JPS60192058A - Wedge-up construction method of storage tank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a repair method for cylindrical storage tanks such as oil tanks.
More specifically, it is used for repair work on the bottom plate and/or lower side wall of a flat-bottomed vertical cylindrical storage tank.

Prior Art The conventional construction method for repairing the bottom and/or the lower part of the side wall of a storage tank as described above is as shown in FIG. The pedestal 3 is fixed by welding, and the pedestal is pushed up from the lower end of the pedestal 2 using a hydraulic jack 4 to push up the entire storage tank at the same time.
J: Weld the L-shaped piece 6 all around the inside of the sea urchin side wall,
The repair work has been carried out by cutting and removing the lower part 7 of the 1-type piece of the side wall to a certain height so that the entire side wall is supported by the L-shaped piece, and creating a space between the side wall and the bottom plate. . In these construction methods, the lower end of the side wall is separated by the bottom plate and supported by a support member fixed to the side wall by welding. This will occur, so prevent this by +1
-41' It is recommended to weld a reinforcing ring 5 as shown in Fig. 1 around the entire lower part of the side wall.
rr < has been done. These auxiliary members for repair work are removed after the repair work is completed, but since the removed side wall is a product that will be used again as a storage tank, many auxiliary 4A removal methods are required, as in these conventional methods. f4L:Holding the welding part considerably for J requires a grinder to remove traces after removing the auxiliary material. This is required for safety reasons for the storage tank.

Even under the side wall! Lit; carry out construction work to remove the part/:l
The jh2 case has many drawbacks, such as the side wall of the storage tank (J) after repair 1p (J, 3η after repair).

Purpose of the Invention The construction method of this defense overcomes the drawbacks of the conventional construction methods described above. II
By welding a support IJ to the lower end of the side wall and supporting the upper side wall, etc., there is a drawback that a unilateral horizontal force is applied to the bottom of the side wall, and there are many auxiliary materials welded and removed. : Damage to the side walls, etc.! The present invention provides a new method for repairing the side walls and bottom of a flat-bottomed vertical cylindrical storage tank, which does not have drawbacks such as stiffness or the need for inspection of the removed portion.

Structure of the Invention The present invention is characterized by the use of a new tool for lifting and supporting the upper structure such as the side wall of a storage tank. Fourth
Figure 5 and Figure 5 are explanatory diagrams of the state in which the above-mentioned jig is placed on the lower end of the side wall.
Gradually thicker wedge pieces A, B, C, 0, and F are sandwiched under the side plate, and -LRI [This is a dimensional drawing showing one state of the situation. At the lower end of the side wall 1 there is a side wall support v
J8 is inserted as shown in the picture. The side wall support 8 has an L-shaped side surface and has the same slope as the upper surface of the wedge piece 9 which is inserted in contact with the lower surface of the support 8 to facilitate the insertion of the T-shaped wedge piece 9. protects the bottom surface of the A flat plate 10 is provided between the wedge piece 9 and the bottom plate 2 and serves to protect the bottom plate 2.
In order to prevent horizontal movement due to the movement of the wedge piece 9, the movement of the wedge piece 9 is restrained by a stopper 11 fixed to the portion 412. The lower surface of the wedge piece 9 is flat, the L has a small inclination angle with respect to the lower surface as shown in the figure, and the tip (the thinner side of the plate J9) has a plurality of holes. 1 member 12 includes a horizontal plate 12a and the horizontal plate 12a.
The vertical plate 12c has holes through which the towing poles 1 to 13 can freely pass, The lower end of the vertical plate 12c is supported by a C pedestal 14. A forked part 15 consisting of one vertical plate and two horizontal plates is fixed to the tip of the traction bolt 13, and the hole in the wedge piece 9 is fixed to the two water 5H7 plates of the part 1,115. The same number of holes with the same diameter as
6 is inserted, and the T-fuji piece 9 is connected to the fork 15. The attachment of the side wall support 448, wedge piece 9, flat plate 10, member 12, traction bolt 13, etc. to the side wall portion is performed as shown in FIGS. 4 and 5.

The method of handling this jig and tool can be understood from the diagram, but after setting each member as shown in Figures 4 and t),
Tighten the neck l-13a of towing poles 1 to 13 (CI' i
In particular, the towing poles 1 to 13 move to the left, and the wedge piece 9b is pulled to the left.

When the wedge piece 9 moves to the left, it moves to the thicker part of the wedge piece 9 under the end face of the side wall 1. This shows that it has grown larger. 'cr J
In this jig, the wedge piece is pulled by the pole (~13) and the nails 1 to 13a, but it is also possible to pull the wedge piece using the side traction device 15', 1, for example, a hydraulic cylinder.

When supporting the side wall of a storage tank with this jig, a vertical load and a horizontal load are applied to the side wall support member 8 and the flat plate 10, but the vertical load is offset by the side wall 1 and the bottom plate 2, and the horizontal load is applied to the side wall. It is transmitted from the supporting member 8 to the member 12, and from the flat plate 10 to the towing pole 1.
-13, the horizontal load transmitted to the member 12 and the nut 13a in the opposite direction is canceled out, so no horizontal load is applied to the side plate 1 and the flat plate 10.

Since a downward vertical force is applied to the part +J12C, it is supported by the support G1 stand 14.

In the wedge-up construction method of the present invention, the entire circumference of the side wall 1 is
However, as shown in Fig. 3, wedge pieces are partially sandwiched between the side wall 1 and the bottom plate 2 within the range of the elasticity of the side wall 1, and the water jig is operated to raise the side wall. It can also be used to advance to a desired height.

Effects of the Invention When the construction method of the present invention is used to raise the side wall of a storage tank, the load support point of the side wall does not move (there is no need to weld the reinforcing ring, and the side wall support does not move). Since the reinforcing material was not welded, the side wall was damaged by welding.
Furthermore, there is no need for grinding or inspection of the welded part removed using the conventional method, and the jig used in the method of the present invention can also be used for repairing other storage tanks. This can be said to be an economical construction method as it can be reused many times.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the conventional jack-up method, Fig. 2 is an explanatory diagram of another conventional method, Fig. 3 is an explanatory diagram of a state in which many jigs are installed around the side wall by the method of the present invention, 4 is an installation side view of the jig used in the construction method of the present invention, and FIG. 5 is an installation plan view of the jig shown in FIG. 4. 1...Side plate 2...Bottom plate 8...Side wall support material 9...Wedge piece 10...Flat plate 13...Tow pole 1~ Agent Asamura Ko? 4 = 3 figures

Claims (4)

[Claims] (1) Wedge pieces of side wall support material are sandwiched in multiple locations under the lower end surface of the side wall of the flat-bottomed vertical cylindrical storage 4t'y to support and cover the side wall, and the thick part of the wedge piece is used to support and cover the side wall. Pull each piece to support the load of the entire side wall. Zuru,
Wedge-up construction method for storage tanks. (2) Particularly i'1 In the storage tank wedge-up construction method as set forth in claim 1, the surface of the side wall supporting material that contacts the wedge piece has the same slope as the slope of the upper surface of the wedge piece. Wedge-up construction method for 14V storage. (3) Part of the storage tank according to claim 1 or 2 of claim 6'F] - In the Tsujiabut construction method, the wedge piece is pulled by bolts and nuts.
Wedge-up construction method for storage tanks. (4) A wedge-up construction method for a storage tank according to claim 1 or 2, characterized in that the wedge piece is pulled by a fluid pressure cylinder.