JPH073919A - Buried formwork construction for constructing wall beam - Google Patents

Abstract

PURPOSE:To simply attain levelling and positioning in the horizontal direction of a buried formwork namely a structural beam itself by constituting a buried formwork for constructing a wall beam into a divided formwork so as to be suitable for custody and transport, and further forming the divided formwork into a unique connecting construction. CONSTITUTION:A buried formwork for constructing a wall beam is constituted of a pair of buried formworks 4,5 for wall, and formworks 7 for beam which are separated from them and provided with formwork materials 6 for beam bottom corner joined with the respective buried formworks 4,5 for wall. The end edges of the formwork materials 6 for corner are contacted with the upper outer face of the buried formworks 4.5 for wall, and in addition the buried formworks 4,5 for wall are provided with formwork receiving tools 28 for supporting the formwork materials 6 for corner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast buried formwork structure for constructing a wall beam of a building.

[0002]

2. Description of the Related Art Compared with the construction of wooden concrete panels which are thrown away once or several times, there is less waste of resources, and the construction period can be shortened by leaving the precast formwork exposed. Therefore, embedded formwork tends to be widely used for construction of beams with walls.

The beam with a wall is classified into a so-called concentric type in which the width center of the beam is aligned with the width center of the wall and a so-called eccentric type in which one side face of the beam is aligned with one side face of the wall. For the former construction of the concentric type beam with walls, as shown in FIG. 8, an embedded beam form 52 having a form material 51 for a beam bottom corner is provided with a pair of embedded wall forms. As the eccentric type beam with a wall, which is connected to the upper portion of the frame 53, as shown in FIG.
A wall-embedded formwork 55 having a series of 4 and a wall-embedded formwork 53 with a beam-embedded formwork 52 having a formwork material 51 for a beam bottom corner are used.

[0004]

By the way, conventionally, as described above, the embedded beam form 52 having the form material 51 for the beam bottom corner is integrally connected to the embedded wall form 53. Since the entire structure is made into a crank shape in the end view, as shown in FIG. 10, even if the corner portions are meshed with each other during storage or transportation, the whole becomes bulky, and the storage or transportation space is wide. There was a problem.

Further, the long wall embedded formwork 53 is supported at one end by the corner formwork material 51, that is,
Since the wall-mounting formwork 53 is carried by the corner formwork 51 in a state in which the wall-mounting formwork 53 is laid down in a mountain shape, a shock at the time of transportation causes a wall-embedding formwork to be formed near the continuous portion of the corner formwork member 51. There was a risk that 53 was easily broken.

The present invention has made it possible to solve the above problems by a very simple and rational improvement and to overcome the inconveniences, that is, the difficulty of leveling and positioning of beams. It is intended to provide a buried formwork structure for building a beam with walls.

[0007]

The first aspect of the present invention is directed to an embedded formwork structure for constructing a so-called concentric type beam with a wall, which is an embedded mold for constructing such a beam with a wall. The frame structure is composed of a pair of buried molds for walls and a buried mold for beams provided with a mold material for a beam bottom corner which is joined to each of the buried molds for walls separately from them. And an edge of the corner formwork is brought into contact with the upper outer surface of the wall-embedded formwork, and the wall-embedded formwork is provided with a formwork receiving member for supporting the corner formwork material. ing.

The second invention is intended for an embedded formwork structure for constructing a so-called eccentric type beam with a wall, and one of the embedded formwork structures for constructing a beam with a wall is A pair of buried formwork for walls, which is provided with a series of flat beam side formwork materials,
It is composed of a beam embedded formwork provided with a formwork material for a beam bottom corner which is joined to the other wall embedded formwork separately from these,
In addition, the edge of the corner formwork material is brought into contact with the upper outer surface of the wall-embedded formwork, and the wall-embedded formwork is provided with a formwork receiving member for supporting the corner formwork material. There is.

[0009]

According to the characteristic construction of the first aspect of the present invention, the concentric-type beam with a wall is provided by abutting and supporting the end edges of the corner mold members to the upper outer surfaces of the pair of wall-embedded molds. A buried formwork structure for construction is constructed.

According to the characterizing feature of the second invention, one wall-embedded formwork provided with a series of flat beam side part form members is relatively opposed to the other wall-embedded formwork, and the other of the other wall-embedded formwork. An eccentric type embedded formwork for building a beam with a wall is configured by abutting and supporting the edge of the corner formwork material to the upper outer surface of the embedded formwork for walls.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a part of a building under construction, and more specifically, a floor slab extending over a so-called concentric type wall beam 1 for doors and an eccentric type wall beam 2 for outer walls. Three
Shows the state where the is built.

Each of the beams with walls 1 and 2 is constructed by a precast embedded formwork, and the embedded formwork structure used to construct the concentric type walled beam 1 is as follows.
As shown in FIG. 2, a pair of wall-embedded molds 4 and 5 and a mold material 6 for the beam bottom corner, which is joined to each of the wall-embedded molds 4 and 5 separately. And an embedded formwork 7 for a beam.

As shown in FIG. 3, the buried molds 4 and 5 for walls are formed by connecting flat mold members 8 and 9 made of precast, which are molded by vacuum extrusion of short fiber reinforced mortar, in the width direction. Then, on the inner surfaces of the respective form members 8 and 9, reinforcing ridges a are formed over the entire length in the longitudinal direction at predetermined intervals in the width direction, and a part of the ridges a is enlarged and illustrated, as shown in FIG. The cross-sectional shape of the ridge portion a is formed into an inverted trapezoidal shape in order to enhance the adhesive force with the cast-in-place concrete, and in order to prevent displacement of the formwork materials and leakage of concrete, In the joint portion, concave and convex portions b and c that mesh with each other are formed.

The wall-embedded mold 4 on one side in the wall width direction has a large mold structure in which a plurality of mold members 8 are assembled as described below, for example. That is, a bolt 10 with a flange d that penetrates the ridge a of the form member 8, a female screw member 11 that is screwed into the bolt 10, and a retainer 12 that is loosely fitted to the bolt 10.
And a fastening means 12 for tightening the holding tool 12 and a fixing nut 13 to set the holding means 12 on the outer surface to a predetermined position of the form material 8, and form a plurality of the form materials 8. While sequentially arranging in the width direction, the outer surface of the mold is placed on a spacer as appropriate, and the concave and convex portions b and c of the adjacent mold materials 8 are abutted and meshed with each other via an adhesive, A member 15 for reinforcing the form material is arranged on the outer surface of the plurality of form members 8 and the reinforcing member 15 is pressed and fixed between the retainer 12 of the coupling means 14 and the form member 8. Thus, the plurality of formwork materials 8 are integrated by a base structure.

When constructing the beam 1 with a wall, as shown in FIG. 2, the embedded formwork 4 for a wall having the above-mentioned construction is built on one side in the wall width direction of the wall constructing portion, and wall reinforcement 16 is formed in the wall constructing portion. Is installed,
And, the frame interval regulator 17 composed of a bolt is set on the female screw member 11 of the coupling means 14 through the reinforcing bar gap.
Further, another female screw member 18 is attached to the end of the interval regulator 17.
Then, the other embedded mold 5 for the wall is built on the other side in the wall width direction of the wall building portion.

The embedded formwork 5 for wall is built in the following manner. That is, each of the mold members 9 is brought to the other side in the wall width direction with the protruding portion a facing the wall reinforcing bar 16 side, and the above-mentioned another is passed through the hole formed in the protruding portion a of the mold member 9. A bolt 19 with a flange e is screwed onto the female screw member 18, and the concavo-convex portions b and c of the adjacent frame members 9 are sequentially abutted and meshed with each other via an adhesive.

Then, a member 20 for reinforcing the form material is arranged on the outer surface of the plurality of form material 8 and,
The reinforcing member 20 is fixed by the connecting means 23 composed of the retainer 21 and the nut 22 that are loosely fitted to the bolt 19, and the plurality of frame members 9 are integrated.
This completes the building of the wall-embedded form 5 on the other side in the wall width direction of the wall building portion.

In order to cope with the unevenness of the floor surface, as shown in FIG. 2, the level adjusting packing f is fixed to the concrete surface with, for example, concrete nails h, and the mold material 9 is attached to the upper surface.
And, finally, the pier 24 for pressure reception that extends over the lower end of the form material 9 and the packing f is fixed to the concrete nail i.
It is fixed on the concrete surface by.

Next, the embedded formwork 7 for the beam and the floor formwork 25 made of plywood are installed, and the reinforcements 26, 27 for the beam and the floor are arranged.
In order to install the buried beam formwork 7 at a predetermined position, formwork holders 28 are provided on the upper outer surfaces of the wallwork formworks 4 and 5, respectively, and the floor formwork 25 is used. In order to support the above, the embedded frame for beam 7 is also provided with a frame receiver 29.

These mold frame receivers 28 and 29 are preliminarily constructed with the wall-embedded mold frames 4 and 5 in a state in which the leveling adjustment of the receiving surface is possible by the connecting means 30 having the same structure as the above-mentioned connecting means 14. Although it is fixed to the embedded beam form 7, it may be attached after the completion of the embedded wall forms 4 and 5 in a predetermined level.

The embedded mold 5 for a beam has a beam side part frame member 31 in which a longitudinal ridge j is formed on the inner surface at the edge of the rising plate of the beam bottom corner mold member 6. Are joined to each other by butt joining, and the joints are provided with concave and convex portions m and n that mesh with each other.

Thus, the pair of embedded beam molds 7, 7 in which the concave and convex portions m, n are butt-joined with each other via the adhesive, are connected to the corner frame members 6 by the connecting means 14,
Connecting means 32, 33 and reinforcing member 34 having the same structure as 23
And the corner form material 6 is suspended by a lifting machine so that the end edges of the corner form material 6 are brought into contact with the upper outer surfaces of the wall-embedded formwork 4 and 5, and the corner form material 6 is While supporting the floor formwork 25 with the frame formwork fixture 29 on the side of the embedded formwork 7 for beams, and appropriately nailing them together, the beam reinforcement 26 and the floor reinforcement 27 and is constructed.

On the space between the wall-mounted molds 4, 5 and between the beam-mounted molds 7, 7, and on the floor mold 25, the wall, beam and floor reinforcements 16, Concrete is placed in a state of embedding 26 and 27, and after that, waiting for the curing of the concrete, the coupling means 14, 23, 30, 32 and 33 are dismantled, and the reinforcing members 15, 20, 34 are removed. By removing the floor formwork 25, the so-called concentric type wall with beam 1 and the floor slab 3 are constructed.

According to the above-mentioned structure, conventionally, an embedded mold for a beam provided with a frame material for a corner of a beam bottom is integrally connected to an embedded mold for a wall to form an embedded mold for building a beam with a wall. While the frame structure is formed in a crank shape, this is made up of a plurality of mold members 8,
9 is divided into wall-embedded forms 4 and 5 and a beam-embedded form 7 which is separate from these, and the beam-embedded form 7 is used as an L-shaped corner form member 6. Since it is divided into a plate-shaped beam side part form material 31, as shown in FIG. 4, they can be compactly put together by stacking them individually at the time of storage or transportation, and moreover, for a wall. Since the buried forms 4 and 5 are flat and simply stacked, there is no risk of damage due to shock during transportation.

Then, as a joining structure of the corner mold member 6 to the wall buried mold members 4 and 5, the corner mold member 6 is used.
Since the end edges of the beams are brought into contact with the wall embedded molds 4 and 5, and the corner mold members 6 are supported by the frame receivers 28, the leveling of the beam embedded mold 7 and Horizontal positioning is easily achieved.

That is, as a joining structure of the divided molds, it is conceivable that the corner mold material 6 of the beam buried mold 7 is placed on the upper ends of the wall buried molds 4 and 5. In the structure, in order to achieve the leveling of the embedded beam formwork 7 as predetermined, it is necessary to perform a difficult installation work that severely sets the leveling of the upper ends of the embedded formwork walls 4 and 5. A means for preventing the horizontal displacement of the embedded formwork 7 is required.

However, according to the above construction, the leveling of the frame receiving tool 28 with respect to the beam embedded mold 7 is easily achieved, and the wall embedded forms 4, 5 themselves are embedded in the beam. Frame 7
Since it has the function of preventing the positional deviation with respect to, the leveling and the horizontal positioning of the embedded beam form frame 7 can be easily achieved.

FIG. 5 shows an embedded formwork structure for constructing a so-called eccentric type beam 2 with a wall. This embedded formwork structure includes an embedded formwork 42 for walls, which is provided with a series of flat beam side formwork materials 41, an embedded formwork 43 for walls below the beam, which is relatively opposed to the embedded formwork 42. An embedded formwork for a beam which is a separate body from the embedded formwork 43 and is joined to the embedded formwork 43 for the wall (the formwork material 44 for the beam bottom corner and the beam side formwork material butt-joined thereto) 45.) 46.

In such an embedded formwork structure, the formwork material 47 of one of the wall-mounted formwork 42 has a dimension equal to or more than the thickness of the floor slab and the length of the beam side formwork material 41 is the other. Other configurations except that it is formed to be longer than the frame material 48 of the above, and the building of the wall embedded molds 42, 43, the means for connecting the wall embedded molds 42, 43, and the beam embedded mold. The joint structure of the frame 46 is based on the buried form structure for building a beam with a wall of the concentric type shown in FIG. 2, and therefore, the same reference numerals are given to the same constituent members to avoid redundant description. Needless to say, the same effects as those of the buried formwork structure shown in FIG. 2 are achieved.

In each of the above-mentioned embodiments, the embedded beam molds 7, 46 are divided into corner mold members 6, 44 and beam side mold members 31, 45. It is also possible to implement the embedded molds 7 and 46 having an L-shaped structure in which mold materials for corners and beam side portions are integrally connected.

In each of the above-mentioned embodiments, a plywood formwork for removing the mold after hardening of concrete is used as the floor formwork 25. A steel plate buried formwork such as a deck may be used. In this case, as shown in FIGS. 6 and 7, a channel portion 51 having a groove 50 with a downward opening that fits into the upper edge of the embedded frame for a beam from above and the channel portion 51 was bent at a right angle from the opening edge of the groove. It is desirable to use a flat deck bracket 53 made of steel plate with a horizontal receiving plate portion 52. Support plate 5
2 and the end of the flat deck (form 25 for floor) may be nailed, but since they are steel plates, it is also possible to fix them by means such as spot welding or adhesion with a metal adhesive. . In the drawing, 30a is a resin wooden connector (a synthetic resin cone in which a metal screw tube is embedded), 30b is a flanged bolt, 30c is a flat rib washer, and 30d is a nut. Are configured. Reference numeral 25a is a reinforcing rib bent and formed on the lower surface of the flat deck.

[0032]

As described above, in both the first and second inventions, the embedded formwork for constructing the beam with the wall is divided into the embedded formwork for walls and the embedded formwork for beams. By stacking these, it becomes suitable in terms of storage and transportation, and in particular, the embedded formwork for walls has a simple flat plate shape, and there is no problem of damage due to shock during transportation.

Further, the edge of the corner form material is brought into contact with the upper outer surface of the wall-embedded formwork, and the corner formwork material is supported by the formwork receiving tool on the wall-embedded formwork side. By adopting a peculiar joint structure of split formwork, it was possible to easily achieve leveling and horizontal positioning of the embedded formwork for the beam and by extension the building beam itself.

[Brief description of drawings]

FIG. 1 is a construction sectional view of a concentric type and an eccentric type beam with a wall and a floor slab.

FIG. 2 is a sectional view showing a buried formwork structure for constructing a concentric type beam with a wall.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a schematic view showing a superposed state of formwork materials.

FIG. 5 is a cross-sectional view showing an embedded formwork structure for constructing an eccentric type beam with a wall.

FIG. 6 is a cross-sectional view of an essential part for explaining the accommodation of an end portion when a flat deck is used as a floor formwork.

FIG. 7 is a perspective view of a flat deck bracket.

FIG. 8 is an explanatory view showing an embedded formwork structure for constructing a beam with a wall of a concentric type in a conventional example.

FIG. 9 is an explanatory view showing an embedded formwork structure for constructing an eccentric type beam with a wall in a conventional example.

FIG. 10 is a schematic view showing a superposed state of mold materials of a conventional example.

[Explanation of symbols]

4, 5, 42, 43 ... Wall-embedded formwork, 6, 44 ... Corner formwork material, 7, 46 ... Beam-embedded formwork, 28 ... Formwork receiver, 41 ... Beam side part formwork material.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Tabata 32-32-1, Shiba, Minato-ku, Tokyo Haseko Corporation

Claims (2)

[Claims] 1. A precast embedded formwork structure for constructing a beam with a wall, wherein a pair of embedded formwork for walls and a beam joined to each of the embedded formwork for walls separately from them. An embedded formwork for beams having a formwork material for bottom corners, and the edge of the corner formwork member is brought into contact with the upper outer surface of the embedded formwork for walls, and the embedded formwork for walls An embedded formwork structure for building a beam with a wall, which is provided with a formwork receiver for supporting a formwork material for corners. 2. A precast buried formwork structure for constructing a beam with a wall, wherein a pair of buried formwork for walls is provided with a series of beam side formwork members, one of which is different from the other. An embedded beam formwork having a beam bottom corner formwork material which is joined to the other walled formwork by a body, and the edge of the corner formwork material is an embedded wall formwork. An embedded formwork structure for constructing a beam with a wall, wherein the embedded formwork for walls is provided with a formwork receiving member for supporting a formwork material for corners.