JP2915837B2 - Shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield machine. More specifically, the present invention relates to a shield excavator that can simultaneously perform shield excavation and segment assembling, thereby shortening the construction period.

[0002]

2. Description of the Related Art Conventionally, shield tunneling machines have been used for construction of tunnels such as subways, water and sewage systems, electric power, and community trenches. As shown in FIG. 5, for example, this shield machine comprises a shield body (A), a carter face (A), a shield propulsion jack (C), a screw conveyor (D), and the like. The excavation using the drilling machine, and the segment assembling procedure, the reaction force is obtained from the segment (e) assembled at the rear of the shield drilling machine,
By extending the shield propulsion jack (c),
After excavating the shield excavator and excavating for one ring of segment (e), reduce the shield propulsion jack (c) and assemble a new segment (d) behind it. ing.

The segment (e) is assembled one ring at a time, but during this period, no excavation is performed, and the shield propulsion jack (c) holds down the assembled segment (e). After the assembly of all segments (E) is completed, a reaction force is applied to the newly assembled segments,
Extend the shield propulsion jack (c) and excavate the next segment ring.

As described above, in the conventional shield excavator, the excavation operation and the segment assembling operation are alternately performed in time. However, in such conventional shield construction, it has been desired to perform the construction more quickly. This is because the quick construction shortens the construction period,
This is because there are many advantages such as safe construction due to the safety effect of the face.

However, in the conventional shield excavator, the excavation operation and the segment assembling operation have to be performed alternately in time, so that excavation cannot be performed at the time of segment assembling. Naturally, there was a limit to the improvement. The present invention has been made in view of the above circumstances,
It is an object of the present invention to provide a shield excavator capable of continuously excavating by excavating even when assembling a segment, beyond the limit of the conventional technology.

[0006]

According to the present invention, a segment holding jack is provided between a shield propulsion jack and an assembled segment, and an inner wall surface of a shield body is moved by a linear guide. A shield machine having an enabled inner fuselage, wherein the inner fuselage comprises:
The segment holding jack takes the reaction of excavation from the assembled segment, the shield propulsion jack pushes the shield excavator and combines the new segments, and after the propulsion and assembly of the new segment, moves it forward. To provide a shield machine.

The present invention also provides a shield machine in which the shield machine is provided with a shield propulsion jack on the inner body and extends toward the shield face. Further, the present invention also provides a shield machine in which the extension portion of the propulsion jack and the inner body are fixed in the shield machine.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the shield machine according to the present invention, as described above, the inner wall surface of the shield body can be moved between the propulsion jack and the assembled segment by the linear guide . Further, it has an inner body provided with a segment holding jack. This inner body, a combination of Shin contraction action of the two jack shield propulsion jacks and the segment holding jack, performs continuous excavation and segment assembly.

The procedure of simultaneous excavation and segment construction will be described. First, as initial conditions, it is assumed that the segment holding jack is in an extended state and the propulsion jack is in a contracted state. In this state, the shield propulsion jack is extended through the inner fuselage to perform shield excavation while taking the reaction force of propulsion using the segment holding jack. At the same time, the extended holding jack is contracted, and the segment piece is started to be assembled at that location.

Then, the assembled segment pieces are pushed again by the holding jacks and held again. While this propulsion is performed, the work of assembling the segment pieces is sequentially performed, and the entire periphery of the segment is assembled, and the excavation is completed. In this way, segment assembly for one ring and excavation for the next ring are performed. At this time, the propulsion jack is extended by one ring, and the segment holding jack is pushing and holding the assembled segment. Thereafter, the segment holding jack is extended, the propulsion jack is contracted, and the inner body is moved to the face side to return to the initial state.

By repeating the above operations, excavation and segment assembly are simultaneously advanced. Hereinafter, the present invention will be described in more detail with reference to Examples.

[0012]

1 and 2 illustrate a continuous shield machine according to the present invention. In addition, FIG.
It is -A sectional drawing. As illustrated in FIGS. 1 and 2, the shield machine includes a shield propulsion jack (3), and an inner body (7) is provided between the shield propulsion jack (3) and the assembled segment (4). )have.

The inner body (7) is a shield body (5).
The inner body (7) is provided with a segment holding jack (6) behind the inner body (7). The inner fuselage (7) advances inside the shield fuselage (5), and the segment holding jack (6) extends toward the assembled segment (4). Here, the inner body (7) is, for example, a linear guide (8) using a linear motion bearing or the like.
To be able to move back and forth along this .

With respect to jacks such as the shield propulsion jack (3) and the segment holding jack (6), control of pressure, jack speed, stroke, etc. may be performed by electro-hydraulic control. The propulsion jacks (3) and the segment holding jacks (6) may be alternately arranged on the circumference as illustrated in FIG. 2 in consideration of the balance of the applied force. The number and position of the arrangement can be determined according to the construction scale, construction state, and the like.

In the present invention, for example, FIG.
As shown in the example, the shield propulsion jack (3) may be provided at the front portion of the inner body (7) and may be extended toward the shield face (2). Even in such a case, the shield propulsion jack (3) The direction of excavation and assembly of the segments is similar, except that the direction of extension is reversed from that described above.

Furthermore, even when the extension of the shield propulsion jack and the inner body thereof are fixed in another embodiment, the excavation and segment assembling procedures are the same except that the extension direction of the shield propulsion jack is reversed. Becomes Further, the shield cross section in the present invention can be similarly applied to an arbitrary cross section such as a rectangle, an ellipse, a horseshoe, and a compound circle other than a circle.

When performing a curve construction using this shield excavator, the same method as in the conventional method is applied to the left and right shield propulsion jacks of the conventional shield excavator.
What is necessary is just to produce a stroke difference. Further, in the present invention, if necessary, an over cutter, a copy cutter, a center folding jack and the like may be provided.

In any of the above embodiments,
Also, the inner fuselage (7) against the inner wall surface of the shield body (5)
Can be moved by being regulated by the linear guide (8)
And the shield propulsion and segment assembly are continuously performed.
Will be done. FIG. 4 exemplifies a procedure when segment assembly and excavation are simultaneously performed in the shield machine according to the present invention.

FIG. 4 shows the following state. <1> A state in which the segment holding jack (6) has been extended and the shield propulsion jack (3) has contracted, and these states are referred to as initial states. <2> A part of the segment holding jack (3) where a new segment piece is to be assembled is contracted, and a new segment piece (41) is assembled there. The assembled segment pieces are held by corresponding holding jacks (61). On the other hand, at the same time, the shield propulsion jack (3) is extended to perform excavation. This work is continued, and segment assembly and excavation are performed simultaneously. <3> A state in which segment assembly for one ring and excavation for the next ring have been completed. At this time, the shield propulsion jack (3) is in a state of being extended by one ring, and the segment holding jack (6) pushes and holds the assembled segment (4). <4> At the same time as the segment holding jack (6) is extended, the shield propulsion jack (3) is contracted, and the inner body (7) is moved forward along the linear guide (8) to return to the initial state. .

In the present invention, the above operation is repeated, so that the propulsion and the segment assembly can be simultaneously advanced. The shield machine according to the present invention is applicable to both closed and open types.

[0021]

As described in detail above, according to the present invention, shield propulsion and segment assembly can be performed continuously, so that the construction period is shortened, and the downtime of the shield machine is reduced. It is possible to minimize the loosening of the ground, so that safer construction is possible.

[Brief description of the drawings]

FIG. 1 is a plan view showing the present invention.

FIG. 2 is a sectional view showing the present invention.

FIG. 3 is a plan view showing the present invention.

FIG. 4 is a schematic view showing a construction state of the present invention.

FIG. 5 is a plan view showing a conventional shield machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield main body 2 Face 3 Shield propulsion jack 4, 41 segment 5 Shield body 6, 61 Segment holding jack 7 Inner body 8 Linear guide 9 Screw conveyor

Claims (3)

(57) [Claims] Between 1. A shield propulsion jacks and assembly already segment comprises a segment holding jack, a shield excavation proceeds machine having a body inner that is movable with the inner wall surface of the shield body by the linear guide, an inner The fuselage takes the reaction force of propulsion from the assembled segment by the segment holding jack, assembles a new segment while propelling the shield machine by the shield propulsion jack, and moves it forward after the propulsion and assembly of the new segment are completed A shield machine. 2. The shield machine according to claim 1, wherein a shield propulsion jack is provided on the inner body and extends toward the shield face. 3. A shield machine according to claim 1, the shield machine being characterized in that fixed to the extension length portion and the inner body of the shield propulsion jacks.