JP2976216B2 - Method of constructing structures with free ends - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a structure such as a balcony or a corridor having a parapet and a drain at a free end.

[0002]

2. Description of the Related Art When constructing cantilevered structures or at least one free end structure, such as a balcony or a corridor with at least one open end, reinforcing bars of various shapes are conventionally arranged to reinforce concrete. Had been cast. However, in this case, the entire floor is formed of cast-in-place concrete,
It took much time and cost for the support work, and the labor for forming and arranging the rebar according to the shape of the structure was large, and the cost was high for the area.

[0003] Recently, a composite floor construction method in which concrete is laid with necessary reinforcement on the upper part of a ready-made half PC board is being adopted in this field.

[0004]

However, even in this method, when constructing a structure having a parapet or a drainage ditch at the free end, the use of a custom-made half-PC board increases the cost and increases the cost. In the case of using a mold of the conventional type, there is a problem that the structure is complicated and it takes time to manufacture and assemble, and the advantage of the angled synthetic floor method has not been fully utilized.

That is, as shown in FIG. 4, when a half PC plate (a) integrally formed to the free end portion is used, a specially shaped rebar assembly (b) for reinforcing a parapet or a drainage groove is incorporated. A half PC board is required. Therefore, mass production is not possible and the cost is high, and the protruding portion is damaged at the time of transportation, and there is a problem that the volume becomes large and extra transportation cost is required. As shown in FIG. 5, when a general-purpose half PC board (c) is used, a parapet or a drain groove (d) is formed with a control panel (e). It was a costly operation. In FIGS. 4 and 5, reference numeral (f) indicates a support structure made of joists and large pulling members, and (g) indicates cast-in-place concrete. Also, the formwork and shoring of the beam part were omitted.

[0006]

Means for Solving the Problems The inventors of the present invention have made intensive studies and completed the present invention, and the feature of the present invention is that SFC is used as a mold for forming a parapet and a drain in a synthetic floor method. A plate is used and is securely supported by a simple metal fitting. After the concrete is cast, the form is used as it is for a part of the structure. Therefore, it has become possible to provide a construction method having advantages in workability, construction period, and cost.

Hereinafter, the method of the present invention will be described. First, in the present invention, a half PC board is a thin-walled reinforced concrete floor board into which a reinforcing bar assembly is driven, and an SFC board is
It is a concrete thin plate using steel fiber instead of reinforcing steel. The parapet referred to in the present invention has a low height (about 300 mm or less), and a metal handrail or the like is attached to its upper part as necessary.

The half PC board used in the present invention has a thickness of 5
It is a flat plate of about 0 to 100 mm. This half P
After the C-plate is supported by the shoring, the upper end of the slab is connected to the reinforcing bar assembly projecting above it, and the reinforcing bars that form the beams and the reinforcing bars of these reinforcing members and the upper end of the slab are connected with reinforcing bars. Connect or rebar the parapet parts. Also, SFC
The plate is a concrete plate in which steel fiber is mixed and reinforced by a known method and has a thickness of about 10 to 40 mm, more preferably about 25 to 30 mm. This SFC
The plate is used as a front plate constituting the outer surface of the parapet and as two groove side plates constituting the inner wall surface of the drainage groove.
The front plate is attached to a screwdriver embedded in the end surface of the half PC plate with a fastener. On the other hand, the mounting of the groove side plate is performed by mounting the supporting metal in parallel with a U-shaped supporting metal in a sectional view, and then supporting the supporting metal with a bolt metal fitting on an upwardly embedded long screw cone of the half PC board. These front plates and groove side plates are put into concrete and left as they are to be discarded formwork. The thickness of the resulting composite floor is about 15 to 30 cm, depending on the type and size of the structure.

In addition, the mounting method of the front plate and the groove side plate can be carried out by using various types of fittings or detachable metal fittings other than using the screw control described above.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. 1 to 3 show an example in which the present invention is carried out, in which a balcony 3 having a low height parapet 1 and a drain 2 is constructed. First,
FIG. 1 shows only the half PC board 4 and shows a state in which a mold for forming a parapet 1 and a drain groove 2 is assembled at this free end, and FIG. 2 is an enlarged view of a main part thereof. . Then, as shown in FIG. 3, the upper slab reinforcement, reinforcement, and the like are arranged on the upper part of the half PC board 4, and then concrete is poured to complete the balcony 3.

As shown in FIGS. 1 and 2, the half PC board 4
A screwdriver 5 is buried in the front end face 4a, and a front plate 7 is attached to the front end face 4a by tightening a fastening member 8 via a rubber packing 6. This rubber packing 6
Is for filling the gap between the front end face 4a of the half PC board and the front board 7, and may be removed when the construction is completed, or may be embedded as it is. The screw control 5 is buried at an interval of about 150 to 200 mm. As the half PC board 4, for example, one having a thickness of about 65 mm is used. The half PC board 4 is a factory product obtained by casting concrete on a reinforcing bar assembly 4c which is welded to the slab lower end bar 4b at appropriate intervals. The reinforcing bar assembly 4c of the present embodiment includes a top bar 4d, a lattice bar 4e, and a lower bar 4f.

On the other hand, the groove side plates 9 and 10 are attached in parallel to a support fitting 11 having a U-shape in cross section.
Is installed in the half PC board 4 in the upward direction with a long screw
And fixed with bolts 13. Long screw control 1
2 is also buried at an interval of about 150 to 200 mm. The groove side plates 9 and 10 have embedded bolts 14 and 1 respectively.
5 are buried. The bolts 14 and 15 are passed through the through holes of the support fitting 11, and are tightened and fixed with nuts 16 and 17. The wider groove-side plate 9 constitutes the inner wall surface of the parapet 1 by being paired with the front plate 7 and is connected to the front plate 7 by a connection fitting (separator) 18. Reference numeral 19 denotes an embedded bolt embedded in the front plate 7, and reference numeral 20 denotes an embedded bolt embedded in the groove side plate 9. Front plate 7, groove side plate 9, 1
As 0, for example, one having a thickness of about 25 mm is used.

Next, as shown in FIG. 3, the half PC board 4 is supported by a support 21 consisting of a joist, a large pull, and a support rod. 23, after welding the rebar 24 of the parapet part, concrete 25 is poured into the groove side plate 10 to a thickness of about 14 cm to complete the construction of the balcony 3 by a synthetic floor method of about 20 cm in thickness. In the drawing, reference numeral 26 denotes a beam reinforcing bar. Also, concrete 25 is poured between the front plate 7 and the groove side plate 9 to form the parapet 1 portion. The drainage groove 2 is formed by slightly casting concrete between the groove side plate 9 and the groove side plate 10. The front plate 7 and the groove side plates 9 and 10 can be attached to the half PC plate 4 before or after being supported by the shoring, but the former is more efficient.

Since the front plate 7 and the groove side plates 9 and 10 can be left as they are as embedded molds, if the concrete is cast and leveled and then dried and the support is removed, the parapet 1 and the drainage groove 2 can be removed. Once the balconies are ready, they are just finished. Note that a handrail pipe may be embedded and fixed on the upper surface of the parapet 1.

Although the description has been given of a balcony, a corridor, a passage, or the like, at least one of which is open, can be constructed in a similar manner.

[0016]

As described above, according to the present invention, the half P
In the synthetic floor construction method using a C board, an SFC board is used as a mold for forming a parapet and a drainage channel, and after casting concrete, the mold is discarded and used as a part of a structure as it is for a part of the structure. Therefore, there is no need to use a half-PC board having a special structure in which a parapet or a drainage channel is formed in advance at the free end, and there is no need for assembling a conventional formwork at the free end or extra work of removing the mold. Floors having free ends such as balconies, bay windows, corridors, etc. can be easily constructed by a synthetic floor method having a very high degree of freedom.

In particular, the front plate made of the SFC plate is attached to a screw-container embedded in the end surface of the half PC plate with a fastener, and two S-plates are attached.
By attaching the FC plate groove side plate to a U-shaped support bracket and supporting the support bracket with a bolt screw on a long screw capacitor buried upward in the half PC board, work efficiency is greatly improved and cost reduction is realized. There is an effect that can be done. It has the feature that construction can be done very easily without cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a half PC board part for constructing a balcony.

FIG. 2 is a partially enlarged sectional view of FIG.

FIG. 3 is a cross-sectional view of a balcony in a state where concrete is cast.

FIG. 4 is a cross-sectional view showing an example of a balcony construction by a conventional synthetic floor construction method using a half PC board.

FIG. 5 is a cross-sectional view showing another example of a balcony construction by a conventional composite floor construction method using a half PC board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Parapet 2 Drainage groove 3 Balcony 4 Half PC board 7 Front plate 8 Fastening fitting 9 Groove side plate 10 Groove side plate 11 Support metal fittings 21 Shoring 25 Concrete

Claims (2)

(57) [Claims] 1. A intended to build the half PC board structure with a parapet and drainage grooves on the free end portion to Da設concrete performs the necessary reinforcement to the top of, forming a parapet and culvert If you use the SFC plate as a mold to be used as it the concrete after casting mold frame part of the structure
In the case, the SFC plate forming the outer wall of the parapet is
A method for constructing a structure having a free end, wherein the structure is fixed to a free end of a PC board . 2. A front plate made of an SFC plate constituting an outer surface of a parapet is attached to a screwdriver embedded in a tip end surface of a half PC plate with a fastener, while two SFC plates constituting an inner wall surface of a drain groove are provided. 2. The free end according to claim 1, wherein the groove-side plate is attached to a U-shaped support bracket, and the support bracket is supported by a bolt screw on a long screw-container buried upward in the half PC board to form a mold. Method of constructing a structure equipped with.