JPH10292776A - Shield machine whose posture can be changed and shielding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change the shielding posture by providing shield machines arranged in parallel and integrated with launchers that take a reactive force from an excavation wall in symmetrical positions. SOLUTION: The shield machine 1 is formed by arranging and integrating multiple ordinary shield machines in parallel to a center axis, and each machine is provided with launchers 2 in a manner that allows them to come in/out, and each launcher 2 is arranged in symmetrical positions together with an overbreak cutter 5. When a track portion tunnel and a station portion are to be constructed, after shield machines 1 are arranged horizontally with the launchers 2 and the cutters 5 stored for carrying out boring and tunnel construction. When the machines approach the station portion, if launchers 2 and cutters 5 are pushed out, as each launcher 2 is pushed out in opposite directions, the shield machine 1 take a vertical posture due to a reactive force. And then the launchers 2 and the cutters 5 are stored in the shield machines 1, and a platform is constructed. Thus twist is given to the shield machine 1 effectively, track portion and a station portion with a narrow land can be constructed without constructing a shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield excavator capable of changing a digging posture and a digging method.

[0002]

2. Description of the Related Art A shield machine having two shield machines in parallel with a central axis has been developed. It is desirable that the shield excavator having such a shape excavate in a horizontal position on a route portion to perform excavation with a shallow earth covering, and to excavate in a station portion in a vertical position in order to fit in a site. In this case, in the conventional shield excavator, the excavation attitude is controlled and changed by increasing the resistance during excavation by using a device called a stabilizer, which pushes out a plate plate with a hydraulic jack.

[0003]

However, in the above-mentioned conventional apparatus, it is impossible to excavate while the stabilizer is pressed, and a large force for giving a twist to the excavator was not obtained.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is intended to change the excavation posture in which the excavation posture can be continued by applying pressure to the wall around the tunnel and giving a twist to the excavator. It is an object of the present invention to provide a possible shield excavator and its excavation method.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a shield excavator of the present invention capable of changing the excavation posture is provided by integrating a plurality of shield excavators in a direction parallel to a central axis. Each shield excavator is equipped with a propulsion device, a segment assembling device, etc., and each shield excavator is equipped with an extruded body that takes a reaction force from the excavation wall, and the extruded body of one shield excavator is mounted on the other, The present invention is characterized by a shield excavator whose excavation posture can be changed and which is arranged symmetrically with respect to the extruded body of the shield excavator.

Further, in the excavating method for a shield excavator according to the present invention, a plurality of shield excavators are arranged in parallel in a direction parallel to a central axis and integrated, and a propulsion device, a segment assembling device, etc. are installed in each shield excavator. On the shield machine,
Equipped with an extruded body that takes a reaction force from the excavation wall, the extruded body of one shield excavator is arranged in a symmetrical position with the extruded body of the other shield excavator, and shield excavators are placed in front of each extruded body Using a shield excavator constructed by installing an extra excavator that can enter and exit freely, excavating with a shield excavator in a horizontal position in the track section, and gradually extruding the excavated body in the section rubbed to the station It excavates while giving a twist to the excavator while pushing it out of the outer shell of the excavator, and excavating with a shield excavator with a vertical attitude at the station, featuring a shield excavation method that can change the excavation attitude. is there.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a shield excavator capable of changing the excavation posture and an excavation method according to the present invention will be described below with reference to the drawings.

<A> Shape of shield machine The shield machine 1 of the present invention employs a structure in which a plurality of (two in the embodiment) normal shield machines are arranged and integrated in a direction parallel to the central axis. Since each shield excavator 1 is a normal excavator, an excavation blade 3 is installed on the front surface thereof, and a propulsion device centering on a propulsion jack, a device for assembling segments, and the like are installed inside the excavation blade 3. Since the two excavators 1 are arranged side by side, the excavating blades 3 are arranged so as to be shifted back and forth so as not to hinder the rotation of the excavating blades 3. The excavating blade 3 of the excavator 1 is provided with a copy cutter 7 for excavating the front surface.

<B> Extruded body. Each shield machine 1 is provided with an extruded body 2 capable of moving in and out of the outer shell of the machine 1 and extruding from the center in the circumferential direction. The extruded body 2 is a substantially hexahedral block, and only the extruded surface is formed in an arc shape having the same curvature as the outer shell. When the extruded body 2 is extruded, a reaction force is taken from the tunnel wall surface immediately after the excavation, and a rotational force in the opposite direction can be given to the shield machine 1.

<C> Arrangement of the extruded body 2 The extruded body 2 is not installed at an arbitrary position, and the extruded body 2 of one shield excavator 1 is arranged at a position symmetrical to the extruded body 2 of the other shield excavator 1. Therefore, if the extruding bodies 2 on both sides are extruded, the shield machine 1 can be given a rotational force in the direction opposite to the extruding direction.

<D> Excavation cutter. In front of each extruded body 2, there is further provided an overcut cutter 5 which can freely enter and exit from the outer shell of the shield machine 1. The overcutting cutter 5 can adopt, for example, a structure in which a part of the excavating disk is exposed from the outer shell. Extruded body 2
Is located at the mark of the excavation by the excavation cutter 5, so that it is possible to keep the exposed state even during the excavation and press the wall surface to continue the forward movement.

[0012]

[Construction method] Next, a description will be given of an example of excavation of a tunnel and a station on a route using the shield machine 1.

<A> Excavation of the route. Excavation is performed with the shield excavator 1 placed horizontally.
On the rear side, segment 4 is assembled to construct a tunnel. At this time, the excavation of the tip is performed by the excavating blade 3 on the front surface of the excavator 1, and the extruded body 2 and the extra excavator 5 are stored inside the shield excavator 1.

<B> Excavation of the approach position to the station. When the distance to the station portion is approaching, the copy cutter 7 is protruded from the excavating blade 3 on the front surface of the excavator 1 and extra dug 6 is performed. At the same time, the extruded body 2 and the excavation cutter 5 are sequentially pushed outward from the outer shell in parallel with this. Since the two extruded bodies 2 are extruded in opposite directions, the shield excavator 1 which has been in a horizontal posture receives one of the reaction forces, and one of the excavators gradually descends and the other begins to ascend. Since the extruded body 2 is configured to press the ground at a position where the excavation is completed by the excavation cutter 5 located at the front part thereof, the extruded body 2 can continue to extrude even while the shield excavator 1 is excavating.
Excavated traces are filled by injecting mortar or the like from the inside of the shield machine 1.

<C> Excavation at the station. The shield machine 1 having been in the horizontal posture gradually rises, and eventually becomes the vertical posture. Extruded body 2
Since the reaction force obtained by the above is unnecessary, it is stored in the outer shell of the shield machine 1 together with the surplus cutter 5. The construction of the platform 8 in the station section as shown in FIG. 3, the communication path 9 to the ground, and the like are performed by a known method.

[0016]

As described above, the shield excavator 1 and the excavation method of the present invention capable of changing the excavation posture have the following effects. <B> The railway section and the station section can be constructed by a series of operations of the shield machine 1 without constructing the shaft. <B> Stations can be built on narrow land, which is economical. <C> Since the extruded body 2 presses the ground at the excavation site of the extra excavation cutter 5 disposed at the front part thereof, the extruded body 2 can continue the pressurized state even during the excavation of the shield excavator 1, The torsion can be given to the body very efficiently.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a shield excavator 1 according to the present invention, which is capable of changing the excavation posture.

FIG. 2 is an explanatory view of an embodiment of a digging method.

FIG. 3 is an explanatory view of the shape of a station.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshio Odaka 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Shigeo Fujii 111-1 Kitahama-cho, Chita-shi, Aichi Prefecture Heavy Industry Co., Ltd. Aichi Factory (72) Inventor Hitoshi Kitayama 11-1 Kitahama-cho, Chita City, Aichi Prefecture Harima Ishikawajima Heavy Industries Co., Ltd. Aichi Factory

Claims (3)

[Claims] 1. A plurality of shield excavators are arranged and integrated in a direction parallel to a central axis, and a propulsion device, a segment assembling device, etc. are installed in each shield excavator, and each shield excavator is provided with a counterpart from an excavation wall surface. A shield excavator with a changeable excavation posture, which is equipped with an extruding body that takes power and the extruded body of one shield excavator is arranged symmetrically to the extruded body of the other shield excavator 2. A plurality of shield excavators are arranged and integrated in a direction parallel to a central axis, and a propulsion device, a segment assembling device, etc. are installed in each shield excavator, and each shield excavator is provided with an anti-drag from an excavation wall surface. Equipped with an extruding body that takes force, the extruded body of one shield excavator is placed symmetrically with the extruded body of the other shield excavator, and in front of each extruded body, it is possible to enter and exit the shield excavator freely. A shield excavator that can be changed in excavation posture and configured with an extra excavator 3. A plurality of shield excavators are arranged and integrated in a direction parallel to the central axis, and a propulsion device and a segment assembling device are installed in each shield excavator. Equipped with an extruding body that takes force, the extruded body of one shield excavator is placed symmetrically with the extruded body of the other shield excavator, and in front of each extruded body, it is possible to enter and exit the shield excavator freely. Using a shield excavator constructed by installing an extra excavator, excavating with a shield excavator in a horizontal position in the track section, and gradually extruding the body from the outer shell of the excavator in the section rubbed to the station A method of excavating a shield that can be changed in excavation posture, excavating while extruding to the outside while twisting the excavator, and excavating at a station using a shield excavator with a vertical posture.