JP2846991B2 - 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 method for assembling segments.

[0002]

2. Description of the Related Art A conventional shield excavator will be described with reference to FIGS. 6 and 7. FIG. 6 shows a side view of a shield excavator and a segment positioning device, and FIG. 7 shows a front view of the segment positioning device. . In FIGS. 6 and 7, S is a segment, 50 is a cut-off face of a shield excavator, 51 is a shield excavator body, 52 is a rear trunk of the shield excavator, and the rear trunk 52 is a sediment on the peripheral surface of the excavation circle. It has the role of preventing the collapse.

A thrust bearing 54 is axially disposed between the cutter ace 50 on which the rotating shaft 53 and the shield excavator body 51, and a thrust bearing 54 is disposed circumferentially between the cutter ace 50 and the shield excavator body 51. An outer bearing 55 is a circular bearing disposed in the circumferential direction between the cutter ace 50 and the shield excavator main body 51, and a center bearing 56.

[0004] 57 is a ring gear, 58 is a pinion, 59
Is a motor, and the rotation of the motor 59 is transmitted to the cutter ace 50 via the pinion 58, and the cut ace 50 is rotated.
Rotate around the center bearing 56. Reference numeral 60 denotes a plurality of shield jacks, and each of the shield jacks 60 is disposed on a rear inner surface of the shield excavator main body 51 along a circumferential direction, and each of the shield jacks 60 operates in the extension direction. Then, the shield excavator body 51 is moved forward while being pressed against the front side of the existing segment S.

[0005] Reference numeral 63 denotes a plurality of rollers disposed on the inner peripheral surface of the shield excavator main body 51. Each of the rollers 63 rotatably supports a ring gear 64. 61 is a motor, 62 is a pinion, and the rotation of the motor 61 is a pinion 6
2 and transmitted to the ring gear 64 via the ring gear 6.
4 turns. The ring gear 64 includes a coupling member 67.
The gate-shaped member 66 is mounted via, the lower center of the alumni shaped member 66, the holding member 68 and has the attached gripping device 69, these, the gripping segment S ₀ are pivotally gripped.

A screw conveyor 63a for transporting excavated earth and sand, 63a is a screw conveyor 63
The drive motor 65a is the screw conveyor 63a.
Is a belt conveyor connected to the downstream end in the conveyance direction. In the conventional shield excavator shown in FIGS. 6 and 7,
A plurality of shield jacks 60 arranged in the circumferential direction on the rear inner surface of the shield excavator body 51 are operated in the extension direction, while pressing against the front side of the existing segment S,
While moving the shield excavator body 51 forward, the cutter ace 50 is rotated to excavate earth and sand in front of the shield excavator body 51 and move forward.

Next, any one of the shield jacks 60
One shrinkage operated in a direction, the shield changer to form a cavity between the luck 60 and the existing segment S, here to position the gripping segment S _0, existing bolt segment S
A gripping segment is inserted into the bolt hole formed in the S _0, the same bolts tightened by nuts, these segments S, couples S _0. 71 is a bolt between pieces, and 72 is a bolt between rings.

[0008]

In the conventional shield excavator shown in FIGS. 6 and 7, a space is formed between the shield jack 60 and the existing segment S, and the gripping segment S ₀ is positioned there. Then, bolt the existing segment S
Gripping segment inserted into S ₀ and a bolt hole provided in, by tightening the same bolts by nuts and, these segments S, by combining the S _0, since Yuku sequentially assembled segments, manpower in this segment assembly operation In need. This work area is often narrow and
In a high-temperature, high-humidity environment, heavy-duty work is a representative of so-called 3K (dangerous, hard, dirty) work.

For this reason, research and development for automating segment assembling work are being conducted, and some of them are in the stage of practical use. Segment assembly work can be broadly classified into segment loading, segment gripping,
Positioning, joining segments, but usually
Is a simultaneous operation and is the most difficult operation to automate.
In addition, with a small-diameter shield excavator, the allowable space is small, and segment assembling work is almost impossible.

Further, in the shield excavation method, it is desired that the allowable segment assembling time is short in relation to the excavating time. There was a problem that it had to be long. The present invention has been proposed in view of the above problems, and its object is to grasp and position the segments and to combine the segments (temporary assembly).
Can be performed automatically in a narrow space at the same time,
3K work can be eliminated. Another object of the present invention is to provide a segment assembling method capable of reducing the segment assembling time.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a steel or concrete segment on the inner surface of a circular section tunnel excavated by an excavator such as a shield excavator or a tunnel boring machine. In order to perform tunnel lining by sequentially assembling, the gripping segment gripped by the positioning device is brought close to the existing segment, and a rib protruding in the tunnel longitudinal direction from the inner surface of the front side of the gripping segment on the inner surface of the existing segment, the gripping segment. A rib protruding in the circumferential direction of the tunnel from the inner surface of the lateral side of the
The grip segment is moved in the direction of the existing segment and the adjacent segment, and the fixed taper pin provided on the front surface of the grip segment is inserted into the pin hole provided in the existing segment, and the slide is provided on the lateral side surface of the grip segment. The tapered pin is inserted into a pin hole provided in an adjacent segment, and the grip segment is temporarily assembled to the existing segment and the adjacent segment.

[0012]

According to the method for assembling a segment of the present invention, the grip segment gripped by the positioning device as described above is brought close to the existing segment, and a rib projecting in the longitudinal direction of the tunnel from the inner surface of the front side of the grip segment is attached to the inner surface of the existing segment. The rib protruding in the circumferential direction of the tunnel from the inner side surface of the grip segment is brought into contact with the inner surface of the adjacent segment connected to the existing segment, and then the grip segment is moved in the direction of the existing segment and the adjacent segment, The fixed taper pin provided on the front side of the grip segment is inserted into the pin hole provided on the existing segment, and the sliding taper pin provided on the lateral side of the grip segment is inserted into the pin hole provided on the adjacent segment. Temporarily assemble into segments and adjacent segments. Then, in the same manner, the grasping segment is connected to the existing segment and the adjacent segment, and the new segment is temporarily assembled to the existing segment in a ring shape.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
To explain with reference to one embodiment shown in FIG. 5, 1a to 1 in FIG.
1e is a segment, 1k in FIGS. 1 and 5 is a segment called a so-called key segment interposed between the segment 1c and the segment 1e, 10 in FIG. 2 is an existing segment, and 1a in FIG. The adjacent segment 1b connected to the segment 10 via a bolt / nut indicates a gripping segment to be connected (temporarily assembled) to the existing segment 10 and the adjacent segment 1a. 1 is a frame portion of each of the segments 1a to 1k and 10, 3b is a back plate portion of each of the segments 1a to 1k and 10, and an outer peripheral portion of each of the segments 1a to 1k and 10 is FIG. As shown in FIG. 4, a sealing material 9 is provided.

1, 2, and 4 indicate the direction from the inner surface of the lateral side of the gripping segment 1 b to the circumferential direction of the tunnel (arrow X in FIG. 2).
4), a case 8 is mounted on the inner surface of the lateral side of the gripping segment 1b, and a rib 5 is slidably inserted into a through hole provided on the lateral side of the gripping segment 1b. A sliding taper pin having the rear flange 6 housed in the case 8 and a spring 7 interposed between the flange 6 of the sliding taper pin 5 and the bottom of the case 8 are slid by the spring 7. The dynamic taper pin 5 is urged in the forward direction. 15x
Is a pin hole provided on the lateral side of the adjacent segment 1a.

2 and 3 are the longitudinal direction of the tunnel from the inner surface of the front side of the gripping segment 1b (the direction of arrow Y in FIG. 2).
A plurality of ribs projecting from the front side of the gripping segment 1b, a plurality of fixed taper pins projecting in the longitudinal direction of the tunnel (the direction of arrow Y in FIG. 2), and 15y are pin holes provided in the existing segment 10. is there. 2x of FIG.
A plurality of ribs 2y projecting in the direction of arrow X in FIG. 2 are ribs projecting from the inner surface of the front side of the segment 1k in the longitudinal direction of the tunnel (direction of arrow Y in FIG. 2).

Next, the segment assembling method of the present invention will be specifically described. FIG. 2 shows a state in which the gripping segment 1b is positioned with respect to the existing segment 10 and the adjacent segment 1a. The gripping segment 1b is moved in the X, Y, and Z directions by a gripping device (see 69 in FIG. 7).
The rib 2y of the grip segment 1b is brought into contact with the inner surface of the existing segment 10.

Next, the rib 2x of the grip segment 1b is brought into contact with the inner surface of the adjacent segment 1a. At this time, neither the fixed tapered pin 4 nor the sliding tapered pin 5 has reached the counterpart pin holes 15y and 15x. From this state,
The gripping segment 1b is moved in the direction of the arrow X toward the adjacent segment 1a so that the sealing material 9 of each of the segments 1a and 1b is brought into close contact (compression), and the tip of the sliding taper pin 5 of the gripping segment 1b is moved to the adjacent segment 1a.
, The sliding taper pin 5 is retracted against the spring 7 to compress the spring 7.

Next, the grip segment 1b is moved in the direction of the arrow Y toward the existing segment 10 so that the fixed taper pin 4 of the grip segment 1b is inserted into the pin hole 15y of the existing segment 10, and at the same time, the sliding taper pin 5 of the grip segment 1b is adjacent. The sliding taper pin 5 is advanced by the spring 6 which is aligned with the pin hole 15x of the segment 1a, and the sliding taper pin 5 is
a into the pin hole 15x of FIG.

Then, in the same manner, the grasping segment is connected to the existing segment and the adjacent segment, and a new segment is temporarily assembled to the existing segment in a ring shape. However, segment 1k is adjacent segment 1 on both sides.
Since c and 1e are located, they are connected as shown in FIG.
That is, the rib 2x is brought into contact with the inner surfaces of the adjacent segments 1c and 1e, and then the segment 1k is moved in the arrow Y direction to insert the sliding taper pin 5 of the segment 1k into the pin hole 15x of the adjacent segment 1c and 1e. The rib 2y of 1k is brought into contact with the inner surface of the existing segment 10.

In the above state, the arc-shaped segments are connected in a ring shape, and each time they are temporarily assembled, they are pushed in the direction of arrow Y by a shield jack (see 60 in FIG. 6), so that the shape changes. There is no (breaking).

[0021]

According to the method for assembling a segment of the present invention, the grip segment grasped by the positioning device as described above is brought close to the existing segment, and a rib projecting in the longitudinal direction of the tunnel from the inner surface of the front side of the grasp segment is attached to the existing segment. On the inner surface, ribs projecting in the circumferential direction of the tunnel from the lateral inner surface of the grip segment are brought into contact with the inner surface of the adjacent segment connected to the existing segment, and then the grip segment is moved in the direction of the existing segment and the adjacent segment. Then, the fixed taper pin provided on the front side surface of the grip segment is inserted into the pin hole provided on the existing segment, and the sliding taper pin provided on the lateral side surface of the grip segment is inserted into the pin hole provided on the adjacent segment. Is temporarily assembled into the existing segment and adjacent segments, Simultaneously coupling the positioning and segment a (provisional-assembly) in a narrow space, it can be done automatically, it can be solved 3K work.

Further, since the grip segment is temporarily assembled to the existing segment and the adjacent segment as described above, the bolt holes of the segments can be automatically aligned, and the assembling time of the segments can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of an entire segment temporarily assembled according to an embodiment of a segment assembling method of the present invention.

FIG. 2 is an explanatory diagram showing a tentatively assembled state of grip segments with respect to an existing segment and an adjacent segment.

FIG. 3 is a longitudinal sectional side view taken along line EE in FIG. 2;

FIG. 4 is a longitudinal sectional side view taken along the line FF of FIG. 2;

FIG. 5 is an explanatory diagram showing a temporary assembly state of key segments with respect to an adjacent segment.

FIG. 6 is a vertical sectional side view of a conventional shield excavator.

FIG. 7 is a front view showing a conventional segment holding device.

[Explanation of symbols]

 1a Adjacent segment 1c-1e {1b} Grasping segment 1k Key segment 2x Rib projecting in tunnel circumferential direction 2y Rib projecting in tunnel longitudinal direction 4 Fixed taper pin 5 Sliding taper pin 10 Existing segment 15x Pin hole 15y

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E21D 11/04 E21D 11/40

Claims (1)

(57) [Claims] 1. A steel or concrete segment is sequentially assembled on the inner surface of a circular cross section of a tunnel excavated by an excavator such as a shield excavator or a tunnel boring machine, and is gripped by a positioning device when performing tunnel lining. Move the grip segment closer to the existing segment,
A rib protruding in the longitudinal direction of the tunnel from the inner surface on the front side of the gripping segment is provided on the inner surface of the existing segment, and a rib protruding in the circumferential direction of the tunnel from the inner surface on the lateral side of the gripping segment is provided on the inner surface of the adjacent segment joined to the existing segment. , Respectively, and then moving the gripping segment in the direction of the existing segment and the adjacent segment, so that the fixed taper pin provided on the front surface of the gripping segment is provided in the pin hole provided in the existing segment, and the sliding tape provided on the lateral side surface of the gripping segment. A method of assembling a segment, comprising inserting a dynamic taper pin into a pin hole provided in an adjacent segment, and temporarily assembling the gripping segment into the existing segment and the adjacent segment.