JPH0542544B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for producing cantilevered concrete structures such as cantilevered concrete slabs, which are typified by the balconies and balconies of housing complexes, hotels, and hospitals. After assembling the formwork for creating a cantilevered concrete structure at a location such as on the ground that is different from the location where the cantilevered concrete structure will be created, it is transported to the location where the cantilevered concrete structure will be created and supported. A method of making a cantilevered concrete structure.

[Conventional technology]

When manufacturing the above-mentioned cantilevered concrete structure, it is necessary to carry out work on the cantilevered concrete structure such as return form work, concrete pouring work, and exterior work after demolding. It is necessary to erect scaffolding outside the body construction area.
Conventionally, a method has been adopted in which the formwork is carried into a concrete structure fabrication location and supported, and then scaffolding is assembled to the formwork. In addition, even when producing a cantilever concrete structure by adopting a method of constructing the formwork by transporting the constituent materials of the formwork to the place where the cantilever concrete structure is to be produced and assembling and supporting them, As seen in Publication No. 103, a method was adopted in which scaffolding was assembled to formwork supported at the location where the cantilevered concrete structure was being constructed.

However, when using the above-mentioned conventional means, the scaffolding is assembled in space-restricted locations such as the concrete structure fabrication location, which results in poor assembly workability.Especially when working at heights, scaffolding frames and scaffolding Not only does it take time to bring in the scaffolding's components, such as boards, but it also takes time to take safety measures, and it is difficult to ensure accurate installation.

[Problem that the invention seeks to solve]

The present invention was developed in view of the above circumstances, and its purpose is to eliminate the above-mentioned conventional drawbacks.

[Means for solving problems]

The feature of the method for manufacturing a cantilever concrete structure according to the present invention, which was taken to achieve the above object, is that at least one of the scaffolds is assembled to the formwork at the formwork assembly location, and the scaffolding frame is attached to the formwork. The point is that the cantilevered concrete structure is transported to the location where the cantilevered concrete structure is manufactured. And the effects caused by it
The effects are as follows.

[Effect]

Safely install the formwork in a wide and easy-to-work area, such as on the ground, which is different from where the molded concrete structure will be made.
In addition, with a focus on assembling with good workability and transporting and supporting it to the concrete structure fabrication location, at least the scaffolding frame of the scaffold that requires installation accuracy is assembled to the formwork at the formwork assembly location, Since the formwork with the scaffolding frame is delivered to the concrete structure construction site, it is easy to level the formwork in a wide and safe area, and the scaffolding frame can be assembled to the formwork with good workability and precision. Furthermore, the number of members to be carried into the cantilevered concrete production location is reduced, making the work of carrying them in easier.

〔Effect of the invention〕

Therefore, the present invention provides a method for producing a cantilevered concrete structure, which allows scaffolding to be assembled safely, with good workability, and with high accuracy, thereby shortening the construction period as a whole. I was able to do it.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

This is a method for producing a balcony A (an example of a cantilevered concrete structure) on each floor of an apartment complex, and the formwork 1 and scaffolding 2 used therein will first be described.

As shown in FIG. 2, the formwork 1 includes a plurality of joists 1b arranged along the balcony projecting direction at appropriate intervals in the balcony width direction on two large drawers 1a extending along the balcony width direction. The weir plate 1c is placed on these joists 1b, and a plurality of pipe supports 3 are installed on the ground or on the balcony A on the lower floor so that it is located at the location where the balcony will be created. The base end portion is fixed to the beam side formwork 1' by nailing.

The scaffold 2 is composed of a plurality of pipe scaffold frames 2A arranged at appropriate intervals in the width direction of the balcony, and a steel scaffold board 2B spanned between these scaffold frames 2A. The scaffolding frame 2A is shown in FIG.
As shown in FIG. 4, it is attached to the weir plate 1c by a bolt 4 that penetrates the weir plate 1c in the thickness direction and is embedded and fixed in the cast balcony A at the center of the balcony projecting direction. A support insertion part 2 for supporting the pipe support 5 is provided below the mounting part 2a.
b, and a weir plate 1 is installed at the end of the base side of the balcony.
It has a jack insertion part 2c for inserting and mounting a screw type jack 6 which prevents swinging due to a placed load around the mounting part 2a by coming into contact with the mounting part 2a. In addition, the scaffolding frame 2A attaches the attachment part 2a to the weir plate 1c, and fixes and connects the pipe part 2d located between the attachment part 2a and the jack insertion part 2c to the main drawer 1a via the clamp fitting 7. By doing so, it is configured to be attached to the formwork 1, and in addition, by inserting the pipe support 5 into the support insertion part 2b, it is able to resist the placed load when it is attached to the formwork 1. It is configured as follows. Furthermore, when the formwork 1 is disassembled and removed, the bolts 4 of the mounting part 2a
It is configured to be installed on the balcony A in a state that resists the loading load by attaching it to the balcony A via the jack 6 and abutting the jack 6 inserted into the jack insertion part 2c against the sheath plate 1c. There is. Further, a change clamp 9 for attaching a handrail 8 is attached to the scaffolding frame 2A.

The clamp fitting 7, as shown in FIG.
A U-shaped clamp 7B that can be fixed to the main body 1a via a tightening bolt 7a is fixed to the upper end of the pipe-like main body 7A in a vertical position, and the main body 7
A change clamp 7C that can be fixed to the pipe portion 2d is fixed to the lower end of the pipe portion A.

The weir plate 1c of the attachment part 2a by the bolt 4
As shown in FIGS. 3 and 4, the means for attaching to the balcony A is to tighten and screw the insert 10 that acts as an anchor into the bolt 4 to form a cutout a (see FIG. 2) on the lower surface of the balcony A. Mengi 11
It is also a means for attaching to the weir plate 1. That is, the bolt 4 is not directly fixed to the balcony A, but is fixed to the balcony A by being screwed to the insert 10, and can be removed from the balcony A by being screwed away from the insert 10.

It should be noted that, of the weir plate 1c, a scaffold frame attachment portion 1c' to which the attachment portion 2a of the scaffold frame 2A is attached and to which the jack 6 comes into contact is configured to be separable from other portions.

Next, the procedure for manufacturing balcony A will be explained.

(1) Lay out the site 12 on the ground in a location different from where the balcony will be constructed, erect the ladder-type building frame 13 on top of it, assemble the formwork 1 on this building frame 13, and attach the scaffolding frame 2A to the formwork 1. Assemble. (1st
(See figure) (2) Hang the formwork 1 with scaffolding 2A by wire Y and transport it to the balcony construction area, and attach pipe support 3 to the balcony A that has been constructed on the ground or on the lower floor.
Each scaffolding frame 2A is supported through a group.
A pipe support 5 is inserted into the support insertion part 2b of the scaffold frame 2A to support the scaffolding frame 2A on the ground or on the balcony A prepared on the lower floor. (See Figure 2) (3) Attach the scaffolding board 2B and handrail 8 to the scaffolding frame 2A, connect it to the lower scaffolding frame 2A with the construction pipe 14, and connect the left and right construction pipes 14 to the cloth pipe 15. and then tighten the curing net 16. (See Figure 2) (4) When the poured balcony A has developed the specified strength, remove the pipe support 5, set the jacks 6, support the scaffolding frame 2A on the balcony A, and remove the formwork. 1 will be dismantled and removed in order to be used for the construction of balcony A on the upper floor. (See Figure 2) (5) Perform these steps sequentially from the lower floor to the upper floor to create balconies A on each floor and perform exterior work.

6 After completing the work, dismantle and remove scaffolding 2, etc.

[Brief explanation of drawings]

The drawings show an embodiment of the method for manufacturing a cantilevered concrete structure according to the present invention, in which FIG. 1 is a perspective view showing the assembled state of the formwork, FIG. 2 is a side view showing the assembly work at the manufacturing location, and FIG. 3 is an enlarged plan view of the main part, FIG. 4 is an enlarged longitudinal sectional side view of the main part, and FIG. 5 is an enlarged longitudinal sectional front view of the main part. 1... Formwork, A... Concrete structure, 2...
...Scaffolding, 2A...Scaffolding frame.

Claims (1)

[Claims] 1 After assembling the formwork 1 for creating a cantilevered concrete structure at a location different from the location where the cantilevered concrete structure will be created, it will be carried to the location where the cantilevered concrete structure will be created and supported to create the cantilevered concrete structure. A method for producing a body A, which comprises assembling at least a scaffolding frame 2A of the scaffolding 2 to the formwork 1 at an assembly location of the formwork 1, and then manufacturing the scaffolding frame 2A integrally with the formwork 1. A method for manufacturing a cantilevered concrete structure that is transported to the location where the cantilevered concrete structure will be manufactured.