JP2909350B2 - Lining storage tank construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lining storage tank for storing a liquid or a powder, and more particularly to a method for constructing a lining storage tank having a lining up to a ceiling.

[0002]

2. Description of the Related Art A lining storage tank is formed by lining a liner plate such as a metal plate or the like in a liquid seal on a concrete body, and is mainly used for storing liquids, powders, and the like. When storing a liquid such as water, stainless steel is usually used as the liner plate.

[0003] In a nuclear facility, this lining storage tank is installed to store radioactive liquid waste generated from the facility and to attenuate the radioactivity of the waste, and the waste liquid is classified through various lining storage tanks. Installed to purify and reuse as circulating water in nuclear facilities.

There are various types of lining storage tanks,
2. Description of the Related Art In a nuclear facility radioactive waste treatment system or the like, a rectangular container capable of storing a relatively large volume of waste liquid is used in view of a space factor of a nuclear facility building.

As shown in FIGS. 6 and 7, a structure of a lining storage tank of this type, which has been generally adopted, is formed by applying a liner plate to all wall surfaces of pits formed in a closed state. I have.

That is, this kind of lining storage tank is mainly lined with a liner plate 1 made of stainless steel, which is lined with a pit formed by a concrete body.
A base metal 2 serving as a backing metal for welding of the anchor and liner plate; and a stud 3 installed on the base metal 2 to integrate the concrete and the lining storage tank.
And a pipe 4 installed in the lining storage tank.

[0007] The construction method of the lining storage tank formed as described above, particularly the lining construction method, will be described. The liner plate 1 is also installed on the side wall, floor (bottom wall), and ceiling wall of the concrete pit. However, the side wall liner plate 21 and the floor liner plate 32 are attached by welding to the base metalwork 2 previously installed at the time of placing concrete.

[0008] The liner plate 20 on the ceiling wall is attached to the metal base 2 from the tank by welding after the concrete is cast on the ceiling.

[0009] This construction method is called a lining post-stretching construction method and is extremely generally employed.

[0010] As another construction method, as described in, for example, Japanese Utility Model Application Laid-Open No. 56-135493, a panel in which a liner plate and a base metal on all wall surfaces are integrated when concrete is poured is installed. In addition, there is a construction method in which concrete is poured around this to eliminate the need for welding liner plates.

[0011]

Among these methods, in the former construction method, when the ceiling liner plate 20 and the base metalwork 2 are welded, the work is directed upward, and further, a scaffold is assembled and the height on the scaffold is raised. Since the work was carried out in some places, problems were apt to occur in the quality of the welded portion, and the welding workability was poor.

On the other hand, in the case of the latter construction method, since the welding operation system can be freely selected, the welding quality of the liner plate is ensured, but the workability of the pipe installation in the tank to be performed thereafter is poor. Concrete is poured after the liner plate is installed, but there is a dislike that considerable reinforcement of the panel is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and it is an object of the present invention to improve the workability of welding and the work of installing pipes in a tank, and to reduce the reinforcement at the time of placing concrete. It is an object of the present invention to provide a method for constructing a lining storage tank of this kind.

[0014]

Means for Solving the Problems] The present invention is con
The bottom wall in the closed pit formed by the cleat frame,
Liner plates lined on side and ceiling walls, respectively
Lining storage tank construction method
Raise and lower the side wall liner plate provided on the closed pit side wall.
And the divided upper sidewall liner plate
And above the liner plate on the ceiling wall and inside the storage tank
The internal structure installed in the area is fixed outside the pit in advance.
The integrated liner press
With the divided lower side wall liner plate
After installation, it is carried in at a predetermined position in the pit,
After installing the integrated liner plate,
No initial eyes like casting concrete on top of
The goal is to achieve. In addition, the present invention
Bottom in closed pit formed by concrete skeleton
Liner plates inside the wall, side wall and ceiling wall
In the construction method of the lining storage tank
The side wall liner plate provided on the side wall of the closed pit
The upper side wall liner is divided into upper and lower
Rate and liner plate on the ceiling wall and inside the storage tank
The internal structures installed above the
Into a panel block to secure the panel block.
With the divided lower side wall liner plate
After that, carry in and install it on top of this panel block
After installing the concrete, pour the concrete at the top of the pit and
After placing concrete, liner play on the bottom wall
Liner plate and panel block
And are integrated by welding. This place
The bottom wall liner plate and the side wall liner plate.
When the rate and the molded body are integrated by welding,
Welding at the boundary between the feature and the liner plate on the side wall
It is intended to be constructed later .

[0015]

[Function] That is, the method of constructing such a lining storage tank
Is divided into a top and bottom liner plate.
The upper side wall liner plate and the inside of the storage tank
Internal structure installed in the section is fixed outside the pit in advance
Integrated, and this integrated ceiling liner
After the plate was installed, concrete was placed above the pit.
Workability outside the pit, for example, in factories
Good condition, ie working at height on a scaffold or
It is possible to perform welding without any contact work.
In addition, the ceiling liner plate is
Integrated with the side wall liner plate on the upper side of the box, ie the box
It is formed in the shape of
Since the internal structure to be placed is fixed,
Flexural rigidity is increased, and this ceiling liner plate
Almost all reinforcements are required when installing
And can withstand the pressure of concrete in the ceiling
It is possible for this to be possible for vertical support in the storage tank (building
Materials, etc. are no longer required, reducing on-site man-hours.
And the construction period can be shortened. Also, in the local
Welding work from outside the lining storage ceiling
The on-site welding work is performed only from the inside of the storage tank.
Inspection of parts can be easily performed from inside the storage tank,
Construction time can be shortened without worrying about the quality of
You .

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 shows a cross section of a lining storage tank provided with a liner plate 1 and required piping 4 in a concrete pit 31.

In constructing this lining storage tank,
As shown in FIG. 3, the side wall liner plate 21 is preliminarily attached to the side wall upper liner plate 21A.
And a side wall lower liner plate 21B, and a ceiling liner plate 20, which becomes a ceiling in a factory, and a liner plate 21A, which is an upper part of the side wall,
The liner plate is integrated by welding via a base metal member 22 serving as a backing metal of the liner plate to produce a box-shaped body.

On the ceiling liner plate 20 and the side wall upper liner plate 21A formed in a box-like body, a through-sleeve 6 for mounting the pipe 4 inside the tank, the tank internal structure 5, and a metal fitting 7 are further factory-installed. To produce a panel block (molded body) 30 by welding.

The in-tank pipe 4 is fixed by a pipe support 8 attached to an embedded metal member 7 through a through sleeve 6, and the internal structure 5 is similarly fixed to the embedded metal member 7.
And is fixed by a pipe support 8 attached to the pipe.

The panel block 30 manufactured in the factory as described above is carried to the site.

At the site where the lining storage tank is installed, before the panel block 30 is installed, the base metal 2 serving as a welding backing for the side wall lower liner plate 21B and the bottom liner plate 32 is set in advance, and the veneer form 9 Is attached to the metal base 2, and concrete on the wall is cast to form a storage tank side wall.

After the storage tank side wall is formed, the panel block 30 is carried into the installation place by the crane 25. In order to prevent deformation when the panel block 30 is carried in, the panel block 30 is suspended via a rectangular suspension balance 24 composed of beams.

The panel block 30 is provided with a base metal 26 previously embedded in concrete on the side wall of the lining tank.
Is placed on the lower surface of the panel block 30 and set. The fixing of the panel block 30 is performed by welding the base metal member 26 and the base metal member 23.

The panel block 30 set at the storage tank installation location is integrated at the factory as described above, and the storage tank internal piping 4 and the storage tank internal structure 5 are attached thereto. Since the reinforcement against the pressure is taken, it can be used as a substitute for the formwork at the time of placing the concrete. After the panel block 30 is set, the concrete is placed on the ceiling.

After the concrete is cast, the inner wall of the tank and the bottom liner plate are water-sealed and welded. Lastly, the liner plate 27 at the boundary between the panel block 30 and the base metal member 23 on the upper side wall is welded.

Thereafter, the connecting end of the pipe 4 and the storage tank internal structure 5 attached to the panel block 30 is connected to another pipe or the like. This completes the lining storage tank.

According to such a lining storage tank construction method, the following effects occur. That is, since the panel block was formed, and then the ceiling concrete was cast, the ceiling formwork required by the conventional construction method,
Internal reinforcement that can withstand concrete casting pressure is not required, and construction materials can be significantly reduced.

In addition, a scaffold for constructing a liner plate on the ceiling is not required, and the storage tank side wall and the liner plate on the ceiling can be welded in a good posture at the factory.
It is easy to ensure quality.

Furthermore, since the internal structures such as pipes are integrated with the panel block in the factory in advance, it is not necessary to install them on-site at a high place. Also, by installing supports and pipes for internal structures when integrally manufacturing in the factory, it is possible to reduce the reinforcement because it can also serve as a support for internal structures and deformation prevention due to concrete casting pressure at the site of installation. Become.

Further, since the number of on-site work steps can be reduced, the construction period can be shortened.

FIGS. 4 and 5 show another embodiment of the present invention. That is, the aforementioned panel block 30
As a method of attaching the in-tank pipe 4 to the storage tank, an embedded metal member 43 is provided on the liner plate 21A above the storage tank side wall, and a support 40 made of a steel material such as an H-shaped steel is provided on the embedded metal member 43 in a grid pattern.

Further, a support 41 is provided on the girder-shaped support 40, and the in-tank pipe 4 is fixed thereto. In addition, a support 42 for suppressing deformation of the ceiling liner plate 20 at the time of placing concrete is provided above the support 40.

With this configuration, the same effects as those of the above-described embodiment can be obtained, and the piping 4 in the tank can be used.
This can be used both as a support for concrete placement and a support for placing concrete, thereby reducing the amount of steel.

[0034]

As described above, according to the construction method of the present invention, the liner plate at the ceiling can be welded with good workability, and good quality can be obtained. Since the internal structures such as pipes installed on the upper part of the lining storage tank and the support for the internal structures are pre-mounted on the panel block, there is no need to perform the installation work at a high place on site, so In addition, it is possible to improve the welding workability and the pipe installation workability in the tank, and it is possible to reduce the reinforcement at the time of placing concrete.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a lining storage tank formed by a construction method of the present invention.

FIG. 2 is an enlarged sectional view of a portion B in FIG.

FIG. 3 is an on-site installation state diagram of the lining storage tank construction method of the present invention.

FIG. 4 is a partially broken plan view of a lining storage tank showing another embodiment of the present invention.

FIG. 5 is a vertical sectional side view of a lining storage tank showing another embodiment of the present invention.

FIG. 6 is a vertical sectional side view of a lining storage tank formed by a conventional construction method.

FIG. 7 is an enlarged sectional view of a portion A in FIG. 6;

[Explanation of symbols]

1 ... liner plate, 2 ... base metal, 3 ... stud,
4 ... Piping, 5 ... Internal structure, 6 ... Penetration sleeve, 7 ... Embedded metal, 8 ... Piping support 20 ... Ceiling wall liner plate, 21 ... Side wall liner plate, 21A ... Side wall upper liner plate, 21A ...
Side wall lower liner plate, 22: base metal, 23: base metal, 24: hanging balance, 25: crane, 26: base metal, 27: liner plate, 30: panel block,
40 ... support, 41 ... support, 42 ... support, 4
3. Embedded hardware.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65D 90/04

Claims (6)

(57) [Claims] 1. A method for constructing a lining storage tank in which a liner plate is lined on a bottom wall, a side wall and a ceiling wall in a closed pit formed by a concrete body, respectively, wherein the side wall liner plate is provided on the closed pit side wall.
And the upper side wall liner
Plate and liner plate on the ceiling wall and inside the storage tank
The internal structure installed above the part in advance outside the pit.
And the integrated liner plate is divided into
After attaching the lower side wall liner plate
Tsu carried was set at a predetermined position in the preparative, after installation of the integrated with and La Inner plate construction method of lining a storage tank, characterized in that the concrete pit top so that pouring. 2. A method for constructing a lining storage tank in which a liner plate is lined on a bottom wall, a side wall, and a ceiling wall in a closed pit formed by a concrete body, respectively, wherein the side wall liner plate is provided on the closed pit side wall.
And the upper side wall liner
Plate and liner plate on the ceiling wall and inside the storage tank
The internal structure installed above the part in advance outside the pit.
Into a panel block, and attach the panel block to the divided lower side wall liner.
After installing the plate, carry it in above it and install it.After installing this panel block,
And after the concrete has been cast, the bottom
Wall liner plate and side wall liner plate and
A method for constructing a lining storage tank, wherein the panel block and the panel block are integrated by welding . 3. A hermetic seal formed by a concrete body.
Liners are installed on the bottom, side and ceiling walls of the pit, respectively.
-How to install a lining storage tank with a plate lining
In the method, the side provided in advance on the side wall of the closed pit outside the pit
Split the wall liner plate up and down, and split this
Upper side wall liner plate and the ceiling wall liner plate
Internal structure installed at the upper part inside the rate and storage tank
And fixing it to form a box-shaped molded body. The ceiling is open
The process of placing concrete in the released pit. The pi
Liner plates are attached to the bottom and side walls of the unit
Process. Liner plate attached to the pit
Installing the molded body on the upper part of the body. Installation of the molded body
After placing, the process of placing concrete above the pit. Said
After placing concrete at the top of the pit,
Gnar plate and side wall liner plate and molding
The process of welding and integrating the body. A method for constructing a lining storage tank, comprising: 4. The bottom wall liner plate and side wall plate.
When welding and integrating the liner plate and the molded body
And the boundary between the molded body and the liner plate on the side wall.
Welding, construction method of the last construction is composed claim 3 wherein the La delegated <br/> grayed reservoir. 5. A method for constructing a lining storage tank in which a liner plate is lined on a bottom wall, a side wall and a ceiling wall in a closed pit formed by a concrete body, respectively, wherein the side wall liner plate is provided on the closed pit side wall.
And the upper side wall liner
Plate and liner plate and storage tank part of the ceiling wall
Metal fittings, studs and storage tanks installed above
The piping and supports installed in the section are integrated into a single module
In the meantime, this integrated module is connected to the divided lower side wall line.
After installing the integrated plate, it is loaded and installed above it, and after installing this integrated module, the concrete
And after the concrete has been cast, the bottom
Wall liner plate and side wall liner plate and
A method for constructing a lining storage tank, wherein the panel block and the panel block are integrated by welding . 6. An internal structure in a storage tank in the module.
Reinforcement that combines object support and module deformation prevention
Construction method provided comprising according to claim 5, wherein the La innings reservoir.