JP2002004758A - Eccentric multi-shaft two-stage shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an eccentric multi-shaft two-stage shield machine which dispenses with a synchronizing means for synchronizing a parent cutter frame with child cutter frames, and achieves improvement in agitation efficiency in a chamber. SOLUTION: The two-stage shield machine 1 is comprised of an eccentric multi-shaft parent shield machine 2 and eccentric multi-shaft child shield machines 3 and 3 housed in the parent machine, and operated by excavating a relatively large-diameter tunnel by the parent shield machine 2 and the child shield machines 3 and 3 combined together in one body, and thereafter starting the child shield machines 3 and 3 to sequentially excavate a relatively small-diameter tunnel. According to the two-stage shield machine 1, openings 11 and 11 are formed in the parent cutter frame 8 of the parent shield machine 2 under condition that the parent cutter frame 8 does not interfere with at least an internal region enclosed by child skin plates 15 of the child shield machines 3 even if the parent cutter frame 8 carries out a small rotation driven by a crank driving mechanism when viewed from the front. Then, the child cutter frames 9 of the child shield machines 3 are arranged in the openings 11 and 11, respectively, in a manner being almost flush with the parent cutter frame 8 without providing the mechanical synchronizing means for synchronizing with the parent cutter frame 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parent-child shield excavator in which an eccentric multi-axis type free-section child shield machine is housed inside an eccentric multi-axis type parent shield machine.

[0002]

2. Description of the Related Art Conventionally, when a subway or the like is constructed by a shield method, a station is first constructed by a digging method, and then a shield machine is started from a starting base constructed at an end of the station to construct a tunnel on a route. Shield excavation was generally performed, but in recent years it has become difficult to adopt the excavation method itself due to overcrowding of cities.
In addition, in the case of the open cut method, large-scale lining is required on the road surface, road traffic restrictions are large, and the work will be performed while suppressing the effect on underground buried objects. Many steps and time were required, and the construction cost was naturally increased.

In recent years, as a solution to such a problem,
A parent-child shield machine is being developed. This parent-child shield machine excavates a relatively large-diameter tunnel and then separates the child shield machine so that a small-diameter tunnel can be continuously excavated. Proposed.

However, as shown in FIG. 7, most of the child shield machines 51 are housed coaxially, that is, at the center position inside a cylindrical parent shield machine 50, and the cutter head of the child shield machine 51 is installed. Since the parent shield cutter head 53 on the outer periphery in engagement with the cutter head 52 of the child shield machine 51 is driven to rotate by rotating the 52 by a driving source such as a hydraulic motor, the station If the tunnel center line of the part does not match the tunnel center line of the route part, it cannot be applied.

Therefore, one of the present applicants is disclosed in
In Japanese Patent Application Publication No. 0-176479, there has been proposed a parent-child shield machine in which a plurality of child shield machines can be arranged at arbitrary positions without having to match the axis of the parent shield machine with the axis of the child shield machine. In this parent-child shield machine, the cutter head for the child shield machine is separated from the child shield machine and provided in the cutter head for the parent shield machine, and when the parent and child are integrated, the cutter head side for the parent shield machine is used to drive the cutter around its central axis. The arrangement and number of the child shields are made arbitrary by being rotated by a drive source such as a motor.

[0006] However, Japanese Patent Application Laid-Open No.
Even in the case of the parent-child shield machine described in Japanese Patent Publication No. 79, since the cutter head for the parent-child shield machine is rotated, the excavation section of the parent-child shield machine is provided with a telescopic copy cutter on the peripheral surface of the parent shield-machine cutter head. Unless provided,
There is a problem that the excavated cross section is substantially limited to a circle.

On the other hand, in recent years, in order to realize an economical tunnel excavation with a small surplus cross section and a demand for streamlining of a station structure, a parent-child shield capable of excavating an arbitrary tunnel cross section such as a rectangle, an ellipse, a horseshoe, and a compound circle has been demanded. Excavators are desired.

Japanese Unexamined Patent Publication Nos. 11-324563 and 20 have disclosed a parent-child shield excavator that meets such demands.
An eccentric multi-axis type parent-child shield machine described in JP-A-00-2077 has been proposed. These eccentric multi-axis type parent-child shield machines accommodate one or more eccentric multi-axis type child shield machines in the eccentric multi-axis type parent shield machine, and integrate the parent shield machine and the child shield machine into an arbitrary cross-sectional shape. This is a parent-child shield excavator in which after excavating a large-diameter tunnel, the child shield machine is started and a small-diameter tunnel having an arbitrary cross-sectional shape can be continuously excavated.

First, the eccentric multi-axis type shield machine will be outlined. This shield machine is disclosed in Japanese Patent Publication No. 3-80240, Japanese Patent Publication No. 7-68868 and Japanese Patent Publication No. 7-68.
870, etc. Specifically, as shown in FIGS. 8 and 9, a cutter frame 54 on which a large number of drill bits 55, 55. Supported by 56, 56 ...
The cutter frame 54 is caused to make a small rotational movement in the same plane by an equilibrium link movement due to the synchronous rotation of each of the cranks 56. As a main feature point, the selection of the shape of the cutter frame 54 enables excavation of an arbitrary cross section substantially similar to the cutter shape. Since the turning radius of the cutter frame 54 is small, the excavation torque is small, and the wear of the bit 55 is reduced, so that excavation over a long distance is possible. Furthermore, since each of the plurality of driving units is compact and can be unitized, assembly, disassembly, and transportation are easy.

The eccentric multi-axial parent-child shield machine described in the above-mentioned Japanese Patent Application Laid-Open No. 11-324563 and Japanese Patent Laid-Open No. 2000-2077 are all provided with an eccentric multi-axial parent shield machine In a parent-child shield machine having a structure in which a child shield machine 61 (corresponding to a branch shield and a second-stage shield machine in the specification) is provided, in order to avoid interference between the parent cutter frame 62 and the child cutter frame 63, a parent cutter is used. A method of synchronizing the crank motion of the frame 62 and the crank motion of the child cutter frame 63 is proposed.

Specifically, the former JP-A-11-32456
In the publication No. 3, as shown in FIG. 10, a synchronous fitting 66 for mechanically connecting the rotation drive unit 64 and the rotation drive unit 65 of the child shield machine 61 to each other inside the parent shield machine 60.
Is used, synchronization control between the parent cutter frame 62 and the child cutter frame 63 is enabled, and when the child shield machine 61 is separated, the synchronization is released by removing the synchronization metal fitting 66 in the parent shield machine 60. .
On the other hand, in the latter JP-A-2000-2077, FIG.
As shown in FIG. 1, a connecting member 67 composed of a hydraulic cylinder is installed in the cutter frame 63 of the child shield machine 61, and the hydraulic cylinder type connecting member 67 is extended and engaged with the cutter frame 62 of the parent shield machine 60. Thus, the parent cutter frame 62 and the child cutter frame 63 are synchronized. When the child shield machine 61 is separated, the engagement is released by contracting the hydraulic cylinder type connecting members 67, 67.

[0012]

However, in the case of the former JP-A-11-324563, the large synchronous fitting 66 is provided adjacent to the bulkhead (partition wall) of the parent shield machine. In addition, the installation space must be secured in the machine, which has a serious effect on other device layouts, and causes a problem that the length of the parent shield machine is lengthened accordingly. Also,
There is also a problem that it takes a lot of time and labor to install and disassemble the synchronous fitting.

On the other hand, the latter Japanese Patent Application Laid-Open No. 2000-2077 is excellent in that the restrictions in the machine are eliminated and that it can be released at once by a hydraulic operation from inside the machine. However, excessive stress concentration is likely to occur at the joint between the hydraulic cylinder type connecting member 67 and the parent cutter frame 62, and it is necessary to install a pressure sensor, a strain sensor, and the like at the joint in advance and closely monitor the stress. Become. Also,
When the hydraulic cylinder type connecting member 67 is in a state where expansion and contraction cannot be controlled due to overload, there is a problem that it is extremely difficult to cope with the situation.

Further, in these conventional examples, when the child shield machine is started, the child cutter machine (the outer shape of which is determined by the diameter of the child skin plate) passes through, so that the parent cutter frame is separated and does not interfere. A lot of time and effort is required for starting preparation, such as having to retract to a position and positioning the parent cutter frame at a predetermined rotational position.

On the other hand, the excavation method of the eccentric multi-axis shield machine is of an earth pressure type or a mud pressure type due to the mechanism of the cutter frame, and the taken-in earth and sand is filled in the chamber to maintain the balance with the amount of earth removed by the screw conveyor. This ensures that the face is stable. For this reason, a stirring blade or the like is provided on the back side of the cutter frame, or an agitator or the like is separately provided.However, it is effective to stir the earth and sand in the chamber in terms of face stability and soil removal efficiency. It would be desirable.

Accordingly, a main object of the present invention is to eliminate the synchronizing means itself in an eccentric multi-shaft parent-child shield excavator, to solve the above-mentioned problems at once, and to improve the stirring efficiency in the chamber. An object of the present invention is to provide an eccentric multi-axis type parent-child shield machine having the additional effect of the above.

[0017]

According to the present invention, there is provided an eccentric multi-axial parent shield machine in which one or a plurality of eccentric multi-axial child shield machines are accommodated, and the parent shield machine and a child shield machine are provided. A parent-child shield excavator that excavates a relatively large-diameter tunnel integrally with a shield machine and then starts the child shield machine to continuously excavate a relatively small-diameter tunnel. In the parent cutter frame of the machine, even when the parent cutter frame is slightly rotated by the crank drive mechanism when viewed from the front, the parent cutter frame is at least an inner region surrounded by the child skin plate of the child shield machine. An opening is formed under conditions that do not invade the child cutter frame of the child shielding machine without providing mechanical synchronization means with the parent cutter frame in this opening. In which characterized in that a beam in substantially the same plane as the parent cutter frame.

In the present invention, in order to eliminate the interference between the parent cutter frame and the child cutter frame, the opening formed in the parent cutter frame is provided with a crank driving mechanism when viewed from the front. Therefore, the parent cutter frame is formed under such a condition that the parent cutter frame does not invade at least the inner area surrounded by the child skin plate of the child shield machine even if it makes a small rotational movement. The child cutter frame is disposed substantially flush with the parent cutter frame within the opening without mechanical synchronization.

Since the excavation area shared by the child cutter frame is an area inside the child skin plate, if the parent cutter frame does not invade this area, the parent cutter frame and the child cutter frame will be different. Since the cutter frames do not interfere with each other (contact / collide) even at the rotation position, there is no need to synchronize, and the child shield machine can start regardless of the position of the parent cutter frame. .

On the other hand, in this eccentric multi-axial parent-child shield machine,
Since the parent cutter frame and the child cutter frame do not interfere at all, the parent cutter frame and the child cutter frame may be rotated while being electrically synchronized, or may be rotated while shifting the phase, The rotation may be performed in the forward and reverse directions while the rotation directions are different. In particular, when the parent cutter frame and the child cutter frame are respectively rotated in the normal and reverse directions, a complicated sediment flow can be generated in the sediment intake chamber, and an improvement in stirring efficiency can be expected. Become.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of the present eccentric multi-axial parent-child shield machine 1, and FIG. 2 is a longitudinal sectional view thereof. For convenience of explanation, the front side indicates the face side, and the rear side indicates the wellhead side.

The eccentric multi-axial parent-child shield machine 1 is arranged inside a horseshoe-shaped parent shield machine 2 in the arrangement shown in FIG. This is a parent-child shield excavator that houses the child shield machines 3 and 3.

Inside the parent skin plate 5, accommodation rings 6, 6 slightly larger in diameter than the child skin plates 15, 15 of the child shield machines 3, 3 are arranged. The child shield machines 3 and 3 are accommodated in the sub-machines. In the cutter frame 8 of the parent shield machine 2, two large openings 11, 11 are formed for the child cutter frames 9, 9 arranged on the same plane, and the excavation surface is formed by the parent cutter frame 8 and the child cutter frame. Excavation is carried out while sharing between 9 and 9.

The parent shield machine 2 will be described in detail below. The parent shield machine 2 is provided with a partition 17 at a front side position of the horseshoe-shaped parent skin plate 5, and is divided into an excavation part and a shield machine space. A horseshoe-shaped parent cutter frame 8 is provided in front of the partition wall 17 with a space corresponding to the sediment intake chamber 18. The parent cutter frame 8 includes:
A large number of bits are provided on the front surface of the frame, and are supported by a plurality of, in the illustrated example, a total of six crank drive units 20 provided on the partition wall 17. The crank drive unit 20 supports the main cutter frame 8 by a cutter support shaft 22 fixed at an eccentric position of the rotary head 21, and is driven by a drive motor 23 fixed to the rear side of the cutter drive unit 20. The rotary head 21 is rotated, and the parent cutter frame 8 makes a small rotation in the same plane with the small rotation of the cutter support shaft 22.

The child cutter frame 9 of the child shield machine 3 is disposed inside the parent cutter frame 8, and the child shield machine 3, 3 can be separated and started after digging together with the parent and child. Openings 11, 11 are formed at the corresponding positions of the child shield machines 3, 3. These openings 1
Reference numerals 1 and 11 denote openings that are sufficient for the child shield machine 3 to pass therethrough. Even if the parent cutter frame 8 makes a small rotational movement in the same plane, the parent cutter frame 8 can be moved by the child skin plates 15 and 15. So that it does not enter the parent excavation area boundary lines 13, 13 surrounding the outside.
That is, when viewed from the front (FIG. 1), the parent cutter frame 8 does not affect at least the inner area of the child skin plates 15, 15, and how the parent cutter frame 8 and the child cutter frames 9, 9 are respectively. The cutter frames do not interfere with each other (contact / collision)
The child shield machines 3 and 3 can be started regardless of the position of the parent cutter frame 8.

On the other hand, inside the parent shield machine 2, two parent screw conveyors 29, 29 are disposed so as to face an opening below the earth and sand intake chamber 18, and when the parent and child are integrated, the parent screw conveyor 29 is provided. Screw conveyor 29,2
9 to discharge excavated earth and sand, and a shield jack 2 around the rear side of the bulkhead 17.
Are provided, and the parent-child shield excavator 1 is propelled while applying a reaction force to the end faces of the segments 16, 16 ... which are sequentially installed along with the shield excavation. The segment 16 is installed by the erector 26 in a ring shape along the circumferential direction every time the excavation proceeds. On the rear side of the erector, two perfect circle holding devices 27, 27 are provided in the illustrated example, and the segments 16, 1 immediately after installation are provided.
6 are kept in a perfect circle state for a certain period of time. On the rear side of the parent shield machine 2, there is a rear bogie 2
8 is provided to supply necessary materials and the like.

On the other hand, the secondary shield machine 3 accommodated in the accommodation ring 6 is provided with a partition wall 30 at a position on the front side of the circular skin plate 15 so as to be divided into an excavated portion and the inside of the shield machine. A circular child cutter frame 9 is provided on the front side of the partition wall 30 so as to leave a space for the earth and sand intake chamber 31. The child cutter frame 9
Are provided with a large number of bits on the front surface of the frame, and are supported by a plurality of, in the illustrated example, three crank drive units 32 provided on the partition wall 30 in the same manner as the parent cutter frame 8. The crank drive unit 32 supports the child cutter frame 9 by a cutter support shaft 34 fixed at an eccentric position of the rotary head 33, and is driven by a drive motor 35 fixed to the back side of the cutter drive unit 32. The rotating head 33 is rotated, and the cutter support shaft 3 is rotated.
The small cutter 4 moves in the same plane as the small cutter 4 moves with the small rotation.

The area excavated by the child cutter frame 9 is substantially a circular area surrounded by the child skin plate 15 and has no interference with the parent cutter frame 8. There is no need to synchronize. As a result, not only the rotary motion can be performed with substantially the same phase, but also the rotary motion can be performed with an arbitrary phase shift. Furthermore, the parent cutter frame 8
May be rotated in a direction opposite to the rotation direction of. When the rotation direction is reversed, the sediment flow in the sediment intake chamber 18 generated by the parent cutter frame 8 collides with the sediment flow generated in the sediment intake chamber 31 generated by the child cutter frame 9. And a complicated flow that promotes agitation is required.
It is possible to expect an improvement in the earth and sand stirring efficiency within 1.

Around the rear side of the partition wall 30, child shield jacks 36, 3 are arranged along the circumferential direction in preparation for future excavation.
6 are provided, and hood ring push-out jacks 37, 37 ... are provided. When the child shield 3 starts moving,
It is a jack for pushing out a child device hood 38 previously accommodated between the child skin plate 15 and the accommodation ring 6 to form a sediment intake chamber having a substantially closed periphery. Further, facilities such as the erector 39 and the child screw conveyor 43 are provided in advance in the child machine shield machine 3.

After excavating a horseshoe-shaped tunnel having a relatively large diameter using the parent-child shield machine 1 described above, the child shield machines 3 and 3 are started in the soil, and subsequently a small-diameter circular tunnel is excavated. The handset starting operation procedure will be described later.

As shown in FIG. 1, in a state where the parent shield machine 2 and the child shield machines 3 and 3 are integrated, a horseshoe-shaped tunnel matching the outer shape of the parent shield machine 2 is dug and the parent shield machine 1 Has reached a predetermined position, as shown in FIG.
, Disassembling the perfect circle holding device 27, dismantling the erector 26, dismantling the rear deck 25, and dismantling the parent screw conveyor 29, etc. It is desirable that the underground starting portion of the child shield machine 3 be solidified in advance by ground improvement.

Next, as shown in FIG. 4, the slave unit hood push-out jacks 37 are extended to push the slave unit hood 38 forward, and the periphery of the slave unit hood 3 is almost completely closed at the front position. The earth and sand intake chamber 31 is formed.

Next, on the child shield machine 3 side, as shown in FIG. 5, a reaction force receiving base 40 is installed to take a reaction force when the child shield machine 3 starts moving, and The segments 41, 41,... In addition, while installing the handset subsequent truck 42,
A conveyor is mounted on the upper part of the subsequent carriage 42 of the slave unit, and the earth and sand discharge facility by the slave screw conveyor 43 is completed.

As described above, when the preparation for starting the child shield machine 3 is completed, as shown in FIG.
The child shield machine 3 is dug while taking the reaction force of the child shield jacks 36, 36,... To construct a relatively small diameter circular tunnel continuous with the horseshoe tunnel.

[0035]

As described in detail above, according to the present invention, the parent shield machine and the child shield machine are integrated to dig a relatively large diameter tunnel, and then the child shield machine is started and the relatively small diameter tunnel is started. Eccentric multi-axis type parent-child shield excavator that can continuously excavate tunnels, it is difficult to secure the installation space, it takes time and effort to install and dismantle, and in the case of jack type connection, monitoring with sensors is troublesome Further, it is possible to eliminate the synchronization means itself which has a problem that it is extremely difficult to cope with the case where the control becomes impossible. At the same time, there is no interference between the parent cutter frame and the child cutter frame, so that each can be rotated in the forward and reverse directions. In this case, a complicated sediment flow is generated in the chamber, so that an improvement in the stirring efficiency can be expected.

[Brief description of the drawings]

FIG. 1 is a front view of the present eccentric multi-axial parent-child shield machine 1. FIG.

FIG. 2 is a longitudinal sectional view thereof.

FIG. 3 is a diagram (part 1) illustrating a starting procedure of the child shield machine 3.

FIG. 4 is a structural sectional view of a slave unit hood 38;

FIG. 5 is a start procedure diagram (part 2) of the child shield machine 3.

FIG. 6 is a diagram (part 3) illustrating a starting procedure of the child shield machine 3.

FIG. 7 is a front view of a conventional parent-child shield having a circular cross section.

FIG. 8 is a front view of an eccentric multi-axial shield machine having a rectangular cross section.

FIG. 9 is a front view of an eccentric multi-axial shield machine having an elliptical cross section.

FIG. 10 shows a conventional eccentric multi-axis type parent-child shield machine.
(A) is a rear view, and (B) is a longitudinal sectional view.

FIG. 11 is a main part front view showing another conventional eccentric multi-axial parent-child shield machine.

[Explanation of symbols]

1: eccentric multi-axis type parent-child shield machine, 2: parent shield machine, 3
... child shield machine, 5 ... parent skin plate, 6 ... accommodation ring, 8 ... parent cutter frame, 9 ... child cutter frame, 11 ... opening, 13 ... parent excavation area boundary line, 15 ... child skin plate

Continued on the front page (72) Inventor Toshiyuki Muramoto 4-12-20 Nihonbashi Honcho, Chuo-ku, Tokyo Inside Sato Kogyo Co., Ltd. (72) Inventor Junichi Matsui 4-12-20 Nihonbashi Honcho, Chuo-ku, Tokyo Sato Kogyo (72) Inventor Koji Bando 2-4-1, Hamamatsucho, Minato-ku, Tokyo Kawasaki Heavy Industries, Ltd. (72) Inventor Saburo Morio 8, Niijima, Harima-cho, Kako-gun, Hyogo Prefecture Kawasaki Heavy Industries, Ltd. F term (reference) 2D054 AA03 AC01 AD07 BA03

Claims (2)

[Claims] An eccentric multi-axial parent shield machine accommodates one or a plurality of eccentric multi-axial child shield machines in a machine and excavates a relatively large-diameter tunnel integrally with the parent shield machine and the child shield machine. Thereafter, a parent-child shield excavator that is capable of continuously excavating a relatively small-diameter tunnel by starting the child shield machine, in a parent cutter frame of the parent shield machine, in a state viewed from the front, Even if the parent cutter frame makes a small rotation by the crank driving mechanism, the parent cutter frame forms an opening under such a condition that the parent cutter frame does not affect at least the inner area surrounded by the child skin plate of the child shield machine. Without providing mechanical synchronization means with the parent cutter frame in the part, that the child cutter frame of the child shield machine is arranged almost flush with the parent cutter frame. Eccentric multi-axis parent-child shield excavator. 2. The eccentric multi-axial parent-child shield machine according to claim 1, wherein the rotation direction of the parent cutter frame and the rotation direction of the child cutter frame are rotatable in forward and reverse directions, respectively.