JPS6358993B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a construction method for large-scale column-forming for buildings, and more specifically, a method for constructing concrete columns with one-time pouring of concrete for one floor using large-scale formwork. Concerning the large-assembly column formwork construction method.

Traditionally, to make frame structures such as medium-rise buildings,
Generally, metal form construction methods have been used, but because assembly and disassembly are done by hand, construction efficiency is poor and the construction period is long. For this reason, various construction methods using large-scale formwork have become popular in recent years, but in all of these construction methods, concrete for walls, columns and beams, and slabs is poured in two steps. , the installation, stripping, and movement of the large formwork for walls and columns and the installation, stripping, and movement of the large formwork for beams and slabs were carried out alternately, making the construction process complicated. The reality is that efficiency has not improved as much as expected.

On the other hand, the concrete for the first floor of the building was
When the formwork for internal columns, slabs, and beams is made into a large-scale formwork to be poured in one step, the large-scale column formwork has a depth in the building, so it must be lifted with a crane or lowered into a predetermined position. If it is not possible to do so, it will have to be dismantled into formwork panels on all four sides and transported, making it impossible to achieve the labor-saving and efficiency of building frame structures using large column formwork. .

The present invention was made in view of the above circumstances, and when the building is so deep that it is not possible to lift the large column formwork with a crane, the opening of the frame structure constructed without disassembly can be removed. This is then lifted to the upper floor using a lifting frame and lowered to the predetermined position where the column reinforcing bars are arranged, and is set so as to enclose the column reinforcing bars. After connecting to the beam side formwork that is movably supported at both the left and right ends of the beam formwork and hanging it so that it can move, concrete columns are placed inside the large column formwork with one cast of concrete for the frame. The purpose of the present invention is to provide a large-assembly column form construction method characterized by repeating the construction process to construct concrete columns for a frame structure of a required number of floors.

An embodiment of the large-assembly column formwork construction method according to the present invention will be described below.

First, the large-assembly column formwork for implementing the large-assembly column formwork of the present invention will be explained with reference to FIGS. 1 and 2. After joining a plurality of steel plate formworks with U clips,
It is a wide formwork panel reinforced with thick pieces of two square pipes in the top, middle, and bottom three tiers.The formwork panels are installed facing each other, and the sides of each formwork panel are opposite to each other. A narrow formwork panel is rotatably supported at the end. That is, angle members that abut and connect to the side ends of the wide form panel are fixed at both ends of each narrow formwork panel, and hinge plates are attached to the angle members at one end of the upper, middle, and lower three sides.
The hinge bolts are inserted into the bolt holes of each hinge plate and the long holes drilled at the end of the end pieces of the wide formwork panel and tightened, and the narrow formwork panel becomes the wide formwork panel. It is rotatably supported at the side edge of the formwork panel. Therefore,
Formwork panels on two sides of the column can be opened and closed. In addition, instead of drilling a long hole in the end of the thick piece, a long hole may be bored in the hinge plate, and a bolt hole may be bored in the end of the thick piece. After this narrow formwork panel is rotated and closed, tie bolts are tightened and tensioned between the ends of the opposite thick timbers, and the concrete is placed between the wide formwork panels facing each other. The concrete is placed in place to prevent it from spreading. Hanger attachment fittings are provided on the left and right sides of the upper half of the wide formwork panel, to which the lower end of an extendable hanger having a roller at the upper end is connected.
Using this hanger, a wide formwork panel is hung movably from the hanger rail provided at the lower end of the beam side formwork that can move forward and backward on both the left and right ends of the large slab/beam formwork (not shown). It is set as. Hanging fittings for lifting with a lifting frame, which will be described later, are installed horizontally on the outer surface of the wide formwork panel. In addition, narrow formwork panels are
Other than large column formwork placed on the exterior corner of a building, the upper end is lower than the wide formwork panel.
When set in a predetermined position, the L-shaped steel formwork at the end of the beam bottom formwork is placed in this portion.

Next, the large-assembly column form construction method of the present invention using the large-assembly column formwork having the above-mentioned configuration will be explained.

As shown in Figure 3a, the large assembled column formwork is set in a predetermined position, and the hanger rails at the lower end of the beam side formwork that can move forward and backward at both left and right ends of the large assembled slab/beam formwork that is also set in a predetermined position. First, a wide formwork panel was suspended so that it could run from the rollers at the upper end of the hanger attached to the hanger mounting bracket of the upper end thick material, and the upper end of the formwork panel was attached to the lower end of the beam side formwork. L of the end of the beam bottom formwork that is connected and placed between the large column formworks at the upper end of the narrow formwork panel.
With the shaped steel formwork 17a connected, concrete columns are constructed within the large column formwork in conjunction with one-time pouring of concrete for the first floor frame.

Next, as shown in Fig. 2, remove the tie bolts stretched between the ends of the end pieces that face each other on the outside of the narrow formwork panels, and connect each formwork panel to the end pieces through the hinge bolts. Pull it outward along the long hole and remove the corner angle that connects the L-shaped steel 17a at the end of the beam bottom formwork to both upper sides of the wide formwork panel.

Next, the hanger is extended to remove the large-assembly column form device from the mold, and the large-assembly column form is moved along the hanger rail by the rollers of the hanger to the opening of the frame structure. Similarly, each large column formwork for constructing the concrete columns of the frame structure is demolded through the above-mentioned procedure, and sequentially moved to the opening of the frame structure.

Now, for the large column formwork that has been moved to the opening, remove the lower end of the hanger from the hanger mounting bracket, and attach the hanging rope W of the lifting frame F to the hanging bracket on the outside of the formwork panel as shown by the dashed line in Figure 3C. The large-assembly column formwork is suspended by the lifting frame F, and one side of the large-assembly column formwork is connected to the frame structure B.
The narrow formwork panel opened on one side is closed and connected to the adjacent wide formwork panel with clips, etc., and then the entire large column formwork is removed using the lifting frame F. Pull it out of the frame structure B and lift it up as shown by the solid line. Then, the column reinforcing bars are arranged as shown in Figure 3d, and the kicker is moved to a predetermined position on the second floor, which is built integrally with the slab concrete of the frame structure B, and the column reinforcing bars are held inside and suspended, and pre-assembled. Place the slab on a pillow placed on the outside of the concrete slab, close the narrow formwork panel that is open on the other side, and tighten tie bolts between the ends of the end pieces facing each other on both outside sides. Finish setting by tensioning the rack. Similarly, each large column formwork is lifted up and moved to a predetermined position on the second floor and set.

Then, from inside the constructed first floor frame structure B, there is a beam bottom form, a large slab/beam form (not shown), and a beam form at the longitudinal end of the large slab/beam form (not shown). etc., and moved it to a predetermined position on the second floor and set it. Also, after demolding the external beam side formwork outside frame structure B and moved it to a predetermined position on the second floor and set it, Concrete columns are constructed and cured within each of the above-mentioned large-assembly column forms by placing concrete for the frame once. Thereafter, the above steps are repeated to construct concrete pillars on each floor as the frame structure of the required number of floors is constructed.

As can be seen from the above explanation, the large-assembly column formwork construction method of the present invention uses the opening of the frame structure constructed along the hanger rails provided at the lower end of the beam-side formwork at both ends of the large-assembly slab/beam formwork. Since the large-assembly column formwork is moved to the upper floor, it can be easily lifted up using a lifting frame and lowered to a predetermined position on the upper floor. There is no need to disassemble it into frame panels and transport it, which saves labor in constructing the frame structure and greatly improves construction efficiency.

In addition, in the large-assembly column formwork method of the present invention, the formwork panels on the two sides of the large-assembly column formwork are opened and run, so even if there are concrete columns constructed in the direction of travel, the formwork panels on the two sides are left open. It opens and allows you to avoid the concrete pillar and move to the opening of the frame structure.
Furthermore, when lifting the large column formwork to the upper floor using the lifting frame, one side of the formwork panel is closed and the opposing wide formwork panels are connected, so the large column formwork can be lifted and moved in a stable manner. Furthermore, when the large column formwork is moved to the specified position on the upper floor, it is set around the reinforcing bars that have been arranged in advance, making it extremely easy to work and greatly simplifying the setup work for constructing concrete columns. It has the effect of being able to be converted into

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the large-assembly column formwork used in the construction method of the present invention, Fig. 2 is a plan view thereof, and Figures 3 a to 3 d are diagrams showing the steps of the large-assembly column formwork method of the present invention. It is. ...wide formwork panels, ...steel formwork,
... end timber, ... narrow formwork panel, ... angle material, ... hinge plate, ... long hole,
... Hinge bolt, ... Tie bolt, ...
Hanger mounting bracket,...Roller,...Hanger,...Hanging bracket,...Large column formwork,...
Beam side formwork,...hanger rail,...beam bottom formwork, 17a...L-shaped steel formwork, 18...pillow,...
...Corner angle, ...Column reinforcing bar, ...Kitsuka, B...Main structure, F...Lifting frame, W...Hanging rope.

Claims (1)

[Scope of Claims] 1. An extendable hanger having rollers at the upper end of the hanger rail connected to the lower end of the beam-side formwork and provided outside the lower end, which is movably supported at both left and right ends of the large slab formwork. Concrete columns are constructed by pouring one-story frame concrete in one time within each large column column formwork, which is suspended so that it can be moved around, and the formwork panels on the two sides in the direction of travel can be opened and closed. rear,
The process of demolding each large-assembly column formwork, and opening the formwork panels on two sides of each large-assembly column formwork at right angles in the running direction, and running each large-assembly column formwork on a hanger rail with a hanger. The large column formwork that has been moved to the opening of the frame structure is lifted by a lifting frame, the hanger is removed, and one side of the large column column formwork is moved to the opening side of the frame structure. The process of pulling out the frame structure until it protrudes outside the frame structure, and after pulling it out until one side protrudes outside the frame structure, the open formwork panel on one side is closed and the entire large column formwork is removed. The process of pulling out the outside of the frame structure, lifting it to the second floor, lowering it so as to sandwich the reinforcing bars placed in the predetermined positions inside, and then closing and setting the open formwork panel on the other side. The assembled column formwork is connected to the lower end of the beam side formwork which is supported on both the left and right ends of the large slab/beam formwork to be set later so that it can move back and forth, and is telescopic with a hanger rail on the outside of the lower end and rollers on the upper end. A construction method for building large column columns, which is characterized by constructing concrete columns of a frame structure having a required number of floors by repeating various steps of suspending them so that they can be moved using hangers.