JP2769801B2 - Installation method of FRP double shell tank for underground liquid hazardous materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing an FRP double shell tank for underground buried liquid dangerous substances such as gasoline and light oil, which is installed buried under a gas station. Related to installation equipment.

[0002]

2. Description of the Related Art Currently, as a double-shell tank for underground buried liquid hazardous materials, an SS double-shell tank in which an inner shell and an outer shell are formed of steel plates, and an inner shell formed of steel plates and an outer shell formed of FRP. Is used. However, conventional double-shell tanks for underground buried liquid hazardous materials, at least the inner shell is made of steel plate, so even if the steel plate is externally coated, corrosion of the steel plate cannot be completely prevented, Therefore, there is a problem that a leakage accident due to corrosion of the steel sheet occurs. Therefore, recently, both the inner and outer shells have F
An FRP double shell tank made of RP has been proposed.
The FRP double-shell tank is a double-shell tank whose inner and outer shells are made of FRP (reinforced plastic), which stores liquid hazardous materials underground and consists of a body plate and a head plate that are in direct contact with the internal liquid. Refers to a horizontal cylindrical tank consisting of a shell and an outer shell that covers the inner shell. This FRP double-shell tank is used to detect leakage of liquid hazardous material between the inner shell and the outer shell. Is provided. Further, the tank is provided with auxiliary devices such as an oil supply port, a vent port, an inspection port, a joint for a leak detection device, and a pipe for filling or taking out a liquid. When installing this FRP double-shell tank in the basement of a gas station, etc., a tank pillow should be provided on a concrete foundation in advance, and this tank should be placed on it and then fixed with a fixing band. become.
Also, in Japanese Patent Application No. 7-31668, the present applicant previously installed a floor anchor on a concrete foundation, placed an FRP double shell tank connected to a tank pillow from above, and filled the tank pillow with concrete. A method of installing an FRP double shell tank by filling concrete from the opening was proposed.

[0003]

However, this conventional installation method requires a plurality of operations such as concrete foundation work, tank pillow work, and tank fixing work. There is a problem that shortening cannot be achieved. Further, in the conventional method, since the tank has a cylindrical shape, there is also a problem that handling during transportation or temporary placement is difficult. And, Japanese Patent Application No. 7-3166
In the method of No. 8, it is time-consuming because it is a method of pouring concrete into the tank pillow, and it is not possible to check whether the bottom of the tank pillow is sufficiently filled with concrete. If the concrete is not sufficiently filled, In some cases, the tank may shift sideways, float, sink, and the like. When the tank is buried, the concrete foundation and the tank pillow must have sufficient strength when filling the tank with water to prevent deformation due to the water filling test and earth pressure. After the foundation and tank pillow had set, it was necessary to perform a water filling test and backfill, and had to wait until the concrete in the tank pillow had set, which was time-consuming. The present invention has been made in order to solve the above-mentioned problems in the related art, and an object of the present invention is to facilitate transporting and temporary placing work, and to shorten the construction period and simplify the construction. It is an object of the present invention to provide a method of installing an FRP double-shell tank capable of performing the above-mentioned steps.

[0004]

As means for achieving the above object, a single or a plurality of loads at the time of maximum loading are previously applied to the lower part of the FRP double shell tank.
A tank pillow for holding the P double-shell tank in a self-supporting manner is fixed, and when the FRP double-shell tank is installed on a concrete foundation, the tank pillow is fixed on the concrete foundation. A method was adopted in which the tank band wound around the outer periphery of the above was fixed on a concrete foundation, and the FRP double shell tank was installed on the concrete foundation.

[0005]

According to the method of installing the FRP double shell tank for underground buried liquid hazardous materials of the present invention, the tank pillow is attached to the FRP double shell tank before installation, so that the temporary storage work and transportation can be easily performed. it can. In the present invention, F
A tank pillow is fixed to the lower part of the RP double-shell tank, and the tank pillow is fixed together with the tank band on the concrete foundation to install the FRP double-shell tank, thereby simplifying the installation work. can do. Further, in the present invention, since the tank pillow holds the maximum load of the FRP double-shell tank, the tank can be filled with water at the same time as the installation of the FRP double-shell tank to perform a water filling test. Filling can also prevent deformation of the tank due to earth pressure at the time of backfilling, so that the tank can be backfilled immediately and the construction period can be shortened. Further, in the present invention, since the tank is fixed on the concrete foundation by the tank band and the tank pillow, the floating, sinking, or lateral movement of the FRP double shell tank can be reliably prevented. Further, in the present invention, the tank and the tank pillow can be manufactured at the factory, and the joining work can be performed at the factory. Workability is improved.

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing a tank pillow according to a first embodiment of the present invention, FIG. 2 is an explanatory view showing an installation method of an FRP double shell tank, FIG. 3 is a sectional view showing an installation state of an FRP double shell tank, FIG. 4 is a perspective view showing a tank pillow according to a second embodiment of the present invention, FIG. 5 is a perspective view showing a tank pillow according to a third embodiment of the present invention, and FIG. FIG. As shown in FIG. 1, the installation equipment for the double shell tank for liquid hazardous materials of the first embodiment is a tank pillow 1 formed of FRP and an L-shaped mounting bracket formed on the outer frame 2 of the tank pillow. 3 is comprised.

The tank pillow 1 is for placing an FRP double-shell tank on the upper side, and is formed by curving the upper part of a rectangular box along the outer peripheral side surface of the tank. A tank mounting portion 5 is formed by an outer frame 2 of the object and a reinforcing rib 4 formed by erecting a plate having a predetermined width inside the outer frame 2. Then, the reinforcing rib 4 is attached to the tank mounting portion 5.
Is formed, the tank pillow 1 has a strength to hold the load when the tank is fully loaded. In addition, the bottom surface of the tank pillow 1 is closed, and the upper side is opened. The tank pillow 1 is integrally fixed to the tank at the time of tank manufacture, or after the tank is manufactured, is fixed to at least two places before and after the FRP double shell tank with an adhesive, a bolt, a tank band, or the like.

The L-shaped fitting 3 is a fitting made of a steel material (stainless angle material or the like) bent at the center into an L shape, and has a bolt hole 6 on each bent side. The tank pillow 1 is attached to the four corners of the tank in the length direction parallel to each other with bolts 7 to form a tank pillow fixing portion. Note that the L-shaped mounting bracket 3 may be formed by integrally covering the tank pillow 1 with a resin.

Next, the FR of the present invention will be described with reference to FIGS.
The method of installing the P double shell tank will be described. An installation hole slightly larger than the FRP double shell tank 12 is excavated to a predetermined depth, and concrete is poured into the bottom of the installation hole.
Bolt hole 6 of L-shaped mounting bracket 3 attached to tank pillow 1
The concrete foundation 10 is made by burying the anchor bolts 11 to be inserted into the base. After the concrete foundation 10 has hardened,
Lift the FRP double shell tank 12 by crane,
The bolt hole 6 of the L-shaped mounting bracket 3 of the tank pillow 1 fixed to the lower part of the FRP double shell tank 12 is inserted into the anchor bolt 11 protruding from the concrete foundation 10 while being inserted and positioned in the installation hole. And set it on the concrete foundation 10. Then, the tank band 10a is wound around the outer periphery of the FRP double shell tank 12, and is fixed to the anchor bolt 11 together with the L-shaped mounting bracket 3 by the nut 11a, and the FRP double shell tank 12 and the tank pillow 1 are fixed by the tank band 10a. Integrated with FRP double shell tank 12
Is firmly fixed on the concrete foundation 10.

FRP for underground buried liquid hazardous material of this embodiment
In the double-shell tank installation device and the installation method using the same, the tank can be fixed to the tank pillow 1 in advance, and can be transported to the installation location in a stable state, so that the transportation operation is facilitated, and Temporary placement work on the foundation is also facilitated and workability is improved. In the apparatus and method according to the present embodiment, the anchor bolts 11 are installed on the concrete foundation 10 in advance, and the FRP
Place the tank pillow 1 fixed below the double shell tank 12,
The FRP double shell tank 12 can be installed simply by inserting and fixing the L-shaped mounting bracket 3 formed on the tank pillow 1, the tank band 10a, and the anchor bolt 11 formed on the concrete foundation 10. The installation work can be simplified. Further, in the apparatus and method of the present embodiment, since the tank pillow 1 holds the load at the time of the maximum loading of the FRP double shell tank 12, there is no need to pour concrete, and the water filling test is performed immediately after the tank pillow 1 is installed. Inspection can be performed and backfilling can be performed immediately after the inspection is completed, so that the entire construction period can be shortened. In this embodiment, since the tank is fixed together with the tank pillow 1 and the tank band 10a on the concrete foundation 10 by the anchor bolt 11, the floating, sinking, or lateral movement of the FRP double shell tank 12 is reliably prevented. be able to.
In the apparatus and method of the present embodiment, the tank pillow 1 is made of FR.
Since it is formed of P, even if the FRP double shell tank 12 is placed, it can be used for a long time while maintaining sufficient strength.
Further, since the tank pillow 1 has the tank mounting portion 5 formed by the outer frame 2 and the plurality of reinforcing ribs 4, the strength of the tank pillow 1 can be sufficiently ensured. In addition, in the apparatus and method of the present embodiment, since the joining operation of the tank and the tank pillow 1 can be performed at the factory, if the concrete foundation 10 is accurately constructed, the level adjustment becomes easy, and the workability is improved. improves.

Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like may be made without departing from the gist of the present invention. This is also included in the present invention. For example, in the embodiment, two tank pillows are used, but the number is not limited. Further, in the embodiment, the plurality of reinforcing ribs 4 inside the outer frame 2 are formed in parallel to the length direction of the tank. However, as shown in FIG. 4, a plurality of reinforcing ribs 15 are formed at right angles to the length direction of the tank. The reinforcing ribs 16 may be formed in a lattice shape by intersecting the reinforcing ribs 16 as shown in FIG. Also,
A metal plate, a veneer plate or the like can be used as a core material of the outer frame or the reinforcing rib.

In the embodiment, the L-shaped mounting bracket is used as the tank pillow fixing portion. However, as shown in FIG. 6, the tank pillow fixing portion 17 may be formed integrally with the tank pillow 1 and protruded like a flange. Good. Alternatively, the FRP double shell tank may be installed by forming a bolt hole on the lower surface of the tank pillow and inserting and fixing an anchor bolt on a concrete foundation into the bolt hole. Further, a hole 19 for inserting a tank band is formed on the side surface of the tank pillow, and the tank band 20 is inserted into the hole 19 for inserting the tank band.
And the tank pillow 1 can be fastened and fixed by the tank band 20. Since the FRP double shell tank is integrated with the tank pillow by the tank band 20, and the tank pillow is fixed to the concrete foundation, the floating, sinking, or lateral movement of the FRP double shell tank can be reliably prevented. Further, although the bottom surface is formed on the tank pillow in the embodiment, the present invention includes a case where the bottom surface of the tank pillow is not formed due to the condition of the concrete foundation or the like.

[0013]

As described above, according to the present invention ,
In the method for installing an FRP double-shell tank for underground buried liquid hazardous materials described in 1 above , the tank pillow is attached to the FRP double-shell tank before installation, so that temporary storage work and transportation can be easily performed. Further, in the present invention, a tank pillow is fixed below the FRP double shell tank in advance, and the tank pillow is fixed together with the tank band on a concrete foundation, thereby installing the FRP double shell tank. Therefore, the installation work can be simplified. Further, in the present invention, since the tank pillow holds the maximum load of the FRP double shell tank, the water filling test can be performed immediately after the tank is installed, and the backfill can be performed immediately after the completion of the water filling test. Therefore, the construction period can be shortened. Also,
In the present invention, since the tank is fixed on the concrete foundation by the tank band and the tank pillow, it is possible to reliably prevent the floating, sinking, or lateral movement of the FRP double-shell tank. Further, in the present invention, the tank and the tank pillow can be manufactured at the factory, and the joining operation can be performed at the factory, so that the tank and the tank pillow can be stably transported, and the concrete foundation can be accurately constructed. If this is the case, level adjustment is easy and workability is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a tank pillow according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a method for installing an FRP double shell tank.

FIG. 3 is a sectional view showing an installation state of an FRP double shell tank.

FIG. 4 is a perspective view showing a tank pillow according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing a tank pillow according to a third embodiment of the present invention.

FIG. 6 is a perspective view showing a tank pillow according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank pillow 2 Outer frame 3 L-shaped mounting bracket 4 Reinforcement rib 5 Tank mounting part 6 Bolt hole 7 Bolt 10 Concrete foundation 10a Tank band 11a Nut 11 Anchor bolt 12 FRP double shell tank 15 Reinforcement rib 16 Reinforcement rib

Claims (1)

(57) [Claims] 1. A load at the time of maximum loading is received in advance in the lower portion of the FRP double shell tank by a single load or a plurality of loads.
A tank pillow for holding the P double-shell tank in a self-supporting manner is fixed, and when the FRP double-shell tank is installed on a concrete foundation, the tank pillow is fixed on the concrete foundation. A method of installing an FRP double shell tank for underground buried liquid hazardous material, in which a tank band wound around an outer periphery of the above is fixed on a concrete foundation, and an FRP double shell tank is installed on the concrete foundation.