JPH1077779A - Parent/offspring shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parent/offspring shield machine which is useful, economical, and suitable for construction of a shifting part between a single track part and a double track part by arranging sub-cutters capable of projecting from the outer circumference on the main cutters of a parent machine and a offspring machine. SOLUTION: An offspring machine 2 is housed in the interior of a parent machine 1, and integrated excavation by the parent machine 1 together with the offspring machine 2 and single excavation by only the offspring machine 2 departing from the inside of the parent machine 1 are made possible. In this parent/offspring shield machine, the sectional outer of the shell of the parent machine 1 is constructed into an elliptical form, and the main cutters 13, 23 of the parent machine 1 and the offspring machine 2 are arranged so as not to interfere with the end part in the excavation direction of the parent machine 1. Sub-cutters 3,... capable of projecting from the outer circumference are arranged on the main cutters 13, 23, and hence the parts which can not be excavated by the main cutters 13, 23 in the sectional outer shape of the shell of the parent machine 1 can be excavated. Hereby, useful and economical execution is made possible, and in addition it can be suitable even for a shifting part between a single track part and a double track part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a parent-child shield machine.

[0002]

In recent years, the number of cases where a single-track section and a double-track section of a subway tunnel and their transition section are constructed by a shield machine has been increasing. However, FIG.
In the case of a circular shield a having a large cross section adapted to a double track section as shown in FIG.
In the case of a multiple shield b as shown in FIG. 6, a column c is required in the middle, which is inconvenient for the construction of the transition portion.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a parent-child shield machine which is economical without waste and is suitable for the construction of a transition part between a single track part and a double track part. The purpose is to provide.

[0004]

According to the present invention, as a means for solving the above-mentioned problems, according to the present invention, a slave unit is housed in a master unit, and excavation by the master unit and the slave unit is performed. In the parent-child shield machine, which allows excavation only by the child machine started from the parent machine, the outer shape of the outer shell of the parent machine is formed into an elliptical shape, and the main cutter of the parent machine and the child machine is located at the end of the parent machine in the excavation direction. The main cutter is provided with a sub-cutter that can protrude from the outer periphery of the main cutter, and the sub-cutter can be used to excavate parts that cannot be excavated with the main cutter in the cross-sectional outline of the parent machine outer shell. A parent-child shield machine is provided.

According to a second aspect of the present invention, in the parent-child shield machine according to the first aspect, the main cutter of the parent machine is formed by cutting out a portion overlapping with the main cutter of the child machine to start the child machine. The present invention provides a parent-child shield machine characterized in that the outer shell of the slave unit is configured not to contact at the time.

According to a third aspect of the present invention, in the parent-child shield machine according to the first or second aspect, in a portion where the outer shells of the parent device and the child device are close to each other, the shield is provided at a tip of a shield jack of the child device. Provided is a parent-child shield machine, characterized in that a tunnel plate constructed along an inner peripheral surface of a parent machine outer shell can be pressed by a pressing plate.

According to a fourth aspect, in the parent-child shield machine according to any one of the first to third aspects,
In a portion where the outer shells of the master unit and the slave unit are close to each other, a tunnel body constructed along the inner peripheral surface of the master unit shell by a common pressing plate provided at the tip of the shield jack of the master unit and the slave unit. A parent-child shield machine characterized by being configured to be able to press.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. <A> Outer Shell of Master Unit As shown in FIG. 1, the outer shell 11 of the master unit 1 has an elliptical cross section. The cross-sectional dimension of the outer shell 11 is set to include the double track section of the subway tunnel, but is not wasteful because it is not a conventional circular shield having a large cross section.

<B> Outer Shell of Slave Unit The outer shape of the outer shell 21 of the slave unit 2 is circular, and
, And have a size as close as possible to the outer shell 11 of the parent machine. In the case of the present invention, both outer shells 11 are used as described later.
It is not necessary to dispose a shield jack for the master unit on the inner peripheral surface of the master unit 1 in the vicinity of the base unit 1 and 21. Therefore, the dimension of the outer shell 21 of the slave unit 2 can be maximized as described above, and the amount of protrusion of the sub-cutter described later can be reduced.

The length of the outer shell 21 of the slave unit 2 in the axial direction is, as shown in FIG. 3, from the end in the digging direction to the ring girder portion 22 supporting the shield jack.

<C> Main cutter A main cutter 23 of a face plate type is provided in front of the outer shell 21 of the slave unit. A main unit main cutter 13 is provided on the front partition 12 of the main unit 1 on both sides of the main cutter 23 of the sub unit 2 and on the rear side. The main cutters 13 and 23 do not interfere with each other by being disposed before and after.

The main unit main cutter 13 is formed with cutouts 14 at portions overlapping the main unit main cutter 23 so that the outer shell 21 of the sub unit 2 does not come into contact when the sub unit 2 starts moving. .

<D> Sub cutter A sub cutter 3 is provided between the spokes of the main cutters 13 and 23 of the parent machine 1 and the child machine 2 so as to protrude from the outer periphery thereof.
The sub-cutter 3 is configured to be able to excavate a portion that cannot be excavated by the main cutters 13 and 23 in the cross-sectional outline of the parent machine outer shell 11.

The sub-cutter 3 supports, for example, one end of an ax-shaped cutter or the like, and connects a hydraulic jack 31 to the other end thereof.
It is configured to protrude from the outer periphery of 3, 23 and to be stowable. The protrusion amount of the sub cutter 3 is controlled by a computer.

<E> Shield Jack As shown in FIG. 2, the shield jack 4 is provided along the inner peripheral surface of the outer shell 21 of the slave unit, and the The shield jack 5 is provided except for a portion where the outer shell 21 is close.

<F> Pressing plate As shown in FIG. 3, the shield jacks 4 and 5 are supported by ring girder portions 22 and 15, respectively, and a pressing plate 6 is attached to the tip of the jack rod. As shown in FIG. 2, the pressing plate 6 is mounted on the rod ends of the two shield jacks 4 and the single shield jack 5 and is mounted on the rod ends of only the shield jack 4. Press plate 6b.

The two shield jacks 4 and the one shield jack 5 that share the pressing plate 6a have the same hydraulic piping and are configured so that three expand and contract simultaneously. These pressing plates 6a and 6b are both shown in FIG.
As shown in (1), the main body has a shape and dimensions capable of pressing a tunnel body such as the segment 7 assembled along the inner peripheral surface of the outer shell 11.

[0018]

[Function] During the construction of the double track section of the subway tunnel, each of the main cutters 13 and
Excavation is performed by rotating 23. Excavation is performed by protruding the sub-cutter 3 by an appropriate amount under computer control for a portion that cannot be excavated by the main cutters 13 and 23 within the cross-sectional outline of the parent machine shell 11.

At this time, the elliptical minor diameter of the parent machine shell 11 is
Since the outer diameter of the slave unit outer shell 21 is made as close as possible, the amount of protrusion of the sub cutter 3 can be minimized, and controllability can be improved, and the size and cost of the device can be reduced.

The propulsive force of the master unit 1 is a shield jack 5
And the shield jack 4 equipped with the pressing plate 6 generate the force by pressing the segment 7. Therefore, the jack propulsion force can be sufficiently obtained even in a portion where the master device 1 cannot be equipped with the shield jack.

When the construction site of the single track section is reached, as shown in FIG. 1, the parent machine main cutter 13 is stopped at a position where the notches 14 face each other. And child unit 2
Assemble the segment behind the main unit 1 and
For the construction of the single track section.

[0022]

[Other Embodiments] FIG.
The slave unit 81 is arranged at an eccentric position in the inside, and a master unit main cutter 83 is arranged adjacent to the main cutter 82 of the slave unit 81. Also in this case, a cutout portion 84 is formed in the main cutter 83, and a sub cutter 85 is provided in both the main cutters 82 and 83. In a portion where the shield jack is not provided on the inner surface of the outer shell 8 of the master unit, a pressing plate shared by the shield jack of the master unit and the slave unit is provided by a shield jack provided in the slave unit. It is configured to be able to press the segment via.

[0023]

As described above, according to the present invention, since the outer shell of the master unit is made elliptical, economical construction is possible without waste, and columns are unnecessary because there is no constriction unlike a multiple shield. It is also suitable for the construction of the transition section between the single track section and the double track section.

[Brief description of the drawings]

FIG. 1 is a front view of a parent-child shield machine of the present invention.

FIG. 2 is an explanatory view of a shield jack and a pressing plate.

FIG. 3 is an explanatory view of a shield jack and a pressing plate.

FIG. 4 is an explanatory view of another embodiment.

FIG. 5 is an explanatory view of a conventional technique.

FIG. 6 is an explanatory view of a conventional technique.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masahiro Nakamura 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation

Claims (4)

[Claims] 1. A parent-child shield machine in which a child machine is housed inside a parent machine, and excavation by the parent machine and the child machine is enabled, and sole excavation by only the child machine started from inside the parent machine is provided. The outer shape of the outer shell is formed in an elliptical shape, and the main cutter of the master unit and the slave unit are arranged so as not to interfere with the ends of the master unit in the excavation direction. A parent-child shield machine, wherein the sub-cutter is configured so that a portion that cannot be excavated by the main cutter in the cross-sectional shape of the outer shell of the parent machine can be excavated by the sub-cutter. 2. The parent-child shield machine according to claim 1, wherein the main cutter of the parent machine is formed by cutting out a portion overlapping the main cutter of the child machine, and the main cutter is provided outside the child machine when the child machine starts moving. A parent-child shield machine characterized in that the shells do not touch each other. 3. The parent-child shield machine according to claim 1, wherein a portion of the outer shell between the parent device and the child device is close to each other by a pressing plate provided at a tip of a shield jack of the child device. A parent-child shield machine characterized in that it is configured to press a tunnel skeleton constructed along the inner peripheral surface of an outer shell. 4. The parent-child shield machine according to claim 1, wherein a portion where the outer shells of the parent device and the child device are close to each other is disposed at a tip of a shield jack of the parent device and the child device. A parent-child shield machine characterized in that a common pressing plate is used to press a tunnel body constructed along an inner peripheral surface of an outer shell of a parent machine.