JPS5916067B2 - How to correct uneven settlement of tank bottom plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for correcting deformation of the tank and foundation due to uneven settlement of the foundation in a large tank such as an oil tank.

In the large tank described above, the tank foundation is deformed due to ground subsidence, resulting in the tank bottom plate tilting to one side.

To correct this, the conventional method of fixing a large number of support columns to the outside surface of the tank and holding and lifting them with jacks is conventional, but this method involves reinforcing the tank outside surface and installing each jack. etc., which require a lot of effort,
The dot was hot. For this reason, attempts have recently been made to cut the tank body into a side plate and a bottom plate and jack them up separately. This has the disadvantage of requiring reinforcement due to the eccentric moment applied to it. On the other hand, the method of the present invention is to drill a hole in the side plate and pass the beam through it and lift it in balance with two jacks. 15 shows a tank to be corrected, and assumes that the ground of the tank bottom plate 1, which corresponds to the shaded area in the figure, has subsided.

(1) First, remove the piping and accessories connected to the tank, and set up a temporary pedestal for the heating coil inside the tank and fix it in a position unrelated to holding. Next, holes 4 through which jack-up beams 3 are to pass are arranged in a row in the tank side plate 2 at approximately the same height. (Fig. 3A) (2) The beam 3 is passed through these holes 4 and its both ends are fixed on the jack receiving plates 5 and 6.
, 8 to support it approximately horizontally.

(Fig. 3B) (3) The bottom plate lifting beams 9 are placed in advance so that they can withstand the weight of the bottom plate over two mutually adjacent jack-up beams 3 inserted in large numbers in this way. A suitable number of bridges are constructed at the intervals calculated in 30, and a hoist 10 is placed on the upper surface of the tank bottom plate 1 directly under the bottom plate hoisting beam 9 to apply the bottom plate lifting load. This suspension 10...
... and the bottom plate lifting beam 9 and the suspension rod 1 with a turnbuckle.
Connect with 1... (Fig. 3C) 35 Fig. 2 is a plan view of this. (4) First, jack T...
and 8... for about 50 minutes, adjust the turnbuckles to smooth out the unevenness of the tank bottom plate, nl, 1, and then jacks 7... and 8...・1
00 wear, 200 wear, 300 wear, 400 wear and so on.

In this case, if the stroke of the jack is insufficient for the lifting height, the height of the jack receiving plates 5, 6 of the jacks 7, 8 can be increased. (5) After raising the tank to a predetermined height (see Fig. 3), filler material 12 such as sand or crushed stone is injected under the bottom plate 1 of the tank (see Fig. 3).

(Fig. 3 E) (6) Raise the jacks 7 by about 20 more millimeters, insert the concrete block 13 around the lower surface of the tank bottom plate 1, and loosen the jacks 7. After lowering the bottom plate onto this concrete block, remove the jacks 7, 8, each beam 8, 9, etc.

(Fig. 3 F) (7) Perform the finishing around the foundation, and close the holes 4 of the side plate 2 with the steel plate made of the same material as the side plate, and the hanging piece 10 of the bottom plate 1...・Remove and fix each piping etc.

As described above, this invention has a number of holes 4... drilled in the tank side plate 2 so that the jack up beam 3.
. . . is inserted, one end of which is supported by a jack 8, and the tank bottom plate 1 is also lifted at the same time via the side plate 2 and the bottom plate lifting beam 9 . As shown in Figure 2, this work involves lifting the entire tank evenly using a large number of jacks, so no strain is placed on the tank. There is no need to provide arm members, etc., and the work can be completed in a short period of time, which is extremely efficient.

[Brief explanation of the drawing]

The drawings are explanatory diagrams showing the order of carrying out the method of the present invention, in which Fig. 1 is a plan view of the tank before modification, Fig. 2 is a plan view during modification, and Figs. FIG. 3 is a side view showing the order. 1 is a tank bottom plate, 2 is a tank side plate, 3 is a beam for jacking up, 4 is a hole, 7 and 8 are jacks, 9 is a beam for lifting the bottom plate, 10 is a hanging piece, 11 is a hanging rod with a turnbuckle,
12 is a filling material.

Claims (1)

[Claims] 1. Holes are placed at approximately the same height on the side plate of the tank to be modified for launch, and jack-up beams are inserted into these holes in a radial manner, with one end positioned above the tank bottom plate and the other end positioned outside the tank. At the same time, both ends of the jack-up beams are supported approximately horizontally via jacks, and the bottom plate lifting beams are bridged between each two adjacent jack-up beams, and the bottom plate lifting beams and the bottom plate lifting beams are Connect the suspension piece fixedly attached to the tank bottom plate with a suspension rod with a turnbuckle, then lift up the jacking beam to pull up the tank side plate and bottom plate, and adjust the turnbuckle of the suspension rod to smooth out the unevenness of the tank bottom plate. A method for correcting uneven settlement of a tank bottom plate, which comprises flattening the tank bottom plate, then packing filler material under the tank bottom plate and sequentially removing the jack.