JPH05163892A - Existing pipeline dismantling method - Google Patents

Abstract

PURPOSE:To dismantle an existing pipeline and make back-fill in good operating performance by handling 3 ruptured segment and a secondary covering as a large lump. CONSTITUTION:A segment 101a and a secondary covering 102 are torn off by a core cutter. Holes 10Ca, 100a' are formed, and a joint bolt of the segment 101a is removed. A wedge receptacle 74 is fitted in the holes 100a, 100a'. In a tapered hole 74a in this wedge receptacle 74, a edge 73 is fitted by pressure with the aid of a jack 71 for pressing and a cam 72. Members 74A, 74B of the wedge receptacle 74 separate, and the segment 101a and secondary covering 102 are pressed. The segments 101a and secondary covering 102 are ruptured in a single piece.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an existing pipeline (tunnel).
The present invention relates to a method for dismantling an existing pipeline, which can favorably dismantle the existing pipeline at the time of backfilling.

[0002]

[Prior Art] When underground development is not very advanced,
When constructing a new pipeline, it is unlikely that another existing pipeline will be an obstacle.

[0003]

However, as underground development progresses, the existence of existing pipelines may be an obstacle when constructing new pipelines. Such existing pipelines should be dismantled. The need arises.

In view of the above circumstances, it is an object of the present invention to provide a method for dismantling an existing pipeline, which can dismantle the existing pipeline appropriately.

[0005]

The present invention provides a joint member (1
When disassembling the existing pipeline (100) constructed by a plurality of segments (101a) connected to each other via 01b), the segment (101a) is hollowed out by a piercing means (59), and The joint member (101b) is removed or cut in the form of forming holes (100a, 100a ') in 101a), and the punching means (59) is provided by pressing means (73, 74).
The segment (101a) is configured to be broken by expanding the holes (100a, 100a ') formed by.

The numbers in parentheses () indicate the corresponding elements in the drawings for the sake of convenience, and therefore the present description is not limited to the description in the drawings. The same applies to the column of "action" below.

[0007]

With the above structure, the predetermined segment (10
1a) acts to break from the adjacent segment (101a).

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a state in which an existing pipeline is dismantled and backfilled by a replace shield machine, FIG. 2 is a view of a cutter of the replace shield machine shown in FIG.
FIG. 4 is an enlarged view of the replace shield machine shown in FIG. 1, FIG. 4 is an enlarged view of the core removing device of the replace shield machine shown in FIG. FIG. 7 is a perspective view showing an operating mechanism of the segment breaking device shown in FIG. 5, and FIG. 7 is a development view showing a joint portion of a segment of an existing pipeline.

An existing pipeline 100 (tunnel) to be disassembled and backfilled is, as shown in FIG. 1 or 2, a cylindrical primary lining 101 and a secondary lining 102 (concrete) formed inside thereof. ), It is constructed in the form of extending in the left-right direction in FIG. The primary lining 101, as shown in FIG.
A plurality of arc-shaped segments 101a are arranged in the front-back direction (see FIG.
In the form of a cylindrical assembly in the pipe line direction perpendicular to the paper surface and in the circumferential direction (ring direction perpendicular to the pipe line direction),
Has been built. That is, in one segment 101a, as shown in FIG. 7, two bolt portions BP are provided at both ends in the circumferential direction (vertical direction in FIG. 7), respectively.
Four bolt portions BP ′ are provided at both ends in the front-rear direction (left-right direction in FIG. 7). The segment 101a is connected to the adjacent segment 101a via the joint bolt 101b at each bolt portion BP, BP '. In FIG. 7, the bolts BP and BP ′ at the upper end and the right end in the figure are hollowed out together with the joint bolt 101b to form holes 100a and 100a ′, and the segment 101a existing on the right side in the figure. Indicates that it has already been removed. It should be noted that the existing pipeline 1 for dismantling and backfilling
00 may be constructed only by the primary lining 101 (segment 101a) (that is, the secondary lining 102 may not necessarily be formed). Further, the number of bolt portions BP and BP 'of each segment 101a does not necessarily have to be two and four.

As shown in FIG. 3, the replace shield machine 1 has a front outer shell (skin plate) 3 and a rear outer shell 6, and the front outer shell 3 and the rear outer shell 6 have the same radius. It is formed in a cylindrical shape. Then, the front outer shell 3 and the rear outer shell 6
Is indicated by an arrow A through a plurality of re-starting jacks 10 (hydraulic jacks and the like) (the same number as propulsion jacks 11 described later).
They are connected to each other in the front-rear direction so as to be relatively movable and driven in the + and A-directions (front-rear direction) and in close contact with each other via the sealing device 9. The re-starting jack 10 can also be used as a direction correcting jack.

A front partition wall 4 formed in an annular shape is provided on the front portion of the inner circumference of the front outer shell 3. The inner wall of the front partition wall 4 is provided with an inner cylinder 5 having a cylindrical shape whose inner diameter is substantially the same as the outer diameter of the existing pipeline 100 (primary lining 101). A seal device (not shown) is provided on the inner peripheral surface of 5.

The front of the front partition wall 4 (left side in FIG. 3)
The cutter 13 is placed in the circumferential direction (arrow B in FIG. 2) with respect to the front outer shell 3 via a turning motor 14 (hydraulic motor or the like).
It is provided so as to be rotatable and driven in the + and B-directions. The cutter 13 is formed in an annular shape having an outer diameter substantially the same as the outer diameter of the outer shells 3 and 6 and an inner diameter substantially the same as the outer diameter of the existing pipeline 100 (primary lining 101). And cutter 13
A large number of bits 13a are provided on the front surface (left surface in FIG. 3) of the.

Further, a mud pipe 16 is provided on the upper part of the front partition wall 4.
, The discharge port is connected to the front of the front partition wall 4 (on the left side in FIG. 3), and a sludge pipe 17 is provided at the lower part of the front partition wall 4 to connect the suction port to the front partition wall. 4 is connected to the front side (the left side in the figure) of the four. The mud pipe 16 and the mud pipe 17 pass through a passage hole 40a of a base 40 in a pipe, which will be described later, and are provided in front of the existing pipe 100 (on the left in FIG. 1). ) And is connected to a muddy water treatment plant (not shown) on the ground.

Inside the rear outer shell 6, as shown in FIG. 3, a gripping device support portion 8 is provided. A dismantling work space 3b is formed inside the outer shells 3 and 6 in front of the gripping device support 8 (on the left in the drawing), and behind the gripping device support 8 (on the right in the drawing). ) Inside the rear shell 6, a backfilling work space 6b (a moving space for a rear partition 7 described later) is formed. Further, a passage hole 8a is formed in the center of the gripping device support portion 8 in the front-rear direction (left-right direction in the drawing) so as to communicate the disassembly work space 3b and the backfill work space 6b.

A plurality of propulsion jacks 11 (hydraulic jacks and the like) are provided behind the gripping device support portion 8 (on the right side in FIG. 3).
The rear outer shell 6 is fixed along the inner peripheral surface of the rear outer shell 6, and a ram 11a is provided on each propulsion jack 11 so as to project and retreat in the front-rear direction (arrows C + and C- directions). ing.

A rear partition wall 7 is provided inside the rear outer shell 6 behind the propulsion jack 11 (on the right side in FIG. 3). The rear partition wall 7 is formed in a disk shape having an outer diameter that is substantially the same as the inner diameter of the rear outer shell 6 so as to block the backfilling work space 6b in the front-rear direction. It is provided so as to be movable in the front-rear direction (arrows D + and D- directions).
Then, a backfill material conveying pipe 18 is connected to the rear partition 7 in a form in which a discharge port is in communication with the rear of the rear partition 7 (right side in the drawing). The backfill material conveying pipe 18 passes through the passage hole 8a of the gripping device support portion 8 and the passage hole 40a of the pipe passage base 40, which will be described later, in front of the pipe passage base 40 (see FIG. 1 to the left) and is connected to a backfill material plant (not shown) existing in the existing pipeline 100 or on the ground.

As shown in FIG. 3, a grip device 26 is provided on the inner peripheral surface of the front partition wall 3 of the disassembly work space 3b. In the grip device 26, a plurality of pressing members 28 formed in an arc shape are radially (arrow G) with respect to the front outer shell 3 via a pressing jack 27 (hydraulic jack or the like).
It is provided so as to be capable of projecting and retracting in the (+, G-directions).
Further, on the inner peripheral surface of the front partition wall 3 of the disassembly work space 3b,
An electric hoist 29 is provided.

A segment gripping device 30 is provided inside the outer shells 3 and 6 of the disassembling work space 3b. In the segment gripping device 30, the swivel member 32 is supported via the gripping device support portion 8 of the rear outer shell 6, and the outer shell 3, via the swivel motor 31 (hydraulic motor or the like). 6 is provided so as to be rotatable in the circumferential direction. Swivel member 32
On the upper side, the elastic member 32 'is provided with the jack 33 for vertical movement.
It is provided so as to be movable and driven in the radial direction (arrows J + and J− directions) with respect to the outer shells 3 and 6 via a (hydraulic jack or the like). An outer cylinder 34 is fixed to the elastic member 32 ', and a catch hawk 37 is attached to the outer cylinder 34 via a front-rear moving jack (not shown) in the front-rear direction (arrows K +, K- directions). ) Is provided so that it can be driven freely.
The catch hawk 37 is provided with gripping members 39, 39 that can be opened and closed in the radial direction via a gripping jack (not shown).

Further, the replace shield machine 1 has an in-pipe base 40, and the in-pipe base 40 has an outer diameter sufficiently smaller than the inner diameter of the existing pipe 100 (secondary lining 102). It is formed in a cylindrical shape with a diameter. A passage hole 40a is formed in the center of the in-pipe base 40 so as to communicate with the dismantling work space 3b in the outer shells 3 and 6 and the space in the existing pipe 100 so as to penetrate therethrough. ..

A plurality of grip devices 41, 46, 46 are provided on the outer peripheral portion of the in-pipe base 40. A moving member 43 is attached to the bar type grip device 41 via a moving jack 42 (hydraulic jack or the like), and a pipe base 40.
It is provided so as to be movable relative to the front-rear direction (arrows M + and M- directions). A plurality of rod-shaped pressing members 45 are provided on the moving member 43 in the radial direction (arrows P +, P) with respect to the in-pipe base 40 via the pressing jacks 44.
It is provided so as to be capable of projecting and retracting in the negative direction. In the pillar-type grip device 46, a plurality of pressing members 48 formed in an arc shape are longitudinally or laterally (arrow Q +, with respect to the in-pipe base 40) via a columnar member 47 that can be expanded and contracted. Q
It is provided so as to be capable of projecting and retracting in the negative direction. In addition, the pressing member 48 is
It is fixed to the in-pipe base 40.

In addition, the outer peripheral portion of the in-pipe base 40 has two
A variety of core removal devices 50, 50 'are provided. That is, the turning movement member 5 is provided on the outer peripheral surface of the in-pipe base 40.
2 is provided so as to be swingable in the circumferential direction (arrows R + and R− in FIG. 4) with respect to the in-pipe base 40 via a swing motor 51, a guide rail, and the like. Swivel moving member 5
On the top of 2, the core removing devices 50, 50 ′ are attached to the fine movement members 54,
54 'and fine adjustment jacks 53, 53', respectively, are provided so as to be further movable in the circumferential direction with respect to the turning movement member 52. In the core removing device 50, two core cutters 59 are provided at a predetermined interval in the front-rear direction (perpendicular to the paper surface of FIG. 4) with respect to the in-pipe base 40, which is the same as the interval between bolt portions BP of the segment 101a described later. ) Is open and arranged in a form. Also, the core removing device 5
At 0 ', four core cutters 59 are installed in the conduit base 40.
A predetermined angular interval in the circumferential direction with respect to
(The same as the angular interval of the bolt portion BP 'of 01a) is opened and arranged.

Each core cutter 5 of the core removing device 50, 50 '
9 is a radial direction or a substantially radial direction (arrow Y) with respect to the conduit base 40 along the rod-shaped support members 56 and 56 '.
It is provided so as to be capable of projecting and retracting in the +, Y-directions and being rotatable about an axis parallel to the moving direction (arrows Y +, Y-directions). Further, each core cutter 59 is formed in a cylindrical shape, and the tip of each core cutter 59 is
Many bits are formed. The support member 56 of each core cutter 59 of the core removing device 50 changes the direction of the core cutter 59 (moving direction (arrow Y +, Y- direction)) via the angle changing jack 55, the pin 54a, and the like. ,
The fine movement member 54 is swingably driven.
Further, the support member 56 ′ of each core cutter 59 of the core removing device 50 ′ is oriented in the direction of the core cutter 59 (moving direction (arrow Y
(+, Y-directions)) are fixed to the fine movement member 54 'in the form of fixing in the radial direction to the in-pipe base 40.

Further, segment breaking devices 70, 70 'are provided on the outer peripheral portion of the in-pipe base 40 with core removing devices 50, 5'.
Turning mechanism similar to 0 '(guide rail, turning motor,
It is provided to be rotatable (movable) in the circumferential direction with respect to the in-pipe base 40 via a swivel movement member, a fine adjustment jack, a fine movement member and the like (not shown). The segment breaking device 70 has two sets of wedges 73 and wedge receivers 74.
The pipe bases 40 are arranged in the front-rear direction with respect to the in-pipe base 40 with a predetermined space (same as the space between bolt portions BP of the segment 101a described later). Further, in the segment breaking device 70 ', four sets of wedges 73 and wedge receivers 74 are arranged at predetermined angular intervals in the circumferential direction with respect to the in-pipe base 40 (the angular intervals of bolt portions BP' of the segment 101a, which will be described later). (Identical) are provided in an arrayed form.

The wedge receivers 74 of the segment breaking devices 70, 70 'are provided so as to be movable in the radial direction or the substantially radial direction (vertical direction in FIG. 5) with respect to the in-pipe base 40. The outer surface 74b of the wedge receiver 74 is the core cutter 59.
It is formed in a cylindrical shape having a diameter that is substantially the same as (slightly smaller than). Further, a taper hole 74a is formed in the center of the wedge receiver 74.
And the tapered hole 74a is formed to have a large diameter on the inside (upper side in FIG. 5) and a small diameter on the outer side (lower side in FIG. 5) with respect to the base 40 in the conduit. The wedge receiver 74 has two substantially semi-cylindrical members 74 that are divided at the central portion where the tapered hole 74a is formed.
It is divided into two, A and 74B.

The wedges 73 of the segment breakers 70, 70 'are provided so as to project and retreat in the radial direction or the substantially radial direction (arrows F +, F- directions) with respect to the in-pipe base 40. .. That is, in the conduit base 40,
A pressing jack 71 (hydraulic jack or the like) is pivotally mounted via a pin 40c, and the ram 71a is attached to the pressing jack 71 substantially in the front-back direction (arrows F + ″, F) with respect to the conduit base 40. It is provided so that it can be driven to project and retract in the "-" direction. A cam 72 is rotatably and pivotally attached to the in-pipe base 40 via a pin 40b so as to project and recede with respect to the rear end surface 73b of the wedge 73 (in the directions of arrows F + 'and F-'). Has been done. The cam 72 has a pin 72
The ram 71a of the pressing jack 71 is pivotally attached via a. The wedge 73 is formed in a substantially conical shape,
The outer surface 73a of the wedge 73 has a tapered hole 7 for the wedge receiver 74.
4a, the inner diameter (upper side of FIG. 5) of the conduit base 40 is larger, and the outer diameter (lower side of FIG. 5) is smaller than the inner diameter of the conduit base 40. The driving means (hydraulic jack, etc.) of the wedge 73 may be arranged in parallel to the moving direction of the wedge 73 (substantially radial direction with respect to the in-pipe base 40), but the above-mentioned pressing jack 71 is also used. like,
By arranging in parallel with the in-pipe base 40 substantially in the front-rear direction, it can be suitably installed in a small space.

The moving direction (arrows F +, F- directions) of the wedges 73 and wedge receivers 74 of each set of the segment breaking device 70 is the same as the angle changing mechanism (support member, pin) of the core cutter 59 of the core removing device 50. , An angle changing jack or the like (not shown)). Further, the moving directions (arrows F + and F− directions) of the wedges 73 and wedge receivers 74 of each set of the segment breaking device 70 ′ are fixed in the radial direction with respect to the in-pipe base 40.

Further, as shown in FIG. 1, a roller conveyor 61 is provided in the passage hole 40a of the in-pipe base 40 so as to extend in the front-rear direction (left-right direction in the drawing). A front end portion (left end portion in the figure) of the roller conveyor 61 is supported via a conveyor moving device 62 on a rail 67a laid inside the existing pipeline 100 so as to be movable in the front-rear direction. Further, the rear end portion (right end portion in the figure) of the roller conveyor 61 is a conveyor pedestal 6 provided on the gripping device support portion 8.
It is supported through 3.

Existing pipeline 100, replace shield machine 1
Has a configuration as described above, so that when the replace shield machine 1 is used to dismantle and refill the existing pipeline 100, the existing pipeline 100 is surrounded from the outside by the outer shells 3 and 6, and 5. The replace shield machine 1 is installed in such a manner that the cutter 13 is arranged outside the existing pipeline 100 (primary lining 101) and the in-pipe base 40 is arranged inside the existing pipeline 100.

Then, through the mud pipe 16, the front partition wall 4
The pressurized mud is supplied to the front (left side in FIG. 3) to pressurize the face, while the cutter 13 is rotationally driven in the circumferential direction (arrow B + or B− direction in FIG. 2) via the turning motor 14. .. At the same time, the ram 11a of the jack 11 for propulsion is projected rearward (direction of arrow C + in FIG. 3) to press the rear partition wall 7, and from the backfilling completion portion 107 behind the rear partition wall 7 (right side in FIG. 1). The cutter 13 is pressed forward (to the face of the face) via the outer shells 6 and 3 in a manner to obtain a reaction force.

Then, the existing pipeline 1 is cut by the cutter 13.
The ground material 200 outside the primary lining 101 (segment 101a) of 00 is excavated, and the hole 200b is formed in an annular shape in a shape corresponding to the outer diameters of the outer shells 3 and 6. At the same time, the outer shells 3 and 6 (and the front partition wall 4, the inner cylinder 5 and the like) are advanced while being inserted into the excavated hole 200b. At this time, the inner cylinder 5
The inner cylinder 5 is between the first lining 101 and the primary lining 101 (segment 101a).
Water is stopped by the sealing device provided on the inner peripheral surface of the.

When the outer shells 3, 6 advance by the length L of one piece of the segment 101a of the existing pipeline 100, the rear partition wall 7 causes the rear outer shell 6 to have a rear end portion (right end portion in FIG. 3).
In addition, the segment 101a (and the secondary lining 102 on the inside thereof) of the existing pipeline 100 projects into the dismantling work space 3b inside the front outer shell 3. At this time, the second segment 101a from the rear (right side in FIG. 3) is positioned inside the grip device 26. In this state, the outer shell 3, 6 by the jack 11 for propulsion
And the rotation of the cutter 13 by the turning motor 14 is stopped.

Next, the in-pipe base 40 is moved in the front-rear direction (left-right direction in FIG. 3) to remove the cores 50, 50 '.
The core cutter 59 is the bolt portion B of the segment 101a.
It is positioned at a predetermined position that can be aligned with P and BP '. That is, the pressing member 48 of the pillar type grip device 46 and the pressing member 45 of the bar type grip device 41 are alternately projected outward (arrow Q + direction, arrow P + direction) via the pillar member 47 and the pressing jack 44. Then, the secondary lining 102 is pressed, and the in-pipe base 40 and the moving member 43 are alternately arranged.
Fixed to 0. Then, the in-pipe base 40 and the moving member 43 are appropriately moved alternately in the front-rear direction (arrows M +, M- directions) via the moving jack 42.

The core removing devices 50 and 50 'are connected to the turning motor 51, the turning movement member 52, and the fine adjustment jack 5.
3, 53 ', and the fine movement members 54, 54' are used to appropriately move the pipe base 40 in the circumferential direction (arrows R + and R- in FIG. 4). Then, each core cutter 59 of the core removing device 50 is positioned so as to be aligned with the bolt portion BP in the circumferential direction (ring direction) of the predetermined segment 101a at the rearmost side (the rightmost side in FIG. 7), and the core removing device 50 is placed. The respective core cutters 59 of ′ ′ are positioned so as to be aligned with the bolt portion BP ′ of the segment 101a in the front-rear direction (pipe line direction).

The core cutters 59 are rotationally driven and project toward the secondary lining 102 and the segment 101a in the radial direction or the substantially radial direction (arrow Y + direction in FIG. 4) with respect to the in-pipe base 40. Let Then, by the core cutter 59, the secondary lining 102 and the segment 10 are
1a is perforated, each bolt portion BP, BP 'shown in FIG. 7 is hollowed out, and each joint bolt 101b of the rearmost (rightmost in the figure) predetermined segment 101a is removed. A hole having an inner diameter substantially the same as the diameter of the core cutter 59 is provided between the predetermined segment 101a at the rearmost side and the secondary lining 102 inside thereof and between the adjacent segment 101a and the secondary lining 102 inside thereof. 100a and 100a 'are formed.

The key segment 101a shown in FIG.
Regarding (K), the joint surface 10 in the circumferential direction (ring direction)
Since 1k and 101k are not formed radially (radially), the joint bolt 1 of the key segment 101a (K)
When removing 01b, the direction (movement direction) of the core cutter 59 of the core removing device 50 is changed to the angle changing jack 5
Change appropriately via 5. Also, the key segment 101
Joint bolt 101 of segment 101a other than a (K)
When removing b, the direction (moving direction) of the core cutter 59 of the core removing device 50 is directed in the radial direction with respect to the in-pipe base 40, similarly to the core cutter 59 of the core removing device 50 ′. Therefore, with respect to the large number of joint bolts 101b connecting the segments 101a, the core removing device 50,
Since the core cutter 59 of 50 'can be suitably positioned and the orientation thereof can be changed, a large number of joint bolts 101b can be cut efficiently.

Since the core removing device 50 is provided with the two core cutters 59, the joint bolts 101b of the two bolt portions BP in the circumferential direction of the segment 101a can be removed at the same time, and the core removing device can be removed. 4 for 50 '
Since one core cutter 59 is provided, the joint bolts 101b of the four bolt portions BP 'in the front-rear direction of the segment 101a can be removed at the same time, and the working time can be shortened. Alternatively, one core cutter 59 may be sequentially positioned on each bolt portion BP, BP ′, and one core cutter 59 may sequentially remove a large number of joint bolts 101b.

The pressing member 28 of the grip device 26
Through the pressing jack 27 so as to protrude inward (in the direction of arrow G + in FIG. 3) from the front outer shell 3 and to the rear (right end in the figure).
The second segment 101a from is pressed from the outside so as not to be crushed.

Next, the expansion / contraction member 32 'and the outer cylinder 34 of the segment gripping device 30 are appropriately moved in the radial direction (arrows J +, J- directions in FIG. 3) via the jacks 33 for vertical movement, and The turning member 32 is appropriately rotated in the circumferential direction via the turning motor 31. The catch hawk 37 is attached to the segment 1 from which the joint bolt 101b is removed.
01a and the inner side of the secondary lining 102 are positioned behind (rightward in the figure). Then, with the catch members 39, 39 of the catch hawk 37 open, the catch hawk 37
Is moved forward (arrow K + direction). When the segment 101a and the secondary lining 102 inside the segment 101a are inserted between the gripping members 39, 39 of the catch hawk 37,
The catching members 39, 39 of the catch hawk 37 are slightly closed to leave a slight gap between the catching members 39, 39 and the segment 101a or the secondary lining 102 inside thereof.

Next, in the same manner as in the case of positioning the core removing devices 50 and 50 ', the in-pipe base 40 is moved in the front-rear direction, and the segment breaking devices 70 and 70' are covered by the core cutter 59. Hole 10 drilled in 102
0a, 100a '(bolt portions BP, BP') are aligned at predetermined positions. Then, the segment breaking devices 70, 70 'are appropriately moved in the circumferential direction with respect to the in-pipe base 40. The wedge receivers 74 and the wedges 73 of each set of the segment breaking device 70 are positioned so as to be aligned with the holes 100a formed in the bolt portion BP in the circumferential direction, and the wedge receivers of each set of the segment breaking device 70 'are positioned. 74
The wedge 73 is positioned so as to be aligned with the hole 100a 'formed in the bolt portion BP' in the front-rear direction.

Then, attach each wedge receiver 74 to the lining 101,
A hole 100a formed between the two segments 101a, 101a by projecting in a radial direction or a substantially radial direction (downward in FIG. 5) with respect to the in-pipe base 40 toward 102.
Insert into 100a '. Next, each wedge 73 is covered with the pressing jack 71 and the cam 72, and the linings 101 and 102 are inserted.
To the base 40 in the conduit, projecting in a radial direction or a substantially radial direction (direction of arrow F +) toward each wedge holder 7
The taper hole 74a of No. 4 is fitted and pressed. Then, as shown in FIG.
As shown in FIG. 6, the wedge holes 73 push and spread the tapered holes 74a of the wedge holder 74, so that the members 74A and 74B of the wedge holder 74 are separated from each other in the horizontal direction in FIG. And
The outer surface 74b of the members 74A and 74B of the wedge holder 74 expands the holes 100a and 100a 'in the left-right direction in FIG. 5, and the predetermined rearmost segment 101a and the secondary lining 102 inside thereof are connected. It is pressed in the direction (circumferential direction or radial direction), and is broken from the adjacent segment 101a and the secondary lining 102 (existing pipeline 100) inside thereof.

As with the core cutter 59 of the core removing device 50, when the key segment 101a (K) is broken, the direction (moving direction) of the wedge receiver 74 and the wedge 73 of the segment breaking device 70 is set by the core cutter 59. It is appropriately changed so as to match the hole 100a that has been drilled.
When breaking the segment 101a other than the key segment 101a (K), the segment breaking device 7
Direction of 0 wedge holder 74 and wedge 73 (movement direction)
Are aligned in the radial direction with respect to the in-pipe base 40 so as to be aligned with the holes 100a formed by the core cutter 59.

When breaking the rearmost segments 101a, all the rearmost segments 101a are to be broken.
With regard to a, after the joint bolt 101b removing work by the core extracting device 50, 50 'is collectively performed, the breaking work by the segment breaking device 70, 70' may be collectively performed. For each time, the removal work of the joint bolt 101b by the core extracting device 50, 50 'and the breaking work by the segment breaking device 70, 70' may be sequentially performed.

As soon as the segment 101a and the secondary lining 102 are broken, the catching members 39, 39 of the catch hawk 37 of the segment catching device 30 shown in FIG. 3 are closed to break the broken segment 101a and the secondary lining 102. Next lining 102
Grab. That is, since the segment 101a and the secondary lining 102 on the inside of the segment 101a are ruptured while being pressed, the adjacent segments 101a are integrally formed as a large lump while maintaining the arc shape of each piece. And the secondary lining 102 (existing pipeline 100) inside thereof can be broken. Therefore, the broken segment 101a and the secondary lining 102 on the inside thereof can be suitably held as a large lump via the catch hawk 37, and small pieces of concrete (gara) may fly down and fall. Because there is no, you can work safely. Further, since the broken segment 101a and the secondary lining 102 can be carried out and removed as a large lump, as described later, the work efficiency is improved as compared with the case where a plurality of small pieces of concrete are carried out and removed. You can do it.

Next, the catch hawk 37 is moved rearward (in the direction of arrow K- in FIG. 3) while holding the broken segment 101a and the secondary lining 102, and the turning member 3 is held.
2 is appropriately rotated in the circumferential direction, and the elastic member 32 'and the outer cylinder 34 are appropriately moved in the radial direction (arrows J +, J- directions). Then, the broken segment 101a and the secondary lining 102 are placed on the bottoms of the outer shells 3 and 6.

In this way, when the breaking and removing of one segment 101a and the secondary lining 102 inside thereof is completed, the segment breaking devices 70, 70 'and the segment gripping device 3 are removed.
Rotate the 0 catch hawk 37 appropriately in the circumferential direction,
The rearmost segments 101a and the secondary lining 102 on the inner side thereof are fractured and removed sequentially in the circumferential direction.

Next, the broken segment 101a and the secondary lining 102 are transferred onto the roller conveyor 61 via the electric hoist 29 and passed through the passage hole 40a via the roller conveyor 61. The paper is conveyed to the front of the in-pipe base 40 (left in FIG. 1). And electric hoist 6
5 is transferred to the dolly 67 via the dolly 67,
It is transported to the pit existing in front of the existing pipeline 100 and is transported to the ground. That is, the segment 101a and the secondary lining 1
02 is removed as a large lump, and the generation of small pieces of concrete is small, so segment 101a and secondary lining 1
02 can be easily carried out via the carriage 67 or the like.

As described above, the jack 11 for propelling the rear partition 7 is pressed while the segment 101a of the existing pipeline 100 and the secondary lining 102 are being dismantled and removed.
Ram 11a is moved backward (in the direction of arrow C in FIG. 3) and separated from the rear partition wall 7. Then, behind the rear partition wall 7 (on the right side in FIG. 3), muddy water is filled from a mud pipe (not shown), and the pressure of the muddy water filled causes the rear partition wall 7 to move forward with respect to the rear outer shell 6. Move to (arrow D + direction). When the rear partition 7 advances by the length L of one piece of the segment 101a of the existing pipeline 100,
The filling of muddy water and the advance of the rear partition 7 are stopped. At this time, the rear partition wall 7 is in a state of being close to the retracted ram 11a of the propulsion jack 11.

Then, the backfill material 106 is replaced with the backfill material transport pipe 1.
It is press-fitted behind the rear partition wall 7 via 8. At the same time, the muddy water filled in the rear of the rear partition wall 7 is discharged through the mud discharge pipe (not shown) to replace the muddy water with the backfill material 106, and the backfill material 106 of the rear partition wall 7 is replaced. Fill backwards.
The backfill material 106 is manufactured by a basic material made of water, sand and clay, a binding material made of water and cement, and a quick-setting material. That is, the core material and the binding material are separately generated, and are conveyed from the pit existing in front of the existing pipeline 100 to the vicinity of the replace shield machine 1 by pumping, pumping, and the like. Then, in the vicinity of the replace shield machine 1, the basic material and the binder are kneaded, and the quick-setting material is added thereto, and the manufactured backfill material 106 is supplied to the backfill material transport pipe 18.

The dismantling work (removing the segment 101a and the secondary lining 102 from the existing pipeline 100) is performed in the dismantling work space 3b in the front part of the replace shield machine 1 and the backfilling work (the rear partition 7 The filling of the backfill material 106 to the rear of the rear partition wall 7 by the movement is performed in the backfill work space 6b in the rear part of the replace shield machine 1, and therefore the dismantling work and the backfill work are performed separately and in parallel. It can be performed by improving the workability. The dismantling work and the backfilling work are performed in the work spaces 3b and 6 inside the outer shells 3 and 6, respectively.
In step b, since the pressure is applied so as to face the pressure of the backfill material 106 at the natural rock 200 and the backfill completion portion 107, the work can be safely performed.

Thus, all the last segments 10
1a and the secondary lining 102 on the inside thereof are fractured and removed, and the backfill material 106 is filled behind the rear partition wall 7 by the length L of one piece of the segment 101a. , The front outer shell 3 and the cutter 13 are retracted with respect to the rear outer shell 6 and the ground 200 (the rear outer shell 6
Is fixed by friction between the outer ground material 200 and the backfilling material 106 at the inner backfilling completion portion 107). Then,
The cutter 1 that has been in a state of being embedded in the natural ground 200 (face) by the pressure of the backfilling material 106 at the backfilling completion portion 107.
Since the bit 13a of 3 separates from the natural ground 200, the cutter 13 can be rotationally driven again as described later.

Then, again, as described above, the cutter 1
3 is rotationally driven in the circumferential direction (arrow B + or B− direction in FIG. 2), the ram 11a of the jack 11 for propulsion is projected rearward (direction C + in FIG. 3) to press the rear partition wall 7,
The replace shield machine 1 is advanced by the length L of one piece of the segment 101a. That is, by excavating the rock mass 200 outside the existing pipeline 100 with the cutter 13, the replace shield machine 1 can be moved forward, and the dismantling work and the backfilling work of the existing pipeline 100 are continuously performed. You can

[0052]

As described above, according to the present invention, when disassembling the existing pipeline 100 constructed by the plurality of segments 101a connected to each other through the joint member such as the joint bolt 101b, the core cutter is disassembled. The segment 101a is hollowed out by a perforation means such as 59 to form holes 100a, 100 in the segment 101a.
removing or cutting said joint member to form a ',
Since the segment 101a is configured to be broken by pushing the holes 100a and 100a 'formed by the perforating means by pressing means such as the wedge 73 and the wedge receiver 74, the segment 101a is connected in the connecting direction. By pushing it, the adjacent segment 101a can be broken, and the existing pipeline 100 can be suitably disassembled. If the secondary lining 102 is formed inside the segment 101a, the segment 101
a and the secondary lining 102 collectively through the hole 1
00a, 100a 'are formed and the holes 100a, 100a
By pressing the segment 101a and the secondary lining 102 together by pressing means in such a manner that a'is expanded, the segment 101a and the secondary lining 102 are integrally broken as a large lump. It is possible to reduce the occurrence of concrete debris. Therefore, compared with the case where the secondary lining 102 is finely crushed, the broken secondary lining 102 (along with the segment 101a) can be easily held and taken out and removed, and the existing pipeline 100 can be safely and safely removed. Can be dismantled efficiently.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which an existing pipeline is dismantled and backfilled by a replace shield machine.

FIG. 2 is a cutter II of the replace shield machine shown in FIG.
It is an arrow view.

3 is an enlarged view of the replace shield machine shown in FIG. 1. FIG.

FIG. 4 is an enlarged view of the core removing device of the replace shield machine shown in FIG.

FIG. 5 is a view showing a segment breaking device of a replace shield machine.

6 is a perspective view showing an operating mechanism of the segment breaking device shown in FIG. 5. FIG.

FIG. 7 is a development view showing a joint portion of a segment of an existing pipeline.

[Explanation of symbols]

 59 ...... Punching means (core cutter) 73 ...... Pressing means (wedge) 74 ...... Pressing means (wedge receiving) 100 ...... Existing pipeline 100a, 100a '...... hole 101a ...... segment 101b ...... Joint member (joint bolt) )

Claims (1)

[Claims] 1. When disassembling an existing pipeline constructed by a plurality of segments connected to each other via a joint member, the segment is hollowed out by a piercing means to form a hole in the segment, A method for disassembling an existing pipeline, wherein the joint member is removed or cut, and the segment formed by breaking the segment formed by the punching unit by the pressing unit.