JPH1171847A - Precast concrete, work execution method for concrete, and method for using form main body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide precast concrete such that the amount of cast-in-place concrete can be reduced. SOLUTION: Precast concrete 1 includes a recessed form main body 2, which is formed by precast concrete 1, a rectangular surface 20, and a corrugated board consisting of four upright pieces 22, 24 placed to stand from the four sides of the surface 20; and a locking means 3 by which the form main body 2 is locked to the precast concrete 1. An opening 2a in the form main body 2 is opposed to the precast concrete 1, and the form main body 2 is locked to the precast concrete 1 by the locking means 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a precast concrete, a method of applying a concrete, and a method of using a formwork body.
In particular, the present invention relates to a precast concrete having a concave form body formed of a corrugated ball capable of reducing the amount of concrete to be constructed, a method of constructing the concrete and a method of using the form body. .

[0002]

2. Description of the Related Art A hollow member having a hollow inside is installed on a precast concrete pre-manufactured in a factory or the like, or on-site when a concrete is constructed on site, and the capacity of the hollow member is set. It is conceivable to reduce the amount of concrete to be constructed.

[0003]

However, in reality, there is a problem of how to fix the above-mentioned hollow member and what kind of member is used to form the hollow member.

[0004] It is an object of the present invention to provide a precast concrete, a method of applying the concrete, and a method of using the formwork body, which eliminate the above problems.

[0005]

In order to achieve the above object, a precast concrete according to a first aspect of the present invention comprises a precast concrete, a rectangular-shaped surface, and four squares which are respectively erected from four sides of the surface. And a fixing means for fixing the form body to the precast concrete, wherein the form body is formed by a stepped ball composed of two standing pieces, and an opening of the form body is formed by the fixing means. The mold body is fixed to the precast concrete by the fixing means while facing the precast concrete.

According to a second aspect of the present invention, there is provided the precast concrete according to the first aspect, wherein all of the four standing pieces are folded back, and the folded portions are in contact with the precast concrete. Is what it is.

A precast concrete according to a third aspect of the present invention is the precast concrete according to the first aspect, wherein the cross-section of the preform concrete is circular or polygonal and formed of plastic. A plurality of auxiliary supporting members.

According to a fourth aspect of the present invention, there is provided a concrete forming method comprising a stepped ball formed of a rectangular surface and four standing pieces standing upright from four sides of the surface. And a plurality of upper main bars and a plurality of lower main bars installed at a construction site, and the upper main bar. And the stepped ball form is held between the lower end main bar and the concrete, and then the concrete is poured into the construction site to bury the stepped ball form.

According to a fifth aspect of the present invention, there is provided a method of constructing a concrete according to the fourth aspect, wherein the corrugated board form is interposed with a spacer so that an upper main bar and a lower main bar are provided. And the stepped ball form is held between them.

According to a sixth aspect of the present invention, in the method of using the formwork body, a concave shape formed by a stepped ball comprising a rectangular surface and four standing pieces respectively erected from four sides of the surface. In the method of constructing a concrete in which the opening of the form body is made to face the precast concrete and the concrete is hit on site, the opening of the form body is used. A lid is added to form a corrugated ball formwork, and the formwork body is made concrete with the precast concrete.
It is commonly used in the concrete construction method of hitting the work site.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Precast concrete according to one embodiment of the present invention
The method of installing the concrete and concrete and the method of using the formwork body will be described with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a concrete pre-manufactured in a factory or the like, a so-called precast concrete, and a recess formed by a step ball on the precast concrete 1. The form body 2 having the shape is located, and the form body 2 is fixed to the precast concrete 1 by the fixing means 3.

The form body 2 has a rectangular surface 20 and this surface 20.
Four standing pieces 21, 22, 2 standing from four sides of 20, respectively
The four standing pieces 21, 22, 23, 24 are all folded back, and the folded portions 21 a, 22 a, 23 a, 24 a are in contact with the precast concrete 1.

Then, as shown in FIG. 1, the opening 2a of the mold body 2 faces the precast concrete 1, and the mold body 2 is fixed to the precast concrete 1 by the fixing means 3. The fixing means 3 is formed of, for example, hard plastic, paper, or the like, and one of the fixing means (fixing member) 3 is provided in a gap S formed by folding up the standing pieces 21, 22, 23, and 24. When the precast concrete 1 is in a soft state, insert the precast concrete
It is to pierce to 1.

Therefore, the precast concrete 1 shown in FIG. 1 (the precast concrete 1 in which the formwork body 2 is fixed by the fixing means 3) is transported to the site, where the mold is formed as shown in FIG. A concrete 4 (post-concrete) is formed on the frame body 2 to form a predetermined shape.

According to this embodiment, since the opening 2a of the form body 2 faces the precast concrete 1 (PC), when the concrete 1 is constructed, the opening 2a enters the inside of the form body 2. Of concrete 4 can be prevented,
Further, since the concave form body 2 is formed by a step ball,
The cost is low, and even if the mold main body 2 remains, the processing is easier compared to foamed styrene or the like.

The fixing means (fixing member) 3 is not limited to the above-described embodiment. For example, as shown in FIG. The surface 20 of the frame main body 2 may be held below the form main body 2 by a wire 32 to fix the form main body 2 at a predetermined position. Further, as shown in FIG. Accordingly, the form body 2 may be fixed at a predetermined position by the string 34 as shown in FIG. 6 and the substantially L-shaped member 35 as shown in FIG. 7 as shown in FIG.

In the above-described embodiment, the inside of the mold main body 2 is a space and the mold main body 2 is weak in strength. However, as shown in FIGS. 8 to 13, the cross section is circular or polygonal. Thus, even if the mold main body 2 is exposed to rain, the strength can be maintained by the auxiliary support members 5 and a plurality of the auxiliary support members 5 formed of plastic are embedded therein. Water may be evaporated by solar heat or the like and gradually discharged from the mold body 2 formed of the step ball to prevent the strength of the mold body 2 made of the step ball from being reduced by water. .

FIGS. 8 to 13 show the auxiliary support member 5 having a cross-girder shape. The horizontal cross section of the auxiliary support member 5 has a square shape. When fixing the form body 2 to the precast concrete 1, a member 36 shown in FIG. 11 is used.
The auxiliary support member 5 and the member 36 are integrated by an adhesive, a stapler, or the like, and the auxiliary support member 5 and the mold body 2 are integrated by an adhesive or the like.

FIG. 12 shows the auxiliary support member 5 having a hexagonal cross section, and FIG. 13 shows the mold body 2 having the auxiliary support member 5 having a circular cross section. Is shown.

In particular, as shown in FIG. 14A, when a part of the surface 20 is broken, a plurality of auxiliary support members 5 having a circular or polygonal cross section and made of plastic are provided. In this case, as shown in FIGS. 14B and 14C, unnecessary foaming agent is not required, and the amount of the foaming agent H can be reduced.

Further, as shown in FIG. 15, a top plate slightly smaller than the surface 20 of the form body 2 is provided between the form body 2 and the auxiliary support member 5, as shown in FIG. 7 should be provided. In particular, as shown in FIG. 16A, when the surface 20 and a part of the top plate 7 are damaged, the auxiliary support member 5 having a circular or polygonal cross section and formed of plastic is used.
When a plurality of are present, as shown in FIGS. 16 (b) and 16 (c), unnecessary foaming agent is unnecessary and the amount of the foaming agent H can be reduced.

The above-described embodiment is an example in which the form body 2 is applied to the precast concrete 1. The method of applying the concrete to hit the concrete on site does not include a concave. Concrete inside of form body 2 of shape
Not applicable because of intrusion.

That is, as shown in FIG. 17, a lid F for closing the opening 2a of the mold body 2 is formed to prevent the concrete from entering the interior of the mold body 2 having a concave shape.

The corrugated ball form D is composed of a rectangular surface 20 formed by corrugated balls and four standing pieces 21, 22, 23, 24 erected from four sides of the surface 20. Formwork body 2,
A lid F for closing the opening 2a of the form body 2 is provided. Then, a lid F for closing the opening 2a of the form body 2
The opening 2a may be closed from the outside as shown in FIG. 18, or the opening 2a may be closed from the inside as shown in FIG.

The corrugated ball form D is held between the upper main bar 8 and the lower main bar 9. As a held form, for example, as shown in FIGS.
(Intervening material) is interposed between the upper main bar 8 and the lower main bar 9 to hold the step ball form D, and after holding the step ball form D, as shown in FIG. The concrete 4 'is poured into the construction site to bury the corrugated ball form D.

The form of the corrugated ball form D held between the upper main bar 8 and the lower main bar 9 is, for example, as shown in FIG.
As shown in FIG. 3, with reference to the vertical streak 11, fixing horizontal streaks 12 and 13 are provided vertically between the vertical streak 11 and the vertical streak 11, and this fixing horizontal streak 12
And the horizontal bar 13 for fixing may hold the step ball formwork D,
As shown in FIG. 24, a pair of X-shaped pinching jigs 14, 14 are provided between the upper main bar 8 and the lower main bar 9, based on the upper main bar 8 and the lower main bar 9. 14 and pinching jig 14
The step ball formwork D may be held between the upper main bar 8 and the lower main bar 9 with reference to the upper main bar 8 and the lower main bar 9, as shown in FIG. Holding jig with
Steps 15 and 15 may be provided, and the recessed portion of the holding jig 15 and the recessed portion of the holding jig 15 may hold the step ball formwork D. Further, as shown in FIG. And a pair of jigs 16, 16 which match the outer peripheral shape of the corrugated ball form D and whose ends are pierced into the floor form, are provided.
May be held.

As shown in FIG. 27, the step ball form D is hung by the hanging streaks T made of wire, rubber material or the like on the upper main streaks 8, and the spacer 10 (intervening object) is interposed. Thus, the corrugated ball form D may be held.

Further, as shown in FIG. 28, a spacer 10 (intervening object) is placed on the lower main bar 9, and the corrugated ball form D is fastened with a fastening member T 'made of wire, rubber material or the like. You may keep it.

[0030]

The precast concrete according to claim 1
According to the plan, since the opening of the formwork body faces the precast concrete, when constructing the concrete,
It is possible to prevent the concrete from entering the inside of the formwork body, and since the concave formwork body is formed by a stepped ball, the cost is low and even if the formwork body remains, Its processing is easier than foam styrol and the like.

According to the precast concrete according to the second aspect, in addition to the effect of the first aspect, the four upright pieces abutting on the precast concrete are formed by cutting surfaces of the step ball. In any case, since the corrugated ball is a folded back portion, the effect of sucking up moisture adhering to the precast concrete is reduced, and a reduction in strength of the corrugated ball due to water can be prevented. .

According to the precast concrete of the third aspect, in addition to the effect of the first aspect, even if the form body is exposed to rain, the strength can be maintained by the auxiliary support member. The water that has entered the main body of the form is evaporated by solar heat or the like and can be gradually discharged from the main body of the form formed by the step ball, thereby preventing the strength of the step ball from being reduced by water. be able to.

According to the concrete construction method of the fourth aspect, since the lid for closing the opening of the formwork body is formed, the concrete enters the inside of the concave formwork body. Intrusion can be prevented, and the vertical and horizontal lengths of the standing pieces can be adjusted so that the corrugated ball form can be largely arranged between the upper main bar and the lower main bar. Because of the large arrangement, it is easier to hold the step ball formwork between the upper main bar and the lower main bar.

According to the concrete construction method of claim 5, in addition to the effect of the invention of claim 4, the upper end of the corrugated ball form is formed by interposing a spacer (intervening material). The step ball formwork can be easily held between the main reinforcing bar and the lower main reinforcing bar.

According to the method of using the form body of the sixth aspect, the concave form body composed of the rectangular surface and the four upright pieces erected from the four sides of the surface is shared. By doing so, the form body can be effectively used.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a precast concrete according to one embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a relationship between a mold main body of FIG. 1 and fixing means.

FIG. 3 is a schematic sectional view showing a state where the precast concrete of FIG. 1 is constructed on site.

FIG. 4 is a schematic sectional view showing a precast concrete using fixing means different from that of FIG. 1;

FIG. 5 is a schematic sectional view showing a precast concrete using fixing means different from that of FIG. 4;

FIG. 6 is a schematic sectional view showing a precast concrete using a fixing means different from that of FIG. 5;

FIG. 7 is a schematic sectional view showing a precast concrete using fixing means different from that of FIG. 6;

FIG. 8 is a schematic perspective view showing a mold body different from FIG. 1;

FIG. 9 is a schematic perspective view showing the exploded form body of FIG. 8;

FIG. 10 is a schematic sectional view showing a state in which the form body of FIG. 8 is installed on a precast concrete.

FIG. 11 is a schematic cross-sectional view showing a relationship between a mold body and fixing means.

FIG. 12 is a schematic plan view showing a state where a reinforcing support member different from that of FIG.

FIG. 13 is a schematic plan view showing a state in which a reinforcing support member different from that of FIG.

14A is a schematic cross-sectional view showing a state in which a part of a form body is damaged, FIG. 14B is a schematic cross-sectional view showing a state in which a foaming agent is injected into the damaged part, (C) is a schematic sectional view in the state where the injection of the foaming agent into the damaged portion was completed.

FIG. 15 is a schematic perspective view of the form body in which a reinforcing support member and a top plate incorporated in the form body are exploded.

16 (a) is a schematic cross-sectional view showing a state in which a part of the form body of FIG. 15 is broken, and FIG. 16 (b) is a schematic view showing a state where a foaming agent is injected into the damaged part. Sectional view, (c)
FIG. 4 is a schematic cross-sectional view showing a state where injection of a foaming agent into a damaged portion has been completed.

FIG. 17 is an exploded schematic perspective view showing a corrugated ball form used in a method of constructing concrete for hitting concrete on site.

FIG. 18 is a schematic sectional view of the corrugated ball form showing the relationship between the form main body and the lid.

FIG. 19 is a diagram showing a relationship between a mold body and a lid.
It is a schematic sectional drawing of the step ball formwork different from FIG.

FIG. 20 is a schematic sectional view showing a state in which a corrugated ball formwork is installed at a concrete construction site.

FIG. 21 is a schematic perspective view showing a holding state of the corrugated ball formwork of FIG. 20;

FIG. 22 is a schematic sectional view showing a state where the corrugated ball formwork of FIG. 20 is constructed on site.

FIG. 23 (a) is a schematic cross-sectional view of a state where the step is held and executed in another holding state different from the holding state of the corrugated ball formwork of FIG. 21, and FIG. 23 (b) is It is a schematic perspective view which shows the holding | maintenance state of the corrugated ball formwork before construction.

24 (a) is a schematic cross-sectional view of a state where the corrugated ball form shown in FIG. 23 is held and constructed in another holding state different from the holding state, and FIG. 24 (b) is It is a schematic perspective view which shows the holding | maintenance state of the corrugated ball formwork before construction.

FIG. 25 (a) is a schematic cross-sectional view of a state where the corrugated ball formwork of FIG. 24 is held and constructed in another holding state different from the holding state thereof, and FIG. 25 (b) is It is a schematic perspective view which shows the holding | maintenance state of the corrugated ball formwork before construction.

26 (a) is a schematic cross-sectional view of a state where the corrugated ball form is held and constructed in another holding state different from the holding state of the corrugated ball form shown in FIG. 25, and FIG. 26 (b) is It is a schematic perspective view which shows the holding | maintenance state of the corrugated ball formwork before construction.

FIG. 27 (a) is a schematic cross-sectional view of a state where the corrugated ball form shown in FIG. 26 is held and installed in another holding state different from the holding state thereof, and FIG. 27 (b) is It is a schematic perspective view which shows the holding | maintenance state of the corrugated ball formwork before construction.

FIG. 28 (a) is a schematic cross-sectional view of a state where the corrugated ball form shown in FIG. 27 is held and constructed in another holding state different from the holding state, and FIG. 28 (b) is It is a schematic perspective view which shows the holding | maintenance state of the corrugated ball formwork before construction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Precast concrete 2 Formwork body 3 Fixing means

Claims (6)

[Claims] 1. A precast concrete, a rectangular form surface, and a concave formwork body formed by a step ball formed of four upstanding pieces respectively erected from four sides of the surface. Fixing means for fixing the formwork body to the precast concrete, wherein an opening of the formwork body faces the precast concrete, and the fixing means fixes the formwork body to the precast concrete. Precast concrete characterized by fixing. 2. The precast concrete according to claim 1, wherein each of the four standing pieces is folded, and the folded portion is in contact with the precast concrete.
G. 3. A precast concrete according to claim 1, wherein a plurality of auxiliary support members having a circular or polygonal cross section and made of plastic are provided in the form body. G. 4. A concave frame body formed by a stepped ball comprising a rectangular surface and four standing pieces respectively erected from four sides of the surface, and an opening of the frame body. And a plurality of upper main bars and a plurality of lower main bars installed at a construction site, wherein the step ball is provided between the upper main bar and the lower main bar. A method of constructing a concrete, comprising holding a formwork and then pouring concrete into the construction site to bury the corrugated ball formwork. 5. The concrete according to claim 4, wherein said stepped ball form is held between upper and lower main reinforcements by interposing spacers. Construction method. 6. A concave mold body formed by a stepped ball comprising a rectangular surface and four standing pieces respectively erected from four sides of the surface, and an opening of the mold body is formed. In a method of constructing a concrete which is used by facing the precast concrete and hits the concrete on site, a lid for closing an opening of the form body is added to form a corrugated ball form. In the method of constructing a concrete body, the formwork body is formed by hitting the precast concrete and the concrete on site.
A method of using a formwork body characterized by being shared and used.