JPH0593498A - Three-throw shield excavator - Google Patents

Abstract

(57) [Abstract] [Purpose] As a triple shield excavator that can change the tunnel cross-section into three horizontal and three vertical, there are no technical difficulties.
In addition to being able to form a continuous structure, the manufacturing cost can be reduced even with three units, stress is also advantageous, and lining can be performed only with normal segments. [Structure] Integrated single-section shield machine 2 with front and rear parts integrated
And a bending type single-section shield machine 3 or 4 capable of bending the front body parts 3a and 3a with respect to the rear body parts 3b and 4b, a combination of one integrated type and two bending type It is made up of a combination of two body types and two bending types, which are joined together in parallel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a triple shield machine for constructing a triple shield tunnel having three 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. 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. If a triple structure is used, the above-mentioned problems become more prominent and technically difficult.

An object of the present invention is to solve the above problems and to provide a triple shield excavator capable of changing the tunnel cross-sectional shape into a horizontal triple station and a vertical triple station, which has no technical difficulty. In addition, it is possible to reduce the manufacturing cost even with three stations, and it is advantageous in terms of stress, and the lining can be handled only by the normal segment.

[0005]

SUMMARY OF THE INVENTION A triple shield excavator according to the present invention is a single-section single-section shield excavator in which front and rear portions are integrated, and a bendable single-section in which a front body portion is bendable with respect to a rear body portion. The shield machine is a combination of one integrated type and two bending type machines, or a combination of two integrated type machines and one bending type machine, which are joined in parallel with each other.

Of the three single-section shield machines, at least two of them can be pin-joined together or separably joined together. Further, at least one of the three single-section shield machines may be different in size from other single-section shield machines.

[0007]

The operation of the triple shield machine of the present invention is basically 3
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. Further, the lining has a form in which three single-section lining portions which are independent of each other and are separated from each other are simply joined in triplicate. The three single-section shield excavators have a structure that combines an integrated single-section shield excavator with an integrated front and rear part and a bendable single-section shield excavator in which the front body is bendable with respect to the rear body. Because there is
By bending the front body of the bending type single-section shield machine to an arbitrary angle, it is possible to construct a triple shield tunnel with various twisting forms.

When the three single-section shield machines are pin-bonded to each other, they can be tilted with respect to each other, so that the tunnel alignment can be changed more freely.

When the three single-section shield excavators can be separated, three horizontal shield tunnels or three vertical shield tunnels are converted into three single-section shield tunnels or two horizontal shield tunnels.
It is possible to branch into a single or two single-section shield tunnels in series or in vertical two, and join them again.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 1, a triple shield excavator 1 is composed of parallel shield excavators 2, 3, and 4 having the same size, that is, first, second, and third machines having the same size. While the first single-section shield machine 2 in the center is an integrated front and rear part,
The second and third single-section shield machines 3 and 4 on both sides are
The front torso portions 3a and 4a are separated from the rear torso portions 3b and 4b, respectively, and the front torso portion can be individually bent with respect to the rear torso portion by a known center folding mechanism as shown in FIGS. it can. Each of these single-section shield machines 2, 3 and 4 has a cutter 5 mounted on the front surface thereof, and has a known cutter driving mechanism, a propulsion mechanism such as a propulsion jack, a mud pressure or a mud pressure mechanism, an earth discharging mechanism, etc. It is equipped with, and has a structure in which each shield tunnel with a circular single cross section can be installed independently.

Also, three single-section shield machines 2, 3,
4 are connected by a connecting pin 6 as shown in FIGS. 4 and 5, and can be relatively rotated about the connecting pin 6 as a fulcrum as shown in FIGS. 6 and 7. 8 and 9 for guiding the rotation and adjusting to a desired angle.
As shown in FIG. 5, one of the two adjacent single-section shield machines has a guide pin 7, and the other has a guide groove 8 slidably fitted to the guide pin 7. Since the connecting pin 6 can be removed, the three single-section shield excavators 2, 3, 4 can be separated.

The tail portion of each single-section shield excavator 2, 3 and 4 has a segment assembling work portion similar to a normal single-shield excavator. Known techniques allow the segments to be independently assembled into a circle without being affected by other single-section shield machines. Since all the three machines have a circular cross section, even if the triple shield machine 1 turns as will be described later, the assembly can be performed in the same manner as in the past using the erector device without changing the setup.

This triple shield excavator 1 goes straight when three single-section shield excavators 2, 3 and 4 are propelled in parallel as shown in FIG. It is possible to construct a vertical parallel triple shield tunnel as shown in FIG. In this case, the conventional straight segment can be used as the segment to be used. After assembling the segments in each shield machine 2, 3, 4 into a circular single section, and then extruding from the rear end to the outside of the machine, a gap is created between the three extruded circular single section segments 9. Therefore, as shown in FIG. 12, openings 10 are provided in the skin plates of the tails of the three single-section shield machines 2, 3, and 4, and the elastic members 1 shown in FIGS. 9 and 10 are provided in the openings 10.
When 1 is set and the segment is extruded, the elastic material 11 is arranged between the three circular single cross-section segments 9. The elastic member 11 supports the horizontal force and the vertical force of the assembled segment, stabilizes the lining, and prevents stress concentration on each lining body between the three circular single-section segments 9.

As shown in FIGS. 2 and 3, the front body portion 3a of the second single-section shield machine 3 and the front body portion 4b of the third single-section shield machine 4 on both sides are center-folded. When propelled by bending at the same angle (θ1 = θ2) in opposite directions due to the difference between the directions of the propulsive forces of the single-section shield excavators 3 and 4 on both sides, as shown in FIG. A force for turning the second single-section shield machine 3 and the third single-section shield machine 4 about the center point O of the single-section shield machine 2 is generated, and the first single-section shield machine 2 is generated. Moves substantially straight, while the second single-section shield machine 3 and the third single-section shield machine 4 dig while turning in the same direction. Therefore, a triple spiral shield tunnel in which a tunnel formed by the second single-section shield machine 3 and a tunnel formed by the third single-section shield machine 4 draw a spiral around the tunnel formed by the first single-section shield machine 2 It will be constructed. In this case, the conventional taper segment can be used for the tunnels formed by the second and third single-section shield machines 3 and 4, and the conventional straight segment can be used for the tunnel formed by the first single-section shield machine 2.

As shown in FIGS. 6 and 7, without bending the front body portions 3a and 4a of the single-section shield excavators 3 and 4 on both sides, the single-section shield excavators 3 and 4 are connected to the first single-section shield excavators 3 and 4, respectively. When the cross-section shield machine 2 is tilted in the opposite directions at the same angle (θ1 = θ2) with the connecting pin 6 as a fulcrum,
Similar to the case of 3, the first single-section shield excavator 2 goes straight ahead and at the same time, the single-section shield excavators 3 and 4 on both sides turn around to proceed. Above angles θ1 and θ2
When θ1> θ2, as shown in FIG. 14, the three single-section shield excavators 2, 3 and 4 are connected to the first single-section shield excavator 2 and the third single-section shield excavator 4 as shown in FIG. It makes a large turn around a point O between the point and the center of rotation.

All or a part of the three single-section shield excavators 2, 3 and 4 are tilted with respect to each other with the connecting pin 6 as a fulcrum, and further front body portions 3a of the second and third shield excavators 3 and 4 are provided. If both or one of them is bent, the turning force is increased, so that the twist of the tunnel line can be made to have a sharp curvature, and various tunnel lines can be made. Moreover, if the connecting pin 6 is removed and all or a part of the three single-section shield excavators 2, 3, 4 are separated and three or more machines are separately excavated or two and one machines are excavated, the horizontal 3 Straight or vertical 3
From a series of shield tunnels, three circular single-section shield tunnels, or two horizontal or vertical double shield tunnels and one circular single-section shield tunnel can be branched and continuously constructed.

In the above example, one of the three single-section shield excavators 2, 3 and 4 is the integrated type and the two machines on both sides are the bent type. The machine may be a combination of bending type. Further, although the three single-section shield machines 2, 3 and 4 have the same size, they may have different sizes. For example, as shown in FIG. 15, if the second and third single-section shield machines 3 and 4 are made smaller than the first single-section shield machine 2, two large shield tunnels are provided for each large shield tunnel. It is possible to construct a triple shield tunnel in which the small shield tunnels are parallel or spiral, and this is convenient when constructing three underground roads and sewer pipes of different sizes at the same time. Further, the single-section shield machine 2, 3, 4 is not limited to a circular shape, but may be an elliptical shape or a rectangular shape.

[0018]

The present invention has the following effects. (1) Since the structure is a combination of an integrated single-section shield machine with front and rear parts integrated and a bent single-section shield machine with the front body part bendable to the rear body part A structure with no technical difficulties can be achieved as a triple shield excavator that can be converted into horizontal triples and vertical triples. (2) In addition to being a simple structure and easy to manufacture as a triple shield machine, it is also easy to control the direction of excavation. (3) Since each single-section shield machine has single-sections independent of each other, it is advantageous in terms of stress against external force, and it is possible to reduce the stiffening ribs of the skin plate and reduce the skin plate thickness. be able to. Therefore, the manufacturing cost can be reduced. (4) Since the lining has a form in which three single-section linings that are independent of each other and are separated from each other are simply joined in a series, the conventional ordinary segment can be used as it is, and it is not necessary to use a deformed segment. Segment cost and construction cost can be reduced. (5) It is possible to construct triple shield tunnels with various twisting forms.

(6) By connecting the single-section shield machines with pins, a more complicated linear triple shield tunnel can be constructed. (7) By making it possible to separate single-section shield excavators from each other, three-section horizontal or vertical three-section shield tunnels to three single-section shield tunnels, or two horizontal or two vertical rows and one It can be branched into a single-section shield tunnel and can be merged again. (8) By changing the size of the single-section shield machine, it is possible to construct a triple shield tunnel in which the small shield tunnel is parallel or spiral with the large shield tunnel.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a state in which front body portions of single-section shield machines on both sides of the triple shield machine are bent in mutually opposite directions.

FIG. 3 is a side view of the above.

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

FIG. 5 is a plan view of the same.

FIG. 6 is a perspective view showing a state in which the single-section shield machine on both sides is tilted with respect to the middle single-section shield machine.

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 triple shield tunnel constructed by the triple shield excavator.

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

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

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

FIG. 14 is an operation explanatory diagram of another state.

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

[Explanation of symbols]

 1 3-strip shield machine 2 1st single-section shield machine 3 2nd single-section shield machine 4 3rd single-section shield machine 3a Front body section 3b Rear body section 4a Front body section 4b Rear body section

 ─────────────────────────────────────────────────── ─── 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 (5)

[Claims] 1. A single-section shield excavator having front and rear portions integrated with each other, and two single-section shield excavators having front body portions that can be bent relative to a rear body portion, joined in parallel to each other. A triple shield excavator characterized by. 2. A single-section shield machine having two single-section shield excavators having front and rear portions integrated with each other, and a single-section shield machine having a front body which is bendable with respect to a rear body, joined in parallel with each other. A triple shield excavator characterized by. 3. The triple shield excavator according to claim 1, wherein at least two of the three single-section shield excavators are pin-joined to each other. 4. The triple shield excavator according to claim 1, wherein at least two of the three single-section shield excavators are detachably joined to each other. 5. The size of at least one of the three single-section shield excavators is different from that of the other single-section shield excavators. Triple shield machine as described in.