JP2007169938A - Rainwater storage permeating facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a novel method for receiving horizontal earth pressure applied to a rainwater storage permeating facility formed by arranging a storage member. <P>SOLUTION: A storage tank or a permeating tank forms a storage space by covering the periphery with a sheet by assembling storage blocks in an underground space. The storage tank or the permeating tank is characterized by receiving the horizontal earth pressure applied to the tank by a passage, by replacing a storage block part of a peripheral part of the storage space with the passage composed of a material having strength rising from a base of the storage space. The horizontal earth pressure applied to the facility is received by forming a lower layer part of the tank as the passage. The passage is used for a mud reserving part or an inspection. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention belongs to a technique related to a method for reducing horizontal earth pressure applied to an underground rainwater storage and penetration facility.

For the purpose of controlling the outflow of rainwater, storage and infiltration facilities that store containers or table-shaped members made of plastic or other storage materials in the basement to secure storage space and temporarily store rainwater have become widespread. Yes. For this purpose, various shapes of storage members are disclosed in, for example, JP-A-62-101097, JP-A-62-126179, JP-A-9-296486, JP-A-11-43971, JP-A-10-115778, JP-A-10-115. Proposed and used in 252108. An example of these is shown in FIG. Both methods arrange the members, connect them with the necessary joints etc. according to the shape of the member to be used, wrap the surroundings with water permeable or water impervious sheets, inflow pipe, overflow pipe, mud bowl, Ancillary facilities such as an orifice dredger are provided, and a storage and penetration facility for storing rainwater in the internal space is provided.
In order to control the outflow of rainwater, wrap it in a permeable sheet when the groundwater level is low, and gradually infiltrate the stored rainwater into the basement so that the groundwater does not enter inside when the groundwater level is high. Wrapped in a water-impervious sheet, and after receiving rainwater in the tank, it is gradually discharged into sewage or rivers. These members have also been proposed for use as lightweight embankment materials and the like.
Tanks that use these storage members may have problems with internal cleaning, such as internal inspection or when storing sewage other than rainwater. As disclosed in Japanese Patent Application Laid-Open No. 2004-092334, there is also a proposal to provide an inspection passage inside the storage space for the purpose of internal inspection of these storage and penetration facilities. In addition, as shown in FIG. 5 disclosed in Japanese Patent Application Laid-Open No. 2001-090167, there is also proposed a device provided with a space for storing mud in the lower part.

These members are sufficiently durable for normal use, but generally the horizontal strength tends to be lower than the vertical strength. There are cases where the earth pressure applied from the horizontal direction is insufficient for installation in places where the burial depth is high. Japanese Patent Laid-Open No. 2000-326722 and Japanese Patent Laid-Open No. 2000-381582 provide a tank with a slope so that the side surface of the tank is narrowed toward the bottom to reduce horizontal earth pressure, or a tank of the type disclosed in Japanese Patent Laid-Open No. 10-252108 There are methods such as adding horizontal reinforcement. However, the method using a horizontal reinforcing material is not applicable to all the above members.
JP 62-101097 JP-A 62-126179 JP-A-9-296486 JP 11-43971 A JP 10-115778 JP 10-252108 A JP2000-326722 JP2000-381582 JP2004-092334 JP2001-090167

The present invention proposes a novel method for receiving horizontal earth pressure applied to a rainwater storage and infiltration facility formed by arranging a storage member.

The first aspect of the present invention is a rainwater storage and infiltration facility in which a storage member is assembled in an underground space, the periphery thereof is covered with a sheet and used as a storage space, and a storage block portion at the periphery of the storage space is raised from the base of the storage space; It is a rainwater storage and infiltration facility that receives horizontal earth pressure applied to the tank with the passage. By using the lower part of the facility as a passageway, it receives horizontal earth pressure applied to the facility in the passageway.
In the second aspect of the present invention, in the rainwater storage and infiltration facility, the passage is provided with an inlet and an outlet, the inlet is received from the outside, the outlet is an inlet into the tank, and the passage is a sand settling part. This is the rainwater storage and penetration facility.
Clean water is introduced into the facility by making the passage part a sand settling part.
The third aspect of the invention is the rainwater storage and penetration facility according to the above item 1, wherein the tank side wall surface on the tank side of the passage is provided with an inspection hole in the tank.

The present invention provides a horizontal lower layer portion of a storage space composed of a storage member that constitutes a storage and penetration facility such as rainwater provided in the basement by providing a concrete or strength fiber reinforced plastic passage and applying horizontal earth pressure on the tank side surface. Since it received, a high horizontal earth pressure is not directly applied to an internal storage member. Moreover, according to the objective, a channel | path can be used as a sedimentation part or a test | inspection channel | path.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a conceptual diagram of a rainwater storage and infiltration facility such as a storage tank or an infiltration tank that receives horizontal earth pressure applied to the facility with a passage according to the present invention. FIG. 1a is a cross-sectional view of the tank at line AB, and FIG. 1b is a plan view. As shown in the figure, the side surface of the lower layer of the tank is a passage.

The passage is made of concrete or a fiber-reinforced plastic having strength to withstand horizontal earth pressure. The width and height of the passage are preferably such that a person can pass through. Moreover, it is preferable that the base portion of the passage is provided deeper than the base of the tank of the facility. Water is introduced from an introduction port provided at one end of the passage, goes around the tank, and flows into the tank from a reception port provided in front of the partition wall before the introduction port shown in FIG. Sand mud suspended in the water during the round of the tank settles in the passage, and the remaining clean water flows into the tank. As shown in FIG. 4, the sand mud accumulated in the passage can be poured out from a discharge port provided in the lower portion of the passage or pumped out by a pump or the like.

FIG. 3 is a conceptual diagram of an example in which a passage is used for inspection. An inspection hole is appropriately provided on the tank side of the passage.
The present invention is not limited to rainwater storage and infiltration facilities, but can be applied to facilities that store or infiltrate water.
Depending on the type of the storage member, there is a case where the inside cannot be seen. In this case, the storage member is appropriately selected from the storage members shown in FIG.

It is a conceptual diagram which shows the horizontal earth pressure reduction method which provided the channel | path in the tank lower part side surface of this invention. It is a conceptual diagram which shows the method of using the channel | path of this invention as a muddy part. It is a conceptual diagram which shows the example which uses the channel | path of this invention for an inspection. The conceptual diagram of the tank which provided the muddy part at the tank lower part is shown. It shows the discharge hole of sand mud collected in the passage. The conceptual diagram of the conventional rainwater storage penetration facility is shown. The example of a storage member is shown.

Explanation of symbols

1 Passage 2 Storage Member 3 Inlet 4 Receiving Port 5 Inspection Hole 5 Discharge Hole

Claims (3)

In a rainwater storage and infiltration facility that assembles a storage member in an underground space and covers the periphery with a sheet as a storage space, the storage member in the periphery of the storage space is replaced with a passage made of a strong material rising from the base of the storage space The rainwater storage and infiltration facility is characterized by receiving horizontal earth pressure applied to the tank with the passage. The storage tank or infiltration tank according to claim 1, wherein an inlet and an outlet are provided in the passage, the inlet is received from the outside, the outlet is an inlet into the tank, and the passage is a sand settling part. The rainwater storage and penetration facility according to claim 1, wherein The rainwater storage and infiltration facility according to claim 1, wherein a hole for in-tank inspection is provided on a wall surface on the tank side of the passage.

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