JPH0593495A - Three-throw shield excavator - Google Patents

Abstract

PURPOSE:To permit the use of usual segments even for lining work by using a three-throw shield excavator capable of altering a lateral three-throw structure to a vertical three-throw structure which has effectively stress advantage and can also be obtained at low cost. CONSTITUTION:Three shield excavators 2, 3, and 4 whose front bodies 2a, 3a, and 4a can be bent to the rear bodies 2b, 3b, and 4b are connected in parallel. At least two of the three excavators can be pin-connected to each other.

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.

The object of the present invention is to solve the above problems and to change the tunnel cross-sectional shape into three horizontal and three vertical columns.
As a continuous shield machine, it is possible to have a triple structure with no technical difficulties, and even with triple, the manufacturing cost can be reduced, it is also advantageous in terms of stress, and the lining can be handled only with ordinary segments. Is to

[0005]

A triple shield excavator according to the present invention comprises three single-section shield excavators, each of which has a front body portion that can be bent with respect to a rear body portion, and 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. Since the three single-section shield excavators have a structure in which the front torso portion is individually bent with respect to the rear torso portion, by twisting the front torso portion by appropriately selecting the three torso machines, It is possible to construct triple shield tunnels with various shapes.

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. Each single-section shield machine 2, 3, 4 has a front body 2a, 3a,
4a and rear body parts 2b, 3b, 4b are separated, and the front body part is
The back trunk can be individually bent by a known center folding mechanism as shown in FIGS. These single-section shield machines 2, 3 and 4 are each equipped with a cutter 5 on the front side.
It is equipped with a well-known cutter drive mechanism, propulsion mechanism such as propulsion jack, mud pressure or mud pressure mechanism, earth removal mechanism, etc., and it is possible to construct a shield tunnel of circular single section independently. It is structured.

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 11 shown in FIGS. 10 and 11 are provided in the openings 10. At the same time as setting and extruding the segment, the elastic material 11 is arranged between the three circular single-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 second center
For the single-section shield machine 3 of No. 3, the front body section 3a is straightened without being bent with respect to the rear body section 3b, and the front body section 2a of the first single-section shield machine 2 and the third single-section shield machine When the front body portion 4b of the machine 4 is bent by the center bending mechanism in opposite directions at the same angle (θ1 = θ2) and propelled, the directions of the propulsive forces of the single-section shield excavators 2 and 4 on both sides. The force for turning the first single-section shield machine 2 and the third single-section shield machine 4 about the center point O of the second single-section shield machine 3 as shown in FIG. Occurs, the second single-section shield machine 3 travels substantially straight, while the first single-section shield machine 2 and the third single-section shield machine 4 dig while turning in the same direction. Therefore, a triple spiral shield tunnel in which the tunnel formed by the first single-section shield machine 2 and the tunnel formed by the third single-section shield machine 4 form a spiral around the tunnel formed by the second single-section shield machine 3 is formed. It will be constructed. In this case, the conventional taper segment can be used for the tunnels using the first and third single-section shield machines 2 and 4, and the conventional straight segment can be used for the tunnels using the second single-section shield machine 3.

As shown in FIG. 14, when the front body portions 2a, 3a, 4a of the three single-section shield machines 2, 3, 4 are bent in the same direction and at the same angle, in the case of horizontal triple stations, the whole Excavates while curving downwards or upwards, and in the case of three vertical columns, excavates curving leftward or rightward. Therefore, in the case of three horizontal stations, vertical curve construction is performed, and in the case of three vertical stations, horizontal curve construction is performed, and in both cases, curved construction can be easily performed.
If the bending angles of the three single-section shield machines 2, 3, 4 are increased in the order of 4, 3, 2 for example, a tunnel line shape as shown in FIG. 15 is also possible.

As shown in FIGS. 6 and 7, the front body portions 2a, 3a, 4a of the three single-section shield excavators 2, 3, 4 are not bent, and the first and third single-section shield excavators are not bent. Machines 2 and 4 with respect to the second single-section shield machine 3 with connecting pins 6 as fulcrums in opposite directions at the same angle (θ1 = θ2)
When tilted, a turning force with the center point O of the second single-section shield machine 3 as a rotation center is generated in the first and third single-section shield machines 2 and 4 as in the case shown in FIG. Then
At the same time when the second single-section shield excavator 3 goes straight ahead, the single-section shield excavators 2 and 4 on both sides turn around the second single-section shield excavator 3 while advancing. Therefore, a triple shield tunnel consisting of a straight tunnel and two spiral tunnels around it is constructed. In this case, a conventional straight segment can be used for the straight tunnel, and a conventional tapered segment can be used for the spiral tunnel. When the angles θ1 and θ2 are set to θ1> θ2, three single-section shield excavators 2, 3 and 4 are connected to the second single-section shield excavators 3 and 3 as shown in FIG.
It makes a large turn about a point O between the single cross-section shield machine 4 and the center of rotation.

All or part of the three single-section shield excavators 2, 3, 4 are tilted with respect to each other with the connecting pin 6 as a fulcrum, and further all or part of the front body parts 2a, 3a, 4a thereof are When bent, the turning force increases, so that the twist of the tunnel line shape can be made to have a sharp curvature, and also various tunnel line shapes can be formed. 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 Shield tunnels with three or more circular single cross sections from two or three vertical shield tunnels, or two horizontal tunnels
A continuous or vertical double shield tunnel and a single circular single-section shield tunnel can be branched and continuously constructed.

In the above example, the three single-section shield machines 2, 3 and 4 have the same size, but they may have different sizes. For example, as shown in FIG. 17, if the first and third single-section shield machines 2 and 4 are made smaller than the second single-section shield machine 3, 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.

[0019]

The present invention has the following effects. (1) Three single-section shield excavators that can be broken in the middle are connected in parallel, so there is no technical difficulty as a triple shield excavator that can change the tunnel cross-section into three horizontal and three vertical tunnels.
It can be a continuous structure. (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 a perspective view of three single-section shield machines with the front body portion bent in the same direction.

FIG. 15 is an explanatory diagram of an operation in the case of the state of FIG.

FIG. 16 is an operation explanatory diagram of another state.

FIG. 17 is a schematic plan view of another example of the triple shield machine.

[Explanation of symbols]

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

 ─────────────────────────────────────────────────── ─── 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 triple shield excavator, comprising three single-section shield excavators, each of which has a front body portion that can be bent with respect to a rear body portion, and are joined in parallel to each other. 2. 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. 3. 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. 4. 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.