JPH0288894A - Tunnel excavator with double erector - Google Patents

Abstract

PURPOSE:To shorten the term of work by concentrically installing a drum supported by a guide beam to a shield frame, symmetrically disposing erectors before and behind the drum and forming double erectors. CONSTITUTION:With a rear erector 6, a segment S is received by a segment gripper 17, a turning wheel 7 is turned to the right by a motor 9, and the segment S is carried up to the right side of a tunnel. An expansion jack 13 and a sliding jack 16A are operated and the segment S is positioned, the posture of the segment S is controlled, and the segment S is incorporated into an existing segment S'. The erector 6 is turned up to an upper section again, and the segment S is received and incorporated in the upper section. With a front erector 6A, a lifting beam 14A is positioned at a lower section, and the segment S is gripped by a segment gripper 17A and assembled to the segment S' in the lower section of the tunnel. The gripper 17A is turned upward again, the segment S is received, the turning wheel is turned to the left and the segment S is carried up to the left side of the tunnel, and the segment S is assembled.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is aimed at constructing a segment ring in a short time in a tunnel excavated by a tunnel excavator.
The present invention relates to a tunnel excavator equipped with two erectors (hereinafter referred to as "double erectors") that operate the swing range.

[Conventional technology]

When constructing a tunnel using a tunnel excavator, the construction period is determined by the excavation time using a cutter disk and the segment assembly time using an erector after excavation. Therefore, in order to shorten the construction period for tunnel excavation, it is effective to relatively shorten the assembly time of the segments that are tunnel linings.

By the way, in a conventional tunnel excavator, only one erector 2 consisting of a support arm, a hanging beam, a segment chucking (gripping) device, etc. is provided on a swing ring configured to be freely rotatable within a shield frame (for example, ,
JP-A-61-79000, JP-A-62-5059
Publication No. 9, Publication of Utility Model Application No. 1983-58698, Publication of Utility Model Application No. 1983
(Refer to Publication No.-50300).

When constructing a segment ring on a tunnel peripheral wall, a chunking device grasps and receives the segments transported by a trolley or hoist, and then moves them one by one to a predetermined position on the tunnel peripheral wall by interlocking operations such as turning wheels and hanging beams. They are then transported, assembled into a ring, and then incorporated into the existing segment ring.

[Problem to be solved by the invention]

However, since a conventional tunnel excavator is equipped with only one erector, it is not possible to perform segment receiving and assembly operations at the same time, or to assemble segments on the left and right sides of the tunnel at the same time. This inevitably requires an enormous amount of time to assemble the segments. In particular, in recent years, the number of divided segments has increased due to the increase in the diameter of tunnels, so the time required to assemble segments has tended to increase.

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

Therefore, in view of this problem, the present invention provides a ton ram excavator equipped with two erectors (double erector) configured to be able to operate simultaneously in the same turning range in order to quickly construct a segment ring. The purpose is to

[Means to solve the problem]

In order to achieve the above object, the tunnel excavation machine according to the present invention has the following features:
A guide beam is provided which is held by a shield frame and extends in the axial direction of this silt frame, and a drum supported by this guide beam is provided concentrically with the shield frame, and electric units are arranged symmetrically in front and behind this drum. It is characterized by forming a double erector.

Further, in this configuration, each of the double erectors includes a turning ring supported at the end of the tram so as to be rotatable along the inner periphery of the shield frame, and a turning ring provided on the turning ring so as to be movable in the radial direction on the outer circumferential surface of the turning ring. The present invention is characterized in that it is comprised of an arch-shaped suspension beam, and a segment gripping device that is provided on the suspension beam so as to be slidable in the axial direction of the shield frame and has a rotation range on the circumferential surface of the drum.

[Effect]

In the above configuration, each erector forming the double erector provided symmetrically at the front and rear of the drum operates independently for segment assembly. That is, each swing ring is supported by a drum and rotates along the inner periphery of the shield frame, and accordingly, each segment gripping device swings on the drum forming the same swing range. Equipped with double erectors, each erector can operate independently (swivel, extend/contract, slide, position alignment, attach/detach segments)
Can be done. Therefore, both (front and rear) erectors can be operated at the same time, for example, one to receive the segment and the other to assemble the segment, or one to assemble the segment on the right side of the tunnel and the other to assemble the segment on the left side. can perform tasks at the same time.

〔Example〕

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

FIG. 1 is a perspective view showing the 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 of the same.

1 to 3, a support ring 2 which also serves to reinforce the shield frame 1 is provided inside a shield frame 1 of a tunnel excavating machine along its inner peripheral wall. A pair of left and right columns 3.3 are provided on the inner peripheral wall of the support ring 2, and a cantilevered guide beam 4.4, one end of which is fixed to each column 3.3, extends approximately in the axial direction of the shield frame. It extends horizontally. Each of the guide beams 4.4 has a box-like cross section, and has guide grooves 48.4a carved in the axial direction on its upper and lower surfaces.

A ring-shaped drum 5 supported by the guide beam 4.4 is provided concentrically on the shield frame l. That is, a pair of upper and lower guide arms 5a and 5b having a convex portion that engages with the guide groove 48.4a of the guide beam 4.4 is attached to the left and right sides of the drum 5. in this way,
By providing guide arms 5a and 5b to sandwich the guide beam 4.4 from both upper and lower sides, it is possible to support the rotational reaction force of a turning ring 7.7A, which will be described later.

Between the lower guide arms 5b, 5b and the guide beam 4.4, a movable jack 8.8 for configuring the drum 5 to be movable in the axial direction of the shield frame along the guide beam 4.4 is provided as a guide. It is arranged parallel to the beam 4.4.

The drum 5 has two erectors (double erector).
) 6A, 6 are installed. In the figure, front erector-6
Those corresponding to A are indicated by adding the suffix "A" to the reference numeral.

Front erector 6A symmetrically provided before and after the drum 5
, the rear erector 6 is composed of turning wheels 7A, 7, support arms 11A, 11, suspension beams 14A, 14, segment gripping devices 17A, 17, etc., respectively.

Hereinafter, for convenience, the configuration of the rear erector 6 will be described in detail, but the configuration of the front erector 6 is also the same except as specified.

A turning ring 7 provided at the rear end of the drum 5 is rotatably supported by the drum 5 via a bearing 10.

The drive motors 9 serving as the rotation means are provided at four locations for each erector. This drive motor 9 is usually a hydraulic motor, and is connected to a hydraulic line from a hydraulic pump unit (not shown). Although not shown in the drawings, the swing wheel 7 is driven by a rack and pinion system as in the past.

A pair of left and right support arms 11.
11 is formed to protrude in the radial direction, and an arch-shaped suspension beam 14 is installed on the outer peripheral surface of the swing ring 7 between the tops of both support arms 11.11. Telescopic rods 12 (FIG. 3) are protruded from both ends of the suspension beam 14, and are slidably fitted into the support arm 11. That is, a telescoping jack 13 is provided between the suspension beam 14 and the support arm 11, and as the telescoping jack 13 expands and contracts, the suspension beam 14 is moved in the radial direction while the telescoping rod 12 is guided by the support arm 11. It has become.

A pair of sliding rods 15, 15 are provided on the suspension beam 14, overhanging above the outer circumferential surface of the drum 5 and protruding toward the front of the tunnel. On the other hand, a pair of sliding rods 15A, 1 are also attached to the suspension beam 14A to the front erector 6.
5A protrudes above the drum 5 and at the rear of the tunnel, so the sliding rods 15A, 15A of the front erector 6A
As shown in FIG. 3, the sliding rods 15 and 15 of the rear erector 6 are opposed to each other and rotate in the same rotation range on the circumferential surface of the drum 5.

The sliding rod 15.15 has a segment gripping device 1
A sliding member 18 provided with 7 is slidably fitted.

That is, a sliding jack 16.16 is provided between the suspension beam 14 and the sliding member 18, and the expansion and contraction of the sliding jack 16. It is possible to move in the direction. Further, the segment gripping device 17 is supported by a sliding member 18 via a spherical bearing 18a in order to facilitate posture control of the segment S.

FIG. 4 is a perspective view of essential parts of this segment gripping device 17. On the back (inside) side of the segment holder 19 for gripping the segment S, there are a positioning jack 20, a rotary jack 21, and a key segment jack 22, which are operated to control the posture of the segment when assembling the segment. etc. are arranged. Although not particularly shown, the segment S is held by the segment holder 1.
This is done by suction using a suction pad provided on the outer surface of 9. In addition, in the figure, 24 (Figure 2) is a shield jack for making the tunnel excavator dig, and 26.26A (
Figure 3) is a cable/hose reel for electric wires, hydraulic hoses, and vacuum hoses, two on each side for each erector.

As is clear from the above description, with the rotation of the turning wheels 7.7A provided symmetrically at the front and rear of the drum 5, the respective segment gripping devices 17.17A also move on the outer peripheral surface of the drum 5 within the same turning range. Rotate and move. Therefore, when performing segment assembly work using both erectors 6 and 6Δ at the same time, a device is required to prevent interference between the two.

Therefore, as shown in FIGS. 5 and 6, the cable/hose reels 26.26 (26A, 26A) are attached to the mounting bases 27.27 (27A, 27A) on the left and right support arms 11.11 ( IIA, IIA) are protruded from the sides of the drum 5 so as to overhang the circumferential surface of the drum 5, and interference prevention devices are formed on the left and right sides, respectively. That is, the proximity switch 28 is connected to the rear erector 6 side via the switch bracket 29, and the front erector 6A side is connected to the proximity switch 28 via the striker bracket 31A, at opposite positions of the mounting base 27 and 27A end on the left side. A striker 30A is provided. Similarly, for the mounting base 27.27A on the right side, a proximity switch 28A is connected to the front erector 6A side via a switch bracket 29A, and a striker 30 is connected to the rear erector 6 side via a striker bracket 31. It is provided.

As a result, for example, when the swing wheel 7 of the rear erector 6 turns to the left and the proximity switch 28 and the striker 3OA approach each other, the electromagnetic switching valve (as shown) on the hydraulic line connected to the proximity switch 28 and the drive motor 9 ) becomes energized, the valve port is switched, and the drive motor 9 is stopped. In this way, further turning of the turning wheel 7 is prevented, and the segments S held by the segment gripping devices 17, 17A are prevented from colliding with each other.

In addition, in consideration of the inertia of the turning movement of the turning wheel 7 (7A), the striker 30 (30A) is formed long and is attached to the striker frame 31 (31A) so that its circumference can be adjusted vertically. , the proximity state can be detected early. Furthermore, in order to prevent a blowout, two proximity switches 28 (28A) are provided on each bracket.

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

In the second and third figures, the front erector-6A is now
The hanging beam 14A is positioned below, the segment S is gripped by the segment gripping device 17A, and the segment S is now being assembled into the existing segment ring S' in the lower part of the tunnel. on the other hand,
The rear erector 6 is shown in a state in which the hanging beam 14 is positioned upward and the segment l-5 to be assembled, which has been transported to the lower part of the tunnel by the segment transport magazine, is received and gripped by the segment gripping device 17. ing.

After the rear erector 6 receives the segment hs, the drive motor 9 causes the swing wheel 7 to turn to the right to bring the segment to a position on the right side of the tunnel in FIG. In this case, since the above-mentioned interference prevention device is provided, both segments 1-5 will not collide with each other. Here, the telescopic jack 13, the sliding jack 16, etc. are operated in conjunction to position the segment L-5, and the positioning jack 20 and rotary jack 21 are operated to control the attitude of the segment S. Assembling to s' requires work.

On the other hand, for the front erector 6, after completing the segment assembly at the bottom of the tunnel in the same manner as above,
The turning wheel 7A is turned to the right, and the segment gripping device 17A is turned to the upper position in order to receive the segment again. Then, after picking up segment s, turn it to the left and bring it to the left side of the tunnel.
Therefore, segment assembly is performed. In this state, when the right side segment assembly is completed, the rear erector 6 is rotated again to the upper position to receive the segment S. Then, the assembly of segment 1-5 is performed in the upper position.

As mentioned above, the front and rear erectors 7A17 can perform segment assembly work at the same time. Note that the key segment to be assembled last is assembled using the key segment jack 22.

In this way, a new segment ring is constructed on the tunnel circumference.

Furthermore, by operating the moving jack 8.8 and moving the drum 5 toward the rear of the tunnel along the guide beam 4.4, the tail seal 25 (Fig. 2) of the tunnel excavator can be replaced extremely easily and quickly. can be done.

〔Effect of the invention〕

As explained above, according to the present invention, the erectors are provided symmetrically before and after the drum to form a double erector, so both erectors (front and rear) can be operated at the same time.
It becomes possible to perform segment assembly work at the same time. That is, for example, one can receive segments and the other can assemble segments, or one can simultaneously assemble segments on the right side of the tunnel and the other assemble segments on the left side of the tunnel. As a result, the time required to assemble the segments is approximately half that of the conventional method - the construction period required for tunnel excavation can be significantly shortened.As the construction period is significantly shortened, the time required to work inside the tunnel is also significantly reduced. This has the remarkable effect of dramatically improving safety and significantly reducing the cost of excavation.

Particularly, as the segment assembly time increases with the recent increase in tunnel diameter, the effects of the present invention are tremendous.

[Brief explanation of the drawing]

Figures 1 to 6 are drawings for explaining the present invention in detail. Figure 1 is a perspective view of the entire double erector, which is the main part of the present invention, and Figure 2 is a perspective view of the double erector. A side sectional view of the equipped shield excavator, and FIG. 3 shows a rear view of the same. FIG. 4 is a perspective view of the main part of the segment gripping device, and FIGS. 5 and 6 are explanatory diagrams of the interference prevention device of the double erector. ■...Shield frame, 3... Support column, 5... Drum, 6A... Front electric motor 8... Moving jack, 2... Support ring, 4... Guide beam, 6... Rear erector 7, 7A... Swivel wheel, 9.9A... Drive motor, 10, IOA... Bearing, 11.11A... Support arm, 14.14A... Hanging beam, 15.15
A...Sliding rod, 17.17A...Segment gripping device, S...Segment.

Claims (2)

[Claims] (1) A guide beam is provided that is held by the shield frame and extends in the axial direction of the shield frame, and a drum supported by the guide beam is provided concentrically with the shield frame, and erectors are installed symmetrically in front and behind the drum. A tunnel excavator having a double erector characterized by being arranged to form a double erector. (2) Each double erector has a slewing ring supported at the end of the drum so as to be rotatable along the inner periphery of the shield frame, and an arch-shaped swiveling ring provided on the swivel ring so as to be movable in the radial direction on the outer circumferential surface of the swivel ring. 2. The double erector according to claim 1, comprising a hanging beam and a segment gripping device that is provided on the hanging beam so as to be slidable in the axial direction of the shield frame and has a rotation range on the circumferential surface of the drum. Tunnel boring machine with.