JPH10280866A - Shield excavating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost and improve the efficiency of work with a simple structure by providing a tunnel constructing part on the rear end side, and connecting a plurality of excavating blocks in the front of a protruding curved surface-like body block on the front end in such a mariner as to be movable along the protruding curved surface. SOLUTION: When an excavating machine 1 is rolled, it is advanced with, for example, a left excavating block 9 downward and a right excavating block 11 upward, and the resisting force of the bedrock acts thereon as rolling force. The excavating machine 1 is rolled, turned in direction or widened only by vertically and laterally moving the left and right excavating blocks 9, 11 along the protruding curved surface of a body block 3. Further, when the excavating machine 1 is widened, it is advanced while excavating by a copy cutter by a distance capable of widening the left and right excavating blocks 9, 11. Thereafter, only the left and right excavating blocks 9, 11 are widened, and the excavating machine 1 is advanced while excavating by excavating mechanisms 5, 7. Thus, the widening work can be efficiently performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield machine for excavating underground to construct a tunnel.

[0002]

2. Description of the Related Art For example, Japanese Unexamined Patent Publication (Kokai) No. 6-146776 discloses a multiple shield excavator in which the body of a shield excavator is widened and excavated when the cross section of a part of a tunnel is to be changed. FIG. 10 is a plan sectional view of the multiple shield excavator disclosed in the above publication. As shown in FIG. 10, the conventional multiple shield excavator includes circular left and right main cutters 51 and 52 and a circular sub-cutter 53 positioned on the back side between them. It is configured to have left and right main shield portions 57 and 59 and a sub shield portion 61 at the center, which are rotatably mounted on the front portion of a shield frame 55 having a contour shape corresponding to the front shape of the shield frame 55. is there.

[0003] The shield frame 55 includes a main cutter 5.
The main shield frame parts 55a, 55 which are divided into three parts in the direction parallel to the axis of
5b and a central shield frame 55c. Each of the divided portions is provided with a slide guide mechanism capable of sliding a predetermined amount in the left and right direction, and by sliding the left and right main shield portions 57 and 59 relative to the central sub shield portion 61 in the left and right direction, respectively. It is configured to be able to widen.

As a technique for facilitating excavation at a sharp curvature during tunnel excavation, for example, Japanese Patent Application Laid-Open No. 3-208987 discloses a technique.
There is known a multiple-type half-fold shield excavator having a half-folding function as disclosed in Japanese Unexamined Patent Publication (Kokai) Publication.

Further, in shield construction, due to various conditions such as soil conditions, construction method, and balance of the center of gravity of the shield machine, the shield machine gradually excavates in a plane perpendicular to the excavation axis while excavating. Rolling may occur. Rolling of the shield machine as described above adversely affects the workability and the assembling accuracy of the segments, and so it is necessary to correct the rolling and return to a normal posture. In some cases, it is necessary to construct a tunnel spirally by digging while rolling the shield machine in order to plan the construction alignment.

As a technique for rolling the shield machine from such a necessity, for example, a multi-section shield machine as disclosed in Japanese Patent Application Laid-Open No. 3-281892 shown in FIG. There is a method in which the 70 is divided into a structure that can be bent in the vertical direction, and a rotational force is generated using this structure.

[0007]

[0005] In recent years, diversification of shield work has required complicated shield work, and has also been required to improve work efficiency. However, each shield machine described above has one of a widening function, a center bending mechanism, and a mechanism for generating a rolling force, and is not capable of coping with recent complicated and diverse shield works. Absent. Therefore, it is conceivable to mount each of the above-mentioned conventional mechanisms on a single shield machine, but if the conventional mechanism is used, the shield machine becomes large, which is not preferable in terms of cost, construction efficiency, and the like. Will be. Under such circumstances, the development of a shield machine having a simple structure and a plurality of functions has been desired.

The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a shield machine having a simple structure and a plurality of functions.

[0009]

A shield machine according to the present invention includes a main body block having a tunnel construction portion on a rear end side and a convex curved surface curved in a horizontal direction and a vertical direction at a front end. A front end side has an excavating mechanism, and a rear end is formed with a concave curved surface along the convex curved surface, and the concave curved surface is arranged in front of the main body block along the convex curved surface with the concave curved surface facing the convex curved surface. And a plurality of digging blocks movably connected to each other.

[0010] Further, the main body block includes a plurality of tunnel building blocks that can be widened in the width direction.

[0011]

FIG. 1 is a perspective view of a shield machine according to an embodiment of the present invention. In the figure, reference numeral 1 denotes a shield excavator, which is a main body block 3 having a substantially T-shaped cross section, and left and right excavation blocks 9, 11, which are installed at the front left and right of the main body block 3 and have excavation mechanisms 5, 7 at the front end side. It comprises left and right building blocks 13 and 15 which are installed on the right and left rear portions of the main body block 3 and have a tunnel building portion on the rear end side.

As shown in FIG. 2, the main body block 3 has a convex curved surface 3a curved in the horizontal and vertical directions at its front end, and communicates with the left and right excavation blocks 9, 11 near the center of the convex curved surface 3a. Contact ports 17 and 19 are provided. At the rear end side of the main body block 3, a tunnel construction section 3b for constructing a tunnel is provided. At the rear ends of the left and right excavation blocks 9 and 11, concave curved surfaces 9a and 11a are formed along the convex curved surface 3a of the main body block 3. And the left and right excavation blocks 9 and 11 are concave curved surfaces 9a and 11a.
Are connected to the main body block 3 so as to be movable in the up, down, left, and right directions along the convex curved surface 3a in a state of facing the convex curved surface 3a of the main body block 3. Left and right building block 1
The reference numerals 3 and 15 are configured to be able to widen in the width direction with respect to the main body block 3.

FIG. 3 is a plan sectional view of the shield machine 1 shown in FIG. 1, and FIG. 4 is an enlarged view of a portion C encircled in FIG. Hereinafter, based on FIGS. 3 and 4, the shield machine 1
The structure of the connecting portion between the left and right excavation blocks 9 and 11 and the main body block 3 will be described. 3 and 4, reference numerals 21 and 23 denote connecting pipes formed substantially at the center of the concave curved surfaces 9a and 11a of the left and right excavating blocks 9 and 11 so as to protrude rearward.
23a are respectively formed. Also, the flange 21
Projections 21b, 2 protruding forward on the outer peripheral portions of
3b are respectively formed. Left and right excavation block 9,
Reference numeral 11 denotes the connecting pipes 21 and 23 and the communication port 1 of the main body block 3.
7, 19, and the protrusions 2 of the flanges 21a, 23a
1b and 23b are brought into contact with the inner surfaces of the edges of the communication ports 17 and 19, and the convex curved surface 3a of the main body block 3 and a part of the concave curved surfaces 9a and 11a of the left and right excavation blocks 9 and 11 are brought into contact with each other. 3 is connected. Further, ring-shaped water-stop packings 25 and 26 are provided at the respective contact portions. A certain gap is provided between the connection pipes 21 and 23 and the communication ports 17 and 19, and the left and right excavation blocks 9 and 1 are provided.
Numeral 1 is configured to be able to move in any direction such as up, down, left and right by the amount of the gap.

FIG. 5 is a sectional view taken along the line AA in FIG. In the figure, 27a, 27b through 33a, 33b
(In FIG. 5, a suffix a is attached to a portion related to the left excavation block 9 and a suffix b is attached to a portion related to the right excavation block 11). The jacks 27a, 27b through 33a, 33b are extended and contracted to move the left and right excavation blocks 9, 11 relative to the main body block 3, respectively. Can be. That is, by expanding and contracting the jacks 27a, 27b and 29a, 29b, the left and right excavation blocks 9, 11 can be moved right and left, and the jacks 31a, 31b, 33a, 33a,
By expanding and contracting 33b, the left and right excavation blocks 9,
11 can be moved up and down.

Next, the operation of the present embodiment configured as described above for excavating the ground will be described. At the time of excavation, when the shield excavator 1 is to be rolled, as shown in FIG. 6, for example, by excavating with the left excavation block 9 facing downward and the right excavating block 11 facing upward, The resistance acts as a rolling force, and the shield machine 1 can be rolled. In the state shown in FIG. 6, a clockwise rolling force acts. In order to generate the rolling force in the counterclockwise direction, the excavation may be performed with the left excavation block 9 facing upward and the right excavation block 11 facing downward.

If it is desired to change the course upward during excavation, the excavation may be performed with both the left and right excavation blocks 9, 11 facing upward, as shown in FIG. When it is desired to change the course downward, the digging may be performed with both the left and right excavation blocks 9 and 11 facing downward. Further, when it is desired to change the course to the right, as shown in FIG. 8, the excavation may be performed with both the left and right excavation blocks 9, 11 facing right. To change the course to the left, the digging may be performed with both the left and right digging blocks 9 and 11 facing left.

Further, when it is necessary to increase the tunnel width during the excavation, as shown in FIG. 9, the excavation is performed while moving the left and right excavation blocks 9 and 11 in the left and right directions, respectively. When 15 has advanced to the point where widening is possible, the left and right building blocks 13, 1
5 is widened. FIG. 9 shows left and right excavation blocks 9 and 1
1 shows a state in which both the left and right building blocks 13 and 15 are widened.

As described above, according to this embodiment, the shield excavator can be rolled only by moving the left and right excavation blocks 9 and 11 in the vertical and horizontal directions along the convex curved surface of the main body block 3. , Can be turned around, and can be further widened. In addition, the mechanism for moving the left and right excavation blocks 9 and 11 is extremely simple, and the in-machine space can be effectively used.

Further, since the left and right excavation blocks 9, 11 and the left and right construction blocks 13, 15 can be independently widened, when the shield machine 1 is widened, at least the left and right excavation blocks 9, 11 can be widened. If the digging is performed while digging by the copy cutter by a distance, only the left and right digging blocks 9 and 11 are widened thereafter, and the digging can be performed while digging by the digging mechanisms 5 and 7, so that the widening work can be performed efficiently.

In the above embodiment, a jack has been described as an example of a drive device for moving the left and right excavation blocks 9 and 11, but it is needless to say that other existing drive devices can be used. Nor.

[0021]

As described in detail above, in the present invention, a convex curved surface which is curved in the horizontal and vertical directions is formed at the front end of the main body block, and the convex curved surface is formed at the rear end of the plurality of excavation blocks. A plurality of excavation blocks are formed by forming a concave curved surface along the convex curved surface and movably connecting the plurality of excavating blocks in front of the main body block along the convex curved surface in a state where the concave curved surface is arranged to face the convex curved surface. Can be individually moved in the up, down, left, and right directions, and by moving these plurality of excavation blocks, the functions of rolling, turning, and widening can be exhibited. In addition, in the present invention, since the excavation resistance received from the front surface via the excavation block is received by the convex curved surface, the resistance shown in FIG. 11 is received by the so-called half-fold jack installed at the bent portion (center-fold portion). There is no need to install a large number of half-fold jacks as in the case of this, and the cabin space can be widened.

Further, since the main body block is provided with a plurality of tunnel building blocks that can be widened in the width direction, tunnels having different cross-sectional areas can be built in accordance with the widening of the excavation blocks.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shield machine according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main body block 3 shown in FIG.

FIG. 3 is a horizontal sectional view of FIG. 1;

FIG. 4 is an enlarged view of a portion C indicated by a circle in FIG.

5 is a sectional view of the shield machine shown in FIG.

FIG. 6 is an explanatory diagram of a rolling operation according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram of a vertical turning operation according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram of a left-right turning operation according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram of a widening operation according to the embodiment of the present invention.

FIG. 10 is a plan sectional view of a conventional multiple shield excavator having a widening mechanism.

FIG. 11 is an explanatory view of a conventional multiple shield excavator having a center bending mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Shield machine 3 Body block 3a Convex surface 5,7 Excavation mechanism 9 Left excavation block 11 Right excavation block 9a, 11a Concave surface 13 Left construction block 15 Right construction block 27a, 27b, 29a, 29b, 31a, 31b, 3
3a, 33b jack

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Osamu Watanabe 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Fumio Unosawa 1-2-1, Nishishinjuku, Shinjuku-ku, Tokyo Inside Taisei Corporation (72) Inventor Masayuki Nishibuchi 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Akira Kobayashi 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Japan Inside Kokan Co., Ltd. (72) Inventor Tomoyuki Hayashi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd.

Claims (2)

[Claims] 1. A main body block having a tunnel construction portion at a rear end side and a convex curved surface curved in a horizontal direction and a vertical direction at a front end, an excavation mechanism at a front end side, and a rear end at a rear end. A plurality of excavation blocks formed with a concave curved surface along the convex curved surface and connected to the front of the main body block movably along the convex curved surface in a state where the concave curved surface is arranged to face the convex curved surface. A shield machine. 2. The shield machine according to claim 1, wherein the main body block includes a plurality of tunnel building blocks that can be widened in a width direction.