JPS603390A - Shield tunnel drilling apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shield tunnel excavation device, and more particularly to a dual-purpose Seal I tunnel excavation device that can be used for both cat and mountain tunnels.

In general, in the shield tunnel 1 method, the shield body can be advanced by operating a propulsion jack by applying a reaction force to the lining section by segments, but the shield body can be advanced by
In the H tunnel construction method, a propulsive reaction force is applied to the ground surrounding the tunnel.
Since the main body of the shield is divided into multiple parts in the axial direction, H1 Shinkawa jacks are placed between the parts, and these parts are activated in sequence. has been forced.

For this reason, the dual-purpose shield tunnel excavation device is
・In general, the structure is complicated, and the length and handle of the shield body are difficult to use.
It was difficult to propel the device along a defined curved path.

The main objective of the present invention is to reduce the length and volume of the seal 1ζ body, ensure a large propulsion reaction force, and further reduce the propulsion resistance of the device.

According to the present invention, a shield tunnel excavation device includes a shield body including a plurality of jacks connecting an upper portion, a lower portion, and a lower portion, and a cutter head drive mechanism slidably supported on the shield body. , a cutter head that is connected to the cutter head drive mechanism and has a canter and a supporting sea knee on the outer periphery that can be moved in and out by a hydraulic device, and a segment that is extendable and retractable to press the segment against a part of the ground. A segment erector including a gripping arm, a first hydraulic device for relatively moving the canterhead drive mechanism and the shield body in the tunnel ill+ line direction, and the shield body device and the segment erector. a second hydraulic device for relatively moving the shield body in the direction of the tunnel axis;
Divide into two parts below L, and alternately fix these and the cutter hend and segment erector to the ground and apply a propulsive reaction force to them! Since the force is propelled in the direction of the tunnel axis with respect to the other while the force is being moved, it is possible to reduce its length, depth and gorge, and to reduce the propulsion resistance. 4f1. In order to propel the shield body, a linear reaction force is taken to the ground through the shield body fixed to the surrounding ground, and the canter head and segment fixed to the surrounding ground are Through these, Jl! ! Since the plate can absorb the propulsion reaction force, it can provide sufficient thrust to propel the device.

The features of the invention will become clearer from the following description of the illustrated embodiments.

Referring to FIG. 1.2, the shield excavation device 10 includes a shield main body 12, which is disposed between a lower part 14 and a lower part 16, and expands these parts. and a plurality of jacks 18 that are retractably connected. The bottom of the lower part 16 has a recess 1 in its longitudinal front part.
9a (Fig. 2) is formed, and in its rear part there is a slit open at the rear end as shown in Fig. 3).
9b is formed. At the rear of each section 14.16,
A plurality of propulsion jacks 20 for propelling the shield body by taking a reaction force to the assembled segments (not shown)
are arranged respectively, and a spreader 22 is installed at the rear end.
is provided. The illustrated example relates to hot spring treatment in which the device 10 is applied to the tunnel construction method, and the propulsion jack 20 is shown in a retracted position when not in use.

The lower 88th portion 16 of the shield body has a substantially rectangular surrounding portion 24 forming a hollow portion, and the surrounding portion has one end portion of a four-wood hydraulic jack 26 arranged symmetrically so as to surround the hollow portion. is pivoted. A slide portion 28 is slidably disposed in the hollow portion via a slide metal 29, which is moved relative to the shield body by the jack 26, which is a first hydraulic device, as will be described later.

A drive device 30 is disposed within the slide portion, and a spoke-type cutter head 34 is disposed at the end of a drive shaft 32 extending from the drive device. The slide portion 28 and the drive device 30 accommodated therein constitute a cutter head drive mechanism that is movable relative to the shield body in the tunnel iMt+M direction.

The cutter hend 34 is as shown in FIG.

It has a plurality of spokes 36 (six in the illustrated example) and a member 38 that connects them, and two of these spokes have jacks 4o at their ends, which are operated to move in and out from the outer ends of the spokes. A support nut 42 is built in, and the other end of the spoke has a jack 44 and a canter that moves in and out from the outer end of the spoke by the operation of the jack 44.
46 or so is built-in. The canter 46 is in the extended position only when excavating, while the support shoe 42 is in the extended position only when the cutter hent is secured, as will be explained later.

The countertop 34 is not limited to the one shown in Figure/J\, but may have any structure and shape as long as the support shoe 42 and the countertop 46 are arranged at intervals δ on the outer periphery. An indicator 47 for displaying the rotation angle position of the support shoe 42 is provided at the rear end of the drive device 30.

A ring member 48 is fixed to the rear portion of the slide portion 28, and the other end of the jaw 26 is pivotally attached to the ring member 48. The shield body 12, the cutter hand 34, and its drive device 30 can be moved in the axial direction relative to each other by actuation of a jack 26, which is pivotally connected at one end to the lower portion of the shield body and at the other end to the ring member. shall be.

The device 10 also includes a segment erector 50,
The segment erector includes an erector ring 54 connected to ring member 48 via a plurality of jaws 52, which are second hydraulic devices. A segment gripping arm, that is, an erector jack 58 is attached to this erector ring via a flaket 56 constituting a rotating part, and the end of this jack is lowered by y1. A gripper 62 is provided for gripping the segment 60. Due to the operation of the jack 58, the jack 26 advances the shield main body 111] while the segment 60 is suppressed by the ground around the tunnel in the invert section through the pickpocket of the lower part 16 of the shield main body 16 and l-19b. It is possible to cause the segment erector 50 to generate a reaction force to cause this.

The device 10 further includes a perfect circle holding device 64, which is located between an upper member 66 and a door member 68 having arcuate surfaces and both lfb materials as shown in FIG. and a plurality of jacks 70 that are retractably connected.
including. Perfect circle holding device 64 installed between support F1
A plurality of kite halves 2 (four in the illustrated example) are provided to guide the movement of the kite half 2 in the forward direction, that is, in the tunnel excavation direction, and one end of each kite half 2 is fixed to the ring member 48. The perfect circle holding device 64 has both members 66 and 68 in place.
When in this state, it is pulled forward by a plurality of (four in the illustrated example) jaws 74, which are third hydraulic devices. The jack 74 has one end pivoted to a receiving portion 76 provided on each of the members 66 and 68, and the other end pivoted to a receiving portion (not shown) provided on the kite par 72. There is.

The device 10 includes a shearing device 78 at S et al., the front end of which shearing device is located near the force/intermediate end 34 and the rear end of the shearing device 78 is near the round holding device 64, and the entire rearward direction is disposed. It is arranged at an angle.

The device 10 is used for excavation by the forceter hand 34 under the conditions shown in FIG. 1.2, and under the conditions shown in FIG. 6.7.
In the configuration shown in the figure, the shield body 12 is moved to the cutter relative to the dowel 34, segment erector 50, and round retainer 64.

First, the upper portion 14 and the lower portion 16 of the shield body 12
is pressed against the surrounding ground by the operation of the jack 18 and is in a fixed state, and the jack 58 of the segment erector 50 is not pressing the segment 60 into the ground through the When in the fixed position, the cutter head 34 is driven and rotated, and at the same time, the action of the jack 26 causes the cutting head to be moved forward with respect to the shield body, thereby causing the excavation and unloading device 78 to move forward.
The displacement caused by this is advanced to the stroke end of the jack 26.

Thereafter, the rotation of the cantahend 34 is stopped, and the sixth.
As shown in FIG. 7, the canter 46 is retracted, and the two support shoes 42 are positioned and extended so that they come into contact with the ground at the invert part of the tunnel according to the indications of the indicator 47. The cutter head is fixed to the ground 111.

Before and after fixing the tar head 34, the segment 60 is moved to the ground 11 by the jack 58. + to fix the segment erector 50 (FIG. 6). After that, operate the jack 18, and reverse the above, the shield main body 12
The hair is contracted and engaged with the ground, releasing the fixation and applying a forward force to all the hairs.

It is carried by the tarhead 34 and the rear segment erector 50. While the shield body is supported by the cutter head and segment erector, the shield body 12 is moved from the position shown in FIG. 6 to the position shown in FIG. 1 by operating the jaws 26 in the opposite direction. will be moved.

Thereafter, the cutter head 34 prepares for excavation. The jacking reaction force required to move the shield body 12 due to the operation of the jack 26 or the jack and jack 52 can be obtained by applying it to the ground via the cutter head 34 and the segment erector 50. By also using the roundness holding device 64 connected to the shield body 12 by the guide /<-72, an even larger jacking reaction force can be obtained.

According to the invention, the shield body". , divided into two parts below,
These and the cutter head and segment erector are alternately fixed to the ground and are made to bear the propulsion reaction force, while one is propelled in the direction of the tunnel axis with respect to the other, making it possible to reduce the overall impact of the shield excavation equipment. The structure can be simplified, its length and weight can be reduced, and its propulsion resistance can be reduced.

Further, according to the present invention, by providing the recess and the slit at the bottom of the shield body, the propulsion resistance of the shield body is further reduced, and the segment pressing against the ground by the segment electric This can be done through a further reduction of the length of the shield body.
It becomes f-ability.

Furthermore, according to the present invention, since the additional propulsive reaction force for the shield body can be applied to the ground through the perfect circle holding device, large-scale equipment with large linear resistance can be used. The present invention can also be advantageously applied.

[Brief explanation of the drawing]

1 is a longitudinal cross-section of a device according to the invention, FIG. 2 is a cross-sectional view taken 11 degrees along line 2--2 of FIG. 1, and FIG. 3 is a bottom view;
FIG. 4 is a view of the force and turgent; FIG. 5 is a cross-sectional view taken along the line 5--5 of FIG. 1; FIG. 6 is a view similar to FIG. 1 in the propulsion state of the shield body; FIG. 7 is a diagram similar to FIG. 2 when the shield body ML is advanced. 12: Shield body, 14 +, l part, 16: Lower part, 18: Jacket, 19a, recess, 19b Nislit, 24: Surrounding part, 26: Jacket (first hydraulic device), 28 Nisly IS part, 30: Drive device, 32: Drive shaft, 34 Countertop, 36: Spoke, 40
, 44: Jack, 42: Support shoe, 46: Canter, 47: Indicator, 50: Segment erector, 52: Jack (second hydraulic device), 58: Segment gripping arm (jack), 60: Segment, 64: Perfect circle holding device, 72 Ni guide bar, 74: Jacket (third hydraulic device), 78 Sliding and unloading device. Agent Patent Attorney Nobuyuki Matsunaga Figure 1-5 Figure 2 Figure 3 Figures 1 to 4

Claims (1)

[Scope of Claims] (1) A shield body comprising a plurality of jacks connecting the pan portion, the lower portion, and both portions, and a cutter spatula slidably supported on the shield body.
a drive mechanism, a cutter hend connected to the cutter hend drive mechanism and having a canter and a support shoe on the outer periphery that can be moved in and out by a hydraulic device;
a segment erector including a segment gripping arm that is extendable and retractable to press the segment; a first hydraulic device that relatively moves the forceter hand drive mechanism and the shield body in the tunnel axis direction; and the shield. a second hydraulic device that relatively moves the main body device and the segment erector in the tunnel axis direction;
Shield tunnel excavation device. (2) 1 part, a lower part having a recess in the lower part and a slit opened to the rear thereof, and a shield body comprising a plurality of jacks connecting both the upper and lower parts; a slide portion that is slidably supported and includes a cutter hend drive unit; a cutter hend that is connected to the force cutter hend drive unit N and includes a cutter and a support shoe that can be moved in and out on the outer periphery; a segment erector including a segment gripping arm that is extendable and retractable to press the segment into the ground through the ground; a first hydraulic device that relatively moves the cutter hand drive device and the shield body; and the shield. A shield tunnel excavation device including a second hydraulic device that relatively moves a main body device and the segment electric device. (3) A shield main body comprising an upper part, a lower part having a recess in the lower part and a slit opening to the rear, and -1- a plurality of jacks connecting the lower parts, and a sliding part on the lower part of the shield main body. a slide part with a cutter head drive device supported on the cutter head; a cutter hand with a cutter and a support shoe connected to the cutter head drive bag δ and movable in and out of the outer periphery; ! a segment erector including a segment gripping arm that can be extended and retracted to suppress a second hydraulic device for relatively moving the I-erector; a roundness holding device comprising a force member, a lower member, and a plurality of jacks for connecting both members; The third one that moves the shield body relative to the other! (A shield tunnel excavation device including a k-pressure device and a means for guiding the movement of the circularity holding device toward the shield body. The device according to claim 3, comprising an indicator for displaying the rotational angular position of the device. (5) f: The cutter and support shoe described in 4 are respectively arranged on the cutter head. Device according to claim 3, which is operated in and out by the main. (6) According to claim (3), one end of the first hydraulic device is attached to a lower portion of the shield body, and the other end is attached to a ring member fixed to the slide portion. equipment. (7) The cutter head has a plurality of spokes, the support shoes are arranged on two spokes, and the canters are arranged on the remaining spokes, and the support shoes are moved in and out from the outer ends of the spokes. and a jack for operating the cutter in and out of the outer end of the spoke are respectively disposed within the spoke.
The device according to claim (3)m. (8) The perfect circle holding device includes an upper member and a lower member each having an arcuate surface, and a plurality of jacks that are located between the two members and connect these members so that they can expand and contract. The device described in paragraph (3).