JP3522460B2 - Tunnel wall segment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel wall body segment constituting a tunnel wall body.

[0002]

2. Description of the Related Art As a method for constructing a tunnel, a so-called shield construction method has been generalized in which construction is performed while simultaneously excavating the ground and assembling segments (mainly made of concrete or steel). Most of the segments used in this shield method are rectangular and arcuate in plan view. In recent years, there has been a remarkable trend toward longer distances and faster tunnels, and in order to cope with this, a plurality of hexagonal segments formed into hexagonal shapes are often used.

FIG. 7 is a view showing this type of segment, and is a perspective view of the segment 1 as seen from the inner surface side.
The segment 1 is made of concrete, and a pair of convex portions (plugs) 5 and concave portions (sockets) 7 mainly for positioning and rotation prevention are formed on the joint surface 3 forming the hypotenuse. In addition, a bolt hole 11 for joining long segments for joining the segments 1 to each other is formed.

In order to manufacture the segment 1, a steel mold 15 as shown in FIG. 8 is used, and concrete is molded in the mold 15. The formwork 15 is composed of a pair of bottom plate blocks 17a and 17b that are brought into contact with each other, arcuate side plates 21 and 21 provided on both sides thereof, and end plates 25 and 25 that connect both ends of these side plates 21 and 21. In the space surrounded by these, concrete is poured to form the segment 1.

The end plates 25, 25 are provided with a concave portion 27 and a convex portion 29 at positions corresponding to the plug 5 and the socket 7, respectively.
Are formed. In order to manufacture the segment 1, first, concrete is molded in the form 15, and then the side plate 21 and the end plate 25 are respectively pulled out to the outside in the directions indicated by arrows in the figure, and the segment 1 is taken out.

The segment 1 manufactured as described above is
As shown in FIG. 9, they are joined to form a tunnel wall body. That is, the joint surfaces 3 of the segment 1 are joined by positioning the plug 5 and the socket 7 by fitting them. further,
The bolt holes 11 are penetrated to connect the segments with long bolts.

[0007]

By the way, in the frame 15 forming the above-mentioned segment 1, the end plate 25 and the concave portion 2 for forming the plug 5 and the socket 7 in the segment 1 are formed.
7 and the convex portion 29, when the segment 1 is separated from the mold 15 after molding, it is impossible to pull up the segment without moving the end plate 25. However, there is a problem that each end plate 25 has to be pulled outward.

Therefore, the above-mentioned segment 1 has a problem that the manufacturing work takes time and the work is troublesome. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a segment for a tunnel wall body that can simplify the work of separating the formwork member from the segment.

[0009]

That is, in the segment for a tunnel wall body according to claim 1, it is joined to another segment to constitute a tunnel wall body, and the recess for joining is provided in the other segment. A segment for a tunnel wall body having a joining convex portion to be fitted and a joining concave portion to be fitted to a joining convex portion provided on another segment, wherein the segment is provided separately from a segment main body and the segment main body. And a plug formed, the plug comprising :
It becomes fixed to the segment body as said protrusions
Both can be moved along the joint surface of the segment body.
It is characterized by being fixed to Noh .

In the joining structure of the above segments,
Since the segment body and the plug are composed of separate members, it is not necessary to take into consideration the demolding means of the segment related to the plug in the step of molding the segment body, and the position of the plug is the joint. The smell
Since it can be moved by connecting it to other segments,
The position of the segment body, etc.
Move the position of the plug to join.

A tunnel wall body segment according to a second aspect is the tunnel wall body segment according to the first aspect, wherein a base portion of the plug is fitted to a joining position of the plug in the segment body. It is characterized in that a recess is provided.

In the joining structure of the above segments,
When the plug is attached to the segment body, the plug is positioned by the recess.

According to a third aspect of the present invention, there is provided the tunnel wall segment according to the first or second aspect, wherein the plug is made of resin.

In the joint structure of the above segments,
The plug is a separate member (resin) from the segment body
Therefore, the plug can be mass-produced in a short time.

[0015]

[0016]

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. For convenience, the embodiment of the present invention
Prior to the explanation of the state, a reference example with some common parts
This will be described with reference to the drawings. All drawings smell
When the member of the reference example is common to the embodiments of the present invention,
Are denoted by the same reference numerals and the description thereof will be omitted. 1 to 4 include common parts with the embodiment of the present invention .
It is a figure which shows a reference example , and the code | symbol 31 is a segment.
FIG. 1 is a schematic cross-sectional view in the vicinity of the joint surface 33 of the segment 31. On the joint surface 33 of the segment 31, a convex portion (plug) 35 and a concave portion (socket) 37 are formed mainly for the purpose of positioning and preventing rotation. Plug 35
Is formed in a substantially rectangular shape having a predetermined thickness. As the material, concrete or ductile,
It is made of steel or resin and is formed separately from the segment main body 31a unlike the conventional one. Bonding surface 33
At the joining position of the plug 35, a recess 38 having a slight recess into which the base portion of the plug 35 can be fitted is formed in advance. At the center of the recess 38, the bolt 3
A female screw member 32a into which 9 is screwed is embedded. On the other hand, the plug 35 is formed with a through hole 35a through which the bolt 39 passes. Socket 37 is plug 3
Reference numeral 5 is a recess that can be fitted.

FIG. 2 is a perspective view of the segment 31 as viewed from the inner surface side. The segment 31 is made of concrete, and a pair of convex portions (plugs) 35 and concave portions (sockets) 37 are formed on the joint surface 33 forming the hypotenuse as in the conventional case. Reference numeral 41 is a bolt hole for passing a long bolt for joining the segments 31 to each other. Next, the structure of the formwork for manufacturing the segment body will be described with reference to FIG.
And FIG. 4 will be described.

FIG. 3 is a perspective view showing the structure of a mold 45 for molding the segment main body 31a. The formwork 45 is
A pair of bottom plate blocks 47a, 47 attached to each other
b and arc-shaped side plates 51 provided on both sides of these,
51 and end plates 55, 55 connecting both ends of these side plates.

As shown in FIG. 4, the end plate 55 of the form 45 is provided with an opening 60 for forming a recess (socket) 37 in the segment body 31a.
At 0, a recess forming member 60a is detachably attached. Further, as shown in FIG. 3, the end plate 55 has a slight convex portion 57 formed at a position corresponding to the slight concave portion 38 of the segment main body 31a. This end plate 55, 55
Is provided so that the upper side is inclined in the direction of opening outward.

Next, a method of manufacturing the segment main body 31a using the mold 45 will be described. First, members for forming the female screw member 32a, the convex portion 60a and the bolt hole 41 are arranged in advance in the mold 45. Further, as shown in FIG. 4, the recess forming member 60 is formed in the opening 60 of the mold 45.
The a is attached in the direction indicated by the arrow A so that the tip of the a projects into the inside 60b of the mold 45.

Next, as in the conventional case, the steel mold 4 is
Concrete is poured into the space of 5 and solidified. After the concrete is solidified, the recess forming member 60a is detached from the opening 60 in the outer direction 60c of the form 45 indicated by the arrow B. Finally, the side plates 51, 51 are moved in the arrow direction. Then, the segment body 31a is taken out upward. In this case, since the end plates 55, 55 are provided so as to be inclined outward as described above, and the protrusions 60a are less likely to project, the end plate 5 does not have to be moved.
The slight convex portion 57 formed in 5 does not hinder the shape removal.

The segment body 3 manufactured in this way
As shown in FIG. 1, a slight recess 38 is formed at the position where the plug 35 is joined, and the other segment 31 is formed on the la 1a.
A concave portion 37 for fitting the convex portion 35 is formed.
Further, a female screw member 32a is embedded in the segment body 31a. On the other hand, the plug 35 has a through hole 35a through which the bolt 39 passes.

Next, the plug 35 is attached to the segment main body 31a.
1, the plug 35 is fitted into the recess 38, the plug 35 is positioned in this state, and the male screw member 39b of the bolt 39 is inserted into the female screw member 32a through the through hole 35a. To fix the plug 35 to the segment body 31a.

When joining the segments 31 to each other, although not shown, the plug 35 and the socket 37 are fitted to each other as in the conventional case. In addition, segment 31
Long bolts are used to fix and connect them.

In the tunnel wall segment 31 having the above-described structure, since the segment body 31a and the convex plug 35 are separately molded, the segment body 31a can be molded without moving the end plate 55. It can be lifted up from 45, and can be easily removed from the mold in a short time.

Therefore, in the above tunnel wall segment, the segment 31 having the plug 35 and the socket 37 can be easily manufactured.

Further, since the recess 38 is formed in the segment body 31a, it is easy to determine the joining position when joining the plug 35.

Even when the plug 35 is made of resin, the manufacturing method of the segment main body 31a and the joining method of the plug 35 may be the same as in the case of the above reference example , but when the main purpose is positioning. It is also possible to omit the screws and screw holes and simply bond them with an adhesive or the like.

FIG. 5 and FIG. 6 is a diagram showing the implementation of the embodiment of the present invention. The embodiment shown in FIG. 5 is based on FIGS.
The difference from the reference example shown in FIG. 5 is that the plug 35 is movably fixed to the segment body 31a. That is, as shown in the schematic cross-sectional view near the plug 35 of FIG. 5 and the plan view of FIG.
Is formed so that the plug 35 can move,
The through hole 35a provided in the plug 35 is a long hole.

In this embodiment, since the plug 35 is movable with respect to the segment body 31a, the position of the plug 35 can be finely adjusted according to the position of the socket 37 of the adjacent segment. It is possible to fit the segments together by the plug 35 and the socket 37. Further, the position of the plug can be adjusted in order to reduce the influence of rolling that occurs when the tunnel wall body 31 is formed.

Incidentally, the plug 35 is the above-mentioned reference example and the book.
In the embodiment of the invention, a plug having a substantially rectangular shape and a predetermined thickness is used, but this plug may have a cylindrical shape or a trapezoidal shape. The plugs and sockets may be formed on the side plates, or may be formed on both the side plates and the end plates, in addition to the case formed on the end plates of the segments. Furthermore, although the above-mentioned segment is described using a hexagonal segment, it is not limited to this hexagonal shape, and can be applied to any segment such as a square shape or a convex segment.

[0033]

The tunnel wall segment of the present invention has the following effects. That is, claim 1
According to the described tunnel wall segment, a segment including a plug and a socket can be easily manufactured as in the conventional case. Furthermore, since the segment body can be easily removed from the mold, the efficiency of the segment manufacturing work can be improved. Also, depending on the socket position of the adjacent segment,
The position of the plug can be finely adjusted.
Components should fit well with a plug and socket.
And are possible. Furthermore, we will form the tunnel wall
To reduce the effects of rolling that sometimes occurs, plug
It is also possible to adjust the position of.

In the tunnel wall segment according to the second aspect of the present invention, since the recess is formed in the segment body, it is easy to determine the joining position when joining the plugs. In the tunnel wall segment according to the third aspect, since the plug is formed of resin, mass production is possible, manufacturing cost can be reduced, and screwing can be omitted.

[0035]

[Brief description of drawings]

FIG. 1 is a reference including a common part with an embodiment of the present invention .
It is a schematic sectional drawing of the principal part of a segment which shows an example .

FIG. 2 is a reference including common parts with the embodiment of the present invention .
It is the perspective view seen from the inner surface of the segment simple substance which shows an example .

FIG. 3 is a reference including common parts with the embodiment of the present invention .
It is a schematic diagram of a form for forming a segment which shows an example .

FIG. 4 is a reference including common parts with the embodiment of the present invention .
It is the cross-sectional schematic diagram which expanded the convex part vicinity of the mold for shape | molding the segment which shows an example .

5 is a schematic cross-sectional view of the vicinity of the plug segments showing the form of implementation of the present invention.

6 is a plan view of the vicinity of the plug segments showing the form of implementation of the present invention.

FIG. 7 is a perspective view of the conventional segment as seen from the inner surface.

FIG. 8 is a perspective view of a mold for manufacturing a conventional segment.

FIG. 9 is a schematic view showing a state in which conventional segments are joined together.

[Explanation of symbols]

31 ... Segment 31a ... Segment body 33 ... Bonding surface 35 ... Convex part (plug) 37 ... Recessed part (socket) 38 ... Recess

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroki Someya 2-6-21 Yaesu, Chuo-ku, Tokyo Ishi Kawashima Kenzai Kogyo Co., Ltd. (72) Inventor Akio Hashiguchi 2-6-21 Yaesu, Chuo-ku, Tokyo Ishikawajima Kenzai Kogyo Co., Ltd. (56) Reference JP-A-7-62989 (JP, A) Actual Kaihei 2-132800 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 11/08 E21D 11/04

Claims (3)

(57) [Claims] 1. A joining convex portion which is joined to another segment to form a tunnel wall body, and which fits into a joining concave portion provided in the other segment, and a joining convex portion provided in the other segment. a segment for a tunnel wall having a joining recess to be fitted to, the segment consisting and a segment body and plug and formed separately said segment body, said plug, said as the protrusions It is fixed to the segment body and along the joint surface of the segment body.
A segment for a tunnel wall, which is movably fixed . 2. A tunnel wall for segment according to claim 1, in the segment body, the base of the plug to the joining position of the plug is characterized in that the recess fits are provided tunnels Wall segment. 3. The tunnel wall body segment according to claim 1, wherein the plug is made of resin.