JPH09303097A - Segment aligning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position a segment by bringing a second guide of an erector head into contact with the inner circumference of an existing segment one ring before at prescribed spaces in a tunnel axial direction to a first guide and another second guide, and balancing contact force. SOLUTION: In the inner circumferential surface of an existing segment 16, for instance, first guide rollers 18 are installed in positions with a prescribed space L2 within the same coss section right-angled to a tunnel axis, and a second guide roller 20 is installed in a position with a prescribed space L1 to one of the first guide rollers 18, on a straight line in the axial direction of a tunnel. The rolling direction alignment of a builtup segment is performed by two first guide rollers 18, and the pitching direction alignment is performed by one of the first guide rollers 18 and the second guide roller 20. The second guide roller 20 is thereby reduced to one, so that cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for aligning segments provided in a shield machine, and more particularly, a method in which a plurality of guides installed on an erector are brought into contact with the inner peripheral surface of an existing segment one ring before the assembly segment. And a segment alignment method for positioning the assembly segment by balancing the contact force.

[0002]

2. Description of the Related Art The first prior art, "JP-A-2-54"
Regarding the assembling method of the new segment described in "100", the process explanatory view is shown in FIG. 5, and the vertical jack 78, the guide roller 73 for imitating the vertical direction and the rolling direction in FIG. 6, and the bolt groove 74, The perspective view of the positioning apparatus 20 comprised from the guide roller 76 put in 75, and the jack 79 which sandwiches them is shown.

In FIG. 5, (f) is a new segment 6
6 is a rough alignment for transporting 6 to the vicinity of the existing segment 68, and then the new segment 66 is moved in the direction of the arrow X as shown in (G) and (H), and the guide roller 73 is moved to the inner diameter surface of the existing segment 68. By pressing using the vertical jack 78, the vertical direction (arrow X direction) and the rolling direction (arrow Y direction) are aligned along the inner diameter surface of the existing segment 68. Next, as shown in (i), the existing segments 67 and 68 and the new segment 6
6 has a plurality of bolt grooves 74, 75 each having a guide roller 76, and a plurality of aligning devices 70 shown in FIG. 6 are inserted and sandwiched by jacks 79 in the arrow Z direction, respectively. It is moved in the W direction to force the surface to follow the alignment. When the alignment is completed as described with reference to FIG. 5, the new segment 66 and the existing segments 67 and 68 are simultaneously bolted by a bolt fastener (not shown).

The second prior art, "Japanese Patent Laid-Open No. 2-169"
A method of assembling the new segment described in "700" will be described with reference to FIGS. A method of aligning the new segment 87 to be assembled with the existing segment 87a that covers the tunnel inner wall excavated by the shield body 81 will be described. When the shield main body 81 is propelled one pitch by the shield jack 82 using the existing segment 87a as a scaffolding, the new segment 87 to be assembled is attached to the bracket 86g projecting from the lower end of the arm 86f of the segment erector 86 to connect the existing segment 87a from this point. Move to the position. Then, the sliding jack 89 moves the new segment 87 in the direction of the existing segment 87a as shown in FIG. 9B, and hits the existing segment 87a. This enables positioning in the X direction with respect to the existing segment 87a, and by applying the new segment 87 to the end surface of the existing segment 87a, the new segment 87 rotates about the Y axis and at the same time positioning in the yawing direction (Mz). You can do it.

Further, when the new segment 87 is lowered by the lifting jack 88 in this state, the guide roller 86i projecting from the rear portion of the arm 86f is inserted into the existing segment 87a.
As shown in FIG. 9C, the inner peripheral surface of the guide roller 86i can be positioned in the Z-axis direction with respect to the existing segment 87a, and each guide roller 86i can be attached to the existing segment 87a.
By contacting the inner surface of a, the new segment 87 is rotated about the X-axis, so that the positioning in the rolling direction (Mx) can be performed at the same time. When the positioning in each direction is completed as described above, the turning jack 94 is used to
As shown in (D), new segment 8 to be assembled
7 is pressed against the existing segment 87a with a constant pressing force to perform positioning in the turning direction (Y axis), and at this time, the guide rollers 86h projecting from both ends of the arm 86f are arranged as shown in FIG. 9 (E). Since it comes into contact with the inner circumference of the already-assembled existing segment 87b and is rotated about the Y axis, the positioning in the pitching direction (My) can be performed at the same time. When the alignment of the new segment 87 is completed as described above, the new segment 87 is fixed by the bolt fastening device 98.
The existing segments 87a and 87b are bolted together.

[0006]

However, in the first prior art, the new segment 66 is replaced with the existing segment 68.
The position of the new segment 66 with respect to the existing segment 68 is forcibly adjusted by imitating the surfaces by a plurality of alignment devices 70 without performing the alignment in the pitching direction only by imitating the inner diameter surface of the new segment 66. There was a problem that the accuracy of alignment was reduced.

Further, in the second prior art, since the first segment (invert segment) at the time of assembling the new segment does not have the adjacent existing segment 87b shown in FIG. 9 (E), the positioning function of the guide roller 86h is impossible. Therefore, the alignment in the pitching direction cannot be performed only by the guide roller 86i.
There was a problem that the position had to be adjusted by another means such as a range finder provided at the location.

[0008]

In order to achieve the above object, in the segment alignment method according to the first aspect of the present invention, the first guide installed on the erector head is installed around the tunnel circumference. 1 at regular intervals
In the segment alignment method for positioning the assembly segment by bringing the inner circumferential surface of the existing segment before the ring into contact and balancing the contact force, the second guide installed on the erector head is replaced by one of the first guides. It is characterized in that the assembly segment is positioned by contacting the inner peripheral surface of the existing segment one ring before with another second guide at a constant interval in the tunnel axis direction to balance the contact force.

According to the first invention, two first guides are provided at a constant interval in the tunnel circumferential direction on the inner circumferential surface of the existing segment one ring before the assembly segment, and the first guide or the other is also provided in the tunnel axial direction. Second guide at a fixed interval
By providing the guide, the first guide matches the ascending / descending direction with the rolling direction, and the second guide matches the pitching direction. As a result, even in an invert segment having no adjacent segment, it is possible to perform alignment in the pitching direction by a guide that comes into contact with the inner peripheral surface of the existing segment, which is one ring before the assembled segment and whose entire circumference has been assembled. Therefore, by the first guide and the second guide,
Ascending and descending the assembly segment with respect to the inner peripheral surface of the existing segment,
Positioning (copying) of yawing, rolling and pitching is possible. Therefore, it becomes possible to speed up the alignment of the assembly segment with respect to the existing segment, to improve the accuracy, and to reduce the cost by reducing the number of sensors and the like.

The segment alignment method according to the second aspect of the invention is characterized in that, in the first aspect, the second guide is provided in line with one of the first guides or another second guide in the tunnel axis direction.

According to the second aspect of the present invention, the assembly segments can be immediately positioned in the pitching direction only by balancing the contact force between the two guides provided substantially straight in the tunnel axis direction and the inner peripheral surface of the existing segment. it can. Therefore, the cost of the controller can be reduced and the processing speed can be reduced. Further, since the guides are provided substantially straight in the tunnel axis direction, they are not affected by the curvature error of the existing segment, so that the positioning in the pitching direction can be performed accurately.

The alignment method according to the third invention is characterized in that, in the second invention, the other second guide is provided substantially in the middle of the first guide installed at regular intervals in the tunnel circumferential direction.

According to the third invention, the other second guide is the first
Since it is provided substantially in the middle of the guide, the rolling alignment of the assembly segment by the first guide and the pitching alignment of the assembly segment by the second guide can be adjusted simultaneously and accurately. Therefore, like the second invention,
The cost of the controller can be reduced, the processing speed can be reduced, and the measurement accuracy can be improved. Further, since the magnitude of the curvature of the inner peripheral surface of the existing segment is also detected, it is possible to perform the fine alignment in consideration of the magnitude of the curvature.

A segment alignment method according to a fourth aspect of the present invention is characterized in that a total of two dual-purpose guides, which double as the first guide and the second guide in the first invention, are provided.

According to the fourth invention, a total of two combined guides, which are used as the first guide and the second guide of the first invention, are arranged at a constant interval in the tunnel axis direction and are also constant in the tunnel circumferential direction. Since the inner peripheral surface of the existing segment one ring before is contacted at a distance, the assembly segment is positioned by balancing the contact force between them. Therefore, when precise precision is not required, according to the present invention, the device is simplified due to the reduction in the number of guides, so that the cost of the product can be reduced.

In the segment alignment method according to the fifth aspect of the present invention, in the first to fifth aspects of the invention, the first guide and the second guide are rollers rotatably installed on the erector, and these rollers and the inner peripheral surface of the existing segment. It is characterized in that the contact force with is detected by the load detecting means.

According to the fifth aspect of the invention, the first guide and the second guide formed of rollers rotate on the inner peripheral surface of the existing segment, so that the measurement error due to friction is reduced, and the first guide and the second guide are formed. 2 Guide wear is also reduced. Therefore, the alignment accuracy of the assembly segment is improved, and the durability of the first guide and the second guide is also improved.
In addition, since the movement of the guide is directly detected, it is possible to perform accurate detection with few errors.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a segment alignment method according to the present invention will be described with reference to FIGS. First, a segment erector device used in the segment alignment method according to the present invention shown in FIGS. 1 and 2 will be described. A parallel four-bar link 4 is attached to a revolving ring 3 rotatably supported by a plurality of guide rollers 2 installed on the inner circumference of a shield body 1 of a shield machine similar to the second conventional technique shown in FIG. Through the lifting jack 5
The up-and-down frame 6 is supported so as to be able to move up and down. Each member from the lifting frame 6 to a holding bracket (not shown) that holds the assembly segment 7 installed at the lowermost end of the lifting frame 6 constitutes an erector head 10.

At the three axes X, Y, Z coordinates shown in the figure, the pitching jack 11 mounted on the erector head 10 is shown.
Drives the assembly segment 7 for pitching (My), the yawing jack 12 drives the assembly segment 7 for yawing (Mz), and the rolling jack 13 drives the assembly segment 7 for rolling (Mx). The sliding jack 14 mounted on the erector head 10 is an assembly segment 7
Is driven in the X direction, the fine turning jack 15 drives the assembly segment 7 in the Y direction, and the lifting jack 5 drives the assembly segment 7 in the Z direction. The assembly segment 7 gripped by the erector head 10 in this manner has three axes X, Y,
It can move in all directions in the Z coordinate.

The first detection frame 17 fixed to the lower end of the erector head 10 comes into contact with the inner peripheral surface of the existing segment 16 at regular intervals in the tunnel circumferential direction within the same cross section perpendicular to the tunnel axis. Two first guide rollers 18 (indicated by diagonal lines in one direction) are rotatably mounted, and two first guide rollers 18 contact the inner peripheral surface of the existing segment 16 at regular intervals along a straight line in the tunnel axis direction. Two second guide rollers 20 (shown by the diagonal lines in two directions) are rotatably mounted. The first guide roller 18 for the first detection frame 17 has a first guide roller 18 as shown in FIG.
The detection frame 17 is rotatably supported by a support shaft 22 that is swingably mounted by a support pin 21, and when the first guide roller 18 hits the inner peripheral surface of the existing segment 16, the signal of the load cell 23 is a lead wire. Since it is output to a controller (not shown) via 24, it is detected that the first guide roller 18 has hit the inner peripheral surface of the existing segment 16. Since the mounting of the second guide roller 20 to the second detection frame 19 is the same, the description thereof will be omitted.
With the above structure, the guide roller 2 has the existing segment 16
The contact with the inner peripheral surface of can be reliably detected with a simple configuration. Although the contact force is detected by the load cell 23 in FIG. 3, the present invention is not limited to this, and may be detected by, for example, hydraulic pressure.

Next, a method of aligning the assembly segment 7 with the existing segment 16 in the tunnel by the segment erector device will be described. The assembly segment 7 gripped by the erector head 10 pivots on the pivot ring 3 to move in the segment assembly direction, and is driven in the X, Y, and Z directions by the sliding jack 14, the fine pivot jack 15, and the lifting jack 5. The front end face of the existing segment 16 and the rear end face of the assembly segment 7 move until they come into contact with each other. In this state, the erector head 10 is moved in the inner peripheral surface direction of the existing segment 16 by the elevating jack 5 until it is detected that the first guide roller 18 hits the inner peripheral surface of the existing segment 16.

Next, when the two first guide rollers 18 provided at regular intervals in the circumferential direction of the tunnel hit the inner peripheral surface of the existing segment 16, the assembled segment is detected from the balance of the detection values of the load cells 23 installed in the erector head 10. 7 in the rolling direction, and two second guide rollers 20 provided at regular intervals in the tunnel axis direction.
From the balance of the detection values of the load cell 23 installed in
The assembly segment 7 can be aligned in the pitching direction. As a result, by using the first and second guide rollers 18 and 20 even in the invert segment having no adjacent segment, the existing segment 16 which is one ring before the assembly segment 7 becomes a perfect circle and is less likely to be deformed. Positional alignment can be performed accurately. Positioning of the assembly segment 7 in the yawing direction can be easily performed by applying the rear end surface of the assembly segment 7 to the front end surface of the existing segment 16 by the sliding jack 14.

Next, each embodiment of the segment alignment method according to the present invention shown in FIG. 4 will be described. FIG.
(A) is a diagram showing a first embodiment of the present invention, in which the first guide roller 1 is located at a position on the inner peripheral surface of the existing segment 16 at a constant interval L2 in the same cross section perpendicular to the tunnel axis.
No. 8 is installed, and the second guide roller 18 is placed at a position with a constant distance L1 on one straight line in the direction of the tunnel axis.
One guide roller 20 is installed, and two first guide rollers 18 are used to roll the assembly segment 7 (Mx).
This is an embodiment of a segment alignment method in which alignment is performed in the direction, and one of the first guide rollers 18 and the second guide roller 20 are used to align the assembly segment 7 in the pitching (My) direction.

According to the first embodiment, only the contact forces of one of the first guide roller 18 and the second guide roller 20 provided on the straight line in the tunnel axis direction with respect to the inner peripheral surface of the existing segment are balanced. Since the assembly segment 7 can be immediately positioned in the pitching (My) direction, the number of the second guide rollers 20 can be reduced to one.

FIG. 4B is a diagram showing a second embodiment of the present invention, in which the inner segment of the existing segment 16 is located at a position spaced by a fixed distance 2.L3 in the same cross section perpendicular to the tunnel axis. The first guide roller 18 is installed, and one second guide roller 20 is installed at a position approximately in the middle of the first guide roller 18 and at a constant distance L1 from the first guide roller 18 on the straight line in the tunnel axis direction. Positioning of the assembly segment 7 in the rolling (Mx) direction is performed by the guide roller 18, and two first guide rollers 18 and two second guide rollers 2 are provided.
It is an embodiment of a segment alignment method for aligning the assembled segment 7 in the pitching (My) direction with 0.

According to the second embodiment, assuming that the curvature of the inner peripheral surface of the existing segment 16 is constant, the position on the inner peripheral surface of the existing segment 16 that is substantially in the middle of the first guide roller 18 is determined. Therefore, this position and the second guide roller 20
Pitching the assembly segment 7 (My
In this case, the second guide roller 20 can be reduced to one because the alignment in the () direction can be performed.

FIG. 4 (C) is a view showing a third embodiment of the present invention, in which the inner segment of the existing segment 16 is located at a position spaced by a constant distance 2.L4 in the same cross section perpendicular to the tunnel axis. One guide roller 18 is installed, and one second guide roller 20 is installed approximately in the middle of the first guide roller 18 in the same cross section as the first guide roller 18, and the second guide roller 20 is installed at a constant distance L1 on the straight line in the tunnel axis direction. The other second guide roller 20 is installed at the position where is placed, the assembly segment 7 is aligned in the rolling (Mx) direction by the two first guide rollers 18, and the two second guide rollers 20 are assembled. It is an embodiment of a segment alignment method for aligning the segment 7 in the pitching (My) direction.

According to the third embodiment, the rolling (Mx) of the assembly segment 7 for balancing the contact force of the first guide roller 18 with the inner peripheral surface of the existing segment 16 is carried out.
The alignment in the direction and the alignment in the pitching (My) direction of the assembly segment 7 that balances the contact force of the second guide roller 20 with the inner peripheral surface of the existing segment 16 are performed independently. Further, since there are a total of three guide rollers of the two first guide rollers 18 and one second guide roller 20 in the same cross section perpendicular to the tunnel axis,
The curvature of the inner peripheral surface of the existing segment 16 can also be measured.

FIG. 4 (E) is a view showing a fourth embodiment of the present invention, in which a constant distance L5 is set in the tunnel circumferential direction and a constant distance L1 is set in the tunnel axis direction on the inner peripheral surface of the existing segment 16. By placing two dual-purpose guide rollers 25, the rolling of the assembly segment 7 (M
It is an embodiment of a segment alignment method for performing alignment in the x) direction and alignment in the pitching (My) direction.

According to the fourth embodiment, assembling is performed by balancing the contact force of the two combined guide rollers 25 installed at a constant interval L5 in the circumferential direction of the tunnel with the inner peripheral surface of the existing segment 16. By aligning the segment 7 in the rolling (Mx) direction and balancing the contact force of the two combined guide rollers 25 installed at a constant interval L1 in the tunnel axis direction with the inner peripheral surface of the existing segment 16, Assembly segment 7
The rolling (Mx) direction alignment is performed. Therefore, although the program of the controller becomes complicated, the measurement accuracy can be improved because the measurement error is reduced by reducing the number of guides.

[Brief description of drawings]

1A and 1B are views showing a segment elector device used in each embodiment of the present invention, in which FIG. 1A is a top view and FIG. 1B is a side view.

FIG. 2 is a view on arrow V in FIG.

FIG. 3 is a detailed view of a guide roller portion used in each embodiment of the present invention.

FIG. 4 is a diagram showing each embodiment of the segment alignment method according to the present invention, in which (A) is the first embodiment and (B) is the second embodiment.
Example, (C) is a third example, (D) is a rear view of (C), and (E) is a diagram showing a fourth example.

FIG. 5 is a partial vertical cross-sectional view of a tunnel machine showing a first conventional technique.

6 is a vertical sectional view taken along the line AA of FIG.

FIG. 7 is a partial vertical cross-sectional view of a tunnel machine showing a second conventional technique.

8 is a cross-sectional view taken along the line AA of FIG.

FIG. 9A is a diagram showing a second prior art segment alignment method, in which the assembly segment is moved in the X, Y, and Z directions, and rolling (Mx) and pitching (M) are performed.
y), a diagram showing a method of aligning segments by yawing (Mz), (B) a diagram showing a method of aligning assembly segments in the yawing (Mz) direction, and (C) showing a method of aligning assembly segments in the rolling (Mx) direction. The figure which shows the alignment method, (D) is a figure which shows the alignment method which presses an assembly segment on an existing segment with a fixed pressing force,
(E) is a diagram showing a method of aligning the assembly segment in the pitching (My) direction.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Shield body, 2 ... Guide roller, 3 ... Revolving ring, 4 ... Parallel four-bar link, 5 ... Lifting jack, 6 ... Lifting frame, 7 ... Assembly segment, 10 ... Elector head, 11 ... Pitching jack, 12 ... Yawing Jack, 13 ... rolling jack, 14 ... sliding jack, 15 ... fine turning jack, 16 ... existing segment, 1
7 ... 1st detection frame, 18 ... 1st guide roller (1st
Guide), 19 ... Second detection frame, 20 ... Second guide roller (second guide), 21 ... Support pin, 22 ... Support shaft, 23 ... Load cell, 24 ... Lead wire, 25 ... Combined guide roller (combined guide) .

Claims (5)

[Claims] 1. An assembly segment is formed by contacting a first guide installed on an erector head with an inner circumferential surface of an existing segment one ring before at a constant interval in a circumferential direction of the tunnel to balance the contact force. In a method of aligning a segment to be positioned, an inner circumference of an existing segment one ring before is provided by spacing a second guide installed on the erector head from one or other second guides of the first guide in a tunnel axial direction. A method for aligning segments, comprising positioning an assembled segment by bringing the surfaces into contact with each other to balance the contact force. 2. The segment alignment method according to claim 1, wherein the second guide is provided substantially in alignment with one of the first guides or another second guide in the tunnel axial direction. Alignment method. 3. The segment alignment method according to claim 2, wherein the other second guide is provided substantially in the middle of the first guides arranged at regular intervals in the tunnel circumferential direction. Alignment method. 4. The segment alignment method according to claim 1, wherein a total of two dual-purpose guides that serve as both the first guide and the second guide are provided. 5. The segment alignment method according to claim 1, wherein the first guide and the second guide are rollers rotatably installed on the erector, and the rollers and the inner peripheral surface of the existing segment. A segment alignment method, characterized in that the contact force of the vehicle is detected by a load detection means.