JP3421487B2 - Segment assembly method - 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 assembling method for constructing a tunnel by excavating a natural ground by a shield machine, and more particularly, to a segment grip capable of moving at least one ring segment in the tunnel axial direction. The present invention relates to a segment assembling method suitable for assembling a segment by a shield machine equipped with an erector device having a section.

[0002]

2. Description of the Related Art When excavating the ground with a shield machine to construct a tunnel, a plurality of segments are sequentially assembled in a ring shape in order to secure the inside of the tunnel. First, a segment to be assembled from now on (hereinafter referred to as an assembly segment) is transferred from the rear of the tunnel to a position where the segment gripping part installed in the erector device can be grasped by using a carrier device such as a hoist, and then the erector device. The assembly segment is gripped by the segment gripper using the to position the assembly segment at a desired position with respect to the existing segment, and then the assembly segment is bolted to the existing segment to move the plurality of assembly segments from the lower part to the upper part of the tunnel. Assemble the segment ring. Therefore, the segment assembling work is roughly divided into two works, that is, the assembling segment carrying work and the pure segment assembling work of gripping, positioning and bolting the assembling segment. Generally, one of the above two works is performed. Are collectively referred to as the segment assembly work.

In the erector device used for assembling the above-mentioned segment, the assembled segment is gripped by the segment gripping portion as described above. Generally, the segment gripping portion has a short movable distance in the tunnel axis direction, You cannot move one ring. When assembling a segment using such an erector device, first,
When assembling the segment of the piece, transport the assembly segment from the rear of the tunnel with a hoist, and place this assembly segment in the space below the segment grip that occurs when the shield jack installed on the shield machine is pulled. Then, the segment gripping portion is moved to the mounting position to grip the assembly segment, the assembly segment is positioned at a desired position with respect to the existing segment, and the assembly segment is bolted at the position. When assembling the second and subsequent segments, the assembly segment conveyed by the hoist is placed on the segment of the first piece, and then the assembly segment is gripped, positioned and bolted in the same manner as above.

On the other hand, as an erector device, there is one in which the segment gripping portion is movable in the rear direction of the tunnel by at least one segment ring, as described in, for example, Japanese Patent Application Laid-Open No. 2-88893. This erector device is provided with a cantilevered guide beam extending in the axial direction of the tunnel machine on a pair of left and right columns attached to the support ring of the tunnel machine, and a ring-shaped drum is provided on this guide beam. By disposing the segment grips, the segment grips can be moved to the position of the existing segment ring.

[0005]

However, the above-mentioned prior art has the following problems. As described above, when the segment is assembled using the erector device having the general segment gripper that can move in the tunnel axis direction, the segment of the first piece is, of course, assembled during segment assembly of the first piece. Since the segment has not been assembled yet, the transport and placement of the next segment of the second piece is performed after the assembly of the segment of the first piece. During segment assembly of the second piece, the segment grip is located at the bottom of the tunnel,
When the next segment of the third piece is attempted to be transported and placed, the segment collides with the erector device, and therefore the segment of the third piece cannot be transported and placed on the segment of the first piece. Further, depending on the diameter of the segment ring to be assembled and the number of segment divisions, the next segment may not be conveyed even during the segment assembly of the third piece and the fourth piece. Therefore, it is necessary to convey the assembly segments arranged under these tunnels after the assembly of the previous segment is completed, and as a result, the work efficiency of assembling the segments is poor and the assembly of the segments takes time. .

On the other hand, in the case of assembling the segments by using the erector device described in Japanese Patent Laid-Open No. 2-88893, in which the segment gripper is movable in the tunnel rearward direction by at least one segment ring, the above-mentioned method is used. As described above, since the segment gripper can move to the position of the existing segment ring, it is not described in the above publication, but by mounting the assembled segment conveyed by the hoist on the segment of the existing segment ring, the assembly of the segment is performed. Even if the next segment is conveyed therein, the conveyed assembly segment does not collide with the erector device, and thus the next segment can be conveyed and placed during the assembly of the segment. However, in this case, it is necessary to move the segment gripper in the tunnel axis direction by about one segment more than in the case of assembling the segments using the above-described general erector device having the segment gripper, The segment gripper takes a long time to move to grip the assembled segment, and as a result, it takes time to assemble the segment.

An object of the present invention is to improve the work efficiency of segment assembly when assembling segments by using an erector device having a segment gripper that can move at least one segment ring in the tunnel axis direction.
An object of the present invention is to provide a method for assembling a segment that can shorten the time for assembling the segment.

[0008]

The present invention adopts the following constitution in order to achieve the above object. That is, a transport device for transporting the assembled segment from the rear side of the tunnel to the front side and a segment gripper that can move at least one segment ring in the tunnel axial direction are provided, and the assembled segment transported by the transport device is handled by the segment gripper. In the segment assembly method of assembling the segment ring by assembling a plurality of assembly segments from the lower part of the tunnel to the upper part by the shield machine equipped with the erector device for gripping and positioning at a desired position with respect to the existing segment, The segment is transferred from the rear of the tunnel to the position of the existing segment ring at the forefront and placed on the lower segment of the existing segment ring, and then the segment grip of the erector device is moved to the position of the existing segment ring, and the assembly segment concerned. To Lifting and, by assembling and positioning the assembled segments in a desired position relative to the existing segment, a first step of assembling a plurality of segments to the tunnel bottom,
After assembling the plurality of segments in the first step, the assembled segment is transferred from the rear of the tunnel to the position of the segment ring being assembled and placed on the lower segment of the segment ring, and then the segment grip of the erector device. To the segment assembled in the first step by moving the part to the position of the segment ring during assembly, gripping the assembly segment, and positioning and assembling the assembly segment at a desired position with respect to the existing segment. A second step of continuously assembling a plurality of segments to complete the segment ring.

In the above, in the first step, the assembly segment is positioned by transferring the assembly segment from the rear of the tunnel to the position of the frontmost existing segment ring and mounting it on the lower segment of the existing segment ring. Even if the next assembly segment is transferred from the rear of the tunnel while the bolts are being fastened, the transferred assembly segment does not collide with the erector device, and the assembly segment is transported and the assembly segment is gripped and positioned. -The pure segment assembly work of bolt fastening can be performed in parallel. Further, in the second step, by transferring the assembly segment from the rear of the tunnel to the position of the segment ring being assembled and mounting it on the lower segment of the segment ring,
The assembly segment transfer work and the pure segment assembly work can be performed in parallel, and the first distance for moving the segment grip of the erector device in the tunnel axis direction is the first.
The segment 1 ring can be shortened as compared with the step (1), and the movement time required for gripping the assembled segment of the elector device can be shortened. As described above, the work efficiency of segment assembly is improved, and the segment assembly time is shortened.

In the method for assembling the above segment, preferably, the transport device is a substantially L-shaped segment suspending portion extending forward in the tunnel axial direction, and in the first and second steps, the above The L-shaped conveying device directly conveys and mounts the assembled segment onto the lower segment of the existing segment ring and onto the lower segment of the segment ring being assembled.

[0011]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a segment assembling apparatus used in the segment assembling method of the present embodiment. FIG. 1 is a side view of the segment assembling apparatus, and the left side of the drawing shows the cutting face direction (tuning direction),
The right side shows the tail direction (tunnel entrance direction). FIG. 2 is a view of the segment assembling apparatus (however, only the erector 1 described later) is viewed from the tail side toward the cutting face.

The segment assembling apparatus has an erector 1, which is arranged at a rear portion of a shield machine main body 3 having a plurality of shield jacks 2. The erector 1 has a slewing wheel 5, and the slewing wheel 5 is rotatably attached via a guide roller 6 supported by a bearing holder 7 attached to the shield machine main body 3 and attached to the bearing holder 7. The turning motor 8 turns to turn via a pinion and a ring gear (not shown).

A cylindrical turning drum 9 is fixed to the turning wheel 5, and the linear bearing 1 is attached to the turning drum 9.
A pair of left and right arms 13 are attached via 1. The front and rear jacks 15 are attached to the slewing wheel 5 and the arm 13.
3 is guided by the linear bearing 11 and can slide in the tunnel front-rear direction, that is, in the X-axis direction (tunnel axis direction) in the figure.

A pressing frame 19 is attached to the arm 13 via a guide rod 17, and a pressing jack 21 is attached to the arm 13 and the pressing frame 19, and the pressing frame 19 is attached to the guide rod 17 by expansion and contraction of the pressing jack 21. Guided, it becomes possible to slide in the vertical direction of the tunnel, that is, in the Z-axis direction (tunnel radial direction) in the figure.

A pitching frame 23 is attached to the pressing frame 19 via a pin 21 of a pitching correction mechanism, and left and right frames 27 are attached to the pitching frame 23 via linear bearings 25. Left and right jacks 29 are attached to the pitching frame 23 and the left and right frames 27.
Left and right frames 27 are linear bearings 25 due to expansion and contraction of
Guided by, it becomes slidable in the lateral direction of the tunnel, that is, in the Y-axis direction (tunnel radial direction) in the figure.

A pitching jack 31 is attached to the pressing frame 19 and the pitching frame 23,
Due to the expansion and contraction of the pitching jack 31, the pitching frame 23 can rotate (pitch) around the pin 21. Further, a gripping frame (segment gripping portion) 3 is attached to the left and right frames 27 via a posture correction mechanism (not shown).
3, the gripping frame 33 can be yawed and rolled by expanding and contracting a yawing jack and a rolling jack (not shown).

With the above structure, the grip frame 33 rotates in the circumferential direction of the tunnel, moves in the X-axis direction, moves in the Y-axis direction,
Z-axis movement, X-axis rotation, Y-axis rotation, Z
Rotation around the axis is possible. Here, the gripping frame 33
Is movable in the X-axis direction by one segment or more. The swing motor 8, the front and rear jacks 15, the pressing jacks 21, the left and right jacks 29, the pitching jacks 31, the yawing jacks (not shown), and the rolling jacks (not shown) are erectors not shown for manual operation by an operator. Driven by the pendant switch for. Further, these actuators are collectively referred to as 7-axis actuators.

The gripping frame 33 is provided with a gripping device 33a for gripping a segment (hereinafter referred to as an assembly segment) S to be assembled.
3a is called a twist lock type, for example, as shown in FIG.
As shown in FIG. 5, the gripping device 33a is prevented from coming off from the assembly segment S by inserting it into the slotted gripping hole Sh formed on the assembly segment S and rotating it 90 degrees inside the gripping hole Sh. The gripping frame 33 has a gripping device 33a.
A gripping motor (not shown) for rotating the motor is attached, and this gripping motor is driven by a gripping device pendant switch (not shown) for the operator to manually operate. Note that the gripping device 33a is not limited to the above-described one. For example, when a female screw is vacant on the assembly segment, a male screw is provided, and the male screw is rotated to the female screw on the assembly segment. However, the assembly segment may be gripped by screwing.

Further, the segment assembling apparatus has a substantially L-shaped carrier device 51, and the carrier device 51 moves in the tunnel axis direction along a carrier beam 50 which is a rail for the carrier device. The carrier beam 50 has its front end fixed to the in-machine deck 48 fixed to the shield machine body 3 by penetrating the swiveling drum 9, and its rear end fixed to a rear deck (not shown). In addition, between the in-flight deck 48 and the rear deck,
It is connected by a rear trolley towing member 49 that pulls the rear deck. The above-described shield jack 2 installed in the shield machine main body 3 is driven by an operator operating an operation panel (not shown) provided on the in-machine deck 48.

The transport device 51 includes a traveling body 53 that travels along the transportation beam 50, a transportation frame 55 attached to the lower portion of the traveling body 53, and a guide rod 57 at the face end of the transportation frame 55 on the cutting face side. And a grip frame 59 for suspending the assembly segment S. Here, the transport frame 55, the guide rod 57, and the gripping frame 59 form a segment suspending portion that extends forward in the tunnel axial direction.

The traveling body 53 has wheels 53a and wheels 53a.
A traveling motor (not shown) for traveling along the carrier beam 50 is attached. A guide 5 for guiding the guide rod 57 up and down is provided on the transport frame 55.
5a, a winding device 55b that winds the wire 61 attached to the gripping frame 59 by driving a winding motor (not shown), and a guide roller 55c that changes the direction of the wire 61. The winding device 55b rotates the wire 61. The winding moves the gripping frame 59 up and down. The gripping frame 59 is provided with a gripping device 59a for gripping the assembly segment S. The structure of the gripping device 59a is the same as that of the gripping device 33a shown in FIG. The assembly segment S can be gripped by being rotated by the motor. Further, the grip frame 59 is configured so that it can be moved only in the tunnel vertical direction by restricting the tunnel front-rear direction and the tunnel left-right direction by the guide rod 57 and the guide 55a. The traveling motor, the hoisting motor, and the gripping motor (not shown) are driven by a carrier device pendant switch (not shown) that is manually operated by an operator.

A segment assembling method using the segment assembling apparatus configured as described above will be described. Figure 4
Shows an example of the assembly pattern of the segment 1 ring.
This figure is an example when the number of segment divisions is 8 pieces,
The K segment assembled at the end of the ring and this K
It consists of two B segments (B1 segment, B2 segment) on both sides of the segment and five other A segments (A1 segment, A2 segment, A3 segment, A4 segment, A5 segment). These segments are A3, A2, A4, A1, A5, B
Assemble in the order of 1, B2, K. Further, the assembly segment S transported by the transport device 51 is placed at the position shown in the figure below the tunnel. In FIG. 4, A3 segment and A2 of the existing segment ring described later are shown.
The one placed on the segment is shown.

The operation of assembling the segment 1 ring will be described with reference to the flowchart of FIG. First step 15
1, the operator moves the gripping device 59a of the gripping frame 59 of the transporting device 51 by a pendant switch for transporting device (not shown) on the rear deck (not shown), and the first piece segment (A3 segment) S After the gripping frame 59 is gripped by the gripping frame 59, the hoisting device 55b of the transport frame 55 is moved to raise the gripping frame 59 to lift the assembly segment S thereof. Subsequently, in step 152, the operator moves the wheels 53a of the traveling body 53 by the pendant switch for the transport device to run the transport device 51, and the assembly segment S is set to P1 shown in FIG.
Position, that is, the segment located at the bottom of the tunnel of the existing frontmost segment ring (lower segment)
Transfer so that it is above the S * position. Then step 15
3, in the vicinity of the erector 1, the operator moves the hoisting device 55b of the carrying frame 55 by the carrying device pendant switch to lower the gripping frame 59, and as shown in FIG.
Place directly at position 1. Then in step 154,
The operator moves the hoisting device 55b of the carrier frame 55 and the wheels 53a of the traveling body 53 by the pendant switch for the carrier device to retract the carrier device 51 to the rear of the tunnel. Here, the work of the above steps 151 to 154 is referred to as a first piece segment transfer work.

Subsequently, in step 101, the operator drives the 7-axis actuator (described above) with a pendant switch for erector (not shown) to assemble the gripping frame 33 of the erector 1 as shown by an arrow in FIG. After moving to the grippable position of S, the gripping device 33a of the gripping frame 33 is moved by the gripping device pendant switch (not shown) so that the assembly segment S is gripped by the gripping frame 33. Subsequently, in step 102, the operator drives the 7-axis actuator with the pendant switch for the erector to drive the grip frame 3 of the erector 1.
4 in the segment ring position where the assembly segment S is assembled adjacent to the existing segment ring.
It is moved so as to come to the predetermined assembly position shown in (is roughly positioned).

Subsequently, in step 107, the operator determines whether the segment S currently being assembled is the eighth piece segment (K segment), and if it is not the eighth piece segment, steps 103 to 105 and step 201 described later are executed. Up to 207 are performed in parallel, and in the case of the eighth piece segment, only the operations of steps 103 to 105 are performed.

In step 103, the operator drives the 7-axis actuator by the pendant switch for the erector to mount the gripping frame 33 of the erector 1 on the assembly segment S so that the assembly segment S can be bolted to the existing segment adjacent thereto. Move to (fine position). Then, in step 104, the operator extends the shield jack 2 rearward by the operation panel (not shown) on the in-machine deck 48 and presses the assembly segment S against the existing segment ring. Subsequently, in step 105, the operator manually inserts bolts into the bolt holes of the assembly segment S and the existing segment, fastens the bolts with nuts, and then proceeds to step 106. At this time, when the bolt fastening work of the first piece segment (A3 segment) is completed, it is arranged at the position P3 shown in FIG. Note that the work of the above steps 101 to 105 is generally referred to as a pure segment assembling work with respect to the segment carrying work, but here, it is simply a segment assembling work.

When it is determined in step 107 that the segment S currently being assembled is not the segment (K segment) of the eighth piece, in parallel with the above steps 103 to 105, the following steps 201 to 207 are performed. That is, the segment transfer work for the second and subsequent pieces is performed.

In step 201, the operator determines that the segment S currently being assembled is the first to third piece segment (A3 segment, A2 segment, A4 segment).
That is, it is determined whether the assembly segment S to be transported is a segment of 2 to 4 pieces (A2 segment, A4 segment, A1 segment), and the assembly segment S to be transported is a segment of 2 to 4 pieces. Determines that the mounting position of the assembly segment S is the P1 position shown in FIG. 1 in the step 202 as in the case of the first piece, and the assembly segment S to be conveyed has 2 to 4 positions.
If it is not the piece segment, the mounting position of the assembly segment S is determined to be the P2 position shown in FIG. 1, that is, the position on the 1st and 2nd segment (A3 segment, A2 segment) in step 203.

Then, in step 204, the assembly segment S is lifted in the same manner as in the above-described step 151, and in step 205, the assembly segment S is processed in the step 202 or step 203 in the same manner as in the above-mentioned step 152.
It is transferred to the position above the mounting position determined in step 206, and then step 206
At step 153, the assembly segment S is directly placed on the mounting position determined at step 202 or step 203 by the same method as at step 153, and then at step 207, the transport device 51 is moved by the same method as at step 154. Is evacuated to the rear of the tunnel, and then the process proceeds to step 106.

In step 106, the operator determines whether the assembly of the eighth piece segment (K segment) is completed, and if the assembly of the eighth piece segment is not completed, the operation returns to step 101.

Next, the reason why the placement position of the assembly segment S is determined as in steps 201 to 203 will be described.
At the time of transporting the first piece segment (A3 segment), as shown in FIG. 1, the segment is naturally not assembled at the P3 position under the tunnel in the segment ring position assembled adjacent to the existing segment ring. It is placed at the P1 position on the lower segment S * of the existing frontmost segment ring.

During transport of the second piece segment (A2 segment), the erector 1 is in the middle of performing segment assembly work by holding the first piece segment in the holding frame 33, and the segment is still assembled at the P3 position. Since it is not covered, P1 as well as the segment of the first piece
Place in position.

When the third piece segment (A4 segment) is conveyed, the first piece segment is assembled at the P3 position, but the erector 1 holds the second piece segment to perform the segment assembly work. When the third piece segment conveyed is placed on the first piece segment, as shown in FIG.
In this case as well, it is placed at the P1 position because it hits against and interferes with the segment assembling work of the second piece. During transport of the fourth piece segment (A1 segment), the erector 1 grips the third piece segment to perform segment assembly work. In this case as well, the erector 1 is placed at the P1 position so as not to hit the erector 1. To do.

At the time of transporting the fifth piece segment (A5 segment), the erector 1 holds the fourth piece segment to perform the segment assembly work. The fifth piece segment transported at this time is moved to the P2 position. Even if it is tried to place it, it does not hit the erector 1 as shown in FIG. 8, so in this case it is placed at the P2 position. Even when the sixth and subsequent segments (B1 segment, B2 segment, K segment) are transported, they are placed at the P2 position in the same manner as above.

According to the segment assembly method of the present embodiment as described above, the first to fourth piece segments (A
3 segment, A2 segment, A4 segment, A1
(Segment) transfer work, these assembled segments are P on the lower segment S * of the existing segment ring.
Since it is placed in one position, even if the next 2-4 piece segment is conveyed during the assembly of the 1st-3rd segment, the conveyed assembly segment does not hit the erector 1 and The assembling work and the carrying work of the next segment can be performed in parallel, so that it is not necessary to carry the next assembling segment after the bolt fastening of the assembling segment is completed. In addition, the fifth and subsequent segments (A5 segment, B1 segment, B2 segment
In the transfer operation of the segment, the K segment), since these assembly segments are placed at the P2 position on the first and second piece segments, the gripping frame 33 of the erector 1 is different from the case where it is placed at the P1 position. In order to grip the segment, the distance moved in the tunnel axis direction may be shortened by one segment ring, and the moving time of the grip frame 33 can be shortened. Therefore, the work efficiency of assembling the segments can be improved and the segment assembling time can be shortened.

Further, in this embodiment, since the assembly segment S is directly transported by using the substantially L-shaped transport device 51 and placed at the P1 position and the P2 position, the segment transport operation is facilitated and the segment The transportation time is shortened.

In the present embodiment, when the fifth and subsequent segments are transported, they are placed at the P2 position on the segments of the first and second pieces of the segment ring that is currently assembled. Whether this is possible in the segments after the eye depends on the diameter of the segment ring and the number of divisions.

Further, in the present embodiment, the pure segment assembling work and the segment carrying work are both manually performed by the operator, but they may be automatically performed by using the segment automatic assembling apparatus. In this case, the segment assembly work can be performed more efficiently and at high speed.

Further, in the present embodiment, the assembly segment S is directly transported from the rear of the tunnel and placed at the P1 position or the P2 position by using the substantially L-shaped transport device 51. Is not limited to this, and the segment supply device such as a trolley arranged on the lower segment of the existing segment ring by transporting the assembly segment S to the vicinity of the erector 1 by, for example, a hoist or the like. The operator may then move the segment feeder to the P1 or P2 position and bring it. Further, as the erector device, the one in which the cylindrical revolving drum 9 is fixed to the revolving wheel 5 is used, but it is not particularly limited to this, and a gate type in which two arms are attached to the revolving wheel on the left and right, Other types such as a link type in which parallel links are attached to the slewing wheel may be used.

[0040]

According to the present invention, the assembling work of the segment and the carrying work of the next segment are performed in parallel, and
In the segment assembly work, the segment grip of the elector device moves in the tunnel axial direction from the middle, so the segment assembly work efficiency improves.
1 ring segment assembly time is reduced.

[Brief description of drawings]

FIG. 1 is a side view of a segment assembling apparatus used in a segment assembling method according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a diagram showing how an assembly segment is held by a holding frame of the erector shown in FIG.

FIG. 4 is a view showing an assembly pattern of the segment 1 ring used in the embodiment of the present invention and a mounting position of the assembled segment.

FIG. 5 is a flowchart showing an assembly operation of the segment 1 ring according to the embodiment of the present invention.

FIG. 6 is a diagram showing a state during segment transfer of a first piece according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view showing how a second piece segment is assembled in the embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a manner of assembling a fourth piece segment according to the embodiment of the present invention.

[Explanation of symbols]

1 Electa 5 slewing wheels 9 swiveling drum 33 gripping frame 33a gripping part 50 carrier beams 51 Conveyor 53 running body 55 Transport frame 59 gripping frame S Assembly segment

Front page continuation (72) Inventor Hisashi Hashimoto, 650 Kintate-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd., Tsuchiura factory (72) Inventor, Hiroki Polymorph, 650 Jinrachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura factory (56) References JP-A-2-88893 (JP, A) JP-B-3-42399 (JP, B2) (58) Fields surveyed (Int.Cl. ⁷ , DB name) E21D 11/40

Claims (2)

(57) [Claims] 1. A transport device for transporting an assembled segment from a rear side to a front side of a tunnel, and a segment gripper capable of moving at least one segment ring in a tunnel axial direction, and the assembled segment transported by the transport device is the segment. With a shield machine equipped with an erector device that holds a grip portion and positions it at a desired position with respect to an existing segment, in a method of assembling a segment ring that assembles a plurality of assembly segments from the tunnel bottom to the top, Transfer the assembled segment from the rear of the tunnel to the position of the frontmost existing segment ring and place it on the lower segment of the existing segment ring, and then move the segment grip of the elector device to the position of the existing segment ring. The assembly segment A first step of assembling a plurality of segments in the lower portion of the tunnel by gripping, and assembling by positioning this assembly segment at a desired position with respect to the existing segment, and after assembling the plurality of segments in the first step, Transfer the assembled segment from the rear of the tunnel to the position of the segment ring being assembled and place it on the lower segment of the segment ring, and then move the segment grip of the elector device to the position of the segment ring being assembled. Gripping the assembly segment, positioning the assembly segment at a desired position with respect to the existing segment, and assembling the assembly segment to assemble a plurality of segments subsequent to the segment assembled in the first step to complete a segment ring; Has two steps Method of assembling the segments, characterized in that. 2. The method for assembling a segment according to claim 1, wherein the segment suspending portion is a substantially L-shaped segment that extends forward in the tunnel axial direction as the transport device, and in the first and second steps. A method for assembling a segment, characterized in that the assembly segment is directly conveyed and placed on a lower segment of the existing segment ring and a lower segment of the segment ring being assembled by the substantially L-shaped conveying device. .