JPH026900B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement to the method of assembling concrete forms using conventional tightening separators, form ties, pipes, etc., and was developed with a particular aim of streamlining labor. It is.

As is well known, the fastening metal fittings that are often used in conventional concrete formwork construction methods require a lot of tightening work with screws, and also require a large number of fastening pipes to reinforce the form. The tightening of metal fittings between pipes was a factor that reduced work efficiency.

In addition, this conventional construction method involves work such as nailing between the formworks, which requires a lot of time and effort to process after dismantling, leading to high costs.

On the other hand, in addition to these problems with the formwork structure in conventional construction methods, the construction method involves a lot of work on site, which means that work cannot begin until the site is ready for framing, and the work period is short. The work must be done in a short period of time because the work is limited; the entire work is done at heights, so there is a lot of lifting and lowering work and there is a lot of waste in work procedures; and there is also a lot of work equipment used. This resulted in increased construction costs due to the difficulty of introducing mechanical power. Moreover, the work on site is subject to unfavorable weather conditions.
There were many factors that disrupted planning, such as construction delays, depending on the state of construction progress.

Therefore, in view of the various drawbacks of conventional construction as described above, the present invention aims to shorten the construction period by overcoming the adverse conditions at the site, and in addition, improves the conventional formwork structure that requires a lot of tightening work. Therefore, we propose a method that enables concrete pouring without the need for conventional tightening work.

Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

Figure 1 is a plan view showing a part of the concrete pouring section assembled using the method of the present invention. With 3 assembled, pillars 1 and 1 at the four corners
The area surrounded by... is filled with one large formwork 4.

The large frame body 4, as shown in FIG.
A rectangular frame with two main shafts 5, 5 made of channel-shaped steel as the long sides, and side shafts 6, 6 made of L-shaped steel as the left and right short sides, and braces 14, 14 attached to each of the four corners of this frame. and angles 8, 8 made of L-shaped steel parallel to the direction of the short side on both sides of the position corresponding to the small beam part 7, which will be described later. . Furthermore, as shown in the third diagram, a slab-type frame 10 made of a thick plate or steel plate panel is attached to the frame 9 made of these supporting materials, and a side plate 11 is attached to the opposite inner side of the angles 8, 8... A groove forming the small beam portion 7 is formed. At this time, the bottom plate (not shown) of the groove of the small beam portion 7 is not attached as a retrofitted member in the illustrated state. Next, the frame body 9 which becomes the side wall of the girder part 2
Steel plates 12 are attached to the four circumferential sides of the large formwork 4 to complete the large formwork 4. FIG. 4 shows a cross section of the completed large formwork 4 parallel to the main axis 5.

In addition, under the structure of this large formwork 4, as reinforcing means to maintain the flatness of the slab mold frame 10 attached to the frame body 9, several reinforcements are provided at intervals between the angle 8 and the side shaft 6. The main pipe is joist (main shaft 5,
5) is effective.

In order to install this large frame body 4 in the area surrounded by the large beam parts 2, 2, four fishing wires 13, 13... each having a hook-shaped hook attached to the tip thereof are used.
are attached to the formwork 4 as shown in the third figure, and then lifted up and installed using a crane or the like.The hooks are attached to the formwork 4 to attach the fishing wires 13, 13... to the formwork 4. This is done by passing through the open bottom of the small beam part 7 of the large formwork 4 and hanging it on one side of the channel steel of the main shafts 5, 5.

After the installed large formwork 4 has installed the groove bottom plate of the small beam part 7, the small beam part 7 and the slab type frame 10 are installed.
Once a steel frame has been erected on top, concrete can be poured.

In this way, while the conventional formwork assembly method combines small slab frames to construct a concrete pouring surface of a predetermined area, the formwork is assembled using form ties, pipes, separators, etc. Moreover, this framework requires screw tightening work at the construction site, which is an obstacle to improving work efficiency.Furthermore, in the steel frame pre-assembly method, assembly using screw tightening work is difficult when the work is assembled first. The work itself was difficult due to the obstruction of the steel frame, which further reduced work efficiency.
According to the construction method of the present invention, the work required at the construction site is extremely small, and the formwork can be installed at the same time as the pre-assembled steel frame is erected, which is much more efficient than before. This can be improved by about 10 times compared to that of .

The high efficiency of formwork installation essentially lies in the fact that the large formwork is assembled and processed in advance.
Processing this large formwork means that it is possible to accumulate work, and it is possible to avoid delays in construction due to inclement weather, etc. due to the fact that conventional construction methods could hardly accumulate this work, or to do a lot of work in a short period of time. It is possible to shorten the construction period by eliminating inconveniences such as being forced to do so.

Another reason for the improvement in work efficiency in the method of the present invention is that whereas the conventional formwork construction method required manual work at the construction site, mechanical power such as a truck or a crane was introduced. In addition, according to this method of construction using a crane, it is possible to shorten the time required for working at high places at the construction site, which is advantageous in that the risk of work can be reduced.

In this case, the work of lifting the formwork using a crane or the like can be carried out by hooking the fishing hook onto the bottom side of the frame material through the open bottom of the girder passage groove, without installing anchors or other mooring metal fittings. Since it is possible to do so without creating unnecessary protrusions or recesses in the formwork, it is possible to accumulate work on the formwork to which the slab mold frame has been attached in advance.

An example of the practical dimensions of the large formwork of the illustrated embodiment according to the present invention is that it is a rectangle with a long side of 9100 mm and a short side of 4000 mm. This is a structure that is installed at each location.

[Brief explanation of drawings]

Figure 1 is a plan view of the construction site using the construction method of the present invention.
Figure 2 is a perspective view showing the frame body of the large formwork in the construction method of the present invention, Figure 3 is a perspective view showing the large formwork in a suspended state in the construction method of the invention, and Figure 4 is the same completed large formwork. FIG. 1...Column, 2...Girder section, 3...Steel frame, 4...
Large formwork, 5... main shaft, 6... side shaft, 7... small beam section, 8... angle, 9... frame body, 10... slab type frame, 11... side plate, 12... rigid plate , 13...
...Fishing wire, 14...Brace.

Claims (1)

[Claims] 1. Pass the steel materials around the four sides and on both sides of the small beam passing position, and attach the four corner braces to the frame body.
A large formwork is constructed in advance by attaching the slab type frame and side plates, leaving the bottom plate of the girder through-groove so that it can be retrofitted. A method of constructing a concrete formwork, in which a fishing hook is suspended from the frame body through the bottom plate portion of the small beam passage groove, and the large formwork is placed therein.