JPH02256793A - Attitude controlling of shield machine - Google Patents

Abstract

PURPOSE:To set a curve accurately and to amend meandering by pushing the outside with a driving jack, pulling the inside with a center hold jack while controlling the length of a rod, and placing a shield machine so that it may not go back over its way. CONSTITUTION:One end of a rod 6 parallel with a skin plate 1 is fixed to a partition 5 provided in the vicinity of the rear of a driving jack 3. After that, the other end of the rod 6 is mounted to a bearing member 8 fixed to a segment 4 through a center hold jack 9. Then, the driving jack is expanded to drive a shield machine and, at the same time, the rod of the jack 9 is reduced at the inside of a curved direction, generating tensile force to swivel the shield machine. Furthermore, a nut 10 is loosened to expand the rod 6 to the side of a facing, and the jack 9 is reset to swivel and advance forward as well. According to the constitution, the shield machine is always pulled to a curved direction, and it can swivel smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for controlling the attitude of a shield machine when excavating a shield tunnel.

``Prior art and its problems'' Conventionally, the attitude control method for this type of shield machine was to overcut and use the outer shield jack to propel the machine when installing on curves or correcting meandering. It has been known.

However, with this method, there was a problem that due to insufficient reaction force, it was not possible to operate in a well-balanced manner only by pushing the jack when curve installation and meandering correction were performed simultaneously.

Therefore, in addition to pushing with the outer shield jack, curved excavation was carried out by pulling with the inner steel rod or wire, as shown in Fig. 7.

Here, a method of controlling the attitude of a conventional shield machine equipped with the above-mentioned steel rod is shown using FIG. A propulsion jack 3 is fixed to the plate 2. And the cylinder rod 3 protruding from the propulsion jack 3
The threader 3b fixed to the rear end of the skin plate 1 has segments 4, 4.a assembled inside the skin plate 1. ...
It is designed to press the end face of the A bulkhead 5 is provided near the rear of the propulsion jack 3, and a tension steel rod 6 is fixed with a nut 7 between the bulkhead 5 and a predetermined location of the segment. ing.

However, when fixing the steel rod (or wire) to the segment side with a nut, it is necessary to reposition it each time it is propelled, which may cause the shield machine to return to its original position each time, or cause the shield machine to return to its original position. There was a problem that when the force became large, the steel rod (or wire) would break.

The present invention has been made in view of the above-mentioned problems, and is an attitude control system for a shield machine that enables continuous propulsion and allows smooth installation of curved lines and correction of meandering without the shield machine body returning to its original position. The purpose is to provide a method.

"Means for Solving the Problems" The present invention provides a pressing force of a propulsion jack provided along the circumferential direction of the rear inner circumferential surface of a skin plate, and one end of which is fixed to the inside of the skin plate and is attached to a segment. The problem is solved by utilizing the tensile force of a rod whose other end is fixed to the segment via a removable center hole jack.

"Function" In the attitude control method for a shield machine of the present invention, the outer side of the propulsion jack is pressed symmetrically with respect to the direction in which the propulsion jack should be bent (up, down, left and right), and the inner side is pressed with a rod by the center hole jack. By pulling while adjusting the length of the rod, that is, when the pressure of the center hole jack exceeds the set pressure as the skin plate is propelled, the rod of the center hole jack shrinks (.
Since the tensile force is maintained by the pressure set at this time, the skin plate will not return to its original state (curve installation and meandering correction can be performed accurately and reliably).

"Example" The present invention will be described below with reference to the drawings.

1 to 6 show an embodiment of the attitude control method for a shield aircraft according to the present invention.

In this embodiment, the same reference numerals are given to the same elements as those shown in the conventional technique.

First, the configuration of the attitude control device for a shield aircraft according to this embodiment will be explained using FIG. Reference numeral 1 indicates a cross section of a part of the skin plate of the shield machine (inside in the direction in which the shield machine bends), and a partition plate 2 is fixed to the tip side of the skin plate l. In this case, the propulsion jack 3 is fixed. And propulsion jack 3
The thread/nodder 3b fixed to the rear end of the cylinder rod 3a protruding from the segment 4,4. It is designed to press the end face of the frontmost part of...

A partition 5 is provided near the rear of the propulsion jack 3, and one end of a rod 6 extending parallel to the skin plate is fixed to the partition 5 by nuts 5a, 5b. The other end of the rod 6 is attached via a center hole jack 9 to a support member 8 fixed to a predetermined location of the segment 4 (in this embodiment, the location of the third ring from the shield machine side). It is being

The center hole jack 9 is attached to the support member 8 by a nut lO of the rod 6, and is configured to change its position in accordance with the propulsion of the shield machine.

Next, a method for controlling the attitude of a shield machine according to the present invention will be explained.

(i) First, as shown in FIG. 2, set the center hole jack 9 on the inside in the direction in which the shield machine bends.

(ii) Next, as shown in FIG. 3, the propulsion jack 3 is extended and the shield machine is propelled by the pressing force of the propulsion jack. At this time, the rod of the center hole jack 9 is contracted on the inner side of the illustrated bending direction, and a tensile force of the rod is generated, thereby causing the shield machine to turn.

(iii) Next, as shown in FIG. 4, after loosening the nut 10 of the rod 6 of the center hole jack 9 and extending the rod 6 toward the face side, the center hole jack 9 is set.

(iv) Next, as shown in Fig. 5, the shield machine body is propelled and the rod of the center hole jack 9 is contracted, so that the shield machine is turned by the pushing force of the propulsion jack and the tensile force of the rod. .

(v) Next, as shown in FIG.
, (iii) are repeated to complete the process by propelling the shield machine body one ring.

Thereafter, the operations (i) to (v) above are repeated.

As described above, according to the shield machine attitude control method of this embodiment, the pressing force of the propulsion jack 3 provided along the circumferential direction of the skin plate 1 and the tensile force of the rod fixed to the segment 4 can be Since the direction of movement of the shield machine is controlled by using At this time, the tensile force is maintained by the set pressure, so the shield machine body will not return to its original state (
Promotion becomes possible.

"Effects of the Invention" As explained in detail above, in the shield machine attitude control method of the present invention, the pressing force of the propulsion jack provided along the circumferential direction of the skin plate and the center hole jack The bending direction is controlled by using the tensile force of the rod fixed to the segment via the center hole jack, so the stroke is secured by the center hole jack, so there is no interruption in propulsion. In addition, since the center hole jack can always pull the shield machine in the direction in which it should turn, it is possible to smoothly set up curves and correct meandering without returning the main body of the shield machine to its original position.

[Brief explanation of drawings]

1 to 6 show an embodiment of the attitude control device for a shield machine according to the present invention, and FIG. 1 is a cross-sectional view of a part of the shield machine showing the attitude control device, which is the main part of the present invention. 2, 3, 4, 5, and 6 are explanatory diagrams for explaining the action of the attitude control device of the present invention, and are sectional views of the main parts of the shield machine. The figure is a diagram showing a conventional technique, and is a sectional view of a part of a shield machine showing an attitude control device. l...Skin plate, 3...Propulsion jack, 4...Segment, 6...Watt, 9...Center hole jack.

Claims (1)

[Claims] The pressing force of the propulsion jack provided along the circumferential direction of the rear inner peripheral surface of the skin plate and the center hole jack whose one end is fixed to the inside of the skin plate and which is detachable from the segment are used to increase the pressure on the other end of the skin plate. A shield machine attitude control method that uses the tensile force of a rod fixed to a segment to control the direction of movement of the shield machine.