JP4509853B2 - Rainwater underground storage and penetration tank - Google Patents

Description

  The present invention relates to a tank structure for storing rainwater underground and infiltrating it into the ground.

In residential areas on the outskirts of cities, rainwater is stored to control the inflow of rainwater into the river in order to prevent the inundation of rainwater into the river due to torrential rain. In some cases, a storage tank is installed in the basement for infiltration into the basement.
As such a storage tank 100, for example, as shown in FIG. 7, a hollow frame body 101 is stacked in a hole formed by digging down the ground to form a rainwater storage space. There is known a structure in which rainwater is poured from an inflow path 102 that leads to the drainage, and when the rainwater flows beyond the capacity of the storage space, the stored rainwater is discharged from the discharge path 103 (see, for example, Patent Document 1).

Japanese Patent Publication No. 4-35580

In the illustrated conventional storage tank 100, the inflow path 102 is connected to the storage tank 100 as it is, and no sedimentation separation layer or screen is provided in front of the storage tank 100. , Dirt and other contaminants were easy to flow into the tank. For this reason, a sludge pit for depositing contaminants is provided at the bottom of the tank, and a manhole using a frame member of about 1 m × 1 m square is formed on the pit. It has been generally done to get down to the sludge pit, and enter the tank to discharge the accumulated impurities.
However, the construction of assembling the manhole inside the tank using the frame member is a large-scale work, and therefore, the installation period of the storage tank is lengthened, which has been a factor of increasing the construction cost.

  In view of such a problem of the prior art, the present invention configures a storage tank so that an operator can remove contaminants that have entered the tank without entering the tank. The objective is to shorten the installation period.

  The size of each dust, dead leaves, earth and sand, etc. entering the tank is extremely small, and it can be pumped up with a suction hose even if the worker does not enter the tank. It is also possible to confirm using this camera. Therefore, if it is provided so that the foreign matter settles and accumulates in a predetermined place inside the tank, it is possible to remove the accumulated foreign matter with the suction hose even if the operator does not bother to enter the tank. is there.

  Therefore, the present invention forms a space part by digging the ground, laying a plurality of frame units in this space part and stacking up near the ground surface to form a rainwater storage tank, A sludge pit is provided at an appropriate position on the bottom of the bottom, and a hooked short pipe is fixed to the upper surface of the uppermost frame unit stacked on the sludge pit. The upper part was closed with a detachable lid.

As a frame unit constituting the storage tank according to the present invention, a suction hose can be inserted into the tank from a short tube with a hook in a stacked state, and the tip of the suction hose can be inserted into a sludge pit on the bottom of the tank It is preferable to use a configuration that has openings that penetrate the top and bottom of the unit, and that the openings of the frame unit at each stage are continuous along the vertical direction when the units are stacked in multiple stages. .
In addition, the inlet of the storage tank connected to the rainwater inflow passage and the drain of the storage tank connected to the rainwater discharge passage can also be formed by connecting a hooked tube to the opening provided on the side of the tank. .

  According to this, the foreign substance which flowed into the storage tank with rainwater settles in the tank, and settles in the sludge pit provided in the bottom face. Then, if the lid of the short tube with a hook is removed and a suction hose is inserted into the tank from the short tube, the foreign matter accumulated in the sludge pit can be sucked and removed by the suction hose. The short pipe may be large enough to allow the suction hose to be inserted, and there is no need to assemble a manhole that allows an operator to enter the tank as in the prior art.

A preferred embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing a storage tank according to an embodiment of the present invention with a half surface cut away, FIG. 2 is a view showing a plane and a side of a frame unit constituting the storage tank, and FIG. The figure which showed the plane and side of the flat plate attached to a surrounding surface, FIG. 4 is a figure for demonstrating the construction procedure of a storage tank, FIG. 5 showed the connection part of the uppermost frame unit and a short tube with a hook. FIG. 6 and FIG. 6 are views showing a connecting portion between the flanged tubular body and the frame body constituting the rainwater inlet of the storage tank.

  The illustrated storage tank 1 is formed by stacking frame units 2 in multiple stages on a space formed by digging the ground and covering the periphery of the frame units 2 stacked together with a water-permeable protective sheet 4. The rainwater inflow channel 5 is connected to the upper part of the side surface on one side of the tank, the rainwater discharge channel 6 is connected to the lower part of the side surface of the other side, and rainwater is introduced into the tank from the rainwater inflow channel 5 and stored in the space inside the tank. Then, the stored rainwater is allowed to permeate into the ground from the protective sheet 4 and can be discharged from the rainwater discharge channel 6 to the sewer channel. Instead of the water-permeable protective sheet 4, the water-impervious protective sheet 4 may be used, or both members may be used in combination.

  Further, a flanged short tube 7 communicating with the inside of the tank is projected to the vicinity of the ground on the upper surface of the tank, and the upper portion of the short tube 7 is supported by a frame 9 supported by a base 8 fixed in the ground. The periphery is covered, and the upper end of the short tube 7 is closed with a lid 10 provided on the top of the frame 9. In addition, a sludge pit 11 is provided on the bottom surface of the tank vertically below the short pipe 7 for depositing impurities that have flowed into the tank together with rainwater.

  As shown in FIG. 2, the frame body unit 2 is formed by arranging a plurality of hollow legs 2b on the lower surface of a substrate 2a having a size of about 50 cm square, and other substrates are formed on the substrate 2a. The frame unit 2 is provided so that it can be stacked in multiple stages. In addition, the substrate 2a has a plurality of openings 2c having an opening diameter of about 10 to 20 cm. With the frame units 2 stacked in multiple stages, the openings 2c at each stage are connected along the vertical direction. From the top to the bottom of the storage tank 2 passes through each opening 2c.

  The lowermost frame unit 2 has a leg 3b vertically supported by a flat plate 3 having a large number of pores formed on the surface thereof, as shown in FIG. The flat plate 3 is also integrally attached to the side portion and the upper portion of the frame unit 2 formed.

  The procedure for stacking the frame units 2 to form the storage tank 1 is performed as follows.

  As shown in FIG. 4, first, the ground of the place where the storage tank 1 is installed is dug down to form a space that is large enough to embed the storage tank 1 (FIG. 4A). Next, the sludge pit 11 is formed on the bottom surface of the space portion, and the protective sheet 4 is laid in the space portion after the bottom surface is leveled ((B) in the figure).

  Then, the flat plate 3 is laid on the protective sheet 4, and the frame unit 2 is laid on the protective sheet 4 ((C) in the figure). Thereafter, while the frame units 2 are stacked in multiple stages, the front and rear, left and right frame units 2 are connected together using a connector, and the flat plate 3 is attached to the surface of the outermost frame unit 2. Then, if the frame units 2 are stacked in multiple stages, the flat plate 3 is also stacked and attached on the substrate 2a of the uppermost frame unit 2.

  In addition, a hooked pipe body 12, 12 is attached to a portion of the storage tank 1 where the rainwater inflow passage 5 and the rainwater discharge passage 6 are connected, and is a top portion of the storage tank 2 and above the sludge pit 11. At the position, a short tube 7 with a flange is attached, and then the frame unit 2 and the flat plate 3 stacked in multiple stages are covered with a protective sheet 4 (FIG. 4D).

The flanged short tube 7 is obtained by opening the opening 3a in the flat plate 3 and then connecting the short tube. The attachment of the flanged short tube 7 is performed at the top of the storage tank 2 as shown in FIG. The flat plate 3 is bonded and joined to the opening 2c of the frame unit 2. If the short tube 7 is attached, the protective sheet 4 is covered so that the surface may be covered.
Similarly, the flanged tubular bodies 12 and 12 are integrally formed with the flat plate 3 having the opening 3a, and the attachment thereof is also the frame on the outermost peripheral side of the storage tank 2 as shown in FIG. The flat plate 3 is bonded and bonded to the side surface of the unit 2, and the protective sheet 4 is placed on the surface so as to cover the tubular bodies 12 and 12.

  If the storage tank 1 whose surface is covered with the protective sheet 4 is configured in the dug space, after connecting the rainwater inflow passage 5 and the rainwater discharge passage 6 to the flanged pipe bodies 12 and 12, respectively, The surroundings are backfilled ((E) in the same figure), the upper part of the short pipe 7 protruding above the storage tank 1 is covered with a frame 9, and the short pipe 7 is closed with a lid 10, whereby the storage tank 1 Installation is completed.

According to the storage tank 1 of this embodiment configured as described above, the contaminants that flow into the tank together with the rainwater from the rainwater inflow path 5 settle in the tank and settle in the sludge pit 11 provided on the bottom surface. . Then, if the lid 10 is removed and the suction hose is inserted into the short tube 7 from the ground, the tip of the suction hose reaches the sludge pit 11 through the opening 2c of the frame unit 2 of each stage, and enters the pit. It is possible to suck and remove the accumulated impurities.
In this case, the short pipe 7 can be of a size that allows the suction hose to be inserted, that is, the opening diameter of the short pipe 7 is substantially the same as that of the opening 2c. It can be attached with. Since it is possible to remove the contaminants of the tank material with the suction hose through the short pipe 7, it is not necessary to assemble a manhole that allows workers to enter the tank as in the prior art, and therefore the installation period of the storage tank 1 is long. The construction cost can be reduced.

  In addition, the form of the illustrated facility is an example, and the present invention is not limited to the illustrated form, and can be configured in other appropriate forms.

It is the schematic sectional drawing which fractured and showed the half surface of the storage tank of one embodiment of the present invention. It is the figure which showed the plane (A) and side surface (B) of the frame unit which comprise the storage tank of FIG. It is the figure which showed the plane (A) and side surface (B) of the flat plate attached to the surrounding surface of the storage tank of FIG. It is a figure for demonstrating the construction procedure of a storage tank. It is the figure which showed the connection part of the uppermost frame unit and the short tube with a hook. It is the figure which showed the connection part of the tubular body and the frame unit which comprise the rainwater inflow port of a storage tank. It is sectional drawing which shows the structure of the conventional underground storage facility.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage tank, 2 Frame unit, 3 Flat plate, 4 Protection sheet, 5 Rain water inflow path, 6 Rain water discharge path, 7 Short pipe with a hook, 8 Base, 9 Frame, 10 Cover body, 11 Sludge pit, 12 Tube body

Claims (1)

Underground storage penetration tank that dug down the ground to form a space, laying a plurality of frame units in this space and stacking up near the ground surface to form a rainwater storage tank,
A sludge pit is provided at an appropriate position on the bottom of the space, and a hooked short pipe is fixed to the upper surface of the uppermost frame unit stacked on the sludge pit. A rainwater underground storage and penetration tank characterized in that the upper part is closed with a detachable lid.

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