JPH09132999A - Assembling construction method for segment covering and shield machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically continuously perform tunnel boring and segment assembling in the tunnel while an existing underground pipe in the ground is demolished. SOLUTION: A rotary cutter disc 3 which is provided on the front of a shield machine main body 1 having a cylidrical section and has an existing underground pipe entering hole 2 in the central part thereof is rotated to dig the periphery of the existing underground pipe 4. Simultaneously, a cutter 8 is moved in rotation intermittently to each angular position in the peripheral direction of the existing underground pipe 4 by a driving mechanism main body 7 comprising a first driving mechanism 5 provided in the shield machine main body 1 and a second driving mechanism 6 supporting the first driving mechanism 5 in such a manner as to freely rotate in the circumferential direction of the existing underground pipe 4, and then moved in the axial direction and in the direction right-angled to the axial direction in each angular position. Thus, with the part of the existing underground pipe 4 to be separately cut gripped by a demolished material gripping mechanism 10, at the base end of the existing underground pipe 4, a bent cut piece 11 of a designated size is separated, and corresponding to the development of demolishing the existing underground pipe 4, a segment ring 12 is assembled in the rear part of the shield machine main body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a segment lining and a shield machine, which is performed while removing an existing buried pipe in the ground.

[0002]

2. Description of the Related Art The existing buried pipe is removed due to deterioration of the buried pipe in the ground, and then a tunnel is excavated along the route of the existing buried pipe, and a new pipeline is constructed in the tunnel. The segments may be assembled sequentially. Conventionally, in this case, a groove having a depth reaching the buried pipe from the ground surface is excavated by a backhoe along the buried pipe, the buried pipe is dug up to the ground through the groove, and then the groove is backfilled. In this way, after removing the existing buried pipe from the ground, the tunnel is excavated while propelling the excavator along the route of the buried pipe, and the segment ring is assembled in the tunnel to complete the pipeline.

[0003]

Conventionally, in the above-mentioned case, since the work of removing the existing buried pipe and the work of excavating the tunnel are separate works, the existing buried pipe is removed and then the tunnel is excavated. There is a problem that it takes time to perform the work, and the construction period and construction cost increase.

[0004]

In order to solve the above problems, an assembly method for segment lining according to the present invention is provided in the front part of a shield machine main body 1 having a cylindrical cross section, and an existing buried pipe is provided in the center part. While rotating the rotary cutter disk 3 having the entrance hole 2, the periphery of the existing embedded pipe 4 is excavated, and the first drive mechanism 5 provided inside the shield machine body 1 is also provided.
The cutting cutter 8 is moved in the circumferential direction of the existing buried pipe 4 by the drive mechanism main body 7 including the second drive mechanism 6 that rotatably supports the first drive mechanism 5 in the circumferential direction of the existing buried pipe 4. Of the existing embedded pipe 4 at the base end portion of the existing embedded pipe 4 by intermittently rotating the angular displacement of the existing embedded pipe 4 to the axial direction and a direction perpendicular to the axial direction at each angular position. In the state where the disassembling part is grasped by the dismantling object grasping mechanism 10, the curved part 11 is separated as a curved cutting piece 11 of a predetermined size,
Corresponding to the progress of dismantling the existing buried pipe 4, the shield machine body 1
It is characterized in that the segment ring 12 is assembled at the rear part. Further, the shield machine according to the present invention has the entrance hole 2 of the existing buried pipe 4 at the center of the rotary cutter disk 3 provided at the front part of the shield machine body 1 having a cylindrical cross section, and the shield machine body 1 A drive mechanism main body 7 of the cutting cutter 8 is provided therein, and the drive mechanism main body 7 includes a second drive mechanism 6 for intermittently rotating the first drive mechanism 5 in the circumferential direction of the existing buried pipe 4 and a cutting cutter 8. At the respective angular positions in the circumferential direction of the existing embedded pipe 4, the first embedded drive pipe 5 is movably supported in the axial direction of the pipe and in the direction perpendicular to the axial line. The configuration is characterized in that a dismantling object gripping mechanism 10 having a gripping portion main body 13 that grips the cut-off portion of the embedded pipe 4 is provided. The second drive mechanism 6 is a guide rail 1 movably supported in a front-rear direction in the tunnel by a drive device 14 via a rack 27 and a pinion 28 on a support carriage 15 provided in the tunnel.
It is preferable that the first drive mechanism 5 is attached to the tip of 6 and the first drive mechanism 5 is composed of a rotary cylinder 17, and the cutting cutter 8 is attached to the rotary shaft of the rotary cylinder 17. The dismantled object gripping mechanism 10 includes a pinion 2 driven by a drive device 18 in the shield machine main body 1.
0, a movable support frame which is attached to an annular frame 22 for pivoting a grip body, which is rotatably supported via an annular gear 21, and is movably provided in a radial direction of an existing buried pipe 4 by a driving fluid pressure cylinder 23. 24 and this movable support frame 24
The grip portion main body 13 is supported by the grip portion main body 13 and is movably provided in parallel with the axis of the existing buried pipe 4 by the grip portion main body rotating annular frame 22. Further, it is preferable that the traveling hoist 26 is provided on the traveling vehicle 25 that can travel along the guide rail 16 and that the curved cutting piece 11 grasped by the grasping body 13 can be lifted by the conveying hoist 26.

According to the present invention, the cutting face around the existing buried pipe 4 is excavated by the rotation of the rotary cutter disk 3 at the front end of the shield machine body 1, and the existing buried pipe 4 is cut by the cutting cutter 8 in the shield machine body 1. The steps of disassembling the base end portion and assembling the segment ring 12 at the rear portion of the shield machine body 1 can be continuously and automatically performed.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described in detail with reference to the examples shown in the drawings. 1 to 3, the shield machine main body 1 having a tubular cross section of the shield machine 31 has an entrance hole 2 for the existing buried pipe 4 in the center, and a large number of cutter bits 32 on the outer periphery thereof. A rotary cutter disk 3 mounted radially is provided.

The rotary cutter disk 3 is arranged at the front part of the shield machine body 1 as described above, and the annular support member 33 is fixed to the shield machine body 1 at the rear part of the rotary cutter disk 3. The annular support member 3
The annular driven gear 35 disposed inside the support member 3 is
3 is rotatably fitted in an annular groove provided in a partition wall 36, which is fixed to the inside of the partition wall, via a bearing, and the annular driven gear 35 of the connecting ring 34 is rotatably fitted in the partition wall 36. The rotary cutter is fixed to the rear end, and the front end of the connecting ring 34 and the rear part of the rotary cutter disk 3 are connected via a number of connecting members 37 arranged at intervals in the peripheral direction of the connecting ring, and the rotary cutter is also provided. On the inner surface of the peripheral wall 29 of the existing buried pipe entrance hole 2 at the center of the disc 3, an inner peripheral cutter bit 32a for excavating the outer peripheral portion of the existing buried pipe 4 is formed.
Is provided.

Around the inner side of the annular support member 33, a large number of cutter disk rotation driving devices 38, which are hydraulic motors, are arranged.
The pinion 40, which is fixed to No. 6 and fixed to the rotation shaft of the drive unit 38, is meshed with the annular driven gear 35, and the rotary cutter disc 3 is rotated by the drive unit 38. A tubular guide 41 is provided at an inner end of the partition wall 36 arranged in parallel with a space in the front-rear direction, and an annular rubber seal 42 is attached to an inner periphery thereof, and the existing buried pipe 4 is attached via the annular rubber seal 42. Can enter the rear of the shield machine body 1 through the inside of the cylindrical guide 41.

Further, the opening of the front end of the mud pipe 43 is introduced in front of the front partition wall 36 through the hole formed in the partition wall 36. Similarly, the front end opening of the sludge discharge pipe 45 is guided in front of the front partition wall 36 through the hole of the partition wall 36.

A large number of shield jacks 46 arranged behind the support member 33 are inserted and fixed to an annular holding member 47 fixed to the shield machine main body 1. Reference numeral 48 is a jack for controlling the direction of the shield machine. Further, on the rear side of the annular holding member 47, the guide groove 49 is formed in the shield machine main body 1.
And a ring-shaped rotary member 50 is rotatably supported in the guide groove 49, and a drive unit attached to the ring-shaped holding member 47 is attached to a ring-shaped gear 51 provided on one side of the ring-shaped rotary member 50. The pinion 53 of 52 meshes with each other, and the erector 54 for mounting the segment 12 a is attached to the annular rotating member 50 via the drive mechanism 55.

In FIG. 1, the excavation reaction force is applied to the rear segment ring 12, and the shield machine body 1 is advanced by the shield jack 46, while the rotary cutter disk 3 at the tip of the shield ring face 57 around the existing buried pipe 4. Is excavated and the segment ring 12 is assembled by the erector 54 behind the shield machine body 1.

At this time, the base end of the existing buried pipe 4 is
It has entered the shield machine body 1 through the buried pipe entry hole 2 in the center of the rotary cutter disk 3, and corresponds to the forward movement of the shield machine body 1 (that is, the progress of excavation by the rotary cutter disk 3). , A first drive mechanism 5 and a second drive mechanism 6 supporting the first drive mechanism 5 in the shield machine main body 1 so as to sequentially dismantle the base end of the existing buried pipe 4 and discharge it to the rear of the tunnel. A cutting cutter 8 operated by the drive mechanism body 7 is provided.

In the embodiment of the first invention, the cutting cutter 8 has a high-pressure water jet nozzle 58 at the tip, and a cutting system by jetting ultra-high-pressure water containing fine abrasive particles from the jet nozzle 58. This cutting cutter 8 is moved by the drive mechanism main body 7 on the inner surface of the base end portion of the existing buried pipe 4 in the axial direction of the existing buried pipe 4 and in the direction orthogonal to the axial direction. The existing buried pipe 4 is cut into a plurality of curved cutting pieces 11 with a predetermined width.

The first drive mechanism 5 for causing the cutting cutter 8 to perform the above operation, the second drive mechanism 6, and the curved cutting piece 11 so as not to drop when the existing embedded pipe 4 is cut by the cutting cutter 8. The disassembly object gripping mechanism 10 for gripping will be described in order.

First, as one member constituting the second drive mechanism 6, a support carriage 15 is provided behind the shield machine main body 1. The wheels 56 of the support carriage 15 are movably provided along a traveling rail 60 arranged in the front-rear direction of the tunnel 59. This traveling rail 60 is used for the tunnel 5
A support frame 61 is provided laterally in the frame 9 and is provided at a predetermined height position.

The support carriage 15 supports the rear portion of the guide rail 16 extending in the front-rear direction in the tunnel 59 so as to be slidable in the front-rear direction. The guide rail 16 has a configuration in which large and small I-shaped steels are vertically joined as shown in cross section in FIGS. 5 and 6, and is assembled in a square shape inside an annular frame 22 and an annular holding member 47 described later. The support roller 65 of the weft rod 64 extending in the front-rear direction inside the vertical frame 62 and the horizontal frame 63 and the inner side of the annular rotary member 50 is provided. The support roller 6 is rotatably in contact with the lower surface of the upper flange 66 of the guide rail 16.
5, the front portion of the guide rail 16 is movably supported in the front-rear direction by the monorail method.

A rack 27 is formed on the rear upper surface of the upper brim 66 of the guide rail 16, and the rack 27 is provided on the support carriage 15 and the pinion 28 of the drive unit 14 is provided.
The guide rail 16 can move in the front-back direction of the tunnel 59 via the pinion 28 and the rack 27 by driving the drive device 14. The rear portion of the guide rail 16 is supported by the guide roller 67 of the support carriage 15 and extends rearward through the inner space.

The tip of the guide rail 16 extends inward of the base end portion of the existing buried pipe 4, and at the inner position of the existing buried pipe 4, the guide rail tip portion 16a has a drive source for the first drive mechanism 5. The rotary cylinder 17 is fixed in the axial direction of the tunnel, and the cutter 8 is cut in the direction perpendicular to the axis of the rotary cylinder 17 via the holder 68 on the rotary shaft.
The cylindrical support portion 69 is held, and the high-pressure water jet nozzle 58 of the cutting cutter 8 is installed toward the inner wall surface of the existing buried pipe 4. An ultra-high pressure water supply hose 70 is connected to the base end of the tubular support 69.

In the above construction, the rotary cylinder 17
The axis line of is provided at a position that matches the axis line of the existing buried pipe 4. Therefore, by driving the rotary cylinder 17, the cutting cutter 8 can be rotated 360 ° about the axis of the existing buried pipe 4 which is the center of rotation thereof, and at this time, the inner peripheral wall 4a of the existing buried pipe 4 is completely circumferentially rotated. It can be cut over the circumference.

Further, at this time, the cylindrical shape of the cutting cutter 8 is arranged so that the tips of the high-pressure water jet nozzles 58 of the cutting cutter 8 can be positioned at appropriate intervals toward the inner wall surfaces of various existing buried pipes 4 having different inner diameters. The support part 69 is movably held by the holding body 68, and the plunger 72 of the nozzle position adjusting cylinder 71 attached to the holding body 68 is connected to the connecting fitting 7.
It is connected to the cylindrical support portion 69 via 3. Therefore, the nozzle position adjusting cylinder 71 is driven to move the high-pressure water jet nozzle 58 of the cutting cutter 8 in the radial direction of the existing buried pipe 4, and the optimum cutting state by the ultra-high-pressure water jetted from the high-pressure water jet nozzle 58 is obtained. Can be set to always be retained.

The cutting cutter 8 held by the first drive mechanism 5 and the second drive mechanism 6 moves the guide rail 16 of the second drive mechanism 6 forward to move the high-pressure water jet nozzle 5
While moving super high pressure water from 8 while moving in the axial direction of the existing buried pipe 4, a cut line having a constant length is made in the existing buried pipe 4 from its base end in the axial direction.

Subsequently, the rotary cylinder 17 of the first drive mechanism 5 is driven to drive the high pressure water jet nozzle 5 of the cutting cutter 8.
8 in the circumferential direction of the existing buried pipe 4 at a predetermined angle (for example, 30
°) Rotate and make a score line in the circumferential direction of the existing buried pipe 4.

Then, again, the guide rail 16 of the second drive mechanism 6 is moved backward so that the cutting cutter 8 is moved forward in the axial direction of the existing buried pipe 4 while jetting the ultra high pressure water from the high pressure water jet nozzle 58. Then, a cut line having a predetermined length is formed in the existing buried pipe 4 in the proximal direction.

A substantially U-shaped cut line is formed in the pipe wall at the base end of the existing buried pipe 4 by moving the cutting cutter 8 in the three directions of forward movement → turning → backward movement inside the existing buried pipe 4. The inside surrounded by the cut line can be cut out from the existing buried pipe 4 as the curved cutting piece 11.

Then, the curved cutting piece 1 in which the movement of the cutting cutter 8 in the three directions of forward-turning-backward is defined as one cycle
By repeating the cutting operation of 1 at each angular position of 360 ° in the circumferential direction of the existing buried pipe 4, the existing buried pipe 4 is removed.
Can be cut and disassembled into a ring shape having a predetermined width.

When the curved cutting piece 11 is cut off by the cutting cutter 8, the curved cutting piece 11 is dropped by holding the portion where the curved cutting piece 11 is cut off by the dismantling object holding mechanism 10. Instead, it is configured to make a smooth cut.

The gripping part main body 13 of the dismantling object gripping mechanism 10 can move in the axial direction and the circumferential direction of the existing buried pipe 4 while gripping the curved cutting piece 11. Therefore, as shown in FIG. 5, the grip portion main body 13 is provided with a movable support frame 2 provided so as to rotate integrally with the grip portion main body turning annular frame 22.
4, the plunger 3 of the fluid pressure cylinder 23 for driving the grip body, which is held parallel to the axis of the existing buried pipe 4.
It is provided at the tip of 0.

As shown in FIGS. 1, 5 and 7 to 8, a pair of guide rods 75 parallel to the tip of the plunger 30 of the driving fluid pressure cylinder 23 are provided on the support 74 of the grip body 13. The ends are fixed. Guide rod 7
Reference numeral 5 is slidably inserted into a tubular guide 76 fixed to the lower portion of the movable support frame 24 with the driving fluid pressure cylinder 23 interposed therebetween.

Two pairs of upper and lower rotating arms 78 are pivotally supported in parallel on the support body 74 by a pivot shaft 77, and an elastic body is attached to the tip of the rotating arm 78 on the holding surface thereof. The holding plate 79 formed by the above is fixed. Further, the support 74 is provided with a fluid pressure cylinder 80 for driving a rotating arm, and the base end of the one rotating arm 78 is pivotally attached to one end of the fluid pressure cylinder 80 via a connecting shaft 81. And
Further, the base end of the other rotating arm 78 is pivotally attached to the tip of the plunger 83 via a connecting shaft 82.

Therefore, the plunger 83 of the driving fluid pressure cylinder 80 is expanded and contracted to rotate the pair of upper and lower rotating arms 78 about the pivot 77 as a fulcrum, so that the holding plate 79 at the tip of the rotating arm 78 allows the existing buried pipe 4 to move. The curved cutting piece 11 can be clamped.

An annular frame 22 for turning the grip body 13
As shown in FIGS. 4 and 6, an annular guide groove 84 and an annular gear 21 are provided in the annular guide groove 84, and the annular guide groove 84 has a plurality of guide rollers 85 attached to the weft frame 63.
Are rotatably fitted, so that the turning annular frame 22 is rotatably supported in the shield machine main body 1. The pinion 20 of the drive device 18 fixed to the vertical frame 62 meshes with the annular gear 21, and the drive device 18 can smoothly rotate and drive the rotating annular frame 22 supported by the guide roller 85. You can

As shown in FIGS. 4 and 6, the bracket 8 is provided at both symmetrical positions on the front peripheral surface of the turning annular frame 22.
6 is fixed, and a cylindrical guide 87 is fixed to the tip of this bracket, and a guide shaft 88 that rises vertically from both ends of the movable support frame 24 whose front surface is substantially the bottom of the ship slides on this cylindrical guide 87. It is freely inserted. A driving fluid pressure cylinder 93 is fixed to the side surface of the cylindrical guide 87 in a downward direction, and a tip end of a plunger 89 thereof is connected to an end portion of the movable support frame 24 by a connecting shaft 90.

As described above, at the lower end of the movable support frame 24, there are two cylindrical guides 76 slidably fitted with two parallel guide rods 75 extending rearward integrally from the grip body 13. A fluid pressure cylinder 23 for driving the grip portion main body is fixed to the lower end of the movable support frame 24 in the middle of the two cylindrical guides 76 provided in parallel.

With the above construction, the fluid pressure cylinder 93 is driven and the plunger 89 of the fluid pressure cylinder 93 is extended while the grasping portion body 13 is grasping the cut curved cutting piece 11, whereby the grasping portion body 13 is extended. The curved cutting piece 11 gripped by is moved outward (downward in the case of FIGS. 1 and 4) from the tubular body position of the existing embedded pipe 4 through the cut line.

Subsequently, the fluid pressure cylinder 23 for driving the grip portion main body is driven to contract the plunger 30 to move the curved cutting piece 11 gripped by the grip portion main body 13 rearward in the tunnel by a predetermined distance. A transport hoist 26 stands by above the curved cutting piece 11 that has moved backward, and the curved hoist 26 lifts the curved cutting piece 11 and conveys the curved cutting piece 11 backward in the tunnel.

A transport mechanism 91 including the transport hoist 26.
The transport hoist 26 is suspended from the transport carriage 92. The transport carriage 92 has a drive device (not shown) and traveling wheels 94, and the traveling wheels 94 can travel in the front-rear direction in the tunnel along the lower brim edge 95 of the guide rail 16.

The transport hoist 26 lifts and transports the curved cutting piece 11, and therefore, on the curved inner surface of the curved cutting piece 11 before the cutting operation with the cutting cutter 8.
The hook bolt 96 (shown in FIG. 13) is embedded in advance, and when the curved cutting piece 11 is hoisted by the transport hoist 26, the hook 98 of the hoisting wire 97 is hooked on the hook bolt 96 and hoisted.

In place of the hook bolt 96,
It is also possible to tie the curved cutting piece 11 with a string and hang it by hooking the hook 98 on the string (not shown).

The transport hoist 25 on which the curved cutting pieces 11 are suspended moves to the rear of the tunnel along the guide rails 16. At this time, the gripping part main body turning annular support frame 22, the annular holding member 47, and Since the erector-rotating annular rotating member 50 and the supporting carriage 15 pass through the respective inner spaces and move rearward, these members and the curved cutting piece 11 are provided in an arrangement relationship so as not to collide with each other. .

Next, the overall operation will be described in order with reference to FIGS. 1. After the rotary cutter disk 3 has performed a predetermined excavation, the grip body driving hydraulic cylinder 23 is driven to move the grip body 13 forward, and the rotating arm driving fluid cylinder 80 is driven. The part of the existing buried pipe 4 to be cut is clamped. 2. Drive the drive unit 14, and rack 27, pinion 28
The guide rail 16 is advanced through the meshing of the above, and a cutting line of a predetermined length is inserted in the axial direction from the base end portion of the inner surface of the existing buried pipe 4 by the cutting cutter 8 using ultra-high pressure water. 3. Drive the rotating cylinder 17 to cut the cutter 8.
Is swung in the circumferential direction on the inner surface of the existing buried pipe 4 by a predetermined angle, and a cutting line is inserted at a right angle to the cutting line in. 4. The guide rail 16 is retracted, and the cutting cutter 8 cuts the curved cutting piece 11 from the pipe main body of the existing buried pipe 4 by inserting a cutting line parallel to the cutting line at the inner surface proximal end of the existing buried pipe 4. (Note that the curved cutting piece 11
The hook bolt 96 is embedded in the curved inner surface of the. 5. The fluid pressure cylinder 93 is extended to move the movable support frame 24, and the curved cutting piece 11 gripped by the grip body 13 is moved to the outside of the pipe body of the existing buried pipe 4. 6. When the cutting portion of the curved cutting piece 11 is at the lowermost end of the existing buried pipe 4, the fluid pressure cylinder 23 for driving the gripping part main body is contracted at that position to convey the curved cutting piece 11 to the transport hoist 2
Move below 6. Further, the cutting position of the curved cutting piece 11 is other than the lowermost position of the existing buried pipe 4 (for example, above).
In this case, the turning drive device 18 is driven to turn the gripping part body turning annular frame 22, and the gripping part body 13 attached thereto is once moved downward (that is, the position of FIG. 1), The driving fluid pressure cylinder 23 is contracted, and the curved cutting piece 11 is moved below the transport hoist 26. 7. Pull down the hoisting wire 97 of the transport hoist 26 to hook the hook 98 on the hook bolt 96 of the curved cutting piece 11. 8. Drive the rotating arm drive fluid pressure cylinder 80 to remove the grip body 13 from the curved cutting piece 11, and drive the grip body drive fluid cylinder 23 to contract to bend the grip body 13. It is separated from the cutting piece 11. 9. The winding wire 97 of the transport hoist 26 is wound to lift the curved cutting piece 11 to a predetermined height. 10. The transport carriage 92 is moved backward along the guide rail 16 to move the transport hoist 26 to the position indicated by the chain double-dashed line in FIG. 11. Pull down the hoisting wire 97 of the transport hoist 26 to wait for the tow rope 9 at the rear of the traveling rail 60.
The curved cutting piece 11 is put on the top of the sheet 9. 12. The transport hoist 26 is again advanced along the guide rail 16 and is made to stand by at the tip position. 13. The first drive mechanism 5 and the second drive mechanism 6 of the guide rail 16 are driven again to cause the cutting cutter 8 to perform the operations 1 to 4, and the grip body 13 and the transport carriage 92 to 5. ~ 12.
The above operation is repeated, and by repeating the operation, the existing buried pipe 4 is divided into a plurality of pieces in the circumferential direction and sequentially disassembled as arcuate curved cutting pieces 11 and discharged to the rear of the tunnel.

For example, the existing buried pipe 4 with a predetermined width,
Further, if the entire circumference is divided into 12 pieces and disassembled, one curved cutting piece 11 is separated as curved cutting pieces of 30 °. At this time, as described above, since the turning center of the cutting cutter 8 and the turning center of the grip body 13 coincide with the central axis of the existing buried pipe 4, the entire circumference of the existing buried pipe 4,
The curved cutting pieces 11 can be cut out smoothly at any angular position. 14. On the other hand, if the base end of the existing buried pipe 4 is disassembled into an annular shape over a predetermined width by the above operation, the segment 12a is assembled into a ring by operating the erector 54 in the rear part of the shield machine body 1. Lining up. 15. As the dismantling of the existing buried pipe 4 and the assembly of the segment 12a proceed, the shield machine body 1 is advanced by the shield jack 46, and the face face 57 around the existing buried pipe 4 is excavated by the rotary cutter disk 3.

With the advance of the shield machine main body 1, the respective members attached thereto move forward together, and the position where the curved cutting piece 11 is to be cut by the cutting cutter 8 also moves forward. The length of the guide rail 16 is constant.

Therefore, the guide rail 16 itself is moved forward, and the rack 27 of the guide rail 16 is meshed with the pinion 28 accordingly.
Carrier 1 equipped with a drive device 14 for moving the vehicle forward and backward
It is necessary to move 5 itself forward.

Therefore, as shown in FIG. 13, the unit rails 60a are sequentially added to the front ends of the traveling rails 60 as the shield excavation proceeds, and the traveling rails 60 are connected.
Can be sequentially extended forward in the tunnel, and the support carriage 15 can be moved forward along the extended traveling rail 60, whereby the guide rail 16 can be moved forward and the proper supporting state can be maintained. .

The means for moving the support carriage 15 forward is arbitrary, but in the present invention, the tow rope 99 having one end locked to the support carriage 15 is extended forward and is held in an annular shape as shown by the chain double-dashed line in FIG. By pulling the tow rope 99 on the vertical frame 62 inside the member 47 and pulling the other end of the tow rope 99 by taking a reaction force to the vertical frame 62, the support cart 15 is moved forward along the traveling rail 60. It is provided to do.

As described above, the steps 1 to 15 are repeated in sequence to excavate the periphery of the existing buried pipe 4 at the tip of the shield machine body 1 while the base end of the existing buried pipe 4 inside the shield machine body 1 is being excavated. The parts are sequentially disassembled and discharged from the tunnel, and the segment ring 12 is further provided at the rear part of the shield machine body 1.
You can progress the shield digging while assembling.

FIG. 10 shows a second embodiment of the present invention. In this second embodiment, a rotating disk is used instead of the cutting cutter 8 using the ultra-high pressure water in the embodiment of the first invention. A cutting cutter 8a including the cutter 100 is used.

In the embodiment of the second aspect of the invention, when the cutting cutter 8a separates the curved cutting piece 11 from the existing buried pipe 4, it is necessary to change the direction at the corner of the substantially U-shaped cutting line. In this cutting cutter 8a, a swiveling fluid pressure cylinder 102 is provided at the lower end of a guide rod 101, and a swivel plunger 103 is attached with a holding frame 104 of a rotary disc cutter 100. A drive device 106 is connected to the shaft 105 of the rotary disc cutter 100.

The guide rod 101 is held by a holding member 68 provided on the plunger of the rotating fluid pressure cylinder 17, and the plunger 72 of the cutter position adjusting cylinder 71 held by the holding member 68 is connected to a connecting fitting. 7
It is provided at the lower end of the guide rod 101 via the guide rod 3.

Therefore, the cutter 71 for adjusting the cutter position is driven to move the cutting cutter 8a in the radial direction of the existing buried pipe 4, and the rotary disk cutter 100 cuts the existing buried pipe 4 as shown in FIG. Further, when the curved cutting piece 11 is cut into a substantially U-shape to be cut off, the movement of the linear portion in the axial direction and the circumferential direction of the curved cutting piece 11 is caused by the guide in the second drive mechanism 6 as in the embodiment of the first invention. Curved cutting by the rotating disk cutter 100 is performed by moving the rail 16 and rotating the rotating fluid pressure cylinder 17 in the first drive mechanism 5, and changing the direction at the corners by the rotating fluid pressure cylinder 102. The pieces 11 can be smoothly separated. FIG.
Since the other configurations in are the same as those of the first embodiment, the same elements as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

11 and 12 show a third embodiment of the present invention, in which the inner periphery 2a of the existing buried pipe entry hole 2 of the rotary cutter disk 3 at the tip of the shield machine body 1 is
An example in which a plurality of rollers 107 are arranged is shown. When the existing buried pipe 4 enters the entry hole 2, the roller 107 does not have a large resistance as it slightly contacts the outer circumference of the pipe,
On the other hand, when propelling the tunnel, it is advisable to provide the arrangement so that the outer circumference of the existing buried pipe 4 can be appropriately contacted to guide the rotary cutter disk 3. Since other configurations are the same as those of the first embodiment, the same elements as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

[0052]

As described above, according to the present invention,
A step of excavating the surroundings of the existing buried pipe 4 at the tip of the shield machine body 1, a step of sequentially disassembling the base end portion of the existing buried pipe 4 in the shield machine body 1, and a segment ring 12 at the rear part of the shield machine body 1. Since the steps of assembling and lining can be performed automatically and continuously, there is an excellent effect that the existing buried pipe 4 can be disassembled and a new pipeline can be constructed in a quick operation.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of a shield machine according to an embodiment of the first invention.

FIG. 2 is an enlarged view of a front end portion of the shield machine body in FIG.

FIG. 3 is a left side view of FIG.

FIG. 4 is an enlarged view of a cut portion of the existing buried pipe in FIG.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is a sectional view taken along line CC of FIG. 4;

8 is a cross-sectional view taken along the line C-C in FIG. 4 and at a position where the gripping unit body grips the curved cutting piece and retracts.

9 is a diagram as viewed in the direction of the line D-D in FIG. 4.

FIG. 10 is an enlarged view of a cutting portion of an existing buried pipe according to the embodiment of the second invention.

FIG. 11 is an enlarged cross-sectional view of the front end portion of the shield machine body showing an example in which a guide roller is used instead of the inner peripheral cutter bit of the rotary cutter disk in FIG. 1 as an embodiment of the third invention.

FIG. 12 is a left side view of FIG. 11;

FIG. 13 is a side view for explaining the operation procedure of the construction method according to the present invention.

[Explanation of symbols]

 1 shield machine main body 2 existing buried pipe entry hole 3 rotary cutter disk 4 existing buried pipe 5 first drive mechanism 6 second drive mechanism 7 drive mechanism main body 8 cutting cutter 10 dismantled object gripping mechanism 11 curved cutting piece 12 segment ring 13 gripping portion Main body 14 Drive device 15 Support cart 16 Guide rail 17 Fluid cylinder for rotation 18 Drive device 20 Pinion 21 Annular gear 22 Ring frame for gripping body main body 23 Drive fluid pressure cylinder 24 Movable support frame 25 Travel vehicle 26 Transfer hoist 27 Rack 28 Pinion 30 Plunger 31 Shield Excavator 32 Cutter Bit 33 Annular Support Member 34 Connecting Ring 35 Annular Driven Gear 36 Partition Wall 37 Connecting Member 38 Drive Unit 40 Pinion 41 Cylindrical Guide 42 Annular Rubber Seal 43 Mud Pipe 45 Drain Pipe 46 Sea Dojack 47 Annular holding member 48 Directional control jack 49 Guide groove 50 Annular rotating member 51 Annular gear 52 Drive device 53 Pinion 54 Elector 55 Drive mechanism 56 Wheel 57 Face face 58 High pressure water jet nozzle 59 Tunnel 60 Traveling rail 61 Support frame 62 Lifting frame 63 Horizontal frame 64 Horizontal rod 65 Support roller 66 Upper flange 67 Guide roller 68 Holding body 69 Cylindrical support portion 70 Ultra high pressure water supply hose 71 Nozzle position adjusting cylinder 72 Plunger 73 Connecting metal fitting 74 Supporting body 75 Guide rod 76 Cylindrical guide 77 Pivot 78 78 Rotating arm 79 Clamping plate 80 Fluid arm cylinder for driving rotating arm 81 Connecting shaft 82 Connecting shaft 83 Plunger 84 Annular guide groove 85 Guide roller 86 Bracket 87 Cylindrical guide 88 Guide shaft 89 Plunger 90 Connection shaft 91 Conveying mechanism 92 Conveying carriage 93 Driving fluid pressure cylinder 94 Traveling wheel 95 Lower brim 96 Hook bolt 97 Winding wire 98 Hook 99 Traction rope 100 Rotating disc cutter 101 Guide rod 102 Fluid cylinder for swiveling 103 Swivel plunger 104 Holding Frame 105 Shaft 106 Drive device 107 Roller

Claims (5)

[Claims] 1. While excavating the periphery of an existing buried pipe 4 while rotating a rotary cutter disk 3 provided in the front part of a shield machine main body 1 having a cylindrical cross section and having an existing buried pipe entrance hole 2 in the center thereof. A drive mechanism body including a first drive mechanism 5 provided inside the shield machine body 1 and a second drive mechanism 6 that rotatably supports the first drive mechanism 5 in the circumferential direction of the existing buried pipe 4. The cutting cutter 8 is intermittently rotationally moved to each angular position in the circumferential direction of the existing buried pipe 4 by 7, and is moved in the axial direction and the direction at right angles to the axial direction at each angular position. At the base end portion of the pipe 4, a curved cut piece 11 of a predetermined size is formed in a state where the cut-off portion of the existing buried pipe 4 is held by the dismantling object holding mechanism 10.
The segment lining assembly method is characterized in that the segment ring 12 is assembled at the rear part of the shield machine main body 1 in accordance with the progress of the dismantling of the existing buried pipe 4 as described above. 2. A shield cutter main body 1 having a cylindrical cross section has a rotary cutter disk 3 provided at a front portion thereof with an entry hole 2 for an existing buried pipe 4 in the center thereof, and a shield cutter 8 is provided in the shield machine main body 1. The drive mechanism body 7 is provided, and the drive mechanism body 7 is
The second drive mechanism 6 for intermittently rotating the first drive mechanism 5 in the circumferential direction of the existing buried pipe 4, and the cutting cutter 8 at each angular position in the circumferential direction of the existing buried pipe 4, in the pipe axis direction, and The first support movably supported in a direction perpendicular to the axis
And a driving mechanism 5, and further, a disassembly object gripping mechanism 10 having a gripping body 13 for gripping a portion to be cut of the existing buried pipe 4 by the cutting cutter 8 is provided in the shield machine main body 1. And a shield machine. 3. The second drive mechanism 6 is provided at a tip end of a guide rail 16 movably supported in a front and rear direction in the tunnel by a drive unit 14 on a support carriage 15 provided in the tunnel via a rack and a pinion. The first drive mechanism 5 is attached to the rotary cylinder 1.
7. The shield machine according to claim 2, wherein the cutting cutter 8 is attached to the rotary shaft of a rotary cylinder 17. 4. The dismantled object gripping mechanism 10 includes a pinion 20 driven by a drive device 18 in the shield machine body 1.
A movable support frame 24, which is attached to an annular frame 22 for rotating the grip body, which is rotatably supported via an annular gear 21, and is movably provided in the radial direction of the existing embedded pipe 4 by a driving fluid pressure cylinder 23. 3. The grip portion main body 13 supported by the movable support frame 24 and movably provided in parallel with the axis of the existing buried pipe 4 by the grip portion main body turning annular frame 22. The shield machine described in. 5. A traveling hoist 26 is provided on a traveling vehicle 25 which can travel along the guide rails 16, and the curved cutting piece 11 grasped by the grasping body 13 is lifted by the conveying hoist 26. The shield machine according to claim 2, having a certain configuration.