JP2676467B2 - Connection structure of partition plate and reinforcing bar of underground continuous wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of a partition plate of a continuous underground wall and a reinforcing bar.

[0002]

2. Description of the Related Art As is well known, an underground continuous wall formed as a continuous panel made of reinforced concrete has a horizontally long excavation groove formed in the ground, a reinforcing bar cage is inserted into the excavation hole, and then concrete is excavated. The reinforced concrete preceding panel is formed in the ground by being poured into the inside, and the concrete single panel is used as a unit element and connected sequentially.

FIGS. 3 to 5 explain the construction of such an underground continuous wall, in which 1 is a leading element, 2 is a trailing element, and a partition plate 3 as a form is incorporated at the rear end portion. If the rebar cage 4 is set in the excavation hole on the side of the preceding element 1 and concrete 6 is placed on the side of the preceding element 1, the concrete 6 is stopped by the partition plate 3.

Next, as shown in FIG. 4, the trailing element 2 side is excavated, and as shown in FIG.
If the reinforced basket 4 is set in the and the concrete is placed (not shown), a continuous reinforced concrete wall on the leading element 1 side and the trailing element 2 side can be obtained in the ground.

By the way, FIG. 2 shows the details of the reinforcing bar basket 4 in which the partition plate 3 as a form is incorporated at the rear end. The reinforcing bar basket 4 is composed of a combination of horizontal bars 4a and vertical bars 4b. A steel plate is used as the plate 3, and a joint piece 5 for a joint is provided as a vertical member on the back surface of the plate 3.

Further, the partition plate 3 has angle members 7 at both left and right ends which are bent in a hook shape toward the preceding element 1 side.
In the center of the front surface, an H-shaped steel 8 is also provided as a vertical member.

In order to attach the partition plate 3 to the end portion of the reinforcing bar basket 4 in this way, the tip end of the horizontal bar 4a is placed on the joining piece 5.
This part is welded as a joint.

[0008]

In the structure for attaching the partition plate 3 to the reinforcing bar basket 4 by welding shown in FIG. 2, a large number of welding points are produced, and the work and management thereof are troublesome and time-consuming.

An object of the present invention is to eliminate the disadvantages of the conventional example, and to provide a convenient connecting structure for a partition plate of a continuous underground wall and a reinforcing bar, by which the partition plate can be easily and surely attached to the reinforcing bar basket. Especially.

[0010]

According to the present invention, when a partition plate is provided at the end of a reinforcing bar cage to achieve the above object,
The partition plate is provided with an insertion hole, the lateral bar end having the screw structure of the reinforcing bar basket is projected through the partition plate through this insertion hole, and the partition plate is screwed to the lateral bar end to fasten the partition plate with two nuts. The idea is to sandwich and fix.

[0011]

According to the present invention, the partition plate can be fixed to the end of the basket of the reinforcing bar by simply fastening it with nuts without the need for welding. Therefore, only the work of the reinforcing bar is required and no welding is required. . In the fastening operation with the nut, one of the two nuts to be brought into contact with the back side of the partition plate is previously fitted to the end of the lateral streak, and if the tip of the lateral streak is penetrated through the partition plate, the protrusion to the front side It is made by fitting the other nut to and fixing the partition plate with these two nuts. In this way, the nut can be fastened without turning the horizontal bar itself, which is convenient. Further, on the front and rear surfaces of the partition plate, the nuts project to cause unevenness, and serve as shear connectors to enhance the adhesion to concrete. As a result, the connection between the partition plate of the leading element and the concrete of the trailing element is strengthened, and the integration of the panel can be expected more.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional plan view of an essential part showing an embodiment of a connecting structure of a partition plate of an underground continuous wall and a reinforcing bar of the present invention, in which the same components as those of FIG. It was done.

That is, in the drawing, reference numeral 1 denotes a leading element, and 2 denotes a trailing element.
Is the same as that of the conventional example.

According to the present invention, the partition plate 3 is provided with an insertion hole 3a, while the reinforcing bar basket 4 has a horizontal bar 4a and a vertical bar 4.
The horizontal bar 4a has a screw structure 9 at least at the end.

The end of the horizontal bar 4a, which is the screw structure 9 of the reinforcing bar basket 4 as described above, is divided into the partition plate 3 through the insertion hole 3a.
The nut 10 was screwed to the front and rear of the partition plate 3 and fastened. Of the nuts 10, one that comes into contact with the back side of the partition plate 3 is fitted in the end in advance, and if the tip of the horizontal streak 4a is penetrated through the partition plate 3, the other nut 10 will be formed on the front side protruding portion. Then, the partition plate 3 is sandwiched and fixed by these two nuts 10.

In this embodiment, the partition plate 3 is made of a steel plate. As in the conventional case, the left and right ends of the partition plate 3 are angle members 7 that are bent in a hook shape toward the leading element 1 side, and the H-shaped steel 8 is formed at the center of the front surface. Although it is provided as a vertical member, other materials may be used as long as they have a strength that can be stopped when the concrete 6 is placed on the preceding element 1 side. It is conceivable that the partition plate 3 is made of a precast concrete plate or a synthetic resin plate.

In the case of using the above material, if a nut or the like is embedded in the insertion hole portion at the time of making the material, the reinforcing bar can be screwed in the insertion hole, and the work for attaching the nut is also eliminated.

[0018]

As described above, the connecting structure of the partition plate of the underground continuous wall and the reinforcing bar of the present invention is easy and reliable to attach the partition plate to the reinforcing bar basket and is convenient.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of essential parts showing an embodiment of a joint structure of a partition plate of an underground continuous wall and a reinforcing bar of the present invention.

FIG. 2 is a cross-sectional plan view of a main part showing a conventional example.

FIG. 3 is a cross-sectional plan view showing a first step of construction of an underground continuous wall.

FIG. 4 is a cross-sectional plan view showing a second step of construction of an underground continuous wall.

FIG. 5 is a cross-sectional plan view showing a third step of constructing an underground continuous wall.

[Explanation of symbols]

 1 ... Leading element 2 ... Trailing element 3 ... Partition plate 3a ... Insertion hole 4 ... Reinforcing bar cage 4a ... Horizontal bar 4b ... Vertical bar 5 ... Joining piece 6 ... Concrete 7 ... Angle material 8 ... H-shaped steel 9 ... Screw structure 10 ... Nut

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuaki Yoshimura 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd., Tokyo Branch (72) Inventor Masaru Ichikawa 1-3, Moto-Akasaka, Minato-ku, Tokyo No. 8 Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Mikiya Miyauchi 1-3 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (56) References: 57-56827 (JP, U)

Claims (1)

(57) [Claims] 1. When a partition plate is provided at the end of a reinforcing bar basket, an insertion hole is provided in the partition plate, and a lateral bar end having a screw structure of the reinforcing bar basket is projected through the partition plate through the insertion hole.
A connecting structure of a partition plate and a reinforcing bar of an underground continuous wall, characterized in that the partition plate is sandwiched and fixed by two nuts screwed and fastened to the ends of the horizontal bars.