JPH11336479A - Removing and backfilling shield machine and shield tunneling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removing and backfilling shield machine and a shield tunneling method which can remove an existing pipe and effect backfilling by a non-cut and cover tunneling method surely at low cost within a short construction period. SOLUTION: The shield machine 1 is inserted into the ground G around the outer periphery of a pipe A by a propulsion mechanism 6 and the pipe A is cut off by a cutting mechanism 4 in the shield machine 1. While the cut pieces of the cut pipe A are taken into the pipe A by a discharge mechanism and discharged to remove the pipe A, a filling material C is filled into a space at the rear of a partition wall 3 by a filling mechanism 7 to backfill the space. And to fill the filling material C, the partition wall 3 is moved back and forth by a slide jack 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a removal and backfill shield machine and a shield construction method suitable for removing and backfilling various sewers buried underground such as sewer pipes. is there.

[0002]

2. Description of the Related Art For example, a new building may be built on land where sewers such as sewer pipes and tunnels are buried underground. In such a case, it is necessary to remove and refill the sewer from the ground, but at this time, at least the same strength as the surrounding ground is obtained to support the foundation of the building to be built later. Must be backfilled.

[0003] Conventionally, in order to remove and re-fill an existing sewer in this way, a so-called open-cutting method of excavating the ground surface, excavating the sewer, and removing it is often employed.

[0004]

However, the conventional method as described above has the following problems.
First, the open-cutting method, which has been frequently used, has a problem that a large amount of excavated soil requires a large amount of labor and labor.
This problem becomes more prominent as the installation depth of the existing sewer is deeper. In addition to this, it will affect the surrounding environment of the ground surface, and if pipes are buried in the ground on or near the road site, it will have a significant effect on traffic during the construction period. Have several problems.

[0005] In order to solve such a problem, in recent years, it has been studied to apply a so-called shield method to the removal and backfilling of an existing sewer. Such a shield method uses a shield machine with a skin plate with an inner diameter larger than the outer diameter of the sewer to be removed, and crushes the existing sewer with a crushing mechanism such as a roller bit provided in this shield machine. Meanwhile, by promoting this shield machine,
The sewer will be removed.

However, when the shield method is employed, the following problems remain. In other words, if the existing sewer is made of a concrete material, the crushing mechanism such as a roller bit wears quickly, and it takes time and effort to replace the crushing mechanism, resulting in a longer construction period and a higher cost.
Further, if the existing sewer is made of a metal-based material, it cannot be crushed by a crushing mechanism such as a roller bit, so that it is difficult to apply the shield method itself.

[0007] In addition, when the shield method is adopted, the existing sewer is crushed, so that the debris is removed after crushing, and the influence on the surrounding ground due to vibration during crushing cannot be ignored.

The present invention has been made in view of the above points, and an existing pipe can be reliably removed by a non-cutting method, at a low cost and with a short construction period, and can be backfilled. It is an object to provide a removal backfill shield machine and a shield method.

[0009]

The invention according to claim 1 is
A shield machine used for removing and backfilling a sewer buried in the ground, the shield machine comprising: a skin plate having an inner diameter larger than an outer diameter of the sewer; A propulsion mechanism for inserting and propelling into the ground of the outer peripheral portion of the sewer, a cutting mechanism provided in the skin plate and cutting the sewer from the inside thereof, and a cutting mechanism provided in the skin plate; A discharge mechanism for taking the cut piece of the sewer into the sewer and discharging it forward, a partition provided at the rear of the skin plate to close the skin plate, A filling mechanism for filling the space into which the sewer on the rear side has been removed with a filler, the partition is provided so as to be able to advance and retreat in the axial direction of the skin plate, and the partition is driven to advance and retreat. Let It is characterized in that has a configuration including a fit of the partition drive.

[0010] Thus, the shield machine is inserted into the ground around the outer periphery of the sewer by the propulsion mechanism, the sewer is cut from the inside by the cutting mechanism, and a cut piece of the cut sewer is piped by the discharge mechanism. By taking in the inside of the culvert and discharging it forward, the culvert is removed, and the space where the culvert behind the bulkhead is removed is filled with filler by the filling mechanism to fill the space back. As a result, the existing sewer can be removed and backfilled. When the filler is filled, the partition is driven forward and backward by the partition driving mechanism, so that air can be removed from the filler and the filler can be more densely filled.

According to a second aspect of the present invention, there is provided the removal backfill shield machine according to the first aspect, wherein the discharge mechanism comprises:
A gripping member for gripping a cut piece of the sewer, a gripping member moving mechanism for moving the gripping member in a radial direction of the sewer, and a turning mechanism for rotating the gripping member in a circumferential direction of the sewer. Characterized by being provided with an erector device configured as described above.

[0012] With this elector device, the cut piece of the sewer cut by the cutting mechanism with the holding member is gripped by the gripping member, and the gripping member is moved by the gripping member moving mechanism to pull out the cut piece, and this is pulled by the turning member. The cut piece can be ejected by turning and turning the cut piece on a cart or the like.

The invention according to claim 3 is the invention according to claim 1 or 2
The removal backfill shield machine according to claim 1, wherein the shield mechanism is fixed to the shield machine when cutting the sewer by the cutting mechanism. A gripper to be driven is provided.

Thus, if the gripper is pressed against the inner peripheral surface of the sewer, the shield machine can be prevented from shifting due to the reaction force generated when the sewer is cut by the cutting mechanism.

According to a fourth aspect of the present invention, there is provided the removal and backfill shield machine according to any one of the first to third aspects, wherein the shield machine is provided in a position opposite to a sewer to be removed in front. It is characterized in that a retreat mechanism for retreating with force is provided.

Thus, the shield machine can be moved backward.

According to a fifth aspect of the present invention, there is provided the removal and backfill shield machine according to the fourth aspect, wherein the shield plate is provided on the inner peripheral surface of the skin plate with the skin plate and the inside thereof being removed. A seal member is provided for sealing between the skin plate and the culvert.
It is characterized in that it is configured to maintain the sealing property against the backward bidirectional movement.

Thus, the sealing performance of the gap between the skin plate and the sewer can be ensured not only when the shield machine is advanced but also when it is retracted.

According to a sixth aspect of the present invention, there is provided a method for removing and refilling a sewer buried in the ground, wherein the shield machine is provided with a skin plate having an inner diameter larger than an outer diameter of the sewer. After being inserted into the ground of the outer peripheral portion of the sewer by the propulsion means, the sewer is cut from the inside by a cutting mechanism provided in the skin plate, and a cut piece of the cut sewer is inserted into the skin plate. The drainage mechanism is provided with a drainage mechanism, and the drainage pipe is removed by discharging the drainage pipe to the front, and the filler is filled in a space behind a partition wall provided to close the skin plate. The space is backfilled by moving the partition wall back and forth while filling with.

As a result, the sewer can be removed and backfilled. In addition, the filler can be reliably filled by moving the partition wall back and forth when filling the filler.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example of an embodiment of a removal backfill shield machine and a shield method according to the present invention will be described.
This will be described with reference to FIGS.

FIGS. 1 and 2 show a state in which a sewer such as an existing sewer pipe buried underground is removed and backfilled. In this figure, reference symbol G denotes ground, and A denotes ground. An existing culvert made of, for example, a concrete pipe, a ductile cast iron pipe or the like buried in G indicates a shield machine used for removing and refilling the culvert A.

The shield machine 1 has a cylindrical skin plate 2 forming an outer shell, a partition wall 3 for closing the rear end of the skin plate 2, a cutting mechanism 4 for cutting the sewer A,
Ejection mechanism 5 for unloading cut pieces of sewer A
And a propulsion mechanism (propulsion means) 6 for propelling the shield machine 1 and a filling mechanism 7 for refilling the space after removal of the sewer A.

As shown in FIG. 2, the skin plate 2
It has an inner diameter slightly larger than the outer diameter of the existing sewer A, and a substantially disk-shaped support portion 8 is integrally formed therein. A main beam 9 having, for example, a cylindrical shape and extending in parallel with the center axis of the skin plate 2 is attached to the front (left side in the figure) of the support portion 8.

As shown in FIGS. 2 and 3, at the tip of the main beam 9, for example, three grippers 10 extending in three directions around the periphery are provided. Each gripper 10 includes a drive cylinder 10a that is driven to expand and contract along the radial direction of the skin plate 2, and a grip member 10b provided at the distal end of the drive cylinder 10a and pressed against the inner peripheral surface of the sewer A. Have been.

As shown in FIG. 2, the partition 3 is composed of a disk-shaped partition main body 3a and a cylindrical extension 3b extending from the partition main body 3a into the skin plate 2. The partition 3 is separate from the skin plate 2, and is movable in the axial direction of the skin plate 2. A slide jack (partition drive mechanism) 11 that is driven to expand and contract in the axial direction of the skin plate 2 is provided between the partition body 3a of the partition 3 and the support portion 8, and the slide jack 11 is driven to expand and contract. Thereby, the partition 3 is driven to advance and retreat with a predetermined stroke. A seal member 12 is provided between the outer peripheral surface of the extension 3 b of the partition 3 and the inner peripheral surface of the skin plate 2.
Reference numeral 13 in the drawing is a reinforcing rib provided between the partition wall main body 3a and the extension 3b.

As shown in FIGS. 2 and 4, the cutting mechanism 4
Are the wall saws 14, 1 provided on the main beam 9.
5 is comprised.

The blade 14a of the wall saw 14 is located in a plane perpendicular to the axis of the skin plate 2 to cut the sewer A in the circumferential direction. The wall saw 14 is a cylindrical turning member 16 which is arranged on the outer peripheral side of the main beam 9 and is turned around its axis by a turning motor 16a.
And the skin plate 2 provided integrally with the turning member 16.
And a telescopic cylinder 17 that is driven to expand and contract along the radial direction. Thereby, in the wall saw 14, the blade 14 a, which is rotationally driven, is moved in the radial direction of the skin plate 2 by the telescopic cylinder 17.
6 to rotate in the circumferential direction in the skin plate 2,
Is cut in the circumferential direction.

The wall saw 15 is for cutting the sewer A along its axial direction, extends in parallel with the axis of the skin plate 2, and is attached to the turning member 16 via the bracket 18. Guide rail 1 of specified length
9, a base 20 movably provided along the guide rail 19, and a telescopic cylinder 21 provided on the base 20. Here, the blade 15a of the wall saw 15 and the telescopic cylinder 21 are connected to the sewer A
Are arranged in a plane inclined at a predetermined angle with respect to the radial direction. Thereby, the wall saw 15 moves the blade 15 a that has been rotationally driven by the telescopic cylinder 21 in a direction inclined by a predetermined angle with respect to the radial direction of the skin plate 2, and further moves the base 20 along the guide rail 19. Thereby, the sewer A is cut along its axial direction. At this time, since the blade 15a is inclined, the cut surface is also inclined with respect to the radial direction of the sewer A.

As shown in FIGS. 2 and 5, the discharge mechanism 5 includes an erector device 25. The elector device 25 is roughly composed of a turning base (turning mechanism) 26, a lifting jack (holding member moving mechanism) 27, an elector arm 28, and a grip jack (holding member) 29.

The revolving base 26 has a plate shape and is rotatably provided around the main beam 9. As shown in FIG. 2, a rack gear 26a which is continuous in the circumferential direction is provided on the outer peripheral portion thereof. ing. A drive motor 30 provided with a pinion gear 30a that meshes with the rack gear 26a is provided on the support portion 8. The drive motor 30 drives the turning base 26 to turn around the axis of the main beam 9. As shown in FIG. 5, a pair of two guide rods 31 extending parallel to the radial direction of the skin plate 2 are provided on the revolving base 26 so as to be movable in the axial direction. Mounting member 3 between
2 are integrally installed. The lifting jack 27 is provided along each guide rod 31, and the guide rod 31 is driven to advance and retreat in the radial direction of the skin plate 2 by expanding and contracting the guide rod 31.

The base end of the erector arm 28 is attached to a mounting member 32, and the entire length of the erector arm 28 expands and contracts in a direction parallel to the axis of the skin plate 2 by expansion and contraction driving of a slide jack 28a provided integrally. It has become. The support members 33, 3 for supporting the cut pieces S cut out from the culvert A are provided at the tip of the erector arm 28.
3 are provided. The grip jack 29 is driven to expand and contract along the radial direction of the skin plate 2, and is provided at the tip of the erector arm 28. The distal end of the grip jack 29 is provided with a grip portion 29a for gripping the cut piece S by, for example, screwing the cut piece S cut out from the sewer A.

In such an elector device 25, the cut piece S of the pipe A is gripped by the grip portion 29a, and the grip piece 29 is contracted and taken out. Further, the slide jack 28a and the lifting jack 27 are contracted, and the turning base 26
Is turned by the drive motor 30 to move the cut piece S to the bottom side in the skin plate 2 and mount it on the carriage 34 or the like.

As shown in FIG. 1, the propulsion mechanism 6 has a plurality of traction rods 3 whose one end is detachably connected to a joint fitting 35 provided at the tip of the main beam 9.
6 and a towing device 37 for towing these towing rods 36
It is composed of The traction device 37 is, for example, a shaft H excavated at a reaching point of a section where the existing pipe A is to be removed.
It is provided within. In such a propulsion mechanism 6, the shield machine 1 is propelled forward (to the left in the drawing) by towing the towing rod 36 with the towing device 37.

Further, as shown in FIG. 2, a back jack (retreat mechanism) 39 which is driven to expand and contract along its axis is integrally provided in the skin plate 2. In this back jack 39, the tip is connected to the existing sewer A
By stretching while pressing against the end of
The shield machine 1 is propelled backward (to the right in the figure) by obtaining a reaction force.

As the filling mechanism 7, an injection pipe 41 is attached to a supply hole (not shown) formed in the partition wall 3, and the injection pipe 41 has a filler C formed by the liquid producing device 43 shown in FIG. Is supplied by a pump or the like (not shown). As the filler C to be filled by the filling mechanism 7, for example, a hardening material such as cement milk or mortar, to which a thickener, a stabilizer, water, a quick-setting material, and the like are added, and the surrounding ground
A material capable of obtaining the same strength as that described above is appropriately used.

As shown in FIGS. 2 and 6, the shield machine 1 is provided with a jet nozzle 45 for injecting water or the like for stirring the ground G, on the outer peripheral surface side of the tip of the skin plate 2. Have been.

Further, as shown in FIG. 2, on the inner peripheral surface side of the skin plate 1 of the shield machine 1, a seal member 46 for closing a gap with the outer peripheral surface of the existing pipe A is provided. As shown in FIG. 7, the seal member 46 includes a brush portion 46a made of a large number of hairs, and brush pressing members 46b, 46b for holding both ends of the brush portion 46a. And the brush part 46a is the skin plate 2
Brush holding member 4 so as to be bent inside.
6 b and 46 b are fixed to the inner peripheral surface of the skin plate 2.

Next, a method of removing and backfilling the existing culvert A using the shield machine 1 having the above configuration will be described.

First, as shown in FIG. 1, a shaft H is excavated at both ends of a section from which the sewer A is to be removed. Then, the pipe A exposed in the shaft H is removed. Any method of removing the sewer A used at this time may be used.

Next, the shield machine 1 is set in the shaft H on the starting side.
Is suspended, and is made to face the end of the pipe A exposed on the side wall surface of the shaft H. Further, a traction device 37 of the propulsion mechanism 6 is installed in the shaft H on the arrival side, and one end of the traction rod 36 is connected to the main beam 9 of the shield machine 1.

Thereafter, first, water or the like is jetted from the jet nozzle 45 at the tip of the skin plate 2 shown in FIG.
By pulling the towing rod 36 with the towing device 37, the skin plate 2 of the shield machine 1 is inserted into the ground G on the outer peripheral side of the sewer A.

When the predetermined length of the skin plate 2 is inserted from the shaft H into the ground G, the skin plate 2
Of the culvert A inside the vessel is started. First of all,
Extend the gripper 10 and connect the grip member 10b to the sewer A
To the shield machine 1 by the reaction force at the time of cutting.
Fix it so that it does not shift.

Next, the wall saw 15 is operated, and the base 20 is moved along the guide rail 19 in a state where the wall saw 15 is extended to the outer peripheral side by the telescopic cylinder 21. Cut along the axial direction of. As a result, the sewer A is "divided into a plurality in the circumferential direction". In addition, each cut surface by the wall saw 15 at this time is inclined at a predetermined angle with respect to the radial direction of the pipe A.

Subsequently, the wall saw 14 of the cutting mechanism 4 is operated, and the turning member 16 is rotated around the axis of the main beam 9 in a state where the wall saw 14 is extended to the outer peripheral side by the telescopic cylinder 17, whereby the pipe A From the inside in the circumferential direction. As a result, the sewer A that has been “divided into a plurality of pieces in the circumferential direction” is in a state of being further “round-cut”.

Then, the cut piece S of the cut pipe A is
The grip part 2 of the grip jack 29 constituting the discharge mechanism 5
9a, the cut piece S is pulled out by contracting the grip jack 29, the lifting jack 27 and the slide jack 28a are further contracted, and the turning base 26 is turned to move the cut piece S to the bottom in the skin plate 2. This is mounted on a carriage 34. Then, the bogie 34 on which the cut pieces S are mounted is moved to the shaft H on the arrival side, and the cut pieces S are lifted and removed by the crane 48 or the like.

After this operation is repeated and the pipe A for one ring cut by the wall saw 14 is dismantled and removed, the shield machine 1 is removed by the propulsion mechanism 6 in the same manner as described above. Propulsion is performed to the predetermined size toward the culvert A side.

Then, the filling material C is injected from the injection pipe 41 of the filling mechanism 7 into the space on the rear side of the partition wall 3 where the removal of the conduit A has been completed, thereby refilling the space. At this time, while the filler C is being injected or after the filler C is injected, the slide jack 11 is repeatedly driven to expand and contract to move the partition wall 3 back and forth. As a result, the filled filler C is evacuated and the like, and its filling property is enhanced.
Filler C is densely filled.

Thereafter, each of the above steps, namely, insertion of the shield machine 1 by the propulsion mechanism 6, cutting of the sewer A by the cutting mechanism 4, discharge of the cut pieces S of the sewer A by the discharge mechanism 5, and filling mechanism 7 The operation of backfilling is repeated sequentially, and the sewer A in a predetermined section is removed and backfilled.

When the shield machine 1 is to be retracted, if necessary, the back jack 39 is extended, and the shield machine 1 is retracted by obtaining a reaction force on the existing pipe A.

In the above-described removal and backfill shield machine 1 and the removal and backfill shield construction method, the shield machine 1 is inserted into the ground G on the outer peripheral portion of the culvert A by the propulsion mechanism 6, and the cutting mechanism 4 inside the shield machine 1. Cut the sewer A,
The cut piece A of the cut pipe A is taken into the inside of the pipe A by the discharge mechanism 5 and discharged, thereby removing the pipe A and filling the space behind the partition 3 with the filling mechanism 7. Material C
And the space is backfilled. In this way, the existing conduit A can be removed and backfilled without using the open-cutting method as in the related art and without breaking the conduit A even with the shield method. This makes it possible to reliably perform the removal and backfilling of the sewer A in a short construction period and at low cost without asking the material of the sewer A and without affecting the surrounding environment of the ground surface.

When the filler C is filled, the partition 3 is driven forward and backward by the slide jack 11, so that the filled filler C is evacuated and the filling property is improved. It can be filled tightly and the quality after backfilling can be improved.

The shield machine 1 includes a gripper 10.
When cutting the sewer A by the cutting mechanism 4, the gripper 10 is extended and pressed against the sewer A, and the shielding machine 1
Is fixed. Thereby, the cutting mechanism 4
Can prevent the shield machine A from shifting due to the reaction force generated when the pipe A is cut by the wall saw 14 or 15, and the cutting operation of the pipe A can be performed reliably and efficiently.

Further, the discharge mechanism 5 is provided with an erector device 25. Thus, the cut pieces S can be efficiently, safely, and reliably discharged.

In addition, the shield machine 1 is provided with a back jack 39. Thereby, if necessary, the shield machine 1 can be moved backward.

In addition, a sealing member 46 provided on the inner peripheral surface of the skin plate 2
b, 46b, the brush portion 46a is bent toward the inner peripheral side. With a conventional tail seal or the like that is inclined only in one direction, it is difficult to secure the sealing performance in both forward and backward directions. However, a seal member 46 having such a brush portion 46a is used. By doing so, not only when the shield machine 1 moves forward, but also when the shield machine 1 retreats, the sealing performance can be maintained, and high water stopping performance can be secured.

In the above embodiment, the towing device 46 of the propulsion mechanism 6 is not intended to limit its installation position to the shaft H on the arrival side. It is good also as a structure installed in another place, such as in the sewer A ahead of a direction.

The configuration of the shield machine 1 is not limited to the above-described one, and other configurations may be adopted as long as the existing pipe A is cut and removed. For example, regarding the circumferential wall saw 14,
A configuration is also possible in which the guide rail is bent in accordance with the radius of curvature of the inside of the tube, the guide rail is pressed against the inside of the tube with a jack, and the wall saw 14 is moved along the guide rail to make a circumferential cut.

Further, as for the existing sewer A to be removed, there is no question as to the material, of course, the cross-sectional shape, etc. Further, the sewer A is not limited to the sewer pipe, but may be a tunnel or the like. Is also good.

In addition, the material of the filler C may be appropriately selected according to the strength of the ground G required after backfilling.

Other than this, any configuration may be adopted as long as it does not depart from the gist of the present invention, and it is needless to say that the above-mentioned configurations may be selectively combined as appropriate. No.

[0062]

As described above, according to the removal and backfill shield machine of the first aspect, the skin plate having the inner diameter larger than the outer diameter of the sewer, the propulsion mechanism, and the sewer are connected from the inside. A cutting mechanism that cuts, a discharge mechanism that takes in the cut piece of culvert into the culvert and discharges it forward, and fills the bulkhead and the space where the culvert behind the bulkhead is removed with filler. And a filling mechanism. The partition is provided so as to be able to advance and retreat in the axial direction of the skin plate, and the partition is provided with a partition drive mechanism for driving the partition to advance and retreat in the direction. With this, the shield machine is inserted into the outer periphery of the sewer by the propulsion mechanism, the sewer is cut from the inside by the cutting mechanism, and the cut piece of the cut sewer is discharged into the sewer by the discharge mechanism. By removing the sewer by taking it in and discharging it forward, filling the space where the sewer behind the bulkhead has been removed with the filling mechanism and filling back the space, Existing drains can be removed and backfilled. When the filler is filled, the partition wall is driven forward and backward by the partition drive mechanism, thereby evacuating the filler, improving the filling property, and filling the filler densely. Quality can be improved.

According to the second embodiment of the present invention, the ejector device is provided as an ejection mechanism. With this erector device, the cut pieces can be discharged efficiently, safely and reliably.

According to the third aspect of the present invention, the gripper for fixing the shield machine when the sewer is cut by the cutting mechanism is provided. By pressing the gripper against the inner peripheral surface of the sewer, the shield machine can be prevented from shifting due to the reaction force generated when the sewer is cut by the cutting mechanism, and the sewer cutting work can be performed reliably and efficiently. Can do well.

According to a fourth aspect of the present invention, there is provided a retreating mechanism for retreating the shield machine by applying a reaction force to the sewer to be removed in front. As a result, the shield machine can be moved backward if necessary.

According to the removal and back-filling shield machine of the fifth aspect, the seal member provided on the inner peripheral surface of the skin plate maintains the sealing property when the skin plate moves in both the forward and backward directions. . Thereby, not only when the shield machine is advanced but also when the shield machine is retracted, the sealing property of the gap between the skin plate and the sewer can be ensured.

According to the removal and backfill shield method according to claim 6, a shield machine provided with a skin plate having an inner diameter larger than the outer diameter of the sewer is inserted into the outer peripheral part of the sewer,
After the sewer is cut from the inside by the cutting mechanism, the cut sediment is removed by taking in the cut piece of the sewer by the discharge mechanism and discharging it forward, and the space behind the bulkhead is filled. The space is backfilled by moving the partition wall back and forth while filling the filler with the mechanism. As a result, the existing sewer can be removed and backfilled without using the open-cutting method as in the related art and without breaking the sewer even with the shield method. This makes it possible to reliably remove and refill the sewer in a short period of time and at low cost, regardless of the material of the sewer and without affecting the surrounding environment of the ground surface. In addition, by moving the partition wall back and forth when filling the filler, the filler can be reliably filled, and the quality after backfilling can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional elevational view showing an example of a removed backfill shield machine and a shield method according to the present invention.

FIG. 2 is a side sectional view of the shield machine.

FIG. 3 is a front sectional view showing a gripper provided in the shield machine.

FIG. 4 is a front sectional view showing a cutting mechanism provided in the shield machine.

FIG. 5 is a front sectional view showing a discharge mechanism provided in the shield machine.

FIG. 6 is a side sectional view showing a part of the shield machine.

FIG. 7 is a side sectional view and a plan view showing a seal member provided in the shield machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield machine 2 Skin plate 3 Partition wall 4 Cutting mechanism 5 Discharge mechanism 6 Propulsion mechanism (propulsion means) 7 Filling mechanism 10 Gripper 11 Slide jack (partition drive mechanism) 25 Elector device 26 Revolving base (revolving mechanism) 27 Elevating jack (gripping member) (Movement mechanism) 29 Grip jack (gripping member) 39 Back jack (retreat mechanism) 46 Seal member A Sewer S Cut piece

Claims (6)

[Claims] 1. A shield machine used for removing and backfilling a sewer buried underground, comprising: a skin plate having an inner diameter larger than an outer diameter of the sewer. A propulsion mechanism for inserting and propelling the skin plate into the ground at an outer peripheral portion of the sewer, a cutting mechanism provided in the skin plate for cutting the sewer from the inside thereof, A discharge mechanism that is provided with a cut piece of the cut sewer, takes in the inside of the sewer, and discharges this forward.
A partition wall provided at a rear portion of the skin plate to close the skin plate; and a filling mechanism for filling a filling material into a space in which the sewer has been removed on the rear side of the partition wall. Is provided so as to be able to advance and retreat in the axial direction of the skin plate, and is provided with a partition driving mechanism for driving the partition to reciprocate. 2. The removal and back-filling shield machine according to claim 1, wherein, as the discharge mechanism, a gripping member for gripping a cut piece of the sewer, and the gripping member is moved in a radial direction of the sewer. A removal and backfill shield machine, comprising: an erector device configured to include a gripping member moving mechanism and a turning mechanism for turning the gripping member in a circumferential direction of the sewer. 3. The removal backfill shield machine according to claim 1 or 2, wherein the shield machine is to be removed to fix the shield machine when the sewer is cut by the cutting mechanism. A removal and backfill shield machine comprising a gripper that is driven to expand and contract toward an inner peripheral surface of a sewer. 4. The removal and backfill shield machine according to claim 1, wherein the shield machine retreats the shield machine by applying a reaction force to a front duct to be removed. A removal backfill shield machine characterized by having a retreat mechanism. 5. The removal and backfill shield machine according to claim 4, wherein said shield machine has an inner peripheral surface between said skin plate and said sewer to be removed. A refilling shield machine, characterized in that a sealing member is provided for sealing the skin plate, and the sealing member is configured to maintain the sealing property against the forward and backward movement of the skin plate in both directions. 6. A method of removing and backfilling a sewer buried underground, wherein a propulsion means is used to apply a shield machine provided with a skin plate having an inner diameter larger than the outer diameter of the sewer. After being inserted into the ground of the outer peripheral portion of the pipe and cutting the sewer from the inside with a cutting mechanism provided in the skin plate,
The cut piece of the sewer is taken into the sewer by the discharge mechanism provided in the skin plate, and the sewer is removed by discharging the sewer further forward, and the inside of the skin plate is removed. A removal and backfill shield method, wherein the space is backfilled by moving the partition back and forth while filling a space behind the partition wall provided so as to close with a filler.