JPH11324132A - Construction method for structure and formwork therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction method of a structure which can construct a structure such as a silo hopper efficiently and safely. SOLUTION: A plurality of PC formworks 20 formed into box shape are piled up, high nuts 35 are fitted to the formwork face side of a liner 30, and by screwing the extreme end parts of separators 43 in the high nuts 35, the PC formworks 20 and the liner 30 are set spacedly by a fixed distance, and concrete is placed therebetween to form the outer circumferential inclined wall 17 of a silo hopper 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a formwork suitable for constructing a structure having a special shape such as a silo hopper.

[0002]

2. Description of the Related Art It is well known that when constructing various concrete structures, a formwork or a precast concrete formwork is assembled into a predetermined shape and concrete is poured into the form. is there.

For example, when a bottom frame 1a of a silo hopper 1 as shown in FIG. 19 is constructed, a precast concrete formwork 2 and a formwork 3 are assembled at a predetermined interval by a separator 4, and the precast concrete formwork is formed. Concrete was cast between the mold 2 and the form 3.

[0004]

However, the above-mentioned conventional construction method and formwork for a structure have the following problems. First, when assembling the formwork 3, as shown in FIG. 20, it is necessary to arrange a number of steel pipes 5 vertically and horizontally and tighten them. However, assembling these steel pipes 5 is troublesome, and furthermore, since a scaffold is required, the disassembly and disassembly thereof is also troublesome, which hinders shortening of the construction period. In addition, due to work at heights, careful attention must be paid to safety.

[0005] In the silo hopper 1, the mold 3 is formed of stainless steel or the like, and is left as it is after construction, so that the lining covers the bottom frame 1a of the silo hopper 1. In such a case, it is necessary to fill the hole 3a formed in the mold 3 in order to allow the separator 4 to pass therethrough, which also involves a problem that it takes time and effort.

Further, the problem associated with the mold 3 as described above is not limited to the silo hopper 1, but is a problem common to ordinary molds.

On the other hand, on the inclined wall 6 on the outer peripheral portion of the silo hopper 1, the space 7 for assembling the precast concrete formwork 2 is narrow and has a height of, for example, 10 m. Assembly and disassembly are extremely time-consuming and require careful and careful consideration. In addition, since this part is inclined, construction difficulty is high, and there is a problem that it is difficult to increase work efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and provides a construction method and a formwork for a structure capable of efficiently and safely constructing a structure such as a silo hopper. As an issue.

[0009]

The invention according to claim 1 is
In the method of constructing a structure, a female screw member is integrally attached to a form surface side of a first form in advance, and one end of a separator is screwed into the female screw member of the first form, and By fixing the ends to the second form, the first form and the second form are assembled facing each other at a predetermined interval, and then the first form and the second form are The concrete structure is formed by casting concrete between the mold and the mold.

[0010] By attaching the female screw member integrally to the mold surface side of the first mold in this way, the first mold can be set by screwing the separator here. At this time, it is not necessary to make a hole for the separator in the first mold.

According to a second aspect of the present invention, there is provided the method of constructing a structure according to the first aspect, wherein the second formwork is continuous with a body surface to be formed by the second formwork. The present invention is characterized in that a precast concrete unit formwork having a predetermined three-dimensional shape, which is integrally formed with another body surface, is used.

By using the precast concrete unit formwork three-dimensionally formed in this way,
The labor required for assembling the mold can be saved.

According to a third aspect of the present invention, in the method for constructing a structure according to the second aspect, the frame is formed by stacking a plurality of the precast concrete unit forms.

The invention according to claim 4 is characterized in that the structure is a tower-shaped silo hopper.

According to a fifth aspect of the present invention, there is provided the method for constructing a structure according to any one of the first to fourth aspects, wherein the first form is left after the formation of the skeleton, and the surface of the skeleton is formed. It is characterized by a lining that covers

According to a sixth aspect of the present invention, a female screw member is integrally attached to a predetermined position of a mold surface of a mold, and one end of a separator is screwed into the female screw member when assembling the mold. It is characterized by becoming.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for constructing a structure and a formwork according to the present invention will be described below with reference to FIGS.
8 will be described.

1 to 3 show the bottom of a silo hopper to be constructed. In these figures, reference numeral 10 denotes a silo hopper (structure) having a circular shape in plan view, for example, and reference numeral 11 denotes a bottom plate of the silo hopper 10. , 12 are cylindrical walls of the silo hopper 10.

As shown in these figures, partition walls 13 extending in parallel to each other are provided on the bottom plate 11 at predetermined intervals. And on these partition walls 13, inclined walls 14 having a mountain shape in cross section and payout shelves 16, 16 provided with a housing 15 are alternately arranged.
It is provided on two partition walls 13, 13 adjacent to each other. An outer peripheral inclined wall (body) is provided between the outermost partition wall 13 and the inner wall 12 in the inner wall 12.
17 are formed. Further, below the inclined wall 14 and the outer peripheral inclined wall 17, wall beams 18 orthogonal to the partition wall 13 are provided at predetermined intervals.

In order to construct such a silo hopper 10, first, as shown in FIG. 4 and FIG.
The partition wall 13, the payout shelf 16, and the wall beam 18 are formed, and the base 12 a of the cylindrical wall 12 is formed to be substantially the same height as the partition wall 13. These bottom plate 11 and base 12 of cylindrical wall 12
Here, there is no intention to limit the construction method of the partition wall 13, the payout shelf 16, and the wall beam 18 at all, and various conventional construction methods may be used.

Subsequently, an outer peripheral inclined wall 17 is formed, which includes a precast concrete formwork (hereinafter, referred to as a "predetermined three-dimensional shape") which is formed in a predetermined box shape as shown in FIG. PC formwork "; a second formwork, precast concrete unit formwork) 20 is used.

The PC form 20 has a lower side surface (body surface) of the outer peripheral inclined wall 17 and the cylindrical wall 1 which is another body surface continuous with the lower surface.
2, a wall beam 18 is integrally formed, and four side surfaces thereof are formed by the cylindrical wall 12, the outer peripheral inclined wall 17, and the two wall beams 18 respectively.
It is formed so as to face. As shown in FIG. 4, these PC molds 20 each have a predetermined height,
The C-shaped frame 20 is stacked in a plurality of levels, for example, three levels in this case.

Further, as shown in FIG.
A plurality of separator holes 21 for passing a separator, which will be described later, are formed at predetermined positions on the respective side surfaces.

When installing these PC formwork 20,
As shown in FIG. 4 or 5, the scaffold 22 is assembled in the space between the outer peripheral inclined wall 17 and the cylindrical wall 12 to be formed. And
As shown in FIG. 8, the base 12 of the cylindrical wall 12 already formed
a, when the partition 13 and the wall beam 18 are set to the “first stage”,
The “second-stage” PC form 20 to be installed thereon is the cylindrical wall 1
The base member 12a is mounted on a bracket 23 attached to the upper end of the partition wall 13. Further, a support member 24 is provided between a portion facing the outer peripheral inclined wall 17 of the PC form 20 and a portion facing the same. set. FIG. 9 shows the PC molds 20 of the “second stage”. These PC molds 20A ₂ , 20B ₂ , 20C ₂ , 20D ₂ , and 20E ₂ are:
In FIG. 3, symbols (a), (b), (c),
It is installed at the positions shown in (d) and (e).

Next, as shown in FIG.
Is placed on the “second-stage” PC formwork 20. At this time, the support member 25 is set between a portion of the PC form 20 facing the outer peripheral inclined wall 17 and a portion facing the outer peripheral inclined wall 17. The one shown in FIG.
The “third-stage” PC form 20A ₃ , which is installed at the positions indicated by reference numerals (a), (b), (c), (d), and (e),
20B ₃ , 20C ₃ , 20D ₃ , and 20E ₃ .

Further, as shown in FIG.
Is placed on the “third-stage” PC formwork 20. At this time, the support member 26 is set between a portion facing the outer peripheral inclined wall 17 of the PC form 20 and a portion facing the outer peripheral inclined wall 17. The one shown in FIG.
The “fourth-stage” PC forms 20C ₄ , 20D ₄ , and 20E ₄ installed at the positions indicated by reference numerals (c), (d) and (e) in the middle
It is.

In this way, as shown in FIG. 5, while the PC formwork 20 for forming the outer peripheral inclined wall 17 and the corresponding portions of the cylindrical wall 12 and the wall beam 18 are stacked and installed, as shown in FIG. A liner (first mold, mold) 30 is set facing the PC mold 20 as follows.

As shown in FIG. 14, a liner 30 is formed by attaching a stainless plate 32 forming a mold surface to one surface of angle members 31, 31,... A high nut (female screw member) 35 and a stud dowel 36
Are provided integrally.

In order to set such a liner 30, as shown in FIG. 5, the liner 30 is suspended by a crane or the like. At this time, as shown in FIG. 15, the hanging bracket 37 is screwed into the plurality of high nuts 35 of the liner 30. Then, as shown in FIG. 16, the hanging wires 38 are locked to the respective hanging fittings 37, and a part of the hanging wires 38 is provided with a lever block 39 and the like, and the lengths thereof are made different from each other, so that the liner is formed. 30 is suspended in an inclined state according to the angle to be set.

On the other hand, as shown in FIG.
At the position where is to be set, a reinforcing bar 40 constituting the outer peripheral inclined wall 17 is assembled, and a support bracket 41 for positioning the liner 30 is attached to the reinforcing bar 40. The support fitting 41 includes a steel rod 41 integrally attached to the reinforcing bar 40.
Plates 41b and 41c are provided at both ends of a, and one plate 41c is screwed to a screw portion formed at the end of the steel rod 41a, and its position can be adjusted. And this support metal fitting 41 is a plate 41
In a state where b is pressed against the PC form 20, the suspended liner 30 is brought into contact with the plate 41c adjusted to a predetermined position to position the liner.

In this state, the separator 4 is inserted into each separator hole 21 formed in the PC form 20 as shown in FIG.
3 and screwed into the high nut 35 attached to the liner 30 at the distal end, and then attaches and fixes a washer / nut 44 to the proximal end side. As a result, the PC form 20 and the liner 30 are set at a predetermined interval by the separator 43.

In this way, the plurality of liners 30 are sequentially set at the position where the outer peripheral inclined wall 17 is to be formed,
Adjacent liners 30 are welded together.

In parallel with the installation of the liner 30, the cylinder wall 1
At a position where 2 is to be formed, a reinforcing bar is assembled, and a cylindrical wall form (not shown) is assembled facing the PC form 20.

Thereafter, concrete is struck between the PC form 20 and the liner 30, between the PC form 20 and the cylindrical form (not shown), and between the adjacent PC forms 20 and 20. The outer peripheral inclined wall 17, the cylindrical wall 12, and the wall beam 18 are formed by being hardened.

Further, as shown in FIG.
Is formed at the position where the PC mold 45 is formed in a predetermined shape in order to form the lower surface side of each inclined wall 14.
Is set. Then, a reinforcing bar (not shown) is assembled, and the separator 43 (FIG.
The inclined wall 14 is formed by installing the liner 30 using the above-described method and casting concrete from the top between the liner 30 and the PC form 45.

Further, the lower part of the housing 15 is P
It is formed by forming a C-shaped frame 50, setting the liner 30 on the upper part in the same manner, and pouring concrete in the meantime.

As a result, the bottom frame of the silo hopper 10 is constructed. Thereafter, the cylindrical wall 12 is formed to extend upward by various methods, and further, a roof (not shown) or the like is formed. , Silo hopper 10
Is constructed.

As described above, in the method of installing the bottom of the silo hopper 10 and the liner 30, the high nut 35 is attached to the formwork side of the liner 30, and the tip of the separator 43 is screwed into the high nut 35. ,
The PC form 20 and the liner 30 were set at a predetermined interval, and concrete was poured between them to form the inclined outer peripheral wall 17 of the silo hopper 10. Further, the inclined wall 14 and the housing 15 are formed using the same liner 30. By using the liner 30 provided with such a high nut 35 on the side of the formwork, it is not necessary to use a large number of steel pipes as in the case of the conventional formwork in order to set the liner 30. In addition to the labor required, assembly and disassembly of the scaffold for assembling the steel pipe is not required. As a result, the construction efficiency can be greatly improved, and the silo hopper 1
0 can shorten the construction period. In addition, since work at high places can be reduced, safety can be improved.

The liner 30 is provided on the outer peripheral inclined wall 1.
After the formation of 7, the liner 30 is left as it is to form a lining covering the bottom of the silo hopper 10. However, since this liner 30 can be set only by screwing the separator 43, it is necessary to make a hole for the separator. There is no. Therefore, if such a liner 30 is used as a lining, it is not necessary to fill a hole as in the related art, and it is possible to save labor of construction and to finish the lining neatly.

Further, since the PC form 20 formed in a box shape is used, and a plurality of PC forms 20 are stacked on the outer peripheral inclined wall 17 having a high height, a plate form as in the prior art is used. The labor required for assembling can be greatly reduced as compared with the assembling, and the efficiency of construction can also be improved. Further, the outer peripheral inclined wall 17, which has conventionally been a place where the construction difficulty is high because of the inclined surface, can be easily constructed by the PC form 20.
Moreover, even in a narrow space between the outer peripheral inclined wall 17 and the cylindrical wall 12, the installation can be easily performed by using the PC formwork 20. In this manner, the use of the box-shaped PC form 20 can also improve the efficiency of the work of installing the silo hopper 10 and improve the safety.

In the above embodiment, the construction method and the formwork according to the present invention are applied to, for example, the silo hopper 10. However, it is needless to say that the present invention is similarly applied to other structures. Can be.

In the above embodiment, the liner 3
Although 0 is used for the inclined wall 14, the housing 15, and the outer peripheral inclined wall 17, it goes without saying that a vertical plane or a horizontal plane other than the inclined plane can be similarly used. Further, the liner 30 is used as a lining, but is not limited to this.
In addition, as for the material of the liner 30, in the above-described embodiment, stainless steel is used for the lining, and there is no intention to limit the material, and other materials may be appropriately used. If a precast concrete material is used as the first formwork, it is also possible to adopt a configuration in which a female screw member is provided integrally therewith.

Regarding the shape of the PC form 20, any other shape may be employed as appropriate in accordance with the shape of the frame to be formed.

In the above embodiment, the liner 30
And the PC frames 20, 45, and 50, but the PC frames 20, 45, and 50 may be replaced with other frame materials.

In addition, the order of execution in the above embodiment is not limited at all, and a plurality of operations may be performed in parallel in order to improve the efficiency of execution. The order may be appropriately changed.

Other than this, any configuration may be adopted as long as it does not deviate from the gist of the present invention, and it is needless to say that the above-described configurations may be appropriately selectively combined. No.

[0047]

As described above, claims 1 and 4
According to the construction method of the structure according to, in advance, a female screw member is integrally attached to the formwork surface side of the first formwork, and a first formwork set by screwing one end of the separator into the female screw member. By casting concrete between the second mold and the second formwork, a structure of a structure such as a silo hopper is formed. By attaching the female screw member integrally to the mold surface side of the first mold in this way, the first mold can be set by screwing the separator here. Therefore, it is not necessary to use a large number of steel pipes for assembling the formwork as in the conventional case, and not only the labor required for the assembling but also the disassembly and disassembly of the scaffold for assembling the steel pipes are not required, and the construction efficiency is greatly improved. As a result, it is possible to shorten the construction period when constructing a structure such as a silo hopper. In addition, since work at high places can be reduced, safety can be improved.

According to the construction method of the present invention, a precast concrete unit form having a three-dimensional shape is used as the second form. This can save time and labor required for assembling the formwork, and can easily install the formwork even in a narrow space. In addition, even in a place where the construction difficulty is high, such as an inclined surface, the construction can be easily performed by previously uniting this part. Therefore,
This also makes it possible to improve work efficiency and safety.

According to the method of constructing a structure according to the third aspect, the frame is formed by stacking a plurality of precast concrete unit forms. Thus, the effect according to claim 2 can be obtained even in a high portion.

According to the construction method of the fifth aspect, the first formwork is left after the formation of the skeleton, and the lining covers the surface of the skeleton. The first formwork is
The separator can be set only by screwing in the separator, and there is no need to make a hole for the separator in the first mold. Therefore, when such a first formwork is used as a lining, it is not necessary to fill a hole as in the related art, so that it is possible to save labor of construction and to finish the lining neatly.

According to the sixth aspect of the present invention, a female screw member into which one end of the separator is screwed is integrally attached to a predetermined position of the mold surface of the mold. By using such a formwork, the method for constructing a structure according to claim 1 can be realized, the formwork can be efficiently assembled, and it is not necessary to form a hole for a separator. When the formwork is used as the lining, the labor for construction can be saved.

[Brief description of the drawings]

FIG. 1 is an elevational sectional view showing an example of a structure to which a method for constructing a structure and a formwork according to the present invention are applied.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a view showing a construction method of the structure, and is an elevational sectional view showing a state where a second formwork is set.

FIG. 5 is an elevational sectional view showing a state where the first mold is set;

FIG. 6 is a perspective view showing the mold (first mold).

FIG. 7 is a side view of the same formwork.

FIG. 8 is an elevational view showing a state where the same formwork is set.

FIG. 9 is a perspective view showing a variation of the same formwork.

FIG. 10 is an elevation view showing a state following FIG. 8;

FIG. 11 is a perspective view showing a variation of the formwork installed in FIG.

FIG. 12 is an elevation view showing a state following FIG. 10;

FIG. 13 is a perspective view showing a variation of the formwork installed in FIG.

FIG. 14 is an elevational view of the first formwork viewed from the formwork surface side.

FIG. 15 is a side cross-sectional view showing a state in which a hanging fitting is attached to a female screw member provided in the first mold.

FIG. 16 is a perspective view showing a state where the first mold is lifted using the hanging metal fitting.

FIG. 17 is an elevational sectional view showing a state before setting the first mold.

FIGS. 18A and 18B are views showing a state where the first mold is set, and FIG. 18A is an elevational sectional view thereof, and FIG. 18B is an elevational sectional view showing an attachment portion between the first mold and the separator. .

FIG. 19 is a sectional elevational view showing an example of a structure to be constructed by applying a conventional construction method and a formwork.

FIG. 20 is a side view and a vertical sectional view showing a fixing structure of the formwork.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Silo hopper (structure) 17 Peripheral inclined wall (body) 20 Precast concrete formwork (second formwork, precast concrete unit formwork) 30 Liner (first formwork, formwork) 35 High nut (female screw member) ) 43 Separator

Claims (6)

[Claims] 1. A method of constructing a structure, wherein a female screw member is integrally attached to a mold surface side of a first mold in advance, and one end of a separator is attached to the female screw member of the first mold. And by fixing the other end to the second formwork, assembling the first formwork and the second formwork so as to face each other at a predetermined interval, and thereafter, A construction method for a structure, comprising forming a skeleton of the structure by placing concrete between a formwork and a second formwork. 2. The method for constructing a structure according to claim 1, wherein, as the second mold, a skeleton surface to be formed by the second mold and another skeleton surface continuous with the skeleton surface are formed. A method for constructing a structure, comprising using a precast concrete unit formwork integrally formed and having a predetermined three-dimensional shape. 3. The method for constructing a structure according to claim 2, wherein the skeleton is formed by stacking a plurality of the precast concrete unit forms. 4. The method according to claim 1, wherein the structure is a silo hopper having a tower shape. 5. The method for constructing a structure according to claim 1, wherein the first formwork is left after the formation of the skeleton, and the lining covers a surface of the skeleton. Construction method of a structure characterized by the above. 6. A female screw member is integrally attached to a predetermined position of a mold surface of a mold, and one end of a separator is screwed into the female screw member when assembling the mold. And formwork.