JP2611101B2 - New material precast member joining method and new material concrete 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 new material precast member and a new material concrete wall.

[0002]

2. Description of the Related Art Heretofore, when a tunnel is constructed using a shield machine, breaking of a shield starting point of a shaft shaft retaining wall has been performed manually by performing solid ground improvement such as injection and freezing.

[0003] Recently, a new material (CFRP Carbon Fiber Reinfor) made of carbon fiber that can be cut by the shield machine is provided at the place where the shield machine starts and reaches the shaft shaft retaining wall.
cedPlastic) with new material concrete
NOMST (NovelMat), which constructs a tunnel by directly excavating a shaft made of new material concrete using a shield machine
A tunnel construction method called erial Shield-cuttable Tunnel-wall system) has been devised.

[0004] The new material concrete is a concrete whose main reinforcement is a wire rope formed by twisting carbon fibers or the like, and is manufactured as a precast member (NOMST precast member). Then, in the construction of a normal shaft or the like, a precast member having a required length is integrally formed, and is built as a core material such as a muddy solidified wall, and then excavated by a shield machine.

[0005]

By the way, in tunnel construction in an urban area, a shaft is often constructed by underground construction due to the problem of congestion of underground buried objects and interference with surrounding structures. I have. In this case, the conventional N
Since the OMST precast member is built integrally with a long one, there is a problem that it is difficult to perform the construction using the NOMST precast member when performing underground construction with a limited height. there were.

The present invention has been made in view of such a problem, and an object of the present invention is to make it possible to easily start and reach a shaft of a shield machine even when performing construction under a road with a limited height. It is an object of the present invention to provide a method for joining a new material precast member that can be constructed in a new material and a new material concrete wall using the same.

[0007]

In order to achieve the above-mentioned object, a first invention is to provide a new material precast member in which a new material rod made of carbon fiber, glass fiber or steel fiber is provided as a main reinforcement in concrete. Wherein the end of the new material rod of the first new material precast member and the end of the new material rod of the second new material precast member are joined by a mechanical joint made of a new material. This is a method for joining a new material precast member. A second invention is a new material concrete wall obtained by providing a plurality of new material precast columns obtained by the above-described method for joining a new material precast member in a horizontal direction.

[0008]

According to the present invention, a new material rod end of a first new material precast member and a new material rod end of a second new material precast member are joined to each other by a mechanical joint made of a new material. The second new material precast member is joined. Then, a plurality of obtained new material precast columns are provided in the horizontal direction to obtain a new material concrete wall.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view of a new material precast member 1 according to one embodiment of the present invention.

A new material rod 7 is provided in a rectangular parallelepiped concrete body 3. The new material rod 7 is fixed to the concrete body 3 by a fixing tool 9 made of a new material.

FIG. 2 shows two new material precast members 1
FIG. 6 is a perspective view of a joint box 11 made of a new material used when joining the two. As shown in the figure, this joint box 11 has a thin hollow rectangular parallelepiped shape, and is provided with an inlet 13 for injecting epoxy into a side portion.

FIG. 3 shows a new material precast pillar joined according to this embodiment. In this case, an example is shown in which three new material precast members are joined.

The new material precast member 1c has a new material rod 7c provided in a concrete body 3c.
At the lower end of the new material rod 7c, an iron plate 15c, a fastener 1
7c, a fixing member 19c made of a new material is provided at the upper end of the new material rod 7c, and the new material rod 7c is fixed to the concrete body 3c.

The new material precast member 1b has the same configuration as the new material precast member shown in FIG.

The new material precast member 1a has a new material rod 7a provided in a concrete body 3a.
At the upper end of the new material rod 7a, an iron plate 15a, a fastener 1
A fixing member 19a made of a new material is provided at the lower end of the new material rod 7a, and the new material rod 7a is fixed to the concrete body 3a.

Next, the joining method of the new material precast member will be described. New material precast member 1 at the bottom
After inserting c, new material precast member 1 in the middle
While the b is suspended, the new material rod 7c and the new material rod 7b are joined by the mechanical joint 21 made of the new material.

FIG. 4 shows the mechanical joint 21 and the new material rod 7.
FIGS. 7B and 7C are diagrams showing nuts 22 a and 22 b at both ends of a mechanical joint 21.
A screw is provided at the end of c. And nut 2
2a and 22b are screwed into the new material rods 7b and 7c, and the new material rod 7c and the new material rod 7b are joined.

Thereafter, the joint is covered with a joint box 11 made of a new material, and an epoxy 23 or the like is filled from the inlet 13. In addition to the epoxy 23, expanded concrete or the like may be filled.

In the same procedure, the new material precast member 1
b and the new material precast member 1a are joined. In this way, a new material precast column shown in FIG. 3 is obtained.

Further, a wall body is constructed by arranging a plurality of precast columns of the new material thus obtained in the horizontal direction. At this time, the adjacent new material precast columns are connected to each other by the connecting material.

FIG. 5 is a schematic view of a shaft for a shield tunnel using a new material precast column 31. In the figure, 30 is a steel material, 33 is a wall body made of a new material precast column 31, and 35 is a shield machine. As shown in FIG. 5, a new material precast column 31 is used in a portion to be excavated by the shield machine 35. And the shield machine 35
Wall body 33 composed of new material precast columns 31
Is directly excavated to construct a shield tunnel.
The applicant of the present invention has already filed an application for joining the new material precast column 31 and the steel material 30 (Japanese Patent Application No. 3-182).
564). As described above, according to the present embodiment, the shield machine 35 can be used even when performing underground construction with a limited height.
A shaft for starting and arriving can be easily constructed.
In addition, when the shaft is deep, the precast member can be divided into appropriate lengths to perform on-site joining. Further, since the precast member is divided into appropriate lengths, manufacture, transportation, and handling are facilitated.

In this embodiment, an example in which three new material precast members are joined has been described, but it goes without saying that three or more new material precast members can be joined.

[0024]

As described above in detail, according to the present invention, a shaft for starting and reaching a shield machine can be easily constructed even when construction under a road with a limited height is performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a new material precast member 1.

FIG. 2 is a perspective view of a joint box 11;

FIG. 3 is a diagram showing the configuration of a new material precast column

FIG. 4 is a view showing a mechanical joint 21 and new material rods 7a and 7b.

FIG. 5 is an explanatory view when the wall body 33 is used for a shaft for a shield tunnel.

[Explanation of symbols]

 1 New material precast member 3 Concrete 7 New material rod 9 Fixing tool 11 Joint box 21 Mechanical coupling

 ──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000001317 Kumagaya Gumi Co., Ltd. 2-6-1-8, Chuo, Fukui-shi, Fukui Prefecture (73) Patent holder 000195971 Nishimatsu Construction Co., Ltd. 1-120 Toranomon, Minato-ku, Tokyo (73) Patent holder 000201478 Maeda Construction Industry Co., Ltd. 2- 10-26 Fujimi, Chiyoda-ku, Tokyo (73) Patent holder 000002299 Shimizu Construction Co., Ltd. 1-3-2 Shibaura, Minato-ku, Tokyo (73) Patent Authority 000174943 Mitsui Construction Co., Ltd. 1-3-2 Otemachi, Chiyoda-ku, Tokyo (73) Patent owner 000230010 Geostar Co., Ltd. 4-2-2 Shiba, Minato-ku, Tokyo (73) Patent owner 000140982 Hazumi Corporation 2-5-8 Kita-Aoyama, Minato-ku, Tokyo (72) Koji Matsumoto 5-29-25 Oizumi Gakuen-cho, Nerima-ku, Tokyo (72) Inventor Minoru Nakamura Chiyo, Tokyo 2-6-3 Otemachi-ku, Nippon Steel Corporation (72) Inventor Masatake Tatsuta 2-6-1-3 Otemachi, Chiyoda-ku, Tokyo Nippon Steel Corporation (72) Inventor Katsuhiro Suzuki Tokyo (12) Sato Kogyo Co., Ltd. (72) Inventor Yoshihiro Takano 2-53-3 Misaki-cho, Chiyoda-ku, Tokyo Tekkaken Construction Co., Ltd. -108779 (JP, A) JP-A-5-302490 (JP, A)

Claims (4)

(57) [Claims] 1. A method for joining a new material precast member in which a new material rod made of carbon fiber, glass fiber, or steel fiber is provided as a main reinforcing bar in concrete, wherein a new material rod end of the first new material precast member is provided. A new material precast member joining method, comprising joining a new material rod end of a second new material precast member with a mechanical joint made of a new material. 2. A joint box made of a new material is provided at a joint between the first new material precast member and the second new material precast member, and a filler is sealed in the joint box. The method for joining precast members according to claim 1. 3. A new material precast column obtained by the method for joining a new material precast member according to claim 1,
A new material concrete wall obtained by installing multiple pieces in the horizontal direction. 4. The new material concrete wall according to claim 3, wherein the new material concrete wall is used for a shaft for a shield tunnel.