JP2977982B2 - Dismantling device for existing pipeline - Google Patents

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 suitably dismantle the existing pipeline at the time of backfilling.

[0002]

2. Description of the Related Art When underground development has not progressed much,
In constructing a new pipeline, the existing pipeline is unlikely to be an obstacle.

[0003]

However, as the underground development progresses, the construction of a new pipeline may be hindered by the existence of the existing pipeline, and such an existing pipeline will be dismantled. The need arises.

[0004] In view of the above circumstances, an object of the present invention is to provide a dismantling device for an existing pipeline that can suitably dismantle the existing pipeline.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a joint member (1).
Existing pipeline (100) constructed by a plurality of segments (101a) connected to each other via a line 01b)
Of the disassembling apparatus, perforating means (59), the rotary drive
Freely and projecting against the segment (101a).
The drive means (40, 51, 5)
2, 54, 55) inside the existing pipeline.
Moving the punching means (59) relative to the segment;
It is provided freely .

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 on the drawings. The same applies to the following “action” column.

[0007]

According to the above construction, the segment (101a)
And a plurality of joint members (101b) for connecting the piercing means (59) so as to be positioned and changed in direction.

[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 replacement shield machine, FIG. 2 is a view of the cutter of the replacement shield machine shown in FIG.
1 is a view of the grip device in the pipeline of the replacement shield machine shown in FIG. 1 as viewed in the direction of an arrow III. FIG. 4 is a view of the segment gripping device of the replacement shield machine shown in FIG.
, FIG. 6 is an enlarged view of a segment crushing device of the replacement shield machine shown in FIG. 5, FIG. 7 is an enlarged view of a segment gripping device of the replacement shield machine shown in FIG. 5, FIG. FIG. 9 is a view of the segment gripping device shown in FIG. 7 taken in the direction of arrow VIII, FIG. 9 is a view of the segment gripping device shown in FIG. 7 taken in the direction of arrow IX, and FIG. X arrow view enlarged view, FIG.
Is an enlarged view of the core removing device of the replacement shield machine shown in FIG. 5, FIG. 12 is a view taken along the arrow XII of the core removing device shown in FIG. 11, and FIG. 13 shows a modification of the core removing device shown in FIG. FIG. 14 is an enlarged view of the core removing device of the replacement shield machine shown in FIG. 5, FIG. 15 is a view taken along the arrow XV of the core removing device shown in FIG. 14, and FIG. FIG.

As shown in FIG. 1 or FIG. 2, an existing pipeline 100 (tunnel) to be dismantled and backfilled has a cylindrical primary lining 101 and a secondary lining 102 (concrete) formed inside thereof. ) In FIG. 1 to extend in the left-right direction. As shown in FIG. 10, the primary lining 101 divides a plurality of arc-shaped segments 101a into a front-rear direction (a pipe direction perpendicular to the plane of FIG. 10) and a circumferential direction (a direction perpendicular to the pipe direction). (In the direction of the ring), in a form assembled into a cylindrical shape. That is, one segment 10
As shown in FIG. 16, two bolt portions BP are provided at both ends in the circumferential direction (vertical direction in FIG. 16), respectively. Four bolt portions BP 'are provided. The segment 101a is connected to the adjacent segment 101a via a joint bolt 101b at each of the bolt portions BP and BP '. In FIG. 16, the bolt part BP 'at the rear end (right end in the figure) is the joint bolt 1
01b, and shows a state in which the segment 101a existing behind (rightward in the figure) has already been removed.
The existing pipeline 100 for dismantling and backfilling is a primary lining 101
(The segment 101a) alone (that is, the secondary lining 102 need not necessarily be formed). Further, the number of the bolt portions BP and BP 'of each segment 101a does not necessarily have to be two or four.

As shown in FIG. 5, the replace shield machine 1 has a front shell (skin plate) 3 and a rear shell 6, and the front shell 3 and the rear shell 6 are indicated by an arrow A +. , A-
It is connected so as to be relatively movable in the direction (front-back direction). That is, the front shell 3 and the rear shell 6 are formed in a cylindrical shape having the same radius, and the rear end of the front shell 3 (FIG. 5).
The middle end (right end) and the front end (left end in the figure) of the rear shell 6 are slidably adhered to each other via a seal device 9. A plurality of (the same number as the propulsion jacks 11 described later) restarting jacks 1 are provided at the front end of the inner peripheral portion of the rear outer shell 6.
0 (hydraulic jack or the like) is arranged along the inner peripheral surface of the rear outer shell 6 and is pivotally connected via a pin 6a. A ram 10a is provided on each restarting jack 10 so as to be able to protrude and retreat freely. . still,
The restarting jack 10 can also be used as a direction correcting jack.

At the front of the inner periphery of the front outer shell 3, a front partition 4 formed in an annular shape is provided. 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) is provided on the inner periphery of the front partition wall 4. 5 is provided with a sealing device (not shown) on the inner peripheral surface.

Then, in front of the front partition 4 (left side in FIG. 5).
In FIG. 2, a cutter 13 is provided so as to be rotatable in the directions indicated by arrows B + and B- in FIG. 2 via a turning motor 14 (hydraulic motor or the like) shown in FIG. The outer diameter of the cutter 13 is substantially the same as the outer diameter of the outer shells 3 and 6, as shown in FIG.
The inner diameter is formed in an annular shape having substantially the same size as the outer diameter of the existing pipeline 100 (primary lining 101), and a number of bits 13a are provided on the front surface (left surface in FIG. 5) of the cutter 13. ing.

Further, a mud feed pipe 16 is provided above the front partition 4.
Are connected in such a manner that the discharge port communicates with the front of the front partition wall 4 (left side in FIG. 5), and at the lower part of the front partition wall 4, a drain pipe 17 has a suction port connected to the front partition wall. 4 is connected to the front (left side in the figure). As shown in FIG. 3, the mud feed pipe 16 and the mud discharge pipe 17 pass through a passage hole 40a of a pipe base 40, which will be described later, in front of the existing pipe 100 (left side in FIG. 1). It extends to an existing stand (not shown) and is connected to a mud treatment plant (not shown) that is present on the ground.

As shown in FIG. 5, a holding device supporting portion 8 is provided inside the rear outer shell 6. A dismantling work space 3b is formed inside the outer shells 3 and 6 in front of the gripping device support portion 8 (left side in the figure), and behind the gripping device support portion 8 (right side in the figure). Inside the rear shell 6, a back-filling work space 6b (moving space for a rear partition 7 described later) is formed. A through hole 8a is formed in the center of the gripping device supporting portion 8 so as to penetrate the disassembling work space 3b and the backfill work space 6b in the front-rear direction (the left-right direction in the drawing).

A plurality of propulsion jacks 11 (hydraulic jacks, etc.) are provided behind the gripper supporting portion 8 (right side in FIG. 5).
The ram 11a is fixed to the rear outer shell 6 so as to be arranged along the inner peripheral surface thereof.
It is provided so that it can be protruded and retracted in the + and C- directions (front and rear directions).

A rear partition 7 is provided inside the rear outer shell 6 behind (to the right in FIG. 5) the propulsion jack 11. The rear bulkhead 7 is formed in a disk shape having an outer diameter substantially equal to the inner diameter of the rear outer shell 6 so as to block the backfill working space 6 b back and forth. Arrow D
It is provided movably in the + and D- directions (front-back direction). The back partition 7 is connected to a backfill material transport pipe 18 in such a manner that the discharge port communicates with the rear of the rear partition 7 (to the right in the figure). The backing material transport pipe 18 passes through a passage hole 8a of the gripping device support portion 8 and, as shown in FIG. It extends to the front of the inner base 40 (left side in FIG. 1), and is connected to a backfill material plant (not shown) existing in the existing pipeline 100 or on the ground.

On the inner peripheral surface of the front outer shell 3 of the dismantling work space 3b, as shown in FIG.
0 is provided. The segment crushing device 20 is provided with a swiveling moving member 22 that can be driven to move in the circumferential direction of the front outer shell 3. That is, on the inner peripheral surface of the front outer shell 3,
As shown in FIG. 6, the guide rail 21a and the pin gear 21
b is fixed along the inner peripheral surface of the front outer shell 3 in the circumferential direction (perpendicular to the plane of FIG. 6). A roller 22a is provided on the swiveling member 22, and the roller 22a is engaged with the guide rail 21a. A turning motor 23 (such as a hydraulic motor) is fixed on the turning movement member 22.
The pinion gear 23a is rotatably connected in the directions of arrows E + and E-. And the pinion gear 23a
Are meshed with the pin gear 21b. The crushing member 25 is provided on the swing moving member 22 with the crushing jack 2.
4 (hydraulic jack or the like), it is provided so as to protrude and retreat freely in the directions of arrows F + and F- (radial direction of the front shell 3).

As shown in FIG. 5, a grip device 26 is provided on the inner peripheral surface of the front partition 3 of the dismantling work space 3b.
It is provided so as to be disposed forward (leftward in the figure) of the segment crushing device 20. A plurality of arc-shaped pressing members 28 are provided on the grip device 26 in the directions of arrows G + and G- (radial direction of the front outer shell 3) via pressing jacks 27 (such as hydraulic jacks). It is provided so as to be able to protrude and retreat freely. An electric hoist 29 is provided on the inner peripheral surface of the front partition wall 3.

Inside the outer shells 3 and 6 of the disassembling work space 3b, a segment gripping device 30 is provided.
It is provided so as to be located behind (rightward in the figure) from 0. The segment gripping device 30 includes a turning member 32,
4 via a turning motor 31 (hydraulic motor or the like) supported by the rear outer shell 6 via the gripping device support 8.
It is provided so as to be rotatable in the directions of arrows H + and H- (the circumferential direction of the outer shells 3 and 6). On the revolving member 32, a telescopic member 32 'is provided with a vertically moving jack 33 (a hydraulic jack or the like).
5 is provided so as to be movable in the directions of arrows J + and J- (radial directions of the outer shells 3 and 6) in FIG. An outer cylinder 34 is fixed to the elastic member 32 '.
7, the inner cylinder 36 is moved by arrows K +, K- through a front-rear movement jack 35 (hydraulic jack or the like).
It is provided so as to be movable in the direction (front-back direction). At the front end (the left end in FIG. 7) of the inner cylinder 36, two sets of catch forks 37 are arranged at predetermined angular intervals in the circumferential direction of the outer shells 3, 6 as shown in FIG. Is provided.
In the catch fork 37, gripping members 39, 39 are moved by arrows N through gripping jacks 38 (hydraulic jacks or the like).
It is provided to be able to open and close in the + and N- directions (radial directions of the outer shells 3 and 6).

As shown in FIG. 5, the replacement shield machine 1 has an in-pipe base 40, and the in-pipe base 40 has an inner diameter of the existing pipe 100 (secondary lining 102). It is formed in a cylindrical shape having a sufficiently small outer diameter.
In the center of the pipe base 40, there is a passage hole 40a.
Is the dismantling work space 3b in the outer shells 3 and 6 and the existing pipeline 100
It is penetrated through the front and rear so as to communicate the space inside.
A plurality of grip devices 4 are provided on the outer peripheral portion of the in-pipe base 40.
1, 46, 46 are provided.

The bar-type grip device 41 includes a moving member 4.
3 are arrows M +, M- relative to the pipe base 40 via the moving jack 42 (hydraulic jack or the like).
It is provided so as to be movable in the direction (front-back direction). That is, a plurality of moving jacks 42 are fixed to the moving member 43, and each moving jack 42 has a ram 42a.
Are provided so as to be able to protrude and retreat freely. The ram 42a is fixed to the pipe base 40. Then, on the moving member 43, eight rod-shaped pressing members 45 are provided.
, Through the pressing jack 44, arrows P + and P- in FIG.
It is provided so as to protrude radially in the direction (radial direction of the in-pipe base 40) and to be retractably driven.

The column-type grip device 46 has four pressing members 48 via a columnar member 47 which can be extended and retracted, as shown in FIG.
It is provided so as to protrude and retreat in the directions of arrows Q + and Q- (vertical direction (vertical direction in the figure) or lateral direction (horizontal direction in the figure)). The pressing member 48 is formed in an arc shape obtained by equally dividing the circumference into four parts, and is also provided in the front-rear direction (the left-right direction in FIG. 5).
Is fixed to the pipe base 40.

Further, on the outer peripheral portion of the in-pipe base 40, 2
Different types of coring 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 through the turning motor 51, the guide rail, etc. shown in FIG.
(In the circumferential direction). The turning mechanism of the turning member 52 is the same as the turning mechanism of the turning member 22 of the segment crusher 20 described above. On the turning movement member 52, a fine movement member 54 is moved through arrows for fine adjustment 53 in the directions of arrows S + and S− (the base 40 in the pipeline).
(In the circumferential direction), and a core removing device 50 is provided on the fine movement member 54. Also,
A fine movement member 54 ′ is provided on the turning movement member 52 via a fine adjustment jack 53 ′ so as to be movable in the directions of arrows T + and T− (the circumferential direction of the base 40 in the pipeline).
On the fine movement member 54 ', a coring device 50' is provided.

As shown in FIG. 11, the core removing device 50 is provided with two rod-shaped support members 56 at predetermined intervals in the front-rear direction (the left-right direction in the drawing) (the interval between bolt portions BP of the segment 101a to be described later). FIG. 12
As shown in the figure, the fine movement member 54 is rotatably driven in the directions of arrows U + and U- via an angle changing jack 55 (hydraulic jack or the like). That is, the lower end of each support member 56 is pivotally attached to the fine movement member 54 via the pin 54a. An angle changing jack 55 is pivotally attached to the fine movement member 54 via a pin 54b.
A ram 55a is provided on the angle changing jack 55 so as to be able to protrude and retract. The ram 55a is pivotally attached to the support member 56 via a pin 56b. On each support member 56, a traveling member 58a is provided with a traveling motor 57a.
(Hydraulic motor or the like) is provided so as to be movable in the directions of arrows Z + and Z- along the support member 56 so as to be freely movable. That is, a traveling motor 57 is fixed on the traveling member 58a, and a pinion gear (not shown) is rotatably connected to the traveling motor 57. The pinion gear is mounted on a rack 56 fixed on the support member 56.
a. Then, on the traveling member 58a,
A core boring machine 58 is fixed, and a core cutter 59 is provided on the core boring machine 58 so as to be rotatable in the directions of arrows W + and W- via an electric motor (not shown). The core cutter 59 is formed in a cylindrical shape, and a large number of bits 59a are fixed to an upper edge of the core cutter 59.

FIG. 12 shows a case where the angle changing jack 55 is arranged on the same side (the right side in the figure) as the core cutter 59 with respect to the support member 56, but FIG.
As shown in FIG. 3, the angle changing jack 55 may be disposed on the opposite side (left side in the drawing) of the core cutter 59 with respect to the support member 56.

The core removing device 50 'is provided with four rod-shaped support members 56', as shown in FIG.
A predetermined angular interval in the circumferential direction of the
(Same as the angular interval of the bolt portions BP '), and are arranged in a form extending in the radial direction of the in-pipe base 40,
As shown in FIG. 14, it is provided fixed to the fine movement member 54 '. On each support member 56 ', a core boring machine 58 and a core cutter 59 are mounted on the rack 5.
6a, the traveling motor 57, the traveling member 58a, etc.
It is provided so as to be movable in the directions of arrows Y + and Y- (radial direction of the in-pipe base 40) along the support member 56 '. Note that among the components of the core removing device 50 ′, the same components as those of the core removing device 50 are denoted by the same reference numerals, and description thereof will be omitted.

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 figure). The front end (the left end in the figure) of the roller conveyor 61 is supported via a conveyor moving device 62 on a rail 67 a laid in the existing pipeline 100 so as to be movable in the front-rear direction so as to be movable. Further, the rear end (the right end in the figure) of the roller conveyor 61 is connected to the conveyor pedestal 6 provided on the gripping device support 8.
3 is supported.

Existing pipeline 100, replacement shield machine 1
Has the above configuration, when the existing pipeline 100 is dismantled and buried using the replacement shield machine 1, the existing pipeline 100 is surrounded by the outer shells 3 and 6 from the outside, and the inner cylinder 5. The replacement 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 base 40 in the pipeline is arranged inside the existing pipeline 100.

Then, through the mud pipe 16, the front partition 4
The pressurized muddy water is supplied to the front (left side in FIG. 5) of the cutter to press the face, and the cutter 13 is moved through the turning motor 14 in FIG.
It is rotationally driven in the direction of the arrow B + (or B-). At the same time, push the ram 11a of the propulsion jack 11 in the direction of arrow C + (rearward)
, And presses the rear partition 7 so as to obtain a reaction force from the back-filled portion 107 at the rear (right side in FIG. 1) of the rear partition 7 so as to obtain a reaction force through the outer shells 6 and 3. To the front (face side).

Then, the existing pipeline 1 is operated by the cutter 13.
The ground 200 outside the primary lining 101 (segment 101a) is excavated, and a hole 200b is formed in an annular shape corresponding to the outer diameter of the outer shells 3 and 6. At the same time, the outer shells 3, 6 (and the front bulkhead 4, the inner cylinder 5, etc.) move forward while being inserted into the excavated hole 200b. At this time, the inner cylinder 5
Between the inner lining 101 and the primary lining 101 (segment 101a)
The water is stopped by a sealing device (not shown) provided on the inner peripheral surface.

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 7 is moved to the rear end of the rear outer shell 6 (right end in FIG. 5).
, And the segment 101a of the existing pipeline 100 (and the secondary lining 102 inside it) projects into the dismantling work space 3b inside the front outer shell 3. At this time, the last segment 10 (rightmost in FIG. 5)
1a is located inside the segment crushing device 20, and the second segment 101a from the rear is located inside the grip device 26. In this state, the advancement 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 restarting jack 10 is projected in the direction of arrow A + (forward).

Next, the in-pipe base 40 is moved in the front-rear direction (horizontal direction in FIG. 5) to remove the cores 50 and 50 '.
And the core cutter 59 is a bolt portion B of the segment 101a.
It is positioned at a predetermined position that can match P, BP '. That is, the pressing member 48 of the column type gripping device 46 is pressed by the arrow Q + so as to press the secondary lining 102 via the columnar member 47.
The pipe base 40 is fixed to the existing pipe 100 by protruding in the direction (outward). Then, in a state where the pressing member 45 of the bar-type grip device 41 is retracted in the arrow P- direction (inward) through the pressing jack 44, the moving member 43 is moved through the moving jack 42 by the arrow. M +, M
Move in the minus direction (front-back direction) as appropriate. Next, the moving member 43 is fixed to the existing pipeline 100 by pressing the pressing member 45 of the bar-type grip device 41 in the direction of the arrow P + (outward) so as to press the secondary lining 102. Then, with the pressing member 48 of the column-type gripping device 46 retracted in the direction of the arrow Q- (inward), the base 40 in the pipeline is moved through the jack 42 for movement in the directions of arrows M + and M- )
Move to as appropriate.

Then, the swiveling member 52 of the coring devices 50, 50 'is appropriately moved via the turning motor 51 in the directions R + and R- (circumferential direction) shown in FIG. Let it. Next, the fine movement members 54 and 54 'are appropriately moved in the directions of arrows S + and S- and arrows T + and T- (peripheral direction) to predetermined positions via the fine adjustment jacks 53 and 53'. And each core cutter 5 of the core removing device 50
9, the last predetermined segment 101a shown in FIG.
The core cutter 59 of the coring device 50 'is positioned so as to align with the bolt portion BP in the circumferential direction (ring direction).
Is positioned so as to be aligned with the bolt portion BP ′ in the front-rear direction (the pipe direction) of the segment 101a.

Then, each core cutter 59 is connected to an electric motor (not shown) in the core boring machine 58 by using
12 or 14 While being rotationally driven in the direction of the arrow W + (or W-), it is moved in the direction of the arrow Z + or the direction of the arrow Y + (radially) via the traveling motor 57. Then, the secondary lining 102 and the segment 101a are pierced by the core cutter 59, and the bolt portions BP, B shown in FIG.
Each joint bolt 101b of a predetermined segment 101a is removed by hollowing out P '. Since the core removing device 50 is provided with two core cutters 59, two bolt portions B in the circumferential direction (ring direction) of the segment 101a are provided.
P joint bolt 101b can be removed at the same time,
Further, since the core removing device 50 'is provided with four core cutters 59, the joint bolts 101b of the four bolt portions BP' in the front-rear direction (the pipe direction) of the segment 101a are provided.
Can be removed at the same time, and the working time can be shortened. At this time, the traveling motor 57 (hydraulic motor or the like) is automatically controlled based on the current of the electric motor that rotationally drives the core cutter 59, and the secondary lining 10 of the core cutter 59 is
2 and the pressing force against the segment 101a can be adjusted. The pressing force of the core cutter 59 may be adjusted by manually controlling the traveling motor 57.

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 (in the radial direction), the joint bolt 1 of the key segment 101a (K) is not formed.
To remove 01b, the supporting member 56 of the core removing device 50 is appropriately rotated in the directions indicated by arrows U + and U− in FIG. 12 through the angle changing jack 55, and the direction of the supporting member 56 (the moving direction of the core cutter 59) is changed. (Arrows Z +, Z- directions))
Are appropriately changed so as to match the joint surface 101k. Segment 1 other than key segment 101a (K)
When the joint bolt 101b of the core removal device 01a is removed, the direction of the support member 56 of the core removal device 50 (the moving direction of the core cutter 59 (arrows Z + and Z- directions)) is changed.
Like the support member 56 'of 0', it is oriented in the radial direction of the in-pipe base 40.

Accordingly, the coring devices 50, 5 are connected to the large number of joint bolts 101b connecting the segments 101a.
Since the positioning and the change of the orientation of the core cutter 59 of 0 'can be suitably performed, a large number of joint bolts 101b can be efficiently removed. The joint bolts 101b of the two bolt portions BP in the circumferential direction of the segment 101a shown in FIG. 16 are simultaneously removed via the two core cutters 59, and the joint bolts 101b of the four bolt portions BP 'in the front-rear direction are removed. Although the case where the removal is performed at the same time through the two core cutters 59 has been described, the bolts BP and BP 'are sequentially positioned through the one core cutter 59,
The joint bolt 101b may be removed.

Next, the in-pipe base 40 is moved in the front-rear direction in the same manner as the positioning of the coring devices 50 and 50 '. Then, the pressing member 48 of the column type grip device 46 on the in-pipe base 40 is positioned at the position GP shown in FIG. 5, and the linings 102 and 101 are sandwiched between the pressing members 48 on the inner peripheral surface of the front outer shell 3. To the pressing member 28 of the grip device 26. Then, the pressing member 28 of the grip device 26 is made to protrude in the direction of arrow G + via the pressing jack 27,
The second segment 101a from the rear (the right end in FIG. 5) is pressed from the outside. At the same time, the pressing member 48 of the grip device 46 is made to protrude in the direction of the arrow Q + via the columnar member 47 so that the secondary lining 10 inside the segment 101a is pressed.
2 is pressed from the inside.

The segment crusher 20 shown in FIG.
The turning movement member 22 is rotated in the circumferential direction (perpendicular to the plane of FIG. 6) with respect to the front outer shell 3 via the turning motor 23.
Move to as appropriate. Then, the crushing member 25 is positioned outside the rear end (the right end in FIG. 5) of the predetermined segment 101a from which the joint bolt 101b has been removed.

Next, the telescopic member 32 'and the outer cylinder 34 of the segment gripping device 30 are appropriately moved in the directions of arrows J + and J- (radial direction) in FIG. That is, the position of the catch fork 37 can be adjusted according to the thickness of the linings 101 and 102 of the existing pipeline 100. In addition, the turning member 32 is appropriately rotated in the directions indicated by arrows H + and H- (circumferential direction) in FIG. Then, the catch hawk 37 is connected to the joint bolt 1
Positioning is performed after the segment 101a from which 01b has been removed and the secondary lining 102 inside the segment 101a (to the right in FIG. 5).
Then, the catch members 39, 39 of the catch fork 37 are
The catch fork 37 is moved in the direction of arrow K + (forward) through the jack 35 for forward / backward movement while being opened in the direction of arrow N + in FIG. Then, the segment 101a and its inner secondary lining 10
2 is inserted between the catching members 39 of the catch fork 37. The segment crusher 20 is inserted between the two catch forks 37, 37 shown in FIG. Then, the gripping members 39, 39 of the catch fork 37 are slightly closed in the arrow N-direction of FIG. 7 via the gripping jack 38, and the gripping members 39, 39 and the segment 101a or the inner two A slight gap is provided between the next linings 102.

Next, the crushing member 25 of the segment crushing device 20 is projected through the crushing jack 24 in the direction indicated by the arrow F + in FIG. Then, the last predetermined segment 101a and the inner secondary lining 102 thereof are pressed inward by the crushing member 25, and are slightly bent with respect to the adjacent segment 101a and the inner secondary lining 102 thereof. , The secondary lining 102 is cracked so that the adjacent segment 101a and the inner secondary lining 102
(The existing pipeline 100) is broken. Segment 101
As soon as a and the secondary lining 102 are broken, the gripping member 3 of the catch fork 37 of the segment gripping device 30
9, 9 and 39 are closed in the direction of arrow N- through the gripping jack 38, and the broken segment 101a and the secondary lining 102 are gripped. That is, since the segment 101a and the secondary lining 102 inside the segment 101a are broken by pressing, the adjacent segments 101a are integrally formed as a large lump while maintaining the arc shape of each piece. And it can be broken from the secondary lining 102 (existing pipeline 100) inside it. Therefore, the broken segment 10
1a and the secondary lining 102 inside it can be suitably grasped as a large lump through the catch hawk 37, and small pieces of concrete (glass) do not fall and fall. Can do work. Further, the broken segment 101a and the secondary lining 102
Can be carried out and removed as a large lump, as described later, so that the work efficiency can be improved as compared with the case of carrying out and removing as a large number of small concrete pieces.

The second segment 101 from the rear
a and its inner secondary lining 102 are grip devices 2
Since the rearmost segment 101a and the secondary lining 102 inside the segment 101a are ruptured because they are held by the pressing members 28, 48 at 6, 46, the second adjacent segment 101a from the rear and the inside thereof are broken. Secondary lining 102
Can be prevented from being crushed. Therefore, in combination with the breaking in the form of pressing the segment 101a and the secondary lining 102, the generation of small pieces of concrete can be reduced, and as described later, the broken segment 101a and the secondary The worker 102 can be easily carried out and removed. Also, the second segment 10 from the rear
1a can be kept in close contact with the sealing device (not shown) of the inner cylinder 5, and water can be suitably stopped between the inner cylinder 5 and the existing pipeline 100 (segment 101a).

Next, the catch hawk 37 is moved in the direction of arrow K- (rearward) in FIG. 5 while the broken segment 101a and the secondary
2 is appropriately rotated in the directions indicated by arrows H + and H- (circumferential direction) in FIG. 4, and the telescopic member 32 'and the outer cylinder 34 are moved by arrows J + and J +.
Move in the minus direction (radial direction) as appropriate. Then, the broken segment 101 a and the secondary lining 102 are placed on the bottoms of the outer shells 3 and 6.

When the breaking and removal of one segment 101a and the secondary lining 102 inside the segment 101a are completed, the crushing member 25 of the segment crushing device 20 and the catch fork 37 of the segment gripping device 30 are appropriately moved in the circumferential direction. By turning, the last segment 101a and the secondary lining 102 inside the segment 101a are sequentially broken and removed in the circumferential direction. That is, the segment crushing device 20, the segment grasping device 30
Can be swiveled, so that the single segment crushing device 20 and the segment gripping device 30 perform the breaking and removing operation of the plurality of segments 101a connected in the circumferential direction and the secondary lining 102 inside the segments 101a. I can do it.
In the dismantling work of the existing pipeline 100, for all the segments 101 a at the rear, after the work of removing the joint bolt 101 b by the coring devices 50 and 50 ′ is performed at once, the breaking operation by the segment crushing device 20 is performed. It may be performed in a lump, and for each segment 101a, the joint bolt 101b by the coring device 50, 50 '.
May be sequentially performed and the breaking operation by the segment crusher 20 may be performed sequentially.

Next, the broken segment 101a and the secondary lining 102 are transferred onto the roller conveyor 61 via the electric hoist 29, and pass through the passage hole 40a via the roller conveyor 61. It is transported forward (left side in FIG. 1) of the base 40 in the pipeline. And electric hoist 6
5 and transferred onto a carriage 67, and via the carriage 67,
It is conveyed to a stand existing in front of the existing pipeline 100 and carried out 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.
02 can be easily carried out via the carriage 67 and the like.

As described above, while the segment 101a of the existing pipeline 100 and the secondary lining 102 are being dismantled and removed, the propulsion jack 11 pressing the rear bulkhead 7 has been removed.
Is retracted in the direction of arrow C- (forward) in FIG. 5 to separate it from the rear partition 7. The muddy water is filled from the mud pipe (not shown) behind the rear bulkhead 7 (right side in FIG. 1), and the rear bulkhead 7 is drawn with respect to the rear shell 6 by the pressure of the filled muddy water. 5 arrow D + direction (front)
Move to Then, the rear partition 7 is connected to the existing pipeline 100.
When the segment 101a is advanced by the length L of one piece, the filling of the muddy water and the advance of the rear partition 7 in the direction of arrow D + are stopped. At this time, the rear partition wall 7 is in a state of being close to the retreated ram 11a of the propulsion jack 11.

Then, the backfill material 106 is transferred to the backfill material transport pipe 1.
8 and press-fit behind the rear partition 7. At the same time, the muddy water filled behind the rear bulkhead 7 is discharged through a mud pipe (not shown), and the backfill material 106 is replaced with the backfill material 106 by replacing the muddy water with the backfill material 106. Fill backwards.
The backfill material 106 is generated by a base material made of water, sand and clay, a binder made of water and cement, and a quick-setting material. That is, the base material and the binding material are separately generated, and are conveyed from the stand existing in front of the existing pipeline 100 to the vicinity of the replacement shield machine 1 by pumping, conveyance by a bogie, or the like. Then, in the vicinity of the replacement shield machine 1, the base material and the binder are kneaded, a quick-setting material is added thereto, and the manufactured backfill material 106 is supplied to the backfill material transport pipe 18.

The dismantling work (removal of the segment 101a and the secondary lining 102 from the existing pipeline 100) is performed in the dismantling work space 3b at the front of the replacement shield machine 1, and the backfilling work (rear bulkhead 7) is performed. Is carried out in the back-filling work space 6b at the rear of the replacement shield machine 1, the disassembling operation and the back-filling operation are performed separately and in parallel. And workability can be improved. The dismantling work and the backfilling work are performed in the working spaces 3b and 6 inside the outer shells 3 and 6.
In b, since the operation is performed in such a manner as to oppose the pressure of the backfill material 106 at the ground 200 and the backfilling completion point 107, the work can be performed safely.

Thus, all the last segments 10
When the back lining 1a and the inner secondary lining 102 are broken and removed and the backfill material 106 is filled behind the rear bulkhead 7 by one piece length L of the segment 101a, the ram 10a of the restarting jack 10 Is retracted in the direction of arrow A (rearward) in FIG. Then, the rear outer shell 6 is fixed by friction with the outer ground 200 and the backfill material 106 (compacted) at the inner backfill completion point 107, so that the front outer shell 3 is fixed.
And the cutter 13 is slightly retracted. And Chiyama 200
The bit 13 a of the cutter 13 that has been bitten into the (face) separates from the ground 200.

That is, since there is a difference in the area between the annular cutter 13 and the disk-shaped rear partition wall 7 (the area projected from the front and rear directions), the outer shells 3 and 6 and the cutter 13
7 is pressed forward by the pressure of the backfill material 106. Therefore, when the rotation of the cutter 13 is temporarily stopped during the disassembling and backfilling operation, the bit 13a of the cutter 13 bites into the ground 200 (face), and the cutter 13 cannot be driven to rotate again. Therefore, as described above, the front shell 3 and the cutter 13 are retracted with respect to the rear shell 6 and the ground 200, and the cutter 13 is separated from the ground 200 (face), whereby the cutter 13 is again moved. It can be driven to rotate. In addition, the ground 200 of the cutter 13
In order to prevent biting into the (face), a method of supporting the front outer shell 3 through the linings 101 and 102 of the existing pipeline 100 is also conceivable, but a supporting means is installed in the dismantling work space 3b. It is necessary, and interference with the segment crushing device 20 or the like may hinder dismantling work. On the contrary,
As described above, the front shell 3 is connected via the restarting jack 10.
, The cutting of the cutter 13 into the ground 200 (face) can be suitably eliminated without affecting the dismantling work.

Next, the cutter 1 is again operated as described above.
2 is driven in the direction of arrow B + (or B-) in FIG. 2 and the ram 11a of the propulsion jack 11 is projected in the direction of arrow C + in FIG. Is advanced by one piece length L. That is, the existing pipeline 100 is
By excavating the ground 200 outside the canal, the replacement shield machine 1 can be advanced, and the existing pipeline 10
0 dismantling work and backfilling work can be performed continuously.

[0051]

As described above, according to the present invention , in the dismantling device for the existing pipeline 100 constructed by a plurality of segments 101a connected to each other via a joint member such as a joint bolt 101b, Core cutter 59
And the like are rotatably driven and the segment
Protruding and retractable with respect to the
Base 40, turning motor 51, turning moving member 52, fine movement
Movement driving means such as the member 54 and the angle changing jack 55
The drilling means inside the existing pipeline,
It is configured to be movable and movable with respect to the segment
Thus, the positioning and the direction of the perforation means can be suitably changed for a large number of joint members connecting the segments 101a. Therefore, many joint members can be efficiently removed or cut, and the existing pipeline 100 can be efficiently dismantled.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing how an existing pipeline is dismantled and backfilled by a replacement shield machine.

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

FIG. 3 is a view of the grip device in the pipeline of the replacement shield machine shown in FIG.

FIG. 4 is a view of the segment gripping device of the replacement shield machine shown in FIG.

FIG. 5 is an enlarged view of the replacement shield machine shown in FIG.

FIG. 6 is an enlarged view of the segment crusher of the replace shield machine shown in FIG.

FIG. 7 is an enlarged view of a segment gripping device of the replacement shield machine shown in FIG.

8 is a view of the segment gripping device shown in FIG.

FIG. 9 is a view of the segment gripping device shown in FIG.

FIG. 10 is an enlarged view of the core removing device of the replacement shield machine shown in FIG.

FIG. 11 is an enlarged view of a core removing device of the replacement shield machine shown in FIG. 5;

12 is a view of the core removing device shown in FIG.

FIG. 13 is a view showing a modification of the coring device shown in FIG.

14 is an enlarged view of the core removing device of the replacement shield machine shown in FIG.

FIG. 15 is a view of the core removing device shown in FIG.

FIG. 16 is a development view showing a joint portion of a segment of an existing pipeline.

[Explanation of symbols]

 40 positioning means (in-pipe base) 52 positioning means (turning member) 54 positioning means (fine movement member) 56 supporting means (supporting member) 59 punching means (core cutter) 100: Existing pipeline 101a: Segment 101b: Joint member (joint bolt)

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E21F 15/00 E21D 9/06 301

Claims (1)

(57) [Claims] A plurality of joints connected to each other via a joint member;
Of existing pipeline constructed by segment,For dismantling equipment
AndThe perforating means is rotatably driven and is connected to the segment.
It is provided to be able to protrude and retreat freely, Moving the moving drive means inside the existing pipeline,
Means is provided so as to be movable and movable with respect to the segment,
 Disassembly device for existing pipelines.