JPH066880B2 - Tunnel excavator with double erector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention constructs a segment ring in a tunnel excavated by a tunnel excavator in a short time. Tunnel excavator equipped with "double erector").

[Conventional technology]

The construction period for constructing a tunnel with the tunnel excavator is determined by the time for excavation by the cutter disk and the segment assembly time by the erector after excavation. Therefore, in order to shorten the tunnel excavation period, it is effective to relatively reduce the assembly time of the segment which is the tunnel lining.

By the way, in a conventional tunnel excavator, only one erector including a support arm, a suspension beam, and a segment chucking (grasping) device is provided on a slewing wheel that is rotatably configured in a shield frame (for example, See JP-A-61-79000, JP-A-62-50599, JP-A-60-58698 and JP-A-62-50300).

When constructing a segment ring on the tunnel wall, the chucking device grips and receives the segments transported by the trolley and hoist, and operates the swivel wheels and suspension beams in an interlocking manner to individually position the segments on the tunnel wall. Then, they are assembled into a ring shape and assembled into the existing segment ring.

[Problems to be Solved by the Invention]

However, since the conventional tunnel excavator is equipped with only one erector, it is not possible to perform the work of receiving the segments and the assembly work at the same time, or the segment assembly work of the left and right sides of the tunnel at the same time. This inevitably requires a huge amount of time for segment assembly. In particular, in recent years, the number of segment divisions has increased due to the increase in the diameter of the tunnel, and therefore the segment assembly time tends to increase more and more.

On the other hand, in recent years, due to improvements in excavation technology and excavation performance, the time required for excavation of a tunnel excavator is decreasing. For example, automation of the segment assembly work has been promoted to improve the efficiency of the segment assembly work, but this cannot meet the demand for a significant reduction in segment assembly time.

Therefore, in view of the above problems, an object of the present invention is to provide a tunnel excavator equipped with two erectors (double erectors) configured to be simultaneously operable in the same turning range in order to quickly construct a segment ring. To do.

[Means for Solving the Problems]

To achieve the above object, the tunnel excavator according to the present invention,
A guide beam which is held by the shield frame and extends in the axial direction of the shield frame is provided, a drum supported by the guide beam is concentrically provided on the shield frame, and erectors are symmetrically arranged in front of and behind the drum. It is characterized by forming a double erector.

Further, in this configuration, each of the double erectors is provided with a slewing wheel rotatably supported on the drum end along the inner circumference of the shield frame, and on the slewing wheel movably in the radial direction on the outer peripheral surface thereof. It is characterized by comprising an arch-shaped suspension beam and a segment gripping device slidably provided on the suspension beam in the axial direction of the shield frame and having a swing range on the peripheral surface of the drum.

[Action]

In the above structure, each erector forming a double erector symmetrically provided in the front and rear of the drum operates independently for segment assembly. That is, each of the turning wheels is supported by the drum and turns along the inner circumference of the shield frame, and accordingly, each segment gripping device turns and moves on the drum forming the same turning range. Equipped with a double erector, each erector operates independently (turning, expanding, contracting, sliding, aligning, attaching and detaching segments)
You can Therefore, by operating both (front and rear) erectors at the same time, for example, one receives the segment, the other assembles the segment, or one assembles the segment on the right side of the tunnel and the other assembles the segment on the left side at the same time. be able to.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an entire double erector, which is a main part of the present invention, FIG. 2 is a side sectional view of a tunnel excavator equipped with the double erector, and FIG. 3 is a rear view thereof.

1 to 3, in a shield frame 1 of a tunnel excavator, a support ring 2 which also functions as a reinforcement of the shield frame 1 is provided along the inner peripheral wall thereof. A pair of left and right columns 3 and 3 are provided on the inner peripheral wall of the support ring 2, and cantilevered guide beams 4 and 4 whose one ends are fixed to the columns 3 and 3 are arranged substantially in the axial direction of the shield frame. It extends horizontally. Each of the guide beams 4 and 4 has a box-shaped cross section, and guide grooves 4a and 4a are axially formed on the upper and lower surfaces thereof.

A ring-shaped drum 5 supported by the guide beams 4 and 4 is concentrically provided on the shield frame 1. That is, a pair of upper and lower guide arms 5a and 5b having convex portions that engage with the guide grooves 4a and 4a of the guide beams 4 and 4 are attached to both left and right sides of the drum 5. in this way,
By providing the guide arms 5a and 5b so as to sandwich the guide beams 4 and 4 from the upper and lower sides, the rotational reaction force of the turning wheels 7 and 7A, which will be described later, is supported.

Between the lower guide arms 5b and 5b and the guide beams 4 and 4, there are movable jacks 8 and 8 for configuring the drum 5 to be movable along the guide beams 4 and 4 in the shield frame axial direction. It is provided in parallel along the beams 4 and 4.

The drum 5 is provided with two erectors (double erectors) 6A and 6A. In the figure, those for the front erector 6A are indicated by adding a suffix "A" to the reference numeral.

Front erectors 6A symmetrically arranged in front of and behind the drum 5,
The rear erectors 6 are swivel wheels 7A, 7 and support arms, respectively.
11A, 11, hanging beams 14A, 14, segment gripping device 17
It is composed of A, 17 etc.

Hereinafter, for the sake of convenience, the configuration of the rear erector 6 will be described in detail, but the configuration of the front erector 6A is also the same except for special notes.

The slewing wheel 7 provided at the rear end of the drum 5 is rotatably supported by the drum 5 via a bearing 10. The drive motor 9, which is the rotating means, has four
It is deployed in some places. As the drive motor 9, a hydraulic motor is usually adopted, and a hydraulic line is guided and connected from a hydraulic pump unit (not shown). Although not shown, the turning wheel 7 is driven by a rack and pinion system as in the conventional case.

A pair of left and right support arms 11, 11 are provided on the outer circumference of the slewing wheel 7.
Is formed so as to protrude in the radial direction, and an arch-shaped suspension beam 14 is provided on the outer peripheral surface of the slewing wheel 7 between the tops of the two support arms 11, 11. Telescopic rods 12 (Fig. 3) are provided at both ends of the suspension beam 14 so as to project from the support arm.
It is slidably inserted in 11. Ie hanging beams
A telescopic jack 13 is provided between 14 and the support arm 11,
By the expansion and contraction of the expansion and contraction jack 13, the suspension beam 14 is moved in the radial direction while the expansion and contraction rod 12 is guided by the support arm 11.

The suspension beam 14 is provided with a pair of sliding rods 15, 15 overhanging above the outer peripheral surface of the drum 5 and projecting forward of the tunnel. On the other hand, the suspension beam 14 of the front erector 6A
Similarly, a pair of sliding rods 15A, 15A is also provided on A above the drum 5 and behind the tunnel.
6A sliding rods 15A, 15A and rear Electa 6 sliding rod
As shown in FIG. 3, 15 and 15 are facing each other,
The drum 5 is designed to move in the same turning range on the circumferential surface of the drum 5.

A sliding member 18 having a segment gripping device 17 is slidably fitted to the sliding rods 15 and 15. That is, the sliding jack 1 is provided between the suspension beam 14 and the sliding member 18.
6 and 16 are provided, and by the expansion and contraction of the sliding member 18,
That is, the segment gripping device 17 can move in the axial direction of the shield frame along the sliding rod. The segment gripping device 17 is supported by the sliding member 18 via a spherical bearing 18a for facilitating the attitude control of the segment S.

FIG. 4 is a perspective view of an essential part showing the segment gripping device 17. Segment pedestal for holding the segment S
A positioning jack 20, a rotary jack 21, a jack 22 for a key segment, etc., which are operated to control the posture of the segment when the segment is assembled, are provided on the back surface (inner side) of 19. Although not particularly shown, the segment S is gripped by a suction pad provided on the outer surface of the segment receiving base 19. In the figure, 24 (Fig. 2) is a shield jack for advancing the tunnel excavator, 26 and 26A (Fig. 3) are electric wires,
Cables / hose reels for hydraulic hoses and vacuum hoses, two for each erector, left and right.

As is clear from the above description, as the slewing wheels 7 and 7A symmetrically provided on the front and rear of the drum 5 rotate, the respective segment gripping devices 17 and 17A also have the same slewing range.
It moves on the outer peripheral surface of the. Therefore, both erectors 6,
When performing segment assembly work using 6A at the same time, a device is required to prevent interference between the two.

Therefore, as shown in FIGS. 5 and 6, a mounting base 27 for mounting the cable / hose reels 26, 26 (26A, 26A),
27 (27A, 27A) is projectingly provided on the side surfaces of the left and right support arms 11, 11 (11A, 11A) so as to overhang on the circumferential surface of the drum 5, and interference preventing devices are formed on the left and right respectively. That is, the proximity switch 28 is located on the left side of the mounting bases 27 and 27A facing each other through the switch bracket 29 on the rear erector 6 side, and the striker 30A is located on the front erector 6A side via the striker bracket 31A. It is provided.
Similarly, for the mounting bases 27 and 27A on the right side, the front erector 6A
Proximity switch 28A via switch bracket 29A on the side
However, a striker 30 is provided on the rear erector 6 side via a striker bracket 31.

Thereby, for example, when the turning wheel 7 of the rear erector 6 turns left and the proximity switch 28 and the striker 30A come close to each other, the proximity switch 28 and the electromagnetic switching valve (not shown) on the hydraulic line connected to the drive motor 9 are connected. Is energized, the valve port is switched, and the drive motor 9 is stopped. Thus, the turning wheel 7 is prevented from turning further, and the segments S held by the segment holding devices 17 and 17A do not collide with each other.

The striker 30 (30A) is formed to be long in consideration of the inertia of the turning motion of the turning wheel 7 (7A), and is attached to the striker bracket 31 (31A) so that the position can be adjusted quickly, so that the approach state can be changed quickly. It can be detected.
Further, for backup, two proximity switches 28 (28A) are provided on each bracket.

Next, the operation of the double erector will be described.

2 and 3, the front erector 6A is now arranged so that the suspension beam 14A is located below the segment gripping device 1A.
The segment S is gripped with 7A, and from this, the cement S is attached to the existing segment ring S'in the lower part of the tunnel.
It is in the stage of being attached to. On the other hand, the rear erector 6 shows the state in which the segment holding device 17 has received the segment S to be assembled from the segment S that has been transported above the tunnel by the segment transport magazine, with the suspension beam 14 positioned above. There is.

When the rear erector 6 receives the segment S, the rear drive motor 9 turns the slewing wheel 7 to the right to bring the segment to the position on the right side of the tunnel in FIG. in this case,
Since the above-described interference prevention device is provided, both segments S do not collide with each other. Where the telescopic jack
13 and the sliding jack 16 are operated in conjunction to position the segment S, and the positioning jack 20 and the rotary jack 21 are operated to control the attitude of the segment S, and the assembly work to the existing segment S'is performed. To do.

On the other hand, the front erector 6A, after completing the segment assembling work in the lower part of the tunnel in the same manner as described above, rotates the slewing wheel 7A to the right and again moves the segment gripping device 17A upward to receive the segment. Rotate to the position. After receiving the segment S, the segment S is turned to the left and brought to the position on the left side of the tunnel, where the segment assembling work is performed. In this state, the rear erector 6 receives the segment S by turning to the upper position again when the assembly of the right segment is completed. Then, the assembly work of the segment S is performed at the upper position.

As described above, the front and rear erectors 7A, 7 can simultaneously perform segment assembly work. The last key segment to be assembled is assembled using the key segment jack 22.

Thus, a new segment ring was built around the tunnel.

By operating the moving jacks 8 and 8 to move the drum 5 along the guide beams 4 and 4 to the rear of the tunnel, the tail seal 25 (Fig. 2) of the tunnel excavator can be replaced very easily and quickly. Can be done.

〔The invention's effect〕

As described above, according to the present invention, since the erectors are symmetrically provided in the front and rear of the drum to form the double erector, both (front and rear) erectors are simultaneously operated,
It is possible to perform segment assembly work at the same time. That is, for example, one can receive the segment, the other can assemble the segment, or one can assemble the segment on the right side of the tunnel and the other can assemble the segment on the left side at the same time. As a result, the time required for segment assembly is about half that of conventional products, and the construction period required for tunnel excavation can be greatly shortened.

As the construction period has been greatly shortened, the work time in the tunnel has also been greatly shortened, which has significantly improved safety and has the significant effect of significantly reducing the cost required for excavation. is there.

In particular, with the recent increase in the diameter of the tunnel, the effect of the present invention is extremely large as the segment assembly time increases.

[Brief description of drawings]

1 to 6 are drawings for explaining an embodiment of the present invention. FIG. 1 is a perspective view of the entire double erector which is a main part of the present invention, and FIG. 2 is provided with a double erector. FIG. 3 is a side sectional view of the shield excavator, and FIG. 3 is a rear view of the shield excavator. FIG. 4 is a perspective view of an essential part of the segment gripping device, and FIGS. 5 and 6 are explanatory views of a double-erector interference prevention device. 1 ... Shield frame, 2 ... Support ring, 3 ... Struts, 4 ... Guide beam, 5 ... Drum, 6 ... Rear erector, 6A ... Front erector, 7, 7A ... Swivel wheel, 8 ... Moving jack, 9, 9A ... Drive Motor, 10, 10A ... Bearing, 11, 11A ... Support arm, 14, 14A ... Suspension beam, 15, 15A ... Sliding rod, 17, 17A ... Segment gripping device, S ... Segment.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-62-182397 (JP, A) JP-A-2-74800 (JP, A)

Claims (2)

[Claims] 1. A guide beam, which is held by a shield frame and extends in the axial direction of the shield frame, is provided with a drum supported by the guide beam concentrically with the shield frame, and symmetrically before and after the drum. A tunnel excavator having a double erector, wherein the erector is arranged to form a double erector. 2. A slewing wheel in which each of the double erectors is rotatably supported on a drum end along an inner circumference of a shield frame, and an arch provided on the slewing wheel so as to be radially movable on an outer peripheral surface thereof. The double-shaped suspension beam according to claim 1, further comprising: a suspension beam and a segment gripping device slidably provided on the suspension beam in the axial direction of the shield frame and having a swing range on the peripheral surface of the drum. Tunnel excavator with erector.