JPH09119294A - Segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the mutual joining operation of segments, and to correspond to automatic assembly. SOLUTION: A male type segment 1 and a female type segment 2 having a trapezoidal shape in a plan view, in which sections among mutual skin plates 3 installed on surfaces and rears are made of concrete K, are joined in the circumferential direction, and a ring constituting a cylindrical wall body is constructed. A pair of male type joint metal fittings 4 with metal fitting bodies 6 clamped and fixed to the skin plates 3' by a plurality of flush bolts 5 and projections 7 integrally connected to the metal fitting bodies 6 by connecting sections 8 are mounted on the joint surface 1a of the male type segment 1. A pair of female type joint metal fittings 12, to which groove sections 11, into which the projections 7 of the male type joint metal fittings 4 can be fitted, are formed and metal fitting bodies 13 are clamped and fastened to the skin plates 3 by a plurality of flush bolts 5, are installed to the joint surface 2a of the female type segment 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment which constitutes a tubular wall body in the axial direction of an excavation hole by connecting a plurality of mutually.

[0002]

2. Description of the Related Art As a method for constructing a tunnel, a so-called shield construction method is generally used in which segments (mainly made of concrete or steel) are assembled on the inner surface side of an excavation hole to construct a tubular wall body. As the segments used in this shield construction method, those having a rectangular shape in a plan view and an arc plate shape are mainly used, and these segments are joined together by bolts. As a structure for joining the segments with each other with this bolt, a joint having holes communicating with each other when the joining faces of the segments are brought into contact with each other is embedded in the vicinity of the joining faces of the segments, A structure is generally used in which a bolt is inserted into a hole portion and a nut is fastened to the bolt in a state where the joint surfaces of the segments are in contact with each other so that the portions communicate with each other. Further, there is also a structure in which an insert fitting as a nut member is embedded in each segment, and bolts penetrating adjacent segments are fastened to each other for joining.

[0003]

However, in the above structure, the bolt is inserted into the hole formed in the joint surface of the joint at the construction site, and the nut is fastened to the bolt or embedded in the mutual segments. Since the extremely complicated work of fastening the bolt to the insert metal fitting is required, there is a limit in shortening the assembly time, and it is difficult to adapt to automatic assembly by a robot. Moreover,
Even if the secondary lining is omitted, the bolt box formed in the segment must be closed in order to install the bolts and nuts, and a new joint structure can be used to speed up construction and save labor. The current situation is that development is an urgent task.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a segment which can be joined to each other extremely easily and reliably.

[0005]

In order to achieve the above object, the segments according to claim 1 are joined together with their joining surfaces aligned with each other, and skin plates are formed on the front and back sides constituting the tunnel wall. A segment provided,
The joint surface is provided with male joint fittings each having a ridge that is inclined and projected with respect to the joint surface, and is fixed to the skin plate, respectively, and the joint surface on which the male joint fitting is provided. Female joint fittings having grooves that are inclined and drawn in with respect to this joint surface are respectively fixed to the skin plate and provided on the other joint surface to be joined to the male joint fitting. The protrusions are joined to each other by fitting them into the groove of the female joint fitting.

According to a second aspect of the invention, in the segment according to the first aspect, the male joint fittings and the female joint fittings fixed to the front and back of the skin plate are
It is characterized in that they are connected to each other by connecting fittings.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the segment of the present invention will be described below with reference to the drawings. 1 to 3,
Reference numeral 1 is a male segment, and reference numeral 2 is a female segment. The male segment 1 and the female segment 2 are each formed in a trapezoidal shape in a plan view, and the joint surfaces 1a, 2a in the circumferential direction are arcuate plates inclined with respect to the axial direction of the drill hole. By joining each in the circumferential direction, a ring that constitutes the tubular wall body is constructed. The male segment 1 and the female segment 2 each have a skin plate 3 made of a metal plate on the front and back sides, and a high-strength synthetic segment in which concrete K is provided between the skin plates 3 is formed. .

As shown in FIG. 4 and FIG. 5, the male segment 1 is provided with a pair of male joint fittings 4 on its circumferential joint surface 1a at intervals in the thickness direction. There is.
These male joint fittings 4 are roughly composed of a fitting main body 6 fastened and fixed to the skin plate 3 by a plurality of countersunk bolts 5 and a ridge 7 integrally connected to the fitting main body 6 by a connecting portion 8. There is. The ridges 7 of these male joint fittings 4 are formed substantially parallel to the axial direction of the tubular wall body,
It is gradually separated from the joining surface 1a from one end side to the other end side, and is further formed in a tapered shape gradually narrowed from one end side to the other end side. In addition, on one end side of the male joint fitting 4, a convex portion 9 continuous with the ridge 7 of the male joint fitting 4 is formed.

Further, as shown in FIGS. 6 and 7, the female segment 2 has a ridge 7 formed on the male joint fitting 4 of the male segment 1 on its circumferential joint surface 2a. Pair of female joint fittings 12 in which a groove portion 11 into which can be fitted is formed
Are provided at intervals in the thickness direction, and the metal fitting body 13 of the female fitting 12 is also provided with the skin plate 3
It is fastened and fixed by a countersunk bolt 5. The groove 11 of the female fitting 12 is formed substantially parallel to the axial direction of the tubular wall body, and is gradually drawn from the joint surface 2a from one end side to the other end side. To the other end side, the taper shape is gradually narrowed. It should be noted that the female joint plate 12 is provided on the joint surface 2a of the female segment 12 on one end side of the female joint fitting 12.
And a concave portion 14 continuous therewith is formed.

Then, the other end side of the ridge 7 formed on the male joint fitting 4 of the male segment 1 is gradually extended from one end side of the groove portion 11 formed on the female joint fitting 12 of the female segment 2. 8 by sliding the male segment 1 and the female segment 2 in the axial direction while fitting them to each other.
As shown in FIG. 3, the protrusion 7 of the male joint fitting 4 fits into the groove portion 11 of the female joint fitting 12, and
The convex portion 9 and the concave portion 14 formed on a and 2a are fitted to each other, and the male segment 1 and the female segment 2 are joined to each other at the joint surface 1
a and 2a are joined to each other.

As described above, according to the segment having the above-described structure, the protrusion 7 of the male joint fitting 4 of the male segment 1 is simply fitted into the groove portion 11 of the female joint fitting 12 of the female segment 2. It is extremely easy to engage the male joint fitting 4 and the female joint fitting 12 and to connect the male segment 1 and the female segment 2 in the circumferential direction by the engaging force to construct a ring. it can.

That is, compared with the conventional fastening structure using bolts and nuts or the fastening structure in which bolts are fastened to the insert fitting, the labor required for joining the segments can be greatly reduced and the robot can be automatically assembled. It can be easier, and moreover,
Since there is no bolt box or the like, the work of closing the bolt box can be omitted. Further, since the ridge 7 of the male joint fitting 4 and the groove 11 of the female joint fitting 12 each have a tapered shape that is gradually narrowed in the insertion direction of the ridge 7, the ridge 7 extends into the groove 11. By fitting 7 to each other, a wedge effect is obtained by the groove 11 and the protrusion 7, and the joint surfaces 1a and 2a of each other are attracted to each other, so that the male segment 1 and the female segment 2 are securely joined to each other. Can be secured.

When constructing a ring constituting a cylindrical wall body using these male segment 1 and female segment 2, if the number of divisions in the circumferential direction is an even number, each of them has a trapezoidal shape in plan view. Male segment 1 and female segment 2 are joined alternately. When the number of divisions in the circumferential direction is odd, the male joint fitting 4 provided on the male segment 1 is provided on one end side, and the female joint fitting provided on the female segment 2 on the other end side. Join using a parallelogram segment with 12.

Further, FIG. 9 shows a male joint fitting 4
The rigidity is increased by connecting each other or the female joint fittings 12 by the connecting fittings 15.
According to this segment, it is possible to further improve the strength. Further, in the above structure, the male joint fitting 4 and the female joint fitting 12 are fixed to the skin plate 3 by the countersunk bolts 5, respectively. However, the fixing means is not limited to fastening and fixing by the countersunk bolts 5. For example, welding or adhesion with a strong adhesive may be used.

[0015]

As described above, according to the segment of the present invention, the following effects can be obtained. According to the segment of claim 1, the protrusion of the male joint fitting is
The segments can be joined very easily by the engaging force of the ridges and the grooves simply by fitting them into the grooves of the female joint fitting. That is, compared with the conventional fastening structure using bolts and nuts or the fastening structure that fastens bolts to the insert fitting, the labor required for the joining work can be significantly reduced and the automatic assembly by the robot can be facilitated. Further, since there is no bolt box or the like, the work of closing the bolt box can be omitted.

According to the segment of the second aspect, the male fittings or the female fittings are connected to each other by the connecting fittings, whereby the rigidity is greatly enhanced, and a high-strength segment can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a segment illustrating a configuration and a structure of a segment according to an embodiment of the present invention.

FIG. 2 is a plan view of a joint portion between segments for explaining the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a segment joining portion for explaining the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 4 is a perspective view of a male segment for explaining the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 5 is a side view of a male segment for explaining the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 6 is a perspective view of a female segment for explaining the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 7 is a side view of the female segment for explaining the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 8 is a cross-sectional view of a joint portion of a segment for explaining the configuration and structure of the segment according to the embodiment of the present invention.

FIG. 9 is a cross-sectional view of another segment joining portion for explaining the configuration and structure of the segment according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Male segment 2 Female segment 1a, 2a Joining surface 3 Skin plate 4 Male joint fitting 5 Flat head bolt (bolt) 7 Protrusion 11 Groove 12 Female joint fitting 15 Coupling fitting

Claims (2)

[Claims] 1. A segment, which is joined in a state where the joining surfaces thereof are aligned with each other, and has skin plates provided on the front and back sides constituting a tunnel wall, wherein the joining surface has Male joint fittings having slanted and protruding ridges are provided by being fixed to the skin plates, respectively, and the other joint surface to be joined to the joint surface provided with the male joint fittings is Female joint fittings each having a groove that is inclined and drawn in with respect to the joint surface are provided by being fixed to the skin plate, and the protrusion of the male joint fitting is provided with the groove of the female fitting. Segments characterized in that they are joined together by mating. 2. The male joint fittings and the female joint fittings fixed to the front and back of the skin plate are connected to each other by connecting fittings.
The described segment.