JP2003056298A - Elector device and tunnel excavator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elector device and a tunnel excavator which contribute to improvement in excavation efficiency and in reliability by controlling the driving speed of the tunnel excavator with high accuracy. SOLUTION: According to the tunnel excavator, a pedestal 28 is extended rearward from a support column 27 erected at the rear of an excavator main body 11, and the elector device 29, a scaffold 30, and a form retention device 31 are set on the pedestal 28. Then, in the elector device 29, a mobile body 33 is movably supported by a sliding jack 42 along a guide rail 32 fixed to the pedestal 28 in a tunnel longitudinal direction, and a rotary ring 46 is rotatably supported by the mobile body 33, followed by arranging a holding grip 52 on the rotary ring 46 in a vertically movable manner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as an erector device for assembling a lining member such as a segment in a ring shape on the inner wall surface of an existing tunnel, and as a shield excavator or tunnel boring machine equipped with this erector device. Regarding tunnel excavator.

[0002]

2. Description of the Related Art Generally, in a shield excavator, a cutter head which can be driven and rotated is rotatably mounted on a front portion of a cylindrical excavator body, and a large number of cutter bits are attached to the cutter head, while a rear portion is mounted on the rear portion. Is equipped with a large number of shield jacks for propelling the excavator body, and is equipped with an erector device for assembling segments on the inner wall surface of an existing tunnel. Therefore, when the shield jack is extended while rotating the cutter head, the excavator main body propels the excavator body by receiving the excavation reaction force from the existing segment, while the cutter head excavates the ground in front, while the erector device makes a segment on the tunnel inner wall surface. By assembling
You can build tunnels in succession.

In such a shield excavator, in the erector device, a swivel ring is supported at the rear of the excavator body so as to be swivelable in the tunnel circumferential direction, and an elevating arm is provided in the swivel ring along the tunnel radial direction. Movably supported,
A holding grip capable of holding the segment is attached to the tip of the elevating arm. Therefore, the holding grip first moves up and down to hold the loaded segment in the existing tunnel, then turns to a predetermined mounting position, and moves up and down again to mount the held segment on the inner wall surface of the tunnel.

[0004]

As described above, the conventional elector device has a good balance because it is cantilevered by being extended rearward from the turning ring supported by the rear part of the excavator body. It is necessary to reduce the size in order to secure However, a plurality of hydraulic jacks are attached to the holding grip as a fine adjustment mechanism in the longitudinal direction and the radial direction of the tunnel. Since the holding grip turns together with the turning ring, the hydraulic unit for each hydraulic jack is mounted on the excavator. It cannot be installed on the main body side and must be mounted on the swivel ring. However, it is not possible to mount a sufficient hydraulic unit to prevent the swivel ring from increasing in size and weight, and it is not possible to move the holding grip at high speed. However, there is a problem that

Further, in general, the segment is conveyed in a tunnel by a hoist, and is positioned by the segment supply device behind the excavator main body so that the segment can be held by the erector device, and the erector device is elevated and positioned. Is designed to hold. Therefore, the segment is transferred in order of the hoist, the segment supply device, and the erector device, and the segment is transported for a long time, resulting in poor workability.

The present invention solves such a problem, and a tunnel excavator and a tunnel excavation method in which excavation workability and reliability are improved by controlling the propulsion speed of the tunnel excavator with high accuracy. The purpose is to provide.

[0007]

According to another aspect of the invention, there is provided an eclectic device for assembling a lining member in a ring shape on an inner wall surface of an existing tunnel. A movable body supported so as to be movable along the direction, a swing ring supported by the movable body so as to be rotatable along the tunnel circumferential direction, and a movable body supported by the swing ring along the tunnel radial direction. It is characterized by comprising an elevating body and a holding grip which is attached to the elevating body and can hold a lining member.

Therefore, the holding grip is movable in the tunnel circumferential direction and the tunnel radial direction, and is movable in the tunnel longitudinal direction together with the moving body. In this case, it extends rearward from the device body (or the excavator body). It is desirable to movably support the moving body on the installed pedestal.A rail is attached to the pedestal and a guide roller that fits to the moving body rail is attached to movably support it. The guide mechanism may be provided so as to eliminate rattling in the horizontal and vertical directions during movement and work.

According to another aspect of the invention, the movable body is movably supported by a guide rail attached to the main body of the apparatus along a longitudinal direction of the tunnel, and the movable body is perpendicular to the guide rail. It is characterized in that a guide means for restricting horizontal movement is provided.

According to the third aspect of the present invention, the movable body is movably supported by a guide rail attached to the apparatus body along the longitudinal direction of the tunnel, and the movable body is predetermined with respect to the guide rail. It is characterized in that a positioning means for positioning at the position is provided.

According to a fourth aspect of the present invention, a pair of front and rear support rings are connected to the movable body, and a plurality of support rollers are pivotally mounted along the circumferential direction between the pair of support rings. The turning ring is supported by a plurality of supporting rollers so as to be turnable along the circumferential direction of the tunnel.

According to a fifth aspect of the present invention, there is provided a tunnel excavator having a tubular excavator main body, a propulsion jack for advancing the excavator main body, and a drive rotatably mounted front portion of the excavator main body. A cutter head, a gantry extending rearward from a rear portion of the excavator body, an erector device that is movably supported by the gantry along a tunnel longitudinal direction and that assembles a lining member to an inner wall surface of an existing tunnel, Between the shape-retaining device, which is movably supported along the longitudinal direction of the tunnel on the gantry and presses against the inner peripheral surface of the existing lining member to retain it in a predetermined shape, between the erector device and the shape-retaining device. It is characterized in that it is provided with a work table which is positioned and movably supported on the gantry along the tunnel longitudinal direction and the tunnel circumferential direction.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic sectional view of a shield excavator equipped with an erector device according to an embodiment of the present invention, FIG. 2 is a front view of the erector device, and FIG. 3 is a schematic diagram showing a structure for supporting a moving body in the erector device. 4 shows the IV-IV cross section of FIG. 3, FIG. 5 shows the VV cross section of FIG. 3, and FIG. 6 shows the VI-VI cross section of FIG.

In the shield excavator of the present embodiment, as shown in FIG. 1, a cutter head 12 is rotatably mounted on the front part of a cylindrical excavator main body 11, and the front surface of the cutter head 12 is rotatably mounted. Many cutter bits 13
Is attached and the copy cutter 14 is attached. On the other hand, a ring gear 15 is fixed to the rear part of the cutter head 12, and a cutter turning motor 16 is attached to the excavator main body 11.
The drive gear 17 of is engaged with the ring gear 15. Therefore, when the cutter turning motor 16 is driven to rotate the drive gear 17, the cutter head 12 can be rotated via the ring gear 15.

The cutter head 1 is attached to the excavator body 11.
A bulkhead 18 is attached to the rear of the chamber 2, and a chamber 19 is formed between the cutterhead 12 and the bulkhead 18. Further, one end of the chamber 19 is opened at the other end of a mud sending pipe 20 and a mud discharging pipe 21 which are extended to the outside of the shield excavator.
An agitator 22 that stirs and mixes excavated soil and muddy water is installed near the opening of No. 1.

On the other hand, a plurality of shield jacks 23 are juxtaposed along the circumferential direction around the inside of the rear part of the excavator main body 11. The shield jacks 23 extend rearward in the excavation direction and the spreader 24 is attached to the existing segment S. By pressing, the excavator main body 11 can be moved forward by the reaction force.

A support wall 2 is provided at the rear of the excavator body 11.
5, a support cylinder 26 is formed, and a pair of left and right support pillars 27 are erected in the support cylinder 26 along the vertical direction. A pedestal 28 extends rearward from the support columns 27, and an erector device 29 for assembling the segments S, a work scaffold 30 for fastening the segments S assembled in a ring shape, and a ring on the pedestal 28. A shape holding device 31 that corrects and holds the segment S in a predetermined shape (for example, a perfect circle) is provided.

In this erector device 29, as shown in FIGS. 1 and 2, a pair of left and right guide rails 32 are fixed to the pedestal 28 by extending rearward from each support column 27. Have a U-shaped cross section that opens outwards from each other. A moving body 33 is movably supported on each of the left and right guide rails 32 along the longitudinal direction of the tunnel. The moving body 33 is restricted from moving vertically and horizontally with respect to each guide rail 32 by a guide means. In addition, it is possible to position it at a predetermined position by the positioning means.

That is, as shown in FIGS. 3 to 5, the moving body 33 is provided with a box-shaped mounting portion 35 having an arcuate outer surface and having a U-shaped cross section. The mounting portion 35 has a front portion and a rear portion. A pair of upper and lower vertical support members (support rollers) 36,
37 is attached. In addition, a pair of upper and lower horizontal support members (support rollers) 38 are mounted between the vertical support members 36 and 37 at the center of the mounting portion 35. The vertical support members 36, 37 are rollable on the upper and lower surfaces of the guide rail 32, and the horizontal support member 38 is rollable on the side surfaces of the guide rail 32. Horizontal support member 38
The guide means is constituted by the above.

Further, as shown in FIGS. 3 and 6, a pair of upper and lower positioning portions 39 are formed at the front end portion and the rear end portion of the moving body 33, respectively, while at the predetermined position of the guide rail 32, that is, Stopper jacks 40 are attached to the work positions where the erector device 29 carries out the work of assembling the segments S, and the taper-shaped positioning pins 41 can be freely inserted and removed. In this way, the positioning unit 39, the stopper jack 40, the positioning pin 41, and the like constitute the positioning means.

The tip of the drive rod 43 of the slide jack 42 attached to the mount 28 is connected to the moving body 33. In the above description, one of the guide means and the positioning means has been described, but the left and right sides have a substantially symmetrical shape.

As shown in FIGS. 1 and 2, a pair of front and rear support rings 44 and 45 are provided at predetermined intervals outside the left and right moving bodies 33 movably supported by the guide rails 32. It is fixed and this support ring 44, 4
A plurality of support rollers (not shown) are provided along the circumferential direction between the five.
Are rotatably mounted, and the swivel ring 46 is rotatably supported by the respective support rollers. Inner teeth are formed on the revolving ring 46, and the drive gear 48 of the revolving motor 47 attached to the support ring 44 meshes with the inner teeth of the revolving ring 46.

Therefore, each of the slide jacks 42 described above is
When the telescopic drive is performed, the turning ring 4 is moved through each moving body 33.
6 can be moved along the longitudinal direction of the tunnel, and when the turning motor 47 is driven, the turning ring 46 in which the drive gear 48 meshes can be turned.

The turning ring 46 includes a pair of left and right outer cylinders 4.
9 are fixed substantially parallel to each other, and an inner cylinder 50 is movably supported by each outer cylinder 49.
The lower end portion of is connected via an elevating arm 51, and a holding grip 52 is attached to the central portion of the elevating arm 51.
A lifting jack 53 is attached to each of the outer cylinders 49, and the tip of the drive rod is connected to the lifting arm 51. Therefore, when the lifting jack 53 is driven to expand and contract, the holding grip 52 can be moved along the tunnel radial direction via the lifting arms 51.

In this holding grip 52, a second grip box 55 is supported by a pitching jack 56 in a first grip box 54 attached to the elevating arm 51 so that the second grip box 55 can swing vertically. A third grip box 57 is supported therein by a fine adjustment jack 58 so as to be movable along the tunnel longitudinal direction. A grip jack 60 having a segment locking tool 59 is supported by a yawing jack 61 in the center of the third grip box 57 so as to be horizontally swingable, and support jacks 62 and 63 are provided on both sides thereof.

Since the slide jack 42 of the elector device 29 is a hydraulic jack and is attached to the pedestal 28, it can be easily connected to a hydraulic unit (not shown) mounted on the excavator body 11 by a supply / discharge hose. This hydraulic unit enables drive control of the slide jack 42 at high speed.

Further, as shown in FIG. 1, in the work scaffold 30, a horizontal moving beam 64 is movably supported along the tunnel longitudinal direction at a position behind the erector device 29 on the pedestal 28. It can be moved by a motor. A swing frame 65 is attached to the horizontal moving beam 64, and two cages 66 can be moved along the tunnel circumferential direction by a drive mechanism (not shown) on the swing frame 35. Therefore, the worker can ride the cage 66 to perform bolt fastening work between the existing segment S and the assembly segment S, or work to check the fastening state.

Further, in the shape retaining device 31, the pedestal 2
A movable table 67 is movably supported by a slide jack 68 along the longitudinal direction of the tunnel, and a pair of left and right expansion jacks 69 are mounted on the movable table 67. , 71 presses the inner wall surface of the existing segment S to correct the ring-shaped segment S into a predetermined shape and hold it.

In this case, the work scaffold 30 is moved back and forth by the erector device 29, the work scaffold 30, and the shape holding device 31, so that the erector device 29 can be positioned inside and outside the swing range. it can. Further, when the shape retaining device 31 moves back and forth, the two do not interfere with each other.

Here, the tunnel excavation work by the shield excavator having the above-described structure according to the present embodiment will be described.

As shown in FIG. 1, first, while rotating the cutter head 12 by the cutter turning motor 16, the plurality of shield jacks 23 are extended to press the spreader 24 against the existing segment S, and the reaction force of the spreader 24 causes the excavator body to move. Move 11 forward. Then, the cutter bit 13 of the cutter head 12 excavates the ground in front, and the excavated soil is taken into the chamber 19 and discharged from the mud pipe 21 to the outside, while the erector device 29 continuously assembles the segment S. To go.

The segment S formed by this erector device 29
In the assembling work, the hoist (not shown) conveys the segment S in a suspended state and mounts it on the uppermost surface of the existing segment S. The erector device 29 extends the slide jack 42 to move the moving body 33 rearward, retracts the holding grip 52 to the position shown by the chain double-dashed line, and positions it above the transported segment S. Here, the holding grip 52 is lowered to hold the segment S and then rises, the slide jack 42 is contracted to move the moving body 33 forward, and the holding grip 52 is moved forward and held to the position shown by the solid line. The segment S is moved to a predetermined position.
At this time, the holding grip 52 moves while holding the segment S, which is a heavy object, but the moving body 33 moves along the guide rail 32 while being supported by the supporting members 36, 37, 28 (see FIG. 3). You can move smoothly without rattling.

When the holding grip 52 holds the segment S and reaches the working position in this way, the turning motor 47 is driven to turn the turning ring 46, and the segment S held by the holding grip 52 is moved to a predetermined position in the tunnel. The segment S is moved to the assembling position and the elevating jack 53 is extended to assemble the segment S. Here, the operator rides the cage 66 to the vicinity of the assembled segment S to perform bolt fastening work between the existing segment S and the assembled segment S. At this time, in the moving body 33, as shown in FIG. 6, since the stopper jack 40 operates and the positioning pin 41 presses the positioning portion 39, the holding grip 52 properly holds the held segment S. Can be assembled with high precision.

Then, in the case of the taper-shaped key segment to be finally assembled, after the holding grip 52 holds the loaded key segment, it moves further forward than the working position shown by the solid line in FIG. By pivoting up and extending the slide jack 42 to move the key segment backward, the key segment is inserted between the existing segments, assembled, and bolted.

In this way, the erector device 29 of this embodiment is used.
The shield excavator equipped with the
A pedestal 28 is extended rearward from a support column 27 erected at the rear of the rear part of the pedestal 28.
And the shape holding device 31 are provided, and the erector device 29
At a guide rail 32 fixed to the gantry 28, a movable body 33 is movably supported by a slide jack 42 along the longitudinal direction of the tunnel, and a revolving ring 46 is rotatably supported by the movable body 33. A holding grip 52 is provided on the ring 46 so as to be able to move up and down.

Therefore, since the slide jack 42 for moving the moving body 33 is mounted on the frame 28 side,
The hydraulic unit of the slide jack 42 can be disposed on the excavator main body 11 side, and the holding grip 5 can be provided by mounting the hydraulic unit that requires a desired driving force.
2 can be moved at high speed, and the workability of the segment assembling work and the assembling accuracy can be improved. Further, it is not necessary to provide a hydraulic unit for moving the holding grip 52 in the longitudinal direction of the tunnel on the side of the turning ring, and it is possible to prevent the turning ring from increasing in size and weight. Further, the range of movement of the holding grip 52 is increased, and the holding grip 52 can directly hold the segment carried into the tunnel, so that the segment supply device is not required, and the size and weight of the device are reduced and the cost is reduced. be able to.

The moving body 33 is movably supported on the guide rail 32 via a pair of vertical supporting members 36, 37 and a horizontal supporting member 38, and a holding grip 52 holds a segment S which is a heavy object. However, the moving body 33 moves the guide rail 32 smoothly without rattling due to the supporting members 36, 37, 28.
Driving stability and safety can be improved.

Further, since the movable body 33 is in a predetermined working position, the stopper jack 40 is operated and the positioning pin 41 presses the positioning portion 39, so that the holding grip 52 smoothly swings and holds without rattling. The assembled segment S can be assembled properly, and the assembly accuracy of the segment S can be improved.

Although the tunnel excavator of the present invention has been described as a muddy water type shield excavator in the above embodiment,
A mud pressure type shield excavator may be used, and in this case, a screw conveyor may be used instead of the water pipe, the drain pipe, and the agitator. Furthermore, although the tunnel excavator of the present invention is described as a shield excavator, it can be applied to a tunnel boring machine.

[0041]

As described above in detail in the embodiment, according to the erector device of the invention of claim 1, a movable body is movably supported by the apparatus body along the longitudinal direction of the tunnel, and the movable body is supported by the movable body. A turning ring is rotatably supported along the circumferential direction of the tunnel, and a lifting body is movably supported by the turning ring along the tunnel radial direction, and a holding grip capable of holding a lining member is attached to the lifting body. Therefore, by mounting a drive source for moving the moving body on the apparatus main body side and securing a sufficient capacity thereof, it is possible to move the holding grip at high speed by mounting the drive source that requires a desired driving force. While it is possible to improve the workability and assembling accuracy of the lining member assembling work, the structure is simplified on the turning ring side, and it is possible to prevent an increase in size and weight, and to hold it. Move grip Enclosed by the securing large, it is possible to hold the lining member directly, it is possible to reduce the cost of the supply device of the lining member as required. As a result, excavation workability and reliability can be improved by controlling the propulsion speed of the tunnel excavator with high accuracy.

According to the erector device of the invention of claim 2,
Since the movable body is movably supported by the guide rail attached to the apparatus main body along the longitudinal direction of the tunnel, and the guide means for restricting the vertical and horizontal movement of the movable body with respect to the guide rail is provided, the holding grip is When the lining member, which is a heavy object, is held and moved, the guide rail can be smoothly moved without rattling, and traveling stability and safety can be improved.

According to the erector device of the invention of claim 3,
Since the movable body is movably supported by the guide rail attached to the apparatus main body along the longitudinal direction of the tunnel, and the positioning means for positioning the movable body at a predetermined position with respect to the guide rail is provided, the holding grip is removed. It is possible to properly assemble the lining member that is smoothly swung and held without sticking, and improve the assembly accuracy of the lining member.

According to the erector device of the invention of claim 4,
A pair of front and rear support rings are connected to the moving body, and a plurality of support rollers are pivotally mounted along the circumferential direction between the pair of support rings,
Since the swivel ring is rotatably supported by the plurality of support rollers along the circumferential direction of the tunnel, the swivel ring can be reliably supported and the assembling accuracy of the lining member can be improved.

According to the tunnel excavator of the fifth aspect of the present invention, the cutter head that can be driven and rotated is mounted on the front portion of the excavator body that can be moved forward by the propulsion jack, while the mount is mounted from the rear portion of the excavator body. An erector device that extends to the rear and attaches the lining member to the inner wall surface of the existing tunnel on this gantry, a shape holding device that presses against the inner peripheral surface of the existing lining member and holds it in a predetermined shape, and a work table. Since and are movably supported along the tunnel longitudinal direction, the eclectic device can be moved along the tunnel longitudinal direction.Therefore, its drive source should be mounted on the excavator main body side to secure sufficient capacity. In this way, it is possible to move at high speed by mounting a drive source that requires a desired drive force, and also to install the lining member in a short time without the erector device, shape retention device and workbench interfering with each other. It is possible, it is possible to improve the workability and assembling accuracy of assembly of the lining member. As a result, excavation workability and reliability can be improved by controlling the propulsion speed of the tunnel excavator with high accuracy.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a shield excavator equipped with an erector device according to an embodiment of the present invention.

FIG. 2 is a front view of an erector device.

FIG. 3 is a schematic diagram showing a support structure of a moving body in the erector device.

4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

[Explanation of symbols]

11 Excavator body 12 cutter head 16 cutter turning motor 23 Shield jack (propulsion jack) 28 mounts 29 Electa device 30 working scaffolds 31 Shape retention device 32 Guide rail 33 Mobile 36, 37 Vertical support member (guide means) 38 Horizontal support member (guide means) 39 Positioning unit (positioning means) 40 Stopper jack (positioning means) 41 Positioning pin (positioning means) 42 slide jack 46 swivel ring 47 swing motor 52 holding grip S segment

Claims (5)

[Claims] 1. In an erector device in which a lining member is assembled in a ring shape on an inner wall surface of an existing tunnel, a moving body supported by a device main body so as to be movable along a tunnel longitudinal direction,
A swivel ring rotatably supported by the moving body along the tunnel circumferential direction, an elevating body movably supported by the swivel ring along the tunnel radial direction, and a lining member attached to the elevating body. An erector device comprising a holding grip capable of holding 2. The erector device according to claim 1,
The moving body is movably supported along a tunnel longitudinal direction by a guide rail attached to the apparatus body,
An erector device comprising guide means for restricting vertical and horizontal movement of the moving body with respect to the guide rail. 3. The erector device according to claim 1,
The moving body is movably supported along a tunnel longitudinal direction by a guide rail attached to the apparatus body,
An erector device comprising a positioning means for positioning the moving body at a predetermined position with respect to the guide rail. 4. The erector device according to claim 1,
A pair of front and rear support rings are connected to the movable body, and a plurality of support rollers are pivotally mounted between the pair of support rings along the circumferential direction. The plurality of support rollers move the turning ring in the circumferential direction of the tunnel. An erector device characterized in that it is supported so as to be rotatable along it. 5. A tubular excavator body, a propulsion jack for advancing the excavator body, a cutter head rotatably mounted on a front portion of the excavator body, and a rear portion of the excavator body. A gantry that extends rearward, an erector device that is movably supported by the gantry along the longitudinal direction of the tunnel and assembles the lining member to the inner wall surface of the existing tunnel, and the gantry is movable along the tunnel longitudinal direction. A shape-retaining device that is supported on the inner surface of an existing lining member and holds it in a predetermined shape, and a tunnel longitudinal direction and a tunnel located between the erector device and the shape-retaining device. A tunnel excavator, comprising: a work platform supported so as to be movable along the circumferential direction.