JPH01227000A - Shield excavator - Google Patents

Abstract

PURPOSE:To make the assembly of segments easier by a method in which a pushing force is applied to the ends of segments by using the back and forth slidable rod of a segment pusher and a pushing mechanism provide on the upper part of a machine. CONSTITUTION:The oil-pressure cylinder 11 of a segment pusher 8 set in parallel with the lengthwise direction of a shield machine 2 on the machine is operated to advance a back and forth slidable rod 12. The propulsive force of the cylinder 11 is converted into a pushing force having components in the expanded diameter direction of the segment 1 by an L-shaped segment receiving seat 20 mounted in a sliding manner on the slide guide face 18 of a pushing mechanism 14, which the end of the upper segment 1' of a segment ring assembled in the machine is pushed up. The construction work can thus be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shield tunneling machine, and particularly to a multiple shield tunneling machine suitable for simultaneously constructing a plurality of shield tunnels in parallel.

[Conventional technology]

When constructing a tunnel using a multiple shield excavator, −
Figure 4 shows an example of an assembled exploded view of a segment used as a lining material.The six examples are those used in a double shield excavator, and the circular arcs forming the missing rings on both sides. Shaped segments 1-1° 1-2. 1-3 and 1-4.
1-5. 1-6, deformed segments 1-7, 1-8 connecting the missing ring portions on both sides, and a central column segment 1-9.

Normally, these segments are assembled using two erectors 9-1 installed on the left and right inside the shield excavator, as shown in Figure 5.
．． 9-2, arc segment 1 from the bottom to the top.
-1 to 1-6 and irregularly shaped segments 1-7, 1-8 are assembled with bolts temporarily tightened, and finally strut segment 1-
Insert 9.

This is done in the order of fully tightening the bolts. Here, the joint surfaces of the strut segment 1-9 and irregularly shaped segments 1-7, 1-8 are generally made into horizontal surfaces to avoid applying shear force to the connecting bolts due to vertical loads such as earth pressure. be.

[Problem to be solved by the invention]

In the above segment assembly work, when inserting the strut segment 1-9, if the existing segment is only temporarily tightened, the temporarily tightened upper segment will 1-1.1-4.1-7 will sag under its own weight, which causes a problem that if the joint surface of the strut segment 1-9 is made a horizontal plane, the last strut segment 1-9 cannot be inserted. . As a countermeasure, it is possible to push up the hanging upper segment using a hydraulic jack, etc., and insert the strut segment 1-9 with the diameter enlarged by the rearance required for inserting the strut segment 1-9. It will be done. However, with the mechanism in which the upper segment is directly pushed up with a hydraulic jack, excavation equipment such as an erector and a screw conveyor for soil removal are present in the inner space of the segment, and there is not enough space to install the jack for pushing up the segment.
Cannot be hired.

A first object of the present invention is to eliminate mutual interference of segments, which is a problem especially in multiple shield tunneling machines, and to enable assembly of segments without being subject to the above-mentioned space constraints. .

Furthermore, in a multiple shield excavator, excavation is carried out simultaneously using multiple rotary cutters that are arranged abruptly so that they partially overlap, so meandering tends to occur due to an unbalanced load on each rotary cutter. , direction correction during excavation becomes an important issue.

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

(Means for Solving Problem 11) In order to achieve the above object, the invention according to claim 1 provides a shield excavator in which segments are assembled inside the machine and the segment is propelled as a reaction force receiver. a hydraulic jack arranged parallel to the length direction, a rod connected to the hydraulic jack and supported so as to be movable back and forth by a guide member fixed to the shield body, and attached to the tip of the rod, 3. A segment pressing device comprising a pressing mechanism section that converts the thrust of the hydraulic jack into a pressing force having a component in the segment diameter expansion direction and transmits the converted force to the end of the assembled segment. According to the invention, the segment suppressing device is provided at a plurality of locations along the inner periphery of the shield body, in addition to the upper part of the inside of the machine, so that it can be used for direction correction during excavation.

As claimed in claim 3, the pressing mechanism section of the segment pressing device includes a sliding guide surface provided at the tip of the rod in a diagonal direction with respect to the rod axis direction, and is slidably mounted on the guide surface. Alternatively, as set forth in claim 4, a plurality of link members having fulcrum portions at the tip end of the rod and the shield body side, respectively, and a plurality of link members coupled to these link members may be configured. It may also be configured with an L-shaped segment receiving seat.

[Effect]

In the invention according to claim 1, when the hydraulic jack of the segment pressing device provided at the upper part of the machine is extended and the rod is advanced, the pressing mechanism at the tip of the rod pushes the end of the upper segment of the segment ring assembled in the machine. The diametrically expanding component of the pressing force acts to push up the upper segment. Therefore, if the segment suppressing device is activated at the stage when the arcuate segments 1-1 to 1-6 and irregularly shaped segments 1-7 and 1-8 in FIG. 4 are temporarily tightened,
As shown by the two-dot chain line 711 in FIG. 6, the hanging upper segment due to its own weight is pushed up and expanded in diameter, allowing the support column segment 1-9 to be inserted.

In addition, when the segment suppression device is activated after all segments have been assembled, the segment end that has already been fixed is used as a reaction force receiver, and the pressing mechanism section is applied to the segment end against the shield body on which the segment suppression device is attached. A force in the opposite direction to the transmitted pressing force acts, deflecting the digging direction downward.

Therefore, as claimed in claim 2, by disposing similar segment pressing devices not only in the upper part of the machine but also in multiple locations along the inner circumference of the shield body, these segment pressing devices can be selectively activated. It is possible to adjust the direction of the shield tunneling machine in the vertical and horizontal directions.

〔Example〕

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

Figures 1 to 3 show an embodiment in which the present invention is applied to a dual-shield excavator.The front part of the shield body 2, which has an eyeglass-shaped outer shape, has two spoke-shaped rotating parts on the left and right sides. Cutter 3-
1.3-2 are arranged in the same plane, and these rotary cutters are driven to rotate in synchronization in opposite directions so that their excavation ranges partially overlap and the cutter spokes do not interfere with each other. 6-turn cutter 3 with
-1.3-2 The inside of the machine, which is separated from the face side by a bulkhead 4, includes a cutter drive motor 5 that independently drives each rotary cutter, a screw conveyor 6 for earth removal, and a shield jack for propulsion. 7 and a segment pressing device 8 are installed, and furthermore, two erectors 9-1 and 9-2 for assembling the segments 1 are installed at the tail portion of the shield body 1.

This embodiment is an example in which the segment suppression device is placed in two upper locations inside the machine shown at 8-1.8-2 in Fig. 3, utilizing the space between the shield jacks 7. The spreaders 10 on both sides of the suppression 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, and a guide member 1.
3. Consists of a pressing mechanism part 14, a guide member 13 having a guide hole in the center is attached to the inner peripheral part of the shield body 2 via a bracket 15, and a jack mounting bracket 16 provided on the face side of the guide member 13. Hydraulic jack 1
1 is attached parallel to the length direction of the shield body 2, and the face side end of the rod 12 passing through the guide member 13 is connected to the piston rod of the hydraulic jack 11 by a joint 17.
The rod 12 is moved back and forth by the expansion and contraction of the hydraulic jack 11. A sliding movement guide surface 18 is provided at the end of the rod 12 on the inside side of the shaft in a diagonal direction with respect to the axial direction of the rod, and a linear bearing 19 is mounted on the guide surface. A segment receiving seat 20 is movably mounted thereon to constitute 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 bottom surface of the upper segment 1 assembled in the machine, and is normally located at the lower end of the sliding guide surface 18 due to its own weight.

Next, the operation of the segment pressing device 8 will be explained.

FIGS. 9 to 11 are explanatory diagrams of the operation.

Using Erecta 9-1.9-2, arc-shaped segments 1-1 to 1-6 and irregular-shaped segments 1-7.1 shown in FIG.
-8 is assembled and temporarily tightened from the bottom to the top, and when the hydraulic jack 11 is extended and the rod 12 is advanced, the segment receiving seat 20 of the pressing mechanism section 14 initially moves the rod 12 in the direction of the arrow a in FIG. move with As shown in FIG. 10, when the rod 12 moves further after the segment receiving seat 20 comes into contact with the end face of the upper segment 1' that hangs down due to its own weight, the segment receiving seat 20 absorbs the reaction force received from the end face of the segment 1'. Due to this, the sliding guide surface 18
, move in the direction of arrow C, approach the lower surface of segment 1' as shown by arrow C, and then press segment receiving seat 2.
0 comes into contact with the lower surface of the segment 1', the thrust of the hydraulic jack 11 generates a pressing force P in the direction perpendicular to the movement guide surface 18.
acts on the upper segment 1', and its horizontal component force Px presses the upper segment 1' against the succeeding segment 1, and at the same time, its vertical component force PY pushes up the end of the upper segment 1'.

Figure 11 shows a state in which the upper segment 1 has been pushed up to the normal assembly position, and from this state the upper segment 1 is pushed up further by the amount of clearance necessary for inserting the strut segments 1-9 shown in Figure 4. When the diameter is expanded, the extension of the hydraulic jack 11 is stopped, and after the strut segment 1-9 is inserted as shown in FIG. 5, the hydraulic jack 11 is retracted and the pressing mechanism section 14 is returned to its original position.

By operating the segment pressing device 8 as described above, it is possible to assemble the segments while eliminating mutual interference of the segments due to the lowering of the upper segment. Furthermore, according to this embodiment, since the hydraulic jacks 11 are arranged parallel to the length direction of the shield body 2, the segment pressing device 8 can be installed between the shield jacks 7 with sufficient space. It is possible.

FIG. 12 shows another embodiment of the segment pressing device 8.

This embodiment includes a link member 21 having a fulcrum portion 24 on the inner peripheral side of the shield body 2, and a fulcrum portion 25 at the tip of the rod 12.
The L-shaped segment receiving seat 20 is connected to the link member 22, 23 having 26 with a pin 27, 28, and the pressing mechanism part 14
The other structure is the same as that shown in FIG. FIG. 13 is a diagram showing its operating state, in which when the rod 12 is advanced by the hydraulic jack 11, the segment receiving seat 20 is moved to the link member 2 which acts as a parallel link.
2.23, while maintaining the same posture, link member 21
moves on an arc centered on the fulcrum part 24 of the upper segment 1', contacts the end of the upper segment 1' which is hanging down due to its own weight, and applies a pressing force P having a horizontal component force PX and a vertical component force PY to the segment 1' Tell the end. This makes the upper segment 1
' is pushed up, and the strut segments 1-9 can be inserted.

Next, the direction correction function of the segment pressing device 8 will be explained. After the assembly of all the segments is completed, as shown in FIG. 11, when the hydraulic jack 11 of the segment pressing device w8 is extended and a pressing force P having a diameter expansion direction component PY is applied to the upper segment 1 from the pressing mechanism part 14, Since the upper segment 1 is already in a fixed state, a force in the opposite direction to the pressing force P is applied to the pressing mechanism part 14 using the end of the upper segment 1 as a reaction force receiver, and this force is applied to the rod 12 and the guide member 13.
, is transmitted to the shield body 2 via the bracket 15,
Since it becomes a force that tends to deflect the direction of excavation downward, it can be used to correct the direction of the shield excavator.

The embodiment shown in FIG. 14 is used as a direction correction means, so the two upper parts 8-
In addition to 1.8-2, a similar structure is installed between the shield jacks 7 at two lower locations 8-3.8-4 along the inner circumference of the shield body 2 and two locations 8-5.8-6 on the left and right sides. This is an example in which a segment suppression device is installed, and for example, pitching correction is performed using segment pressure devices 8-1 to 8-4 at four upper and lower locations.
It is possible to perform yawing correction using segment pressing devices 8-5 and 8-6 at two locations on the left and right.

In this case, if the shield jack 7 is used for rolling correction, it will be easier to control the direction of the dual shield excavator, which tends to meander due to unbalanced loads on the single-rotation cutter 3-1, 3-2, etc. Can be done.

In the above embodiments, an example of a dual shield tunneling machine has been described, but the present invention can be applied to all multiple shield tunneling machines that have a plurality of rotating cutters, and if necessary, a shield tunneling machine that has a single cutter can be used. It can also be applied to excavators.

〔Effect of the invention〕

According to the present invention, it is possible to install the segment suppressing device that pushes up the temporarily tightened upper segment to expand its diameter without being subject to space constraints inside the shield main body.
In particular, it is possible to prevent the upper segment from sagging due to its own weight during the segment assembly process, which is a problem in multiple shield tunneling machines, and to enable the segment to be inserted later, thereby eliminating obstacles in segment assembly.

In addition, this segment pressing device is installed at multiple locations along the inner circumference of the shield body, in addition to the upper part of the machine. This can also be used to correct the direction of excavation after segment assembly is completed, and has the effect of facilitating direction control of the shield excavator.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a dual shield excavator that is an embodiment of the present invention, Fig. 2 is a view taken along arrow A in Fig. 1, and Fig. 3 is a sectional view taken along line B-B in Fig. 1. , Fig. 4 is an exploded assembly diagram of a primary lining segment used in a dual shield excavator, Fig. 5 is a segment assembly procedure diagram, and Fig. 6 is a diagram for explaining problems in segment assembly. Front view, Figure 7 is a sectional view on the same side,
FIG. 8 is a detailed sectional view of the segment suppression device shown in FIG. 1, FIGS. 9 to 11 are diagrams of its operating state, and FIG. FIG. 13 is a diagram showing its operating state, and FIG. 14 is a cross-sectional view of a double shield excavator which is another embodiment of the present invention. 1...Segment, 2...Shield body, 7...
Shield jack, 8... Segment suppression device, 9.
...Erector, 11...Hydraulic jack, 12...Rod, 13...Guide member, 14...Press mechanism section,
18... Swing guide surface, 19... Linear bearing, 20... Segment receiving seat, 21° 22, 23...
・Link member, 24.25.26...Fully point, 27°28...Connecting pin. Patent applicant Ishikawajima-Harima Heavy Industries Co., Ltd. Hitachi Construction Machinery Co., Ltd. Representative patent attorney Masami Akimoto (1 other person) Figure 2 Figure 3

Claims (1)

[Claims] 1. In a shield excavator that assembles segments inside the machine and propels them as reaction force receivers, there is provided a hydraulic jack disposed in the upper part of the machine in parallel with the length direction of the shield body, and the above-mentioned hydraulic jack. A rod is connected to the shield body and supported so as to be movable back and forth by a guide member fixed to the shield body, and the rod is attached to the tip of the rod, and the thrust force of the hydraulic jack is applied to a pressing force having a component in the segment diameter expansion direction. 1. A shield excavator characterized by being provided with a segment pressing device comprising a pressing mechanism unit that converts into a pressing mechanism and transmits a message to an end of an assembled segment. 2. In a shield tunneling machine that assembles segments inside the machine and propels them as reaction force receivers, in addition to the upper part of the machine, there are multiple segments placed parallel to the length of the shield body at multiple locations along the inner circumference of the shield body. a hydraulic jack; a rod connected to the hydraulic jack and supported so as to be movable back and forth by a guide member fixed to the shield body; 1. A shield excavator comprising a segment pressing device comprising a pressing mechanism unit that converts the pressing force into a pressing force having a directional component and transmits the converted force to the end of the assembled segment. 3. The shield excavator according to claim 1 or 2,
The pressing mechanism section includes a sliding guide surface provided at the tip of the rod in a diagonal direction with respect to the rod axis direction, and an L-shaped segment receiving seat mounted on the guide surface so as to be freely movable. A shield excavator characterized by the following configuration. 4. The shield excavator according to claim 1 or 2,
The shield characterized in that the pressing mechanism section is composed of a plurality of link members each having a fulcrum at the tip of the rod and the shield body side, and an L-shaped segment receiving seat coupled to these link members. digging machine.