JPH03475Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a shield construction method in which water-stopping and reinforcing segments are assembled on the inner circumferential surface of a tunnel, and the segments are mechanically gripped when completing the lining. The present invention relates to a segment gripping device used for this purpose.

[Prior Art] The erector used for assembling segments in the conventional shield construction method has a shield attached to a swivel ring b rotatably provided in a shield frame a along its inner circumferential wall, as shown in Fig. 6. It has a hanging beam c that is provided to be reciprocally movable in the radial direction of the frame a, and a fork d for gripping segments is attached to the outside of the central part of the hanging beam c. On the other hand, the segments are provided with tap holes at multiple locations for backfilling, which is used to fill the gaps remaining between the segments and the surrounding ground after the lining is completed, by injecting mortar, etc. Since the eyebolts are screwed in by hand using the screws, conventional segment gripping is performed by connecting the appropriate eyebolts on the segment side and the fork d on the suspension beam c side with pins.

[Problems to be solved by the invention] However, in the conventional segment gripping method, the eye bolt is manually screwed into the tap hole for backfilling injection, and the fork d on the side of the suspension beam c and the backfilling of the segment Since the eye bolt screwed into the tap hole for injection is connected manually by a pin, the problem is that it takes a lot of time to grasp and the work is dangerous. Further, mechanically screwing the eye bolt into the tap hole is difficult and has not been adopted.

Therefore, the present invention attempts to make it possible to grasp segments with one touch and without using human power.

[Means for solving the problem] The present invention provides a box cutout in the center of the segment, and a board with a circular hole in the center and a board with a tap hole for backfilling in the center in the thickness direction of the segment. Embedded in the box cutouts at appropriate intervals, the plate having the circular holes is positioned closer to the surface than the plate having the tap holes, and the gripping rod of the erector and the gripping rod are placed on the surface of the plate having the circular holes. It is configured to integrally include a locking alloy having a notch through which the locking portion at the tip of the rod can pass.

[Operation] When gripping a segment, after inserting the tip of the gripping rod of the erector into the notch of the engagement alloy on the segment side, the gripping rod is rotated 90 degrees and raised. As a result, the locking portion at the tip of the gripping rod grips the segment engaged with the engagement alloy, and by pulling up the gripping rod, the segment is lifted. After the segments are assembled at the predetermined locations, backfilling is injected through the tap holes to fill the voids at the back of the tunnel lining.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

1 and 2 show an embodiment of the present invention, in which a box cutout 2 of a required size is provided in the center of a segment 1 and penetrates in the thickness direction, and a tip is inserted in the middle of the box cutout 2. A plate 3 having a circular hole 4 large enough for the tip of the erector's gripping rod 10, which is formed into a T-shape with a locking pin 11, to pass through is positioned, and its peripheral portion is embedded in the segment 1, and the erector is secured. Gripping rod 1
An engaging alloy 5 having a notch 6 in the center corresponding to the cross-sectional shape of the tip of the plate 3 is stacked on the surface side of the plate 3 (inside the segment) and attached with a bolt 7.
The plate 3 and the engagement alloy 5 may be integrated by a method other than bolt fastening. Furthermore, a plate 8 having a tap hole 9 for backfilling in the center and a female thread on the inner periphery is placed in the box cutout 2 part closer to the back side of the segment 1, and its peripheral part is embedded and fixed in the segment 1.

The engagement alloy 5 is provided with a groove 12 on its lower surface, into which the pin 11 of the gripping rod 10 is caught.
2, there is an advantage that the engagement between the engagement alloy 5 and the pin 11 is ensured, but the groove 12 may not necessarily be provided as long as the pin 11 is hooked on the engagement alloy 5 and stabilized.

When gripping the segment 1, the gripping rod 10 of the erector is opposed to the box cutter 2 of the segment 1, and then the gripping rod 10 is moved in the direction of the segment 1, and the tip of the gripping rod 10 is attached to the engagement alloy 5. Then, after rotating the gripping rod 10 by 90 degrees, the gripping rod 10 is retreated in a direction away from the segment 1, and the locking pin 11 at the tip of the gripping rod 10 is engaged with the engagement metal 5. let This completes the grasping of the segment 1, and the erector transports the segment 1 to a predetermined assembly position.

When the assembly of segment 1 is completed and the lining is completed, connect a hose for backfill injection from the inside to the backfill tap hole 9 provided in the plate 8 of the box cutter 2, and pour mortar etc. to the outside of the segment. Inject it to completely fill the void behind the tunnel lining.

In this way, by providing the engagement alloy 5 and the tap hole 9 for backfilling in the box cutout 2 provided in the segment 1, gripping and backfilling can be performed at the same position.

In this embodiment, the erector used is one in which a balancer is attached to a suspension beam and a gripping rod 10 is attached to the balancer, as shown in FIGS. 3 to 5.

The configuration of the erector will be described in detail below.

An annular turning ring 14 is rotatably provided along the inner peripheral wall of the shield frame 13 via a support roller 15, and a gear 16 concentric with the turning ring 14 is attached to the front end of the turning ring 14 to be supported by the shield frame 13. The gear 16 is attached to the output shaft of the motor 17.
Attach the pinion 18 that meshes with the motor 17.
The swing wheel 14 can be rotated by the drive of. At the rear end of the turning ring 14, an arch-shaped suspension beam 1 is provided along the circumferential direction of the shield frame 13.
9 is a pair of guide rods 20 and support arms 21
It is provided so as to be freely movable in the radial direction via. The guide rods 20 are provided at both ends of the suspension beam 19, and are slidably inserted into the guide holes 22 of the support arms 21 attached to the swing ring 14.
A telescopic cylinder 23 for displacing the suspension beam 19 in the radial direction is spanned between the suspension beam 19 and the suspension beam 9 .

A slightly smaller arch-shaped base balancer 24 is provided on the suspension beam 19 so as to be slidable in the axial direction of the shield frame 13 via a pair of guide bars 25 . The guide bars 25 are attached to a base balancer 24 having a groove-shaped cross section, and are slidably inserted into slide holes 26 formed in the hanging beam 19, respectively. A sliding cylinder 27 is provided on the suspension beam 19 for sliding the base balancer 24 in the axial direction.

An end balancer 29 is provided outside the base balancer 24 via a ball joint 28. As shown in FIG. 5, the ball joint 28 includes a shaft 32 having a ball head 31 horizontally attached to the outer surface of the base balancer 24 via a bracket 30, and the ball head 3.
1, and a spherical bearing 33 slidably fitted to the end balancer 2, which is formed in an arc shape along the inner surface of the segment 1.
9 is fixed at the center of the inner surface.

This end balancer 29 is swung in the axial direction (swinging in this direction is called pitching) and circumferential direction (swinging in this direction is called rolling) of the shield frame 13 using the ball joint 28 as a fulcrum. In order to adjust the posture of the shield frame 13, a pair of posture adjustment cylinders 34 are installed between the base balancer 24 and the end balancer 29, each extending a predetermined distance L ₁ from the ball joint 28 to both sides of the shield frame 13 in the circumferential direction.
They are separated and placed a predetermined distance _L2 behind the ball joint in the axial direction of the shield frame. Therefore, when both posture adjustment cylinders 34 are expanded and contracted simultaneously, the end balancer 29 can be pitched, and when they are expanded and contracted alternately, the end balancer 17 can be rolled.

The gripping rod 10 for removably gripping the segment 1 is provided at the center of the outer surface of the end balancer 29. This gripping rod 10 is segment 1
It is inserted into the notch 6 of the engagement alloy 5 and rotated 90 degrees to engage, and then turned back 90 degrees to disengage.In order to automate this engagement and disengagement,
The gripping rod 10 is rotatable by a motor (not shown).

Furthermore, in order to reliably support the segment 1 gripped by the gripping rod 10, the end balancer 29 includes a support jack 3 that protrudes and retracts from the outer surface of the end balancer 29 and presses the inner surface of the segment 1.
A suitable number of 5 are provided.

Furthermore, the end balancer 29 includes segment 1 that has already been assembled (existing segment).
Bolt fastening device 36 for bolting to 1'
A suitable number of are provided.

Next, the case where segment 1 is handled using the above erector will be explained.

First, the end balancer 29 is brought close to the segment 1 placed with the inside facing upward, and the tip of the gripping rod 10 is inserted into the notch 6 of the engagement alloy 5 of the segment 1, and the gripping rod 10 is moved 90 Rotate it once to engage it. Next, segment 1 is lifted up and fixed by pressing the inner surface of segment 1 with the extension action of support jack 35, and then this segment 1 is transported to a predetermined connection position on segment 1' that has already been assembled. . These operations include rotation of the swing wheel 14 and suspension beam 19.
The segment 1 is conveyed to a predetermined connection position by the interlocking operation of the radial movement of the base balancer 24 and the axial movement of the base balancer 24. The posture or position of the segment 1 may be deviated at this predetermined connection position. In this case, the segment's X-axis direction (width direction)
The deviation is due to the base balancer 2 caused by the sliding cylinder 27.
4, the displacement in the Y-axis direction (longitudinal direction) is eliminated by the rotation of the turning ring 14, and the displacement in the Z-axis direction (thickness direction) is eliminated by the rotation of the suspension beam 19 by the telescopic cylinder 23. Eliminated by radial motion. Furthermore, rotational deviations around the X-axis are eliminated by extending one of the posture adjustment cylinders 34 and retracting the other, and rotational deviations around the Y-axis are eliminated by simultaneously operating both posture adjustment cylinders 34. It will be resolved accordingly. Incidentally, the rotational deviation about the Z-axis is eliminated by the segment 1 rotating about the gripping rod 10 when the segment 1 abuts against the end of the existing segment 1'. In this way, the posture of the segment 1 can be freely adjusted, and therefore the assembly work of the segments is facilitated and speeded up.

Once the segment 1 has been positioned in this way, a bolt fastening operation using the bolt fastening device 36 will be performed.

The erector for supporting the gripping rod 10 in the segment gripping device of the present invention includes a base balancer 24 and an end balancer 29 on the hanging beam 19.
An example in which a balancer is attached to freely control the attitude of segment 1 has been described, but if there is little need to control the attitude of the segment, a balancer without balancers 24 and 29 may be used. .

[Effects of the invention] As described above, according to the segment gripping device of the present invention, a box cutout is provided in the segment, and an engagement metal material for engaging the tip of the gripping rod with the box cutout portion, and a backfilling tap are provided. The gripping rod is equipped with a plate with holes, and the gripping rod can be mechanically engaged with the engaging metal, allowing the segment to be gripped easily and quickly without manual effort, improving work safety and efficiency. can be improved.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a segment portion showing an embodiment of the present invention, FIG. 2 is a view taken along the - arrow in FIG. 1, FIG. 3 is a rear view showing an example of an erector to which the present invention is applied, and FIG. The figure is a view taken along the - arrow in FIG. 3, FIG. 5 is an enlarged cross-sectional view of a ball joint connecting a base balancer and an end balancer, and FIG. 6 is a rear view of an erector used in a conventional segment gripping device. , 1 is a segment, 2 is a box cutout, 3 is a plate, 4 is a circular hole, 5 is an engagement alloy, 6 is a notch, 8 is a plate, 9 is a tap hole for backfilling, 10 is a gripping rod, 11 is a locking 12 is a groove, 13 is a shield frame, 14 is a turning ring, 19 is a suspension beam, 24 is a base balancer, 29 is an end balancer, and 34 is an attitude adjustment cylinder.

Claims (1)

[Scope of utility model registration request] A box cutout is provided in the center of the segment that penetrates in the inner and outer directions, and a plate with a circular hole in the center and a plate with a tap hole for backfilling in the center are inserted into the box cutout at appropriate intervals in the thickness direction of the segment. A plate having a circular hole in the center is positioned inside the segment than the plate having the tap hole, and an engaging member having a notch into which the gripping rod of the erector can be inserted and engaged when the gripping rod is rotated. A segment gripping device characterized in that an alloy material is integrally provided on the plate having a circular hole in the center.