JP2989328B2 - Junction structure of segment for tunnel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment for a tunnel.
In the joint structure .

[0002]

2. Description of the Related Art Conventionally, when a tunnel is excavated by a shield excavator, an arc plate-shaped concrete tunnel segment is assembled along an inner peripheral surface of a tunnel by an erector to construct a tunnel wall surface. In this case, visually check and correct the displacement of the joining surface between the already assembled tunnel segment and the new tunnel segment to be assembled, and match the bolt holes provided on the joining end surfaces of these segments. It is assembled integrally with bolts and nuts.

[0003]

Conventionally, as described above, the displacement and the like of the joining surface between the already assembled tunnel segment and the new tunnel segment to be assembled are visually confirmed and corrected. The bolt holes provided on the joint end surfaces of the segments are aligned and assembled integrally with bolts and nuts, but the bolt holes are located in a difficult-to-see position sinking from the surface of the segment. It takes a lot of time to tighten bolts and nuts.

[0004] Further, in the case of a large-sized shield excavator, there is a problem that the above-mentioned operation is performed at a high place and involves danger. The present invention is proposed in view of the above problems,
The purpose is to easily and safely attach new segments to existing segments.
It is an object of the present invention to provide a joining structure of a tunnel segment .

[0005]

According to the present invention, there is provided a segment for a tunnel according to the present invention.
The junction structure of the tunnel
A first concave portion extending in a longitudinal direction of the joint end surface is provided on the surface;
And joined to the one tunnel segment
In the longitudinal direction,
And a second recess facing the first recess
Provided between the first recess and the second recess.
Positioning member separate from both segments fits
The positioning member is formed between the first concave portion and the first concave portion.
2 is movable in the longitudinal direction between the two concave portions.
Features. A tunnel segment according to claim 2.
The tunnel joint structure is such that the tunnel segment is flat.
It has a rectangular shape when viewed from one side of the joining end faces located on both sides.
The first recess is provided on the other side, and the second recess is provided on the other side.
That the tunnel segments are connected.
And a first recess provided in one of the tunnel segments.
Part and a second recess provided in the other tunnel segment
The feature is that the department faces each other. Furthermore, the joining structure of the tunnel segment according to claim 3 is characterized in that:
The concave portion and the second concave portion are provided with each other.
The end face is formed in a wedge-shaped cross section that expands outward.
The positioning member has a wedge-shaped diamond on both sides.
It is a rectangular parallelepiped with a rectangular cross section, and the first and second concave portions are diamond-shaped.
It is characterized by being inserted half by side on both sides
I have.

[0006]

The joining structure of the tunnel segment according to the present invention is as described above.
It is configured as described above,
When installing, the joining end face of one tunnel segment
When the positioning member is disposed in the first concave portion formed in
Both are formed on the joint end face of the other tunnel segment.
The positioning member is fitted into the second recess thus formed, and the first
Positioning portion in a space formed by the concave portion and the second concave portion.
Of the new tunnel segment
Perform positioning. At this time, the positioning member is
In the longitudinal direction of the joining end face in the concave portion and the second concave portion.
If it can be moved, the positioning member
Moving the new segment along the joint end
And positioning with respect to the existing segment
It will be easy to do. Also, joints provided on both sides
One of the end faces has a first recess and the other has a second recess.
By being installed, unevenness does not interfere with loading and storage
Will also be easier. Further, the first and second recesses are
It is formed in the shape of a wedge that spreads out on the outer surface of the
It has a rectangular parallelepiped shape with a rhombic cross section.
By inserting half of the diamond-shaped cross section of the material,
It is easy to insert the positioning member
Thus, the positioning member can be easily moved.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a joining structure of a tunnel segment according to the present invention will be described.
The structure will be described with reference to the embodiment shown in FIGS.
1 and 2 show the entirety of the tunnel segment. Reference numeral 1 denotes a tunnel segment, and the tunnel segment 1 joins adjacent ones to form a wall surface of the tunnel. The tunnel segment 1 is formed in an arc plate shape having a constant thickness, and a plurality of joint fittings 4 are embedded in the arc-shaped joint end surface 2 and the rectangular joint end surface 3.

A recess 5 of an appropriate size is formed inside these joint fittings 4. When a new tunnel segment 1 is set at a position adjacent to the existing tunnel segment 1, the bolt is moved to one side. From the recess 5 of the segment 1 of the above, insert the bolt hole of the fitting 4 into the bolt hole of the fitting 4 of the mating segment 1 and then insert the nut into the recess 5 of the fitting 4 of the mating segment 1. By fastening these bolts and nuts, a new tunnel segment 1 is integrally assembled with the existing tunnel segment 1.

In the center of the tunnel segment 1,
A hanging metal fitting 6 is buried in the thickness direction of the segment, thereby forming a clout hole 7. As shown in FIGS. 1, 2, and 5, a wedge-shaped pin hole (a positioning member = a concave portion in which the wedge-shaped knock pin 9 is engaged) 8 is formed in the arc-shaped joint end surface 2 and the rectangular joint end surface 3 of the tunnel segment 1. Have been. The wedge-shaped pin holes 8 are formed at two places between the joint fittings 4 provided on the arc-shaped joint end face 2 and at one place between the joint fittings 4 provided on the rectangular joint end face 3.

The wedge-shaped pin hole 8 has a rectangular shape and, as shown in FIG.
It is formed in a wedge shape that expands toward the outer surface of the
A wedge-shaped knock pin (positioning member) 9 shown in FIG. 4 is inserted into the wedge-shaped pin hole 8.
That is, the wedge-shaped knock pin 9 is a rectangular parallelepiped having a rhombic cross section,
As shown in FIG. 6, half of the rhombic cross section of the wedge-shaped knock pin 9 is inserted.

The length L of the wedge-shaped dowel pin 9 is shorter than the length of the wedge-shaped pin hole 8. When the wedge-shaped dowel pin 9 is inserted into the wedge-shaped pin hole 8, the length L of the wedge-shaped dowel pin 9 passes through the inside of the wedge-shaped pin hole 8. It can move in any direction. FIGS. 7A and 7B
Shows a state in which the tunnel wall surface is constructed by the tunnel segments 1.

Next, the procedure for constructing the tunnel wall will be described.
When the tunnel wall is constructed by the tunnel segments 1, wedge-shaped pin holes provided in the arc-shaped joint end surface 2 and the rectangular joint end surface 3 of each existing tunnel segment 1.
The wedge-shaped knock pin 9 is inserted into the (first recess) 8 . Next, as shown in FIG. 7A, the arc-shaped joint end face 2 of the new tunnel segment 1b is applied to the arc-shaped joint end face 2 of each existing tunnel segment 1a, and the arc-shaped joint of the new tunnel segment 1b is formed. Wedge-shaped pin provided on end face 2
The hole (second concave portion) 8 is engaged with the wedge-shaped knock pin 9 to position a new tunnel segment 1b.

Next, the new tunnel segment 1b is slid in the direction of arrow A using the wedge-shaped knock pin 9 as a guide member, and the new rectangular segment end face 3 of the new tunnel segment 1b is rectangularly joined to each of the existing tunnel segments 1a. It is joined to the end face 3. Also at this time, a wedge provided on the rectangular joining end face 3 of the new tunnel segment 1b.
The pin-shaped hole (second concave portion) 8 is engaged with the wedge-shaped knock pin 9 supported on the rectangular joint end face 3 of each of the existing tunnel segments 1a, and the new tunnel segment 1 is formed.
Positioning b is performed.

Next, the arc-shaped joint end face 2 and the rectangular joint end face 3 of the existing tunnel segment 1a and the new tunnel segment 1b are joined to the joint fitting 4 and the bolt / bolt.
Assemble integrally with nut. Next, the reason why the wedge-shaped dowel pin 9 is used as described above will be described. When setting a new tunnel segment 1b, the arcuate joint end face 2 and the rectangular joint end face 3 are set to the other segment 1a.
It is very difficult to join them simultaneously. This is because the segments must be moved diagonally.

Therefore, usually, first, one of the arc-shaped joint end face 2 and the rectangular joint end face 3 is joined, and then the segments are slid and the remaining joint faces are joined.
In this case, the length L of the wedge-shaped dowel pin 9 is made shorter than the length of the wedge-shaped pin hole 8 so that the wedge-shaped dowel pin 9 is formed into the wedge-shaped pin hole 8.
When the wedge-shaped dowel pin 9 is made movable in the length L direction in the wedge-shaped pin hole 8 when it is inserted, the positioning of the new tunnel segment 1b and the sliding in the arrow A direction can be easily performed. . This means that automation of the segment assembling operation including the bolt and nut fastening operation can be achieved.

In this embodiment, a wedge-shaped pin hole 8 is formed in the arc-shaped joint end face 2 and the rectangular joint end face 3 of the tunnel segment 1, where a wedge-shaped notch pin 9 is engaged.
Although positioning is performed on two surfaces, a wedge-shaped pin hole 8 may be formed only on one of the bonding surfaces to perform positioning on one surface.

[0017]

According to the present invention, a segment for a tunnel is provided.
When connecting tunnels, connect segments for tunnels.
The tunnel end of one of the tunnel segments.
A positioning member is provided in the first recess formed.
In addition, formed on the joint end face of the other tunnel segment
The positioning member is fitted into the second recess, and the first recess is
Positioning member in the space formed by the part and the second recess
Position of new tunnel segment as placed
After making a decision, press the buttons on these tunnel segments.
Existing tunnel segment
Self-assembly of new tunnel segments for
It made whether, this task can be easily performed safely. At this time, the positioning member is made up of the first concave portion and the second concave portion.
Can be moved in the longitudinal direction of the joint end face in the recess
With the positioning member inserted, a new
Can be moved along the joint end face.
Therefore, positioning with respect to existing segments can be performed easily.
That can be used to
Workability can be improved. Also, both segments
The first concave portion is provided on one of the joining end surfaces provided on the
The second concave portion is provided on each side, so that
Has the effect that it is not in the way
You. Further, the first and second concave portions are formed on the outer surface of the segment.
It is formed in a wedge shape that expands, and the positioning member has a rhombic cross section.
It has a rectangular parallelepiped shape.
Positioning in each recess by inserting half of the surface
For easy insertion of positioning members and positioning within the recess
Also, there is an effect that the member for movement can be easily moved.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a tunnel segment according to the present invention.

FIG. 2 is a plan view of the tunnel segment.

FIG. 3 is a longitudinal sectional side view showing a concave portion of the tunnel segment.

FIG. 4 is a perspective view showing a positioning member of the tunnel segment.

FIG. 5 is a perspective view showing a concave portion of the tunnel segment.

FIG. 6 is a perspective view showing a state where a positioning member is fitted into a concave portion of the tunnel segment.

7A is an explanatory diagram showing a state in which a new segment is being joined to an existing segment, and FIG. 7B is an explanatory diagram showing a state when joining is completed.

[Explanation of symbols]

 1 segment 1a Existing segment 1b New segment 8 Recess 9 Positioning member

Continuation of front page (72) Inventor Noriomi Yahara 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Corporation (56) References Hikaru 2-132800 (JP, U) (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 11/08

Claims (3)

(57) [Claims] 1. A joining end face of one tunnel segment.
A first concave portion extending in a longitudinal direction of the joint end face is provided.
And joined to the one tunnel segment
The junction end face of the tunnel segment
A second recess extending and facing the first recess is provided.
And between the first concave portion and the second concave portion,
Positioning members separate from both segments fit
The positioning member is provided between the first concave portion and the second concave portion.
In the longitudinal direction.
Junction structure for tunnel segments. 2. The tunnel segment is rectangular in plan view.
And has one of the joining end faces located on both sides.
One concave portion is provided on the other, and the second concave portion is provided on the other.
And the tunnel segments are connected so that
First recess provided in one of the tunnel segments and the other
And the second recess provided in the other tunnel segment
The tunnel cell according to claim 1, wherein the tunnel cell faces each other.
Joint structure. 3. The method according to claim 1, wherein the first concave portion and the second concave portion are each other.
Spread outward at the joint end face where
The positioning member is formed in a wedge-shaped cross section.
Is a rectangular parallelepiped with a rhombic cross section formed in a wedge shape,
1. Insert both sides forming a diamond-shaped cross section into the second concave part by half
3. The tunnel according to claim 1, wherein
Structure of the segment for the