JP3410855B2 - Joint structure of PC concrete foundation - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure for PC concrete members mainly used for joining prefabricated foundations.

[0002]

2. Description of the Related Art In a case where a cloth foundation of a building is molded with PC concrete (precast concrete) and is installed on site, it is necessary to connect the installed PC concrete members to each other.
Connections were made by using different types of joint fittings depending on the shape of each concrete member with or without a notch at each joint end.

[0003]

In the prior art as described above, it is necessary to prepare different kinds of joint fittings depending on whether the joint end of the concrete foundation to be joined has a notch or not. However, the cost is high.

Therefore, it is an object of the present invention to enable the joining of concrete members with similar joining hardware, regardless of whether or not each joining end of the concrete members joined together has a notch. The present invention is to provide a PC concrete foundation joining method and a metal fitting that can reduce costs.

[0005]

According to the present invention, in a PC concrete foundation formed by a plurality of PC concrete members, the upper ends of the PC concrete members joined in a straight line are joined together at the end faces joined together. Half of the same side is cut away, and at the right angle to each PC concrete member, another concrete member,
A substantially L-shaped metal fitting is used so that the notch faces the end surface to be joined, and the same metal fitting as described above is turned upside down to form a concrete member having no notch. The joining structure of PC concrete foundation is characterized in that the joined ends are joined together.

Further, according to the present invention, the metal fitting includes a support portion,
The supporting portion has a horizontal portion that is bent at a right angle and continues, and each concrete member that is joined in a straight line is joined to another concrete member by connecting the horizontal portion from the supporting portion. With the lower part also in the lower side, the surface of the horizontal part facing away from the support part is brought into contact with and fixed to the bottom part of the notch, and the support part is fixed to the end part of another concrete member. , The metal fittings are attached, and when the joint ends of the respective concrete members in which the notches are not formed are joined, with the horizontal portion being above the support portion, the support portion of the horizontal portion is provided. The metal fitting is characterized in that the metal fitting is attached by abutting the surface on the side close to the above to the upper surface of the end of one concrete member and fixing it, and fixing the support part to the end of the other concrete member. That.

[0007]

According to the present invention, a notch is provided at each joint end of the concrete members connected in a straight line, and another concrete member is exposed so that the end face to be joined faces the notch. However, even in the T-shaped joint that is joined at a right angle to each of the PC concrete members, the joint ends that are not formed with notches are connected together,
For example, even in the L-shaped joint portion, regardless of whether there is a notch or not, the substantially L-shaped metal fitting can be used by reversing the front and back to be joined using the same kind of metal fitting.

[0008]

FIG. 1 is an exploded perspective view showing a PC concrete foundation (1) for explaining a joint portion without a notch according to an embodiment of the present invention, and FIG. PC
3 is a perspective view showing a concrete foundation (1), FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a sectional view of FIG.

Each P forming the PC concrete foundation (1)
Each of the C concrete members (2) and (3) is composed of a footing portion (not shown) buried in the soil, and cloth portions (4) and (5) rising from the center of the footing portion.

(6) is a pipe-shaped embedded nut having an internal thread on its inner peripheral surface, and these nuts (6) are
It is embedded in advance on the end faces of the cloth portions (4) and (5). The embedded nut (6) has, for example, a rebar having a different diameter and a screw hole, or an anchor bar (8) attached to the rear portion of the long nut as shown in FIG. Is used.

The metal fitting (9) is formed in a substantially L shape,
It has a support portion (10) extending in the up-down direction and a horizontal portion (11) which is bent at a substantially right angle to be continuous with one end portion of the support portion (10). The horizontal portion (11) is formed in a triangular shape, and three insertion holes (12) are provided near the corners. Of these three insertion holes (12), the insertion hole provided on the tip side
The bolt (13) inserted in (12) is attached to the upper surface (5a) of the cloth part (5).
Bolts that are screwed into corresponding nuts (6) that are embedded in the holes and that are inserted into the insertion holes (12) formed in the support part (10).
(13) is a nut (6) embedded in the end surface (4a) of the cloth part (4)
The metal fittings (9) are fixed to the concrete members (2) and (3) so as to connect the joint ends to each other.

In this way, the metal fitting (9) has the horizontal portion (11).
To the upper side of the support part (10), and the support part of the horizontal part (11)
The surface (11a) close to (10) is the upper surface (5a) of the cloth part (5).
The concrete members (2) and (3) arranged in an L shape are connected to each other in a state of abutting against each other.

FIG. 5 is an exploded perspective view showing a PC concrete foundation (1) for explaining a joint portion provided with a notch according to an embodiment of the present invention, and FIG. 6 is a perspective view of FIG. PC
It is a perspective view which shows a concrete foundation (1), FIG. 7 is a top view of FIG. 6, and FIG. 8 is a sectional view of FIG.

Concrete members connected in a straight line
The upper ends of the cloth portions (24) and (25) of the (21) and (22) are notched in half on the same side in the end faces joined to each other. Nuts (6) (6) ... Are embedded in advance in the notches (27) (27), and among these nuts (6) (6) ..., the nuts (6) that are provided so as to face each other. The connecting bolts (28) and (28) are fitted into (6), respectively. By the action of these nuts (6) (6), connecting bolts (28) (28) and long nuts (29) screwed to these connecting bolts (28) (28), each concrete member ( 21) and (22) are connected in a direction in which they are tightly connected to each other. And, at right angles to each concrete member (21) (22),
Another concrete member (23) is connected so that the joint end face (26a) of the cloth portion (26) faces the notch (27).
In this way, at the T-shaped joint, concrete members
Each concrete member (21) (2) that connects (23) in a straight line
The metal fittings similar to those in FIGS. 1 to 4 described above for joining to 2)
Reverse (9) and use. That is, the horizontal portion (11) of the metal fitting (9) is located below the support portion (10), and the surface (11b) of the horizontal portion (11) facing away from the support portion (10) faces this surface. The inner peripheral surface forming the cutout (27). Then, the bolt (13) inserted through the insertion hole (12) formed in the support portion (10).
Is screwed into a nut (6) embedded in the end surface (26a) of the cloth portion (26) of the concrete member (23) and inserted into an insertion hole (12) formed at the tip side of the horizontal portion (11). Threaded bolt (30)
The lower end of the corresponding nut is embedded in the notch (27)
It is screwed to (6) and then the nut is attached to this through bolt (30).
The metal fitting (9) is fixed by screwing (31).

[0015]

As described above, according to the present invention, the substantially L-shaped metal fittings are used upside down regardless of whether or not each PC concrete member forming the PC concrete foundation has a notch. By doing so, since it is made possible to join, there is no need to facilitate metal fittings of different types, and cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a PC concrete foundation (1) for explaining a joint portion without a notch according to an embodiment of the present invention.

2 is a perspective view showing the PC concrete foundation (1) of FIG. 1. FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a sectional view of FIG.

FIG. 5 is an exploded perspective view showing a PC concrete foundation (1) for explaining a joint portion provided with a notch according to an embodiment of the present invention.

6 is a perspective view showing the PC concrete foundation (1) of FIG. 5. FIG.

FIG. 7 is a plan view of FIG.

8 is a cross-sectional view of FIG.

[Explanation of symbols]

(1) PC concrete foundation (2) (3) (21) (22) (23) PC concrete member (6) Embedded nut (9) Hardware (27) Notch

Claims (2)

(57) [Claims] 1. In a PC concrete foundation formed by a plurality of PC concrete members, the upper end of each PC concrete member that is joined in a straight line is notched in half on the same side in the end faces that are joined together. Another concrete member is joined at a right angle to each of the PC concrete members by using a substantially L-shaped metal fitting so that the notch faces the end face to be joined, and further, A joint structure for a PC concrete foundation, characterized in that the same metal parts as those in (1) are turned upside down to join the joined ends of the concrete members having no notches formed to each other. 2. The metal fitting has a supporting portion and a horizontal portion that is bent at a right angle to the supporting portion and is continuous with the supporting portion. Each concrete member joined in the straight line is provided with another concrete member. In joining, the surface of the horizontal portion on the side separated from the support portion is abutted and fixed to the bottom portion of the notch with the horizontal portion being below the support portion, and the support portion Is fixed to the end of another concrete member, the metal fitting is attached, and further, when the joint end of each concrete member in which a notch is not formed is joined, the horizontal portion is separated from the support portion. Also on the upper side, the surface of the horizontal part close to the support part is abutted and fixed to the upper surface of the end of one concrete member, and the support part is fixed to the end of the other concrete member. Fix it, Junction structure of PC concrete foundation according to claim 1, wherein the serial bracket is attached.