JP2013091503A - Tank having seismic isolation property and method to provide tank with seismic isolation property - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means to provide a tank, in which a combustible gas or liquid is stored, with a seismic isolation property and earthquake resistance.SOLUTION: In a tank which stores gas or liquid and is provided on the ground, a unit member aggregate, in which a unit member formed of a resin-made or a metal-made flexible raw material is connected to each other, is arranged in a vicinity of the periphery of the tank, which has the seismic isolation property. Even when a leg part of the tank is damaged to cause the tank to incline, the tank is wrapped with a unit member formed of a flexible raw material so that the outer wall of the tank is not damaged and earthquake energy is not transmitted directly to the tank.

Description

The present invention belongs to a technique for providing a seismic isolation function to a tank that stores gas and liquid.

The methods for seismic isolation and control of spherical tanks are disclosed in JP 06-156688, JP 2002-080090, and JP 2011-184056, a method of circulating an annular strip along the support legs, and energy absorption for connecting the support legs diagonally. Braces or composites of these have been proposed. Japanese Patent Application Laid-Open No. 2000-018321 proposes that a tank is divided vertically and a pendulum that vibrates in the XY directions is provided in a lower compartment. However, these means cannot be applied to soft ground or places where fluidization occurs due to earthquakes.
There is also a need for seismic and seismic isolation measures for tanks filled with dangerous materials in such places.

JP 06-156688 JP2002-080090 JP2011-184056 JP2000-018321

The present invention is a proposal of a tank for storing a combustible gaseous liquid and means for imparting seismic resistance.

In the first aspect of the present invention, in a tank provided on the ground for storing gas or liquid, a unit member assembly in which unit members made of a resin or metal and made of a flexible material are connected to each other in the vicinity of the tank. It is a tank with seismic isolation that arranges the body,
In the second aspect of the present invention, in a tank provided on the ground for storing gas or liquid, a unit member assembly in which unit members formed of a resin or metal and a flexible material are connected to each other in the vicinity of the periphery of the tank It is a method to give the tank seismic isolation by placing the body.
Even if the tank legs are damaged and the tank is tilted, the tank should be wrapped with a flexible unit so that the outer wall of the tank is not damaged and seismic energy is not directly transmitted to the tank. I tried to do it.

The seismic isolation tank of the present invention has the following effects because the unit member assembly in which unit members made of a resin or metal and made of a flexible material are connected to each other in the vicinity of the periphery of the tank. (1) Even if the unit member assembly provided in the surrounding area absorbs the energy of the earthquake and fluidization occurs in the tank foundation ground and the tank tilts, the unit member assembly is soft and does not cause damage to the receiving tank.

It is a conceptual diagram which shows the tank which added the seismic isolation function. It is a figure which shows the example of a unit member.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a conceptual diagram showing a tank to which a seismic isolation function is added. FIG. 1a is a plan view of the tank, and FIG. 1b shows a cross-sectional view.
As shown in the figure, the tank is surrounded by a unit member assembly. The unit member is a flexible metal or resin product, and is connected using a joint or without a joint depending on the shape of the unit member to form a unit member aggregate. Since the unit member has flexibility, the unit member assembly disposed near the periphery of the tank absorbs the energy of the earthquake and reduces the energy transmitted to the tank body.
Further, even if the tank is inclined due to a fluidization phenomenon caused by an earthquake, the unit member assembly is supported, and the damage of the tank can be prevented by the flexibility inherent to the unit member.

The unit member assembly can be filled with sand or the like. If it is as it is, it is difficult to close the sand tightly, but it is possible by surrounding the area with a water-permeable sheet and pouring a mixture of water and sand from the top. After excess moisture has escaped from the surrounding sheet, a mixture of water and sand can be poured. The strength of the unit member assembly is improved and the fire resistance is improved when a resin unit member is used. Although the foamed resin can be poured to harden the aggregate, there is a problem with fire resistance, so it is preferable to deposit as described below.

In the figure, up to about half of the tank is surrounded by the unit member assembly, but it may be arranged so as to cover the entire tank body.
If necessary, the assembly of unit members can be covered with a sheet, the surface of the assembly can be covered with soil, and the surface can be greened.

FIG. 2 is an example of a unit member used in the present invention. Unit members used for construction of facilities for controlling runoff of rainwater and the like can also be used for this purpose.

Can be used to provide seismic isolation for tanks that store flammable gases, liquids or hazardous materials.

1 Tank with seismic isolation function 2 Tank 3 Unit member assembly 4 Unit member

Claims (2)

In a tank provided on the ground where gas or liquid is stored, seismic isolation with a unit member assembly in which unit members made of resin or metal and made of flexible material are connected to each other in the vicinity of the tank. A tank with sex. In a tank provided on the ground for storing gas or liquid, a unit member assembly in which unit members made of resin or metal and made of a flexible material are connected to each other in the vicinity of the tank is disposed. To give seismic isolation.

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