obtained by dividing the upper end fitting port 2b into four equal parts.

  On the other hand, the beam body 1 has a square planar shape as shown in FIG. 1, and has a large-diameter annular shape for fitting a large-diameter lower end fitting port 2a of the cylindrical column 2 on the upper surface of the center portion thereof. Grooves 1a are formed, and large-diameter quarter-annular grooves 1b obtained by equally dividing the large-diameter annular groove 1a are formed on the upper surfaces of the four corners of the beam body 1, respectively. As shown in FIG. 2, a small-diameter annular groove 1c for fitting the small-diameter upper end fitting port 2b of the cylindrical column 2 is formed on the lower surface of the central portion of the beam body 1. Small-diameter quarter-annular grooves 1d obtained by dividing the groove 1c into four equal parts are formed on the lower surfaces of the four corner portions of the beam body 1, respectively.

  As shown in FIG. 1, the beam body 1 includes a side frame portion 1e having four sides, an annular inner frame portion 1f on the inside thereof, an outer peripheral wall of a large-diameter annular groove 1a, and a curve of a large-diameter quarter-annular groove 1b. The outer wall has a structure integrated and connected by a large number of connecting pieces 1g extending in the front-rear, left-right, and diagonal directions, and the inside of the inner peripheral wall of the small-diameter annular groove 1c on the lower surface is a circular opening 1h. Yes. The four side frame portions 1e are provided with two notches 1i for engaging side plate engagement projections, which will be described later, and as shown in FIG. 2, the center of each side frame portion 1e. Arc-shaped concave notches 1j are formed at the front and rear, left and right lower ends of the lower end of the portion and the annular inner frame portion 1f. The recess 1j is formed so that a thicker inflow pipe or outflow pipe can be inserted from the side when the filler of the present invention is stacked.

  The size of the beam body 1 is not particularly limited, but considering the balance with the cylindrical column 2 and the like, strength, transportability, handleability, etc., the length of one side is about 500 mm and the height (vertical thickness) is 50 mm. It is preferable to set the degree. The diameter of the large-diameter annular groove 1a is set to be the same as the diameter of the lower end fitting port 2a of the cylindrical column 2, and the diameter of the small-diameter annular groove 1c is the same as the diameter of the upper end fitting port 2b of the cylindrical column 2. Needless to say, the groove widths of the annular grooves 1a and 1c are set slightly wider than the thickness of the cylindrical column 2.

As shown in FIG. 10, the filling structure of the underground water tank according to the present invention uses the filler having the frame body 1, the cylindrical column 2, the semi-cylindrical column 3, and the quarter-cylindrical column 4 described above. The side plate 6 and the top plate 7 are attached to the four side surfaces and the upper surface of the three-dimensional structure assembled in the manner described later on the bottom plate 5 of the underground water tank .

  As shown in FIG. 6, the bottom plate 5 used in this filling structure is a synthetic resin square perforated plate having substantially the same four side dimensions as the beam body 1 (however, no holes are shown in FIG. 6). And a large-diameter annular groove 5a for fitting the lower end fitting opening 2a of the cylindrical column 2 is formed on the upper surface of the central portion of the bottom plate 5, and the upper surfaces of the four corner portions are formed. Is formed with a large-diameter quarter-annular groove 5b obtained by dividing the annular groove 5a into four equal parts. Further, ribs 5c that extend in the front-rear, left-right, and diagonal directions and an annular rib groove 5d are formed to increase the strength and rigidity of the bottom plate 5, and the four sides of the bottom plate 5 are provided with cutout portions 1i of the beam body 1. Two engaging protrusions 5e to be engaged are formed. The engaging protrusion 5e is necessary when the bottom plate 5 is also used as the side plate 6, and may not be used when the bottom plate 5 is not used as the side plate 6.

  When assembling the filling structure of the present invention, first, as shown in FIG. 8, the bottom plate 5 is arranged on the bottom of the underground water tank in the front-rear and left-right directions, and the cylindrical column 2, the semi-cylindrical column 3, and the quarter-cylindrical column 4 are placed thereon. In the annular groove formed by combining the annular groove 5a at the center of each bottom plate 5 and the quarter-annular grooves 5b at the corners of the four bottom plates 5 adjacent to each other in the shape of a "field". The lower end fitting opening 2a of the column 2 is fitted from above, and the lower end fitting opening 4a of the quarter cylindrical pillar 4 is fitted from above into the quarter annular groove 5b located at the corner of the aggregate of the bottom plates 5 arranged in the front, rear, left and right directions. And a lower end fitting opening of the semi-cylindrical column 3 in a semi-annular groove formed by combining the four semi-annular grooves 5b at the corners of two bottom plates 5 adjacent to each other along the four sides of the aggregate of the bottom plates 5 3a is fitted from above. In this way, the four bottom plates 5 adjacent to each other in the shape of the “field” are fitted at the lower ends of the cylindrical pillars 2 fitted into the annular grooves formed by combining the quarter annular grooves 5b at the corners. The four corners are firmly connected to each other by the joint 2a, and the two bottom plates 5 adjacent to each other along the four sides of the aggregate of the bottom plates are formed in a semicircular shape formed by combining the four semi-annular grooves 5b at the corners. The two corner portions are firmly connected to each other by the lower end fitting port 3a of the semi-cylindrical column 3 fitted in the groove.

  Next, as shown in FIG. 9, the beam bodies 1 are arranged on the pillars 2, 3 and 4 in the front-rear and left-right directions, and the small-diameter annular groove 1 c at the center of the lower surface of each beam body 1 The upper end fitting port 2b of the cylindrical pillar 2 is fitted from below into a small-diameter annular groove formed by combining small-diameter quarter-annular grooves 1d on the lower surface of the corners of the adjacent four beam bodies 1, and the front, rear, left, right The upper end fitting opening 4b of the quarter cylindrical column 4 is fitted from below into the small-diameter quarter-annular groove 1d located at the corner of the aggregate of the beam bodies 1 arranged in a row, along the four sides of the aggregate of the beam bodies. The upper end fitting port 3b of the semi-cylindrical column 3 is fitted from below into the small-diameter semi-annular groove formed by combining the small-diameter quarter-annular grooves 1d on the lower surface of the corners of the two beam bodies 1 adjacent to each other. . And the cylindrical column 2, the semi-cylindrical column 3, and the quarter-cylindrical column 4 are arranged on the aggregate of the beam bodies 1, the large-diameter annular groove 1a on the upper surface of each beam body 1, and the "field" The lower end fitting port 2a of the cylindrical column 2 is fitted from above into the large-diameter annular groove formed by combining the large-diameter quarter-annular grooves 1b on the upper surfaces of the corners of the four beam bodies 1 adjacent to each other in a letter shape. The lower end fitting opening 4a of the quarter cylindrical column 4 is fitted from above into a large-diameter quarter annular groove 1b located at the corner of the aggregate of the beam bodies 1 along the four sides of the aggregate of beam bodies. The lower end fitting port 3a of the semi-cylindrical column 3 is fitted from above into a large-diameter semi-annular groove formed by combining large-diameter quarter-annular grooves 1b on the upper surface of the corners of two adjacent beam bodies 1. Combine.

  In the above-described manner, the pillars 2, 3, 4 and the assembly of the beam bodies 1 which are constituent members of the filler of the present invention are alternately stacked until the height of the underground water tank is reached, as shown in FIG. The side plate 6 and the top plate 7 are attached to the four side surfaces and the upper surface of the stacked three-dimensional structure. In the filling structure of this embodiment, the above-mentioned bottom plate 5 is also used as the side plate 6, and the engagement projections 5e of the bottom plate 5 also used as the side plate 6 are stacked as shown in FIGS. 7 (a) and 7 (b). By engaging with the notches 1i of the beam body 1 exposed on the four side surfaces of the structure, as shown in FIG. 10, the side plate is attached to the two stages of the beam body. Then, the bottom plate 5 is turned upside down to be used as the top plate 7, and the bottom plate 5 is placed on the respective uppermost beam bodies 1 and the notches of the beam body 1 are cut out so that the engaging projections 5e do not get in the way. The engaging protrusion 5e is inserted into the part 1i.

  In the groundwater tank having such a filling structure, as shown in FIG. 10, a water-permeable or water-impervious sheet 8 is provided on the lower side of the bottom plate 5 and the outside of the side plate 6 as necessary, and on the upper side of the top plate 7. Is provided with a water-permeable sheet 9. And the opening is formed in the side plate 6 and the sheet | seat 8, and the inflow tube 10 and the outflow tube 11 are inserted in the side surface of the solid structure which piled up the filler through this opening. In that case, if the beam body 1 and the columns 2, 3 and 4 have the dimensions described above, a thick inflow pipe 10 and outflow pipe 11 having a pipe diameter of about 200 mm can be inserted.

  Further, as shown in FIG. 10, an opening is formed in the top plate 7 and the water permeable sheet 9 thereover as necessary, and a vertical tube 12 with a lid serving as an inspection port is inserted through this opening, and the uppermost stage is inserted. The large-diameter annular groove 1a of the beam body 1 is fitted. When the vertical tube 12 with a lid is provided in this way, the respective cylindrical pillars 2 below it communicate with each other as described above. Therefore, the lid of the vertical tube 12 is removed and an internal inspection of the underground water tank is performed from the ground. Etc.

As described above, according to the filling structure assembled by using the filler of the present invention, the four beam bodies 1 adjacent to each other in the shape of the “field” are large-diameter quarter-annular grooves on the upper surface side of the corners. The lower end fitting port 2a of the cylindrical column 2 fitted from above to the large-diameter annular groove formed by combining 1b and the small-diameter quarter-annular groove 1d on the lower surface side of the corner portion are formed by combining. The four corners are strongly double-coupled and supported by the upper end fitting opening 2b of the cylindrical column 2 fitted from below into the small-diameter annular groove formed, and the beams arranged in the front, rear, left and right directions Two beam bodies 1 adjacent to each other along the four sides of the body assembly are fitted from above into a large-diameter semi-annular groove formed by combining large-diameter quarter-annular grooves 1b on the upper surface side of the corners. A small-diameter semi-annular groove formed by combining the lower end fitting port 3a of the combined semi-cylindrical column 3 and the small-diameter quarter-annular groove 1d on the lower surface side of the corner portion thereof. The mated upper end fitting opening 3b of the semi-cylindrical pillar 3 from the side, the two corner portions is supported by being rigidly doubly linked. Each beam body 1 is supported by a cylindrical column 2 in which a lower end fitting port 2a and an upper end fitting port 2a are fitted into a large-diameter annular groove 1a at the center of the upper surface and a small-diameter annular groove 1c at the center of the lower surface, respectively. Further, the corner portion of the beam body 1 positioned at the corner portion of the aggregate of the beam bodies is supported by the quarter cylindrical column 4. Thus, in the filling structure assembled using the filler according to the present invention, the beam bodies 1 are strongly double-connected by the cylindrical column 2 and the semi-cylindrical column 3, and the center and corner angle of each beam body 1 are combined. Since the parts are stacked while being evenly supported by the cylindrical column 2, the semi-cylindrical column 3 and the quarter-cylindrical column 4, the strength and stability of the stacking are excellent, and a large external force acts from above or from the side. However, there is almost no fear that the three-dimensional structure assembled with this filler will be deformed or collapsed, and the workability is good because the filler can be easily stacked without using any conventional connecting piece. is there. In addition, the semi-cylindrical columns 3 are arranged along the four sides of the aggregate so that the columns do not protrude from the four sides of the aggregate of the beam bodies 1, and the quarter-cylindrical columns 4 are arranged at the corners of the aggregate. since the stacked and, mounting facilitates der four sides is a flat surface without protrusions plate 6 (5) of the stacked three-dimensional structure is, furthermore, a circle on the side frame portion 1e of Haritai 1 since forming the arcuate concave portion 1j, from the side, Ru can der to insert thicker inlet pipe and outlet pipe.

It is a perspective view of the beam which is a structural member of the filling material of the underground water tank which concerns on this invention. It is a perspective view of the same beam body turned upside down. It is a perspective view of the cylindrical pillar which is a structural member of the filler. It is a perspective view of the semi-cylindrical pillar which is a structural member of the filler. It is a perspective view of the quarter cylinder column which is a constituent member of the filler. It is a perspective view of the baseplate used for the filling structure of the underground water tank which concerns on this invention. (A) is an expanded partial perspective view which shows the state before attaching a side plate to a beam body, (b) is an enlarged partial perspective view which shows the state after attaching a side plate to a beam body. It is a perspective view which shows the place which has arrange | positioned the cylindrical pillar, the semi-cylindrical pillar, and the quarter-cylindrical pillar to the baseplate arranged in the front and rear, right and left. It is a perspective view explaining how to assemble a filling structure using the filler according to the present invention. It is a schematic whole figure which shows the filling structure of the underground water tank which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Beam body 1a Large-diameter annular groove 1b Large-diameter quarter-annular groove 1c Small-diameter annular groove 1d Small-diameter quarter-annular groove 1h Opening 1i Notch 2 Cylindrical column 2a Lower end fitting port of cylindrical column 2b Upper end fitting of cylindrical column Joint port 3 Semi-cylindrical column 3a Lower end fitting port of semi-cylindrical column 3b Upper end fitting port of semi-cylindrical column 4 Quarter tubular column 4a Lower end fitting port of quarter cylindrical column 4b Upper end fitting port of quarter cylindrical column 5 Bottom plate 5a Large-diameter annular groove 5b in the bottom plate 5b Semi-circular groove in the large-diameter bottom plate 5e Engaging projection 6 Side plate 7 Top plate 10 Inflow pipe 11 Outflow pipe 12 Vertical pipe with a lid as an inspection port

Claims (7)

A synthetic resin cylindrical column having a large-diameter lower end fitting port and a small-diameter upper end fitting port, a synthetic resin semi-cylindrical column having a shape obtained by dividing the cylindrical column into left and right parts, and the above cylinder A filling material having a synthetic resin quarter-cylindrical column that is formed by dividing a cylindrical column into front, rear, left and right, and a synthetic resin rectangular beam, excluding the four corners of the beam A large-diameter annular groove for fitting the lower end fitting opening of the cylindrical column is formed on the upper surface, and a large diameter obtained by dividing the large-diameter annular groove into four equal parts on the upper surface of the four corners of the beam body. A small-diameter annular groove for fitting the upper end fitting port of the cylindrical column is formed concentrically with the large-diameter annular groove on the lower surface excluding the four corners of the beam body, On the lower surface of the four corners of the beam body, a small-diameter quarter-annular groove formed by equally dividing the small-diameter annular groove is formed concentrically with the large-diameter quarter-annular groove, and is formed on the side frame of the beam body. Is Fillers underground water tank, wherein a concave portion of the arcuate is formed.   The filler for a groundwater tank according to claim 1, wherein the beam body has a square planar shape, and a large-diameter annular groove and a small-diameter annular groove are formed on an upper surface and a lower surface of a central portion thereof.   The filling material for a groundwater tank according to claim 1 or 2, wherein an opening is formed inside the small-diameter annular groove of the beam body.   The filling material for a groundwater tank according to any one of claims 1 to 3, wherein a notch for engaging an engagement protrusion of a side plate is formed on four sides of the beam body.   Using the groundwater tank filler according to any one of claims 1 to 4, the cylindrical column, the semicylindrical column, and the quarter cylindrical column are arranged on the bottom plate of the underground water tank, A small-diameter ring formed by merging beam bodies in the front-rear and left-right directions, and combining the small-diameter annular grooves of each beam body and the small-diameter quarter-annular grooves at the corners of the four beams adjacent to the shape of the "field". Fit the upper end fitting port of the cylindrical column into the groove from below, and move the upper end fitting port of the quarter cylindrical column downward into the small-diameter quarter annular groove located at the corner of the aggregate of beams arranged side by side A semi-cylindrical column in a small-diameter semi-annular groove formed by combining small-diameter quarter-annular grooves at the corners of two beam bodies adjacent to each other along the four sides of the aggregate of beam bodies The upper end fitting port of the beam body is fitted from below, and the cylindrical column, the semi-cylindrical column, and the quarter-cylindrical column are arranged on the aggregate of the beam bodies, and the large-diameter annular groove of each beam body, The lower end fitting opening of the cylindrical column is fitted from above into a large-diameter annular groove formed by combining large-diameter quarter-annular grooves at the corners of four beam bodies adjacent to each other in a letter shape. The lower end fitting opening of the quarter cylindrical column is fitted from above into a large-diameter quarter-annular groove located at the corner of the aggregate of the two, and the corners of two beam bodies adjacent to each other along the four sides of the aggregate of beam bodies The lower end fitting opening of the semi-cylindrical column is fitted from above into the large-diameter semi-annular groove formed by combining the large-diameter quarter-annular grooves at the corners. A structure for filling a groundwater tank, characterized in that side plates and a top plate are attached to the four side surfaces and the top surface of a three-dimensional structure in which the body is alternately stacked up to the height of the groundwater tank.   The bottom plate is a rectangular porous plate made of synthetic resin having dimensions substantially equal to the four sides of the beam body, and has a large diameter for fitting the lower end fitting opening of the cylindrical column to the upper surface excluding its four corners. An annular groove is formed, and a large-diameter quarter-annular groove is formed by dividing the large-diameter annular groove into four equal parts on the upper surface of the four corners. A large-diameter annular groove formed by combining the large-diameter annular grooves of each bottom plate and the quarter-annular grooves at the corners of the four bottom plates adjacent to each other in the shape of a “field”. The lower end fitting port of the cylindrical column is fitted from above, and the lower end fitting port of the quarter cylindrical column is fitted from above into the large-diameter quarter annular groove located at the corner of the aggregate of the bottom plates arranged side by side. A large-diameter semi-annular groove formed by combining the quarter-annular grooves at the corners of two bottom plates adjacent to each other along the four sides of the aggregate of the bottom plates, Filling structure underground water tank according to claim 5, the lower end fitting opening of the cylindrical column is fitted from above. The bottom plate is provided with engaging projections on its four sides, and is also used as a side plate. The filling structure of the underground water tank according to claim 6, which is attached by engaging the mating protrusion.

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