JPH0593497A - Two-throw shield excavator - Google Patents

Abstract

PURPOSE:To make the manufacture of a two-throw shield excavator easier as well as reduce the cost of manufacture by using a simple structure in which two machines are connected in parallel, one front cylinder is bent to the rear cylinder and advanced while being turned through the other cylinder. CONSTITUTION:Cutters 4 are attached to the frong sides of a shield excavator 2 having a front cylinder 2a and a rear cylinder 2b which are separated from each other, which is integrated with a shield excavator 3, in such a way as to enable both the machines 2 and 3 in a relatively turable manner by the connecting pin. The front cylinder 2a of the excavator 2 is bendably set by a bending mechanism to the rear cylinder 2b. when the front cylinder 2a is bent and advanced, the excavator 2 is advanced through the excavator 3 advancing straight forwards by difference in the excavating directions of the excavators 2 and 3. A two-throw shield tunnel having a spiral form is constructed around the tunnel by the excavator 3 by means of the first excavator 2. In this case, the tunnel can be obtained by using the conventional tapers and the conventional straight segments.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double shield 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 shape of a tunnel from two horizontal columns to two vertical columns or from two vertical columns to two horizontal columns. Things have been proposed. In the shield machine of the specific example of this publication, two front trunks having a D-shaped cross section are individually bendable by a swinging mechanism (center bending mechanism) to a common rear trunk having an eyebrow cross section. It has a structure.

[0003]

Therefore, there are the following problems. The manufacturing cost is high due to the complicated structure in which two front body portions having a D-shaped cross section are joined to one rear body portion having a cocoon-shaped cross section. It is difficult to process the sliding part between the two front body parts. Since the skin plate of the rear body part has a constricted eyebrow cross section in the middle part, it is disadvantageous in terms of stress compared with the circular shape,
It is necessary to increase the thickness of the skin plate. The bending control of the two front body parts is complicated. Since the two tunnel cross sections have a configuration in which two D-shaped cross sections are combined in the opposite direction, the lining also has a special shape, and the use of irregularly shaped segments increases the segment cost and construction cost.

An object of the present invention is to solve the above problems, simplify the shield machine structure as compared with the conventional one, reduce the manufacturing cost, increase the strength against stress, and facilitate the excavation control. The lining is to be able to handle only normal segments.

[0005]

A double shield excavator according to the present invention comprises a first single-section shield excavator whose front body portion is bendable with respect to a rear body portion and a second single-section shield excavator machine whose front and rear portions are integrated. It consists of a single-section shield machine and a parallel machine.

The first single-section shield machine and the second single-section shield machine are pin-joined to each other, and
Can be separably joined. Furthermore, the sizes of the first single-section shield machine and the second single-section shield machine may be different.

[0007]

The function of the double shield machine of the present invention is basically 2
With a structure in which the single-section shield machine of the machine is simply joined in parallel,
Moreover, since these single-section shield machines have single-sections independent of each other, they are advantageous in terms of stress against external force. Therefore, the stiffening ribs of the skin plate can be reduced and the skin plate thickness can be reduced. In addition, the lining has a form in which two circular independent single-section lining portions are simply joined in two. Only one of the single-section shield excavators has a structure in which the front body part bends with respect to the rear body part.Therefore, when propelling by bending this, the other single-section shield excavator turns around. While digging.

When the first and second single-section shield excavators are pin-joined to each other, the directions of these are made opposite to each other to center the center between the two single-section shield excavators. You can dig while turning.

When the first and second two single-section shield excavators can be separated, it is possible to branch from two horizontal or two vertical shield tunnels to two single-section shield tunnels. It is possible to join the two single-section shield tunnels again.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 1, a double shield excavator 1 is composed of two shield excavators 2 and 3 having a circular single cross section and having two first and second machines having the same size and arranged in parallel. In the first single-section shield machine 2, the front body 2a and the rear body 2b are separated, while the second single-section shield machine 3 is integrated. These single-section shield excavators 2 and 3 are each equipped with a cutter 4 on the front surface thereof, and are internally provided with a cutter driving mechanism, a propulsion mechanism such as a propulsion jack, a muddy water pressurizing mechanism, a mud pressurizing mechanism, and an earth discharging mechanism. It is equipped with, and has a structure in which each shield tunnel with a circular single cross section can be installed independently.

The front body portion 2 of the first single-section shield machine 2
The a can be bent with respect to the rear body portion 2b by a known center 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. 6 and 7. Can be rotated relative to. In order to guide the rotation and adjust to a desired angle, as shown in FIGS. 8 and 9, the guide pin 6 is provided on one of the two single-section shield machines 2 and 3, and the guide pin 6 is slid on the other. A guide groove 7 is provided which is movably fitted. Since the connecting pin 5 can be removed, both single-section shield machines 2 and 3 can be separated.

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

This double shield excavator 1 goes straight when both single-section shield excavators 2 and 3 are propelled in parallel as shown in FIG. It is possible to construct such a vertical double parallel shield tunnel. In this case, the conventional straight segment can be used as the segment to be used. After the segments are assembled into a circular single section in each single section shield machine 2 and 3 and then extruded from the rear end to the outside of the machine, a gap is formed between the two extruded circular single section segments 8. Therefore, as shown in FIG. 12, an opening 9 is provided on the skin plate of the tail portion of both single-section shield machines 2 and 3, and the elastic material 10 shown in FIGS. Simultaneously with the extrusion, the elastic material 10 is arranged between the two circular single-section segments 8. The elastic member 10 supports the horizontal force and the vertical force of the assembled segment, 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 trunk portion 2b of the first single-section shield machine 2 and the second single-section shield machine 3 are made parallel to each other, and the first single-section shield machine 2 is formed. Two
When the front body portion 2a of No. 2 is bent and propelled at a desired angle θ by the center folding mechanism, the second trunk excavators 2 and 3 are driven by a different direction as shown in FIG. A force that causes the first single-section shield excavator 2 to turn around the single-section shield excavator 3 is generated, and the second single-section shield excavator 3 travels substantially straight, whereas the first single-section shield excavator 3 advances. Machine 2 digs while turning. Therefore, the second
A double shield tunnel in which the tunnel formed by the first single-section shield machine 2 draws a spiral is constructed around the tunnel formed by the single-section shield machine 3. In this case, the first
For the tunnel by the single-section shield machine 2, the conventional taper segment, the second single-section shield machine 3
The conventional straight segment can be used for the tunnel.

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

The front body portion 2 of the first single-section shield machine 2
A more complicated tunnel line can be formed by bending a with respect to the rear trunk portion 2b and tilting both single-section shield excavators 2 and 3 with the connecting pin 5 as a fulcrum. or,
Remove the connecting pin 5 to remove both single-section shield machines 2, 3
By separating these and excavating these single-section shield excavators 2 and 3 separately, two circular single-section shield tunnels can be branched and continuously constructed from two horizontal or two vertical shield tunnels.

In the above example, the two single-section shield machines 2, 3 have the same size, but they may have different sizes.
For example, as shown in FIG. 15, if the first single-section shield machine 2 is made smaller than the second single-section shield machine 3, the small shield tunnel is parallel or spiral with the large shield tunnel. It is possible to construct a double shield tunnel, which is convenient when constructing two underground roads and sewer pipes of different sizes at the same time. Further, the single-section shield machines 2 and 3 are not limited to circular shapes, but may be elliptical shapes or rectangular shapes.

[0018]

The present invention has the following effects. (1) Two single-section shield machines are joined in parallel, and only one of the single-section shield machines has a structure in which the front body is bent with respect to the rear body. Compared to the double shield machine, the structure is simple and easy to manufacture, and the direction control is also easy. (2) Since both single-section shield machines have single-sections independent of each other, they are advantageous in terms of stress against external force, and the stiffening ribs of the skin plate can be reduced and the skin plate thickness can be reduced. be able to. Therefore, the manufacturing cost can be reduced. (3) Since the lining has a form in which two single-section lining parts that are independent of each other and are separated are simply joined in two, the conventional ordinary segment can be used as it is, and it is not necessary to use a deformed segment. The segment cost and construction cost can be reduced compared to the past. (4) Straight line of two shield tunnels, one straight,
The other can be freely swiveled.

(5) A more complicated linear double shield tunnel can be constructed by pin-joining two single-section shield excavators. (6) By making it possible to separate two single-section shield excavators, it is possible to branch from two horizontal or two vertical shield tunnels to two single-section shield tunnels. It is also possible to rejoin the cross-section shield tunnel. (7) By changing the size of the two single-section shield excavators, it is possible to construct a double shield tunnel in which the small shield tunnel is parallel or spiral to the large shield tunnel.

[Brief description of 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 machine of the double shield machine has been bent.

FIG. 3 is a side view of the above.

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

FIG. 5 is a plan view of the same.

FIG. 6 is a perspective view showing a state in which both single-section shield machines are tilted with respect to each other.

FIG. 7 is a side view of the above.

FIG. 8 is a schematic side view showing a structure for guiding rotation of both single-section shield machines.

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

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

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

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

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

FIG. 14 is an explanatory diagram of a turning operation of the same.

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

[Explanation of symbols]

 1 2 series shield machine 2 1st single section shield machine 3 2nd section shield machine 2a Front body 2b Rear body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 000000974 Kawasaki Heavy Industries, Ltd. 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo (71) Applicant 000228811 Nippon Shield Engineering Co., Ltd. 2-Otemachi, Chiyoda-ku, Tokyo No. 6-2 (71) Applicant 000140982 Mazumagumi Co., Ltd. 2-5-8 Kita-Aoyama, Minato-ku, Tokyo (72) Inventor Hideki Hagihara 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72 ) Inventor Hitoshi Ozaki 2-1026 Fujimi, Chiyoda-ku, Tokyo Maeda Construction Industry Co., Ltd. (72) Minoru Nakamura 2-3-6 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation ( 72) Inventor Takashi Noguchi 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe, Hyogo Prefecture Kawasaki Heavy Industries Ltd. (72) Inventor Toshinori Toyota Tokyo Nihon Shield Engineering Co., Ltd. 2-6-2 Otemachi, Chiyoda-ku (72) Inventor Tetsuji Sonoda 2-5-8 Kita-Aoyama, Minato-ku, Tokyo Intra-company group (72) Inventor Akio Fujimoto Port of Tokyo 2-5-8 Kita-Aoyama, Ward Stock company Inter-company group

Claims (4)

[Claims] 1. A first single-section shield machine having a front body bendable with respect to a rear body and a second single-section shield machine having front and rear portions integrally joined in parallel. A double shield machine. 2. The double shield machine according to claim 1, wherein the first single-section shield machine and the second single-section shield machine are pin-joined to each other. 3. The double shield excavator according to claim 1, wherein the first single-section shield excavator and the second single-section shield excavator are separably joined to each other. 4. The double shield excavation machine according to claim 1, wherein the first single-section shield machine and the second single-section shield machine have different sizes. Machine.