JPH09111859A - Pc placing execution work method of concrete balcony - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an execution work method of a concrete balcony by which the finish of a step difference joining part of a concrete handrail of a window edge balcony and a floor balcony becomes excellent and efficient. SOLUTION: At installing time of a placing form to form a floor slab of a concrete building, a PC handrail 10 for a floor balcony is arranged in a handrail installing position of a placing form 40 to form an overhang floor by placing it on a support material S for the placing form. Concretes of the floor slab and the overhang floor 30 are simultaneously placed, and a floor balcony A is formed. Afterwards, at installing time of both forms of a placing form to form a wall and a placing form to form the floor slab of a just above floor, a PC handrail 20 for a window edge balcony is arranged in a placing form 60 to form an overhang floor for the window edge balcony while joining it to the PC handrail 10. Concretes of a wall, the floor slab of a just above floor and the overhang floor for the window edge balcony are simultaneously places. There is also a method of additionally attaching the PC handrail after the overhang floor is previously formed.

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 concrete balcony in which concrete handrails of a window balcony and a floor balcony of a concrete building are connected in different steps, and in particular, the concrete handrail is made of PC (precast concrete is used). By doing so, the construction efficiency and the like have been remarkably improved.

[0002]

2. Description of the Related Art Due to the diversification of architectural designs, not only conventional floor balconies but also window balconies on the left and right sides of the floor balconies are connected in different stages. You can open the big window and go out to the floor balcony,
A flowerpot in which a flower or the like is planted can be placed using a window balcony. In a concrete building such as a condominium in which the window balconies and the floor balconies are connected in a staggered manner with each other's concrete handrails, when constructing such a type of floor balconies with concrete, form and form a formwork. The method of constructing with concrete is common.

When constructing a building on the upper and lower floors with concrete, the concrete on the outer wall of the lower floor is usually placed together with the concrete on the floor slab on the upper floor. Therefore, in the conventional method of constructing a floor balcony in which handrails are connected to each other in a step different from that of the above-mentioned window balcony by pouring concrete, for example, a casting formwork of the floor balcony on the second floor is formed and the floor slab on the second floor is formed. At the same time as placing concrete on the part,
As shown in Fig. 8 (a), the floor balcony on the second floor is also formed by concrete pouring. After that, when placing concrete on the floor slab on the third floor, concrete is placed on the outer wall on the second floor. At the time of placing the concrete on the outer wall of the second floor, concrete is placed in the casting form for the window balcony on the second floor that has been formed in advance, and as shown in FIG. To form. That is, the concrete handrail of the floor balcony and the concrete handrail of the window-side balcony that have already been formed are connected.

However, since it is quite difficult to make a precise joint, as a method for avoiding such a joint, a method of constructing the floor balcony and the window balconies at the same time, including the handrail part, is also a complicated method. Are known. On the other hand, along with the positive use of PC in concrete construction in recent years, the use of PC for floor balconies and the like has been considered. However, the use of PCs is carried out exclusively on the so-called floor balcony portion or the window-front balcony portion without steps. For example, Balconi itself can be integrated into a PC and attached to the outer wall, or it can be time-consuming, but the floor balcony can be subdivided into PCs, and the PCized parts can be connected together at the site, and the connected parts can be post-cast concrete. There are many examples of construction.

[0005]

As described above, the floor balcony in which the handrails are connected to the window-top balcony in different steps is conventionally constructed by concrete pouring.
However, when the floor balcony and the window-side balcony are separately constructed by concrete casting as described above, the concrete handrails of the window-side balcony and the floor balcony are forced to join the concrete. In such concrete splicing, it is difficult to form a mold for the splicing part, and there are steps in the splicing part after the formation of the casting, especially in the case of exposed finish that makes use of the texture of concrete It looks bad. However, in order to avoid such a connection, the window balcony and the floor balcony must be simultaneously installed as described above. In the case of simultaneous casting, there is a step at the handrail connection portion between the window balcony and the floor balcony, which makes it difficult to form the formwork and is troublesome.

Although it is possible to use a PC, it is not realistic to use a PC on a window balcony and a floor balcony in terms of weight and bulk. Further, as seen in the conventional single floor balcony, if it is subdivided too much, it takes time and effort to connect the PC-made parts on site. Especially when installing a lot of such floor balconies such as apartments,
The conventional PC-based method of over-dividing is poor in construction efficiency and difficult to employ. The applicant believes that a construction method that is advantageous in terms of efficiency and the like should be created by using a part of the construction method as the PC construction method without being biased to either the construction method or the PC construction method. It was Therefore, the present invention has been proposed in view of the above problems to be solved, and by combining a part of the window balcony and the floor balcony where the concrete handrails are joined to each other in a stepped manner, the stepped joint portion between the handrails is connected to each other. The purpose is to provide a concrete balcony construction technology that has a good finished appearance and is efficient.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application is such that the window balconies of concrete buildings and the concrete handrails of the floor balconies are separate PCs (precast). (Concrete) A method of constructing a concrete balcony, which is formed by joining handrails to each other, and the overhanging floor portions of both balconies are formed simultaneously with the floor slab of the concrete building and the concrete of the wall. At the time of installing the casting formwork for forming the floor slab of the object, the PC handrail for the floor balcony is installed on the projecting form for forming the floor slab, which is provided together with the casting formwork for forming the floor slab, The floor slab and the overhanging floor of the floor balcony are simultaneously poured into concrete to form the floor balcony, and then the wall is formed. At the time of installing both the formwork of the formwork and the formwork for floor slab formation on the floor immediately above, in the formwork for forming the overhanging floor for the window balconies provided together with the formwork form for wall formation, The PC handrail for window balconies is installed while being joined to the PC handrail for floor balconies, and the concrete of the floor slab on the wall and the floor immediately above and the overhanging floor for the window balconies is simultaneously cast to form a PC. Measures have been taken to form a floor balcony and window balconies where the handrails are connected to each other.

By combining only concrete handrails with PC (precast concrete), the combination of concrete handrails on the floor balcony and the window balconies can be done on both PCs.
It can be done by joining handrails together. Therefore, it is not necessary to perform concrete splicing of the joining part or complicated one-shot finishing of the joining part, which was a difficult point of the conventional construction method, and the finish appearance of the joint between concrete handrails is also nice and good. Become. Further, in the above-mentioned configuration, since both the handrails of the window balcony and the floor balcony are PC handrails, it is less labor-intensive than the construction method in which concrete is placed in the connecting portion where the concrete handrails are uneven. Handrails can be joined together in a short time. Further, the concrete on the overhanging floors of both balconies may be cast simultaneously with the concrete pouring of the floor slab and the wall of the concrete building, which is more efficient than the case of performing concrete pouring separately.

Therefore, the construction can be carried out without largely changing the concrete placing process of the conventional concrete building, which facilitates on-site correspondence. Further, in the configuration of the present invention, the labor of forming the form can be saved by making only the handrail part standing upright from the troublesome floor part such as form forming into the precast concrete. At the same time, since PCs other than the handrails are not used, it is possible to greatly reduce the time and labor required for joining the subdivided PC parts, and as a result, the construction efficiency can be greatly improved.

[0010] The invention described in claim 2 is the same as the claim 1.
In the invention described in (1), the installation of the PC handrail for the window tip and the PC handrail for the floor balcony on the projecting form for forming the overhanging floor is carried out by corresponding the overhanging floor of the PC handrail for the floor balcony and the PC handrail for the window balcony. A notch having an inverted L-shaped cross section having a notch height corresponding to the overhanging floor thickness is provided at the joint portion with, and the notch portions of the both PC handrails are respectively provided with corresponding overhanging floor forming strikes. While biting on the handrail installation end side of the setting formwork, the means for placing the support on the support material for the casting formwork was taken.

According to such means, since both PC handrails are installed on the projecting form for forming the overhanging floor by placing them on the support material for the projecting form, when they are attached using a binding member or the like. Compared to the above, it can be installed easily in a very short time without any trouble (for example, it may be hung and placed at a predetermined position with a crane or the like). In addition, since the connecting portion of the PC handrail to the overhanging floor is formed in an inverted L-shaped notch, and the notch is installed on the handrail installation end side of the overhanging floor forming casting frame, PC The notch surface of the handrail joint will also serve as the weir plate on the handrail installation end side of the window form balcony or overhanging floor forming casting formwork, and it is necessary to newly install the weir plate on the installation end side. Absent. In particular, when installing a PC handrail for a floor balcony or a window balcony on a projecting form for forming an overhanging floor, the cutouts are installed so that the PC handrail is installed. Joining with a PC handrail by placing
Since it is performed on two sides with the inverted L-shaped notch face sandwiching the corner on the handrail installation end side of the overhanging floor, compared to the case where the overhanging floor and the PC handrail are butted against the end and joined at one side of the abutting surface. You can do it reliably.

Further, in the invention described in claim 3, in the invention described in claim 1 or 2 having the above-mentioned structure, the window tip PC
When installing the handrail and the PC handrail for the floor balcony on the projecting mold for forming the overhanging floor, the PC handrail for the floor balcony and the PC handrail for the window balconies were made to project at the joint portion with the overhanging floor or wall. Measures were taken to connect the connecting rebar to the overhanging floor reinforcing bar or the wall reinforcing bar. By taking such measures, it is possible to secure the strength of the joining portion between the PC handrail and the overhanging floor and the wall, and at the same time, improve the installation stability of the PC handrail on the overhanging floor forming casting formwork. Can be increased.

In the invention according to claim 4, the window balconies of the concrete building and the concrete handrails of the floor balcony are formed by joining separate PC (precast concrete) handrails to each other. The overhanging floor part is a construction method of a concrete balcony that is simultaneously cast with the floor slab and the concrete of the wall of the concrete building, and the overhanging floor of the window tip balcony and the floor balcony is The floor slab and the wall are formed by concrete casting at the same time, and then, at the handrail installation ends of the two overhanging floors, the corresponding window-end balcony PC handrails or floor balcony PC handrails are respectively installed. Floor barco in which PC handrails are attached to each other while being attached to each other, and PC handrails are connected to each other. It took measures to form the over and Madosaki balcony.

Further, since the present invention is a post-installation method for PC handrails, it can be constructed without drastically changing the concrete placing process of the conventional concrete building, and it is easy to handle on site. Further, in the configuration of the present invention, since only the handrail is made into a PC, the labor involved in the attachment of the handrail is mainly limited to the effort to attach the handrail to the overhanging floor or the wall, and when the PC is further subdivided. Compared with this, it is possible to reduce the labor required for joining the PC-formed portions. Further, since the PC handrail is installed after the formation of concrete on the overhanging floor, the overhanging floor portion can be used as a material carrying-in port for internal work of the building before the PC handrail is attached. Especially in a building with a high floor, it can be used as a projecting platform when hoisting materials, and by smoothly hoisting and carrying in materials from the outside, it can contribute to the construction efficiency of the entire building.

Further, the invention according to claim 5 is the invention according to claim 4, wherein the PC handrail for the window end and the PC handrail for the floor balcony are extended to the floor or the wall, and the PC handrail is extended. A mounting bolt is projected on one side of the end to be attached to the floor or wall and the side on which the PC handrail of the overhanging floor or wall is attached, and the other side is provided with the bolt. Provide a bolt hole for the bolt,
The bolt on one side is passed through the bolt hole on the other side to tighten the nut, and then the bolt connecting portion is filled with grout, and the attachment end side of the PC handrail and the side to which the PC handrail is attached are joined together. A joint treatment is applied to the joint portion. The bolt and nut connection ensured the convenience of the attachment means, and at the same time the injection of grout into the bolt connection ensured a firm attachment strength.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) A concrete balcony PC construction method described in the present embodiment is for placing concrete on the overhanging floors of the floor balcony A and the window balconies B, and using PC handrails on the overhanging floor forming placement formwork. This is a construction method using so-called post-cast concrete after installation. The state before and after placing the concrete is shown in FIG. As shown in FIG. 2, the concrete balconies to be constructed in the present embodiment have PC handrails 20 for window balconies B on both left and right sides of a PC handrail 10 for floor balconies A provided on the outer wall of a concrete building. Are connected in different levels with height differences. As shown in FIG. 3, the PC handrail 10 for the floor balcony A used in the present embodiment is formed in a generally U-shaped cross section. Further, notches 11 are provided on both ends of the side wall to be attached to the outer wall so that they can be joined to the PC handrail 20 for the window balconies in different steps.

Furthermore, a notch 12 is formed in the inner lower end of the PC handrail 10 with the overhanging floor 30 so that the inside thereof is notched in an inverted L shape. The notch 12 is
In the present embodiment, as shown in FIG. 4, the notch height d is set to be slightly longer than the thickness of the overhanging floor 30 of the floor balcony A. As shown in FIG. 4A, the notch height d is set to be at least the thickness of the floor portion 30.
This is because it is used as a barrier plate provided on the end surface of the handrail installation. This is because if the thickness of the overhanging floor 30 is smaller than the thickness of the overhanging floor forming placement frame 40 and the floor balcony PC handrail 10, a gap is generated and concrete placing cannot be performed.

In this embodiment, the floor balcony P
Reinforcing bars 13 are arranged inside the C handrail 10 to secure its strength. This reinforcing bar 13 is a P for floor balcony
From the notch surface 12a, which is a joint portion of the C handrail 10 with the overhanging floor 30, and the end portions of both side surface portions of the floor balcony PC handrail 10 attached to the outer wall, inside the overhanging floor forming casting form 40, respectively. It is protruded so that it can be connected to the floor reinforcing bar and the wall reinforcing bar (not shown) in the wall forming casting form. On the other hand, PC handrail 2 for window balconies
As shown in FIG. 3, 0 is formed in a substantially L-shaped plane cross section,
As shown in FIG. 2, the PC handrails 10 on the floor balcony A are provided with stepped joints on the left and right ends thereof.

Similar to the above-mentioned floor balcony PC handrail 10, as shown in FIG. 3, an inverted L-shaped notch 2 is formed at the joint portion of the window-side balcony PC handrail 20 with the overhanging floor 50.
1 is provided. For the same reason as the notch 12, the notch 21 has a notch height set to be equal to or larger than the thickness of the overhanging floor 50, and the notch surface 21a is provided vertically. Further, inside the PC handrail 20 for window balconies, reinforcing bars 13 are arranged in the same manner as the PC handrail 10 for floor balconies,
A part of the reinforced reinforcing bar 13 is projected for connection with the overhanging floor 50 and the outer wall of the concrete building.
In the present embodiment, the PC handrails 10 and 20 for floor balconies or window balconies having such a configuration are used.
Install the balcony as follows. First, FIG.
As shown in (a), when the casting formwork for forming the floor slab of the concrete building is installed, the projecting formwork 40 for forming the overhanging floor for the floor balcony A is made to project together while being supported by the support material S. Set up.

The inverted L-shaped notch 12 is formed by abutting the handrail installation end of the projecting form 40 for forming the overhanging floor so that the end face is closed by the notch surface 12a of the PC handrail 10 for floor balcony. Install by biting so that it will hang over this end.
For installation, as shown in FIG. 4A, the floor balcony PC handrail 10 is placed on the support material S of the overhanging floor forming casting form 40. After the placement, in the present embodiment, each connecting rebar 13 of the floor balcony PC handrail 10 is connected to the floor reinforcing rebar arranged in the overhanging floor forming casting form 40. After that, at the same time as the concrete casting for forming the floor slab of the concrete building, the concrete is also placed on the overhanging floor forming casting form 40 of the floor balcony A. In this way, the floor balcony A is formed at the same time as the window balconies B by simultaneous casting with the floor slab concrete. This state is shown in FIG.
(B).

The floor slab of the formed concrete building is provided with the outer wall of the floor immediately above and the casting formwork for floor formation. At this time, the casting form 60 for forming the overhanging floor on the balcony of the window
Is also installed at a predetermined height of the wall forming casting form. Further, the PC handrail 20 for the window-front balcony is installed at the handrail installation end of the projecting form 60 for forming the overhanging floor. At the time of installation, the joining end 22 of the PC handrail 20 for window balconies is placed on the notch 11 of the PC handrail 10 for floor balconies. For joining, for example, mortar may be used as an adhesive, and the joint of the formed joints can be firmly formed. Also, the finished appearance of the formed joint is good without any annoying steps caused by concrete splicing or the like. In this way, as shown in FIG. 5B, the PC handrail 20 for window balconies is joined to the PC handrail 10 for floor balconies already formed, and the handrail installation of the casting form 60 for forming the overhanging floor is performed. Install it on the edge side.

When forming the wall-casting formwork, the connecting rebars 13 projecting from the joint portion of the PC handrail 10 for the floor balcony attached to the already formed floor balcony A with the overhanging floor 50. , Overcast floor forming casting form 6
Connect to the floor reinforcing bars in 0. PC for window balconies
The connecting reinforcing bar that is projected to the side of the handrail 20 where it is attached to the outer wall is also connected to the wall reinforcing reinforcing bar. Figure 1 shows this situation.
(C). At the time of forming the casting formwork for forming the floor slab directly above, a projecting form (not shown) for forming an overhanging floor for the floor balcony of the floor immediately above is formed in the same manner as above. After that, when the concrete is cast to form the outer wall of the concrete building and the floor slab on the floor immediately above, the concrete of the overhanging floor 50 of the window-front balcony B is simultaneously cast. In this way, as shown in FIGS. 1 (d) and 5 (c), a concrete balcony in which the floor balcony A and the window-side balcony B have PC handrails 10 and 20 connected in a staggered manner is constructed. be able to.

(Embodiment 2) The concrete balcony construction method described in the present embodiment is as follows: the overhanging floor 300 for the floor balcony A and the overhanging floor 5 for the window tip balcony B.
00 is formed by concrete casting first, and then the floor balcony PC handrail 100 and the window balcony PC handrail 200 are attached, which is a so-called concrete handrail post-installation method. PC handrail 10
The states before and after mounting Nos. 0 and 200 are schematically shown in FIG. PC handrails 100, 200 can be installed after
The handrails 100, 200 and the PC handrail 10
No. 0, 200 is attached to the side (in the present embodiment, the outer wall or the overhanging floor corresponds), and the attachment bolt that has been made to protrude is passed through a bolt hole provided in the other to tighten the nut. It is done by means of attaching.
The bolt connection is filled with grout to strengthen the fixing.

The floor balcony described in this embodiment is also the same as that described in the first embodiment. The floor balcony A provided on the outer wall of the concrete building and the PC of the window tip balcony B on the left and right sides of the PC handrail. The handrail has a height difference and is joined in steps (Fig. 2). The floor balcony PC handrail 100 used in the present embodiment is formed to have a substantially U-shaped flat cross section, as in FIG. 3 described in the first embodiment. In addition, notches 11 are provided on both side surfaces for joining to the PC handrail 200 for the balcony of the window, which is different in level.

A notch 12 which is notched in an inverted L shape is provided at the joint portion of the floor balcony PC handrail 100 with the overhanging floor 300. The notch 12 is set so that the height of the notch is about the thickness of the overhanging floor 300 of the floor balcony, and the notch surface 12a is brought into contact with the end surface of the handrail installation end of the overhanging floor 300 to be in that state. Then, both contact surfaces of the joint portion between the overhanging floor 300 and the floor balcony PC handrail 100 can be connected by bolts. Bolt holes are provided through the notch surface 12a at predetermined intervals along the longitudinal direction, and as shown in FIG. 4B, the bolt holes are projected at predetermined intervals on the end surface portion of the handrail installation end of the overhanging floor 300. It is possible to pass an embedded bolt. On the other hand, at the end of the floor balcony PC handrail 100 attached to the outer wall, bolts are projected in the vertical direction at a predetermined interval so that the bolt can be passed through a bolt hole previously provided in the outer wall. . Further, in the interior of the floor balcony PC handrail 100 having the above-described configuration, the first embodiment is provided.
Similar to the above, reinforcing bars are reinforced. However, unlike the first embodiment, the bars are arranged without protruding.

On the other hand, a PC handrail 200 for window balconies
Also, similarly to the first embodiment, it is formed in a substantially L-shaped plane cross section, and similarly to the case shown in FIG. 2, it can be attached by providing stepwise fittings on the left and right ends of the PC handrail 100 of the floor balcony A. There is. PC handrail for window balconies 200
Also, similar to the above-mentioned floor balcony PC handrail 100, a joint portion with the overhanging floor 500 is formed in an inverted L-shaped notch 21. Bolt holes are provided in the notch surface 21a at predetermined intervals along the longitudinal direction. Further, bolts are provided so as to project at predetermined intervals along the vertical direction on the end surface on the side of the attachment to the outer wall so that the bolts can pass through the bolt holes provided in the outer wall.

In this embodiment, a concrete balcony is constructed by using the PC handrails 100 and 200 for floor balconies and window balconies having the above-described structure in the following manner. First, as shown in FIG. 7 (a), the overhanging floor 300 of the floor balcony A and the overhanging floor 500 of the window-front balcony B are also concrete-cast at the time of concrete casting of the floor slab and the outer wall of the concrete building. Set up. In forming the overhanging floors 300 and 500, both PC handrails 100 and 20 for floor balconies and window balconies are formed from the end surface portions of the handrail installation ends, respectively.
The 0 mounting bolt is embedded so that it is projected. On the other hand, a bolt hole is provided in the outer wall portion to which both the PC handrails 100 and 200 are attached so that the bolt projecting from the end surface of the both PC handrails 100 and 200 on the attachment end side to the outer wall can pass through.

An overhanging floor 300 formed in this manner,
As shown in FIG. 7B, on the end surface portion of the handrail installation end of 500, as shown in FIG. 7B, the floor balcony PC handrail 100,
Also, the PC handrails 200 for window balconies are attached respectively. When installing, both PC handrails 100, 200
The notched surfaces 12a and 21a of the above are brought into contact with the end surface portion of the overhanging floor on the handrail installation end side. In addition, PC handrail 10
The mounting end side of 0, 200 to the outer wall is also brought into contact with the wall surface. In this abutting state, the floors 300 projecting into the bolt holes of the cutout surfaces 12a, 21a of the PC handrails 100, 200,
500 protruding bolts are threaded. In this state, the bolts are tightened with nuts from the outside of the PC handrails 100 and 200, and both PC handrails 100 and 200 are extended to the floors 300 and 50.
Attach to 0.

On the other hand, when attaching the PC handrails 100 and 200 to the outer wall, the protruding bolts of the PC handrails 100 and 200 are
Since it is projected to the indoor side from the bolt hole on the outer wall,
The nut may be tightened on the protruding bolt from the indoor side. Further, after tightening the nuts of the bolts, grouts are filled in the bolt connecting portions to securely fix the connecting portions. On the other hand, as described in the first embodiment, the connection between the PC handrails 100 and 200 is performed by connecting the notch 11 of the PC handrail 100 for the floor balcony previously attached to the overhanging floor 300 in the above-described manner to the window tip balcony. The joint end 22 of the PC handrail 200 may be joined by using mortar as an adhesive.

Further, in this embodiment, since the PC handrails 100 and 200 are attached later by bolt connection, the joint joint portion is also filled with grout, and the joint is securely conducted by the joint treatment. In the above embodiment, the nut connecting side is made lower than the outer wall surface by the thickness of the nut so that the nut tightening portion of the projecting bolt does not project to the outer surface so that the nut portion is embedded. When the embedded portion of the nut is finished by embedding the grout so as to be flush with the outer wall surface, the appearance of the finished appearance is improved.

[0031]

In the structure of the present invention, by using the PC handrail, it is possible to avoid the splicing of concrete or the simultaneous pouring of concrete at the joint portion where the concrete handrails of the window balcony and the floor balcony are different in level. Therefore, the concrete balcony of the above structure can be efficiently constructed in the joining portion without the appearance of the concrete being unsightly and without the troublesome work involved in the simultaneous simultaneous casting. Particularly, in one construction method of the present invention, since the PC handrail is installed on the overhanging floor forming casting formwork by using the placing formwork support material, the handrails are tightly attached. Compared with the case where members are used for attachment, for example, a crane or the like may be used to hang it at a predetermined position and it can be efficiently carried out in a very short time without any trouble. Further, in another construction method of the present invention in which the PC handrail is attached after forming the overhanging floor, the overhanging floor portion of the floor balcony previously formed is used as a platform for lifting material,
Alternatively, the floor balcony part can be used as an entrance for materials into the building. After such use, a PC handrail may be attached, and securing of a material carrying-in port at a site, which is often a problem, is improved by the construction method of the present invention, and the efficiency of construction construction as a whole can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic plan view (a), (b) showing a state before and after placing concrete in a construction method according to a first embodiment.
(C), (d).

FIG. 2 is a plan view (a) and a front view (b) showing a positional relationship between a floor balcony and a window-front balcony according to the present embodiment.

FIG. 3 is a perspective view of a PC handrail for a floor balcony and a PC handrail for a window balcony.

FIG. 4 is a cross-sectional view showing an installation state of a PC handrail for a floor balcony according to the first embodiment (a), and a cross-sectional view showing an installation state of a PC handrail for a floor balcony according to the second embodiment (b).

5A to 5C are cross-sectional views (a), (b), and (c) showing process steps of the construction method according to the first embodiment.

FIG. 6 is a schematic plan view (a), (b) showing a state before and after placing concrete in the construction method according to the second embodiment.

7A and 7B are cross-sectional views (a) and (b) showing the process steps of the construction method according to the second embodiment.

FIG. 8 is a cross-sectional view (a), (b) showing a process procedure of a conventional construction method.

[Explanation of symbols]

 10 PC Handrail 12 Notch 12a Notch Surface 13 Reinforcing Bar 20 PC Handrail 21 Notch 21a Notch Surface 30 Overhanging Floor 40 Laying Floor Forming Casting Form 50 Overhanging Floor 60 Laying Floor Forming Casting Form 100 PC Handrail 200 PC handrail 300 overhanging floor 500 overhanging floor

Claims (5)

[Claims] 1. The concrete handrails of the window balconies of the concrete building and the floor balconies are provided in separate Ps.
A method for constructing a concrete balcony, which is formed by joining C (precast concrete) handrails to each other, and the overhanging floor portions of both balconies are formed simultaneously with the floor slab of the concrete building and the concrete of the wall. When installing a casting formwork for forming a floor slab of a concrete building, a PC handrail for a floor balcony is installed on the overhanging formwork for forming a floor balcony, which is provided together with the casting formwork for forming a floor slab. At the same time, the floor slab and the overhanging floor of the floor balcony are simultaneously cast to form a floor balcony, and thereafter, a wall forming casting form and a floor slab forming placement form on the floor immediately above are formed. When installing both molds, PC handrail for window balconies is installed in the projecting form for forming overhanging floors for window balconies, which is provided together with the wall forming mortar Installed while being joined to the PC handrail for the floor balcony, the floor slab on the wall and the floor directly above and the overhanging floor for the window-front balcony were simultaneously cast to connect the PC handrails to each other. A PC construction method for a concrete balcony, which comprises forming a floor balcony and a window balcony. 2. PC handrail for window and PC for floor balcony
Installation of handrails on the casting formwork for forming the overhanging floor is performed by the above-mentioned floor balcony PC handrail and window-front balcony PC
Notches having an inverted L-shaped cross section having a notch height corresponding to the overhang floor thickness are provided at the joints of the handrails with the corresponding overhang floors, and the notch portions of both the PC handrails are respectively provided. While biting on the handrail installation end side of the corresponding overhanging floor forming casting form,
The concrete balcony PC according to claim 1, which is carried out by placing it on a support material for a casting formwork.
Chemical construction method. 3. A PC for a window handrail and a PC for a floor balcony
When installing the handrail on the projecting form for forming the overhanging floor, the above-mentioned floor balcony PC handrail and window-front balcony PC
The connecting rebar projecting at the joint part of the handrail with the overhanging floor or the wall is connected to the overhanging floor reinforcing rebar or the wall reinforcing rebar, respectively.
PC construction method of concrete balcony described in. 4. The concrete handrails of the window balconies of the concrete building and the floor balconies are respectively provided with different Ps.
A method for constructing a concrete balcony in which C (precast concrete) handrails are joined together, and the overhanging floor portions of both balconies are simultaneously cast with the floor slab of the concrete building and the concrete of the wall, wherein Both overhanging floors of the window balcony and the floor balcony,
The floor slab and the wall of the concrete building are simultaneously formed by concrete casting, and then, at the handrail installation ends of the two overhanging floors, the corresponding PC handrails for window balconies or PC handrails for floor balconies are provided. Is attached while joining the above-mentioned PC handrails to each other to form a floor balcony and a window-front balcony in which the PC handrails are connected to each other, and a PC construction method for a concrete balcony. 5. A PC handrail for a window and a PC for a floor balcony
The handrail is attached to the overhanging floor or the wall by attaching either the PC handrail to the overhanging floor or the wall, or the side of the overhanging floor or wall where the PC handrail is attached. The mounting bolts are projected, and the bolt holes for the bolts are provided on the other side.The bolts on one side are passed through the bolt holes on the other side to tighten the nuts, and then the bolt connecting portion. 5. The concrete balcony according to claim 4, wherein the joint is jointed between the mounting end side of the PC handrail and the side to which the PC handrail is attached, while the grout is filled into the grout. PC
Chemical construction method.