JP2557452B2 - Shield machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a shield machine, and more particularly to a multiple shield machine suitable for simultaneously constructing a plurality of shield tunnels in parallel.

[Conventional technology]

When building a tunnel with multiple shield machine,
An example of the assembly development view of the segment used as the primary lining material is shown in FIG. This example is used in a double shield machine, and the arc-shaped segments 1-1, 1-2, 1-3 and 1-4, 1-5, 1- that compose the truncated ring portions on both sides.
6 and odd-shaped segment 1-
It consists of 7,1-8 and a central strut segment 1-9.

Assembling of these segments is usually performed by the two left and right erectors 9- installed in the shield machine as shown in FIG.
Arc segment 1 from bottom to top using 1,9-2
-1 to 1-6 and the odd-shaped segments 1-7 and 1-8 are temporarily fastened with bolts, and then assembled, and finally the column segment 1-9.
Insert and tighten the bolts in this order.
Here, the pillar segment 1-9 and the odd-shaped segment 1-7,
The joint surface 1-8 is generally a horizontal surface in order to avoid applying shearing force to the connecting bolt due to vertical load such as earth pressure.

[Problems to be Solved by the Invention]

In the segment assembly work as described above, when the pillar segments 1-9 are inserted, if the existing segments are only temporarily fastened, the upper segment temporarily fastened as shown by the two-dot chain lines in FIGS. 6 and 7. 1-1,1-4,1-7 hang down under its own weight. Therefore, if the joint surface of the pillar segment 1-9 is horizontal, the last pillar segment 1-
The problem that 9 cannot be inserted arises. As a countermeasure, it is conceivable to push up the hanging upper segment with a hydraulic jack etc. and insert the column segment 1-9 with the extra diameter expanded by the clearance required to insert the column segment 1-9. To be However, a mechanism that directly pushes up the upper segment with a hydraulic jack cannot be adopted because there is excavation equipment such as an erector or a screw conveyor for soil discharge in the space inside the segment, and there is no room to install the segment pushing jack.

A first object of the present invention is to eliminate the above-mentioned space restrictions and to eliminate the mutual interference of segments, which is a problem particularly in a multiple shield machine, and to enable the assembly of the segments.

Furthermore, in the multiple shield machine, since excavation is performed simultaneously by a plurality of rotary cutters arranged in a partially overlapping state, there is a tendency for meandering to occur due to unbalanced load of each rotary cutter, etc. Correcting the direction when digging is an important issue.

A second object of the present invention is to provide effective means for correcting the direction of a shield machine.

[Means for solving the problem]

In order to achieve the above-mentioned object, the invention according to claim 1 is a shield machine in which segments are assembled in a machine and is propelled by receiving a reaction force. A jack, a rod connected to the hydraulic jack and supported by a guide member fixed to the shield body so as to be movable back and forth, and mounted on the tip of the rod to increase the thrust of the hydraulic jack in the segment radial direction. A segment pressing device including a pressing mechanism section that converts the pressing force having the above component to the end of the assembled segment is provided.

According to a second aspect of the present invention, the segment pressing device is provided not only in the upper part of the machine but also at a plurality of positions along the inner circumference of the shield body so that it can be used for correcting the direction during excavation.

The pressing mechanism portion of the segment pressing device is mounted on the tip end portion of the rod in a slanting direction with respect to the axial direction of the rod, and slidably mounted on the guide surface. And a plurality of link members each having a fulcrum portion on the tip end portion of the rod and on the shield body side as described in claim 4, and connected to these link members. And an L-shaped segment receiving seat.

[Action]

In the invention of claim 1, when the hydraulic jack of the segment pressing device provided in the upper part of the machine is extended and the rod is moved forward, the pressing mechanism portion at the tip of the rod moves the end of the upper segment of the segment ring assembled in the machine. It acts so as to push up the upper segment with the radially expanding component of the pressing force. Therefore, if the segment pressing device is operated at the stage where the arc-shaped segments 1-1 to 1-6 and the irregular-shaped segments 1-7 and 1-8 in FIG.
As shown by the chain double-dashed lines in FIGS. 6 and 7, the upper segment that hangs down by its own weight can be pushed up and the diameter can be increased so that the pillar segment 1-9 can be inserted.

Also, when the segment pressing device is operated after the assembly of all segments is completed, the already fixed segment end is used as a reaction force receiving force from the pressing mechanism to the segment end with respect to the shield body with the segment pressing device attached. A force in the opposite direction to the transmitted pressing force acts and deflects the excavation direction downward.

Therefore, as described in claim 2, by arranging similar segment pressing devices not only in the upper part of the machine but also at a plurality of positions along the inner circumference of the shield body, these segment pressing devices are selectively operated. The direction of the shield machine can be corrected vertically and horizontally.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment applied to the double shield machine of the present invention. On the front part of the shield body 2, which has a spectacle-shaped outer shape, two spoke-shaped rotary cutters 3 on the left and right are provided.
-1, 3-2 are arranged in the same plane, and these rotary cutters are rotationally driven in synchronization with each other in opposite directions so that the excavation areas partially overlap with each other and the Katta pork does not interfere with each other. It is like this. Rotary cutter 3
Inside the machine, which is separated from the face by the partition wall 4 behind -1, 3-2, is a cutter drive motor 5 for independently driving each rotary cutter, a screw conveyor 6 for soil discharge, and a shield jack 7 for propulsion. Further, a segment pressing device 8 is installed, and further, two erectors 9-1 and 9-2 for assembling the segment 1 are installed in the tail portion of the shield body 1.

This embodiment is an example in which the segment pressing device is arranged at the upper two places in the machine shown by 8-1 and 8-2 in FIG. 3 by utilizing the space between the shield jacks 7. The spreaders 10 on both sides of the device 8 are cut short.

As shown in detail in FIG. 8, the segment pressing device 8 includes a hydraulic cylinder 11, a rod 12, a guide member 13,
A guide member 13 having a guide hole in the center is attached to the inner peripheral portion of the shield body 2 via a bracket 15, and a hydraulic pressure is applied to a jack attachment bracket 16 provided on the face side of the guide member 13. The jack 11 is mounted parallel to the length direction of the shield body 2, the face end of the rod 12 penetrating the guide member 13 is connected to the piston rod of the hydraulic jack 11 by a joint 17, and the hydraulic jack 11 is expanded and contracted. The rod 12 is moved back and forth, and a sliding guide surface 18 is provided at the end of the rod 12 on the inner side of the mine in a direction oblique to the rod axial direction, and a segment bearing seat 20 is provided on the guide surface via a linear bearing 19. Is movably mounted to form a pressing mechanism section 14. The segment receiving seat 20 is formed in an L shape so as to abut from the end surface to the lower surface of the upper segment 1 assembled in the machine, and is normally located at the lower end of the sliding guide surface 18 by its own weight.

Next, the operation of the segment pressing device 8 will be described. Ninth
FIG. 11 to FIG. 11 are explanatory diagrams of the operation.

Using the erectors 9-1 and 9-2, the arc-shaped segments 1-1 to 1-6 and the odd-shaped segments 1-7 and 1- shown in FIG.
8 is assembled from the lower part to the upper part and temporarily tightened, the hydraulic jack 11 is extended and the rod 12 is moved forward, so that the segment receiving seat 20 of the pressing mechanism portion 14 first moves together with the rod 12 in the direction of arrow a in FIG. Moving. As shown in FIG. 10, after the segment seat 20 contacts the end face of the upper segment 1'which hangs down by its own weight, when the rod 12 further advances, the segment seat 20 receives the reaction force from the end face of the segment 1 '. Moves along the sliding guide surface 18 in the direction of the arrow b, approaches the lower surface of the segment 1'as indicated by the arrow c, and after the segment receiving seat 20 contacts the lower surface of the segment 1 ', the hydraulic jack The thrust force of 11 acts as a pressing force P in the direction perpendicular to the sliding guide surface 18 and the upper segment 1 '
And the horizontal component force P _X pushes the upper segment 1 ′ onto the succeeding segment 1 and simultaneously the vertical component force P _Y.
Push up the end of the upper segment 1 '. FIG.
The state where the upper segment 1 is just pushed up to the regular assembly position is shown. From this state, the hydraulic pressure is further increased by pushing up the upper segment 1 by a clearance necessary for inserting the column segment 1-9 shown in FIG. The extension of the jack 11 is stopped, and after the column segments 1-9 are inserted as shown in FIG. 5, the hydraulic jack 11 is tightened and the pressing mechanism portion 14 is returned to the original position.

By operating the segment pressing device 8 described above, it is possible to assemble the segments without interfering with each other due to the hanging of the upper segment.
Further, according to the present embodiment, since the hydraulic jack 11 is arranged in parallel with the length direction of the shield body 2, the segment pressing device 8 can be installed between the shield jacks 7 with a sufficient space. Is.

FIG. 12 shows another embodiment of the segment pressing device 8.
In this embodiment, the link member 21 having the fulcrum portion 24 on the inner peripheral side of the shield body 2 and the link members 22 and 23 having the fulcrum portions 25 and 26 at the tip of the rod 12 are pinned with the L-shaped segment receiving seat 20. 2
The pressing mechanism portion 14 is formed by coupling with 7, 28, and the other structure is the same as that shown in FIG. FIG. 13 is an operation state diagram thereof, and when the rod 12 is moved forward by the hydraulic jack 11, the segment receiving seat 20 is kept in the same posture by the link members 22 and 23 acting as parallel links,
It moves on an arc centered on the fulcrum 24 of the link member 21 and contacts the end of the upper segment 1 ′ that hangs down by its own weight, and has a pressing force with a horizontal component force P _X and a vertical component force P _Y. P
To the end of the segment 1 '. As a result, the upper segment 1'is pushed up, and the pillar segments 1-9 are ready for insertion.

Next, the direction correcting function of the segment pressing device 8 will be described. After the completion of the assembly of all the segments, the hydraulic jack 11 of the segment pressing device 8 is extended as shown in FIG.
When pressing force P with P _Y is applied, upper segment 1
Is already fixed, the end of the upper segment 1 is used as a reaction force to apply a force in the direction opposite to the pressing force P to the pressing mechanism 14, and the force is applied to the rod 12, the guide member 13, the bracket.
The force is transmitted to the shield main body 2 via 15 and acts as a force to deflect the excavation direction downward, so that it can be used for correcting the direction of the shield excavator.

Since the embodiment shown in FIG. 14 is used as a direction correcting means, the upper portion 8-1 in the machine necessary for pushing up the segment,
In addition to 8-2, a segment pressing device having a similar structure between the lower two places 8-3, 8-4 and the two left and right places 8-5, 8-6 along the inner circumference of the shield body 2 The pitching correction is performed by using the segment pressing devices 8-1 to 8-4 at the four upper and lower positions, and the yawing correction is performed by using the segment pressing devices 8-5 and 8-6 at the two right and left positions. It is possible. In this case, if the shield jack 7 is used for rolling correction, the rotary cutter 3-
It is possible to easily control the direction of the twin shield machine, which is prone to meandering due to load imbalance of 1, 3-2.

In the above embodiment, the example of the double shield excavator has been described, but the present invention can be applied to all the multiple shield excavators having a plurality of rotary cutters, and if necessary, the shield excavator having a single cutter. Can also be applied to.

〔The invention's effect〕

According to the present invention, it is possible to install a segment pressing device for pushing up and expanding the diameter of the upper segment in the temporarily tightened state without being restricted by the space inside the shield body. It is possible to suppress the sagging due to the own weight of the upper segment during the assembly process, to allow the segment to be inserted later, and to eliminate obstacles in segment assembly.

In addition, by installing this segment pressing device at multiple locations along the inner circumference of the shield body in addition to the upper part inside the machine, it can be useful for correcting the excavation direction after the segment assembly is completed, and the direction control of the shield machine Has the effect of facilitating.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a double shield machine, which is an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. FIG. 4 is an assembly development view of a primary lining segment used in a double shield machine, FIG. 5 is a segment assembly procedure diagram, and FIG. 6 is a front view for explaining problems in segment assembly, Figure 7 is the same side sectional view,
FIG. 8 is a detailed sectional view of the segment pressing device shown in FIG. 1, FIGS. 9 to 11 are operation state diagrams thereof, and FIG. 12 is a side sectional view of another embodiment of the segment pressing device. FIG. 13 is an operation state diagram thereof, and FIG. 14 is a cross-sectional view of a double shield machine as another embodiment of the present invention. 1 ... Segment, 2 ... Shield body, 7 ... Shield jack, 8 ... Segment pressing device, 9 ... Electa, 11 ... Hydraulic jack, 12 ... Rod, 13 ... Guide member, 14 ... Pressing Mechanical part, 18 ... Sliding guide surface, 19 ...
… Linear bearings, 20 …… Segment seats, 21,22,23
...... Link members, 24,25,26 …… Support points, 27,28 …… Coupling pins.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (73) Patent holder 999999999 Daitoyo Construction Co., Ltd. 1-24-4 Shinkawa, Chuo-ku, Tokyo (72) Inventor Ryusaburo Otsuka 13 Showa-cho, Minato-ku, Nagoya-shi, Aichi Ishikawa Shima Harima Heavy Industries (72) Inventor Seiji Tadano, 650 Jinrachicho, Tsuchiura, Ibaraki Hitachi Construction Machinery Co., Ltd. (72) Inventor Hidetsugu Yamazaki, 650, Jincho, Tsuchiura, Ibaraki Hitachi Construction Machinery, Tsuchiura Co., Ltd. Inside the factory (72) Inventor Kiyoshi Tsuchiya 650 Kazunachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura factory

Claims (4)

(57) [Claims] 1. A shield machine for assembling a segment in a machine and propelling it by receiving a reaction force, which is connected to the hydraulic jack arranged in parallel with the longitudinal direction of the shield body at the upper part of the machine. , A rod supported so as to be movable back and forth by a guide member fixed to the shield body, and mounted on the tip of the rod to convert the thrust of the hydraulic jack into a pressing force having a component in the segment radial direction. A shield machine having a segment pressing device including a pressing mechanism portion for transmitting the end portion of the assembled and assembled segment. 2. A shield excavator for assembling segments in a machine and propelling them by reaction force reception, in addition to the upper part of the machine, at a plurality of locations along the inner circumference of the shield body, in parallel with the length direction of the shield body. The arranged hydraulic jack, a rod connected to the hydraulic jack and supported by an eyed member fixed to the shield body so as to be movable back and forth, and attached to the tip of the rod to increase the thrust of the hydraulic jack. A shield machine comprising a segment pressing device including a pressing mechanism portion that converts the pressing force having a component in the segment radial direction and transmits it to the end of the assembled segment. 3. The shield machine according to claim 1 or 2, wherein the pressing mechanism portion is a sliding guide surface provided at an end of the rod in a direction oblique to the rod axial direction, and on the guide surface. A shield machine comprising an L-shaped segment seat mounted so that it can slide freely. 4. The shield machine according to claim 1 or 2, wherein the pressing mechanism portion is connected to a plurality of link members each having a fulcrum portion on the tip portion of the rod and on the shield body side. A shield machine having a L-shaped segment seat.