JP2917232B2 - Double shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double shield tunneling machine for constructing a double shield tunnel having two continuous sections.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 1-278696 discloses a double shield excavator capable of freely changing the cross-sectional configuration of a tunnel from two horizontal to two vertical or from two vertical to two horizontal. Things have been suggested. In the shield machine described in the specific example of this publication, two front bodies having a D-shaped cross section are individually bendably connected to a common rear body having a cross-sectional shape of the eyebrows by respective oscillating mechanisms (center bending mechanisms). It has a structure.

[0003]

Therefore, there are the following problems. Since it has a complicated structure in which two front bodies having a D-shaped cross section are joined to one rear body having a cocoon-shaped cross section, the production cost is high. It is difficult to machine the sliding part between the two front bodies. Since the skin plate of the rear body has a narrowed eyebrow-shaped cross section in the middle, which is disadvantageous in terms of stress as compared with a circular shape, it is necessary to increase the thickness of the skin plate. The bending control of the two front bodies is complicated.
Since the double tunnel section has a form in which two D-shaped sections are aligned in opposite directions, the lining also has a special shape, and the use of the deformed segment increases the segment cost and the construction cost.

SUMMARY OF THE INVENTION An object of the present invention is to solve such problems, to reduce the manufacturing cost by simplifying the structure of a shield machine, to increase the strength against stress, and to facilitate excavation control. The lining is also to be able to cope with only normal segments.

[0005]

SUMMARY OF THE INVENTION A double shield excavator according to the present invention includes a first single-section shield excavator whose front trunk can be bent with respect to a rear trunk, and a second shield excavator whose front and rear parts are integrated. It is characterized in that the single-section shield machine is pin-joined so as to be relatively rotatable in parallel.

[0006] The first and second single section shield machine can be separably pinned.

[0007]

The dual shield machine according to the present invention basically has two
The single-section shield machine is simply connected in parallel and pin-joined, and since the single-section shield machine has independent single sections, it is advantageous in terms of stress against external force. Therefore, the number of stiffening ribs of the skin plate can be reduced, and the thickness of the skin plate can be reduced. In addition, the lining has a form in which two circular single-section lining parts which are independent and separated from each other are simply joined in series.
Only one single-section shield excavator has a structure in which the front torso is bent with respect to the rear torso, so when it is bent and propelled, it turns around the other single-section shield excavator. While digging.

Further, since the first and second single-section shield excavators are pin-joined so as to be relatively rotatable, the directivity directions of the single-section shield excavators are opposite to each other. It is possible to excavate while turning around the center between both single-section shield excavators.

In the case where the first and second two single-section shield tunneling machines can be separated from each other, it is possible to branch from two horizontal or two vertical shield tunnels to two single-section shield tunnels. In addition, the two single-section shield tunnels can be joined again.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1, a double shield excavator 1 is composed of two first and second circular single-section shield excavators 2 and 3 of the same size arranged in parallel. The first single-section shield excavator 2 has a front trunk 2a and a rear trunk 2b separated from each other, whereas the second single-section shield excavator 3 is integrated. Each of these single-section shield excavators 2 and 3 has a cutter 4 mounted on the front surface thereof, and a propulsion mechanism such as a known cutter driving mechanism and a propulsion jack, a muddy water or mud pressurizing mechanism, a soil discharging mechanism, and the like. The structure is such that each shield tunnel with a single circular section can be constructed independently.

[0011] Front body 2 of first single-section shield machine 2
a can be bent with respect to the rear trunk portion 2b by a known folding mechanism as shown in FIGS. Also, the first
The single-section shield machine 2 and the second single-section shield machine 3 are connected by a connecting pin 5 as shown in FIGS. 4 and 5, and the connecting pin 5 is used as a fulcrum as shown in FIGS. Can be relatively rotated. As shown in FIGS. 8 and 9, one of the shield excavators 2 and 3 has a guide pin 6 on one side and a guide pin 6 on the other side for guiding the rotation and adjusting the angle to a desired angle. A guide groove 7 that is movably fitted is provided. Since the connecting pin 5 can be removed, the two single-section shield excavators 2 and 3 can be separated.

The tail section of each of the single-section shield excavators 2 and 3 has a segment assembling work portion as in a normal single-section shield excavator. The segments can be independently assembled in a circular shape without being affected by the other single-section shield machine. Since the assembly is a circular cross section for both single section shield machine 2 and 3,
Even if the double shield excavator 1 turns as described later, it can be performed in the same manner as in the related art using the erector device without changing the setup.

The double shield excavator 1 moves straight when the single-section shield excavators 2 and 3 are propelled in parallel as shown in FIG. 1, and moves horizontally as shown in FIG. 10 or shown in FIG. 11. Such a two-parallel parallel double shield tunnel can be constructed. In this case, the segment to be used can be handled only by the conventional straight segment. After assembling the segments into circular single sections in each of the single-section shield excavators 2 and 3 and extruding them out of the machine from the rear end, a gap is formed between the two extruded circular single-section segments 8. Therefore, openings 9 are provided in the skin plates at the tail portions of the shield excavators 2 and 3 as shown in FIG. 12, and the elastic members 10 shown in FIGS. At the same time as the extrusion, the elastic member 10 is arranged between the two circular single-section segments 8. The elastic material 10 supports the horizontal force and the vertical force of the assembled segments, stabilizes the lining, and prevents stress concentration on each lining between the two circular single-section segments 8.

As shown in FIGS. 2 and 3, the rear body portion 2b of the first single-section shield excavator 2 and the second single-section shield excavator 3 are made parallel to each other to form a first single-section shield excavator. 2
13 is propelled by bending the front trunk portion 2a at a desired angle θ by the center bending mechanism, as shown in FIG. A force is generated to turn the first single-section shield excavator 2 around the single-section shield excavator 3, and the second single-section shield excavator 3 travels substantially straight, whereas the first single-section shield excavator 3 advances. Machine 2 excavates while turning. Therefore, the second
The double shield tunnel in which the tunnel formed by the first single-section shield excavator 2 spirals around the tunnel formed by the single-section shield excavator 3 is constructed. In this case, the first
The conventional single-section shield machine 3 is used for the tunnel by the single-section shield machine 2
Can be handled by the conventional straight segment.

As shown in FIGS. 6 and 7, when the first and second single-section shield excavators 2 and 3 are inclined to each other at a desired angle with the connecting pin 5 as a fulcrum, the two single-section shield excavators as shown in FIG. A force is generated to turn the two single-section shield excavators 2 and 3 around the center between the shield excavators 2 and 3, and the two single-section shield excavators 2 and 3 excavate while turning together to form two spirals. A tunnel will be constructed. In this case, both the tunnel formed by the first single-section shield excavator 2 and the tunnel formed by the second single-section shield excavator 3 can be coped with conventional tapered segments.

Front trunk 2 of first single-section shield machine 2
If a is bent with respect to the rear trunk portion 2b, and the shield excavators 2 and 3 are tilted with respect to each other with the connecting pin 5 as a fulcrum, a more complicated tunnel shape can be obtained. or,
Remove the connecting pin 5 and shield shield machines 2 and 3
If the single-section shield excavators 2 and 3 are separately excavated, two circular single-section shield tunnels can be branched from two horizontal or two vertical shield tunnels to perform continuous construction.

In the above example, the two single-section shield excavators 2 and 3 have the same size, but may have different sizes.
For example, as shown in FIG. 15, if the first single-section shield excavator 2 is smaller than the second single-section shield excavator 3, the small shield tunnel is parallel or spiral along the large shield tunnel. A double shield tunnel can be constructed, which is convenient when two underground roads and sewage pipes of different sizes are constructed simultaneously. Further, the single-section shield excavators 2 and 3 are not limited to a circular shape but may be an elliptical shape or a rectangular shape.

[0018]

According to the present invention, the following effects can be obtained. (1) Two single-section shield excavators are joined in parallel, and only one of the single-section shield excavators has a structure in which the front torso is bent with respect to the rear torso. Compared with a double shield excavator, it has a simple structure and is easy to manufacture, and also has easy excavation direction control. (2) Since both single-section shield excavators have independent single sections, they are advantageous in terms of stress against external force, and can reduce the stiffening ribs of the skin plate and reduce the thickness of the skin plate. be able to. Therefore, manufacturing costs can be reduced. (3) Since the lining is formed by simply joining two single-section lining parts that are independent and separated from each other in a series, the conventional ordinary segment can be used as it is, and it is not necessary to use a deformed segment. The segment cost and the construction cost can be reduced as compared with the conventional case. (4) The straight line of the double shield tunnel, one straight
The other can be freely swiveling.

(5) Since two single-section shield excavators are pin-joined so as to be relatively rotatable, a more complicated linear double shield tunnel can be constructed. (6) By making it possible to separate two single-section shield tunneling machines, it is possible to diverge from two horizontal or two vertical shield tunnels to two single-section shield tunnels. The cross-section shield tunnel can also rejoin.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing a state in which a front trunk portion of one single-section shield excavator of the double shield excavator is bent.

FIG. 3 is a side view of the same.

FIG. 4 is a schematic front view showing a connection configuration of both single-section shield excavators.

FIG. 5 is a plan view of the same.

FIG. 6 is a perspective view showing a state where both single-section shield excavators are inclined with respect to each other.

FIG. 7 is a side view of the same.

FIG. 8 is a schematic side view showing a configuration for guiding rotation between the two single-section shield excavators.

FIG. 9 is a schematic side view of the same operating state.

FIG. 10 is a cross-sectional view of a horizontal double shield tunnel constructed by the double shield machine.

FIG. 11 is a sectional view of the vertical double shield tunnel.

FIG. 12 is a perspective view showing a configuration of a tail portion of the twin shield machine.

FIG. 13 is an explanatory diagram of a turning operation of the double shield excavator.

FIG. 14 is an explanatory view of the turning operation.

FIG. 15 is a schematic plan view of another example of the double shield machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Double shield excavator 2 1st single section shield excavator 3 2nd single section shield excavator 2a Front trunk 2b Rear trunk

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 000228811 Japan Civic Consultant Co., Ltd. 2-26-2 Nishi-Nippori, Arakawa-ku, Tokyo (73) Patent holder 000140982 Ma-gumi Co., Ltd. 2-5-Kitaoyama, Minato-ku, Tokyo No. 8 (72) Inventor Hideki Hagiwara 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Corporation (72) Inventor Hitoshi Ozaki 2-26, Fujimi 2-chome, Chiyoda-ku, Tokyo Maeda Corporation ( 72) Inventor Minoru Nakamura 2-3-6 Otemachi, Chiyoda-ku, Tokyo Nippon Steel Corporation (72) Inventor Takashi Noguchi 3-1-1 Higashikawasakicho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries, Ltd. (72) Inventor Toshinori Toyoda 2-6-1 Otemachi, Chiyoda-ku, Tokyo Japan Shield Engineering Co., Ltd. (72) Invention Tetsushi Sonoda 2-58-8 Kita-Aoyama, Minato-ku, Tokyo, Japan (72) Inventor Akio Fujimoto 2-58-8 Kita-Aoyama, Minato-ku, Tokyo Japan, Japan (56) References JP-A-3-13694 (JP, A) JP-A-1-278696 (JP, A) JP-A-4-143398 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E21D 9/08 E21D 9 / 06 301

Claims (2)

(57) [Claims] A first single-section shield excavator whose front body is bendable with respect to a rear body, and a second single-section shield excavator whose front and rear portions are integral with each other, and are relatively rotated. A double shield excavator characterized by being pin-joined as much as possible. 2. The double shield excavator according to claim 1, wherein the first single-section shield excavator and the second single-section shield excavator are pin-separated so as to be separable.