JPH0452359B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a position correction device for a blade shield machine.

[Conventional technology]

Generally, when using a shield machine to excavate a tunnel, etc. with a circular or horseshoe-shaped cross section, the tunnel must be moved forward so that the core of the shield machine matches the preset core of the tunnel, etc. .

[Problem that the invention seeks to solve]

However, due to differences in the geology of the tunnel inner wall surface on the outer peripheral surface of the shield machine, differences in ground resistance, etc., the shield machine tends to cause an eccentric phenomenon in which the shield core and the tunnel core do not match when the shield machine moves forward. Furthermore, when the excavation cross section is circular, a rolling phenomenon in which the shield machine itself rotates within the tunnel is likely to occur when the shield machine moves forward.

In particular, in the case of a blade shield machine that is formed into a cylindrical shape and has a plurality of long and narrow blades that are in contact with the inner wall surface of the tunnel and are slidable in the direction of the shield machine's course, Since each blade is formed to slide separately and independently, when the blade shield machine moves forward, an eccentric phenomenon that causes a mismatch between the shield core and the tunnel core is easily caused. In addition, the bottom blade, which is positioned at the lower part of the blade shield machine, has a ground cross section that is formed in a chord corresponding to the arc of the entire cross section of the shield machine, or is formed in a chevron shape to reduce ground resistance. Therefore, when the blade shield machine moves forward, a rolling phenomenon in which the shield machine rotates within the tunnel is easily caused.

If this eccentricity phenomenon of the blade shield machine is left unaddressed, the blade shield machine will deviate from the set tunnel planning line, making it impossible to excavate a prescribed tunnel. The rolling phenomenon of the blade shield machine also makes it difficult to operate the excavator, etc. inside the shield machine and to assemble the segments.

Therefore, it has been desired to provide a device that can correct eccentricity and rolling phenomena within the tunnel of a blade shield machine.

SUMMARY OF THE INVENTION Therefore, the present invention provides a position correction device for a blade shield machine, which can correct eccentricity when it occurs in a tunnel, and also allows easy correction when rolling occurs. The purpose is to

[Means for solving problems]

In order to solve the above-mentioned problems, the configuration of the present invention is such that a large number of dovetail brackets are provided on a plurality of annular frames arranged at arbitrary intervals, and a large number of blades are attached to each dovetail bracket in the axial direction. In a cylindrical blade shield machine that is slidably fitted along the annular frame, correction cylinders are arranged in symmetrical positions on each annular frame so as to be able to swing back and forth in the radial direction, and correspond to these correction cylinders. A dovetail bracket at the location where the adjustment cylinder is mounted is attached to the tip of the rod of each correction cylinder, and the blade fitted into the dovetail bracket at the location is connected so as to be movable forward and backward in the radial direction.

〔Example〕

The present invention will be explained below based on an example of a shield machine having a set of bottom blades shown in the drawings.

As shown in FIGS. 1 and 2, a blade shield machine 1 equipped with a position correction device according to the present invention has a large number of blades 3 on the outer periphery of a plurality of annular frames 2 arranged at appropriate intervals. are doing. The blade 3 is attached to the annular frame 2 so as to be slidable in its axial direction, that is, in the front-rear direction, as shown by arrow A in FIG. That is, as shown in FIG. 3, a collar piece 3' formed at the top end of the blade 3 is slidably fitted into a dovetail bracket 2' formed on the annular frame 2. It is what it is. The sliding movement of this blade 3 is controlled by the annular frame 2.
The rear end is pivoted to the bracket 4, and the front end is attached to the bracket 4.
a propulsion cylinder 5 connected to the blade 3 via
This is done by. The bracket 4 is fixed to the upper surface of the collar piece 3' at the top of the blade 3 (see FIG. 2).

Furthermore, it goes without saying that the above-mentioned propulsion cylinder 5 is formed in all the blades 3 attached to the outer periphery of the annular frame 2, so that each blade 3 can be separately and independently formed as shown in FIG. Middle arrow A
It can be slid freely in the direction shown. Among the blades 3 attached to the outer periphery of the annular frame 2, the blade 3a corresponding to the lower part of the shield machine 1 has a mountain-shaped ground contact cross section as shown by the broken line in FIGS. 1 and 3. The ground cross section of the other blades 3 is formed into an arc corresponding to the circular arc cross section formed by the blade shield machine 1, but instead of this, the shape of the ground cross section of the lower blade 3a is Of course, the ground cross section of the blade 3 may have an arc shape. Furthermore, in this example,
The blade 3 is formed into a single long, narrow piece, but instead of this, it may be divided in the center and formed into a plurality of front pieces and rear pieces. When the blade 3 is divided into a front piece and a rear piece, it goes without saying that the propulsion cylinder 5 is attached so that the front piece of the blade 3, that is, the front blade, can slide freely. .

The position correction device according to the present invention in the blade shield machine 1 configured as described above is configured as follows.

That is, as shown in FIG.
Brackets 6 are arranged symmetrically on the inside of the lower part of the frame, and each of these brackets 6
The correction cylinders 7 are supported by trunnions so as to be able to swing back and forth in the radial direction, and dovetail groove brackets 2' in the parts corresponding to these correction cylinders 7 are attached to each correction cylinder 7.
It is attached to the tip of the rod 7'.
A collar piece 3 attached to the top end of the bottom blade 3a is attached to the dovetail bracket 2' at this location.
These bottom blades 3a are attached to the annular frame 2 so as to be slidable in the axial direction (direction indicated by arrow A in FIG. 2) by fitting the bottom blades 3a into the annular frame 2. Therefore, the bottom blade 3 is positioned symmetrically in the lower part of the blade shield machine 1.
a can move forward and backward in the radial direction of the annular frame 2 (in the direction indicated by arrow B in FIG. 4) by extending the correction cylinder 7 and by contracting it after the extension. In addition, this modified cylinder 7
are separately and independently attached to the front half and rear half of each of the left and right bottom blades 3a, so that only one of the left and right bottom blades 3a or either the front half or the rear half of each bottom blade 3a can be used. It is possible to advance and retreat only.

The bottom blade 3a is slidably attached to the annular frame 2 by fitting a collar piece 3a' at the top end into a dovetail bracket 2' connected to the tip of the rod 7' of the correction cylinder 7. At the same time, a bracket 4 is fixed to the upper surface of the collar piece 3a' at the top end thereof, and has a propulsion cylinder 5 whose front end is connected to the bracket 4 and whose rear end is pivotally connected to the annular frame 2. . Therefore, regardless of whether the bottom blade 3a moves forward or backward, by extending the propulsion cylinder 5, it is possible to move it forward in its axial direction (direction indicated by arrow A in FIG. 2). .

The position correction device for the blade shield machine 1 according to the present invention configured as described above is used in the following manner.

When the blade shield machine 1 is eccentric in the tunnel as shown by the solid line in Fig. 5A, one of the bottom blades 3a (see Fig. 1), which are positioned symmetrically in the lower part of the blade shield machine 1,
For example, the rear correction cylinder 7RR installed on the bottom blade 3a on the right side (upper part of Fig. 5)
and the other, that is, the front correction cylinder 7LF installed on the left bottom blade 3a (bottom blade in FIG. 5A) are extended at the same time. As a result, the eccentric state, that is, the position, is corrected so that the core of the blade shield machine 1 coincides with the core of the tunnel, as shown by the two-dot chain line in FIG. 5A.

Furthermore, when the blade shield machine 1 rolls in the tunnel as shown by the solid line in Fig. 5B, the bottom blade 3a (see Fig. 1), which is positioned symmetrically in the lower part of the blade shield machine 1, On the other hand, by rolling, the correction cylinder 7L installed in the bottom blade 3a on the side that is biased toward the tunnel inner wall surface (the left side in FIG. 5B) is extended. As a result, the rolling state or position is corrected so that the horizontal reference plane of the blade shield machine 1 coincides with the horizontal reference plane of the tunnel, as shown by the two-dot chain line in FIG. 5B. In addition, by combining these correction operations with the forward movement of the blade, corrections can be made even more easily. In addition, when correcting the rolling, in order to prevent the blade shield machine 1 from rotating more than necessary, use the correction cylinder 7R installed on the bottom blade 3a on the opposite side (right side in Figure 5). Of course, it can be extended as appropriate to serve as a stopper.

After correcting the eccentricity and rolling of the blade shield machine 1 as described above, the annular frame 2
The blade shield machine 1 is moved forward by appropriately and selectively sliding the blade 3 attached to the outer periphery of the blade shield machine 1. At this time, the bottom blade 3a is of course slid forward by the propulsion cylinder 5 in the same way as the other blades 3 by contracting its correction cylinder 7.

What has been described above is an example in which the bottom blades are arranged as a set of symmetrical bottom blades, but if the bottom blades that can move back and forth in the axial direction are also provided in a symmetrical position above the shield machine ( Of course, the same effect can be expected even if a plurality of shields are provided symmetrically below the shield machine (see FIG. 6B).

Furthermore, it goes without saying that even if the blade shield machine has a horseshoe-shaped cross section, the present invention can be applied in exactly the same manner as described above.

〔Effect of the invention〕

According to the present invention, there are the following effects.

The bottom blade that constitutes the blade shield machine is made to be able to slide freely in the axial direction of the annular frame like the other blades, and also to be able to move forward and backward in the radial direction of the annular frame via a dovetail bracket and a correction cylinder. Therefore, even if the blade shield machine becomes eccentric or rolls in the tunnel when it moves forward, the eccentricity or rolling can be easily corrected using the bottom blade. . As a result, it is not only possible to advance the blade shield machine accurately along the tunnel planning line, but also makes it difficult to operate the cutting machine inside the blade shield machine and assemble the segments due to rolling. It is possible to avoid the inconvenience that would otherwise occur.

[Brief explanation of the drawing]

FIG. 1 is a rear front view of a blade shield machine equipped with a position correction device according to the present invention, and FIG.
3 is a partial sectional view showing how the blade is attached to the annular frame; FIG. 4 is a longitudinal sectional view of the blade shield machine indicated by the line - in the figure; FIG. 4 is a partial sectional view showing how the blade is attached to the annular frame; and FIG. Figure 5A is a schematic plan view showing how the position of the blade shield machine is corrected when it is eccentric in the tunnel, and Figure 5B is a rear view showing how the position of the blade shield machine that has rolled in the tunnel is corrected. The schematic diagrams, FIG. 6A and FIG. 6B, are views showing other embodiments in the same way as FIG. 1. 1... Blade shield machine, 2... Annular frame, 2'... Dovetail bracket, 3... Blade,
3a...Bottom blade, 3'...Brim piece, 3a'...
...Flame piece, 4... Bracket, 5... Propulsion cylinder, 6... Bracket, 7... Correction cylinder,
7'...Rotsudo.

Claims (1)

[Claims] 1. A cylindrical blade shield machine in which a number of dovetail brackets are provided on a plurality of annular frames arranged at arbitrary intervals, and a number of blades are slidably fitted in each dovetail bracket in the axial direction, Correction cylinders are arranged at symmetrical positions on each annular frame so as to be able to swing back and forth in the radial direction, and dovetail brackets corresponding to these correction cylinders are attached to the rod tips of each correction cylinder. A position correction device for a blade shield machine, characterized in that a blade fitted in a dovetail groove bracket of the part is connected so as to be movable forward and backward in the radial direction.