JP2644095B2 - Segment for tunnel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to
A first end face and a second end face for connecting adjacent segments.
Two end faces and segments adjacent in the circumferential direction of the tunnel
It has a third end face and a fourth end face for connecting each other,
Tunnel connecting adjacent segments with a connector
For segment.

[0002]

2. Description of the Related Art Conventionally, two concrete segs are connected.
For example, the joint structure for connecting the
As disclosed in JP-A-2-132294,
To reduce segment loss and increase segment strength.
To maintain the connection bolt and facilitate the connection work of the connection bolt
The connecting bolt from the inner peripheral side of the tunnel of one segment.
Is inserted obliquely to connect the segments.
there were. Also disclosed in Japanese Utility Model Application Laid-Open No. 51-132809.
Easy positioning of segments on the joint end face
Connection bolt insertion part to prevent misalignment
In some cases, a fitting projection and a fitting recess are provided.

[0003]

SUMMARY OF THE INVENTION However, for example,
According to the technology disclosed in JP-A-2-132294,
The end face of each segment to be formed is simply a plane
Therefore, when fastening the connecting tool, each segment
In some cases, the positions were displaced in the radial direction of the tunnel.
That is, as described above,
Since the insertion direction of the connection tool does not match, the connection
When a tensile force is applied to the knot, a part of the tensile force is
The component force in the radial direction of the tunnel along the end face of the segment
Because it becomes. According to the above conventional structure,
If a tensile force is applied to the connecting
After the construction is completed, external force due to an earthquake
When used, the segments are aligned in the tunnel radial direction.
Shear force acting on the connecting device
And In this case, the coupling tool may be damaged
There is . Further, the connecting fixture fixing portion is a simple tubular member.
Because it was only buried in the segment
When a shear force acts on the
Part of the concrete surrounding the fixing part is connected
Is pressed intensively by the fixture
Segment is damaged, and the segments are in a healthy connection
Could not be maintained. Meanwhile, actually open
According to the technique disclosed in Japanese Patent Laid-Open No.
Reinforce the periphery of the through hole with a metal fitting, and
Has a fitting projection or a fitting recess.
Partially compensates for the above-mentioned disadvantages according to Japanese Unexamined Patent Publication No. 2-132294.
I was able to. However, the official public 51-132809
According to the technology of the report, the receiving bracket is attached to each connecting bolt.
It is provided individually, and the adjacent brackets are separated
So, for example, a staggered tunnel
Segments that are adjacent to each other in the tunnel circumferential direction
When external forces are applied to the
Is a concentrator located between the adjacent metal fittings.
The stress concentrates on the reed part and the concrete
There was a risk of damage to the seat part. The present invention
Eliminates the above disadvantages of existing segments and
Connection work can be easily performed from the inner space side of the tunnel.
In addition, misalignment between segments occurs during the connection work.
It prevents the segment from being damaged near the connection,
And the transmission of shearing force etc.
The purpose is to provide a segment that can be performed reliably.

[0004]

In order to achieve the above object, in order to achieve the above purpose
The characteristic configuration of the tunnel segment at the beginning is
The end face and the second end face can be fitted to each other over their entire length.
Forming a convex tenon and concave groove
And the third end face and the fourth end face over the entire length thereof.
The tenon and the groove are formed separately, and the first end is formed.
The center of the surface and the center of the second end face have the tenon or
When have the provision of the central protective member which is matched to the shape of the groove
Both ends of the first end face and both ends of the second end face
The end portion holding-matched to the shape of the prior SL tenon or the groove
A protective member, wherein the central protective member on the first end face is
The other two segments longitudinally adjacent to each other
It can be connected to two of the end protection members provided on the second end surface.
The end protection member of the first end surface may be a tunnel.
The second end face of another segment adjacent in the longitudinal direction is provided on the second end face.
The center protection member can be connected to the center protection member.
The connector can be inserted into the member and the end protection member.
Function opening, and the segment body from the opening
And a connector insertion hole extending over the inner side surface of the tunnel.
The connecting member is fixed to the protection member and the end protection member.
Providing a connectable fixture fixing portion, wherein the connectable
The first end is inserted through the insertion hole from the inner side surface of the tunnel.
Protruding from the surface and provided on the second end face of another segment
That it is configured to be fixed to the connecting fixture fixing part
The actions and effects are as follows.

[0005]

That is, as in the present invention, the first end face and the second end face are provided.
And a convex shape that can be fitted to each other over its entire length.
A tenon and a concave groove are formed separately, and the third end face is formed.
And the fourth end face, the tenon and the groove over the entire length thereof.
And divide and form the connection between segments
By performing the configuration while fitting the and the groove, for example,
Adjacent segments are opposite in the radial direction of the tunnel
The displacement can be reliably prevented, and both
The connection state between the cements can be strengthened.
In addition, shear force was applied between both connected segments.
In this case, the shearing is performed over substantially the entire length of the end face of the segment.
Identify segment end faces because they will resist shear
The shear stress acting on the location can be reduced. Sa
Furthermore, when the segments are assembled in a staggered manner,
Pay attention to where the two segments are combined.
The middle of the first end face of the fixed segment body is
A central protective member is provided, and the central protective member
Adjacent to the specific segment body in the longitudinal direction of the tunnel
The other two segments are provided on the second end face.
Two of the end protection members are connected. So, for example,
Shear on two adjacent segments in the circumferential direction
Even if a force is applied in the abovementioned central protective member is present child
And the shear force increases the concrete
The shear forces are not directly transmitted to the
Can be transmitted to the concrete part. this
As a result, it is possible to prevent segment breakage near the joint,
A solid connection can be obtained. In addition, the ton of the present invention
The segment for the tunnel connects the connecting tool from the inner side of the tunnel.
Since it is configured to be inserted toward the first end face or the like, an example
For example, insert the connector along the axis of the tunnel
Compared with general connection structure, insertion work of connecting
It can be done easily. Also, connect the coupling to the axis of the tunnel.
In a general configuration where the connector is inserted along the direction,
Pocket had to be drilled in the segment
However, in the tunnel segment of the present invention,
No pockets are required, so segment cross-section
And maintain high segment strength
Can be

[0006]

As described above, the tunnel segment according to the present invention can be used.
Segment, link the segment
Easy to access from the space side and adjacent segments
Since the mating is made on the whole of each end face,
It is difficult for misalignment between segments to occur in the tunnel structure.
Strong against shear force acting between segments even after construction
Resistance to prevent segment breakage near the joint.
As well as construct a sturdy tunnel wall with high bending rigidity.
Can be

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 6, a tunnel H is constructed by connecting and fixing a plurality of tunnel segments 1 (hereinafter simply referred to as segments) 1 according to the present invention to each other to form a lateral hole peripheral wall X. In constructing the tunnel H, a cutter 2A is provided at the tip, and the shield machine 2 is moved along the longitudinal direction while the cutter 2A is moved.
A is rotated to excavate underground, and the segments 1 are sequentially installed in the excavated portion.

As shown in FIG. 1, the segment 1 is made of precast concrete and has a curved shape. Of the four end faces, two adjacent end faces at right angles are provided with the adjacent segment 1. Convex tenon for mating with
A is formed, and a concave groove 1B that fits into the tenon 1A formed on the adjacent segment 1 is formed on the other two end faces adjacent to each other at right angles. For example, in the longitudinal direction of the tunnel
The end face for connecting adjacent segments 1
Adjacent in the circumferential direction of the tunnel as the first end face and the second end face
The end face for connecting segments 1 is the third end face
And the fourth end face, the first end face and the third end face have convex shapes.
A tenon 1A is formed, and a concave groove 1 is formed on the second end face and the fourth end face.
Form B. Then, in the above-described lateral hole peripheral wall X,
The tenon 1A and the groove 1B of the adjacent segments 1 are fitted and connected to each other, so that the shear force acting on the joint surface between the segments is reliably transmitted, and the plurality of segments 1 are combined. It is configured to improve the bending stiffness of the entire tunnel.

Further, protecting members 5 and 7 made of a metal plate for protecting the tenon 1A and the groove 1B are respectively provided on a part of each of the tenon 1A and the groove 1B, and a connecting tool insertion hole for inserting a connecting tool with the adjacent segment 1 is provided. 3 is opened to one protection member 7, and a connector fixing portion 5 </ b> D for fixing the connector 4 inserted through the connector insertion hole 3 of the adjacent segment 1 is connected to the other protection member 5. The connecting member receiving portion 5A of the connecting member fixing portion 5D is integrally connected to be opened. In particular, connect segment 1 in the longitudinal direction of the tunnel.
Provided on the first end face and the second end face for joining
The protective members 5 and 7 are provided at the center of these end faces.
Is called the central protective member, and those provided at both ends are
It is referred to as a part protection member.

As shown in FIG. 2, the connector insertion hole 3 is bored in the body of the segment 1, one end 3A of which is opened to the end face of the segment 1 as described above, and the other end 3B is tunneled. The opening is formed on the inner side surface, and the overall arrangement posture is an inclined posture inclined toward the inner side of the tunnel H with respect to the inner peripheral surface of the segment 1 main body.

[0011] At the ends 3A and 3B of the connector insertion hole 3,
One end 3B formed on the surface of the segment 1 on the inner side of the tunnel H is opened in a notch 6 formed on the inner peripheral surface of the segment, so that the fixing tool can be easily fixed and installed at this end 3B. It is made possible so that the end of the fixedly installed connector does not protrude inward of the tunnel H. Further, a protection member 7 is attached to the other end 3A which is open to the end face of the segment 1.

The protection member 7 is a protection member main body 7A which is a plate material conforming to the shape of the tenon 1A or groove 1B formed on the end face of the segment 1, and an anchor for fixing the protection member main body 7A to the segment 1. It comprises a guide cylinder 7C for guiding the connecting member 4 inserted through the portion 7B and the connecting hole 3 (FIG. 2 shows a tenon-shaped segment end face).

On the other hand, as shown in FIG. 3, the protection member 5 provided on the other end surface of the segment 1 has the groove 1B formed on the end surface of the segment 1 similarly to the protection member main body 7A of the protection member 7 described above. It is composed of a protective member main body 5B which is a plate material conforming to the shape, an anchor portion 5C for fixing the protective member main body 5B to the segment, and a fixing cylinder 5d for inserting and fixing the connecting member 4 (FIG. The end face of the segment having a groove is shown).

Then, as shown in FIG.
The direction in which the fixed cylinder 5d on the B side is disposed in the longitudinal direction is inclined toward the inner side of the tunnel H with respect to the inner peripheral surface of the segment 1 main body.
The bolt, which is the connecting tool 4 inserted along the connecting tool insertion hole 3 inclined in the direction toward the inner side of the tunnel H with respect to the inner peripheral surface of the main body of the segment 1 can be received in the fixed cylinder 5d. It has become.

The fixed cylinder 5d is provided on its inner periphery with a female screw which is screwed with a male screw provided on the tip end of the bolt.
A connecting member fixing portion 5D capable of connecting and fixing adjacent segments by screwing a bolt to the fixing cylinder 5d is formed.

In order to assemble the segments 1 in a staggered manner, two connecting holes 3 are provided at substantially the center of the rear end of the tunnel H, as shown in FIG. At one location, and at a location substantially at the center of one end face of the existing segment 1 that faces the end face of the existing segment 1 along the circumferential direction of the tunnel H perpendicular to the end face. On the other hand, the connector receiving port 5A of the connector fixing portion 5D paired with the one end 3A of the connector insertion hole 3 is provided on the end face opposite to the end face of the one end 3A of the connector insertion hole 3. is there. Then, when assembling the segments 1 in a staggered manner, the segments 1 can be connected and fixed to the adjacent segments 1 via the connecting tools 4 respectively.

According to the above configuration, one end 3 of the connector insertion hole 3 for inserting the connector 4 such as a bolt with the existing segment 1 is inserted.
A is opened at the end face and the other end 3B is opened at the notch 6 on the face on the inner side of the tunnel. Therefore, when assembling the segment 1, as shown in FIG. After fitting and connecting with the fitting portion of the tenon 4A or the groove 4B formed on the end face of the first connector 1, the connecting tool is inserted from one opening of the connecting tool insertion hole 3 of the notch 6 formed on the inner side of the tunnel H. Can be done.

On the other hand, since the opening direction of the connecting member receiving port 5A is inclined toward the inner side of the tunnel H with respect to the inner peripheral surface of the segment 1 main body, the existing segment 1 is inserted through the connecting member receiving port 5A. A new segment 1 can be connected to the existing segment 1 by fixing the connecting tool 4 to the connecting tool fixing portion 5 of the present invention.

That is, the working space for connecting the segments 1 with the connecting tool 4 is not the space between the shield machine 2 located in front of the segment 1 and the tip end surface of the succeeding segment 1, but the inner periphery of the segment 1. It can be a portion on the inner side of the tunnel H than the surface.

Therefore, in the assembling operation of the segment 1, it is not necessary to secure a wide space between the rear end of the shield machine 2 and the front end surface of the segment 1 which is lining the rear thereof. The lining work can be started, the collapse of the ground can be prevented at an early stage, and the work from a wide portion on the inner side of the tunnel H can be performed, so that the connection work in the segment 1 can be easily performed.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a staggered segment.

FIG. 2 is a cross-sectional view around a coupling tool insertion hole.

FIG. 3 is a cross-sectional view of the vicinity of a fixing portion of a coupling tool.

FIG. 4 is a sectional view showing a connecting portion between a segment and an adjacent segment.

FIG. 5 is a plan view of a segment.

FIG. 6 is a sectional view of a tunnel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Segment 3 Connector insertion hole 3A One end of connector insertion hole 4 Connector 5 Connector fixing part 5A Connector receiving port H tunnel

Claims (1)

(57) [Claims] 1. Segments adjacent in the longitudinal direction of a tunnel
(1) A first end face and a second end face for connecting each other, and
And the segment (1) adjacent in the circumferential direction of the tunnel
A third end face and a fourth end face for connecting the joints, and connecting the adjacent segments (1) with the connecting tool (4).
To a segment tunnel, wherein the first end surface and the second end surface, over its entire length
A convex tenon (1A) and a concave groove having shapes that can be fitted to each other.
(1B) and the third end face.
And the fourth end face along the tenon (1
A) and the groove (1B) are divided and formed, and a central part of the first end face and a central part of the second end face are provided with:
Match the shape of the tenon (1A) or the groove (1B)
A central protective member (5, 7) is provided.
The tenon is attached to both ends of the end face and both ends of the second end face.
(1A) or an end conforming to the shape of the groove (1B)
A protection member (5, 7) is provided, and the central protection member (5, 7) on the first end face is a tunnel.
In front of the other two longitudinally adjacent segments (1)
Two of the end protection members (7, 5) provided on the second end surface;
And the end protection member of the first end face.
(5, 7) is the other segment adjacent in the longitudinal direction of the tunnel.
The center protection member provided on the second end face of the component (1)
(7, 5), the center protection member (5, 7) and the end protection member.
(5, 7) has an opening through which the connecting tool (4) can be inserted.
And the opening of the segment (1)
A connector insertion hole (3) extending over the inner side surface of the channel, wherein the central protection member (7, 5) and the end protection member
(7, 5) includes a connector capable of fixing the connector (4).
A fixing portion is provided, and the connecting tool (4) is moved to the connecting tool insertion hole (3).
Through the inner end surface of the channel and project from the first end surface,
To the connector fixing portion provided on the second end face of the other segment.
Tunnel segment configured to be fixed.