JPS604066B2 - composite tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in large volume storage tanks for petroleum and other liquids.

BACKGROUND ART Conventionally, a steel storage tank for petroleum or other liquids has been constructed on solid ground 2' with a tank 1' that has been improved, as shown in FIG.

However, this conventional steel tank had the following problems.

'1} In order to avoid uneven settlement, etc., it is necessary to construct an extremely strong foundation by conducting ground training, etc., which requires a large amount of construction time and man-hours.

Therefore, the cost also increases. '2} Since the lower outer periphery of the tank needs to have a strong shell structure, a huge amount of steel material is required, leading to an increase in costs. '3' The contact area between the tank and the base is prone to corrosion.

The present invention aims to propose a composite tank made of concrete and steel that eliminates such problems, and is composed of a lower cylinder made of reinforced concrete in the form of a watertight cylinder with a bottom part erected on the ground, and a lower cylinder made of reinforced concrete made of steel. an upper cylindrical body made of aluminum, and reinforcing bars welded in the form of legs to the lower end of the upper cylindrical body and anchors made of sheet metal are embedded within the upper edge of the lower cylindrical body. Since the present invention is constructed as described above, the lower cylindrical body can be easily reinforced with reinforced concrete, and the steel tank part is used only in the upper part, so it has the following advantages compared to conventional steel tanks. be. {
Since the lower cylinder will also serve as the regular foundation, there is no need for any special ground reform, and the completion of the lower cylinder also means the simultaneous completion of the foundation, so the construction period and man-hours are extremely short.

Therefore, the cost is also lower. [o- Since there is no need to make the lower outer circumference of the tank a shell structure, the amount of steel input can be reduced, reducing material costs. Since the lower part is a concrete cylinder, the contact area between the tank and the foundation will not corrode.

Next, one embodiment of the present invention will be described with reference to the drawings.

In FIGS. 2 and 3, 1 is a steel upper cylinder with an anchor 6 and reinforcing bars 8 in the upper edge of a lower cylinder 2, which will be described later, and its lower end is buried; 2 is an upper cylinder erected on the ground 01. bottom 2A
2A is the bottom of the lower cylinder 2, and 3 is the lower cylinder 2 provided in an eave shape on the outer periphery of the boundary between the upper cylinder 1 and the lower cylinder 2. 4 is a rainproof plate for the purpose of preventing rainwater from seeping into the lower cylinder 2, which is attached to the upper green of the lower cylinder 2 directly below the rainproof plate 3. 5 is a vertical main reinforcing bar of the reinforcing steel constituting the lower cylinder 2 made of reinforced concrete; 6 is a waterproof material for the part buried in the lower cylinder 2 near the lower end of the upper cylinder 1; An anchor made of sheet metal is welded to increase the holding force to the concrete 9, 7 is a tie bar that constitutes the lower cylinder 2 as a cross member for the main reinforcement 5, and 8 is to ensure sufficient bite with the concrete 9. , reinforcing bars welded in the shape of legs to the lower end of the upper cylindrical body 1, and 9 are concrete constituting the lower cylindrical body 2.

In the above configuration, the main reinforcing bars 5 and the tie bars 7 are arranged in a grid pattern, and the reinforcing bars 8 are arranged uniformly over the entire circumference of the lower cylinder 2 at appropriate intervals. Also, the thickness and the length of the top and bottom of the reinforcing bar 8 affect the holding force of the upper cylinder 1, but the experimental results show that it is good when the length is about 10 inches of the diameter on the diameter 10 to 32 side. However, the results are not limited to these teaching platforms.Next, the effects of the above embodiment will be explained.

As shown in FIG. 2, the upper cylinder 1 and the lower cylinder 2 combine to form a cylindrical tank, which functions as a container for storing, for example, oil. In that case, the lower cylinder 2
It is made of so-called reinforced concrete consisting of main reinforcement, tie reinforcement 7 and concrete 9, so it is very strong and the bottom part 2A
Since it covers the ground 01 over a wide area and has sufficient ground pressure resistance, it exhibits the same effect as if the entire bottom 2A were a foundation, and is extremely stable and strong. Therefore, the foundation work required in the case of a simple steel tank as a secondary tank can be omitted. Next, a conventional steel tank requires a steel bottom, and the surrounding area is far below the top to accommodate the hydraulic pressure depending on the depth of storage, the rolling moment and increased G during an earthquake. However, in this embodiment, the lower cylinder 2, which also serves as the foundation, takes care of the bottom, so there is no need for a steel bottom.Moreover, the lower cylinder is extremely strong, so it is not necessary to use the above-mentioned conventional structure. There is no need for downward reinforcement, which would be required for a tank with a kettle. Therefore, the bottom of the steel tank and reinforcing materials are not required. Also, unlike the conventional structure in which a steel tank is mounted on a foundation, the structure is such that the foundation is the bottom of the tank, so there is no exposed steel plate below, and therefore the tank is There is no risk of corrosion near the contact area with the foundation. In the above embodiment, the planar shape of the upper cylinder 1 and the lower cylinder 2 was assumed to be circular, but the shape is not limited to circular, and may be oval, polygonal, or polygonal.

Furthermore, the ceiling of the upper cylinder 1 may be either covered or uncovered, or it may be provided with special additional devices, equipment, etc. The lower cylindrical body 2 may be optionally subjected to an appropriate oil-proofing treatment (treatment to prevent oily liquid from penetrating). As specifically explained above regarding the embodiments of the present invention, the lower cylindrical body can be easily strengthened with reinforced concrete, and the steel tank part is used only in the upper part, so compared to the conventional steel tank, it is It has the following advantages.

[Brief explanation of drawings]

FIG. 1 is a side view of a conventional example, FIG. 2 is a vertical sectional view of an embodiment of the present invention, and FIG. 3 is a detailed view of the portion surrounded by m in FIG. 1...Upper cylinder, 2...Lower cylinder, 5...Main reinforcement, 6
... Anchor, 7... Stirrup, 8...
Reinforced steel, 9...concrete. Tsutomu Figure 2 Leopard Figure 3

Claims (1)

[Claims] 1 Consisting of a watertight cylindrical lower cylinder made of reinforced concrete with a bottom part erected on the ground and an upper steel cylinder, with reinforcing bars and sheet metal anchors welded in the shape of legs to the lower end of the upper cylinder. and embedded in the upper edge of the lower cylindrical body.