JPH05163899A - Existing pipeline dismantling device - Google Patents

Abstract

PURPOSE:To favorably dismantle an existing pipeline. CONSTITUTION:An existing pipeline 100 is surrounded by sheaths 3, 6. The natural ground 200 outside of the existing pipeline 100 is excavated by a cutter 13, and the sheaths 3, 6 are advanced. A joint bolt of a segment 101a is removed by a core removing device 34. A working truck 50 in the existing pipeline 100 is moved. Inside and outside of the existing pipeline 100, a plurality of ring-form coupled blocks 41, 61 of grip devices 40, 60 are approached or separated from one another in the circumferential direction and protruded in the radial direction. The second backmost segment 101a and secondary covering 102 are pressed and restrained by these grip devices 40, 60, while the segments 101a and secondary coverings 102 situated the backmost are pressed and ruptured by a covering rupture device 70. Thereby the segments 101a and secondary coverings 102 can solely be ruptured.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an existing pipeline (tunnel).
The present invention relates to a device for dismantling an existing pipeline, which can be suitably dismantled when backfilling the same.

[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 an apparatus for disassembling an existing pipeline that can dismantle the existing pipeline.

[0005]

The present invention provides a joint member (1
In an apparatus for disassembling an existing pipeline (100) constructed by a plurality of segments (101a) connected to each other via 01b), a tubular shell (3, 6) larger than the existing pipeline (100) is used. In front of the outer shell (3, 6), the excavation means (13) is provided in the form of excavating the ground (200) in an annular shape corresponding to the shape of the outer shell (3, 6). , The joint breaking means (34) to the segment (101
The joint member (101b) of a) is provided so as to be removed or cut, and the lining breaking means (71) is used as the joint breaking means (3).
4) The joint member (101b) is provided in such a shape that the segment (101a) from which the joint member (101b) has been removed or cut is pressed and ruptured, and a plurality of lining outer holding means are provided on the inner peripheral portion of the outer shell (3, 6). (41) are connected to each other in the circumferential direction so as to surround the segment (101a) from the outside in an endless annular shape in the circumferential direction and project and recede in the radial direction with respect to the segment (101a). The positioning means (50) is provided so as to be able to be driven away from each other, and the positioning means (50) is movably provided inside the existing pipeline (100).
A plurality of inner lining holding means (61) are connected to the upper end in the circumferential direction in an endless annular shape so as to surround the segment (101a) from the inside, and the segment (101a)
With respect to the radial direction, they are provided so as to be able to be driven toward and away from each other in the circumferential direction so as to be projected and retracted in the radial direction.

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
When breaking 1a), the adjacent segments (10
1a) acts so as to be held by the lining outside holding means (41) and the lining inside holding means (61).

[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 of excavating the replace shield machine and removing a joint bolt of a segment in the backfilling of the existing pipeline by the replace shield machine, and FIG. In dismantling and backfilling, a cross-sectional view showing a state in which the segment and the secondary lining on the inside thereof are broken and removed, and backfilling of the rear part of the rear partition wall is performed, and FIG. 3 is a swivel movement device and a catch hawk shown in FIG. 1. , And an enlarged view of the core removing device, FIG. 4 is an IV view of the outer grip device shown in FIG. 1, and FIG. 5 is an enlarged view of the work carriage, the inner grip device, and the lining breaking device shown in FIG. FIG. 6 is a view of the work carriage shown in FIG.
8 is a view of the inner grip device shown in FIG.
Is a view of the lining breaking device shown in FIG.
FIG. 10 is a developed view showing the joint portion of the segment of the existing pipeline, FIG.
FIG. 9 is a diagram showing a modified example of the work carriage shown in FIG. 5.

An existing pipeline 100 (tunnel) to be disassembled and backfilled is, as shown in FIG. 1, FIG. 2 or FIG. 6, a cylindrical primary lining 101 and a secondary lining formed inside thereof. 10
2 (concrete), the structure is extended in the left-right direction of FIG. 1 or 2. The primary lining 101 is shown in FIG.
As shown in FIG. 6, a plurality of (six in FIG. 6) arc-shaped segments 101a are arranged in the front-rear direction (pipe direction perpendicular to the paper surface of FIG. 6) and in the circumferential direction (perpendicular to the pipe direction). It is constructed in the form of a cylindrical assembly in the ring direction). That is, as shown in FIG. 10, one segment 101a is provided with two bolt portions BP at both ends in the circumferential direction (vertical direction in the figure), respectively. 4 bolts BP on each end
Is provided. Then, the segment 101a, in each bolt portion BP, through the joint bolt 101b,
It is connected to the adjacent segment 101a. In addition, in FIG. 10, the bolt portions BP at the right end and the upper end in the figure are hollowed out together with the joint bolt 101b, and the right side (rear) in the figure is shown.
Shows that the segment 101a that was present in 1 is already removed. The existing pipeline 100 for the disassembly backfilling may be constructed only by the primary lining 101 (segment 101a) (that is, the secondary lining 102 may not necessarily be formed). In addition, each segment 101
The number of bolt parts BP and BP 'of a is not always two,
It does not have to be four places.

As shown in FIG. 1, 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
Are connected so as to be relatively movable in the directions of the arrows C + and C- (front-back direction). That is, the rear end of the front outer shell 3 (right end in the figure) and the front end of the rear outer shell 6 (left end in the figure)
Are in close contact with each other via a sealing device 8 in a slidable manner. At the front end of the inner periphery of the rear outer shell 6, a plurality (the same number as the following jacks 11 for propulsion) of restarting jacks (hydraulic jacks, etc.) 10 are arranged along the inner peripheral surface of the rear outer shell 6. In a fixed shape, it is pivotally attached via a pin 6a. A ram 10a is provided on each of the re-advancing jacks 10 so as to be capable of projecting and retracting. The ram 10a is pivotally attached to a rear end portion of an inner periphery of the front outer shell 3 via a pin 3a.
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. An inner cylinder 5 formed in a cylindrical shape having an inner diameter slightly larger than the outer diameter of the existing pipeline 100 (primary lining 101) is provided on the inner peripheral portion of the front partition wall 4. A sealing device (not shown) is attached to the peripheral surface.

The front of the front partition wall 4 (left side in FIG. 1)
The cutter 13 has a turning motor (hydraulic motor, etc.) 1
It is provided so as to be rotatable and driven in the circumferential direction with respect to the front outer shell 3 (front partition wall 4). 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). A large number of bits are provided on the front surface (left surface in the figure) of the cutter 13.

On the upper part of the front partition wall 4, a mud pipe 4a is provided.
, The discharge port is connected to the front of the front partition wall 4 (on the left side in FIG. 1), and at the lower part of the front partition wall 4, a sludge discharge pipe 4b is provided and the suction port is connected to the front partition wall. 4 is connected to the front side (the left side in the figure) of the four. The mud sending pipe 4a and the mud discharging pipe 4b pass through a cavity 55a of a device supporting portion 55 of a work carriage 50, which will be described later, and are located in front of the existing pipeline 100 (left side in the figure). It is extended to (not shown) and connected to a muddy water treatment plant (not shown) on the ground.

On the inner peripheral portion of the rear outer shell 6, a turning movement device supporting portion 16 is fixedly provided. Then, as shown in FIG. 2, in front of the turning movement device supporting portion 16 (to the left in the drawing).
A demolition work space 3b is formed inside the outer shells 3 and 6, and a backfill work space 6b is formed inside the rear outer shell 6 behind the turning movement device support portion 16 (to the right in the drawing). (A moving space of the rear partition 7 which will be described later) is formed.

A plurality of propulsion jacks 11 are fixed to the rear of the turning movement device supporting portion 16 (on the right side in FIG. 2) so as to be arranged along the inner peripheral surface of the rear outer shell 6, Each propulsion jack 11 is provided with a ram 11a so as to project and retract in the directions of arrows A + and A- (front-back direction).

In the backfill work space 6b, a rear partition wall 7 is provided in a form arranged behind the propulsion jack 11 (right side in FIG. 2). 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 directions of arrows B- and B + (forward and backward directions). Then, a backfill material conveying pipe (not shown) is connected to the rear partition 7 in a manner such that the discharge port communicates with the rear of the rear partition 7 (right in the figure). The backfill material transport pipe passes through a hollow portion 21c of a swivel member 21 of a swivel movement device 20 described later and passes through a hollow portion 55a of a device support portion 55 of a work truck 50 described later in such a manner that the work truck is operated. It is extended to the front of 50 (left in the figure) and connected to the backfill material plant (not shown) existing in the existing pipeline 100 or on the ground.

In the dismantling work space 3b, the outer grip device 40 is arranged behind the inner cylinder 5 (right side in FIG. 2), and the primary lining 101 (segment 10) of the existing pipeline 100 is formed.
1a) is provided in an annular shape so as to surround the entire circumference from the outside. As shown in FIG. 4, the outer grip device 40 includes a plurality of (eight in FIG. 4) blocks 41.
Are provided so as to be arranged at equal angular intervals in the circumferential direction with respect to the inner cylinder 5. Then, each block 41 includes the inner cylinder 5
With respect to the radial direction with respect to each other, they can be driven toward and away from each other in the directions of arrows N- and N + (circumferential direction with respect to the inner cylinder 5) through the pressing jack 43 so as to be annular and endless. It is connected. That is, the pressing jack 43 is pivotally attached to one end of each block 41 in the circumferential direction via the pin 41a. The pressing jack 43 has a ram 43a.
Ram 43a
Is pivotally attached to one end in the circumferential direction of another adjacent block 41 via a pin 41b. And each block 4
A contact surface 42 is provided on the inner peripheral portion of No. 1 in an arc shape corresponding to the outer diameter of the existing pipeline 100 (primary lining 101).

Further, in the dismantling work space 3b, the rupture lining holding portion 17 is arranged so as to be adjacent to the rear of the outer grip device 40 (right side in FIG. 2), and the primary covering of the existing pipeline 100 is provided. The work 101 (segment 101a) is annularly provided so as to surround the entire circumference from the outside, and is fixed to the inner peripheral portion of the front outer shell 3. As shown in FIG. 1, the broken lining holding portion 17 has a gap G (about 5 cm) between the inner peripheral surface 17a of the broken lining holding portion 17 and the outer peripheral surface of the existing pipeline 100 (primary lining 101). ), The inner diameter of the existing pipeline 100
It is slightly larger than the outer diameter of the (primary lining 101) and has a length in the front-back direction (left-right direction in the drawing) of 1 of the segment 101a
It is formed in an annular shape that is substantially the same as the length L of the piece (note that the gap G is a block 71 of a lining breaking device 70 described later).
Corresponds to the radial stroke of). Then, as shown in FIG. 9, a plurality of gripping grooves 17b are provided on the inner peripheral surface 17a of the fractured lining holding portion 17, and the catch hawk 3 will be described later.
It is recessed in a shape corresponding to the thickness of the gripping member 31 of zero.

Further, in the dismantling work space 3b, as shown in FIG. 1, a turning movement device 20 is provided in a form arranged behind the breaking lining holding portion 17 (rightward in the drawing). ..
The turning device 2 includes a turning member 2 formed in a disc shape.
1 is supported by the turning movement device supporting portion 16 of the rear outer shell 6, and the arrow D +, 1 through the turning motor 22.
It is provided so as to be rotationally driven in the D-direction (the circumferential direction with respect to the rear shell 6). In the center of the swivel member 21, the cavity 2
1 c is formed so as to communicate the dismantling work space 3 b and the backfill work space 6 b in the front-rear direction (left-right direction in the drawing). As shown in FIG. 3, in front of the swivel member 21 (on the left side in the drawing), a boom 23 extends from the swivel member 21, and through the moving jacks 24, the arrow E +, E− directions (outer shell). It is provided so as to be rotatable and driven in the front-back direction and the radial direction with respect to 3 and 6. That is, the boom 23 is pivotally attached to the revolving member 21 via the pin 21a, and the moving jack 24 is pivotally attached to the rotating member 21 via the pin 21b. A ram 24a is provided on the moving jack 24 so as to be capable of projecting and retracting, and the ram 24a is pivotally attached to the boom 23 via a pin 23b. In front of the boom 23 (on the left in the figure), the arm 25 extends from the boom 23 and, via the moving jack 26, is in the directions of arrows F + and F− (front and rear and radius relative to the outer shells 3 and 6). Direction) is provided so as to be freely rotatable. That is, the boom 23 has the arm 2
5 is pivotally attached via a pin 23a, and a moving jack 26 is pivotally attached via a pin 23c. A ram 26a is provided on the moving jack 26 so as to be capable of projecting and retracting, and the ram 26a is pivotally attached to the arm 25 via a pin 25b. Then, the front end member 27 is provided in front of the arm 25 (on the left side in the drawing) and the moving jack 2
It is rotatably driven via arrows 8 in the directions of arrows H + and H- (front-back and radial directions with respect to the outer shells 3 and 6). That is, the tip member 27 is pivotally attached to the arm 25 via the pin 25 a, and the moving jack 28 is attached to the pin 25.
It is pivotally connected via c. On the moving jack 28,
A ram 28a is provided so as to be capable of projecting and retracting, and the ram 28a is pivotally attached to the tip member 27 via a pin 27a.

A catch hawk 30 is provided at the front part (left part in FIG. 3) of the tip member 27 of the turning movement device 20, and the catch hawk 30 has gripping members 31, 31.
Through the gripping jack (not shown), the arrow M +,
The opening / closing drive is provided in the M-direction (radial direction with respect to the outer shells 3 and 6).

A core removing device 34 is provided on the outer peripheral portion (upper part in FIG. 3) of the tip member 27 of the turning and moving device 20, and the core removing device 34 has a core cutter 37 and arrows J +, J. It is provided so as to be capable of projecting and retracting in the − direction (usually in the radial direction with respect to the outer shells 3 and 6) and being capable of being opened and closed in the directions of the arrows K + and K−. That is, the tip member 27
A rod-shaped support member 35 is provided on the outer peripheral surface (upper surface in the figure) of the device in a form extending in the directions of arrows J + and J−. On the support member 35, a traveling member 36 is provided via a rack (not shown) fixedly provided on the support member 35 and a pinion gear (not shown) rotatably driven on the traveling member 36. It is mounted so as to be movable along the support member 35. Then, the core cutter 37 is provided on the traveling member 36.
Is rotatably driven. Core cutter 37
Is formed in a cylindrical shape having a diameter larger than the size of the joint bolt 101b of the segment 101a, and a large number of bits are fixed to the tip (upper end in the figure) of the core cutter 37. The support member 35 of the core removing device 34 is oriented in the direction of the core cutter 37 (moving direction (arrow J +, J- direction)).
Is provided so as to be rotatable with respect to the tip member 27 via an angle changing jack (not shown). That is, in the key segment (the central uppermost segment 101a in FIG. 6), the circumferential joint surface is not formed in the radial direction of the existing pipeline 100 (radially), but the orientation of the core cutter 37 is set to the direction of the joint surface. By appropriately changing the inclination angle of the supporting member 35 so as to match with the above, it is possible to deal with the key segment (the joint bolt can be removed).

Further, the replace shield machine 1 has a work carriage 50 as shown in FIG.
The frame 51 is provided in the shape of a frame extending in the front-rear direction (left-right direction in the drawing). As shown in FIG. 5 or 6, a plurality of rollers 53 are rotatably attached to the lower portion (bottom portion) of the frame 51 via legs 52.
The leg 52 of each roller 53 is formed in a predetermined length corresponding to the inner diameter of the existing pipeline 100 (secondary lining 102) by arranging a device support portion 55 described later in the center of the existing pipeline 100. And are arranged radially. Work trolley 50
A device support 55 is provided at the rear part (right part of FIG. 5) of the existing pipe 100 (secondary lining 1).
02) is formed in a cylindrical shape having an outer diameter sufficiently smaller than the inner diameter. The hollow portion 55a is formed in the center of the device supporting portion 55 by breaking and removing the segment 1 as described later.
01a and the secondary lining 102 and the like are secured in a sufficient size to allow the dismantling work space 3b in the outer shells 3 and 6 and the space in the existing pipeline 100 to communicate with each other. It is perforated on the left and right in FIG. Further, on the frame 51, as shown in FIG. 5, a rail 51a guides a carriage (not shown) that conveys the broken and removed segment 101a, the secondary lining 102, and the like, and the device supporting portion 55. Is laid so as to penetrate through the hollow portion 55a.

An inner grip device 60 is provided on the outer peripheral portion of the device supporting portion 55 of the work carriage 50 in an annular shape so as to surround the secondary lining 102 of the existing pipeline 100 from the inside to the entire circumference. ing. As shown in FIG. 7, the inner grip device 60 includes a plurality of (eight in FIG. 7) blocks 61.
Are provided so as to be arranged at equal angular intervals in the circumferential direction with respect to the device supporting portion 55. Then, each block 61
Are configured to project and retreat in the radial direction with respect to the device supporting portion 55, and can be driven toward and away from each other in the directions of arrows P + and P- (circumferential direction with respect to the device supporting portion 55) via the pressing jack 63. , Are connected in an annular shape and endlessly. That is,
In the outer peripheral portion of the device support portion 55 of the work carriage 50, a plurality of (8
Individual slide holes 55b are formed in a manner of being arranged at equal angular intervals in the circumferential direction and extending in the radial direction. A sliding pin 61c is provided so as to project from the inner peripheral portion of each block 61, and the sliding pin 61c is slidably inserted into a sliding hole 55b of the device supporting portion 55. Furthermore, a pressing jack 63 is provided at one end of each block 61 in the circumferential direction.
It is pivotally attached via a pin 61a. Pressing jack 6
3, a ram 63a is provided so as to be capable of protruding and retracting, and the ram 63a is pivotally attached to one end in the circumferential direction of another adjacent block 61 via a pin 61b. A contact surface 62 is provided on the outer peripheral portion of each block 61 in a shape of an arc corresponding to the inner diameter of the existing pipeline 100 (secondary lining 102).

On the outer peripheral portion of the device supporting portion 55 of the work carriage 50, a lining breaking device 70 is arranged behind the inner grip device 60 (right side in FIG. 5) by the length L of one piece of the segment 101a. In this manner, the secondary lining 102 of the existing pipeline 100 is annularly provided so as to surround the entire circumference from the inside. As shown in FIG. 8, a plurality of (8 in FIG. 8) blocks 71 are provided in the lining breaking device 70 in a form arranged at equal angular intervals in the circumferential direction with respect to the device supporting portion 55. ing. The blocks 71 project and retract in the radial direction with respect to the device supporting portion 55, and in the directions Q + and Q− (the circumferential direction with respect to the device supporting portion 55) via the pressing jacks 73. It is connected in an annular shape and in an endless shape so that it can be driven toward and away from one another. That is, a plurality of (eight) sliding holes 55c are provided in the outer peripheral portion of the device supporting portion 55 of the work carriage 50 in a manner that they are arranged at equal angular intervals in the circumferential direction and extend in the radial direction. Has been done. Further, a sliding pin 71c is provided on the inner peripheral portion of each block 71, and the sliding pin 71c is provided in the sliding hole 5 of the device supporting portion 55.
5c is slidably inserted. Furthermore, each block 7
At one end in the circumferential direction of 1, the pressing jack 73 has a pin 7
It is pivotally attached via 1a. A ram 73a is provided in the pressing jack 73 so as to be capable of projecting and retracting, and the ram 73a is pivotally attached to one end in the circumferential direction of another adjacent block 71 via a pin 71b. The pressing jack 73 of the lining breaking device 70 has a larger pressing force than the pressing jacks 43 and 63 of the grip devices 40 and 60 described above. The contact surface 72 is provided on the outer peripheral portion of each block 71, and the existing pipeline 100 (secondary lining 10
It is provided in the shape of an arc corresponding to the inner diameter of 2).

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 cutter 13 to the existing pipeline 100 (lining 1
01, 102), the turning movement device 20 is arranged behind the existing pipeline 100, and the work carriage 50 is arranged inside the existing pipeline 100 (lining 101, 102).
Install the replace shield machine 1.

Then, the front partition wall 4 is passed through the mud pipe 4a.
While supplying pressurized muddy water to the front (left side in FIG. 1) to pressurize the face, the cutter 13 is rotationally driven in the circumferential direction with respect to the front partition wall 4 via the turning motor 14. At the same time, the ram 11a of the propulsion jack 11 is projected in the arrow A + direction (rearward) to press the rear partition wall 7, and a reaction force is applied from the backfilling completion portion 107 behind the rear partition wall 7 (rightward in the figure). In the obtained form, the cutter 13 is pressed forward (to the cutting face) via the outer shells 6 and 3.

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 a sealing device (not shown) provided on the inner peripheral surface of the.

When the outer shells 3 and 6 are advanced by the length L of one piece of the segment 101a of the existing pipeline 100, the rear partition wall 7 is moved relative to the rear outer shell 6 by the arrow B.
Moving in the + direction (rearward), the rear end portion of the rear outer shell 6 (see FIG.
It is located at the middle right end). In addition, the existing pipeline 10
The segment 101a on the rear side of 0 (on the right side in the drawing) and the secondary lining 102 inside thereof are in a state of projecting into the dismantling work space 3b inside the front outer shell 3. At this time, the rearmost segment 101a (rightmost in FIG. 1) is located inside the fracture lining holding portion 17, and the second segment 101a from the rear is located inside the outer grip device 40. In this state, the forward movement of the outer shells 3 and 6 by the propulsion jack 11 is stopped, and the rotation of the cutter 13 by the turning motor 14 is stopped. At this time, the ram 10a of the re-progressing jack 10 is projected in the arrow C + direction (forward).

Next, the turning member 21 of the turning movement device 20.
1 is rotationally driven in the arrow D + and D- directions (circumferential direction) shown in FIG. 1 through the turning motor 22, and the boom 23 is moved through the moving jack 24 in the arrow E + and E- directions in FIG. Direction and radial direction) to rotate the arm 25 appropriately,
Via the moving jack 26, the tip member 27 is appropriately rotated in the F + and F-directions (front-back direction and radial direction).
Through the moving jack 28 in an appropriate direction in the directions of arrows H + and H- (front-back direction and radial direction). Then, as shown in FIG. 1, the tip member 2 of the turning movement device 20.
In the form of extending 7 from the turning member 21 arranged at the rear (right side in the figure) of the existing pipeline 100 to the front (left side in the figure),
The core removing device 34 is moved into the existing pipeline 100. Then, the core cutter 37 of the core removing device 34 is sequentially positioned so as to be aligned with each bolt portion BP of each rearmost segment 101a shown in FIG. The work carriage 50 in the existing pipeline 100 is moved and retracted forward (to the left in FIG. 1).

When the core cutter 37 is positioned at the predetermined bolt portion BP, the core cutter 37 is moved in the arrow J + direction (radial direction) while being rotationally driven in the arrow K + (or K-) direction in FIG. Lining 101 of pipe 100
Protrude to the 2 side. Then, by the core cutter 37,
Secondary lining 102 and segment 101 of the existing pipeline 100
a is drilled and each bolt portion BP shown in FIG. 10 is hollowed out, and each segment 101a on the rearmost side of the existing pipeline 100 is formed.
The joint bolts 101b are sequentially removed.

At this time, since the core removing device 34 is moved via the swivel moving device 20 common to the catch hawk 30, the dismantling work space 3b in the outer shells 3, 6 or the existing pipeline 10 is removed.
The area occupied by the core extracting device 34 and the like in the space within 0 can be reduced. Further, the core removing device 34 is supported by the turning movement device supporting portion 16 arranged outside the existing pipeline 100 via the turning member 21 of the turning movement device 20, and the arm 25 of the turning movement device 20 and the boom. By extending 23, it is moved to the space in the existing pipeline 100, so that the area occupied by the core extracting device 34 in the space in the existing pipeline 100 can be further reduced. Therefore, even if the existing pipeline 100 has a small diameter, the core removing device 3
Since it is possible to avoid interference with other devices when 4 moves, positioning of the core cutter 37 with respect to the large number of joint bolts 101b of the segment 101a of the existing pipeline 100 can be suitably performed, and the existing pipeline 100 The dismantling work can be performed efficiently.

When the joint bolts 101b of all the rearmost segments 101a are removed, the swinging member 21, the boom 23, the arm 25, and the tip member 27 of the swinging and moving device 20 are appropriately rotationally moved to drive the core removing device 34. Existing pipeline 1
00 (to the rear of the existing pipeline 100). Therefore, when the segment 101a of the existing pipeline 100 and the secondary lining 102 to be ruptured, which will be described later, in the existing pipeline 100, the work carriage 50, the inner grip device 60, the lining breaking device 70, and the core removing device 34 are provided. Can be prevented from interfering with each other, and the segment 101a and the secondary lining 1
It is possible to suitably perform the breaking work of 02.

Next, the work carriage 50 in the existing pipeline 100 is moved rearward (rightward in FIG. 2). And work trolley 5
The inner grip device 60 on the rear side of the existing pipeline 100 (right side in the figure) in such a manner as to face the outer grip device 40 on the inner peripheral surface of the front outer shell 3 with the inner grip device 60 sandwiched between the linings 102 and 101. It is positioned inside the second segment 101a (and the secondary lining 102 inside thereof). In addition, the work carriage 50
The upper lining breaking device 70 is positioned inside the rearmost (rightmost in the figure) segment 101a of the existing pipeline 100 (and the secondary lining 102 inside thereof).

Then, each block 41 of the outer grip device 40 is connected to each of the arrows N in FIG.
-They approach each other in the -direction (circumferential direction). The pressing jacks 43 are simultaneously driven in an interlocking manner via a common hydraulic unit. Then, each block 41 projects inward (radial direction) from the inner cylinder 5 side in a form in which the gap between the blocks 41 connected in an annular and endless shape is reduced, and the contact surface 42 of each block 41 The second segment 101a from the rear of the existing pipeline 100 is pressed from the outside. At the same time, each block 61 of the inner grip device 60
Are separated from each other in the arrow P + direction (circumferential direction) of FIG. 7 via the pressing jacks 63. The pressing jacks 63 are simultaneously driven in an interlocking manner via a common hydraulic unit. Then, the gap between the blocks 61 connected in an annular and endless shape is expanded, and
From the device support portion 55 side to the outside (radial direction),
By the contact surface 62 of each block 61, the existing pipeline 100
The secondary lining 102 on the inner side of the second segment 101a from the rear is pressed from the inside. That is, the grip device 4
By connecting the blocks 41 and 61 of 0 and 60 in an endless ring shape and driving them toward and away from each other in the circumferential direction, it is possible to project and retract in the radial direction, so that the pressing jacks 43 and 63 can be made into a small space. Can be placed. Therefore, since the diameters of the outer shells 3 and 6 of the replace shield machine 1 can be reduced, the amount of excavation of the rock mass 200 associated with the forward movement of the replace shield machine 1 and the rear of the replace shield machine 1 described later are filled. The amount of backfill material used can be reduced. In addition, even in the existing pipeline 100 having a small diameter, the hollow portion 55 of the device support portion 55 of the work carriage 50 is provided.
Since it is possible to sufficiently secure the width of a, it is possible to suitably carry out the rupture-removed segment 101a and the secondary lining 102, which will be described later, and to appropriately dismantle the existing pipeline 100. Can be done.

Next, each block 71 of the lining breaking device 70
Are separated from each other in the arrow Q + direction (circumferential direction) of FIG. 8 via the pressing jacks 73. The pressing jacks 73 are simultaneously driven in an interlocking manner via a common hydraulic unit. Then, each block 71 is formed in such a manner that the gap between the blocks 71 connected in an annular and endless manner is enlarged.
From the device support portion 55 side to the outside (radial direction),
By the contact surface 72 of each block 71, the existing pipeline 100
The rearmost segments 101a and the inner secondary lining 102 thereof are pressed from the inside. That is, the lining breaking device 7
By connecting the blocks 71 of 0 in an endless annular shape and driving them toward and away from each other in the circumferential direction, they can be projected and retracted in the radial direction, so that the pressing jack 73 can be arranged in a small space. Therefore, even with the existing small-diameter pipeline 100, the space of the cavity 55a of the device supporting portion 55 of the work carriage 50 can be sufficiently ensured, so that the segment 101a and the secondary cover after breakage and removal described later are removed. It is possible to suitably carry out the work 102 and to disassemble the existing pipeline 100.

Each of the rearmost segments 101a and the secondary lining 102 on the inner side of the segment 101a has already been attached to all the joint bolts 101b.
Is removed, the block 7 of the lining breaking device 70 is removed.
When pressed by 1, as shown in FIG. 2 or FIG.
The segment 101a adjacent in the circumferential direction and the front-rear direction and the secondary lining 102 inside the segment 101a are broken. At this time, all the segments 101a on the rearmost side and the secondary lining 102 inside thereof are the same as the segment 101a and the secondary lining 10
Since the blocks 71 of the lining breaking device 70, which are arranged around the entire circumference so as to surround the two, are pressed simultaneously and are broken at once, the existing pipeline 100 can be efficiently disassembled. ..

Then, each broken segment 101a
As shown in FIG. 9, the secondary lining 102 is held from the inside by the arcuate contact surface 72 of each block 71 of the lining breaking device 70, and the outside (opposite to the lining breaking device 70). From the side), it is held by the cylindrical inner peripheral surface 17a of the fractured lining holding portion 17 of the front outer shell 3. Therefore, the segment 101a and the secondary lining 102 can be prevented from dropping when they are broken, and the existing pipeline 100 can be disassembled safely. That is, segment 101
Since the a and the secondary lining 102 on the inside thereof are fractured by pressing, 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 fractured segment 101a and the secondary lining 102 inside the segment 101a can be suitably retained via the fractured lining holding portion 17 and the lining fracture device 70.

Further, the second segment 101a from the rear of the existing pipeline 100 and the secondary lining 102 inside thereof are
Since the arcuate contact surfaces 42 and 62 of the blocks 41 and 61 of the grip devices 40 and 60 are held over the entire circumference from both inner and outer sides, the rearmost segment 101a and the inner secondary portion thereof are held. When the lining 102 is broken, it is possible to prevent the adjacent second segment 101a from the rear and the inner secondary lining 102 from being crushed. Therefore, the segment 101a and the secondary lining 102
Combined with the fact that it fractures by pressing, it is possible to reduce the generation of small pieces of concrete (rattle), and as described later, the segment 101a and the secondary lining 102 that have been fracture-removed can be easily carried out. You can do it. Also, the inner cylinder 5
The second segment 10 from the rear, which is located inside the
Since it is possible to prevent the 1a (existing pipeline 100) from being deformed, it is possible to suitably stop the space between the inner cylinder 5 and the segment 101a via a sealing device (not shown) attached to the inner cylinder 5. You can water it.

Next, the turning member 21 of the turning / moving device 20 is appropriately driven to rotate in the directions D + and D- (circumferential direction) shown in FIG.
The boom 23 is appropriately rotationally driven in the arrow E + and E- directions (front-back direction and radial direction) in FIG.
The tip member 27 is appropriately rotationally driven in the − direction (front-rear direction and radial direction), and the tip member 27 is appropriately rotationally driven in arrow H +, H− directions (front-rear direction and radial direction). And catch hawk 30
Is moved to the position of the predetermined segment 101a which has been broken and the secondary lining 102 inside thereof, and the gripping members 31, 3
1 is appropriately opened and closed in the directions of arrows M + and M- (radial direction) in FIG. 3 to move the segment 101a and the secondary lining 102.
Grab. At this time, as shown in FIG. 9, since the fractured lining holding portion 17 surrounding the fractured segment 101a and the secondary lining 102 is provided with a plurality of gripping grooves 17b, Outside of catch hawk 30 (upper side of FIG. 2)
The gripping member 31 of No. 2 is inserted into a predetermined gripping groove 17b of the fracture lining holding portion 17, and the gripping member 31 of the inside (lower side in FIG. 2) is
Is inserted into the gap between the predetermined blocks 71, 71 of the lining breaking device 70, the segment 101a and the secondary lining 102 can be suitably held via the catch hawk 30.

Next, the catch hawk 30 is moved in the front-rear direction, the radial direction and the circumferential direction via the turning movement device 20 while holding the broken segment 101a and the secondary lining 102. Then, the broken segment 101a and the secondary lining 102 are transferred onto a trolley (not shown) installed on the rail 51a of the work trolley 50, and pass through the cavity 55a so that the front of the work trolley 50 is (Fig. 2
Transport to the left). Further, a dolly or the like (not shown)
It is conveyed to the pit existing in front of the existing pipeline 100 via the and is carried out to the ground. That is, since the segment 101a and the secondary lining 102 are broken as a large lump, the broken segment 101a and the secondary lining 102 can be suitably grasped and transferred via the catch hawk 30, It can be conveniently carried out via a dolly or the like, and the work can be carried out more efficiently than in the case of finely crushing.

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.
2 is moved backward in the direction of arrow A- (front) in FIG. 2 and separated from the rear partition wall 7. Then, behind the rear partition wall 7 (on the right side in the figure), muddy water is filled from a mud pipe (not shown), and the pressure of the filled muddy water causes the rear partition wall 7 to move toward the rear outer shell 6 by an arrow. Move in the B-direction (forward). 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 the muddy water and the advance of the rear partition wall 7 in the arrow B-direction are stopped. At this time, the rear bulkhead 7 is provided with the jack 11 for propulsion.
The ram 11a, which has moved backward, becomes close to the ram 11a.

Then, the backfill material is pressed into the rear of the rear partition wall 7 through a backfill material transport pipe (not shown). at the same time,
Through the mud discharge pipe (not shown), the mud water filled in the rear of the rear partition wall 7 is discharged, and the back fill material is filled in the rear wall of the rear partition wall 7 in a form of replacing the mud water with the back filling material. .. The backfill material is a basic material produced by mixing water, sand and clay,
It is produced by mixing a binding material produced by mixing water and cement with 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 a quick-setting material is added to this to generate a backfill material, which is filled behind the rear partition wall 7.

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 wall 7). The filling of backfill material to the rear of the rear partition wall 7 by the movement of is performed in the backfill work space 6b at the rear of the replace shield machine 1, so that the dismantling work and the backfill work are performed separately and in parallel. It can be done and work can be done efficiently. 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, the work is carried out safely because the pressure is applied to the natural ground 200 and the backfilling completion portion 107 (backfilling material).

Thus, all the last segments 10
When 1a and the secondary lining 102 on the inside thereof are broken and removed and the backfill material is filled behind the rear partition wall 7 by the length L of one piece of the segment 101a, the ram 10a of the re-starting jack 10 is removed. In FIG. 2, it is retracted in the arrow C-direction (rearward).
Then, the rear outer shell 6 is fixed by friction with the outer ground material 200 and the backfill material (compacted) at the inner backfilling completion portion 107, so that the front outer shell 3 and the cutter 1 are fixed.
3 retreats slightly. Then, the bit of the cutter 13 that has been biting into the natural ground 200 (face) separates from the natural ground 200.

That is, since there is a difference in area (area projected from the front-rear direction) between the annular cutter 13 and the disk-shaped rear partition wall 7, the outer shells 3 and 6 and the cutter 13 are backfilled at the completion point 10.
It is in a state of being pressed forward by the pressure of the backfill material of 7. Therefore, when the rotation of the cutter 13 is temporarily stopped during the dismantling and backfilling work, the bit of the cutter 13 is kept in the ground 200.
Since it cuts into the (face), the cutter 13 cannot be rotationally driven again. Therefore, as described above, the front outer shell 3 and the cutter 13 are retracted with respect to the rear outer shell 6 and the natural mass 200, and the cutter 13 is separated from the natural mass 200 (cut face), so that the cutter 13 is again removed. It can be driven to rotate. In order to prevent the cutter 13 from digging into the natural ground 200 (face), a method of supporting the front outer shell 3 via the linings 101 and 102 of the existing pipeline 100 may be considered. Need to be installed in the dismantling work space 3b, which may interfere with the dismantling work due to interference with other devices. On the other hand, by retracting the front outer shell 3 via the re-starting jack 10 as described above,
It is possible to preferably eliminate the cutting of the cutter 13 into the natural ground 200 (face) without affecting the dismantling work.

Then, again, as described above, the cutter 1
3 is driven to rotate in the circumferential direction, and the jack 11 for propulsion is used.
Ram 11a of FIG. 1 is projected in the direction of arrow A + in FIG.
The length L of one piece of 01a is advanced. That is, by excavating the rock mass 200 outside the existing pipeline 100 by the cutter 13, the replace shield machine 1 (outer shells 3 and 6) can be advanced. And the outer shell 3,
6, the turning movement device 20, the work carriage 50, and the like are moved to move the catch hawk 30, the core removing device 34, the outer grip device 40, the inner grip device 60, the lining breaking device 70, and the like to the existing pipeline 100. Segment 101a
Further, it is possible to position the secondary lining 102 on the inside thereof in order, and the dismantling work and the backfilling work of the existing pipeline 100 can be continuously performed.

In the above embodiment, each roller 5
Although the work carriage 50 in which the third leg 52 is fixed to the frame 51 has been described, the leg 52 'of each roller 53 may be configured to be vertically movable as in the work carriage 50' shown in FIG. In the work carriage 50 'shown in FIG. 11, each leg 5
2'is mounted in such a manner that each roller 53 moves up and down, and can be rotatably driven in the directions of arrows R + and R- through a lifting jack 54 '. That is, the frame 51 has legs 5
2 ', a lifting jack 54' is pivotally mounted. A ram 54a 'is provided on the lifting jack 54' so as to be capable of projecting and retracting, and the ram 54a 'is pivotally attached to a leg 52'. Among the constituent elements of the work carriage 50 ', the same constituent elements as those of the work carriage 50 are designated by the same reference numerals, and the description thereof will be omitted. Therefore, the work carriage 5
When moving 0'in the existing pipeline 100, the leg 52 'is rotated in the arrow R-direction via the lifting jack 54', and the roller 53 is projected downward with respect to the frame 51. The inner grip device 60, the lining breaking device 70, and the like are used for lining 101, 102 of the existing pipeline 100.
It is possible to prevent the work carriage 50 'from moving smoothly because it can be prevented from interfering with the above.

[0048]

As described above, according to the present invention, in the dismantling apparatus of 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, It has a cylindrical outer shell such as the partial outer shell 3 and the rear outer shell 6 which is larger than the existing pipeline 100, and excavating means such as a cutter 13 is provided in front of the outer shell.
The ground material 200 is provided in a form of excavating in an annular shape corresponding to the shape of the outer shell, and the joint breaking means such as the core extracting device 34 is provided in a form of removing or cutting the joint member of the segment 101a. And the like. The lining breaking means such as is provided so as to press and break the segment 101a from which the joint member has been removed or cut by the joint breaking means, and a plurality of linings such as the block 41 are provided on the inner peripheral portion of the outer shell. Outside detention means,
The segment 101a is circumferentially connected in an endless annular shape so as to surround the segment 101a, and the segment 101a
In the form of projecting and retracting in the radial direction with respect to a, they are provided so as to be able to drive toward and away from each other in the circumferential direction, and a positioning means such as the work carriage 50 is provided so as to be movable inside the existing pipeline 100. A plurality of lining inner restraining means such as blocks 61 are connected to the means in an endless annular shape in the circumferential direction so as to surround the segment 101a from the inside and project and retract in the radial direction with respect to the segment 101a. In this case, since the rearmost segment 101a is ruptured through the lining breaking means, the second segment 1
01a via the lining outer side holding means and the lining inner side holding means, whereby the rearmost segment 101a is held.
Only the pipe can be broken, and the existing pipeline 100 can be disassembled safely. Further, by connecting a plurality of lining outer side holding means or a plurality of lining inner side holding means to drive them toward and away from each other in the circumferential direction, they can be projected and retracted in the radial direction, so that the pressing jacks 43, 63. The driving means for the outer lining holding means or the inner lining holding means can be arranged in a small space, and the existing pipeline 100 having a small diameter can be provided.
It is possible to deal with it appropriately. Also, segment 1
When the secondary lining 102 is formed inside 01a, the secondary lining 10 inside the rearmost segment 101a is formed.
2 is pressed together with the segment 101a through the lining breaking means, and the secondary lining 102 inside the second segment 101a from the rear is covered with the segment 101a and the lining outside holding means so as not to be crushed. By holding the lining inside the holding means, the secondary lining 102
Can be fractured as a large lump integrally with the segment 101a, and the occurrence of concrete debris can be reduced. Therefore, compared with the case where the secondary lining 102 is finely crushed, the fractured secondary lining 102 (along with the segment 101a) can be easily held and carried out, and the existing pipeline 100 can be safely and safely removed. Can be dismantled efficiently. Then, the ground 200 outside the existing pipeline 100 is excavated through the excavation means and the outer shell, the positioning means, etc. are moved, so that the lining outer side holding means and the lining inner side holding means etc. are predetermined. Can be positioned with respect to the segment 101a, and the dismantling work of the existing pipeline 100 can be continuously performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which excavation of a replace shield machine and removal of a joint bolt of a segment are performed in a dismantling backfill of an existing pipeline by the replace shield machine.

FIG. 2 is a cross-sectional view showing a manner in which a segment and a secondary lining on the inside of the segment are broken and removed, and a rear part of a rear partition wall is backfilled when the replacement shield machine is used for dismantling and backfilling an existing pipeline.

FIG. 3 is an enlarged view of the turning movement device, the catch hawk, and the core removing device shown in FIG.

FIG. 4 is a view of the outer grip device shown in FIG.

5 is an enlarged view of the work carriage, the inner grip device, and the lining breaking device shown in FIG.

6 is a VI arrow view of the work carriage shown in FIG. 5. FIG.

7 is a VII arrow view of the inner grip device shown in FIG. 5. FIG.

8 is a VIII arrow view of the lining breaking device shown in FIG.

FIG. 9 is a view of the broken lining holding portion shown in FIG.

FIG. 10 is a development view showing a joint portion of a segment of an existing pipeline.

FIG. 11 is a diagram showing a modified example of the work carriage shown in FIG. 5.

[Explanation of symbols]

 3 …… Outer shell (front outer shell) 6 …… Outer shell (rear outer shell) 13 …… Drilling means (cutter) 34 …… Joint breaking means (core removal device) 41 …… Outer lining retaining means ( Block ... 50 ... Positioning means (work cart) 61 ... Lining inside retaining means (block) 71 ... Lining breaking means (block) 100 ... Existing pipeline 101a ... Segment 101b ... Joint member ( Joint bolt) 102 …… Secondary lining 200 …… Right ground

Claims (1)

[Claims] 1. A dismantling device for an existing pipeline constructed by a plurality of segments connected to each other via a joint member, which has a tubular outer shell larger than the existing pipeline, and which is provided in front of the outer shell. , The excavation means is provided in the form of excavating the ground in a ring shape corresponding to the shape of the outer shell, the joint destruction means is provided in the form of removing or cutting the joint member of the segment, and the lining breaking means is provided. , A segment in which the joint member has been removed or cut by the joint breaking unit is pressed and ruptured, and a plurality of lining outer restraining units surround the segment from the outside in the inner peripheral portion of the outer shell. In the form of an endless ring in the circumferential direction, and in the form of projecting and retracting in the radial direction with respect to the segment, provided so as to be able to drive toward and away from each other in the circumferential direction, and positioning means is provided inside the existing pipeline. Free to move in Provided on the positioning means are a plurality of lining inner holding means, which are connected to each other in an endless annular shape in the circumferential direction so as to surround the segment from the inside, and project and retract in the radial direction with respect to the segment. Device for dismantling an existing pipeline, which is configured so as to be able to drive toward and away from each other in the circumferential direction.