JPS6058370A - Composite structure storage tank and construction method thereof - 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 storage tank with an enclosed structure constructed from various structural materials and a method for constructing the same.

Conventionally, storage tanks have two structures: steel structures made of thin copper plates and reinforced concrete structures, and each has the following advantages. There are disadvantages. In other words, the former has excellent airtightness and waterproofness, but has problems with buckling, heat insulation, and rust prevention, while the latter has excellent buckling, heat insulation, and rust prevention, but has problems with airtightness. There is a problem that it is inferior in durability and waterproofness. Therefore, a storage tank having a copper plate reinforced concrete structure is known as a storage tank that has solved this problem. This structural type uses steel plates as structural materials by placing steel plates on the inside of the storage tank and reinforced concrete on the outside, and has the advantages of both of the above-mentioned construction types. L7]-5 In this type, there is a problem with the integrity of the steel plate and the concrete IJ'-1-, and the toughness is poor. ) and sub-bins (Y) between these main bins (01 in the figure is steel plate, OG is concrete), the sub-bins (Y) are located between the hopper mounting part and the roof section. There is a problem that the steel plate has to be discontinuous and the airtightness of the sub-bin (Y) cannot be maintained sufficiently.

In addition, the following methods are used to construct this type of storage tank. One of them is the special public service in 1970.
There is a method disclosed in Japanese Patent No. 2, in which a first-stage annular inner wall made of glue 11 is manufactured, a shear connector is welded to the outside of the annular inner wall, and reinforcing bars are further arranged through the shear connector. Next, the inside of the annular inner wall is reinforced with shoring, an outer form is provided at a predetermined interval using cylindrical form ties on the outside, and concrete is poured between the inner wall and the outer form.
Form the storage tank wall. Next, a second stage storage tank is formed in the same manner, but in this case, the first
Using the holes formed in the tiered storage tank wall, the shoring and outer formwork are opened several times and concrete is poured in. This process is repeated to construct a storage tank of a predetermined height. 1. As another construction method, reinforced concrete storage JHL17 M4
There is one that uses the Tj1 so-called slip-slip form construction method, which is commonly used for construction. Another method is to make the entire storage tank into parts and erect the precast boards manufactured by Ageo on site.
A method of completing the storage tank 4/EH by welding the joints and filling with mortar has also been developed, and the 'f7' construction method is similar to that of steel 4JJ storage tanks. However, among the above construction methods, the first method is not the slip form construction method, and requires provision of temporary scaffolding on the entire outside.
j! In addition to the types of construction work required under I, work such as erecting and welding steel plates and installing shear belts is required, which makes on-site work complicated and has the problem of poor construction efficiency. When constructing a group of silos with 5 main bins and sub-bins between the main bins, it is necessary to construct all the works at the same height at the same time. In addition to requiring manpower and equipment such as cranes, it also requires multiple skills such as reinforcing bar work, concrete work, and mechanical operator accommodation, and has the disadvantage that the construction work is complicated and difficult to complete. In addition, in the second construction method, since the slip form construction method is used, it is necessary to intersect the yoke when assembling the copper plate, so the copper plate is constructed into small pieces and the pieces are welded. There is a problem that the knee 11 cost becomes very large.

In addition, when constructing a group of silos in the first place, it has the same difficulties as the above-mentioned 10th construction method. Furthermore, in the third construction method, the size of the parts cannot be increased for transportation, so there is a problem that the number of parts is large, and therefore the number of welding steps is also extremely large. In addition, each part must have a structure in which reinforcing bars are joined one by one to the copper plate frame on each side by welding, etc., so the number of welding man-hours and 6i *3'',! There are many problems, such as increasing production costs. Furthermore, there is also the problem that the transportation cost increases significantly depending on the transportation distance.

The present invention was devised in view of the problems of the conventional 11" storage tank and its method, and it is applicable to the toughness of the tank itself, as well as to the group 11. Even in the case of the construction, we would like to provide a suitable method for constructing a sheet metal plate (1) and its construction, which can properly obtain the capacity of the secondary bottle.

For this reason, the present invention has a shear connector on one side, and the inner wall needles are arranged so that the shear connectors face each other. The fact that it has a wall structure with a force of When building a storage tank by dividing it into several stages in the height direction (lo and gamma), for each stage, an inner wall steel plate with a shear connector on one side and an outer wall copper plate are arranged so that the shear connectors face each other, and the inner wall The work scaffold placed inside the steel plate prevents the inner wall steel plate from deforming inward (one basic feature is that concrete is placed between both steel plates). As a collection method, an inner wall steel plate and an outer wall steel plate each having a shear connector on one side are arranged so that the shear connectors face each other to construct a steel tank, and the steel tank is sealed to reduce the internal pressure. Another basic feature is that concrete is poured between the inner wall steel plates and the outer wall steel plates.

The present invention will be described below with reference to embodiments shown in the drawings.

Figure 2 shows a cross section of a composite storage wall structure according to the present invention, in which (1) is a steel plate for the inner wall, (2) is a copper plate for the outer wall, and (3)
) is the concrete poured between these thumbtack boards.

A shear connector (4) is provided on the opposing surfaces of both plates.

In the present invention, the concrete 1,1- is cast without reinforcing bars, and is made to have strong toughness even through hardening.

Fig. 3 shows the storage tank structure of the present invention as shown in Fig. 2 applied to a group silo. Formed using the outer wall;
jl is a sub-bin.

In the outer height direction of the outer wall steel plate (2) constituting each main bin (X), two fins (5) are provided 71 so as to face each other between adjacent main bins. The opposing fins (5) are severely damaged by the joint steel plates (6), and two gonks are created in the gap between the joint steel plates formed by this! j −) (7) is poured into the hole, and the hole forms part of the wall of the sub-bottle (Y).

Figure 4 shows -'-4? of the above-mentioned composite structure storage tank. This refers to the Ii construction method, in which the storage tank is built in several stages in the height direction, and the steel plate construction and concrete work are performed for each stage.

That is, the inner wall #4 plate (1) and the outer #4 gamma plate (2) (steel plate ring in this example) each having an appropriate outer height h are hung by a crane or the like, and each of the lower copper plates is stacked in two parts. After welding and fixing, concrete IJ-) (3) is poured between the drawing boards to construct one layer, and after the concrete hardens, proceed to the fire layer.

The storage tank is then completed by repeating the above steps for each layer. In the process of construction, the present invention uses special shoring to prevent deformation (protrusion) of the inner side of the inner wall copper plate (1) during concrete pouring. ” to prevent this.

A bracket (9) for supporting the scaffold is provided on the inner side top 7i+S of the inner wall copper plate (1). The work scaffold (8) has a scaffold part (81) above the joint part of the bracket (9), and the work beach is It is located so that concrete can be placed on the construction layer and the copper plates of the next layer can be welded.The work scaffold (8) is placed around the entire circumference of the inner wall steel plate of the construction layer, or at least at the same number of places around the circumference. The support part that should be supported from inner full11 (u'41 not shown)
This feature appropriately prevents the inner wall steel plate from protruding inward during concrete 1 pouring. For example, in the case of 41"L shown in FIG. 3, the support portion (82) is fitted at several points in the circumferential direction of the circular work scaffold (8).

As shown in Fig. 4, the working scaffold (8) is supported by the brackets +- (9a) of the layer (xOa) in which =1 concrete is hardened, and the upper portion of the scaffold (81) is Concrete 1 and ladle work for the layer (xob) and '11.1 board bathing work for the soil layer (10c) are carried out. Then, after these photons (and concrete 01 conversion), the work scaffold (8) is moved upward by a crane, etc., and the bracket of the layer (1ob))
9b) and apply the next layer.

In addition, when performing construction for a secondary bin as shown in 3.j., a working scaffold (8') is installed using the outer wall steel plate (2) as a scaffold support, and the joints for each layer are This is for welding steel plates (6) and placing concrete.

Figure 5 shows another type of ladle construction.
This method performs the concrete pouring work separately and independently, and, like the construction method 1 above, it is possible to perform the concrete pouring work without the need for supporting the inner wall steel plate. be.

In this construction method, as shown in Figure 5 (A), the inner wall nail plate () and the outer wall nail plate (2) are piled up and welded, and the nail plate (2) for the outer wall is stacked and welded. Build the whole thing. Copper shell 01) b Lower part 1 (with a popper (not shown) 1/, place it on the soil part 1. Remove 0 pieces;] Scrape off the shell.

Close the 1lj part of the pot number J hinoki 00 (['DO Danζkin 1:, :(inside)], and as shown in Iu'l rll (B), K, air compressor 5' ( 1 not shown] to apply an internal pressure P that can counter the lateral pressure of the fresh concrete being poured.In this state, the concrete is placed between the inner wall button (1) and the outer wall plate (, 2). -1-(3) is used to pour dust, and the same wall plate (
1) is properly prevented from protruding inward.

Once the construction is completed as described above, the air inside the tank is removed and the construction is completed in the state shown in (C). Note that α3 is a temporary beam, and this temporary beam θ→ is ! '=i
&! f27 After QJI's 4M construction, it was installed on 0 and 2 soil! 15. When air pressure is applied inside the tank, the roof θ′1
5 is outward i・,;! : It has the ultimate ability to suppress rips and spills, and can also be used as a footwall when pouring concrete from above.

In addition, the concrete (3) can be placed by press-fitting from a part of the tank or from the bottom. tfC
, 1J7 for the secondary bottle shown in Figure 3.
The composite structure storage tank of the present invention, which is obtained by applying the joint plate (6) from below with soil, and then placing the concrete (3), Inner wall copper plate (1) with one side connection (4) and external electrical control panel (2)
Because the concrete is poured between the steel plate and the concrete wall, it is possible to obtain excellent airtightness due to the drawing board, and also to ensure that the steel plate and concrete do not overlap. It has high integrity and can have a structure with excellent toughness. In other words, the concrete penetrates into the steel plate with the shear connector.
Because of its structure, even when the concrete is subjected to heavy loads, the concrete becomes triaxially stressed due to the restraint effect of the steel plates, and toughness that can be achieved without reinforcing bars can be obtained. In addition to these advantages, when constructing a group silo, as shown in Figure 3, the inner and outer wall steel plates (1) and (2) are used for the airtight material and structure of the main bin (X) and sub-bin (Y). It is economical because it can be used as a material, and since concrete acts as an anti-buckling material or a compression material, the thickness of the steel plate can be made extremely thinner than conventional ones.

In addition, according to the 414 construction method of the present invention, the inner and outer wall steel plates (1
) and (2) are the formwork allowances, and the lateral pressure due to concrete pouring is due to the outer wall steel *, and (2) is due to the hoop tension of the steel plate itself, and the inner wall hook plate (1) is is supported by the hoop tension and the working scaffold (8) or the tank internal pressure P, so the steel plate protrudes due to lateral pressure 3i without shoring or edge angle f'9:
Can be appropriately prevented. 'Furthermore, both the drawing boards on the outside wall of the vinyl are self-contained, with approximately 9 joints, and only membrane stress acts on them, so there is little deformation, so there is no need for 4 tons of form ties for steel plates. moreover,! If you want to raise a Western-style baby, please prepare a separate JL book 17. for each bottle. It is important to complete the work publicly and independently, and for this reason, compared to the conventional method, it is necessary to complete the work at one time.
It is possible to significantly reduce the number of engineering/jf equipment, etc.

In particular, the second unexploded dyeing method shown in Figure 4 has the following advantages: j+ra nru. As mentioned above, the construction of a conventional composite GI storage tank requires a lot of work such as steel plate erection work and concrete work, etc. for one storage tank. Since the work is carried out alternately, there is a problem that the work management becomes complicated and the work efficiency is very poor.In contrast, according to the method of the present invention, the steel plate (
Since the steel tank is erected and then the concrete is poured, construction management becomes easier and the actual efficiency during construction is greatly improved.

In addition, as an effect of the tank internal pressure P, a tensile force acts on the steel tank αυ in the axial direction due to the pressure acting on the roof θ'3 and the hopper, so the tank itself is made of thin steel plate. It can fully withstand the load during construction without buckling. Further, although the storage tank is subjected to an airtightness test after completion, in the present invention, this test can also be used to apply the above-mentioned internal pressure P during construction.

Furthermore, in the method of the present invention, the tensile stress in the steel plate is released by removing the air from the tank after completion, so compressive stress acts on the hardened concrete as breath stress, which helps prevent cracks in the concrete. It will be done.

In addition, in the present invention, steel plates and concrete (
Although the present invention is intended for use in steel plates (or reinforced concrete), it can also be applied to composite structures in which various materials are used, such as synthetic resin plates instead of steel plates and foamed polyurethane 19 instead of concrete.

The present invention described above provides a composite structure in which the rust plate and concrete are integrated, exhibiting excellent toughness, and which can appropriately ensure the airtightness of sub-bins when applied to group silos, etc. Furthermore, the storage tank having such a structure can be made efficiently and economically in a short period of time without having to use equipment such as shoring or end corners.In addition, the present invention particularly According to the second O'14 ritual, in addition to the above-mentioned effects, construction management can be simplified and the concrete work can be completely separated from the concrete work.
It is possible to improve the efficiency of the tank, and furthermore, even if a thin steel plate is used, the tensile force applied in the axial direction of the tank due to internal pressure will reduce the
It has excellent effects such as being able to withstand the load during construction without any damage.

[Brief explanation of the drawing]

FIG. 1 is a horizontal IM view of a group silo with a conventional storage tank structure. FIG. 2 is a longitudinal sectional view showing the wall structure of the storage tank of the present invention. FIG. 3 is a horizontal sectional view when the storage tank of the present invention is applied to a group of silos. FIG. 4 is an explanatory diagram showing the implementation status of the first construction method of the present application. FIG. 5 is an explanatory diagram showing the implementation status of the second construction method of the present application. In the figure, (1) is the inner wall steel plate, (2) is the outer wall tone plate,
(3) is concrete, (4) is Siakoi lid, (8
) is a work scaffold, and 0υ is a steel handle. 'l'! rrl Applicant Nippon Kokan Co., Ltd. Inventor Nagisa
Hiroshi Matsumura, Masato Sasaki, Katsudo, Shun Ohara - Deguchi G, Harudo Kiuchi, Sadato Kiuchi] - 11 patent attorneys 71 Masato Hara, Figure 1, Figure 2, Figure 3, X (Figure 4)

Claims (3)

[Claims] (1) Cast between an inner wall copper plate and an outer wall steel plate, which have a shear connector on one side and are arranged so that the shear connectors face each other, and the drawing board! A composite structure storage tank with a wall structure made of concrete. (2) When constructing a storage tank in several stages in the height direction,
For each stage, an inner wall copper plate and an outer wall steel plate having a shear connector on one side are arranged so that the shear connectors face each other,
A method for constructing a composite structure storage tank, comprising: pouring concrete between an inner steel plate and an outer steel plate while preventing the inner steel plate from deforming inward using a work scaffold placed inside the steel plate. (3) A steel tank is constructed by arranging an inner wall steel plate and an outer wall steel plate with shear connectors on one side so that the shear connectors face each other, and the steel tank is sealed and internal pressure is applied while the inner wall copper plate and Method 7 for constructing a composite structure storage tank characterized by pouring concrete between outer wall copper plates