JP3503760B2 - Method for reinforcing joint of PCa concrete plate and reinforcing bar composite - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a method for reinforcing a joint portion of PCa concrete plates arranged with their end faces butted against each other when forming a concrete floor of a building.

[0002]

2. Description of the Related Art PCa called Omnia plate (trade name)
The concrete plate is under the truss reinforcement as reinforcement inside.
Although the chord material is buried, there is no reinforcing bar between the PCa concrete plates that are lined up with their end faces abutting, so it is necessary to reinforce the joint part when placing concrete on the top surface at the site. There is.
As a conventional reinforcing method for the joint part, a large number of joint reinforcing bars are hung between both PCa concrete plates and arranged so as to be parallel to each other, and then a discard bar is provided on them in a direction along the joint part. It has been practiced to place the waste reinforcement and each of the reinforcing reinforcements, and then place the upper reinforcement as necessary to place concrete on both PCa concrete plates.

[0003]

However, in the above-mentioned conventional joint portion reinforcing method, since a large number of joint reinforcing bars are individually arranged and then the discarding reinforcement and each reinforcing reinforcement are bound, Not only is there a problem that the reinforcing bars arranged when binding with reinforcing bars are disturbed, and it takes a lot of time to bind them while fixing the disturbance, and at the construction site, the binding of the reinforcing bars and the discarding bars is done. There was also a problem that the work period was delayed because it became the work of.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and makes it possible to reduce the labor as much as possible and to connect the reinforcing bar and the discard bar in a factory. The purpose is to do.

[0005]

According to a first aspect of the present invention, there is provided a method for reinforcing a joint portion of a PCa concrete plate according to the present invention, in which the lower chord member of a truss consisting of a lower chord member, a diagonal member and an upper chord member is embedded. With the method of reinforcing the joint portion of the PCa concrete plate, the end faces of the pair of PCa concrete plates that are made to protrude from the upper surface of the diagonal member and the upper chord member are butted against each other, and joint reinforcing bars are arranged across the joint portion of the PCa concrete plate. Therefore, if a large number of joint reinforcements are arranged on the same plane in advance,
In the position of the reinforcing bar in the longitudinal direction of the reinforcing bar, the discard bar is arranged between the truss bars along both sides of the joint part.
So that it is located at one end of the reinforcing bar
Arrange them so that the reinforcement bar is completely
On one side and on the other side as a short end , to fabricate a reinforcing bar composite, and then to fabricate this reinforcing bar composite.
Both sides of the joint part of the PCa concrete board
Below the upper chord of the truss muscle along the
Insert the long end of the bar into the bottom of one of the upper chords.
The short end of each truss streak on each side
Located between the timbers, then the short end under the other upper chord
By inserting the joint reinforcing bars into the lower side of the upper chord member.

Further, in the invention described in claim 2, in the invention described in claim 1, a large number of the joint reinforcing bars having the same length are arranged in parallel on the same plane, and the discarding bars are provided in the respective It is characterized by being arranged in a direction orthogonal to the reinforcing bar. Furthermore, the invention according to claim 3 is a reinforcing bar composite used in the method for reinforcing a joint portion of a PCa concrete plate according to claim 1 or 2, wherein the reinforcing bar composite is provided from one end of the joint reinforcing bar. Is formed so that the length up to is shorter than the interval between the truss reinforcements on both sides of the joint portion.

[0007]

According to the reinforcing method of claim 1, since a large number of each joint reinforcing bar is connected to the discarding bar in advance by welding or the like to form a reinforcing bar composite, this composite is connected to the PCa connector.
Simply arranging it at the joint part of the cleat plate allows easy reinforcement, and the reinforcing bars do not move independently and the position is not disturbed. At this time, since the reinforcing bar is disposed under the upper chord member of the PCa concrete plate, the truss bar and the reinforcing bar are located above and below, so that the reinforcing effect of the joint part by the reinforcing bar becomes strong.

Further, even with a small spacing between the trusses muscle mutually along each side of the joint portion, to easily position the state where the dive the respective ends of the reinforcement under each upper chord members of both truss muscle be able to.

[0009]

1 and 2 show an embodiment of the present invention, in which the left and right PCa concrete plates 1 and 2 are PCs.
a Concrete plates 11 and 21 are constructed by truss bars 12 and 22 being planted. The truss bars 12 and 22 are lower chord members (not shown) embedded in the concrete plates 11 and 21, and the concrete chords 11 and 21 are connected to the lower chord members.
The upper chord member 12 in which the diagonal members 12a and 22a protruding upward and the upper ends of the diagonal members 12a and 22a in each row are connected in each row
b and 22b, and in this embodiment, it constitutes a concrete floor discard formwork.

The PCa concrete plates 1 and 2 are arranged such that their end faces are butted against each other, and a reinforcing bar composite 4 is arranged on the upper surface of the joint part 3. The reinforcing bar composite 4 is composed of a large number of joint reinforcing bars 41 spanning between the PCa concrete plates 1 and 2, and a discarding bar 42 for connecting the joint reinforcing bars 41. Both PCa contacts with the same length and parallel to each other
Truss streak 12, which is close to the joint portion 3 of the reed plates 1 and 2,
22 of top chord member 12b, PCa con and passes under the 22b
It extends to the center side of the cleat plates 1 and 2, and the discard bar 42 is welded orthogonally to the reinforcing bar 4a. In the reinforcing bar composite 4 of this embodiment, since two discarding bars 42 are used, the reinforcing bars 41 and the discarding bars 42 form a mesh reinforcing bar. It is suitable that there are two or a few discard bars 42, but only one if the strength of the discard bars 42 and the welding strength with the reinforcing bar 41 are sufficient.

Further, in the reinforcing bar composite 4 of this embodiment, the position of the discarding bar 42 is biased to one end in the longitudinal direction of the reinforcing bar 41, and the discarding bar 42 in the reinforcing bar 41 is The length up to the end is changed to be short or long, and one end is a long end 41a and the other is a short end 41b.
Here, for example, the length from the joint portion 3 of the PCa concrete plates 1 and 2 to the upper chord members 12b and 22b of the truss bars 12 and 22 close thereto is 210 mm (both upper chord members 12).
420mm between b and 22b), the length of the reinforcing bar 41 is 800
mm, the reinforcement bar 41, the left end to the left side of the discard bar 42 in the figure.
Up to 480 mm, 100 mm between both rebars 42, 220 mm to the short end 41b from the right rebar 42 to the right end of the reinforcing bar 41, and the rebar 41 to the end of the reinforcing bar 41 Up to at least one end side of the reinforcing bar 41, which is significantly shorter than the distance between the upper chord members 12b and 22b.

The reinforcing bar composite 4 is connected to PCa concrete.
To set it on the joint part 3 of the plates 1 and 2, use PCa
From above the joint portion 3 of the concrete plates 1 and 2, first, attach the tip of each long end portion 41a of the reinforcing bar 41 to one of the PCs.
a Under the upper chord member 12b of the truss bar 12 of the concrete plate 1, the bar is inserted in the direction away from the joint part 3 until the discard bar 42 approaches the truss bar 12. This is the state shown in FIG. Next, the short end 4 of the reinforcing bar 41
1b, and the entire reinforcing bar composite 4 is lowered until it comes close to the upper surfaces of the PCa concrete plates 1 and 2, and the state shown in FIG. 3B is obtained. Then, the tip of the short end portion 41b of the reinforcing bar 41 is on the other side. of
Upper chord member 22b of truss reinforcement 22 of PCa concrete plate 2
Slide to dive underneath. This is Figure 3
The position shown in (c), which is shown in FIGS. 1 and 2,
The reinforcing bar composite 4 is in the set state.

When the set is completed, the PCa concrete
A spacer (not shown) is interposed between the upper surfaces of the touch plates 1 and 2 and the reinforcing bar composite 4 to connect the reinforcing bar composite 4 to the PCa connector.
It may be floated slightly from chestnut over preparative plate 1, 2, PCa co
It may be directly placed on the upper surfaces of the inner and outer plates 1, 2. As described above, the reinforcing bars 41 are parallel to each other by an extremely simple operation of inserting the reinforcing bar composite 4 from the long end 41a, lowering the short end, and then sliding in the opposite direction. In addition, both of them can be set while being aligned in a state orthogonal to the joint portion 3.

Further, the PCa concrete plates 1 and 2 are
When a concrete floor is formed by using, the upper end streak 5 is placed between both PCa concrete plates 1 and 2 as shown in FIG.
After arranging, the cast-in-place concrete 6 may be cast and cured. As a result, PCa concrete board 1,
A concrete floor in which 2 and the concrete 6 are integrated is formed, and the joint portion 3 is reinforced by the reinforcing bar 41.

FIG. 4 shows the sacrificial bar 42 of the reinforcing bar composite 4,
In this example, the reinforcing bars 41 are arranged at the same distance from both ends. This is because the length from the discarding bar 42 to the end of the reinforcing bar 41 is
At both ends of the reinforcing bar 41, both upper chord members 12b, 22
This is because when the distance is significantly shorter than the distance between b, it is not necessary to provide a difference in length between both ends as in the above embodiment. Therefore, in the reinforcing bar composite 4, the upper chord member 12b or 22b may be dipped first from any end of the reinforcing bar 41. The other points are the same as the above-mentioned embodiment.

In each of the above embodiments, the PCa concrete
Although the slabs 1 and 2 have been used to construct a concrete floor, they can be used instead to construct a concrete wall and the reinforcing bar composite 4 can be applied to the joint portion thereof. At that time, if the reinforcing bar 41 set in the vertical direction is also disposed with a discard bar at a portion of the short end 41b in FIG. 2 that intersects with the truss bar 22, this will hit the truss bar 22 and reinforce it. The muscle complex 4 is positioned.

[0017]

As described above, according to the present invention, since a large number of joint reinforcing bars are connected to the discarding bar in advance by welding or the like to form a reinforcing bar composite, this composite is used as a PCa concrete plate. The reinforcement bar can be easily arranged by simply arranging it at the joint part of the above, and the position of each reinforcement bar does not move independently and the position of the reinforcement bar is not disturbed. Since it can be configured in another place such as, it is sufficient to simply dispose the reinforcing bar composite at the site, and thus the work is extremely simple. The reinforcing bar is PCa.
Since it is placed under the upper chord of the concrete plate,
Since the truss reinforcement and the reinforcement reinforcement are located above and below, there is also an effect that the reinforcement action of the joint portion by the reinforcement reinforcement is strengthened.

Further, according to the reinforcing method of claim 1 ,
In addition to the above effect, even if the distance between the truss reinforcements on both sides of the joint is small, it can be arranged by simply advancing the reinforcing bar composite from the long end of the reinforcing bar and then retracting it toward the short end. Since it can be done, there is also an effect that the bar arrangement is simple.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment.

FIG. 2 is a front view of the embodiment.

FIG. 3 is an explanatory view showing a procedure for arranging a reinforcing bar composite.

FIG. 4 is a front view of another embodiment.

[Explanation of symbols]

1, 2 PCa Concrete plates 12, 22 Truss bars 12a, 22a Diagonal members 12b, 22b Upper chord member 3 Joint part 4 Reinforcing bar composite 41 Reinforcing bar 41a Long end 41b Short end 42 Waste bar

Continuation of the front page (56) Reference JP-A-4-254644 (JP, A) JP-A-5-18111 (JP, A) Actual development Sho 59-179011 (JP, U) (58) Fields investigated (Int .Cl. ⁷ , DB name) E04B 5/32 E04B 5/38 E04B 1/04 E04B 1/16 E04G 21/12 E04G 5/00-5/20

Claims (3)

(57) [Claims] 1. A pair of PCa concrete plates, in which the lower chord member of a truss consisting of a lower chord member, a diagonal member, and an upper chord member is embedded, and the diagonal members and the upper chord member are protruded from the upper surface are butted to each other. , P for arranging the joint reinforcing bar straddling the joint part of the PCa concrete plate
A method for reinforcing a joint portion of a Ca concrete plate, wherein a large number of the joint reinforcing bars are previously arranged on the same plane.
In addition, the waste reinforcements arranged between the truss reinforcements on both sides of the joint are arranged in the longitudinal direction of the reinforcement reinforcements.
Make sure that the position is not biased to one end of the reinforcing bar.
Arranged so that the end of the reinforcing bar from the waste bar
Up to one long end and the other short end
It produced a reinforcement complex integrated as, then this accessory
The joint of the PCa concrete board and the strong muscle complex
Below the upper chord of the truss muscle along both sides of the section, initially
Extend the long end of the reinforcing bar below one of the upper chord members.
By inserting the short end of the truss on both sides
Between the upper chords of the
A method for reinforcing a joint portion of a PCa concrete plate, characterized in that both ends of the joint reinforcing bar are respectively positioned below the upper chord member by inserting the joint reinforcing bar below the material. 2. A plurality of joint reinforcing bars having the same length are arranged in parallel on the same plane, and the discarding bars are arranged in a direction orthogonal to the reinforcing bars. A method for reinforcing a joint portion of a described PCa concrete plate. 3. A reinforcing bar composite used in the method for reinforcing a joint portion of a PCa concrete plate according to claim 1, wherein a length from one end of the joint reinforcing bar to the discard bar is A reinforcing bar composite characterized in that it is formed so as to be shorter than the interval between trusses along both sides of the joint portion.