JP3838548B2 - Standing method of reinforcing bars on the pile head end plate of ready-made concrete piles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stand設方Method reinforcing rebar to pile head end plate of prefabricated concrete piles.
[0002]
[Prior art]
When constructing a structure using ready-made concrete piles, multiple reinforcing bars are erected on the pile heads of multiple ready-made concrete piles placed on the ground. Is arranged.
Then, concrete is placed on the pile heads of the plurality of ready-made concrete piles, and the foundation concrete connected to the plurality of ready-made concrete piles through the reinforcing reinforcing bars and the reinforcing bars for the foundation is constructed, and the structure is the foundation. Built on concrete.
[0003]
Thus, the standing work to the pile head of the reinforcing steel for connecting a ready-made concrete pile and foundation concrete is performed as follows.
That is, a plurality of screw holes are provided in the pile head end plate of the ready-made concrete pile, a male screw is provided at the lower end of each reinforcing bar, and the male screw of the reinforcing bar is screwed into the screw hole of the pile head end plate. Reinforcing bars are erected in
Therefore, when standing the male thread of the reinforcing bar on the pile head end plate, it is necessary to manually rotate the rod-shaped reinforcing bar in order to make a screw connection. Conventionally, the reinforcing bar has to be erected manually by an operator. It was made.
[0004]
[Problems to be solved by the invention]
For this reason, conventionally, this type of reinforcing bar installation work has been labor intensive because workers have to bend over, and the male screw at the lower end of the reinforcing bar has to be tightened over the entire length of the screw hole in the pile head end plate. Therefore, it takes time to tighten one reinforcing bar, and there is a problem that the working efficiency cannot be increased.
In particular, when the structure is enlarged, the number of ready-made concrete piles to be used increases, and the diameter of each ready-made concrete pile increases, so the number of reinforcing bars erected on each pile head end plate also increases. For this reason, the number of reinforcing bars to be erected has increased dramatically, requiring many personnel and labor only for the erection work of the reinforcing bars, and the appearance of some improvement measures has been desired.
The present invention has been devised in view of the above circumstances, and the object of the present invention is to make a pile head of a ready-made concrete pile that can easily and reliably reinforced reinforcing bars on a pile head end plate in an easy posture. An object of the present invention is to provide a method for standing reinforcing bars on end plates.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is a method of standing a reinforcing bar on a pile head end plate by screwing a male screw at the lower end of the reinforcing bar into a screw hole of a pile head end plate of a ready-made concrete pile. A male screw different from the male screw is formed at the upper end of the reinforcing reinforcing bar, the valley diameter thereof is formed to be smaller than the diameter of the round bar portion of the reinforcing reinforcing bar, and a nut is screwed onto the male screw at the upper end of the reinforcing reinforcing bar. combined, characterized in that as screwing the lower end of the external thread of reinforcing rebar into the screw hole of the pile head end plate by rotating the nut from the powered fastener.
[0006]
According to the method for erecting a reinforcing bar on a pile head end plate of a ready-made concrete pile according to the present invention, the conventional manual reinforcement of a rod-shaped reinforcing bar performed when standing the reinforcing bar on a pile head end plate is performed. Dynamic operation can be performed with nuts and power clamps located above the pile head end plate, and the reinforcing bar is erected on the pile head end plate easily and securely in an easy posture. It becomes possible.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a reinforcing reinforcing bar standing method according to the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing the relationship between ready-made concrete piles, reinforcing reinforcing bars and foundation concrete, FIG. 2 is an explanatory diagram of reinforcing reinforcing bars, and FIG. 3 is an explanatory diagram at the time of standing reinforcing reinforcing bars.
As shown in FIG. 1, when constructing a structure using ready-made concrete piles 12, a plurality of reinforcing bars 14 are erected on pile heads 12A of the plurality of ready-made concrete piles 12 placed on the ground G. In addition, the reinforcing bars for the foundation are arranged on the pile head 12A, and then concrete is placed on the pile head 12A of each ready-made concrete pile 12, via the reinforcing reinforcement 14 and the reinforcing bars for the foundation. A foundation concrete 16 connected to the ready-made concrete pile 12 is constructed, and a structure is constructed on the foundation concrete 16.
[0008]
Wherein the pile head 12A of prefabricated concrete piles 12, that is fixed with steel ring-shaped pile head end plate 20.
A plurality of screw holes 22 are formed in the pile head end plate 20 at equal intervals in the circumferential direction, as shown in FIG.
[0009]
The reinforcing reinforcing bar 14 used in the present embodiment is a deformed reinforcing bar, and, as shown in FIG. 2, male screws 32 and 34 are formed at both ends in the longitudinal direction.
One of the male screws 32, 34 is provided so as to be able to be screwed into the screw hole 22 of the pile head end plate 20.
As shown in FIGS. 1 and 3, the other male screw 34 of the male screws 32, 34 is provided so as to be screwable with the nut 36, and is formed with a length slightly larger than the nut 36. Yes. A commercially available product can be used as the nut 36. Further, the other male screw 34 is formed so that the valley diameter thereof is slightly smaller than the diameter of the round bar portion 1402 of the reinforcing reinforcing bar 14 so that the nut 36 is fastened and fixed.
In the present embodiment, the male screws 32 and 34 have the same shape and the same size, and the lengths thereof are both longer by about 5 mm than the thickness of the pile head end plate 20.
[0010]
Next, a method for erecting the reinforcing reinforcing bars 14 will be described with reference to FIG.
Before construction of the ready-made concrete pile 12, the screw hole 22 of the pile head end plate 20 of the ready-made concrete pile 12 is used by using an appropriate material such as gummed tape or a cap so that earth and sand and soil cement are not clogged. Take care.
If the ready-made concrete pile 12 is placed on the ground G, flooring (or discarding) is performed, then the pile head end plate 20 is cleaned, and the curing material such as gum tape and cap is removed from the screw holes 22. The screw hole 22 is cleaned. If earth and sand or soil cement is clogged, clean them using a wire brush and blower so as not to damage the threads.
[0011]
On the other hand, a nut 36 is screwed into the male thread 34 of each reinforcing bar 14 in advance. Thereby, the nut 36 is provided at the end of the reinforcing steel bar 14 coaxially with the reinforcing steel bar 14.
Then, the reinforcing bar 14 is screwed into the predetermined screw hole 22 of the pile head end plate 20 with the nut 36 facing upward and the lower end male screw 32. In the present embodiment, this screwing operation is performed manually, and the male screw 32 has, for example, a thickness of the pile head end plate 20 to the extent that the standing state can be maintained with respect to the pile head end plate 20. Screw about half way.
[0012]
Next, using an electric or pneumatic power clamp 40 such as an electric impact wrench, the nut engaging portion 40A of the power clamp 40 is engaged with the nut 36, while paying attention to the vertical accuracy, The reinforcing reinforcing bar 14 screwed to such an extent that the standing state can be maintained in the screw hole 22 is rotated by the power type fastening tool 40, and the male screw 32 of the reinforcing reinforcing bar 14 is screwed into the screw hole 22. In this case, of course, the male screw 32 of the reinforcing reinforcing bar 14 may be fastened and fixed to the screw hole 22. Depending on the power type fastening tool 40 to be used, the operation of screwing the male screw 32 of the reinforcing reinforcing bar 14 into the screw hole 22 of the pile head end plate 20 can be carried out from the beginning with the power type fastening tool 40. is there.
Then, it is visually confirmed that the external thread portion 32A exposed on the upper surface of the pile head end plate 20 is about 5 mm or less, that is, it is visually confirmed that the external thread 32 is screwed over the entire length of the screw hole 22. Then, a force is applied to the nut 36 in the horizontal direction by hand, and it is confirmed that there is no slack in the connection state between the screw hole 22 and the male screw 32, and the operation is finished.
[0013]
According to the present embodiment, the operation of screwing the male screw 32 of the reinforcing reinforcing bar 14 into the screw hole 22 of the pile head end plate 20 can be performed by the nut 36 and the power type fastening tool 40, and the nut 36 is Since it is located above the end plate 20, conventionally, the labor-intensive labor of manually bending the bar-shaped reinforcing steel bar 14 until the male screw 32 is screwed over the entire length of the screw hole 22 and manually rotating it. The working time required for the rotation of the reinforcing bar 14 can be greatly reduced, and the reinforcing bar 14 can be erected on the pile head end plate 20 easily and reliably in an easy posture. The efficiency of this type of work can be greatly increased.
Therefore, especially when the structure is enlarged, the number of ready-made concrete piles 12 to be used is increased and the diameter of each ready-made concrete pile 12 is increased, so that the pile head end plates 20 are erected. The number of reinforcing bars 14 is also increased, and therefore the number of reinforcing bars 14 to be erected increases dramatically. Therefore, when the present invention is applied to such an enlarged structure, the effect is further increased. Become prominent.
[0015]
【The invention's effect】
As is clear from the above description, according to the method for erecting a reinforcing bar on the pile head end plate of the ready-made concrete pile of the present invention, the conventional manual rotation operation of the bar-shaped reinforcing bar is a power type. It becomes possible to perform using a tightening tool, and it is possible to easily and surely set up reinforcing bars on the pile head end plate in an easy posture, especially the increase in the number of reinforcing bars It is more advantageous when constructing such a structure.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a relationship diagram of ready-made concrete piles, reinforcing steel bars, and foundation concrete.
FIG. 2 is an explanatory diagram of reinforcing reinforcing bars.
FIG. 3 is an explanatory view when a reinforcing bar is erected.
[Explanation of symbols]
12 Ready-made concrete pile 14 Reinforcement reinforcing bar 16 Foundation concrete 20 Pile head end plate 22 Screw holes 32, 34 Male screw 36 Nut

Claims (2)

It is a method of standing a reinforcing bar on a pile head end plate by screwing a male screw at the lower end of the reinforcing bar into a screw hole of a pile head end plate of a ready-made concrete pile,
A male screw different from the male screw is formed at the upper end of the reinforcing reinforcing bar, and the valley diameter thereof is formed with a size smaller than the diameter of the round bar portion of the reinforcing reinforcing bar ,
A nut is screwed into the male screw at the upper end of the reinforcing bar,
By rotating the nut from the power-type fastening tool, the male screw at the lower end of the reinforcing reinforcing bar was screwed into the screw hole of the pile head end plate.
The standing method of the reinforcement reinforcing bar to the pile head end plate of the ready-made concrete pile characterized by the above-mentioned.   Before turning the nut from the power-type fastener, the male screw at the lower end of the reinforcing bar is screwed into the screw hole of the pile head end plate by hand so that the standing state of the reinforcing bar can be maintained. The method for erecting reinforcing bars on a pile head end plate of a ready-made concrete pile according to claim 1.

Images