JPH11131858A - Method of constructing tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the quality management by carrying a side plate piece assembled in a factory to a constructing site to set it, and constructing a side wall by use of the side plate piece. SOLUTION: A side plate 7 is bent according to the curvature radius of a side wall 3 in a factory, and three side plates 7 are arranged in protruding state and welded to constitute a side plate piece 6. Side plate pieces 6A, 6B and a side plate 7A are arranged in a prescribed position for constructing a side wall 3, and mutually connected by field welding to annularly construct the bottom part of the side wall 3. Then, a side plate 7B is arranged on the side plate 7A, and the side plate pieces 6A, 6B and the side plate 7A are field- welded to the side plate 7B to construct the lower half of the side wall 3. A side plate piece 6C is arranged in a position shifted to the right by the length L1 for one side plate 7 on the upper part of the side plate pieces 6A, 6B, and a side plate pieces 6D and side plates 7C, 7D are arranged on the right side and welded, respectively, to construct the side wall 3. Thus, the field welding work can be reduced, and the quality management can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a tank suitable for constructing a liquid tank for petroleum or the like.

[0002]

2. Description of the Related Art Heretofore, when constructing a side wall of a tank of this type, a method has been used in which side plates formed by bending a rectangular steel plate are assembled one by one by field welding.

[0003]

However, in this case, it is necessary to weld each side plate on site, and the quality of the welded portion tends to vary greatly due to the influence of wind or the like, and quality control is difficult. Not only that, because it is field welding,
There were many problems that were easily affected by the weather and difficult in process management.

[0004] In view of the above circumstances, the present invention relates to a method for constructing a tank capable of reducing welding work at a construction site and facilitating quality control and process control.

[0005]

That is, according to the present invention, when a tank (1) including a side wall (3) and a top plate (5) formed on the side wall is constructed, the side wall of the tank is constructed.
A plurality of side plates (6) formed in a rectangular shape at a predetermined curvature are assembled by welding at a factory, side plate pieces (6) are prepared in advance, and the side plate pieces (6) assembled at the factory are placed in a tank. It is configured to be transported and installed at the construction site, and to construct the side wall at the construction site using the side plate pieces (6). Note that the numbers and the like in parentheses are for convenience showing the corresponding elements in the drawings, and therefore, this description is not limited to the description on the drawings.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of a tank to which the present invention is applied, FIG. 2 is a view showing an example of a side plate piece, FIG.
FIG. 2 is a development view of a side wall of the tank in FIG. 1.

As shown in FIG. 1, the tank 1 to which the present invention is applied has a main body 4 formed entirely in a cylindrical shape, and the main body 4 has a side wall 3 erected on the ground 2. Have. The side wall 3 is entirely formed in a cylindrical shape, and a storage space 3a for liquid such as petroleum is formed inside the side wall 3.
The upper part of the storage space 3a is closed by a top plate 5, and the top plate 5 is provided so that its periphery is supported by the side wall 3. The side wall 3 is formed from four side plate pieces 6 formed in a convex shape and four side plates 7 formed in a rectangular shape, which are bent in accordance with the curvature of the side wall 3. As shown in FIG. 2, three side plates 7 bent in accordance with the curvature of the side wall 3 are formed by factory welding.

[0008] Since the tank 1 to which the present invention is applied has the above-described configuration, when constructing the tank 1, first, the side plate 7 formed in a rectangular shape in a factory separated from the construction site of the tank 1. Is bent in accordance with the curvature of the side wall 3 of the tank 1 to be constructed. Next, as shown in FIG. 2, the three side plates 7 are arranged in a convex shape and welded to each other.
To produce Since this welding operation is performed in a factory that is indoors, quality control of welding can be easily performed.

In this way, four side plates 7 and side plate pieces 6 are prepared in advance in the factory, and the prepared side plates 7 and side plate pieces 6 are transported to the construction site of the tank 1 by a truck or the like. At the construction site, first, as shown in FIG. 3, the building is first constructed from a lower portion constituting the side wall 3 on a foundation (not shown) appropriately constructed on the ground 2. As shown in FIG. 3, a side plate piece 6A (a part number 7 is followed by an alphabet ABCD to distinguish each plate of the side plate piece 6; the same applies to the side plate 7) is used for forming the side plate 3 at a predetermined position. , The side plate piece 6B is similarly disposed on the right side of the placed side plate piece 6A in the drawing, and the side plate pieces 6A and 6B are joined by field welding. Next, the side plate 7A is disposed and installed on the right side of the side plate piece 6B in the drawing, so that the right end of the side plate piece 6B in the drawing is connected to the left end of the side plate piece 6A in the drawing. The lowermost part is constructed in an annular shape. Next, on the upper part of the welded side plate 7A in the drawing,
Similarly, the side plate 7B is arranged and installed so as to connect the right end of the side plate piece 6B in the drawing and the left end of the side plate piece 6A in the drawing, and in that state, the side plate pieces 6A and 6B, and the side plate 7A and the side plate 7B are welded in place. Then, the lower half of the side wall 3 is constructed.

Next, as shown in FIG. 3, the length L1 of one side plate 7 is placed on the installed side plate pieces 6A and 6B.
A new side plate 6C is arranged and installed only at a position shifted to the right in the drawing, and the side plate pieces 6A, 6B and the side plate piece 6C are joined by field welding. When the side plate piece 6C is installed,
Similarly, the side plate piece 6D is disposed and installed on the right side of the side plate piece 6C in the drawing, and the side plate pieces 6B and 6C, and the side plate 7B and the side plate piece 6D are similarly joined by field welding. Next, a side plate 7C is placed above the right side plate 7B of the side plate piece 6D in the drawing.
The right end of the side plate piece 6D in the figure and the left end of the side plate piece 6C in the figure are connected and installed, and in that state, field welding is performed.
Next, the side plate 7D is similarly arranged and installed on the upper side of the welded side plate 7C in the figure so as to connect the right end of the side plate piece 6D in the figure and the left end of the side plate piece 6C in the figure. 6D, field welding is performed between the side plate 7C and the side plate 7D, and the construction of the side wall 3 is completed.

When the construction of the side wall 3 is completed, the top plate 7
On the side wall 3 to complete the construction of the tank 1. In addition, as long as the side plate piece 6 is formed by joining a plurality of side plates 7 by factory welding, the shape thereof is not limited to the convex shape shown in FIG.

[0012]

As described above, according to the present invention,
In the tank 1 composed of the side wall 3 and the top plate 5 formed on the side wall, when constructing the side wall of the tank, a plurality of side plates 7 formed in a rectangular shape with a predetermined curvature are joined by factory welding. The side plate pieces 6 assembled in advance are prepared in advance, and the side plate pieces 6 assembled in the factories are transported to the construction site of the tank and installed, and the side walls are constructed on the construction site using the side plate pieces 6. So that
On-site welding at the construction site can be reduced by the amount of factory welding, and it is possible to eliminate as much as possible that the construction is affected by weather such as wind and rain, and to facilitate quality control and process control. I can do it.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a tank to which the present invention is applied;

FIG. 2 is a view showing an example of a side plate piece;

FIG. 3 is a developed view of a side wall of the tank of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tank 3 ... Side wall 5 ... Top plate 6 ... Side plate piece 7 ... Side plate

Claims (1)

[Claims] In a tank comprising a side wall and a top plate formed on the side wall, a plurality of rectangular side plates having a predetermined curvature are joined by factory welding when constructing the side wall of the tank. Prepare the side plate pieces assembled in advance, transport the side plate pieces assembled in those factories to the construction site of the tank, install them, and construct the side wall at the construction site using the side plate pieces Tank construction method.