JPS62153500A - Shielding excavator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shield excavator, and more particularly to a shield excavator equipped with an erector device that can assemble segments even during tunnel excavation.

[Prior art and its problems]

Conventional shield excavators are equipped with an erector device integrated into the shield body at the rear, and are structured so that during excavation, segment assembly is stopped and the erector device moves forward together with the shield body. As a result, when the shield body finishes digging one segment ring of the tunnel wall and stops, the erector device in the standby state starts assembling the segments. In this way, since excavation by the shield body and assembly of segments by the electric drilling device are performed alternately, it is impossible for the shield excavator to excavate continuously, making it impossible to fully utilize its excavation ability. There is. On the other hand, even when assembled using the erecta device,
This will result in a lack of smoothness.

In order to solve these problems, the shield body is separated into a front shell and a rear shell, and both sides are arranged telescopically. There is one in which the segments are assembled using an erector device. However, once the erector device has finished assembling the segments, it needs time to pull them together with the rear torso towards the front torso in preparation for the next process of assembly, and during this pulling, the shield body must stop at all times, resulting in continuous excavation. This is impossible, and there are limits to how quickly tunnel construction can be done.

[Purpose of the invention]

The present invention has been made in order to solve the above-mentioned problems, and its purpose is to allow the shield body to tunnel continuously, while also allowing the erector device to assemble segments without interfering with the tunnel excavation of the shield body. Our goal is to provide a shield excavator that enables rapid tunnel construction.

[Structure of the invention]

The features of the shield tunneling machine of the present invention will be explained with reference to FIG. Multiple shield jacks 15 are connected to the shield main body 2
on a deck 20 that is disposed in a stepped manner in the direction of the machine axis 16 and is fixed to the shield body 2 and extends rearward.
An erector device 18 that does not follow the advancement of the shield body 2 is displaceably provided. An erector fixing device 19 that moves together with the erector device 18 and presses the existing segment ring 17Δ from inside to fix the movement of the erector device 18 is installed, so that the segments 23 can be assembled even while the shield body 2 is digging. , making continuous excavation possible.

〔Example〕

Hereinafter, the present invention will be explained in detail based on examples thereof.

Shield main body 2 in shield excavator 1 shown in FIG.
A hydraulic motor 4 provided in the driver's cab 3 is located in the front position of the
A cutter disk 7 rotated via a gear 5 and a ring gear 6 is supported on a slewing bearing 8, and a seal 11 is provided between the bulkhead IO to seal the cutter chamber 9 and the operator's cab 3. Furthermore, a heald conveyor 12 for earth removal and a plurality of muddy water discharge pipes 13 are provided to pass through the bulkhead 10 and face the cutter chamber 9, and seals (not shown) are interposed in the penetrating portions of the cutter chamber 9. It is sealed tightly.

At the center position of the shield body 2, there is a spreader 14 at the tip.
A plurality of shield jacks 15 with attached
The base portion is fixed to the ring girder of the shield body 2. In this example, as shown in FIG. 2, there are a total of 24 shield jacks 15, and as shown by the two-dot chain line M in FIG. They are arranged at different locations. This arrangement is done in the assembly order shown in Figure 3.
According to (2), consideration is given to constructing the segment ring 17Δ that forms the tunnel wall 17 by incorporating the segments 23 from the bottom to the top of the shield main body 2. In addition, if the staged arrangement is not used, ■ a shield jack with a long stroke will be required in the later assembled part of the segment ring, and the final part will be required to be 52 times as long. become. Therefore, the stepwise arrangement described above has the advantage that the shield jack 15 with a uniform short stroke can be used. Incidentally, all the shield jacks 15 are assembled into groups A to ■ as shown in FIG. 4, which are time scheduled in accordance with the assembly order I to ■ shown in FIG. 3.
]. And the existing segment ring 1
Front end surface 17a of 7A and segment ring 17B under construction
The excavation reaction force is obtained from the front end surface 17b of the segment 23.
It is sequentially activated to generate a light pressing force to the extent of contact in order to hold it, or to enter a retracted state.

From the center position of the shield body 2 equipped with such a shield jack 15 to the rear position, the shield body 2
A deck 20 that can be moved together with the vehicle is installed. This deck 20 is movably provided with an erector device 18 and a gripper-type erector fixing device 19 that moves integrally therewith, so that it can be moved without following the advancement of the shield body 2. . The deck 20 has a front end 20a fixed to the left and right columns 22 (see FIG. 2) integrated with the ring girder 21 in the shield main body 2, and a rear end fixed to the rear of the erector fixing device 19. As will be described later, the erector fixing device 19 is placed on the top rail 20A (see FIG. 5).
is mounted via a sliding part (not shown). Note that the deck 20 itself has been conventionally employed and serves as a foothold for the operator when fastening the segments 23 at a position above the illustrated segment ring 17B, but in the present invention, As mentioned above, it extends far to the rear. It passes through a central space 24 where the erector device 18 and the erector fixing device 19 are located, and a telescopic support wheel 25 is attached to the rear end so that the load on the deck 20 can be auxiliary supported. There is. On the other hand, a cylinder 26 is fixed to the front position of the upper surface of the deck 20, a chain 27 is attached to its piston rod 26A, and the chain 27 is stretched around sprockets 28A and 28B that are supported on both side surfaces 20b of the deck 20. ing. The chain 27 is connected to the erector fixing device 19 by a metal fitting (not shown), so that the erector device 18 is moved on the deck 20 only by the expansion and contraction operation of the cylinder 2G. As a result, even if the shield body 2 moves forward during the assembly of the segments 23, if the cylinder 26 is left unrestrained, the erector device 18 and the erector fixing device 19 will remain in their original positions without following the forward movement. This allows the shield body 2 and the deck 20 to move forward without interfering with segment assembly. In addition, since the erector fixing device 19 is mounted on the rail 20A of the deck 20 via a sliding part, the erector device assembly 8 integrated therewith can be moved by the contraction operation of the cylinder 26 when the segment assembly is completed. It can be easily moved in the direction of arrow 29.

The erector fixing device 19 is attached to the tunnel wall 17 above and below.
A gripper part 19A (see FIG. 5) formed in an arc shape that can follow the inner surface of the
It consists of four connecting struts 32 that connect the left, right, front and rear ends of A, and each of the connecting struts 32 has four telescopic cylinders 30, 31 built therein. Erecta fixing device 1
9 shows that when the erector device 18 assembles the segment 23, the cylinders 30 and 31 are lengthened by one length and the tunnel wall 17 is
It has a function of pressing the inner surface of the erector unit W, 18 to prevent movement of the erector unit W, 18 in the direction of the machine axis 16, and fixing it in a predetermined position.

The erector device 18 includes a segment lifting section 33 and a drum 3.
4, and the piston rod 35 is attached to the hanging portion 33A.
A telescopic jack 35 to which one end of a is fixed is attached. Chucking 3 on the cylinder part 35A
6 is attached and the chucking 36 is moved in the direction of the arrow 29 or the opposite direction, the lifted segment 23 can be moved in the direction of the machine axis 16. Furthermore, a cylinder 38 is provided, which expands and contracts the segments 23 in a radial direction at a position rotated by the drum 34, so that the assembly of the segments is carried out mechanically.

A hydraulic motor 39 is provided below the erector fixing device 19, and a drum 34 is rotated via a ring gear 41 and a slewing bearing 42 that mesh with a gear 40 attached to the hydraulic motor 39. The device 18 can be pivoted into an assembled position.

In addition, there is a retractable type roller conveyor 43 at the bottom of the tunnel.
is arranged to penetrate a part of the lower gripper part 19A,
The segments 23 can be brought into the assembly position from the rear of the tunnel.

In the shield excavator 1 configured as described above, even when the shield main body 2 is excavating toward the face 45, the erector device 18 continues assembling the segments 23 without interrupting the excavation. And tunnel wall 1
7 can be constructed.

FIG. 1 shows that the shield body 2 has a face 4 in order to construct a segment ring 17B in front of the segment ring 17A.
5, and at the same time the erecta equipment VLT18 is constructing the segment ring 17B. More specifically, when the erector device 18 has finished constructing the segment ring 17A, the cylinder 30.31 is retracted and the glisoping action of the segment fixing device 19 is released. When hydraulic oil is introduced into the cylinder 26 from a hydraulic system (not shown), the chain 27 attached to the piston rod 26A is pulled in the direction of arrow 29, and the erector fixing device 19 moves forward on the rail 2°Δ to move the erector device 18 is moved in the direction of arrow 29. cylinder 30
．． 31 is extended, and the gripper part 19A is attached to the tunnel wall 17.
When the inner surface of the erector is pressed again, movement of the erector fixing device 19 and the erector device 18 is prevented, and the erector device 18 is fixed at that position.

During that time, the shield main body 2 continues to dig into the deck 20.
However, since the cylinder 26 is in the unrestrained state, the erector fixing device 19 remains in its original position.

The hydraulic motor 4 in the driver's cab 3 is rotated to drive the cutter disc 7.
rotates, an appropriate number of shield jacks 15 are extended to obtain digging reaction force, the front end faces 17a, 17b of segment rings 17A, 17B are pressed through the spreader 14, and the shield body 2 and deck 20 move forward. do. Further, the erector device 18 is fixed by the segment fixing device 19, and only the cylinder portion 26B of the cylinder 26 moves in the direction of the arrow 29, so that the forward movement of the deck 20 is not inhibited.

The segments 23 are assembled in the order I to ■ shown in FIG.
Finally, the topmost key segment is installed. In the assembly order I, the three shield jacks 15 belonging to group A shown in FIG. The other shield jacks 15 work to support their operation.

This will be explained in detail below. The three shield jacks 15 belonging to group Δ pressing the segment 23 in assembly order I shown in FIGS. 3 and 4 are reduced. The amount of reduction is slightly larger than the width of the segment 23 in the direction of the machine axis 16, which is 11 shown in FIG. 4, and the segment 23 is assembled so as to be parallel to the segment ring 17A. Subsequently, the shield jack 15 is extended and pressed to the extent that it abuts the front end surface 17b of the newly assembled segment ring 17B. This is to ensure that when the segments 23 in the assembly order H are assembled adjacently, bolt fastening of both segments 23 will not be hindered. This is not only for the purpose of absorbing the stroke time for obtaining the digging reaction force by the shield jack 15 belonging to group A when assembling the segments 23 in the assembly order V. Note that the time T1 required for assembly in assembly order I is such that the shield main body 2 is connected to the segment ring 17B.
It is scheduled to be carried out within 1/8 of the total time it takes to complete one segment ring in front of the tunnel.

Immediately before the assembly in assembly order (2) is completed, the shield jack 15 belonging to group B in assembly order H is reduced in size. In the above-mentioned assembly, the number of shield jacks 15 that are strongly pressed to obtain a digging reaction force on the front end surface 17a is 21, which falls under the groups ■ to ■ shown in the upper column of FIG. 4.
It's a book. After completing the assembly, the operator bolts the segment 23 to the existing segment ring 17A (step 1, hereinafter referred to as 81, etc.).

Next, the segments 23 carried in by the roller conveyor 43 are picked up and assembled by the erector device 18 at the position in the assembly order (■), and just before the completion of the assembly, the shield jack 15 belonging to group C in the assembly order (■) is reduced. . Subsequently, the shield jack 15 of group "■" is lengthened by one width, and the front end surface 1 of the new segment ring 17B is
Press 7b lightly. After the assembly is completed, the operator fastens the segment 23 to the existing segment ring 178 and the segment 23 fastened with the above-mentioned S1.

The number of shield jacks 15 exerting the digging reaction force IJ on the front end surface 17a during assembly is 1, which is I,% of group C-H.
There are 8 pieces. Note that the time required for assembly in the assembly order (3) is T2.

Such operations are repeated, and the assembly order Ill~■
The segments 23 are assembled by the operation of the shield jack 15 which bends to the groups C to (■) and by the erector device 18. At that time, the assembled segments 23 are joined together and the shield jack which strongly presses the front & 1j 4 surfaces 17a and 17b is assembled. Although the number 15 changes as shown in FIG. 4, the construction of the segment ring 17B is completed by assembling the key segment 23 in the final assembly order (2).

During this time, at least 12 shield jacks 15 strongly press the front &1i1i surfaces of the segment rings 17Δ, 17B to obtain digging reaction force, so the shield main body 2 continues digging without stopping.

When the construction force of the segment ring 17B has cooled down, the erector device 18 and the segment fixing device 19 are moved again in the direction of the arrow 29 to prepare for the next step of constructing the segment ring.

If the time TR for moving the erector device 18 and the erector fixing device 19 forward by one segment ring is added to the time required for assembly (Tl to T8) in the assembly order 1 to (3) shown in FIG. The entire time for assembly.

Since the time is taken into account to absorb the time loss as already mentioned, there is no waiting time for the shield body 2 caused by the segment assembly work, and continuous excavation is realized.

〔Effect of the invention〕

As explained in detail above, the present invention includes a movable erector device that does not follow the advancement of the shield body on the deck fixed to the shield body, and moves together with the erector device to move the existing segment ring inside. Since the erector device is equipped with an erector fixing device that fixes the movement of the erector device by pressing from both sides, the erector device can perform segment assembly without interfering with tunnel excavation of the shield body. As a result, the shield tunneling machine is able to tunnel continuously, and can exhibit twice the tunneling performance of conventional tunneling machines. Moreover, the assembly function by the erector device is also effective at all times.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of the shield tunneling machine of the present invention, FIG. 2 is a view taken along line nn in FIG. 1, FIG. 3 is an assembly sequence diagram of segments, and FIG. The Joule diagram, FIG. 5 is a view taken along the line ■-V in FIG. 1. ■-Shield excavator, 2-Shield main body, 15-Shield jack, 16-・Machine shaft, 17A・-Existing segment ring, 18-Erector device, 19-Erector fixing device, 20・-Deck, 23-Segment. Patent applicant Kawasaki Kai Kogyo Co., Ltd. Agent
Patent Attorney Yoshi 4 Masashi Yutoshi (1 idiot) Figure 3〉 Engineering Figure 2 飄.

Claims (1)

[Claims] (1) Multiple shield jacks are arranged in a stair-like manner in the direction of the axis of the shield body, and an erector device that does not follow the advancement of the shield body is displaced on a deck that is fixed to the shield body and extends to the rear. Equipped with an erecta fixing device that moves together with the erector device and presses the existing segment ring from inside to fix the movement of the erector device, allowing the segments to be assembled even while the shield body is digging. A shield excavator characterized by being capable of continuous excavation.