JP2003138896A - Segment and gripper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment capable of being easily gripped surely even when an internal surface is smooth without using a suction type erector and a gripper for gripping the segment. SOLUTION: In the segment 10 used for lining a tunnel, the above-mentioned problem is solved by using the segment with a circular plate-shaped segment body 1 and inserting hole sections 4, which are formed to a facing-side end face 2 facing the facing side of the tunnel in the segment body 1 and into which the gripper 3 gripping the segment body 1 when the segment body 1 is assembled on the inwall side of the tunnel is inserted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment for supporting a tunnel wall surface excavated by a shield tunnel method and a gripping body for gripping this segment.

[0002]

2. Description of the Related Art In recent years, shield tunnels that do not require secondary lining have been increasing in order to reduce costs. In the segment which is the lining structure of such shield tunnel, the joint member that connects the segments together, the backfill injection hole that fills the gap between the back surface of the segment and the inner wall side of the tunnel with mortar, etc. And a grip portion to be gripped during assembly. However, even in a shield tunnel without the secondary lining,
In the structure where the bolts for joints and the metal members for backfill injection holes are exposed on the inner surface of the segment, rust may occur on these metal members after long-term use, and a corrosion inhibitor or the like is applied to these metal members. There was a need.

[0003] Therefore, for connecting the segments to each other, one in which the joint member is not exposed on the inner surface of the segment has been developed, and the backfill injection into the gap between the rear surface of the segment and the inner wall side of the tunnel is directly performed from the shield machine. By injecting mortar or the like into the void, it is not necessary to provide a backfill injection hole in the inner surface of the segment.

[0004]

By the way, FIG. 2 (a)
As shown in FIG.
As described in Japanese Patent No. 273399, a technique is known in which the internal thread portion 100 is provided on the inner surface of the segment 150. In this technique, the male screw portion 102 of the segment grip metal fitting 101 is screwed into the female screw portion 100, the segment grip metal fitting 101 is fixed to the inner surface of the segment 150, and the segment grip metal fitting 101 is lifted by an erector to tunnel the segment 150. It is to be attached to the inner wall side of. However, in this grip portion, since the internal thread portion 100 is provided on the inner surface of the segment 150, after the segment 150 is assembled to the wall surface of the tunnel, the internal thread portion 100 is fixed so as not to be rusted. It was necessary to fill with an expensive material, and the filling operation was troublesome.

On the other hand, on the other hand, as shown in FIG.
The technique described in Japanese Patent Laid-Open No. 10-159497 is known. This technique is an erector that includes a plurality of suction plates 200 that grip the segments 160 by suction without providing a grip portion on the inner surface of the segment 160, and a connecting material that connects the suction plates 200. However, in this erector, since the suction accuracy of the suction plate 200 differs depending on the smoothness and the material of the suction surface on the segment 160 side, in order to prevent the segment 160 from falling,
When assembling the segment 160 on the inner wall side of the tunnel, the construction management took time and effort. Further, since it is necessary to provide a backup system for the erector when the suction pump for sucking the segment 160 fails, the erector itself needs cost.

The present invention has been made in view of the above circumstances, and a segment that can be easily and surely gripped even when the inner surface is smooth without using a suction type erector, and a segment for gripping this segment. The purpose is to provide a gripping body.

[0007]

In order to solve the above problems, the invention according to claim 1 is, for example, as shown in FIG. 1, a segment 10 used for lining a tunnel, which is an arc plate. Shaped segment body 1 and a gripping body 3 formed on the face 2 of the segment body 1 facing the face of the tunnel so as to grip the segment body 1 when the segment body 1 is assembled to the inner wall of the tunnel. And an insertion hole portion 4 into which is inserted.

According to the first aspect of the invention, the segment is reliably gripped by the gripping body by inserting the gripping body into the insertion hole formed in the end face on the face side. Therefore,
Since the internal thread portion as the grip portion is not formed on the inner surface of the segment as in the conventional case, the segment having the smooth inner surface can be easily and reliably assembled to the inner wall side of the tunnel. Also, the metal member is exposed on the inner surface of the segment,
Since the uneven portion is not formed, it is not necessary to take measures to prevent corrosion on the inner surface of the segment or to fill the uneven portion with an expensive material, so that the construction cost can be reduced.

Even if the inner surface of the segment is smooth as in the prior art, without using the suction type erector,
Since the segment can be assembled on the inner wall side of the tunnel, the time and effort required for construction management required as a measure to prevent the segment from falling can be reduced. Further, since the suction pump for sucking the segment is not required, it is not necessary to provide the erector with a backup system when the suction pump fails. Therefore, the cost of the erector itself can be reduced.

The invention according to claim 2 is, for example, as shown in FIG. 1, in the segment 10 according to claim 1, the insertion hole portion 4 is formed on the face 2 on the face side of the segment body 1.
It is characterized in that a plurality of them are provided at predetermined intervals along the circumferential direction.

According to the second aspect of the present invention, since a plurality of insertion holes are provided in the end face on the face side, the segments can be reliably held by the plurality of grips by inserting the grips into the insertion holes. The segment can be easily and surely assembled to the inner wall side of the tunnel.

According to a third aspect of the present invention, for example, as shown in FIG. 1, in the segment 10 according to the first or second aspect, the insertion hole portion 4 is opened in the segment body 1 and in the end face 2 on the face side thereof. It is characterized in that it is composed of a tubular member 5 embedded in such a manner.

According to the third aspect of the present invention, since the insertion hole portion is formed by the tubular member embedded in the segment body, the tubular member is previously formed of metal or the like,
When manufacturing the segment main body from reinforced concrete, the insertion hole can be easily manufactured by placing a cylindrical member in the mold of the segment main body and then placing concrete in the mold.

In the invention according to claim 4, for example, as shown in FIG. 1, when the segment 10 according to any one of claims 1 to 3 is assembled to the inner wall side of the tunnel by an erector, the segment 10 is gripped. The gripping body 3 for
Main body 3a attached to the erector, and this main body 3a
And an insertion portion 3b that is inserted into the insertion hole portion 4 of the segment 10.

According to the fourth aspect of the present invention, since the grip body has the main body and the insertion portion, the segment can be easily gripped by the grip body by inserting the insertion portion into the insertion hole. The load of the segment applied to the insertion portion inserted in the insertion hole portion can be reliably supported by the main body portion. Also, when a plurality of insertion parts are provided on the main body,
The load of the segment applied to each of the plurality of insertion portions can be concentratedly supported by the main body portion, and by attaching the main body portion to the erector, the labor of attaching each of the insertion portions to the erector can be saved.

According to a fifth aspect of the present invention, for example, as shown in FIG. 1, in the grasping body 3 according to the fourth aspect, the insertion portion 3b is inserted into the insertion hole portion 4 of the segment 10. It is characterized by having a function of preventing the insertion hole 4 from being pulled out when it is inserted.

According to the invention of claim 5, the insertion portion is
Since it has a function of preventing the segment from being pulled out from the insertion hole, it is possible to prevent the segment from coming off the gripping body when the segment is assembled to the inner wall side of the tunnel, and thus to prevent the segment from falling. .

According to a sixth aspect of the present invention, for example, as shown in FIG. 1, in the grip body 3 according to the fifth aspect, the insertion portion 3b of the main body portion 3a is inserted into the insertion hole portion 4 of the segment 10. Face end face 2 of the segment 10
It is characterized in that it is provided with a contact surface 3c for contacting with.

According to the invention of claim 6, by inserting the insertion portion of the grip body into the insertion hole portion of the segment,
The circumferential position of the segment with respect to the gripper is determined. Further, since the main body portion has the abutment surface that abuts the face end on the face side of the segment, the position of the segment in the tunnel axis direction with respect to the gripping body is determined by abutting the abutment face on the face end on the face side. That is, the segment is positioned with respect to the grip body. Then, the gripper is moved in the circumferential direction of the tunnel by the erector to the position where the segment is assembled, and then the gripper is moved in the axial direction of the tunnel by the erector, whereby the segment can be pushed in and assembled in a predetermined position. .

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to FIG. In FIG. 1, a segment 10 used for lining a tunnel is a segment body 1
And an insertion hole portion 4.

The segment body 1 is formed in an arc plate shape, and the end faces 6, 6 in the circumferential direction of the segment body 1 are
The segment joints 6a are connected to the other segments 50 that are adjacent to each other in the circumferential direction. Further, the face end 2 or 20 of the tunnel of the segment body 1 is provided with a ring joint 2a that is connected to another segment 55 that is adjacent in the axial direction of the tunnel, and an insertion hole portion 4 described later. Here, the ring joints 2a are provided on the respective facets 2 and 20 on the face side of the segment body 1 at three locations along the circumferential direction at predetermined intervals.

The insertion hole 4 is used for inserting the grip body 3 that holds the segment body 1 when the segment body 1 is assembled on the inner wall side of the tunnel, and faces the face of the tunnel of the segment body 1. It is composed of a tubular member 5 embedded in the face 2 on the face end so as to open in a rectangular shape. Further, the insertion hole portions 4 are provided at two places on the first face 2 on the face side of the segment body 1 so as to be sandwiched between the ring joints 2a, 2a at predetermined intervals in the circumferential direction.

The tubular member 5 is made of a steel plate, and its tip is closed. The upper surface of the inner wall of the tubular member 5 is formed substantially parallel to the inner surface of the segment. The lower surface of the inner wall of the tubular member 5 is formed in a tapered shape so as to extend from the face 2 on the face side toward the upper surface of the inner wall. Further, each side surface of the inner wall of the tubular member 5 is formed at right angles to the upper surface of the inner wall. Further, each inner wall surface of the tubular member 5 is coated with a filler that also serves as a water stop and anticorrosion measure.

Next, the gripping body 3 for gripping the segment 10 when the segment 10 is assembled on the inner wall side of the tunnel by the shield machine erector will be described. The grip body 3 includes a main body portion 3a attached to the erector and an insertion portion 3b. Here, the body part 3 is included in the erector.
A control device for controlling the position of a is attached.

The main body portion 3a is a strip-like member formed so as to extend along the face 2 on the face side of the segment 10, and the insertion portion 3b is inserted into the insertion hole portion 4 of the segment 10. At this time, a contact surface 3c that contacts the face 2 on the face side of the segment 10 is provided.

The insertion portion 3b is a rectangular bar-shaped steel material provided so as to project from the main body portion 3a, and is inserted into the insertion hole portion 4 of the segment 10 at predetermined intervals on the contact surface 3c. There are two locations. Further, the upper surface of the insertion portion 3b is formed horizontally like the tubular member 5,
The lower surface of the insertion portion 3b is formed in a tapered shape so as to extend from the distal end portion of the insertion portion 3b toward the proximal end portion. Further, each side surface of the insertion portion 3b is formed at a right angle to the upper surface thereof. And the insertion part 3b is
When the insertion portion 3b is inserted into the insertion hole portion 4 of the segment 10, it has a function of preventing the insertion portion 3b from being pulled out from the insertion hole portion 4.

The function of preventing this withdrawal is the insertion portion 3b.
Is a protrusion that, when inserted into the insertion hole portion 4 of the segment 10, protrudes from any wall surface of the insertion portion 3b and presses the inner wall surface of the tubular member 5. The projection is formed so as to project from the wall surface by a mechanism such as hydraulic pressure or a spring. When the insertion portion 3b is inserted into the insertion hole portion 4, the projection is projected from the wall surface of the insertion portion 3b. The insertion portion 3b is freely inserted into the insertion hole portion 4.
Further, in order to grip the segment 10 more reliably, the wall surfaces of the insertion portion 3b may be formed in a bellows shape as a means for increasing the friction coefficient between the insertion portion 3b and the insertion hole portion 4.

Next, a construction method for assembling the segment 10 on the inner wall side of the tunnel will be described. First, the grip body 3 in which the segment 10 to be assembled is attached to the erector
Hold by. In this case, the insertion portion 3b of the grip body 3 is inserted into the insertion hole portion 4 of the segment 10 until the contact surface 3c of the grip body 3 contacts the face 2 on the face side of the segment 10. At this time, the protruding portion of the insertion portion 3 protrudes and the insertion hole portion 4
By pressing the inner wall of the segment 10, the segment 10 is prevented from being pulled out from the grip body 3, and the segment is gripped by the grip body. Next, the gripper is moved in the tunnel circumferential direction by the erector to the position where the segment is mounted, and then the gripper is moved in the axial direction of the tunnel by the erector to push the segment and mount it in the predetermined position. In this case, the ring joint 2a and the segment joint 6a of the segment 10 are connected to the existing segments 50 and 55, respectively.
Is attached to the inner wall side of the tunnel.

As described above, according to this embodiment, the following effects can be obtained. The insertion hole portion 4 composed of the embedded tubular member 5 is
Since the cut face side end surface 2 is provided at two positions along the circumferential direction at predetermined intervals, the cut face side end face 2 of the segment 10 is inserted by inserting the respective insertion portions 3b of the grip body 3 into the respective insertion hole portions 4. The insertion portion 3b is inserted from the direction of the axial direction of the tunnel to connect the segment 10 to the two insertion portions 3b.
It can be securely held by b. Therefore, unlike the conventional case, since the internal thread portion as the grip portion is not formed on the inner surface of the segment, the segment 10 having the smooth inner surface can be easily and reliably assembled to the inner wall side of the tunnel. In addition, since the metal member is not exposed or the uneven portion is not formed on the inner surface of the segment 10, the segment 1
No need for anticorrosion measures on the inner surface of No. 0 and work for filling the uneven portion with an expensive material, so that the construction cost can be reduced.

Even if the inner surface of the segment 10 is smooth as in the prior art, without using an adsorption type erector,
Since the segment 10 can be assembled on the inner wall side of the tunnel, the time and effort required for construction management required to prevent the segment 10 from falling can be reduced. In addition, segment 1
Since a suction pump for sucking 0 is not required, it is not necessary to provide a backup system for the erector when the suction pump fails. Therefore, the cost of the erector itself can be reduced.

Since the insertion hole 4 is composed of the tubular member 5 embedded in the segment body 1, when the tubular member 5 is made of metal or the like in advance and the segment body 1 is made of reinforced concrete. In addition, the insertion hole 4 can be easily manufactured by placing the tubular member 5 in the mold of the segment main body 1 and then placing concrete in the mold.

Since the grip body 3 includes the main body portion 3a and the insertion portion 3b, by inserting the insertion portion 3b into the insertion hole portion 4, the segment 10 can be easily gripped by the grip body 3 and the insertion hole can be easily inserted. Insertion part 3 inserted in part 4
The load of the segment 10 on b can be reliably supported by the main body 3a. Further, when the main body 3a is provided with the two insertion portions 3b, the load of the segment 10 applied to each of the two insertion portions 3b can be concentratedly supported by the main body 3a, and the main body 3a can be erected. By attaching to each of the insertion portions 3b, it is possible to save the trouble of attaching each of the insertion portions 3b to the erector.

Since the insertion portion 3b has a protrusion on one of the wall surfaces of the insertion portion 3b as a function of preventing the insertion portion 3b from being pulled out from the insertion hole portion 4, the insertion portion 3b is inserted into the insertion hole portion 4 of the segment 10. It is possible to project the projection portion when it is inserted into and press the inner wall surface of the tubular member 5. Therefore, the insertion portion 3b grips the segment 10 more reliably, and the segment 10 can be prevented from falling when the segment 10 is assembled to the inner wall side of the tunnel.

The grip body 3 is inserted into the insertion hole portion 4 of the segment 10.
The position of the segment 10 in the circumferential direction with respect to the grip body 3 is determined by inserting the insertion portion 3b. Since the main body portion 3a includes the contact surface 3c that comes into contact with the face end 2 on the face side of the segment 10, the face 3c contacts the face 2 on the face side.
By abutting against, the position of the segment 10 in the tunnel axis direction with respect to the grip body 3 is determined. That is,
The segment 10 is positioned with respect to the grip body 3. Then, the gripper 3 is moved in the circumferential direction of the tunnel by the erector to the position where the segment 10 is assembled to the existing segments 50, 55, and then the gripper 3 is moved in the axial direction of the tunnel by the erector.
Pushing the segment 10 into the existing segment 50, 5
It can be attached to 5.

The segment and segment gripping body of the present invention are not limited to the present embodiment. For example, the insertion hole portion 4 is not limited to the embedded tubular member 5, and the insertion hole portion 4 may be integrally formed into a tubular shape at the time of segment production as long as the insertion portion 3b can be inserted. .

Further, after the segments 10 are sequentially assembled on the inner wall side of the tunnel, the insertion hole 4 is prevented from corroding.
You may fill this insertion hole part 4 with a filler. In that case,
A pipe for filling the insertion hole portion 4 with the filler may be provided in the insertion hole portion 4 so as to open to the face 2 on the face side. Further, the insertion hole portion 4 is not limited to the steel material and may be a plastic material or a resin material.

Further, if the insertion portion 3b can prevent the insertion portion 3b from being pulled out from the insertion hole portion 4, when the insertion portion 3b is inserted into the insertion hole portion 4, the insertion portion 3b is curved and has a cylindrical shape. For example, the inner wall of the member 5 may be pressed. Further, as long as the insertion portion 3b and the insertion hole portion 4 are provided at one or more places, any number of places may be provided. The cross-sectional shapes of the insertion portion 3b and the insertion hole portion 4 may be any of rectangular, circular, elliptical, H-shaped and the like. Furthermore, if the insertion portion 3b is rod-shaped, it may be inclined, curved, or bent.

[0038]

As described above, according to the first aspect of the present invention, the segment is reliably gripped by the gripping body by inserting the gripping body into the insertion hole formed in the end face on the face side. Therefore, the segment having the smooth inner surface can be easily and surely assembled to the inner wall side of the tunnel. Also,
Since the metal member is not exposed on the inner surface of the segment or the uneven portion is not formed, it is not necessary to take measures to prevent corrosion on the inner surface of the segment or to fill the uneven portion with an expensive material, which reduces the construction cost. Can be planned.

Further, even if the inner surface of the segment is smooth, it is possible to assemble the segment on the inner wall side of the tunnel without using a suction type erector. Will be reduced. Further, since the suction pump is not required, it is not necessary to provide the erector with a backup system when the suction pump fails. Therefore, the cost of the erector itself can be reduced.

According to the second aspect of the present invention, the same effect as that of the first aspect can be obtained, and since a plurality of insertion holes are provided on the end face on the face side, the insertion holes are respectively provided. By inserting the grip body, the segment is securely gripped by the plurality of grip bodies, and the segment can be easily and surely assembled to the inner wall side of the tunnel.

According to the third aspect of the invention, the same effect as that of the first or second aspect can be obtained, and the insertion hole portion is formed of a cylindrical member embedded in the segment body. By forming a tubular member in advance and placing the tubular member in the mold of the segment main body when manufacturing the segment main body, and then placing concrete in the mold, it can be easily inserted. Holes can be manufactured.

According to the invention described in claim 4,
Of course, the same effect as in any one of 3 is obtained, and since the grip body has the main body and the insertion portion, the segment can be easily formed by the grip body by inserting the insertion portion into the insertion hole portion. In addition to being able to grip, the load of the segment applied to the insertion portion can be reliably supported by the main body portion. Also, when a plurality of insertion parts are provided on the main body in a protruding manner, the load of the segments applied to these insertion parts can be supported by the main body, and by attaching this main body to the erector, each of the insertion parts can be attached to the erector. You can save the trouble of installing.

According to the fifth aspect of the invention, the same effect as in the fourth aspect can be obtained, and the insertion portion has a function of preventing the insertion portion from being pulled out. It is possible to prevent the segments from falling.

According to the invention of claim 6, not only the same effect as that of claim 5 can be obtained, but also by inserting the insertion part of the gripping body into the insertion hole of the segment, the segment with respect to the gripping body can be obtained. The circumferential position of is determined. Further, since the main body portion has the abutment surface that abuts the face end on the face side of the segment, the position of the segment in the tunnel axis direction with respect to the gripping body is determined by abutting the abutment face on the face end on the face side. Then, the gripper is moved in the circumferential direction of the tunnel by the erector to the position where the segment is assembled, and then the gripper is moved in the axial direction of the tunnel by the erector, whereby the segment can be pushed in and assembled in a predetermined position. .

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention and showing a state when a segment is assembled to an inner wall side of a tunnel.

FIG. 2 is a perspective view showing a conventional method of gripping a segment. (A) is a perspective view showing a gripping method for gripping a segment by screwing an external thread portion of the gripping portion onto the inner surface of the segment. (B) is a perspective view showing a gripping method of gripping a segment by suction.

[Explanation of symbols]

1 segment body 2 Face end 3 gripping body 3a Main body (holding body) 3b Insertion part (holding body) 3c Contact surface (holding body) 4 insertion hole 5 Cylindrical member 10 segments

Claims (6)

[Claims] 1. A segment used for lining a tunnel, comprising an arc plate-shaped segment main body, and the segment main body formed on the end face of the segment main body facing the face of the tunnel. A segment having an insertion hole into which a grip body for gripping the segment main body is inserted when the segment body is assembled to the inner wall side. 2. The segment according to claim 1, wherein a plurality of the insertion hole portions are provided at a predetermined interval along a circumferential direction on an end face of the segment main body on the face side. 3. The segment according to claim 1 or 2, wherein the insertion hole portion is formed of a tubular member embedded in the segment body so as to open at a face end on the face of the segment. The segment to be. 4. A body for holding the segment according to any one of claims 1 to 3 when the segment is assembled to the inner wall side of the tunnel by an erector, the body being attached to the erector, and the body. A gripping body that is provided so as to project into the portion and is inserted into the insertion hole portion of the segment. 5. The grasping body according to claim 4, wherein the insertion portion has a function of preventing the insertion portion from being pulled out when the insertion portion is inserted into the insertion hole portion of the segment. A gripping body characterized by being present. 6. The gripping body according to claim 5, wherein the main body portion includes an abutting surface that abuts a face end of the segment when the insertion portion is inserted into the insertion hole portion of the segment. A gripping body characterized by being present.