JP2002227586A - Tunnel back filling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel back filling device capable of suppressing inundation in a body when performing tunnel back filling work to improve the sealing property. SOLUTION: This tunnel back filling device is constituted such that the body 11 consists of a front body 12, an intermediate body 13, and a rear body 14, the body 11 advances due to expansion and shrinkage of a drilling jack 35 to excavate outer surroundings of an existing tunnel T by a cutter head 17, the existing tunnel T is dismantled in the body 11, and a back filling material is filled into a rear space part to back fill the tunnel. A first pressurizing seal member 62 and a second pressurizing seal member 63 are provided between the front body 12 and the existing tunnel T to constitute each seal member 62, 63 by seal cases 67, 75, hollow seals 69, 76, and a soft seal 70.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel backfill apparatus applied to an operation for disassembling and backfilling a tunnel structure buried underground.

[0002]

2. Description of the Related Art As an apparatus and a construction method for removing and backfilling a tunnel already constructed underground, for example, "Tunnel backfill method and shield backfill apparatus" described in JP-A-4-7490 is disclosed. There is.

What is disclosed in the “tunnel backfill method and shield backfill device” described in this publication is as follows:
An inner cylinder fitted to the outer diameter of the segment (tunnel) is provided, and an outer shell is connected to the inner cylinder with a partition, and an annular cutter (face plate) is provided in front of the partition between the inner cylinder and the outer shell. On the other hand, a propulsion jack is provided behind the partition wall, and a core cutter that breaks the segment in the outer shell,
A casting pipe for ejecting backfill material is provided at the rear.

Therefore, the inner cylinder and the outer shell are advanced by the propulsion jack while the cutter is rotated by the motor, so that the outer periphery of the segment is excavated in a ring shape by the cutter, and the space formed by the forward movement of the apparatus is formed. While the backfill material is ejected from the casting pipe to the portion and backfilled, the existing segment can be broken and removed by the core cutter.

[0005]

When the ground in which the tunnel structure is buried is soft, or when the shield backfilling device is of a muddy water type, the device is dismantled from the peripheral surface of the fuselage of the device. It is necessary to prevent muddy water from entering the inside of the fuselage from the fitting portion with the outer peripheral surface of the tunnel. However, in the above-described conventional shield backfilling device, no seal member or the like is attached to the inner peripheral surface of the inner cylinder, and it is impossible to reliably prevent water from entering the outer shell.

Further, the cutter excavates the outer periphery of the existing tunnel (segment) in an annular shape, but it is difficult to position the cutter (the inner cylinder and the outer shell) concentrically with respect to the existing tunnel. In order to prevent the cutter from being damaged due to contact with the segments, concrete remains on the outer peripheral surface of the existing tunnel even after excavation, and the outer peripheral surface of the existing tunnel becomes uneven. For this reason, if a seal member is attached to the inner peripheral surface of the inner cylinder and always tries to stop the water by closely contacting the outer peripheral surface of the existing tunnel (segment), the seal member slides on the uneven tunnel and breaks. There is a problem.

An object of the present invention is to solve such a problem, and an object of the present invention is to provide a tunnel backfill apparatus which suppresses infiltration into a body during a tunnel backfill operation and improves sealing performance. And

[0008]

According to a first aspect of the present invention, there is provided a tunnel backfilling apparatus for removing and backfilling a cylindrical tunnel structure buried underground. A revolving body having a cylindrical body having a larger diameter than the tunnel structure; a revolving body having a cutter rotatably supported at a front portion of the body and capable of excavating an outer periphery of the tunnel structure; It has a propulsion means for advancing the fuselage by obtaining a propulsion reaction force from the ground or the tunnel structure, and a soft portion provided on the inner peripheral surface side of the fuselage and pressed and adhered to the outer peripheral surface side of the tunnel structure. A pair of front and rear pressurized seal members, seal member moving means for moving one of the pair of pressurized seal members back and forth in the excavation direction, and dismantling means for dismantling the tunnel structure from a working space in the body. With It is characterized in that the.

Further, in the tunnel backfilling device according to the second aspect of the present invention, the pressure type sealing member has a ring shape,
A frame-shaped seal that slides or is fixed to the inner peripheral surface of the body to be able to stop water; a tubular seal held by the frame-shaped seal and expanded by supplying a fluid therein; and an inner periphery of the tubular seal A soft seal fixed to the surface and pressed against the outer peripheral surface of the tunnel structure to stop water.

Further, in the tunnel backfilling device according to the third aspect of the present invention, the pressure-type sealing member has a ring shape,
A frame-shaped seal slidable or fixed to the inner peripheral surface of the body to be able to stop water, a first tubular seal held by the frame-shaped seal and expanded by supplying a fluid therein, and the first tubular seal; It is held by the frame-shaped seal so as to be located on the inner peripheral side of the seal, is softer than the first tubular seal, and supplies fluid to the inside to expand, thereby pressing against the outer peripheral surface side of the tunnel structure. And a second tubular seal capable of stopping water.

Further, in the tunnel backfilling device of the invention according to claim 4, the pressure type sealing member has a ring shape,
A frame-shaped seal that is slidable or fixed to the inner peripheral surface of the body to stop water, and a base end portion is held by the frame-shaped seal to form a tapered shape and press against the outer peripheral surface side of the tunnel structure. And a brush seal capable of stopping water.

Further, in the tunnel backfilling device according to the present invention, the pressurizing seal member expands and adheres to each other by supplying a fluid therein, and presses against the outer peripheral surface side of the tunnel structure. And a plurality of tubular seals capable of stopping water.

Further, in the tunnel backfilling device according to the invention of claim 6, the revolving structure is provided with a coating layer forming means for forming a smooth coating layer on a surface excavated by the cutter.

Further, in the tunnel backfilling device according to the present invention, the cutter has a front cutter, an outer cutter and an inner cutter, and the inner cutter is a water jet device for ejecting abrasive. It is characterized by.

Further, in the tunnel backfilling device according to the invention of claim 8, an excavated object intake port is opened between the body and the pressurized seal member, and the excavated object intake port is located on the revolving body behind the cutter. And a guide means for guiding the excavated object to the excavated object intake port.

According to a ninth aspect of the present invention, there is provided a tunnel backfilling device, which is located on the inner peripheral surface side of the body in front of the pressurizing seal member and is attached to the outer peripheral surface side of the tunnel structure in an emergency. It is characterized by the provision of a backup seal that makes pressure contact.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic cross section of a tunnel backfill apparatus according to a first embodiment of the present invention, FIG. 2 is a front view of the tunnel backfill apparatus, FIG. 3 is a cross section of a first pressurized seal member, FIG.
FIG. 7 to FIG. 7 are schematic cross-sections showing a backfill operation process by the tunnel backfill device.

As shown in FIGS. 1 and 2, the tunnel backfill apparatus of this embodiment dismantles and removes an existing tunnel T as a tunnel structure already buried in the ground, In this embodiment, the existing tunnel T is used.
Is composed of iron segments S connected by bolts, and cement mortar is solidified around the outside of the segments S.

In this tunnel backfilling device, the body 11 is composed of a front body 12, a middle body 13 and a rear body 14 which are slightly larger in diameter than the existing tunnel T and have a cylindrical shape. Although the outer diameter is almost the same as that of the trunk 13,
The rear trunk 14 is slightly smaller. An inner cylinder 15 is mounted inside the front body 12, and a ring-shaped support wall 16 is fixed to the rear. The front body 12 has a cutter as a revolving body having substantially the same outer diameter at the front end. Head 17 is a bearing 18
And a seal member 19 so as to be pivotable.
A plurality of cutter bits (front and inner cutters) 20a and 20b and a disk cutter (outer cutter) 21 are attached to the front end of the cutter head 17, and an external gear ring gear 22 is fixed to the rear end. . On the other hand, a plurality of drive motors 23 are attached to the support wall 16 of the front body 11, and a pair of universal joints 25,
A drive gear 28 is connected via a connecting rod 26 and a connecting rod 27, and each drive gear 28 meshes with the ring gear 22.

Therefore, when each drive motor 23 is driven,
The driving force of the drive shaft 24 is adjusted by the universal joint 25, the connecting rod 27,
The cutter head 17 can be rotated via a ring gear 18 that is transmitted to a drive gear 28 via a universal joint 26 and meshes with the drive gear 28. And then,
A plurality of cutter bits 2 rotating together with the cutter head 17
The outer periphery of the existing tunnel T can be excavated by the disk cutters 0 a and 20 b and the disk cutter 21.

The front end of the middle body 13 is fitted to the inner periphery of the rear end of the front body 12 by a seal member 29 so as to be freely bent.
Between the support wall 16 of the front body 12 and the support wall 30 of the middle body 13, a plurality of center jacks 31 are provided. Therefore, by changing the expansion and contraction strokes of the plurality of center folding jacks 31, the front trunk 12 can be bent with respect to the middle trunk 13 in accordance with the existing direction of the existing tunnel T, and the excavation direction can be corrected.

The rear body 14 has a front end fitted to the inner periphery of the rear end of the middle body 13 and is movable along the excavation direction by fitting a guide pin 32 and a guide cylinder 33. ,
A plurality of propulsion jacks 35 are provided between the support wall 30 of the middle trunk 13 and the support wall 34 of the rear trunk 14. Therefore, by extending the plurality of propulsion jacks 35, the front trunk 12, the middle trunk 13 and the like can be advanced with respect to the rear trunk 14. A plurality of grippers 36 are attached to the rear portion of the rear body 14 at equal intervals in the circumferential direction, and can be pressed against the wall surface of the tunnel whose outer peripheral surface is excavated by supplying hydraulic pressure. Further, a partition 37 is formed at the rear end of the rear trunk 14, and a plurality of backfill material supply devices 38 for filling the space removed from the existing tunnel T are mounted on the partition 37, and the partition 37 is backfilled. A collapse exploration jack 39 for inspecting the filling state of the material is mounted. As the backfill material, a material obtained by appropriately blending a solidifying material with sand is preferable.

A guide beam 40 is provided in the center of the body 11 along the direction of excavation, and the rear end is connected to the support wall 34 of the rear body 14. The front end of the guide beam 40 extends to the inside of the existing tunnel T ahead of the cutter head 17, a reaction force receiving ring 41 is fitted on the outer periphery, and a towing jack 42 is installed between the two. Have been. The reaction force receiving ring 41 has a plurality of arms 43 extending in a radial direction, and a gripper 44 attached to a tip portion of the ring 43 is gripped by a gripper jack 45 to an existing tunnel T.
It can be freely pressed against the inner wall surface. In front of the reaction receiving ring 41, a reaction receiving member (not shown) is firmly fixed to the existing segment S constituting the existing tunnel T, and the reaction receiving ring 41 is attached to the reaction receiving rod 46.
Is connected to this reaction force receiving member.

A movable ring 47 is movably mounted in the middle of the guide beam 40 along the direction of excavation, and can be moved by a movable jack 48. And
A swivel ring 49 is pivotally supported by the moving ring 47 and can be swiveled by a swivel motor 50.
A segment removing device 51 is mounted on the revolving ring 49. The segment removing device 51 has a bolt loosening device (not shown) that loosens a bolt that connects the existing segments S. When the segment S is displaced in the radial direction to grip the disassembled segment S and is placed at a predetermined position, A hoist (not shown) carries the segment S out of the existing tunnel T.

Further, a sludge pipe 52 and a sludge pipe 53 are disposed in the guide beam 40, and one end of the sludge pipe 52 is bent upward, and one end of the sludge pipe 53 is bent downward. , Respectively, and extend forward through the inner peripheral side of the front body 11, open behind the cutter head 17 and on the outer peripheral side of the ring gear 22, and connect the other end to the existing tunnel T.
It extends to the front inside and is connected to external excavated soil treatment equipment. A plurality of retraction preventing jacks 54 are mounted on the support wall 16 of the front trunk 12 at equal intervals in the circumferential direction, and can be pressed against the segment S at the end of the existing tunnel T.

By the way, in the tunnel backfilling device of the present embodiment, the tunnel T buried in the soft ground can be removed and excavation is performed while supplying muddy water.
It is necessary to reliably prevent muddy water from entering the body 11 during work. Therefore, the existing tunnel T
A seal device 61 for stopping the water at the fitting portion is provided. As shown in FIG.
A first pressurizing seal member 62 supported on the inner peripheral surface of the first inner cylinder 15 so as to be movable back and forth in the excavation direction; a second pressurizing seal member 63 fixed to the inner peripheral surface of the inner cylinder 15; The third and fourth seal members 64 and 65 are fixed to the inner peripheral surface of the cylinder 15.

As shown in FIGS. 1 and 3 (a), the first pressure-type seal member 62 has a ring shape and is capable of sliding along the inner peripheral surface of the inner cylinder 15 along the digging direction. A slide-type seal case (frame-shaped seal) 67 having a pair of seal members 66, a rubber-made tube supported by the inner peripheral side concave portion 68 of the slide-type seal case 67, and a fluid (for example, oil, A hollow seal (tubular seal) 69 which can be expanded and contracted by supplying and discharging water and the like. The hollow seal 69 is fixed to the inner peripheral surface of the hollow seal 69, and is formed of a softer material than the hollow seal 69. Soft seal 70
It is composed of The hollow seal 69 is connected to a supply / discharge pipe 71 for supplying and discharging a fluid. The first pressure-type sealing member 62 is provided inside the inner cylinder 15.
, A plurality of seal slide jacks (seal member moving means) 72 are disposed at equal intervals in the circumferential direction, and the main body is connected to the support wall 16 via the bracket 73, and the distal end of the drive rod 74. The part is connected to the seal case 67 of the first pressurized seal member 62.

Accordingly, when hydraulic pressure is supplied into the hollow seal 69 of the first pressurized seal member 62 through the supply / discharge pipe 71 by a hydraulic supply / discharge device (not shown), as shown in FIG.
The hollow seal 69 expands, and due to the expansion force, the soft seal 70 presses and adheres to the uneven portion of the concrete mortar M on the outer peripheral surface of the existing tunnel T to stop water, and the sealing material 66 of the slide-type seal case 67 is closed. Water can be stopped by pressing and contacting the inner peripheral surface of the inner cylinder 15. On the other hand, when the hydraulic pressure is discharged from the inside of the hollow seal 69, the hollow seal 6
9 is contracted, and the soft seal 70 is separated from the outer peripheral surface of the existing tunnel T. By extending the seal slide jack 72 in this state, the slide seal case 67, the hollow seal 69, and the soft seal 70 are moved forward. You can move.

The second pressurizing seal member 63 has substantially the same structure as the first pressurizing seal member 62, and is formed in a ring shape and fixed to the inner peripheral surface of the inner cylinder 15 as shown in FIG. Fixed seal case (frame-shaped seal) 75 and a rubber-made tubular seal (tubular seal) 76 supported by the fixed seal case 75 and capable of expanding and contracting.
And a soft seal (not shown) fixed to the inner peripheral surface of the hollow seal 76. The hollow seal 76 is connected to a supply / discharge pipe (not shown) for supplying / discharging the fluid.

Further, the third and fourth seal members 64, 64 have a tongue shape in which the base ends are fixed to the inner cylinder 15 and the ends extend rearward, and are constantly pressed against the outer peripheral surface of the existing tunnel T. And stop the water.

Therefore, the hollow seal 7 of the second pressure-type seal member 63 is passed through a supply / discharge pipe by a hydraulic supply / discharge device (not shown).
When a hydraulic pressure is supplied to the inside 6, the hollow seal 76 expands, and the expansion force causes the soft seal to press and contact the uneven portion of the concrete mortar M on the outer peripheral surface of the existing tunnel T to stop water. On the other hand, when the hydraulic pressure is discharged from the inside of the hollow seal 76, the hollow seal 76 contracts, and the soft seal is separated from the outer peripheral surface of the existing tunnel T. By extending the propulsion jack 35 in this state, the soft The sliding seal case 75, the hollow seal 76, and the soft seal can be moved forward. In addition, the third and fourth seal members 64, 64 are constantly pressed against the outer peripheral surface of the existing tunnel T to stop water, and can move forward together with the front trunk 12 in this pressed state.

Here, a description will be given of an operation of disassembling and removing the existing tunnel T and refilling the existing tunnel T by the above-described tunnel backfill apparatus of the present embodiment.

As shown in FIG. 3B and FIG.
, That is, the front trunk 11 and the cutter head 17 are fitted to the outer peripheral end of the existing tunnel T buried in the ground, and the plurality of grippers 36 are pressed against the inner wall surface of the excavation tunnel to press the trunk 11. Also, the reaction force receiving ring 41 is fixed by pressing the gripper 44 against the inner wall surface of the existing tunnel T by the gripper jack 45, and the guide beam 40 is fixed.
The rear trunk 14 can receive the excavation reaction force through the above. Further, in the sealing device 61, each seal slide jack 72 is extended so that the first pressurized seal member 62
Is moved forward, hydraulic pressure is supplied into the hollow seal 69 to expand it, and the soft seal 70 is brought into close contact with the outer peripheral surface (concrete mortar M) of the existing tunnel T, and each seal of the sliding seal case 67 is Water is stopped by bringing the member 66 into close contact with the inner peripheral surface of the inner cylinder 15. On the other hand, the hydraulic pressure is discharged from the hollow seal 76 of the second pressurized seal member 63 and contracted, and the soft seal is separated from the outer peripheral surface of the existing tunnel T.

In this state, while driving the drive motor 23 to rotate the cutter head 17 via the ring gear 18, the plurality of propulsion jacks 35 are extended to obtain a reaction force from the rear trunk 14, thereby obtaining the reaction force shown in FIG. As shown in, while the front body 12 and the middle body 13 are moved forward, water is fed forward from the mud pipe 52,
A plurality of cutter bits 20 mounted on the cutter head 17
a, 20b and the disk cutter 21 excavate the outer periphery of the existing tunnel T, and discharge the excavated earth and sand from the exhaust pipe 53.
The front trunk 12 and the middle trunk 1 due to the extension of the propulsion jack 35
At the time of the forward movement of 3, the front trunk 12 is bent and the excavation direction is corrected by changing the expansion / contraction stroke of each of the center folding jacks 31 in accordance with the existing direction of the existing tunnel T.

Then, as shown in FIG. 3 (b), when the front body 12 is advanced by excavation, the first pressurizing seal member 62
Is in contact with the outer peripheral surface of the existing tunnel T and the inner peripheral surface of the inner cylinder 15 to stop water. That is, when the front trunk 11 advances,
By contracting the seal slide jack 72 by the same amount as the extension amount of the propulsion jack 35, the soft seal 70 is prevented from moving with respect to the existing tunnel T, and the close contact between them is maintained. Each of the sealing members 66 and the inner peripheral surface of the inner cylinder 15 relatively slide in a close contact state. Therefore, the soft seal 70 is deformed to the rough outer surface of the excavated existing tunnel T in conformity with its unevenness and closely adheres without any gap, and since there is no relative movement, the water can be reliably stopped and the hollow seal is formed. 69 is prevented from being damaged. In addition, since each seal member 66 moves relative to the inner peripheral surface of the machined inner cylinder 15 having no irregularities in a state of being in close contact, water can be reliably stopped and breakage is prevented. On the other hand, the second pressurized seal member 63 is
Is separated from the outer peripheral surface of the existing tunnel T, so that it does not slide on the rough outer surface of the existing tunnel T when the front trunk 11 advances, and damage to the hollow seal 76 and the soft seal is prevented.

With the excavation work, in the working space inside the fuselage 11, the segment removing device 51 moves to loosen the connecting bolt of the existing segment S to disassemble it, and the hoist operates to disassemble and unload the segment S. are doing.

Thereafter, when the propulsion jack 35 extends a predetermined stroke and excavates the outer periphery of the existing tunnel T by a predetermined distance, the forward movement of the front trunk 12 and the middle trunk 13 is stopped. In this state, as shown in FIG. 6, hydraulic pressure is supplied into the hollow member 76 of the second seal member 63 to expand the hollow member 76, and the soft seal is brought into close contact with the outer peripheral surface of the existing tunnel T to stop water. on the other hand,
The first pressurizing seal member 62 discharges the hydraulic pressure from the inside of the hollow seal 69 and contracts it, thereby separating the soft seal 70 from the outer peripheral surface of the existing tunnel T. Then, the retraction preventing jack 54 is extended to extend the segment S at the end of the existing tunnel T.
Of the excavation tunnel and the pressure contact of the inner wall surface of the excavation tunnel by the plurality of grippers 36 is released.
5 is contracted, and the rear trunk 14 advances and approaches the front trunk 12 and the middle trunk 13. At this time, the towing jack 42 extends in synchronization with the propulsion jack 35 and the reaction force receiving ring 41
By pulling the rear trunk 14 forward through the guide beam 40, the front trunk 12 and the middle trunk 13 are prevented from retreating.

Then, as shown in FIG. 7, when the rear trunk 14 advances to a predetermined position with respect to the front trunk 12 and the middle trunk 13, the seal slide jack 72 is extended and the first pressurizing seal member 62 is moved forward. Move. At this time, since the soft seal 70 moves away from the existing tunnel T via the contracted hollow seal 69, the soft seal 70 does not slide on the rough outer surface of the existing tunnel T. The breakage of the seal 70 is prevented. On the other hand, since the front body 11 is stopped, the soft seal of the second pressure-type seal member 63 is deformed in accordance with the unevenness and closely adheres without any gap, and there is no relative movement, so that the sealing performance is improved. Water can be stopped and breakage is prevented.

At this time, when the rear body 14 approaches the middle body 13, a plurality of backfill material supply devices 38 discharge the backfill material into a space formed behind the rear body 14. Then, the space portion is back-filled.

When the body 11 moves a predetermined distance in this way, the existing tunnel T is removed by a predetermined distance,
A predetermined distance tunnel can be backfilled. Thereafter, in the same manner as described above, the space between the front trunk 12 and the existing tunnel T is sealed by the first
The existing tunnel T is dismantled while excavating the ground by the cutter head 17 by moving the inner trunk 13 forward. By repeating this, all the existing tunnels T are removed and the tunnels are backfilled.

When the front barrel 12 and the middle barrel 13 advance to some extent and approach the reaction force receiving ring 41, the gripper 36
While the rear trunk 14 is held at the inner wall surface of the excavation tunnel, the torsion jack 42 is extended in a state where the gripping of the reaction force receiving ring 41 by the gripper 44 is released. The operation may be performed by moving the ring 41 forward.

As described above, in the tunnel backfilling device of the present embodiment, the body 11 is constituted by the front body 12, the middle body 13, and the rear body 14, and the sealing device is provided between the front body 11 and the existing tunnel T. In the state sealed by 61, the front trunk 12 and the middle trunk 13 are advanced by the extension of the propulsion jack 35 to excavate the outer periphery of the existing tunnel T by the cutter head 17, and at the same time, the existing tunnel T Is disassembled, the rear trunk 14 is advanced by contraction of the propulsion jack 35, and the back space is filled with a backfill material to refill the tunnel.

The sealing device 61 comprises a first pressure-type sealing member 62, a second pressure-type sealing member 63, and third and fourth sealing members 64 and 65. Can be moved by the seal slide jack 72, so that the pressurized seal members 62 and 63 are selectively used when the front body 12 and the middle body 13 are advanced and when the rear body 14 is advanced, so that the sealing property and the durability are improved. Performance can be improved. In addition, the first and second pressurized seal members 62, 63
With the sliding seal cases 67 and 75 and the hollow seal 6
9, the soft seal 70 is deformed by being pressed against the concrete mortar M on the outer peripheral surface of the existing tunnel T which has been excavated by the cutter head 17 and has an uneven shape. By tightly contacting with no gap, the sealing performance is improved and water can be stopped.

In the above-described embodiment, the pressurizing seal devices 62 and 63 are constituted by the sliding seal case 67, the hollow seal 69 and the soft seal 70, but the present invention is not limited to this structure. FIG. 8 is a cross-sectional view of a principal part showing a first pressurized sealing member in a tunnel backfilling device according to a second embodiment of the present invention. FIG. 9 is a first pressurizing type seal in a tunnel backfilling device according to a third embodiment of the present invention. FIG. 10A is a cross-sectional view of a main part showing a seal member, showing a first example of a tunnel backfilling device according to a fourth embodiment of the present invention.
FIG. 10B schematically shows a cross section of a pressure-type sealing member. Note that members having the same functions as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted.

In the second embodiment, as shown in FIG. 8, a first pressurizing seal member 81 is formed in a ring shape and is capable of slidingly contacting the inner peripheral surface of the inner cylinder 15 along the digging direction. A slide-type seal case (frame-shaped seal) 83 having a member 82 and a rubber-made tube supported by an inner peripheral side concave portion 84 of the slide-type seal case 83 and for supplying and discharging a fluid such as oil to the inside. First expandable and contractible with
A hollow seal (first tubular seal) 85 is supported by a slide-type seal case 83 so as to be located on the inner peripheral surface side of the first hollow seal 85, and is formed of a softer material than the first hollow seal 85 and has an internal structure. A second hollow seal (second tubular seal) 86 that can be expanded and contracted by supplying and discharging a fluid such as oil, a first hollow seal 85 and a second hollow seal 86
And an elastic rubber (elastomer) 87 having a ring shape interposed therebetween. A fluid supply / discharge pipe (not shown) is connected to each of the hollow seals 85 and 86, and a seal slide jack 7 is attached to the seal case 83.
The distal ends of the two drive rods 74 are connected.

Therefore, as shown in FIG. 8 (a), when hydraulic pressure is supplied into the first and second hollow seals 85 and 86 of the first pressurizing seal member 81, the second hollow seal 86 becomes the first hollow seal. It expands greatly because it is softer than 85.
The hollow seal 86 is deformed in accordance with the uneven portion of the concrete mortar M on the outer peripheral surface of the existing tunnel T, and tightly closes water without any gap, and slides the seal case 83.
The seal member 82 can press and adhere to the inner peripheral surface of the inner cylinder 15 to stop water. On the other hand, when the hydraulic pressure is discharged from the inside of each of the hollow seals 85 and 86, the hydraulic seal is contracted, and the second hollow seal 86 is separated from the outer peripheral surface of the existing tunnel T. In this state, by extending the seal slide jack 72, the first hollow seal 86 is expanded.
The pressurized seal member 81 can be moved back and forth.
Then, the body 11 is displaced in the radial direction with respect to the existing tunnel T, and as shown in FIG.
The first hollow seal 85 further expands even if the distance between the first hollow seal 85 and the second hollow seal 86 increases, so that the second hollow seal 86 can be tightly fitted to the uneven portion of the concrete mortar M without any gap to stop water.

In the third embodiment, as shown in FIG. 9, the first pressure-type sealing member 91 is a ring-shaped seal that can slide along the inner peripheral surface of the inner cylinder 15 along the digging direction. Slide-type seal case (frame-shaped seal) 93 having a member 92, and a first part of the slide-type seal case 93
A hollow seal (tubular seal) 95 supported by the concave portion 94 and made of rubber and formed of a rubber and capable of expanding and contracting by supplying and discharging a fluid such as oil therein, and a base end of the slide-type seal case 93. And a soft wire brush seal 97 held in the two concave portions 96 and having a tapered shape. A fluid supply / discharge pipe (not shown) is connected to the hollow seal 95, a grease supply pipe (not shown) is connected to the wire brush seal 97, and a distal end portion of the drive rod 74 of the seal slide jack 72 is connected to the seal case 93. Are connected.

Therefore, when hydraulic pressure is supplied into the hollow seal 95 of the first pressurizing seal member 91, this hollow seal 95
Expands and adheres to the irregularities of the concrete mortar M on the outer peripheral surface of the existing tunnel T to stop water, and the tip of the wire brush seal 97 presses and adheres to the irregularities of the concrete mortar M without gaps to stop water. Can be improved. On the other hand, when the hydraulic pressure is discharged from the inside of the hollow seal 95, it contracts and separates from the outer peripheral surface of the existing tunnel T. In this state, by extending the seal slide jack 72, the first pressure-type seal member 91 is moved back and forth. In this case, since the tip of the wire brush seal 97 is pressed against the uneven portion of the concrete mortar M, an auxiliary sealing effect can be exhibited.

In the fourth embodiment, as shown in FIGS. 10 (a) and 10 (b), the first pressurizing seal member 101 has a ring shape and can be sealed by sliding on the inner peripheral surface of the inner cylinder 15. The sliding seal case (frame-shaped seal) 102 is supported by two rows of recesses 103 and 104 of the sliding seal case 102, and is made of rubber to form a tube, and is expanded by supplying and discharging a fluid such as oil inside. And four shrinkable hollow seals (tubular seals) 105, 106, 107, and 108, and a soft seal (not shown) 86 formed of a softer material than the hollow seals 105 to 108. The hollow seals 105 to 108 are alternately supported by the concave portions 103 and 104, and the side portions are in close contact with each other through the cutout portion 109.

Accordingly, when hydraulic pressure is supplied to the hollow seals 105 to 108 of the first pressure-type seal member 101,
105-108 expands, the sides thereof come into close contact with each other, and each soft seal is deformed and adheres to the concrete mortar M on the outer peripheral surface of the existing tunnel T without gaps, so that water can be reliably stopped. When any one of the hollow seals 105 to 108 is damaged due to long-term use or the like, only the damaged seal needs to be replaced, and the replacement operation can be easily performed in a short time.

In the second to fourth embodiments described above,
Although the modified example of the first pressurized seal member has been described, it may be applied to the second pressurized seal member.

In a modification of the embodiment described above,
Although the present invention mainly relates to a sealing device, it is possible to improve the sealing performance by installing another device. Figure 1
1 is a front end section of a tunnel backfill apparatus according to a fifth embodiment of the present invention, FIG. 12 is a front end section of a tunnel backfill apparatus according to a sixth embodiment of the present invention, and FIG. 13 is a seventh embodiment of the present invention. Front end section of the tunnel backfilling device according to the embodiment,
FIG. 14 is a front end section of the tunnel backfill apparatus according to the eighth embodiment of the present invention, FIG. 15 is a front end section of the tunnel backfill apparatus according to the ninth embodiment of the present invention, and FIG. 2 shows a front end section of the tunnel backfill device according to the embodiment.

In the fifth embodiment, as shown in FIG. 11, an inner cylinder 15 is mounted inside the front body 12 and
A cutter head 17 is pivotally mounted on the front end. A ring gear 22 is provided at the rear end of the cutter head 17.
Is fixed, while a drive motor 23 is attached to the front body 11 side, and a drive gear 28 is meshed with the ring gear 22. In addition, an existing tunnel T
A first pressurizing seal member 62 slidable before and after the water is stopped at the fitting portion with the second pressurizing member, and a second pressurizing seal member 63 fixed to the inner cylinder 15 are provided. A ring-shaped mounting bracket is provided on the inner peripheral surface of the rear end of the cutter head 17.
Solidifying agent injection nozzle 1 as means for forming a coating layer via 111
A plurality of solidifying agent supply pipes 113 are connected to each of the solidifying agent injection nozzles 112.

Therefore, when the front barrel 12 is advanced while driving the drive motor 23 to rotate the cutter head 17, the plurality of cutter bits 20 mounted on the cutter head 17 are moved.
a, 20b and the disk cutter 21 excavate the outer periphery of the existing tunnel T. Then, the outer peripheral surface of the existing tunnel T becomes an uneven surface of the concrete mortar M, and the solidifying agent is injected from each of the solidifying agent injection nozzles 112 to the uneven surface to form a smooth solidifying agent layer (coating). Layer) F1 is formed, and the sealing members 62 and 63 are brought into close contact with the solidifying agent layer F1 to form the sealing members 62 and 63.
It is possible to improve the water blocking property by increasing the sealing performance between the first and second segments S.

In the sixth embodiment, as shown in FIG. 12, a resin film sticking device 116 as a coating layer forming means is mounted on the inner peripheral surface of the rear end of the cutter head 17 via a ring-shaped mounting bracket 115. A resin film supply device (not shown) is connected to the resin film sticking device 116. Accordingly, as the cutter head 17 excavates the outer peripheral portion of the existing tunnel T, the resin film sticking device 116 sticks the resin film to the uneven surface of the concrete mortar M, so that the resin agent layer (coating layer) has a smooth surface. ) F2 is formed, and the respective sealing members 62 and 63 can be securely stopped by contacting the resin layer F2.

In the seventh embodiment, as shown in FIG. 13, a cutter head 17 is rotatably mounted at the front end of the front body 12, and a ring gear 22 is provided at the rear end of the cutter head 17. While being fixed, a drive motor 23 is attached to the front body 11 side, and a drive gear 28 meshes with the ring gear 22. And this cutter head 1
7, a plurality of cutter bits 20a are provided on the front surface.
However, a disk cutter 21 is mounted on the outer peripheral surface, and a water jet device (inner peripheral cutter) 12 is mounted on the inner peripheral portion.
1 is installed. This water jet device 121
The concrete mortar M around the outside of the existing tunnel T is excavated by ejecting water containing the abrasive from a plurality of tip nozzles 122 arranged in the circumferential direction, and the supply and discharge pipes 123 are connected. I have. In addition, a first pressurizing seal member 62 slidable on the inner peripheral surface of the front trunk 12 before and after stopping the fitting portion with the existing tunnel T, and a second pressurizing seal member fixed to the inner cylinder 15. 63 are provided.

Accordingly, when the front barrel 12 is advanced while driving the drive motor 23 to rotate the cutter head 17, the plurality of cutter bits 20 mounted on the cutter head 17 are moved.
a) The disc cutter 21 excavates the concrete mortar M around the existing tunnel T, and the concrete mortar M can be excavated smoothly by the abrasive sprayed with water from the tip nozzle 122 of the water jet device 121. Therefore, the outer peripheral surface of the existing tunnel T is smooth without irregularities, and the sealing members 62, 63 are in close contact with the excavated surface, so that the sealing members 62, 63
The sealing performance between the segment 63 and the segment S can be enhanced to improve the water stoppage, and the seal members 62 and 63 can be prevented from being damaged.

In the eighth embodiment, as shown in FIG. 14, at the front end of the cutter head 17, a plurality of cutter bits 20a are mounted on the front surface, and a disk cutter 21 is mounted on the outer peripheral surface. A ring-shaped peeling cutter (inner circumferential cutter) 132 along the circumferential direction is mounted via a bracket 131. The peeling cutter 132 has a triangular cross section in which the inner peripheral surface forms a flat surface substantially parallel to the outer peripheral surface of the segment S, and has a protruding portion 132a protruding from the outer peripheral portion. In addition, a ring-shaped discharge guide 134 having a ring shape extending in the circumferential direction is mounted via a bracket 133 at the front end of the ring gear 22 fixed to the cutter head 17.
The discharge guide 134 has a triangular cross section in which the inner peripheral surface forms a flat surface substantially parallel to the outer peripheral surface of the segment S.

Therefore, when the front body 12 is advanced while rotating the cutter head 17, the plurality of cutter bits 20a, the disk cutters 21, and the release cutters 132 mounted on the cutter head 17 are moved to the concrete mortar M on the outer periphery of the existing tunnel T. In this case, the concrete mortar M around the outside of the existing tunnel T is smoothly excavated by the peeling cutter 132. The earth and sand generated by the excavation of the cutter head 17 flows backward, but the excavated earth and sand is guided to the inlet of the mud pipe 53 by the earth discharging guide 134, and the flow to the sealing members 62 and 63 is suppressed. it can. Therefore, the sealing members 62 and 63 are brought into close contact with the excavated surface of the concrete mortar M, so that the sealing performance between the sealing members 62 and 63 and the segment S can be enhanced and the water stopping performance can be improved. 6
2, 63 can be prevented from being damaged.

In the ninth embodiment, as shown in FIG. 15, the cutter head 17 has a plurality of cutter bits 20a and 20b and a disk cutter 21 attached to the front end thereof, and a bracket 141 attached to the front end of the ring gear 22. , A plurality of water jet nozzles 142 are mounted along the circumferential direction. The water jet nozzle 142 jets water (or air) from the tip toward the excavation surface of the concrete mortar M.

Accordingly, when the front body 12 is advanced while rotating the cutter head 17, the cutter bits 20a and 20b and the disk cutter 21 excavate the concrete mortar M around the existing tunnel T, and the generated sediment flows backward. However, the excavated earth and sand is guided to the inlet to the mud pipe 53 by the water injected from the water injection nozzle 142, and the flow to the seal members 62 and 63 can be suppressed. Therefore, the sealing members 62 and 63 come into close contact with the excavated surface of the concrete mortar M, and the sealing members 62 and 63 are closed.
The sealing performance between the third member 3 and the segment S can be enhanced to improve the water stoppage, and the seal members 62 and 63 can be prevented from being damaged.

In the tenth embodiment, as shown in FIG. 16, an inner cylinder 15 is mounted inside the front body 12, and a cutter head 17 is mounted rotatably at the front end. On the inner peripheral surface of the inner cylinder 15, a first pressurizing seal member 62 slidable before and after stopping the water at a fitting portion with the existing tunnel T, and a second pressurizing seal member 63 fixed to the inner cylinder 15. Are provided. Each pressurized seal member 6
The fluids 2 and 63 are expanded by supplying a fluid into the hollow seals 68 and 76, and can press and adhere to the concave and convex portions of the concrete mortar M on the outer peripheral surface of the existing tunnel T to stop water. At the front end of the inner cylinder 15, a backup seal 151 for stopping water at a fitting portion with the existing tunnel T is provided. The backup seal 151 is a ring-shaped fixed seal case (frame-shaped seal) 152 fixed to the inner cylinder 15, and a rubber-made tubular member held in the fixed seal case 152 to expand and contract. And a hollow seal (tubular seal) 153.
A supply / discharge pipe (not shown) for supplying / discharging the fluid is connected to 53.

Accordingly, when the front body 12 is advanced while rotating the cutter head 17, the cutter bits 20 a and 20 b and the disk cutter 21 excavate the concrete mortar M around the outside of the existing tunnel T, while the sealing members 62 and
63 is able to reliably stop water by making close contact with the excavated surface of the concrete mortar M. Then, the hollow seals 68, 63 of the sealing members 62, 63 can be used for a long time.
In the case where the tunnel 76 is damaged, the operation of the tunnel backfilling device is stopped, the fluid is expanded by supplying the fluid into the hollow seal 153 of the backup seal 151, and the existing tunnel T
Water tightly on the concrete mortar M on the outer peripheral surface. In this water-stopped state, the fluid is discharged from the inside of the hollow seals 68, 76 of the pressurized seal members 62, 63 to be contracted, separated from the outer peripheral surface of the existing tunnel T, and the damaged hollow seals 68, 76 are replaced. be able to.

In the above-described embodiment, the removal operation of the existing tunnel T is performed by loosening the fastening bolts of the segment S and disassembling the existing segment S. However, for example, the work is cut using a disk-shaped cutter or the like. May be dismantled.

[0066]

As described above in detail in the embodiment, according to the tunnel backfilling device of the first aspect of the present invention, the tunnel structure is provided at the front of the cylindrical body having a larger diameter than the tunnel structure. A revolving structure having a cutter capable of excavating the outer periphery is rotatably supported, and a propulsion means is used to obtain a propulsion reaction force from the surrounding ground or a tunnel structure so that the revolving structure can be advanced. A pair of front and rear pressurizing seal members having a soft portion that presses and adheres to the outer peripheral surface side of the body is provided, and one of the pressurizing seal members can be moved back and forth by the seal member moving means in the excavation direction. Since the dismantling means for disassembling the structure is provided, when excavating the cutter by advancing the fuselage, water is stopped between the inner peripheral surface of the fuselage and the outer peripheral surface of the tunnel structure by one of the pressurized seal members. On the other hand, when the pressurized seal member advances, water is stopped between the inner peripheral surface of the body and the outer peripheral surface of the tunnel structure by the other pressurized seal member. The sealing member and the segment can be improved in terms of water infiltration into the body at the time of tunnel backfilling work by improving tightness between the sealing member and the segment, and prevent breakage of the sealing member. be able to.

According to the second aspect of the present invention, the pressure-type sealing member is formed in a ring shape, and the frame-shaped seal is slidably or fixed to the inner peripheral surface of the body so that the water can be stopped. Consisting of a tubular seal that is held by the seal and expands by supplying fluid to the inside, and a soft seal that is fixed to the inner peripheral surface of the tubular seal and presses against the outer peripheral surface of the tunnel structure to stop water As a result, the soft seal closely adheres to the rough uneven surface of the existing tunnel after the excavation without any gap, so that the sealing performance between the seal member and the segment can be enhanced and the water stopping performance can be improved.

According to the third aspect of the present invention, the pressure-type sealing member is formed in a ring shape, and the frame-shaped seal is slidably or fixed to the inner peripheral surface of the body so as to be able to stop water. A first tubular seal that is held by the seal and expands by supplying a fluid therein, and a first tubular seal that is held by the frame-shaped seal so as to be located on the inner peripheral side of the first tubular seal and is softer than the first tubular seal. Since it is composed of a second tubular seal that can press the outer surface of the tunnel structure to stop water by supplying fluid to the inside and expanding, the distance between the body and the tunnel structure changes with the work Even so, the amount of expansion of each tubular seal changes, and the soft seal comes into close contact with the rough uneven surface of the existing tunnel without any gap, and it is possible to improve the sealing performance between the seal member and the segment and improve the water stoppage. it can.

According to the fourth aspect of the present invention, the pressurizing seal member is formed in a ring shape, and a frame-shaped seal slidably or fixed to the inner peripheral surface of the body to stop water, and a base end portion. Is held by the frame-shaped seal and is formed into a tapered shape and a brush seal that can be pressed against the outer peripheral surface side of the tunnel structure to stop water, so that the brush is applied to the rough uneven surface of the existing tunnel after excavation. The seal is always in close contact with no gap, and the sealing performance between the seal member and the segment can be improved without considering the breakage of the brush seal, thereby improving the water stopping performance.

According to the backfilling device of the fifth aspect of the present invention, the pressurized sealing members are expanded and adhered to each other by supplying a fluid therein, and are pressed against the outer peripheral surface side of the tunnel structure to stop. Since a plurality of tubular seals capable of water are used, if any of the tubular seals is damaged due to long-term use or the like, only the damaged seal may be replaced, and the replacement operation can be easily performed in a short time.

According to the tunnel backfilling device of the sixth aspect of the present invention, since the revolving structure is provided with the coating layer forming means for forming a smooth coating layer on the surface excavated by the cutter, the sealing member has a smooth surface. By being in close contact with the coating layer, the sealing property between the seal member and the segments can be enhanced, and the water stopping property can be improved.

According to the tunnel backfilling device of the present invention, the cutter is constituted by the front cutter, the outer cutter and the inner cutter, and the inner cutter is a water jet device for ejecting the abrasive. The jet device excavates the outer periphery of the existing tunnel smoothly without unevenness, and the sealing member adheres tightly to the excavation surface without gaps, improving the sealing performance between the sealing member and the segment without considering breakage and improving water stoppage can do.

According to the tunnel backfilling device of the present invention, an excavated object intake port is opened between the body and the pressurized seal member, and the excavated object is located on the revolving body behind the cutter. Guide means is provided to guide the excavated material to the excavated material intake, so that the earth and sand generated by the excavation of the cutter flows backward, but the guide means guides the excavated material to the excavated material intake and suppresses the flow to the seal member side. Thus, breakage of the seal member can be prevented.

According to the tunnel backfilling device of the ninth aspect of the present invention, the tunnel backfilling device is located on the inner peripheral surface side of the body ahead of the pressurizing seal member and is pressurized and adhered to the outer peripheral surface side of the tunnel structure in an emergency. Since the backup seal is provided, even if the seal member is damaged, the backup seal can more reliably stop water, and the damaged seal member can be reliably repaired and replaced in this state.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a tunnel backfill apparatus according to a first embodiment of the present invention.

FIG. 2 is a front view of the tunnel backfill apparatus.

FIG. 3 is a sectional view of a first pressure-type sealing member.

FIG. 4 is a schematic cross-sectional view illustrating a backfilling operation process by the tunnel backfilling device.

FIG. 5 is a schematic cross-sectional view illustrating a backfill operation process by the tunnel backfill device.

FIG. 6 is a schematic cross-sectional view illustrating a backfill operation process by the tunnel backfill device.

FIG. 7 is a schematic cross-sectional view illustrating a backfill operation process by the tunnel backfill device.

FIG. 8 is a cross-sectional view illustrating a main part of a first pressure-type sealing member in a tunnel backfill device according to a second embodiment of the present invention.

FIG. 9 is a cross-sectional view illustrating a main part of a first pressurizing seal member in a tunnel backfill device according to a third embodiment of the present invention.

FIG. 10 is a schematic diagram illustrating a first pressure-type sealing member in a tunnel backfill apparatus according to a fourth embodiment of the present invention.

FIG. 11 is a front end sectional view of a tunnel backfill apparatus according to a fifth embodiment of the present invention.

FIG. 12 is a front end sectional view of a tunnel backfill device according to a sixth embodiment of the present invention.

FIG. 13 is a front end sectional view of a tunnel backfill device according to a seventh embodiment of the present invention.

FIG. 14 is a front end sectional view of a tunnel backfill device according to an eighth embodiment of the present invention.

FIG. 15 is a front end sectional view of a tunnel backfill device according to a ninth embodiment of the present invention.

FIG. 16 is a front end sectional view of a tunnel backfill apparatus according to a tenth embodiment of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 11 body 12 front body 13 middle body 14 rear body 17 cutter head (slewing body) 23 drive motor 35 propulsion jack 38 backfill material supply device 51 segment removal device (dismantling means) 61 sealing device 62, 81, 91, 101 first Pressure-type seal member 63 Second pressure-type seal member 67, 75, 83, 93, 102 Seal case (frame-shaped seal) 69, 76, 85, 86, 95, 105, 106, 107, 108,
109 hollow seal (tubular seal) 70 soft seal 72 seal slide jack (seal member moving means) 97 wire brush seal 112 solidifying agent injection nozzle 116 resin film sticking device 121 water jet device 132 peeling cutter 134 discharge guide (guide means) 142 Water injection nozzle 151 Backup seal T Existing tunnel (tunnel structure) S segment F1 Solidifying agent layer F2 Resin film layer

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor: Akio Nagao 2-1-1, Shinhama, Araimachi, Takasago-shi, Hyogo F-term in Takasago Research Laboratory, Mitsubishi Heavy Industries, Ltd. 2D054 AA06 AC02 BA05 2D055 AA04 BB01 GB13 LA16

Claims (9)

[Claims] An apparatus for removing and refilling a cylindrical tunnel structure buried in the ground, comprising: a body having a cylindrical shape larger in diameter than the tunnel structure; and a front part of the body. A revolving body having a cutter rotatably supported and capable of excavating the outer periphery of the tunnel structure, a propulsion unit for advancing the body by obtaining a propulsion reaction force from the surrounding ground or the tunnel structure, and the body A pair of front and rear pressurized seal members having a soft portion provided on the inner peripheral surface side and pressure-adhering to the outer peripheral surface side of the tunnel structure; And a disassembling means for dismantling the tunnel structure from a work space in the body. 2. The tunnel backfilling device according to claim 1, wherein the pressure-type sealing member has a ring shape, and is slidably or fixed to an inner peripheral surface of the body so as to be able to stop water. A tubular seal which is held by a frame-shaped seal and expands by supplying a fluid therein, and a soft seal which is fixed to an inner peripheral surface of the tubular seal and presses against an outer peripheral surface of the tunnel structure to stop water. And a tunnel backfilling device. 3. The tunnel backfilling device according to claim 1, wherein the pressure-type sealing member has a ring shape, and is a frame-shaped seal which is slidably or fixed to an inner peripheral surface of the body to be able to stop water. A first tubular seal held by the frame-shaped seal and expanded by supplying a fluid therein, and the first tubular seal held by the frame-shaped seal so as to be located on the inner peripheral side of the first tubular seal A tunnel backfill apparatus, comprising: a second tubular seal that is softer and that is capable of stopping water by pressing against an outer peripheral surface side of the tunnel structure by supplying a fluid to the inside and expanding. 4. The tunnel backfilling device according to claim 1, wherein the pressure-type sealing member has a ring shape, and a frame-shaped seal slidably or fixed to an inner peripheral surface of the body so as to be able to stop water. A tunnel backfilling device, comprising: a brush seal whose end is tapered while being held by the frame-shaped seal and which can be pressed against the outer peripheral surface of the tunnel structure to stop water. 5. The tunnel backfilling device according to claim 1, wherein the pressurized seal member expands and adheres to each other by supplying a fluid therein, and presses against the outer peripheral surface side of the tunnel structure. A tunnel backfill device comprising a plurality of tubular seals capable of stopping water. 6. The tunnel backfilling apparatus according to claim 1, wherein said revolving structure is provided with a coating layer forming means for forming a smooth coating layer on an excavation surface formed by said cutter. Return device. 7. The tunnel backfilling device according to claim 1, wherein the cutter has a front cutter, an outer cutter, and an inner cutter, and the inner cutter is a water jet device that ejects an abrasive. Characteristic tunnel backfill equipment. 8. The tunnel backfilling device according to claim 1, wherein an excavated object intake port is opened between the body and the pressurized seal member, and the excavated object intake port is located on the revolving body behind the cutter. And a guide means for guiding an excavated object to the excavated object intake port. 9. The tunnel backfilling device according to claim 1, wherein the inner peripheral surface of the body is located forward of the pressurizing seal member and is pressed against the outer peripheral surface of the tunnel structure in an emergency. A tunnel backfill device provided with a backup seal for wearing.