JP2007023578A - Storage facility for rainwater and the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide storage facilities for rainwater and the like, which can prevent a top board from being deformed and damaged, even if the depth (height) of a covering layer of storage facilities for rainwater and the like is set small, and which can minimize an increase in the costs of the top board and the whole of the facilities. <P>SOLUTION: In the storage facilities for rainwater and the like, a space holding skeleton 5, in which a plurality of resin skeleton blocks 4 comprising a support 11 and a planar rib 12 formed vertically to the support 11 at the end of the support 11 are vertically and horizontally assembled in the state of making the support 11 perpendicular, is arranged in a dug hole 2 which is provided by digging down the ground and the upper part of which is opened; a top surface of the skeleton 5 is covered with the plurality of top boards 6; and the covering layer 7 is provided on the top boards 6. The storage facilities for rainwater and the like are characterized as follows: a central part 6A of a surface of the top board 6 is higher than a peripheral part 6C thereof; and a recess 6B, the central part of which has the deepest part, is formed on the backside thereof. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a storage facility for rainwater or the like formed in a basement of a site such as a building or a housing complex, particularly a housing complex.

Conventionally, for example, in large buildings and housing estates, rainwater is used as fire prevention water, used for watering flower beds, vegetable gardens, etc., and connected to rivers to drain rainwater with a time difference, etc. For the purpose, for example, various attempts have been made to form a water storage tank in a vacant land around a building or housing complex, or in a basement of a bicycle storage, and to store rainwater or temporarily store it.
In particular, this type of storage facility is often provided when building a new housing complex in preparation for water shortages in the summer.

A typical example of this type is a storage facility described in Patent Document 1.
As shown in FIG. 8, the ground 1 is dug down in advance to form a trench 2 having a rectangular planar shape, and then the inner surface (including side and bottom) of the trench 2 is made of gravel, or When it is desired to prevent mud or the like from entering the inside of the pit 2 as much as possible, the lining layer 3 is formed by covering with a water-permeable sheet, a water-permeable sheet, or a semi-permeable sheet instead of gravel.
In addition, in the case of a storage facility that uses this storage facility for fire prevention or watering, when using a water-impervious sheet, or in an osmotic storage facility that drains rainwater with a time difference, The lining layer 3 is formed of gravel, a water-permeable sheet or a semi-permeable sheet.

When the lining layer 3 is formed, a resin skeleton block 4 as shown in FIG. 9, for example, is assembled vertically and horizontally, that is, vertically and horizontally, to form a space holding skeleton 5 having a water storage space therein.
Incidentally, the resin skeleton block 4 of FIG. 9 has a cylindrical support column 11 and a planar rib 12 formed at a right angle to the support column 11 at one end of the support column 11. Fit another resin skeleton block 4 with the skeleton block 4 upside down, and a fitting hole 14 into which the projection 13 formed on the end face of the support 11 and the projection 13 of the mating resin skeleton block 4 are fitted. Let them combine.

  When the space holding skeleton 5 is formed in the trench 2 by sequentially combining the resin skeleton blocks 4, finally, on the space holding skeleton 5, that is, on the uppermost resin skeleton block 4 as shown in FIG. A plurality of resin-made top plates 6 are laid, and as shown in FIG. 8, the top plate 6 is further covered with a water-impervious sheet or a semi-permeable sheet, and then soil is backfilled thereon to form a coating layer. 7 is formed. Incidentally, the depth H of the coating layer 7 is about 1 m in the prior art.

  In FIG. 8, reference numeral 8 denotes an inflow path for guiding rainwater to the pit 2, reference numeral 9 denotes a sedimentation tank for precipitating mud in rainwater flowing into the pit 2 from the inflow path 8, and reference numeral 10. Indicates a manhole cover placed on the settling tank 9.

  By the way, as the resin skeleton block 4, various shapes have been proposed in addition to the shapes described above, and any shape can form a water storage space as large as possible inside, and It is designed in consideration of at least three points: sufficient pressure resistance against pressure from above the coating layer 7 and easy assembly of the resin skeleton blocks 4.

JP-A 63-268823

In the conventional storage facility such as rainwater described in Patent Document 1, the depth (height) H of the coating layer 7 is about 1 m as described above. In view of the above, there is a demand for a depth (height) H of the coating layer 7 of about 60 cm.
By the way, when the depth (height) H of the covering layer 7 is made shallow, the weight (dead load) of the covering layer 7 loaded on the top plate 6 is reduced, but it moves on the storage facility, for example, as the ground surface approaches. On the contrary, the live load applied from an automobile or the like increases.

As shown in FIG. 11, the area to which the live load is applied is proportional to the depth from the ground surface 1 to the storage facility (the portion indicated by hatching). For example, in the case where the root of the live weight is the track 50, the influence range (area) of the live load continuously increases as the depth H from the ground surface increases like a cone having the track 50 as a vertex. . That active weighted impact area when of H ₁ depth from the surface is pi] r ₁ ^2, if the depth becomes that larger H ₂ will pi] r ₂ ^2. In other words, when the depth H is reduced by making the coating layer 7 shallow, the load area applied to the surface of the storage facility is reduced in proportion to the square of the depth H, and conversely, the load per unit area is the depth. It is known that it increases in inverse proportion to the square of H.

Therefore, when the covering layer 7 is shallow, an unexpectedly large live load is applied to the top plate 6 spread on the uppermost resin skeleton block 4 of the space holding skeleton 5 as shown in FIG. 6 is likely to be deformed or damaged. As a result, coupled with the fact that the depth H of the covering layer 7 is shallow, there is a possibility that a problem such as a dent in the asphalt on the ground surface occurs.
The simplest solution to this problem is to increase the thickness of the top plate 6, but simply increasing the thickness leads to an increase in the cost of the top plate 6, greatly increasing the cost of this type of rainwater storage facility as a whole. There is a problem that it will be raised.

  In view of the above problems, the object of the present invention is to prevent the top plate from being deformed or damaged even if the depth (height) of the covering layer in a storage facility such as rainwater is shallow, and the cost of the entire facility is minimized. It is to provide a storage facility for rainwater and the like that can be kept to a limit.

  In order to achieve the above-mentioned object, the rainwater storage facility according to claim 1 of the present invention is formed at right angles to the strut and the strut at the end of the strut in a trench hole opened by digging the ground. A plurality of resin skeleton blocks having planar ribs are assembled vertically and horizontally so that the pillars are vertical to form a space holding skeleton, and a plurality of top plates are spread on the upper surface of the space holding skeleton. In storage facilities such as rainwater with a coating layer on the plate, the top plate has a surface center portion that is higher than the peripheral portion, and a back surface that has a deepest recess at the center. It is characterized by being.

  According to the storage facility for rainwater and the like according to claim 1, the height of the center portion of the front surface is higher than the height of the peripheral portion as the top plate covering the space holding skeleton, and the center is provided on the back surface. By using one having a deepest recessed portion, the vertical load resistance of the top plate can be greatly increased, for example, even when the material weight is substantially the same as that of a conventional top plate. . As a result, even if the depth of the covering layer of the storage facility such as rainwater is reduced, not only the cost of the top plate but also the cost of the entire facility can be minimized.

  Further, the storage facility for rainwater or the like according to claim 2 includes a plurality of pillars and planar ribs formed at right angles to the pillars at the ends of the pillars, in a pit opened by digging the ground. A space holding skeleton is formed by assembling a resin skeleton block vertically and horizontally so that the pillars are vertical, and the space holding skeleton is surrounded by a side wall constituted by a plurality of side plates, and an upper surface of the space holding skeleton is formed. In a rainwater storage facility in which a plurality of top plates are laid on the top plate and a covering layer is provided on the top plate, at least the top plate of the side plates and the top plate has a height at the center of the surface. Further, a concave portion having a deepest portion at the center is formed on the back surface.

According to the storage facility for rainwater and the like according to claim 2 formed as described above, even if the space holding skeleton is covered with the side wall formed of the side plate, the invention according to claim 1 is used. The same effect can be expected, and if the same shape as the top plate is used not only for the top plate but also for the side plate, the side wall having the same strength as when the side wall is formed with a normal flat plate side plate is made thicker. Therefore, the cost of the entire storage facility such as rainwater can be reduced.
Of course, if the side plate is formed with the same thickness as the conventional one, it is possible to obtain a storage facility such as rainwater that is more resistant to side pressure.

  Furthermore, the storage facility for rainwater or the like according to claim 3 is the storage facility for rainwater or the like according to claim 1 or 2, wherein the top plate has four resin skeleton blocks each having four corners adjacent to each other. It is characterized by being spread on the space holding skeleton so as to partially cover each column end.

  According to the rainwater storage facility according to claim 3, the four corners of each top plate partially connect the respective column end portions of the four adjacent resin skeleton blocks constituting the uppermost stage of the space holding skeleton. Since it is laid on the space holding skeleton so as to cover, the load load applied to the top plate is mainly applied to the strongest strut portion in the resin skeleton block, so the live load It is possible to prevent the planar ribs of the resin skeleton block from being more effectively prevented by such a load, which is preferable.

  As described above, according to the storage facility for rainwater and the like of the present invention, damage to the top plate can be prevented even when the depth (height) of the covering layer in the storage facility for rainwater or the like is reduced, and the cost of the entire facility is reduced. Up can also be minimized.

  Hereinafter, embodiments of a water storage facility such as rainwater according to the present invention will be described in detail with reference to the drawings. In addition, since the storage facilities such as rainwater are basically the same as the conventional one except for the top plate and the side plates constituting the side walls, drawings of the entire facility are omitted.

FIG. 1 shows an embodiment of a top plate used in a storage facility for rainwater or the like according to the present invention. FIG. 1 (a) is a plan view of the top plate 6, and FIG. 1 (b) is FIG. It is AA sectional drawing.
As shown in FIG. 1, the top plate 6 used in the storage facility for rainwater or the like of the present invention is formed such that the height of the front surface center portion 6A is higher than the height of the peripheral portion 6C, and on the back surface. A recess 6B having a deepest portion is formed at the center.
In this way, in the top plate 6 having a substantially arcuate cross section in which the concave portion 6B is formed on the back surface and the center of the front surface is raised, for example, the basis weight of the material is substantially the same as that of the conventional top plate 6. Even if it forms, the load resistance with respect to the force applied to the top plate 6 from the arrow direction in FIG. 1B, that is, the force F applied to the surface of the top plate 6 from the vertical direction can be increased. Therefore, even if the coating layer 7 is made thin, the top plate 6 shown in FIG. 1 can be used sufficiently, and this top plate 6 can be handled without much concern about the cost of the top plate 6 and finally the cost of the entire facility. The plate 6 can be spread on the space holding skeleton 5.

Of course, the thickness of the top plate 6 shown in FIG. 1 may be adjusted in consideration of the value of the depth H of the covering layer, the type of automobile passing through the ground surface, specifically the possibility of passing a large vehicle. .
In any case, according to the present invention, the thickness is not so thick as that of the simply flat plate 6 that has been conventionally used, that is, the cost of the entire storage facility such as rain water is not much concerned. , Can cope with the increase in live weight.

FIG. 2 shows another embodiment of the top plate 6 used in the storage facility for rainwater and the like according to the present invention. FIG. 2 (a) is a plan view and FIG. 2 (b) is an A- It is A sectional drawing.
The top plate 6 shown in FIG. 2 is similar to that shown in FIG. 1 in that the height of the front surface center portion 6A is higher than the height of the peripheral portion 6C, and the back surface has the deepest portion at the center portion. The recessed part 6B which has is formed. The difference from FIG. 1 is that the recess 6B in FIG. 1 is a pyramid, while the one in FIG. 2 is hemispherical, otherwise the two are basically the same. It is. Note that the load resistance against the vertical force of the top plate 6 is better for the one shown in FIG. 2 than for the one shown in FIG.
Here, the meaning of the center part in the present invention includes not only the meaning of the center part but also the meaning of the center part.

  When the top plate 6 shown in FIGS. 1 and 2 is laid on one resin skeleton block 4 as shown in FIG. 10 as described above, the center portion of the bottom surface of the top plate 6 is recessed. Therefore, the load applied to the resin skeleton block 4 via the top plate 6 is not the strut 11 having a relatively strong strength in the resin skeleton block 4 but the planar rib 12 having a relatively weak peripheral portion. Hang mainly on the side. Therefore, in order to protect the planar rib 12 from overload, it is necessary to take measures such as simply increasing the thickness of the planar rib 12, but this causes an increase in the cost of the storage facility such as rainwater. End up.

Therefore, as shown in FIG. 3, the top plate 6 is arranged in a so-called zigzag pattern on the uppermost resin skeleton block 4 of the space holding skeleton 5. That is, the four corners of each top plate 6 are laid so as to cover a part of each end face of the column 11 of the four resin skeleton blocks 4 adjacent to each other, more specifically about 1/4 each of the end surfaces of the column 11. That's fine.
Incidentally, as shown in FIG. 4, the top plate 6 used in FIG. 3 has a recess 6 </ b> B at the center and fitting projections 6 </ b> D at the four corners. These fitting projections 6D fix the top plate 6 so that the top plate 6 does not move on the planar ribs 12 of the resin skeleton block 4 when the top plate 6 is laid on the uppermost resin skeleton block 4 of the space holding skeleton 5. Therefore, a fitting hole 15 into which the fitting projection 6D is fitted is provided on the resin skeleton block 4 side. Of course, it goes without saying that a fitting hole may be formed on the top plate 6 side instead of the fitting projection 6D, and a fitting projection may be provided on the resin framework block 4 side.

Note that the fitting hole 15 does not need to be a tight fitting hole in which the fitting protrusion 6D fits almost without a gap, and may be a hole that is somewhat large and loosely fitted.
In FIG. 3, the top plate 6 is indicated by a solid line, and the resin skeleton block 4 located under the top plate 6 is indicated by a one-dot chain line.

FIG. 5 is a cross-sectional view taken along the line BB in FIG. 3 and shows only one top plate 6 for easy understanding.
By the way, in the BB cross section, the fitting protrusion 6D and the fitting hole 15 do not actually appear, and the relationship between the two is difficult to understand. Therefore, the fitting state between the resin skeleton block 4 and the top plate 6 will be explained in an easy-to-understand manner. Therefore, these fitting projections 6D and fitting holes 15 are drawn in FIG.
As shown in FIG. 5 and FIG. 3 described above, if the top plate 6 is laid in a staggered pattern on the planar ribs 12 of the resin skeleton block 4 positioned at the uppermost stage of the space holding skeleton 5, The peripheral portion 6 </ b> C covers about ¼ of each column 11 of the adjacent resin skeleton block 4, and the dead load and the live load of the resin skeleton block 4 excellent in load resistance are passed through the top plate 6. It mainly acts on the column 11.
As a result, the load applied to the planar ribs 12 of the resin skeleton block 4 is reduced, and the planar ribs 12 are less likely to be damaged.

Furthermore, in order to more reliably transmit the load applied to the top plate 6 to the support 11 of the resin skeleton block 4, rectangular feet 6E are provided at the four corners on the lower surface of the resin skeleton block 4, as shown in FIG. What is necessary is just to provide. By the way, the size of the foot 6E is set so as to cover ¼ of the column 11 of the resin skeleton block 4.
The top plate 6 may be laid so that the foot portion 6E is positioned on the column 11 of the four resin skeleton blocks 4 adjacent to each other and covers a quarter of the column 11.

Since the shape of the top plate 6 as shown in FIGS. 1, 2 and 6 is excellent in load bearing strength, for example, as shown in FIG. Instead of the tension layer 3, the shape of the top plate 6 can be adopted for the side plate 30 of a storage facility such as rainwater in which a plurality of flat side plates 30 made of resin are assembled to form a side wall 31. .
For example, a plurality of side plates 30 having a shape as shown in FIG. 2 are connected in a horizontal and vertical direction to form the side wall 31 so that the recess 6B side is on the space holding skeleton 5 side, that is, the inside of a storage facility such as rainwater. To do. In this way, the side wall 31 that can sufficiently withstand the side pressure such as the surrounding earth and sand and water pressure can be formed without using the side plate 30 that is too thick.

  By the way, as a material of the top plate 6 and the side plate 30 described above, resins are generally used, for example, polypropylene is typical, and various additives are added to these resins in order to improve mechanical strength or enhance durability. An agent such as coal ash (also referred to as fly ash) may be added.

  Moreover, in the top plate 6 or the side plate 30 of the present invention, a portion having a high height including the center portion 6A on the surface side of another top plate 6 or the side plate 30 is fitted into the recess 6B provided on the back surface. In this case, a plurality of these top plates 6 and side plates 30 can be stably stacked. Therefore, there is an advantage that the top plate 6 and the side plate 30 can be transported without collapsing when the top plate 6 and the side plate 30 are transported.

As described above, the top plate and the side plate having a cross-sectional arch shape in which the concave portion is formed on the back surface and the center portion of the front surface is raised, for example, it is formed with substantially the same material weight as the conventional top plate and side plate. In addition, the load resistance strength against the force applied from the direction perpendicular to the thickness direction of the top plate or the side plate, that is, the respective surfaces of the top plate or the side plate can be increased. Therefore, even if the depth of the covering layer is made shallow in a storage facility such as rainwater, it can be adequately handled without worrying about damage with the top plate shown in FIG.
Moreover, the top plate can be laid on the space holding skeleton, or the side wall can be formed of the side plate without worrying too much about the cost of the top plate or the side plate, and finally the cost of the entire facility. .

  As described above, according to the present invention, even when the depth (height) of the covering layer in a storage facility such as rainwater is shallow, the top plate can be prevented from being deformed or damaged, and a side plate excellent in load resistance is provided. In addition, it is possible to provide a storage facility such as rainwater that can minimize the cost increase of the top plate and the side plate and the cost increase of the entire facility.

The one Example of the top plate used for storage facilities, such as rainwater of this invention, is shown, (a) is a top view, (b) is AA sectional drawing of (a). The other Example of the top plate used for storage facilities, such as rainwater of this invention, is shown, (a) is a top view, (b) is AA sectional drawing of (a). It is a partial top view which shows the state which spread the top plate of this invention on the uppermost resin frame blocks of a space holding frame. It is a bottom view of the top plate used in FIG. It is BB sectional drawing in FIG. The further another Example of the top plate used for storage facilities, such as rain water of this invention, is shown, (a) is sectional drawing, (b) is a bottom view. It is a partial cross section figure which shows another Example of storage facilities, such as rain water of this invention. It is sectional drawing which shows an example of the storage facilities, such as the conventional rain water with which this invention relates. It is a perspective view which shows an example of the resin-made frame | skeleton blocks used for storage facilities, such as rainwater of this invention. It is a partial cross section figure which shows the relationship between the resin-made frame | skeleton blocks in FIG. 8, and a top plate. It is the schematic which shows the state in which the live load from a motor vehicle is loaded on storage facilities, such as rainwater.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 2 Groove hole 3 Lining layer 4 Resin frame | skeleton block 6 Top plate 6A Center part 6B Recessed part 6C Peripheral part 6D Fitting protrusion 7 Covering layer 11 Support | pillar 12 Planar rib 30 Side plate 31 Side wall

Claims (3)

  A plurality of resin skeleton blocks each having a pillar and a planar rib formed at right angles to the pillar at the end of the pillar in a pit opened by digging up the ground are arranged so that the pillars are vertical. In a storage facility such as rainwater in which a space retaining skeleton is formed by vertically and horizontally forming a plurality of top plates on the top surface of the space retaining skeleton and a covering layer is provided on the top plate, the top plate A storage facility for rainwater or the like, wherein a height of a central portion is higher than a height of a peripheral portion, and a concave portion having a deepest portion in the central portion is formed on the back surface.   A plurality of resin skeleton blocks each having a column and a planar rib formed at right angles to the column at the end of the column in a hole formed by digging down the ground and opened at the top are arranged so that the column is vertical. Forming a space holding skeleton by vertically and horizontally, surrounding the space holding skeleton with a side wall composed of a plurality of side plates, and laying a plurality of top plates on the top surface of the space holding skeleton, In a rainwater storage facility provided with a coating layer on at least the side plate and the top plate, at least the top plate has a height at the center of the front surface higher than the height of the peripheral portion, and the back surface is deepest in the center at the center. A storage facility for rainwater or the like, wherein a recess having a portion is formed.   The said top plate is spread | laid on the said space holding | maintenance frame | skeleton so that each four corners may each partially cover each support | pillar end part of the said resin frame | skeleton block. The storage facility for rainwater or the like according to any one of 2 above.

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