JPH11227880A - Tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tank for which cost is curtailed while using stainless steel. SOLUTION: A tank 1 is constructed of a bottom plate 2 and a side wall 3. The side wall 3 is composed of a prestressed concrete side wall main body 4 in a cylindrical shape, a stainless steel inner covering member 5 that covers the internal surface 4a of the side wall main body 4, and a stainless steel outer covering member 6 that covers the external surface 4b of the side wall main body 4. The inner covering member 5 is made up of inner forms that are used for forming the side wall main body 4, and the outer covering member 6 is likewise made up of outer forms that are used for forming the side wall main body 4. With prestressed concrete that is strong to tensile force used in addition to stainless steel as material for forming the side wall 3, the amount of stainless steel to be used can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank which uses stainless steel and has a reduced cost.

[0002]

2. Description of the Related Art Conventionally, for example, a tank serving as a reservoir for drinking water is generally
It was made of concrete. However, in the case of a concrete reservoir, it was necessary to apply a waterproof treatment to the surface, such as applying an epoxy resin. Thus, in recent years, stainless steel distribution reservoirs have become widespread because there is no need for waterproofing and the appearance is beautiful. However, the larger the reservoir, the thicker the upper side wall must be.As a result, if the reservoir is made of stainless steel, it will not be costly compared to the case of concrete. Did not get.

[0003] The present invention has been made to solve the above-mentioned conventional drawbacks, and an object of the present invention is to provide a tank which uses stainless steel and has a reduced cost. Another object is to provide a tank capable of reducing a change in temperature of a liquid or the like stored in the tank.

[0004]

A tank according to the present invention has the following configuration to achieve the above object. That is, in the tank according to the first aspect of the present invention, the side wall includes a side wall body made of prestressed concrete;
A stainless steel covering member for covering the inner surface and / or the outer surface of the side wall main body. And the said covering member consists of the mold at the time of shape | molding the said side wall main body. Thereby, on the side wall, the side wall main body mainly made of prestressed concrete bears the pressure of the contents such as the liquid put into the tank. As described above, by using prestressed concrete having high tensile strength in addition to stainless steel as the material of the side wall, the usage of stainless steel can be reduced. Further, the covering member is also a mold for molding the side wall main body, and it is not necessary to remove the mold after molding the side wall main body, thereby facilitating the construction of the tank.

[0005] In the side wall in which the inner surface of the side wall main body is covered by a stainless steel covering member, the stainless steel covering member covering the inner side surface of the side wall main body comes into contact with a liquid or the like to be put into the tank. Therefore, a tank composed of a side wall in which the inner side surface of the side wall body is covered with a stainless steel covering member is suitably used as a tank for storing liquid and the like.

[0006] Further, in the side wall in which the outer surface of the side wall main body is covered by the stainless steel covering member, the side wall main body does not become exposed to the outside.

Further, as in the tank according to the second aspect of the present invention, the covering member includes an inner covering member that covers an inner surface of the side wall body and an outer covering member that covers an outer surface of the side wall body. Embedded in the side wall main body, one side is engaged with a first engaged portion provided on the side wall main body side of the inner covering member, and the other side is the outer covering member of the outer covering member. It is desirable to have a holding member that engages with the second engaged portion provided on the side wall main body side and holds the inner covering member and the outer covering member at a predetermined interval. Thereby, when molding the side wall main body by the holding member,
The inner covering member serving as the inner formwork and the outer covering member serving as the outer formwork are held at a predetermined interval, and thus are disposed outside the formwork, which is necessary for a type of formwork that is removed after curing. It is possible to eliminate the need for a form holding material and other fastening hardware. Further, the holding member prevents the inner covering member and the outer covering member from being peeled off from the side wall main body after the side wall main body is cured.

Further, as in the tank according to the third aspect of the present invention, the inner covering member is provided with first ribs protruding toward the side wall main body and running in directions crossing each other. The outer covering member may be provided with a second rib protruding toward the side wall main body and running in a direction crossing each other. In this manner, the first rib and the second rib can secure the strength without increasing the thickness of the inner covering member and the outer covering member, and when the side wall main body is molded, the inner covering member and the outer covering member can be secured. The outer covering member is
It can easily withstand the pressure of cast concrete. In addition, since the first rib and the second rib protrude toward the side wall main body, the first rib and the second rib do not appear on the surface of the side wall.

Also, as in the tank according to the invention, the first engaged portion is provided on the first rib, and the second engaged portion is provided on the first rib. The second rib may be provided. In this way, by providing the first engaged portion on the first rib of the inner covering member, the first engaged portion is easily provided on the inner covering member. Similarly,
By providing the second engaged portion on the second rib of the inner covering member, the second engaged portion is easily provided on the inner covering member.

Further, as in the tank according to the fifth aspect of the present invention, the covering member includes a plurality of covering member structures constituting the covering member, and the covering member structure includes:
It is preferable that an engagement recess is provided on one side of the joint portion connecting the covering member structure, and an engagement protrusion fitted to the engagement recess is provided on the other side. As a result, the covering member structures are joined together so that the engaging protrusions on the other side are fitted into the engaging recesses on one side, so that when the side wall main body is formed, the fresh concrete that is cast is formed. It is difficult for the cement paste inside to flow out of the seam.

[0011] Further, as in the tank according to the invention of claim 6, the covering member is provided with a rib running in a height direction, and the covering member has an axis in the height direction. It may be formed to be bendable. Thereby, the strength of the covering member is ensured by the rib running in the height direction. Moreover, when the covering member curves around the height direction, the rib running in the height direction does not prevent the covering member from bending. Further, since the covering member is curved around the height direction as an axis, it can be suitably used as a mold for forming a cylindrical side wall.

Further, like the tank according to the invention of claim 7, the coating member has an inner coating member that covers the inner side surface of the side wall main body. It may be composed of a plurality of inner covering member structures constituting the inner covering member, and the main body of the inner covering member structure may be formed into a flanged convex body by press working. As described above, the strength of the inner covering member constituting body is improved by forming the main body of the pressed body with a flange with a flange.

[0013] Further, as in the tank according to the invention of claim 8, the covering member includes an outer covering member that covers an outer surface of the side wall main body, and the outer covering member and the side wall. It is desirable to provide a heat insulating material between the main body and the main body. Thus, the heat insulating material reduces a change in temperature of the liquid or the like stored in the tank. Moreover, even when the temperature of the liquid or the like is low and the temperature of the outside air is high, the heat insulating material makes it difficult for the surface of the outer covering member to form dew.

Further, as in the tank according to the ninth aspect of the present invention, the outer covering member includes a plurality of outer covering member structures constituting the outer covering member, and a main body of the outer covering member structure. It is preferable that a protrusion is provided between the both ends in the circumferential direction so as to bend or curve and protrude to the side opposite to the side wall main body side and run in the height direction. Thus, when the outer covering member structure is expanded by thermal expansion, the expansion due to the thermal expansion is absorbed by the protrusion of the outer covering member structure.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tank according to the present invention will be described below with reference to the drawings.

1 to 4 show a first embodiment of a tank according to the present invention. The tank 1 is, for example, a storage tank used as a distribution reservoir for tap water, and includes a concrete bottom plate 2 and side walls 3. Further, the side wall 3 covers a cylindrical side wall main body 4 made of prestressed concrete and an inner side surface 4a of the side wall main body 4.
An inner covering member 5 made of stainless steel and an outer covering member 6 made of stainless steel and covering the outer side surface 4b of the side wall main body 4 are provided. The inner covering member 5 is formed of an inner formwork when the side wall main body 4 is formed. Similarly, the outer covering member 6
The side wall body 4 is formed of an outer mold frame for molding. In other words, the inner mold and the outer mold when forming the side wall body 4 are integrated with the side wall body 4 without being removed after the formation of the side wall body 4, and the inner cover member 5 and the outer cover are respectively formed. It becomes member 6.

The inner covering member 5 is composed of a plurality of inner molds, that is, inner covering member structures 5a, 5a, which are divided and arranged in the circumferential direction and the height direction. further,
The inner covering member structure 5a is formed on the inner surface 4 of the side wall main body 4.
and a horizontal rib 5c, 5c and a vertical rib 5d, 5d protruding from the inner coating member component body 5b toward the side wall main body 4 from the inner coating member component body 5b. I have. The horizontal ribs 5c, 5c divide the upper end portion, the lower end portion, and the upper end portion and the lower end portion of the inner covering member body 5b equally (in the illustrated embodiment, into four equal parts). It protrudes from the position to run in the circumferential direction. The horizontal rib 5c at the upper end is formed with columnar projections 5e and 5e protruding upward, and the horizontal rib 5c at the lower end is provided with these inner covering member structures 5a and 5a. Holes 5f and 5f are formed to be fitted with the protrusions 5e and 5e of the lower inner covering member structure 5a when stacked in the vertical direction. The upper and lower ends and the middle horizontal ribs 5c, 5c are provided with a plurality of vertically penetrating holes 5g in order to allow air bubbles in the poured concrete to escape when the side wall body 4 is formed. 5
g is formed. Further, at appropriate positions of the horizontal ribs 5c, 5c, engaged holes 5h, 5h as first engaged portions with which the holding members 7, 7 described later are engaged are formed.
The vertical ribs 5d, 5d protrude from both ends (and the middle) in the circumferential direction of the inner covering member main body 5b so as to run in the height direction. In this way, the inner covering member constituting body 5a has the first
Horizontal ribs 5c, 5c and vertical ribs 5
d and 5d are provided.

And, these inner covering member constituting bodies 5a,
5a is an inner covering member structure 5a adjacent in the circumferential direction,
The vertical ribs 5d and 5d of 5a are overlapped, and the vertical ribs 5d and 5d are assembled by being connected by bolts 8,8. In addition, these inner covering member structures 5a, 5a are provided with a horizontal rib 5c located at the upper end of the lower inner covering member structure 5a, and a lower end of the upper inner covering member structure 5a in the height direction. Horizontal rib 5 located on
c are stacked so as to be overlapped via the packing 9. At this time, the lower inner covering member structure 5
a of the upper inner covering member structure 5a
Are fitted so that the lower and upper inner covering member structures 5a, 5a do not shift from each other.

Similarly, the outer covering member is also provided with a plurality of outer formwork divided and arranged in the circumferential direction and the height direction.
That is, it is composed of the outer covering member structures 6a, 6a. Further, the outer covering member structure 6a covers the outer surface 4b of the side wall body 4 and protrudes toward the side wall body 4 from the plate-like outer covering member body 6b. , Horizontal ribs 6c, 6c and vertical ribs 6d, 6d. Horizontal ribs 6c, 6
c is an upper end portion, a lower end portion, and a position where the upper end portion and the lower end portion are equally divided (in the illustrated embodiment, divided into four equal parts) of the outer covering member body 6b.
It protrudes so as to run in the circumferential direction. Horizontal rib 6 at upper end
c, columnar projections 6e and 6 protruding upward.
When the outer covering member structures 6a, 6a are stacked in the height direction on the horizontal rib 6c at the lower end, the protrusions 6e of the lower outer covering member structure 6a are formed. , 6e are formed with holes 6f, 6f. The upper and lower end portions and the middle horizontal ribs 6c and 6c are provided with a plurality of vertically penetrating holes 6g to release air bubbles in the poured concrete when the side wall main body 4 is formed. 6 g are formed. Further, at positions of the horizontal ribs 6c, 6c facing the engaged holes 5h, 5h of the inner covering member constituting body 5a, a second engaged portion with which holding members 7, 7 described later are engaged is provided. Engaged hole 6
h and 6h are formed. Also, vertical ribs 6d, 6d
Protrudes from both ends (and the middle) in the circumferential direction of the outer covering member structure main body 6b so as to run in the height direction. In this way, the outer covering member structure 6a is provided with the horizontal ribs 6c, 6c and the vertical ribs 6d, 6d as the second ribs, which run in the directions crossing each other.
Then, in the same manner as the inner covering member structures 5a, 5a,
These outer covering member structures 6a, 6a are assembled in the circumferential direction and the height direction.

The tank 1 has holding members 7, 7 embedded in the side wall body 4. This holding member 7
In the example, both ends of the bar are bent in the same direction and at a right angle from the intermediate portion, and male threads 7a, 7a are formed in the bent portions. Then, the bent one side 7b of the holding member is inserted into the engaged hole 5h formed on the side wall main body 4 side of the inner covering member structure 5a, and engages with the engaged hole 5h, and The other side 7c bent
Is inserted into the engaged hole 6h formed on the side wall body 4 side of the outer covering member structure 6a, and is engaged with the engaged hole 6h. Thus, the holding members 7, 7 hold the inner covering member structures 5a, 5a and the outer covering member structures 6a, 6a, that is, hold the inner covering member 5 and the outer covering member 6 at a predetermined interval. I have. Further, after the holding member 7 is inserted into the engaged holes 5h and 6h, the male screw 7 of the holding member 7 is
Nuts 10 and 10 are screwed into the a and 7a, and the nuts 10 and 10 prevent the holding member 7 from being detached from the inner covering member constituting body 5a and the outer covering member constituting body 6a.

Next, a procedure for constructing the tank 1 having the above-described configuration and shown in the first embodiment will be described. First, the bottom plate 2 is cast. At this time, the tension members 11, 11 made of a sheath and a PC steel material for the height direction are set up so that the lower end is embedded in the bottom plate 2 and the upper end reaches near the upper end of the tank 1. Then, after the bottom plate 2 is cured, the first-stage inner covering member structure 5 is placed on the bottom plate 2.
a and 5a are assembled over the entire circumference. Next, the second-stage inner covering member structures 5a and 5a are assembled over the first-stage inner covering member structures 5a and 5a over the entire circumference.
In this way, the inner covering member structures 5a, 5a are erected from the first stage to the last stage, and the inner covering member 5 is completed. Then, or before that, the tension members 12, 12 made of a sheath and a PC steel material for the circumferential direction.
Are all arranged. Then, on the bottom plate 2, the first-stage outer covering member structures 6a, 6a are assembled over the entire circumference, and further, the outer covering member structures 6a, 6a, and the outer covering member structures 6a, 6a, The holding members 7, 7 are assembled so as to bridge the inner covering member structures 5a, 5a opposed to 6a. Then, the first-stage inner covering member structures 5a and 5a and the first-stage outer covering member structures 6a and 6
A fresh concrete is cast between a. Then, without waiting for the ready-mixed concrete to harden, the second-stage outer covering member structures 6a, 6a are similarly placed on the first-stage outer covering member structures 6a, 6a via the packing 9. 6a and the holding members 7, 7 are assembled, and ready-mixed concrete is cast between the second-stage inner covering member structures 5a, 5a and the second-stage outer covering member structures 6a, 6a. In this manner, one stage of the outer covering member structure 6a, 6a
Then, the assembling of the holding members 7 and 7 and the placing of the ready-mixed concrete are alternately performed, and the first stage to the final stage are started at a stretch. Thus, the outer covering member structures 6a, 6a
All are assembled and the outer covering member 6 is completed, and all the ready-mixed concrete is poured. And, after the hardening of the ready-mixed concrete, the PC steel materials of the tension members 11, 11, 12, and 12 for the height direction and the circumferential direction are tensioned,
Introduce prestress into hardened concrete. Thus, the side wall main body 4 made of prestressed concrete is completed. Further, the upper surface of the side wall body 4 is covered with a mortar 13, and the mortar 13 is covered with a cap 14 having a U-shaped cross section, and the construction of the side wall 3 of the tank 1 is completed.

Next, the operation and effect of the tank 1 according to the first embodiment will be described. This tank 1 has a side wall body 4 whose side wall 3 is made of prestressed concrete.
And an inner covering member 5 made of stainless steel covering the inner side surface 4a of the side wall body 4 and an outer covering member 6 made of stainless steel covering the outer side surface 4b of the side wall body 4. Therefore, in the side wall 3, the main body 4 of the side wall made of prestressed concrete mainly receives the pressure of the contents such as the liquid put in the tank 1. And the side wall body 4
Is covered with an inner covering member 5 made of stainless steel, and this inner covering member 5 comes into contact with a liquid or the like to be put into the tank 1. Furthermore, the outer side surface 4b of the side wall main body 4 is covered with an outer covering member 6 made of stainless steel, and the prestressed concrete of the side wall main body 4 does not become exposed to the outside, so that the appearance is excellent. Thus, the side wall 3
By using prestressed concrete having a high tensile force in addition to stainless steel as the material, the amount of stainless steel used can be reduced, and as a result, costs can be reduced while using stainless steel. Further, since the side wall body 4 made of prestressed concrete is covered with the inner covering member 5 and the outer covering member 6 made of stainless steel, it is not necessary to perform waterproof treatment on the inner side surface 4a and the outer side surface 4b of the side wall body 4. When the inner side surface 4a of the side wall main body 4 is covered with the inner covering member 5, the side wall main body 4 made of prestressed concrete does not come into contact with the liquid or the like put in the tank 1. Is not eroded. When the liquid or the like to be put into the tank 1 is clean water, the clean water is included in the clean water.
The chlorine content for the sterilization is not absorbed by the concrete of the side wall main body 4, so that the chlorine content can be prevented from lowering.
As described above, the inner side surface 4a of the side wall main body 4 is
By covering the tank 1, the tank 1 can be suitably used as a storage tank for storing tap water and other liquids. Further, the inner covering member 5 and the outer covering member 6 also serve as an inner mold and an outer mold when the side wall main body 4 is molded, and after the side wall main body 4 is formed, the inner mold and the outer mold are removed. There is no need, and the construction of this tank 1 is facilitated.

The ribs 5c, 5d of the inner covering member structures 5a, 5a and the ribs 6c, 6d of the outer covering member structures 6a, 6a form the inner covering member structures 5a, 5a and the outer covering member structures 6a, 6a. The strength of the side wall body 4 can be ensured without increasing the thickness of the inner cover member 6a. When the side wall main body 4 is formed, the inner cover member structures 5a, 5a and the outer cover member structures 6a, 6a are cast. Can easily withstand the pressure of concrete. In addition, since the ribs 5c, 5d, 6c, and 6d protrude toward the side wall main body 4, these ribs 5c, 5d, 6c, and 6d do not appear on the front surface of the side wall 3.

The engagement holes 5h, 5h of the inner covering member structures 5a, 5a and the outer covering member structures 6a, 6a
When the side wall main body 4 is formed by the holding members 7, 7 which are engaged with the engaged holes 6h, 6h, the inner cover member constituting bodies 5a, 5a forming the inner form and the outer form are formed. The outer covering member structures 6a, 6a are held at predetermined intervals. In this way, it is possible to eliminate the need for a form staying material and other fasteners provided outside the form, which are necessary for a form that is to be removed after curing. It's even easier. further,
After the side wall main body 4 is cured by the holding members 7, 7, the inner coating member structures 5a, 5a and the outer coating member structures 6a,
6a is prevented from peeling off from the side wall main body 4. Also,
The engaged hole 5h of the inner covering member structure 5a is
c, the engaged hole 5h is easily provided in the inner covering member structure 5a. Similarly, by providing the engaged hole 6h of the outer covering member structure 6a in the horizontal rib 6c, the engaged hole 6h is
a is easily provided.

In constructing the tank 1, all the inner covering member structures 5a, 5a forming the inner formwork are assembled, and thereafter, the outer covering member structures 6a, 6a forming the outer formwork are assembled. By repeating the assembling and the placing of the concrete in units of one step, the placing of the concrete to be the side wall main body 4 can be performed at a stretch.

Note that the present invention is not limited to the above-described embodiment, and various other modifications are possible. For example, this tank may be used not only as a reservoir for drinking water but also as a tank for sewage and a tank for storing various liquids, gases and solids.
The circumferential assembly of the inner covering member structures 5a and 5a and the outer covering member structures 6a and 6a may be performed directly without welding using the bolts 8. Similarly, the assembling of the inner covering member structures 5a and 5a and the outer covering member structures 6a and 6a in the height direction may be directly welded without using the packing 9.

As shown in FIGS. 5 and 6, the holding member 7 has one side 7b and the other side 7c which are bent.
Are formed in a tapered shape, and the engagement hole 5
h, 6h are the inner and outer covering member structures 5a, 6a
Piece 1 welded to the inside of vertical ribs 5d, 6d of
The holding member 7 may be formed in a tapered shape having a smaller diameter toward the lower side, where the one side 7b and the other side 7c of the holding member 7 just fit. Further, as shown in FIGS. 7 and 8, the holding member 7 has one side 7b.
And a flat plate having engagement holes 18 and 19 formed in the other side 7c.
In the inner horizontal ribs 5c, 6c of 6a, engaged holes 5h, 6
Instead of h, an engaged projection 20 as a first engaged portion and an engaged projection 21 as a second engaged portion, which project upward and are fitted with the engagement holes 18 and 19, are provided. It may be formed. Thus, the mounting structure of the holding member 7 can be variously changed.

FIGS. 9 to 11 show a second embodiment of the present invention. Each of the inner and outer covering members 5 and 6 shown in the second embodiment is shown in FIGS. The inner covering member constituting body 5a and the outer covering member constituting body 6a have their main bodies, that is, the inner covering member constituting body 5b and the outer covering member constituting body 6b are formed of a convex body with a flange W (in the illustrated embodiment). Is a convex body protruding leftward in FIG. 11, but may be a convex body protruding rightward in the opposite direction.) Formed plate. Thus, the inner covering member constituting body 5b
By pressing the outer cover member structure main body 6b into a convex body with a flange W, the strength thereof can be improved. In the second embodiment, the horizontal ribs 5C, 6C of the outer ribs (ribs provided at both ends in the vertical and horizontal directions of the inner covering member structure 5a and the outer covering member structure 6a, that is, both ends in the circumferential direction). Also, the vertical ribs 5d and 6d also show a form in which the outer ribs are formed separately from the inner covering member body 5b and the outer covering member body 6b by pressing. The inner covering member constituting body 5b and the outer covering member constituting body 6 each comprising a convex body provided with
It may be fixed by welding to b.

The inner covering member constituting body 5a and the outer covering member constituting body 6a are formed, for example, by forming the convex portions of the inner covering member constituting body 5b and the outer covering member constituting body 6b into the side wall body 4 side. The holding member 7 is assembled between the two covering member structures 5a, 6a via the vertical ribs 5d, 6d of the outer ribs so as to protrude to the opposite side to the opposite side. It is bridged and fixed by screws or the like (see FIG. 9).

Further, it can be used as a storage tank.
When the tank 1 is constructed, the concrete is poured into the side wall 3 by the inner and outer covering member structures 5a,
The steps 5a, 6a, and 6a are performed for each step, but may be performed for every two steps or every three steps within the range of one possible driving height.

In the first and second embodiments described in detail above, examples in which the entirety of the inner side surface 4a and the outer side surface 4b of the side wall main body 4 are covered with the stainless steel covering members 5 and 6 will be described. However, it may cover only a part of the side wall main body 4, for example, only the inner side surface 4a or the outer side surface 4b, or may cover a part of the inner side surface 4a or the outer side surface 4b. Here, as a third embodiment of the present invention, only the outer surface 28a of the side wall body 28 of the tank 25 is covered with the outer covering member 29,
A description will be given based on FIGS.

The tank 25, which can be used as a storage tank, comprises a concrete bottom plate 26 and side walls 27, as in the first embodiment. Further, the side wall 27 includes a cylindrical side wall main body 28 made of prestressed concrete and an outer covering member 29 made of stainless steel and covering an outer side surface 28 a of the side wall main body 28.
The outer covering member 29 is formed of an outer formwork when the side wall main body 28 is formed. That is, the outer mold is not removed after the molding of the side wall body 28 without being removed.
8 and become the outer covering member 29.

The outer covering member 29 is composed of a plurality of outer molds, that is, outer covering member structures 29a, 29a, which are divided and arranged in the circumferential direction and the height direction.
Further, the outer covering member constituting body 29a is
The outer cover member main body 29b, which covers the outer surface 28a of the base member 8, and protrudes from both circumferential ends of the outer cover member main body 29b toward the side wall main body 28 in the height direction. , And vertical ribs 29c, 29c (see FIGS. 15 and 16). As shown in FIGS. 13 and 16, the outer cover member structure main body 29 b projects so as to be bent to the opposite side to the side wall main body 28 side (in the illustrated embodiment, the side cover main body side and the side wall main body side). Is bent in a U-shaped cross section so as to become narrower toward the opposite side.) A projection 29d is provided. The projecting portion 29d is provided on the outer covering member structure main body 29.
b protrudes from the circumferential end portions (almost in the illustrated embodiment) so as to run in the height direction. In addition, a lower end portion of the outer covering member structure 29a, which is one side of a seam portion connecting the other outer covering member structures 29a in the height direction, has an engaging projection projecting downward and extending in the circumferential direction. 29e are provided. The outer covering member structure 29a is stacked in the height direction on the upper end, which is the other side of the joint portion connecting the other outer covering member structures 29a in the height direction, of the outer covering member structure 29a. When the engagement protrusion 2 of the upper outer covering member structure 29a is
A circumferentially extending engaging recess 29f is provided for engaging with 9e (see FIG. 14). In addition, these engaging projections 29
e and the engagement recess 29f are formed on the outer covering member structure 29a.
In addition, it is formed so as to be able to bend about the height direction as an axis (in the illustrated embodiment, the engagement protrusion 29e
And the engaging concave portion 29f are provided with a plate material P and a plate material P1, each having a thickness that can be bent together with the outer covering member structure 29a,
P1 is formed by bonding). Therefore, when the outer covering member structure 29a is curved around the height direction as an axis,
The engaging projections 29e and the engaging recesses 29f, and the vertical ribs 29c and the projecting portions 29d do not prevent the outer covering member structure 29a from being curved.

Then, these outer covering member constituting bodies 29
In the circumferential direction, the vertical ribs 29c, 29c of the adjacent outer covering member structures 29a, 29a are overlapped with each other, and the vertical ribs 29c, 29c are bolted to each other.
It is assembled by being connected by 0 and 30. Further, these outer covering member structures 29a, 29a
Are, in the height direction, outer covering member structures 29a adjacent to each other,
The engaging projection 29e of the upper outer covering member structure 29a is fitted into the engaging concave portion 29f of the lower outer covering member structure 29a of the lower outer covering member 29a, and is stacked. At this time, the engaging convex portion 29e and the engaging concave portion 29f are firmly joined by joining with an adhesive or the like, and a seam portion connecting the outer covering member constituting bodies 29a, 29a in the height direction. The adhesion of is increased.

The outer covering member 2 of the tank 25
A heat insulating material 31 such as urethane foam is provided between the side wall 9 and the side wall body 28. The heat insulating material 31 is formed to have substantially the same size as the outer covering member main body 29b, and is attached to the inner side surface 29g of the outer covering member main body 29b after or before assembling.
Thus, the outer surface 28a of the side wall main body 28 is
Will be covered by

Next, the procedure for constructing the tank 25 according to the third embodiment having the above-described configuration will be described, mainly focusing only on the differences from the first embodiment. On the bottom plate 26, the first-stage outer covering member structure 29a is assembled over the entire circumference. Next, the second-stage outer covering member structure 29a is inserted into the engagement recess 29f of the first-stage outer covering member structure 29a.
Then, the second-stage outer covering member constituting body 29a is assembled over the entire periphery of the first-stage outer covering member constituting body 29a so as to fit the engaging projection 29e. In this way, the outer covering member constituting body 29a is erected from the first stage to the last stage, and the outer covering member 29 as an outer mold for forming the side wall main body 28 of the tank 25 is completed. Then, the heat insulating material 31 is attached to the inner surface 29g of each outer covering member main body 29b after or before assembling.

The inner mold 32 for molding the side wall body 28 of the tank 25 is a mold that can be removed after curing. The inner mold 32 has a plurality of inner molds that are divided in the circumferential direction and the height direction. It is composed of formwork components 32a, 32a (see FIGS. 17 and 18). Then, the first-stage inner form forming member 32a is assembled on the bottom plate 26 over the entire circumference. Further, a fastening member 3 such as a tie rod type fastening member is attached to the inner form member 32a and the outer covering member member 29a opposed to the inner form member 32a.
3 (indicated by a dashed line in FIG. 17). Then, using the fastening hardware 33,
A first-stage inner form stay member 34 disposed on a side of the first-stage inner form member 32a opposite to the side wall main body 28;
A first-stage outer mold stay member 35 disposed on the side of the outer mold-covering member forming body 29a on the side opposite to the side wall main body 28 is fixed. Next, the second-stage inner form member 32a is assembled over the entire periphery of the first-stage inner form member 32a.
Then, the fastening member 33 is attached to the outer covering member constituting body 29a facing the inner form forming body 32a. Then, while the second-stage inner form staying material 34 is placed on the first-stage inner form stay material 34 and placed, the first-stage outer form stay material 35 is
The second-stage outer form stays 35 and the second-stage outer form stays 35 are mounted on the second-stage outer form stays 35 by using the fastening hardware 33. Fix it. When the second-stage inner form stay 34 is placed on the first-stage inner form stay 34, as shown in FIG. 17, the first-stage inner form stay 34 is provided. Lumber 3
4, an insertion port 34a is provided at an upper portion, and a lower portion of the second-stage inner form stay 34 is provided with an insertion portion 34b to be inserted into the insertion port 34a. The insertion section 34b of the second-stage inner form stay 34 may be inserted into the insertion port 34a. As a result, the inner form staying material 34 is temporarily fixed, so that when the inner form material staying material 34 is permanently fixed with the fastening hardware 33, the final fixing can be easily performed. In this way, the inner form member 32a is erected from the first stage to the last stage, and the inner form stays 34 are stacked from the first stage to the last stage. Thereafter, the outer covering member construct 29
At a predetermined position in the height direction a, the flap 36 is disposed, and the inner mold 32 is completed.

Then, a ready-mixed concrete is poured between the outer covering member constituting body 29a and the inner formwork constituting body 32a,
After the hardening of the ready-mixed concrete, the flap 36, the inner form stay 34, the outer form stay 35, and the inner form forming member 32a are all removed. Thus, the construction of the side wall 27 of the tank 25 is completed.

Next, the operation and effect of the tank 25 shown in the third embodiment will be described. Of this tank 25,
Outer covering member constituting body 29a constituting outer covering member 29
Is a vertical rib 29c of the outer covering member structure 29a,
With the protruding portion 29d, the strength can be ensured without increasing the thickness of the outer covering member constituting body 29a. Further, since the outer covering member constituting body 29a is curved around the height direction as an axis, it can be suitably used as an outer mold for forming the cylindrical side wall 27. Further, each outer covering member structure 29a is provided with an engaging recess 29f of the lower outer covering member structure 29a in the height direction.
The engaging projection 29e of the upper outer covering member structure 29a
When the side wall body 28 is formed, the cement paste in the poured ready-mixed concrete is removed from the seam portion connecting the outer covering member structures 29a in the height direction. It is hard to flow to. Therefore, the outer surface 29h of the outer covering member structure 29a is less likely to be soiled. In addition, these engagement convex part 29e and engagement concave part 29
f may be provided on one side and the other side of the joint portion connecting the outer covering member structures 29a adjacent in the circumferential direction.

Further, the heat insulating material 31 provided between the outer covering member 29 and the side wall main body 28 reduces the temperature change of the liquid or the like stored in the tank 25. Moreover,
Even when the temperature of the liquid or the like is low and the temperature of the outside air is high, the heat insulating material 31 makes it difficult for the surface of the outer covering member 29 to form dew.

When the outer covering member structure 29a extends due to thermal expansion, the protrusion 29d of the outer covering member structure 29a absorbs the elongation of the outer covering member structure 29a due to thermal expansion. Moreover, the outer covering member constituting body 29a
Are formed on the surface of the outer covering member constituting body 29a,
That is, the surface of the side wall 27 is changed in unevenness, so that distortion or the like appearing on the surface of the side wall 27 is hardly noticeable.
Further, the protruding portion 29d is provided on the outer covering member structure 29a.
If the shape is such that it does not prevent it from being able to bend around the height direction, it may not be a shape protruded by being bent in a U-shape in cross section, and may have other shapes, for example, an arc shape in cross section It may be a shape that is pressed to be curved and protrudes.

In the first to third embodiments, the shape of the side walls 3, 27 is not limited to a cylindrical shape, and may be, for example, a square cylindrical shape.

[0043]

As apparent from the above, the tank according to the present invention has the following effects.

According to the tank of the first aspect, by using prestressed concrete in addition to stainless steel as the material of the side wall, the amount of stainless steel used can be reduced. While using, the cost can be suppressed. Further, the covering member also serves as a formwork for molding the side wall main body, thereby facilitating the construction of the tank.

In addition, according to the tank described in claim 2, in addition to the holding member embedded in the side wall main body, the holding member embedded in the side wall body needs to be removed from the type of the form after being cured. It is possible to eliminate the need for a form retaining material and other fastening hardware to be provided, which further facilitates the construction of this tank.

According to the third aspect of the present invention, in addition to the first rib and the second rib, when the side wall body is formed, the inner covering member and the outer covering member are cast. Can easily withstand the pressure of the concrete to be produced.

According to the tank described in claim 4, in addition, the first engaged portion and the second engaged portion are easily provided on the inner covering member and the outer covering member. Can be.

According to the tank described in claim 5, in addition, when the side wall main body is formed, the cement paste in the ready-mixed concrete flows out from the joint portion of the outer covering member structure. Therefore, the outer surface of the outer covering member structure is less likely to be soiled.

According to the tank described in claim 6, in addition, the strength of the covering member is improved. Moreover, since the covering member is curved about the height direction as an axis, it can be suitably used for a cylindrical side wall.

Further, according to the tank described in the seventh aspect, the strength of the inner covering member constituting body is improved.

In addition, according to the tank described in claim 8, in addition to the heat insulating structure, dew condensation is hardly formed on the surface of the outer covering member.

According to the tank of the ninth aspect, in addition, the projecting portion of the outer covering member structure absorbs the elongation due to the thermal expansion of the outer covering member structure.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a tank according to the present invention;
It is a longitudinal cross-sectional view.

FIG. 2 is a detailed view of a portion A in FIG.

FIG. 3 is an enlarged sectional view taken along line BB in FIG. 2;

FIG. 4 is an enlarged sectional view taken along line CC in FIG.

FIG. 5 is a partially enlarged longitudinal sectional view showing a modification of the mounting structure of the holding member.

FIG. 6 is an enlarged sectional view taken along line DD in FIG.

FIG. 7 is a partially enlarged longitudinal sectional view showing another modification of the attachment structure of the holding member.

FIG. 8 is an enlarged sectional view taken along line EE in FIG. 7;

FIG. 9 shows a tank according to a second embodiment of the present invention;
FIG. 4 is a partially enlarged longitudinal sectional view in which a side wall main body is omitted.

FIG. 10 is a front view of an inner (outer) covering member structure used in the tank shown in FIG. 9;

11 is a sectional view taken along line FF in FIG.

FIG. 12 is a longitudinal sectional view of a third embodiment of the tank according to the present invention.

13 is an enlarged sectional view taken along line GG in FIG.

FIG. 14 is a detailed view of a portion H in FIG. 12;

FIG. 15 is a rear view of the outer covering member structure used in the tank shown in FIG. 12;

16 is a sectional view taken along line JJ in FIG.

FIG. 17 is a longitudinal sectional view showing a construction state before casting of ready-mixed concrete for constructing the tank shown in FIG. 12.

18 is a sectional view taken along line KK in FIG.

[Explanation of symbols]

 1, 25 Tank 3, 27 Side wall 4, 28 Side wall body 4a Inner surface 4b, 28a Outer surface 5 Inner covering member 5a Inner covering member structure 5b Inner covering member structure body 5c Horizontal rib (first rib) 5d Vertical rib (1st rib) 5h Engagement hole (1st engagement part) 6, 29 Outer covering member 6a, 29a Outer covering member structure 6b, 29b Outer covering member structure main body 6c Horizontal rib (2nd 6d Vertical rib (second rib) 6h Engaged hole (second engaged part) 7 Holding member 7b One side 7c Other side 20 Engaged projection (first engaged part) 21 Engagement projection (second engaged part) 29c Vertical rib (rib) 29d Projection part 29e Engagement convex part 29f Engagement concave part 31 Heat insulating material W flange

Claims (9)

[Claims] 1. A side wall comprising a side wall body made of prestressed concrete, and a stainless steel covering member covering an inner surface and / or an outer surface of the side wall body, wherein the covering member forms the side wall body. A tank characterized by being made of a formwork. 2. The method according to claim 2, wherein the covering member includes an inner covering member that covers an inner side surface of the side wall body, and an outer covering member that covers an outer side surface of the side wall body. Side engages with a first engaged portion provided on the side wall body side of the inner covering member, and the other side engages with a second engaged portion provided on the side wall body side of the outer covering member. The tank according to claim 1, further comprising a holding member that engages with the inner cover member and holds the inner cover member and the outer cover member at a predetermined interval. 3. The inner coating member is provided with first ribs protruding toward the side wall main body and running in directions intersecting with each other. Similarly, the outer coating member protrudes toward the side wall main body, The tank according to claim 2, further comprising second ribs running in directions intersecting with each other. 4. The device according to claim 3, wherein the first engaged portion is provided on the first rib, and the second engaged portion is provided on the second rib. The tank as described in. 5. The covering member comprises a plurality of covering member structures constituting the covering member, and the covering member structure has an engagement recess on one side of a joint portion connecting the covering member structures. 2. The tank according to claim 1, wherein an engagement protrusion is provided on the other side and fitted into the engagement recess. 3. 6. The covering member is provided with a rib running in a height direction, and the covering member is formed so as to be able to bend about the height direction as an axis. The tank according to 1 or 5. 7. An inner covering member for covering an inner side surface of the side wall main body as the covering member, and the inner covering member is formed of a plurality of inner covering member structures constituting the inner covering member. The tank according to claim 1, wherein the main body of the inner covering member structure is formed into a flanged convex body by press working. 8. The method according to claim 8, wherein the covering member includes an outer covering member that covers an outer surface of the side wall main body, and a heat insulating material is provided between the outer covering member and the side wall main body. The tank according to claim 1 or 6, wherein 9. The outer sheathing member comprises a plurality of outer sheathing members constituting the outer sheathing member, and the body of the outer sheathing member is bent or bent between both ends in the circumferential direction. 9. The tank according to claim 8, wherein a projection is provided to project in a direction opposite to the side wall main body so as to be curved and run in a height direction. 10.