JPH0123629B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for burying gasoline tanks, oil tanks, and other tanks.

If the soil allows for bare digging to the desired depth for burying the tank, the tank will be installed in the bare dug hole, the necessary piping will be provided, and earth and sand will be poured around the tank to bury the tank. However, various methods have been devised for burying materials in soft ground such as silt or sand that requires mountain retention. For example, a method of excavating by driving sheet piles, or shield piles, has been adopted. However, this shield pile construction method has the disadvantage that it is expensive and therefore increases the cost of burying the tank. Furthermore, in cases where the soil quality is even worse, such as sandy or sludge-like soil with a lot of water, even this shield pile method is not suitable, and other suitable burial methods have been desired.

The present invention has been made in view of the above-mentioned circumstances of the prior art, and its purpose is to provide a tank burying method that is suitable for all types of soil and can be implemented at low cost.

In order to achieve the above object, the method for burying a tank according to the present invention uses a box-shaped frame that can be assembled and disassembled and has a reinforcing frame. That is, the earth and sand from the lower part of the frame installed at the burial site is dug out, the frame is sunk to the required depth, and a foundation for installing the tank is created at the bottom of the frame. Then, the reinforcing frames of the frame are sequentially removed or assembled to prevent the side panels from collapsing, and the tank to be buried is installed on the foundation. The tank is then filled with earth and sand, and the frame components are pulled out to the ground. There are various embodiments of the tank burying method of the present invention, and these embodiments will be described below with reference to the accompanying drawings.

Referring now to FIGS. 1 to 3, it will be understood that the box-shaped frame A used for carrying out the method of the present invention is mainly composed of plates and H-beams. However, it is clear that the box-shaped frame body is not limited to the illustrated example, and any structure can be applied.

The side plates 1, 2, and 3, which are the constituent elements of the box-shaped frame A, consist of a corner side plate 1 and intermediate side plates 2, 3, as best shown in FIG. As shown in FIG. 3, these side plates are constructed by connecting a plurality of plate members 24 to 35 in the vertical direction with connecting members 20, 21, 22, and 23 made of H-shaped steel. The side plates 1, 2, and 3 are as shown in FIG.
A corner side plate 1 is arranged at the corner part, and intermediate side plates 2 and 3 are arranged alternately at the middle part and are connected in a box shape (box shape without a bottom).
Through holes 38 are formed in the flange portions 36 and 37 of 1 and 22, and a plurality of bolt insertion holes 9 are formed at appropriate intervals on the side edges of the plates 24 to 32. And these are 4 as shown in Figure 2.
The upper and lower four sides of the channel steels 7 to 7 are assembled to an appropriate size using connecting means such as bolts and nuts (not shown). The side plates are made of thicker plates toward the bottom so that they can sufficiently withstand earth pressure (see Figure 3).

The side plates 1, 2, 3 are connected by removable coupling means such as bolts and nuts using channel steel, as described above, and by means of connecting brackets 8, 8, as shown in FIG. Since they are firmly connected, they can withstand the earth pressure during excavation, but for added safety, reinforcing frames are used.

The structure of the reinforcing frame or the number thereof is not limited to the example shown in the drawings, as with other components of the frame, but in the example shown, the reinforcing rods in the horizontal direction are located at the uppermost reinforcing rod 4, at an intermediate position. It consists of a reinforcing rod 4', a reinforcing rod 4'' at the lowest position, and a reinforcing rod 4'' at the bottom.
4', 4'' are made of H-beam steel like the connecting members 20 to 23 in order to reduce costs by using the same material, and the side plates 2, 3 are provided with mounting brackets 10, 4''.
11 and is adapted to be attached by means of connection such as bolts and nuts. In addition to this, stays 5 or auxiliary reinforcing rods 6 may be used as reinforcing materials, but these are not always necessary.

A method of burying a tank using the box-shaped frame constructed as described above will be described below with reference to FIG. 4.

(1) As shown in Figure 4A, dig a hole H at the burial location G to a depth that can be dug. This basic digging is carried out in consideration of work efficiency, and excavation work may be started from the next stage.

(2) Once the bare digging has been completed to the extent that the side wall S will not collapse, install the box-shaped frame A in this hole H. The frame may be assembled on this hole, but it may also be assembled and carried elsewhere (Figure 4b).

(3) Dig out the earth and sand from the lower part of frame A. In this case, when the lower portion D of the side plates 1, 2, and 3 is dug out, the frame body A sinks until the lowest reinforcing rod 4'' touches the ground.Then, the inner portion C of the side plate is dug out.

In this way, it is more convenient to dig out the lower part of the side plate first and then dig out the inner part of the side plate because it prevents the frame A from settling unevenly (No. 4)
Figure C).

(4) By following steps (1), (2), and (3) above, frame A is lowered to the desired depth as shown in Figure 4D.
During this work, the side plates are made thicker as they go downwards, and a reinforcing frame is also used, so the work can be carried out safely and withstands the earth pressure of any soft ground. .

(5) Build the foundation at the bottom of frame A. This foundation consists of a reinforced ground B made of something like gravel and a tank installation stand B' formed on this ground B. Note that the lowest reinforcing rod 4'' is buried in this foundation (Fig. 4 E).

(6) When reinforcing rods 4, 4' are removed, side plates 1, 2,
Since there is a risk of collapse of 3, the top reinforcing rod 4
(remove any obstacles to transporting the tank), hang the tank T with the hanging tool 40, and hang the tank T from the frame A.
(Figure 4). In this case, the tank T is suspended by a hanging device 40 or by an intermediate reinforcing rod 4'.
It is temporarily installed at an intermediate position.

(7) Attach the top reinforcing rod 4. Then, to prevent the risk of collapse, remove the reinforcing rod 4' at the intermediate position,
Hang and install the tank T on the installation stand B' (Figure 4, G).

(8) Side plates, reinforcing rods, which are the constituent elements of box-shaped frame A;
The connecting means such as bolts and nuts that connect the mounting brackets etc. are sequentially removed from the lower part. Fill the parts that have been removed with earth and sand E. In addition, before filling the tank T with earth and sand, pipe 4
1, etc., at a predetermined location (Fig. 4 H).

(9) Frame components such as reinforcing rods should be lifted to the ground using appropriate lifting equipment before being buried in earth and sand. After filling the earth and sand, use the hanging tool 40 to lower the side plate 1,
Pull out 2 and 3 to the ground. A suitable number of through holes 42 are formed in the upper part of the plate so that hooks (not shown) are inserted therein when the plate is pulled out (FIG. 4). The pulling force for the side plates 1, 2, and 3 is not large, but in order to pull them out with a small force, when filling earth and sand around the tank, it is possible to pull them out gradually according to the depth of filling. .

As explained above, according to the tank burying method of the present invention, the tank is buried using a box-shaped frame, so it is safe even in soft ground without using expensive items such as shield piles. This allows for burying work. In addition, the box-shaped frame components can be pulled out after burying work is completed, so they can be used many times by simply applying appropriate measures such as anti-corrosion treatment, thus reducing the cost of burying the tank. It is something. Furthermore, according to the method of the invention, any frame can be used. That is, it is also possible to use a frame that is simpler than the one shown in the drawings depending on the soil quality of the ground.

[Brief explanation of drawings]

1, 2, and 3 are diagrams showing an example of a box-shaped frame used in carrying out the method for burying a tank according to the present invention, and FIG. 1 shows an assembled state. Figure 2 is an enlarged exploded view of one part, Figure 3 is a perspective view.
The figure is a perspective view showing the components of the side plate.
B, C, D, H, H, G, C, and R are schematic diagrams for explaining each step of the method for burying a tank according to the present invention. A...Box-shaped frame, B...Reinforced ground, B'...Tank installation stand, 1, 2, 3...Side plate, 4...Top reinforcement rod, 4'...Reinforcement rod at intermediate position, 4″…lowest reinforcement rod.

Claims (1)

[Claims] 1. A box-shaped frame body that is slightly larger than the tank to be buried and has a reinforcing frame is installed in a predetermined position, the earth and sand in the lower part of the frame body is dug out, and then the earth and sand inside the frame body is removed. A process of digging out and sinking the frame to a desired depth, a foundation installation process of creating a foundation at the bottom of the frame sunk to the desired depth, a tank installation process of installing a tank on the foundation, and a structure of the frame. A method for burying a tank, which consists of a reclamation process in which the connecting means connecting the elements are sequentially removed and earth and sand is filled around the tank, and a process in which the frame components are pulled out to the ground. 2. The method for burying a tank according to claim 1, wherein the box-shaped frame is assembled to a desired depth at a tank burying site. 3. A method for burying a tank according to claim 1 or 2, which uses a box-shaped frame body composed of side plates made of thicker plate materials in the downward direction. 4. In the step of sinking the box-shaped frame, the earth and sand in the lower part of the side plate of the frame is first dug out, and then the earth and sand in the inner part of the side plate is dug out. How to bury the tank described. 5. In the tank installation process, the uppermost reinforcing frame of the box-shaped frame is removed, the tank is temporarily installed in the middle of the frame, the removed reinforcing frame is reattached, and the intermediate reinforcing frame is removed and the foundation is installed. A method for burying a tank according to any one of claims 1 to 4, wherein the tank is installed on a tank. 6. The tank burying method according to claim 5, wherein the tank is suspended from another structure on the ground and temporarily installed at an intermediate position.