JPH0658080A - Shield excavation machine - Google Patents

Abstract

PURPOSE:To enhance the efficiency of excavation by supporting the reactive force to a shield excavating machine during segment assembly by a back reactive force supporting drum coupled with the rear of propelling machine, and propelling the excavating machine simultaneously by a back propelling mechanism mounted on the drum. CONSTITUTION:The reactive force is received to an existing segment 4 by an excavating jack 11 to perform normal excavating forward. Then the reactive force is transferred to a back reactive force supporting drum 2 coupled with a shield machine 1 through a center shaft 10, and the jack 11 is pulled off fully, and a segment 4' is assembled as indicated by the dotted line. Meantime part of the excavation amount is excavated forward by a back reactive force jack 7 and the center shaft 10, wherein the excavating reactive force is supported through the drum 2. After the assembly of the front segment 4' is finished, propelling is conducted while the reactive force is again received to the new segment by the jack 11. Meantime the drum 2 is advanced as preparation for the next run of excavating. Thereby excavating forward can be conducted in parallel with segment assembly, and also the speed of executing the works can greatly be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield machine.

[0002]

2. Description of the Related Art In a conventional shield machine,
(B) The shield jack takes a reaction force to the segment assembled to the rear of the propulsion machine to excavate and propel the natural ground,
(B) After the completion of the excavation for one ring length, each propulsion jack stops while pressing the segment.

(C) Bring the segment to one piece, to the assembly position, pull out only the jack at that position, and assemble it in the space for segment assembly thus secured via an erector or the like. (D) Repeat the above work to assemble all the pieces into the ground, and (e) Move to the next excavation work.

Therefore, from (b) to (d), the excavation by the shield machine is stopped.

[0005]

In the construction using the conventional shield machine, the "digging" and the "segment assembly" are alternately performed, so that the segment assembling work is delayed. Even during segment assembly, the backward reaction force of the shield machine is obtained from the end face of the face of the existing segment by the propulsion jack, so the reassembling work of the jack increases and the segment assembly speed slows down. There is.

The present invention has been proposed in view of the above problems of the prior art, and an object thereof is to provide a shield machine in which the construction speed in segment assembly work is accelerated.

[0007]

In order to achieve the above object, a shield machine according to the present invention has a reaction force supporting drum disposed behind a shield machine equipped with a jack.
The reaction force support drum and the shield machine are connected by a center shaft, and a rear propulsion mechanism is mounted on the rear reaction force support drum.

[0008]

Since the present invention is constructed as described above,
While excavating the existing segment with a reaction force by the shield machine and assembling the segment, while supporting the propulsion reaction force of the shield machine during segment assembly by the rear reaction force support drum connected through the center shaft, The rear propulsion mechanism mounted on the rear reaction force support drum propels the shield propulsion machine during segment assembly.

[0009]

The present invention will be described below with reference to the illustrated embodiments. Reference numeral 1 is a shield machine, and 2 is a rear reaction force support drum composed of a grip drum disposed behind the shield machine 1, and a claw forming a reaction force transmission mechanism protruding from the reaction force support drum 2. The projection 3 is locked to the reaction force box 5 of the existing segment 4.

A pressure support plate 6 is provided so as to project inside the rear reaction force supporting drum 2, and a rear reaction force jack 7 which constitutes a rear propulsion mechanism at the time of segment assembly by the shield machine 1 is mounted. The center shaft 10 is located between the connecting body 8 of the above and the bulkhead 9 of the shield machine 1.
Are connected by. Reference numeral 11 in the drawing denotes a digging jack which also serves as a direction control.

Since the illustrated embodiment is constructed as described above, as shown in FIG. 2 (a), the excavation jack 11 of the shield machine 1 applies a reaction force to the end face of the existing segment 4 for normal excavation. Then, the reaction force is transferred to the rear reaction force support drum 2, all the propulsion jacks 11 are removed, and the segment 4'is assembled as shown by the dotted line. (See FIG. 2B) During this period, the rear reaction force jack 7 and the center shaft 10
To dig a part of the digging amount. At this time, the digging reaction force is supported via the rear reaction force support drum 2. (See FIG. 2C.) Thus, after the assembly of the front segment 4 is completed, the reaction force is again supported on the end surface of the new segment by the excavation jack 11, and the remaining excavation is performed.

During this time, the rear reaction force supporting drum 2 is advanced to prepare for the next excavation. (See FIG. 2C) Then, the state returns to the state of FIG. The above process is repeated and the excavation work is continued. In principle, the direction control is performed by the front excavation jack 11, and the rear reaction force jack 7 is basically excavated in a straight line.

[0013]

As described above, according to the shield machine according to the present invention, the rear reaction force supporting drum is disposed behind the shield machine having the excavation jack, and the rear reaction force supporting drum and the shield machine are provided. Connect with the center shaft,
The rear reaction force support drum supports the excavation reaction force during segment assembly by the shield machine, and the rear propulsion mechanism mounted on the rear reaction force support drum is configured to excavate the shield machine during segment assembly. As a result, you can pull out all the jacks when assembling the segment.
Since excavation can be performed in parallel during segment assembly, the construction speed is greatly increased.

[Brief description of drawings]

FIG. 1 is a sectional view showing an operating state of an embodiment of a shield machine according to the present invention.

2A, 2B, and 2C are cross-sectional views showing a shield excavation process using the propulsion unit.

[Explanation of symbols]

 1 Shield Machine 2 Rear Reaction Force Support Drum 3 Claw-shaped 4 Segment 4'Segment 5 Reaction Box 6 Support Plate 7 Rear Reaction Force Jack 8 Coupling 9 Bulkhead 10 Center Shaft 11 Excavation Jack

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Makita 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Inventor Kazuhiro Higaki 4-6-15 Sendagaya, Shibuya-ku, Tokyo Company Fujita, (72) Inventor Koji Yoshino 4-6-15 Sendagaya, Shibuya-ku, Tokyo Stock Company Fujita (72) Inventor Teruyuki Wake 4-6-1 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. Within

Claims (1)

[Claims] 1. A reaction force support drum is disposed behind a shield machine equipped with an excavation jack, the reaction force support drum and the shield machine are connected by a center shaft, and the rear reaction force support drum is rearwardly propelled. A shield machine that is equipped with a mechanism.