JPH09203031A - Joint material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint material having a hardness and a light weight without breakage on pressing-in it, by providing a front end member which is not broken even when it is pressed in RCD concrete and a nonmetallic sheet connected to the front end member SOLUTION: A long galvanized steel sheet is bent to make a J-shape and form the front end member 11, in a joint material 10. A sheet material 12 is fixed along the longer side of the front end member 11 with rivets 13 or the like. In this time, the sheet material 12 is fitted so as to be involved between the inside face of the front end member 11 and the blade and pressed in a specified depth of the concrete for RCD while vibrating the blade. In this way, when the weight of the joint material 10 is lightened and a flexible sheet material 12 is used, the joint material can be easily handled on hauling it by folding and rolling it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint material for forming a lateral joint of a dam constructed by the RCD method.

[0002]

2. Description of the Related Art The RCD method includes the steps of laying concrete for RCD with a bulldozer, leveling it, then forming a horizontal joint with a vibrating joint cutting machine, and compacting it with a vibrating roller. Joint material 2 as shown in
It is constructed using 0. That is, the joint material 20 is
It is formed by using a metal plate such as an iron plate, a stainless steel plate, or a zinc-plated iron plate so as to have a bent portion 20a on the end side, and the size of each piece is approximately 0.27 in thickness x width x depth.
It is about mm x (90 to 100 cm) x (40 to 100 cm). As shown in FIG. 4 (a), the vibrating joint cutting machine includes a base machine 30 such as a hydraulic excavator, a vibrator 32 provided at a tip of an arm 31 extending from the base machine 30, and a vibrating machine 32. It is formed so as to include a blade 33 provided at the lower end. In order to create the horizontal joint, first, the joint material 20 is bent into the bent portion 2 as shown in Fig. 4 (a).
It is attached to the lower end of the blade 33 of the vibrating joint cutting machine at 0a, and is press-fitted into the RCD concrete while being vibrated by the vibrator 32 as shown in FIG. Will be carried out.

[0003]

As described above, since the conventional joint material is entirely formed of a metal plate, the weight per piece is large and it is not easy to handle.
There is a problem that the number of sheets that can be transported to the construction site at one time is limited.

In order to solve this problem, it has been proposed to form the above-mentioned joint material with a vinyl chloride board to reduce the weight, and the construction was carried out on a trial basis. However, the joint plate formed of this vinyl chloride plate has a problem that when it is pressed into RCD concrete with a blade, it is easily worn and easily broken, and a horizontal joint cannot be formed reliably.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a joint material having a hardness that does not break during press-fitting into RCD concrete and a weight. It is in.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above objects, and its gist is a joint material for forming a lateral joint of a dam constructed by the RCD method, which is used for RCD. A joint material is provided with a tip member having a hardness that does not break even when press-fitted into concrete, and a non-metallic sheet continuous with the tip member.

In the joint material of the present invention, the tip member can be formed of a material having a strength that does not break even when pressed into RCD concrete, for example, a resin or a metallic material reinforced with carbon fiber. As such a metallic material, for example, an iron plate, a zinc-plated iron plate or a stainless steel plate can be used. Further, the tip member is
It may be formed by bending so that it can be hung on the blade of the vibrating joint cutting machine. For example, its cross-sectional shape is formed into a substantially “J” shape, a substantially “V” shape, or a substantially “U” shape. be able to.

In the joint material of the present invention, as the non-metallic sheet, for example, a flexible sheet made of polyvinyl chloride or high density polyethylene can be used. Here, if a flexible sheet is used as the non-metallic sheet, it can be folded or rolled, and therefore, there is an advantage that handling during transportation becomes easy.

[0009]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a joint material 10 of the present invention, and FIG. 2 is a side sectional view of the joint material 10 hung on the lower end of a blade of a vibrating joint cutting machine. In FIG. 1, joint material 1
0 is formed of a tip member 11 formed by bending a long zinc-ironed iron plate into a “J” shape, and a sheet material 12 fixed along a long side of the tip member 11 with a rivet 13 or the like.

Here, the sheet material 12 is obtained by cutting a flexible sheet of polyvinyl chloride or the like into a substantially rectangular shape, bending one side thereof, and fixing it to the long side of the tip member 11.
By bending and fixing the sheet material 12 in this way, as shown in FIG. 2, when the joint material 10 is attached to the blade 33 of the vibrating joint cutting machine, the sheet material is provided between the tip member 11 and the blade 33. 12 can be smoothly rolled in, and it is possible to prevent the fixed portion (rivet 13) from breaking at the time of press-fitting into RCD concrete. The tip member 11 is not limited to the J-shape, but can be appropriately formed according to the sectional shape of the tip of the blade 33.

The joint material 10 having the above structure is constructed in the same manner as the above-mentioned conventional joint material 20. That is, first, the tip member 11 is attached to the blade 33 of the vibrating joint cutting machine shown in FIG. At this time, the sheet material 12 is attached so as to be wound between the bent inner surface of the tip member 11 and the blade 33 as shown in FIG. Then, while vibrating the blade 33 to which the joint material 10 is attached with the vibrator 32, the concrete for RCD is press-fitted to a predetermined depth, and then only the blade 33 is pulled up. Thereby, the tip member 11 is located at the lowermost end,
The sheet material 12 is arranged so as to stand up from the tip member 11, and the lateral joint of the dam by the RCD method is used as the joint material 10.
Created by

[0012]

EFFECT OF THE INVENTION The joint material of the present invention comprises a tip member to be hung on the lower end of a blade of a vibrating joint cutting machine, which is formed of a member having a hardness that does not break even when pressed into RCD concrete, for example, a metal plate. Since the non-metallic sheet is continuously formed on the member, the weight of the joint material can be reduced. Further, the joint material of the present invention has an advantage that the material cost can be reduced, as compared with the joint material formed by only the conventional metal plate. Further, when a flexible sheet is used as the non-metallic sheet, it can be folded or rolled, and therefore, there is an advantage that handling during transportation becomes easy.

[Brief description of drawings]

FIG. 1 is a perspective view of a joint material of the present invention.

FIG. 2 is a side sectional view showing a state in which the joint material of FIG. 1 is hung on the lower end of the blade of the vibration joint cutting machine.

FIG. 3 is a perspective view showing a conventional joint material.

4 (a), (b) and (c) are explanatory views for explaining a conventional method for applying a joint material.

[Explanation of symbols]

 10 Joint material 11 Tip member 12 Sheet material (non-metallic sheet)

Claims (2)

[Claims] 1. A joint material for forming a lateral seam of a dam constructed by the RCD method, the tip member having a hardness that does not break even when pressed into RCD concrete, and the joint member is connected to the tip member. A joint material including a non-metallic sheet. 2. The joint material according to claim 1, wherein the tip member is made of metal.