JP2007002420A - Storage facility provided underground - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase earth pressure applied to the whole facility to reduce earth pressure to a large-sized storage part by taking a long distance to the top face form the surface of a small-sized storage part adjacent to the large-sized storage part, and integrally fixing the large-sized storage part and the small-sized storage part. <P>SOLUTION: The storage facility secures a storage space by providing an underground part below the underground water surface with an arranged body with unit members arranged longitudinally, laterally and vertically and connected, and covers the outer surface of the storage space with an impervious coating. The storage part is formed as the large-sized storage part 3, and the small-sized storage parts 4 smaller than the storage part are provided in approximately symmetric positions adjoining the large-sized storage part 3 so that a distance between the upper face and the ground surface is longer than a distance corresponding to the large-sized storage part. Fixing means 2 are provided to integrate the small-sized storage parts with the large-sized storage part, thereby taking countermeasures against buoyancy caused by underground water. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention belongs to a technique for taking measures against buoyancy caused by groundwater with respect to a storage facility provided underground.

For the purpose of controlling the outflow of rainwater, place container-like or pipe-like members made of plastic etc. in the basement and connect them using appropriate joints etc. as necessary or according to unit members to secure storage space Storage and penetration facilities that temporarily store rainwater are in widespread use. For this purpose, various shaped members have been proposed and used in, for example, Japanese Patent Laid-Open Nos. 62-101097, 62-126179, 9-296486, 11-43971, and 10-115778. Yes. Each method is a storage and penetration facility in which members are arranged, the periphery thereof is wrapped with a water-permeable or water-proof sheet, and rainwater is stored in the internal space.
Japanese Patent Laid-Open No. 8-244880 proposes that this facility is covered with a water-proof sheet to be used for storing liquids other than water, solids, and other articles.
If a facility is installed in a place where the groundwater level is high, buoyancy will be exerted on the facility by the groundwater, and if the countermeasures are insufficient, the entire facility may be lifted and damaged.
A general method for countermeasures to buoyancy is to provide a covering that can counteract buoyancy and suppress buoyancy by the weight of the soil.

The present invention proposes the use of a new covering that is different from the conventional method, although there is no difference from the conventional method in that the countermeasure for buoyancy is based on the covering.

JP 62-101097 JP-A 62-126179 JP-A-9-296486 JP 11-43971 A JP 10-115778 JP-A-8-244880

This invention exists in the proposal of the buoyancy countermeasure means with respect to an underground storage facility.

In the first aspect of the present invention, a storage space is secured by providing an arrangement in which unit members are arranged vertically and horizontally in the basement below the groundwater surface, and the outer surface of the storage space is covered with a water shielding film. In a facility, the storage unit is a large storage unit, a small storage unit that is adjacent to the large storage unit and is smaller than the storage unit at a substantially symmetrical position, and the distance between the upper surface and the ground surface is a large storage unit. The storage facility is provided in the basement as a countermeasure against buoyancy caused by groundwater provided with a fixing means so as to be integrated with the large-sized storage unit.
The second aspect of the present invention is a storage facility having a storage unit provided in a basement below the groundwater surface, wherein the storage unit is a large storage unit, adjacent to the large storage unit, and in a substantially symmetrical position. Due to the groundwater provided with a small storage part smaller than the part so that the distance between the upper surface and the ground surface is larger than the distance corresponding to the large storage part, and provided with a fixing means integrated with the large storage part It is a storage facility in the basement that measures for buoyancy are taken.
By increasing the distance to the upper surface of the small storage section adjacent to the large storage section and fixing the large storage section and the small storage section together, the earth pressure applied to the entire facility is increased, and the large storage section is To reduce earth pressure.

The present invention increases the earth pressure applied to the entire facility by increasing the distance from the upper surface of the small storage unit adjacent to the large storage unit to the ground surface, and fixing the large storage unit and the small storage unit integrally. The earth pressure for the large storage is reduced. By reducing the earth covering above the large storage unit, that is, by reducing the distance from the ground surface to the large storage unit, the convenience of the large storage unit is improved.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 and FIG. 2 are conceptual diagrams showing a storage facility provided in the basement where measures against buoyancy caused by the groundwater of the present invention are taken. FIG. 1 shows an example in which a small storage part is provided so as to be symmetrical on both sides of a large storage part, and a band is used as a fixing means for integrating the large storage part and the small storage part. FIG. 2 shows a small storage part that is symmetrical on both sides of the large storage part, and as a fixing means for integrating the large storage part and the small storage part, a fixing angle that covers both is assembled with concrete and fixed with an anchor, for example. It is an example. FIG. 3 is an example of a unit member that is arranged and connected to fill a large storage unit and a small storage unit.

The figure shows an example in which water is introduced into the small storage unit to reduce the influence of buoyancy, but even if the small storage unit is empty, the distance between the ceiling and the surface of each tank, storage Numerical values such as the distance from the bottom of the section to the groundwater surface should be within a predetermined range.

Also, in the figure, the bottom surfaces of the large storage unit and the small storage unit are the same, but even if the small storage unit is fixed at an intermediate position of the large storage unit, earth pressure and buoyancy applied to the entire storage unit As long as the value is within a predetermined range, there is no problem.

The small storage section may be provided symmetrically or around the large storage section.

FIG. 3 shows an example of a unit member arranged and connected in the large storage unit and the small storage unit. The shape of the member is not particularly limited, but can be changed as appropriate according to the type of article to be stored.

The material of the band for fixing the large storage portion and the small storage portion is not limited as long as it is a material that is stable and maintains strength in the ground, such as a resin such as aramid or a metal such as stainless steel.

Concrete, resin or rubber sheet can be used as the water-impervious coating.
When concrete is used, it is not particularly necessary to connect and arrange unit members inside the concrete.

The distance from the ceiling to the surface of the large storage unit is h1, the height of the large storage unit is h2, the height of the small storage unit is h3, the distance from the bottom of the storage unit to the groundwater level is h4, If the bottom length is W and the bottom length of the small storage is w, the size of the buoyancy per unit length of this storage facility is:
Buoyancy = (W + 2w) xh4 (The specific gravity of water is 1.)
The earth pressure per unit length of the facility is:
Earth pressure: h1xW xρ + 2w (h1 + h2−h3) xρ Here, the specific gravity of soil is ρ and the specific gravity of water is 1.
Therefore, the conditions for earth pressure> buoyancy are:
h1xWxρ + 2w (h1 + h2-h3) xρ> (W + 2w) xh4
(H1xW + 2w (h1 + h2-h3)) xρ / (W + 2w)> h4
Within the range that satisfies the following conditions.
If the same calculation is performed under conditions where water is added to the small storage unit, the necessary conditions are obtained as follows.
(H1xW + 2w (h1 + h2-h3)) xρ + 2wxh3 / (W + 2w)> h4

It is a conceptual diagram which shows this invention. It is another conceptual diagram which shows this invention. The example of the unit member arrange | positioned at the storage part of this invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixing means 2 Water shielding sheet 3 Large storage part 4 Small storage part

Claims (2)

In a storage facility where a storage space is secured by providing an arrangement in which the unit members are arranged vertically and horizontally below the groundwater surface, and the outer surface of the storage space is covered with a water-impervious film, the storage portion is A large-sized storage unit, a small-sized storage unit that is adjacent to the large-sized storage unit and is smaller than the storage unit in a substantially symmetrical position, and the distance between the upper surface and the ground surface is larger than the distance corresponding to the large-sized storage unit. A storage facility provided in the basement characterized in that it is a countermeasure against buoyancy caused by groundwater, characterized in that a fixing means is provided so as to be integrated with the large-sized storage unit. In a storage facility having a storage unit provided in a basement below the groundwater surface, the storage unit is a large storage unit, and is adjacent to the large storage unit and is smaller than the storage unit at a substantially symmetrical position. The buoyancy caused by groundwater is provided such that the distance between the upper surface and the ground surface is larger than the distance corresponding to the large storage section, and a fixing means integrated with the large storage section is provided. A storage facility in the basement characterized by

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