JPS60184799A - Cylindrical concrete tank - Google Patents

Abstract

PURPOSE:To increase rigidity of the entire cylindrical wall against a lateral load by fixedly providing a number of stiffeners in an integrated form with a metal liner, which is attachedly provided to the side face of a cylindrical wall body. CONSTITUTION:A defined metal liner 10' is attachedly fixed to the inside surface of an outer tank body, in an integrated form through dowels 9', 9'.... Also, properly designed stiffeners 11, 11 are fixed by welding to the surface, further inside the metal liner 10', being connected to a concrete outer tank body 4 through the metal liner 10' and the dowel 9', to increase the rigidity of the entire outer tank side wall. Accordingly, the concrete outer tank body 4 and the metal liner 10' have the functions of maintaining the inside pressure of tank and isolating the external atmosphere, due to their airtightness and internal pressure resisting strength.

Description

[Detailed Description of the Invention] Technical Classification/Field> The disclosed technology is a concrete cylindrical tank liner.
It belongs to the structural technology field of concrete cylindrical walls, LNG,
Concrete exterior structure of a low-temperature double-shell tank that stores low-temperature liquefied gas such as LPG, or a high liquid dike (High Dike),
Or, it is related to the structural technology of concrete I shell tanks.

<Explanation of the gist> This invention is installed on a predetermined foundation and has an outer tank made of concrete. An invention relating to a concrete cylindrical wall such as a concrete liquid dike for storage (especially a cylindrical high liquid dike placed in the vicinity of a tank) or a cylindrical wall of a single-shell concrete tank for storing oil, water, etc. In particular, the cylindrical wall concrete thickness is thinner than the conventional cylindrical wall concrete thickness, and the cylindrical wall is made of a concrete cylindrical wall main body and a metal liner attached to the side surface thereof via a dowel or the like. It consists of
Furthermore, the invention relates to a concrete cylindrical tank in which the latter has a stiffener integrally fixed to its side surface to support lateral loads such as wind and earthquakes.

<Prior art> As is well known, in recent years, due to changes in the energy situation, the capacity of both service tanks and storage tanks has gradually increased. Heavy-shell tanks and the like are also beginning to be constructed with larger capacity tanks.

Furthermore, concrete structures are being widely adopted in this type of large-scale storage tanks from the viewpoint of disaster prevention and visual performance.

Traditionally, concrete has been often used in single-shell tanks such as water tanks, but in recent years there has been a particularly strong trend toward larger-sized tanks, and concrete has become increasingly popular in low-temperature double-shell tanks for storing NG, Ll)G. There is a strong tendency to construct the outer tank side wall with a concrete structure for disaster prevention or visual reasons, and a breakwater is built in the vicinity of the tank by similar hammering, making it a high liquid breakwater with a circular shape. However, the concrete structure is becoming more and more concrete.

Thus, for example, if a conventional low-temperature double-shell tank is schematically illustrated in FIG. A concrete outer tank 4 is erected, and a bottom cooling tank 5 is installed inside it.
, a side cold insulating material 6, and an inner 4g7 made of low-temperature steel are installed, in which a low-humidity liquefied gas 8 such as LNG or LPG is stored and received.

As mentioned above, these concrete cylindrical tanks have recently become large in size, and in addition to being subject to specification limitations such as internal pressure conditions, they are naturally susceptible to lateral loads such as earthquake loads and wind loads. Therefore, in order to sufficiently withstand and support this, the concrete cylindrical wall must also be made larger.For example, in the case of Figure 1, the storage capacity is 40,000 hours.
The thickness of the LPG tank is 2 rivers of RCl or 1 m.
It is common to design a PC with a concrete outer tank.

Therefore, the thickness and weight of the outer tank 4 made of concrete increase, and the amount of concrete and reinforcement used also increases, resulting in a disadvantage of increased costs and a longer construction period. The problem was that the amount of work was large and the construction work was extremely complicated.

Furthermore, as the concrete outer tank 4 becomes larger and heavier, the specifications of the foundation 3 also increase and its structure becomes more complex.

<Objective of the Invention> The object of the present invention is to solve a series of problems of the cylindrical wall made of low-temperature double-shell tanks, etc. based on the prior art, and to solve the technical problem of the external environment of the cylindrical wall. By separating the connection function for the system, the inherent holding function, and the support function for lateral loads such as wind loads and earthquake loads, we can take advantage of the advantages of -C concrete 1. -b To fully utilize its functions, we will aim to use pumice in the tank, simplify the basic specifications, shorten the construction period, and make it possible to reduce the number of work-outs. It is an object of the present invention to provide an excellent cylindrical tank made of concrete which is useful in the field of tank application.

<Structure of the Invention> ↓The structure of the present invention, which is based on the above-mentioned claims in accordance with the above-mentioned purpose, is to solve the above-mentioned problems by changing the thickness of a foundation on a predetermined ground according to internal pressure conditions, etc. A cylindrical wall made of concrete with a thickness reduced to the desired thickness or 1qj in the vicinity, and with a reduced amount of reinforcement is erected, forming the main body of the cylindrical wall, and either the inner or outer side, or both sides. A metal liner is integrally attached to the metal liner via a dowel or the like, and a stiffener is integrally welded around the inner or outer surface of the metal liner to increase its strength and rigidity. The concrete cylindrical wall main body is used to maintain internal pressure and isolate the tank from the external environment, and the metal liner and stiffener are used to sufficiently resist wind loads, earthquake loads, etc. We took technical measures to reduce the weight of the cylindrical wall as a whole, thereby reducing the weight and simplifying the basic specifications, thereby shortening the first period and reducing costs. It is something.

<Embodiment - Configuration> Next, an embodiment of this invention will be described below with reference to FIG. 1 and FIG. 2. Note that the same parts as in FIG. 1 will be explained using the same reference numerals.

1' is a low-temperature double shell tank which forms the gist of the present invention, and is for storing and receiving low-temperature liquefied gas 8 such as LNG and LPG, and is formed at a predetermined location M2'. An outer tank side wall main body 4' made of concrete such as RC or PC is erected on the foundation 3', and its thickness is 1.
It is thinner than that of Figure 1 and can be 150 to 300 m Ill depending on the design.
The amount of RCl or PC concrete used and the amount of reinforcement are sufficiently small, so the weight is sufficiently small.

In the formation of the outer tank side wall body 4', the RC
1, or fix the well-known dowels 9', 9, etc. inside the PC.

However, in the embodiment shown in C1, the outer tank body 4'
A metal liner 10' of 7 positions is attached and fixed to the inner surface of C through the dowels 9', 9', . . . .

Further, on the inner surface of the metal liner 10', a stiffener (wind carder) 11.11 is provided as appropriate.
The metal liner 10' is fixed by welding and connected to the concrete outer tank side wall main body through the metal liner 10' and the dowel 9', thereby increasing the rigidity of the entire outer tank side wall.

Therefore, the concrete outer tank main body 4 and the metal liner 10' have the function of maintaining the internal pressure of the tank and blocking the outside air due to their geometric density and internal pressure resistance, and also have the function of blocking the outside air. -11 is connected to the metal liner 10' and the concrete side wall body, so that they are integrally formed to have sufficient strength and rigidity against lateral loads such as wind loads and earthquake loads.

Then, a bottom cold insulating material 5 is laid on the foundation 3, and a side cold insulating material 6 is placed inside the metal liner 10 to form an inner tank 7' made of 9% nickel steel, aluminum quilted steel, etc. The low-temperature double-shell tank 1' is constructed with an outer tank roof, and the storage volume c) of low-temperature liquefied gas 8 such as LNG or LPG is stored inside the inner tank 7 for operation. .

<Embodiment - Effect> In the above-described configuration, the concrete outer tank side wall body 4' and the metal liner 10' of the low-temperature double shell tank 1'
Outside I! 4' to maintain pressure and vertical load, etc.
At the same time, the external environment and the internal environment of the tank are shut off, and in this state, the low temperature liquefied gas 8 is received and dispelled in a predetermined manner.

Unfortunately, before wind loads and earthquakes! J′! For horizontal carts such as
Concrete I - The outer tank side wall body 4' is integrated and has high rigidity. , can fully counter the double shell tank 1
' functions are not impaired in any way.

Note that the embodiments of this invention are limited to the above-mentioned embodiments.C4h
Of course, for example, a metal liner (for example, a metal liner may be attached to the outer side 1111 of the side wall body of the outer alveolar cistern), and a sudinner may be attached to the outer surface of the metal liner. The aspects of the gods are adopted.

<Effects of the Invention> According to the present invention, a stiffener is attached to the C1 metal liner in a large concrete tank; this increases the rigidity of the entire cylindrical wall against the horizontal cart. Therefore, the concrete specifications for the cylindrical wall do not have to be large-scale, and the amount of concrete used is the smallest. Therefore, the construction period is shortened, and it is possible to reduce the monthly usage rate and cost. There is a possible effect.

In addition, since the weight of the cylindrical wall is reduced, the foundation specifications that support it do not have to be as large-scale as a result, and the foundation construction period is naturally shortened, resulting in shorter construction times and lower construction costs overall. The effect is produced.

Also, since a metal liner with a stiffener is attached to the side of the concrete cylindrical wall, the construction work may be increased accordingly, but the overall cost and construction period can be reduced. There is an effect that can be done.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of a low-temperature double-shell tank based on the prior art, and FIG. 2 is a partial sectional view of one embodiment of the present invention. 3'...Foundation, 7'...Inner tank, 4'...Outer tank, 1'...Low temperature double shell tank, 4'
...Outside 411! Main body, 10'...metal liner,
11...Stinoner Applicant Kawasaki Heavy Industries, Ltd.

Claims (1)

[Claims] In a cylindrical tank installed on a foundation, the cylindrical wall consists of a concrete cylindrical wall body and a metal liner attached to the side surface of the concrete cylindrical wall body, and the metal liner has a number of stiffeners on the side surface. A cylindrical concrete tank characterized by being fixed in one piece.