JP3721488B2 - Removal backfill shield machine and shield method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a removal backfill shield machine and a shield method suitable for use in removing and refilling various pipes buried in the ground, such as sewer pipes.
[0002]
[Prior art]
For example, a new building may be built on land where pipes such as sewer pipes and tunnels are buried in the ground. In such a case, it is necessary to remove the pipe wall from the ground and backfill, but at this time, in order to support the foundation of the building to be built later, at least the same strength as the surrounding ground can be obtained. Must be backfilled.
[0003]
Conventionally, in order to remove and refill existing pipes in this way, a so-called excavation method in which the ground surface is excavated and pipes are excavated and removed is often used.
[0004]
[Problems to be solved by the invention]
However, the conventional methods as described above have the following problems.
First, the open-cut method that has been frequently used has a problem that the amount of excavated soil is large and the labor and labor required are great. This problem becomes more prominent as the installation depth of the existing pipe is deeper. In addition to this, it will affect the surrounding environment of the surface, and if the pipe is buried in the road site or in the vicinity of it, it will have a significant impact on traffic during the construction period. Have some problems.
[0005]
In order to solve such problems, in recent years, it has been studied to apply a so-called shield method to the removal and backfilling of existing pipes.
Such a shield method uses a shield machine having a skin plate with an inner diameter larger than the outer diameter of the pipe to be removed, and crushes the existing pipe with a crushing mechanism such as a roller bit provided in this shield machine. However, the tube will be removed by propelling this shield machine.
[0006]
However, the following problems remain when adopting the shield method. That is, if the existing pipe rod is made of a concrete material, the crushing mechanism such as the roller bit is quickly worn, and it takes time and effort to replace the crushing mechanism. Further, if the existing pipe rod is made of a metal 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 to this, when the shield method is adopted, the existing pipe rod is crushed, so the influence on the surrounding ground due to removal of fragments after crushing and vibration during crushing cannot be ignored.
[0008]
The present invention has been made in consideration of the above points, and the removal and refilling of existing pipes that can be reliably removed at low cost and in a short period of time by a non-open cutting method. It is an object to provide a shield machine and a shield method.
[0009]
[Means for Solving the Problems]
The invention according to claim 1 is a shield machine that is used when removing and refilling pipe tubes buried in the ground, and the shield machine has an inner diameter larger than the outer diameter of the pipe rods. A skin plate; a propulsion mechanism for propelling the skin plate by inserting it into the ground of the outer peripheral portion of the tube rod; a cutting mechanism provided in the skin plate for cutting the tube rod from the inside; A discharge mechanism provided in the skin plate for taking the cut piece of the cut tube rod into the tube rod and discharging it forward, and a rear portion of the skin plate provided in the skin plate. And a filling mechanism for filling a filler in the space where the tube rod on the rear side of the partition wall is removed, and the partition wall is provided so as to be able to advance and retreat in the axial direction of the skin plate. And And it is configured with a septum drive mechanism for the partition advancing drive is The cutting mechanism is provided with a wall saw for cutting the pipe rod in its circumferential direction and a wall saw for cutting the pipe rod in its axial direction, and the blade of the wall saw for cutting in the axial direction includes: And extending in parallel with the axis of the tube rod and being inclined with respect to the radial direction of the tube rod It is characterized by that.
[0010]
As a result, the shield machine is inserted into the ground of the outer periphery of the pipe rod by the propulsion mechanism, the pipe rod is cut from the inside by the cutting mechanism, and the cut piece of the cut pipe rod is removed from the inside of the pipe rod by the discharge mechanism. By removing the pipe rod by taking it in the direction and discharging it forward, by filling the space where the pipe rod behind the partition wall was removed with a filling mechanism and filling the space back, Existing pipes can be removed and backfilled. Then, when the filler is filled, the partition is driven forward and backward by the partition drive mechanism, so that the filler can be air-bleeded and the like can be filled more densely.
[0011]
The invention according to claim 2 is the removal backfilling shield machine according to claim 1, wherein as the discharge mechanism, a gripping member for gripping a cut piece of the tube rod, and the gripping member in the radial direction of the tube rod It is characterized by comprising an erector device comprising a gripping member moving mechanism for moving the gripping member and a turning mechanism for turning the gripping member in the circumferential direction of the pipe rod.
[0012]
With this erector device, the cutting piece of the tubule cut by the cutting mechanism with the gripping member is gripped by the gripping member, the gripping member is moved by the gripping member moving mechanism, the cutting piece is pulled out, and this is swung by the turning member, Further, the cut piece can be discharged by placing the cut piece on a carriage or the like.
[0013]
The invention according to claim 3 is the removal backfilling shielding machine according to claim 1 or 2, wherein the shielding machine is fixed to the shielding machine when the pipe rod is cut by the cutting mechanism. It is characterized in that a gripper that is extended and retracted toward the inner peripheral surface of the tube to be removed is provided.
[0014]
Thereby, if a gripper is pressed on the inner peripheral surface of a pipe rod, it can prevent that a shield machine shifts | deviates by the reaction force produced when a pipe rod is cut | disconnected by a cutting mechanism.
[0015]
The invention according to claim 4 is the removal backfilling shield machine according to any one of claims 1 to 3, wherein the shield machine takes a reaction force against the pipe rod to be removed ahead. It is characterized by having a retracting mechanism for retreating.
[0016]
Thereby, the shield machine can be moved backward.
[0017]
The invention according to claim 5 is the removal backfilling shielding machine according to claim 4, wherein the shielding machine has an inner peripheral surface of the skin plate, and the pipe plate to be removed on the inner side of the skin plate. And a sealing member that seals the skin plate against the movement of the skin plate in both forward and backward directions.
[0018]
As a result, not only when the shield machine is moved forward, but also when the shield machine is moved backward, the sealing performance of the gap between the skin plate and the tube can be secured.
[0019]
The invention according to claim 6 is a method of removing and refilling pipes buried in the ground, and a shield machine provided with a skin plate having an inner diameter larger than the outer diameter of the pipes with propulsion means Insert into the ground of the outer periphery of the tube, A wall saw provided in the skin plate and extending in parallel with an axis of the wall rod for cutting the tube wall in its circumferential direction, and arranged inclined with respect to the radial direction of the tube wall After cutting the tube rod from the inside by a cutting mechanism each having a wall saw for cutting the tube rod in the axial direction with a blade that is In addition, the cut piece of the cut tube tube is taken into the tube tube by a discharge mechanism provided in the skin plate, and the tube tube is removed by discharging the tube tube forward, and the inside of the skin plate The space is backfilled by moving the partition wall back and forth while filling the space behind the partition wall provided so as to close the wall with a filling mechanism.
[0020]
As a result, the pipe can be removed and backfilled. Further, when filling the filler, the filler can be reliably filled by moving the partition wall back and forth.
[0021]
DETAILED DESCRIPTION OF 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 with reference to FIGS. 1 to 7.
[0022]
FIG. 1 and FIG. 2 show a state in which pipes such as existing sewer pipes buried in the ground are removed and backfilled. In this figure, symbol G denotes the ground, and A denotes the ground G. For example, an existing pipe rod 1 made of, for example, a concrete pipe, a ductile cast iron pipe, etc., 1 indicates a shield machine used for removing the pipe rod A and backfilling.
[0023]
The shield machine 1 includes a cylindrical skin plate 2 that forms an outer shell, a partition wall 3 that closes the rear end portion of the skin plate 2, a cutting mechanism 4 for cutting the tube rod A, and the cut tube rod A. A discharge mechanism 5 for carrying out the cut pieces, 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 pipe rod A It is configured.
[0024]
As shown in FIG. 2, the skin plate 2 has an inner diameter that is slightly larger than the outer diameter of the existing tube rod A, and a substantially disc-shaped support portion 8 is integrally formed therein. Yes. Further, for example, a cylindrical main beam 9 extending in parallel with the central axis of the skin plate 2 is attached to the front of the support portion 8 (left side in the figure).
[0025]
As shown in FIGS. 2 and 3, the front end portion of the main beam 9 is provided with three grippers 10 extending in, for example, three directions around the main beam 9. Each gripper 10 includes a drive cylinder 10 a that is driven to extend and contract along the radial direction of the skin plate 2, and a grip member 10 b that is provided at the distal end of the drive cylinder 10 a and pressed against the inner peripheral surface of the pipe rod A. Has been.
[0026]
As shown in FIG. 2, the partition wall 3 includes a disk-shaped partition wall body 3 a and a cylindrical extending portion 3 b extending from the partition wall body 3 a into the skin plate 2. The partition wall 3 is a separate body from the skin plate 2 and can be moved forward and backward in the axial direction of the skin plate 2. A slide jack (partition wall drive mechanism) 11 that extends and contracts in the axial direction of the skin plate 2 is provided between the partition wall body 3a of the partition wall 3 and the support portion 8, and the slide jack 11 is driven to extend and contract. Thus, the partition 3 is driven to advance and retract with a predetermined stroke. Further, a seal member 12 is provided between the outer peripheral surface of the extending portion 3 b of the partition wall 3 and the inner peripheral surface of the skin plate 2. In addition, the code | symbol 13 in a figure is the reinforcement rib provided between the partition main body 3a and the extension part 3b.
[0027]
As shown in FIGS. 2 and 4, the cutting mechanism 4 includes wall saws 14 and 15 provided in the main beam 9.
[0028]
The blade 14a of the wall saw 14 is located in a plane perpendicular to the axis of the skin plate 2 so as to cut the pipe rod A in the circumferential direction. The wall saw 14 is disposed on the outer peripheral side of the main beam 9 and is pivotally driven around its axis by a turning motor 16a. The wall saw 14 is integrally provided with the turning member 16 and has a diameter of the skin plate 2. It is provided via a telescopic cylinder 17 that is telescopically driven along the direction. As a result, in the wall saw 14, the rotationally driven blade 14 a is moved in the radial direction of the skin plate 2 by the telescopic cylinder 17, and further swung in the circumferential direction in the skin plate 2 by the swiveling member 16, thereby It is designed to cut in the circumferential direction.
[0029]
The wall saw 15 is for cutting the pipe rod A along the axial direction thereof, extends in parallel with the axis of the skin plate 2, and is attached to the revolving member 16 via a bracket 18. A long guide rail 19, a base 20 provided to be movable along the guide rail 19, and a telescopic cylinder 21 provided on the base 20 are provided. Here, the blade 15a of the wall saw 15 and the telescopic cylinder 21 are arranged in a plane inclined at a predetermined angle with respect to the radial direction of the pipe rod A. Thereby, the wall saw 15 moves the blade 15a that is driven to rotate in a direction inclined by a predetermined angle with respect to the radial direction of the skin plate 2 by the telescopic cylinder 21, and further moves the base 20 along the guide rail 19. Therefore, the pipe rod A is cut along the axial direction thereof. At this time, since the blade 15a is inclined, the cut surface is also inclined with respect to the radial direction of the pipe rod A.
[0030]
As shown in FIGS. 2 and 5, an ejector device 25 is provided as the discharge mechanism 5. The erector device 25 is generally configured by a turning base (swinging mechanism) 26, an elevating jack (gripping member moving mechanism) 27, an erector arm 28, and a grip jack (gripping member) 29.
[0031]
The swivel base 26 has a plate shape and is rotatably provided around the main beam 9. As shown in FIG. 2, a rack gear 26 a that is continuous in the circumferential direction is provided on the outer periphery of the swivel base 26. A drive motor 30 having a pinion gear 30 a meshing with the rack gear 26 a is provided on the support portion 8, and the turning base 26 is driven to turn around the axis of the main beam 9 by the drive motor 30. As shown in FIG. 5, the swivel base 26 is provided with two pairs of guide rods 31 extending in parallel to the radial direction of the skin plate 2 so as to be movable in the axial direction thereof. A mounting member 32 is integrally installed between the two. 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 being driven to extend and contract.
[0032]
The base end of the erector arm 28 is attached to the attachment member 32, and the full length of the erector arm 28 extends and contracts in a direction parallel to the axis of the skin plate 2 by the expansion and contraction drive of the slide jack 28a provided integrally. Yes. And the supporting members 33 and 33 which support the cutting piece S cut out from the pipe rod A are provided in the front-end | tip part of the erector arm 28. As shown in FIG. The grip jack 29 is driven to extend and contract along the radial direction of the skin plate 2, and is provided at the tip of the erector arm 28. A grip portion 29 a that grips the cut piece S by being screwed into the cut piece S cut out from the tube rod A is provided at the tip of the grip jack 29.
[0033]
In such an erector apparatus 25, the cutting piece S of the tube rod A is gripped by the gripping portion 29 a, the grip jack 29 is contracted and taken out, the slide jack 28 a and the lifting jack 27 are contracted, and the turning base 26 is driven by the drive motor. 30, the cut piece S is moved to the bottom side in the skin plate 2 and mounted on the carriage 34 or the like.
[0034]
As shown in FIG. 1, the propulsion mechanism 6 includes a plurality of tow rods 36, one end of which is detachably connected to a joint fitting 35 provided at the tip of the main beam 9, and these tow rods 36. And a towing device 37 for towing. The traction device 37 is provided, for example, in a shaft H excavated at a reaching point of a section where the existing pipe rod A should be removed.
In such a propulsion mechanism 6, the shield machine 1 is propelled forward (leftward in the figure) by pulling the pulling rod 36 with the pulling device 37.
[0035]
Further, as shown in FIG. 2, a back jack (retracting mechanism) 39 that is extended and retracted along the axis thereof is integrally provided in the skin plate 2. In the back jack 39, the shield machine 1 is propelled backward (rightward in the figure) by extending the tip end of the back jack 39 while pressing the end of the back jack 39 against the end of the existing pipe rod A. It is supposed to let you.
[0036]
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 filling material C created by the liquid producing device 43 shown in FIG. 1 is not shown in the injection pipe 41. It is supplied by a pump. As the filler C to be filled by the filling mechanism 7, for example, a hardened material such as cement milk or mortar and a thickener, a stabilizer, water, a quick setting material, or the like is added. A material that can be used is appropriately used.
[0037]
Further, as shown in FIGS. 2 and 6, the shield machine 1 is provided with a jet nozzle 45 that injects water or the like to stir the ground G on the outer peripheral surface side of the front end portion of the skin plate 2. .
[0038]
Further, as shown in FIG. 2, a seal member 46 is provided on the inner peripheral surface side of the skin plate 1 of the shield machine 1 so as to close a gap with the outer peripheral surface of the existing pipe rod A.
As shown in FIG. 7, the seal member 46 includes a brush portion 46a made up of a plurality of hairs, and brush pressing members 46b and 46b that hold both ends of the brush portion 46a. The brush pressing members 46 b and 46 b are fixed to the inner peripheral surface of the skin plate 2 so that the brush portion 46 a is bent inward of the skin plate 2.
[0039]
Next, a method for removing and refilling the existing pipe rod A using the shield machine 1 having the above configuration will be described.
[0040]
For this, first, as shown in FIG. 1, the shaft H is excavated at both ends of the section where the pipe rod A is to be removed. And the pipe rod A of the part exposed in the shaft H is removed. Any method may be used for removing the tube tub A used at this time.
[0041]
Next, after the shield machine 1 is suspended in the starting side shaft H, it is made to face the end portion of the pipe rod 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 reaching side, and one end of the traction rod 36 is connected to the main beam 9 of the shield machine 1.
[0042]
After that, first, water or the like is sprayed from the jet nozzle 45 at the tip of the skin plate 2 shown in FIG. 2 to soften the ground G on the outer periphery of the pipe rod A, and the traction device 37 of the propulsion mechanism 6 By pulling the tow rod 36, the skin plate 2 of the shield machine 1 is inserted into the ground G on the outer peripheral side of the pipe rod A.
[0043]
Then, when the predetermined length of the skin plate 2 is inserted into the ground G from the shaft H, cutting and removal of the pipe rod A inside the skin plate 2 is started. For this purpose, first, the gripper 10 is extended and the grip member 10b is pressed against the tube rod A, thereby fixing the shield machine 1 so that it is not displaced by the reaction force at the time of cutting.
[0044]
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, so that the pipe rod A is moved from the inner side to the pipe rod A by 14 in the axial direction of the pipe rod A. Cut along. Thereby, the pipe rod A is in a state of being “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 rod A.
[0045]
Subsequently, the wall saw 14 of the cutting mechanism 4 is operated, and the swivel member 16 is rotated around the axis of the main beam 9 in a state in which the wall saw 14 is extended to the outer peripheral side by the telescopic cylinder 17 to Cut in the circumferential direction. Thereby, the pipe rod A “divided into a plurality in the circumferential direction” is further “rounded”.
[0046]
Subsequently, the cut piece S of the cut tube A is gripped by the grip portion 29a of the grip jack 29 that constitutes the discharge mechanism 5, and the cut piece S is pulled out by contracting the grip jack 29, and the lifting jack 27 and The slide jack 28 a is contracted and the turning base 26 is turned to move the cut piece S to the bottom of the skin plate 2, and this is mounted on the carriage 34. And the trolley | bogie 34 carrying the cutting piece S is moved to the vertical shaft H of the arrival side, and the cutting piece S is lifted and removed with the crane 48 grade | etc.,.
[0047]
After repeating this operation and dismantling and removing the pipe rod A for one ring cut by the wall saw 14, the shield machine 1 is not removed yet by the propulsion mechanism 6 in the same manner as described above. The predetermined dimension is pushed toward
[0048]
Then, the space is backfilled by injecting the filler C from the injection pipe 41 of the filling mechanism 7 into the space behind the partition wall 3 where the removal of the pipe rod A is completed.
At this time, while injecting the filler C or after injecting the filler C, the slide jack 11 is repeatedly expanded and contracted to move the partition wall 3 back and forth. As a result, the filled material C is vented and the like is improved, and the filled material C is filled densely.
[0049]
After that, each of the above steps, that is, insertion of the shield machine 1 by the propulsion mechanism 6, cutting of the pipe rod A by the cutting mechanism 4, discharge of the cut piece S of the pipe rod A by the discharging mechanism 5, backfilling by the filling mechanism 7. The above operations are sequentially repeated, and the pipe A in a predetermined section is removed and backfilled.
[0050]
If necessary, when the shield machine 1 is retracted, the back jack 39 is extended and the shield machine 1 is retracted by obtaining a reaction force from the existing pipe rod A.
[0051]
In the removal backfill shield machine 1 and the removal backfill shield method described above, the shield machine 1 is inserted into the ground G in the outer peripheral portion of the pipe rod A by the propulsion mechanism 6, and the pipe rod A is cut inside the shield machine 1 by the cutting mechanism 4. The cut piece S of the cut tube A is taken into the inside of the tube A by the discharge mechanism 5 and discharged to fill the space behind the partition wall 3 while removing the tube A. The mechanism 7 is filled with the filler C to refill the space. In this way, the existing pipe rod A can be removed and backfilled without using the open-cut method as in the prior art, and without breaking the pipe rod A even with the shield method. As a result, the pipe A can be removed and backfilled reliably in a short construction period and at a low cost without questioning the material of the pipe A and without affecting the surrounding environment of the ground surface.
[0052]
Then, when filling the filler C, the partition 3 is driven forward and backward by the slide jack 11, so that the filling material C is vented and the like is improved so that the filling property is improved, and the filler is filled with solidity. Can improve the quality after backfilling.
[0053]
Further, the shield machine 1 is provided with a gripper 10, and is configured to fix the shield machine 1 by extending the gripper 10 and pressing it against the pipe rod A when cutting the pipe rod A with the cutting mechanism 4. As a result, it is possible to prevent the shield machine A from shifting due to the reaction force generated when the tube saw A is cut by the wall saw 14 or 15 of the cutting mechanism 4, and the cutting operation of the tube rod A is performed reliably and efficiently. be able to.
[0054]
Further, the discharge mechanism 5 is provided with an erector device 25. Thereby, the cut piece S can be discharged efficiently and securely and reliably.
[0055]
In addition, the shield machine 1 is configured to include a back jack 39. Thereby, the shield machine 1 can be moved backward as necessary.
[0056]
In addition, the seal member 46 provided on the inner peripheral surface of the skin plate 2 is composed of a brush portion 46a that is bent at both end portions and held by the pressing members 46b and 46b and bent toward the inner peripheral side. It has become. With a tail seal or the like inclined only in one direction as in the prior art, it was difficult to ensure sealing performance in both forward and backward directions, but a seal member 46 having such a brush portion 46a was adopted. By doing so, not only when the shield machine 1 moves forward, but also when the shield machine 1 moves backward, the sealing performance can be maintained, and a high water stoppage can be secured.
[0057]
In the above embodiment, there is no intention to limit the installation position of the traction device 46 of the propulsion mechanism 6 to the shaft H on the arrival side, and if the traction device 46 can be reliably fixed, It is good also as a structure installed in other places, such as the inside of pipe tube A.
[0058]
Further, the configuration of the shield machine 1 is not limited to the above-described configuration, and other configurations may be adopted as long as the existing pipe rod A is cut and removed. For example, for the wall saw 14 in the circumferential direction, the guide rail is bent according to the radius of curvature inside the pipe, the guide rail is pressed against the pipe inside with a jack, the wall saw 14 is moved along the guide rail, A configuration in which direction cutting is performed is also possible.
[0059]
Furthermore, as for the existing pipe A to be removed, not only the material but also the cross-sectional shape is not questioned, and the pipe A is not limited to a sewer pipe but may be a tunnel or the like.
[0060]
In addition, the material for the filler C may be appropriately selected according to the strength of the ground G required after the backfilling.
[0061]
Other than this, as long as it does not deviate from the gist of the present invention, any configuration may be adopted, and it is needless to say that the above-described configurations may be appropriately combined.
[0062]
【The invention's effect】
As described above, according to the removal backfilling shield machine according to claim 1, the skin plate having an inner diameter larger than the outer diameter of the pipe rod, the propulsion mechanism, and the cutting mechanism for cutting the pipe rod from the inside. A discharge mechanism for taking a cut piece of the cut tube cake into the tube tube and discharging it forward, a partition wall, and a filling mechanism for filling the space from which the tube tube behind the partition wall is removed with a filler. It has a configuration equipped with. The partition wall is provided so as to be able to advance and retract in the axial direction of the skin plate, and the partition wall is provided with a partition wall drive mechanism for driving the partition wall to advance and retract in the direction. The cutting mechanism is provided with a wall saw for cutting the pipe rod in its circumferential direction and a wall saw for cutting the pipe rod in its axial direction. It is configured to extend parallel to the axis of the rod and to be inclined with respect to the radial direction of the tube rod. . As a result, the shield machine is inserted into the ground of the outer periphery of the pipe rod by the propulsion mechanism, the pipe rod is cut from the inside by the cutting mechanism, and the cut piece of the cut pipe rod is removed from the inside of the pipe rod by the discharge mechanism. By removing the pipe rod by taking it in the direction and discharging it forward, by filling the space where the pipe rod behind the partition wall was removed with a filling mechanism and filling the space back, Existing pipes can be removed and backfilled. And, when filling the filler, the partition drive mechanism drives the partition back and forth so that the filler can be vented, etc. Quality can be improved.
[0063]
According to the removal backfilling shield machine of the second aspect, an erector device is provided as a discharge mechanism. With this erector device, the cut piece can be discharged efficiently and safely and reliably.
[0064]
According to the removed backfill shield machine according to the third aspect, the gripper is provided to fix the shield machine when the pipe rod is cut by the cutting mechanism. As a result, by pressing the gripper against the inner peripheral surface of the tube rod, it is possible to prevent the shield machine from shifting due to the reaction force generated when the tube rod is cut by the cutting mechanism, and the tube tube cutting work is reliably and efficiently performed. Can be done well.
[0065]
According to the removal backfilling shield machine according to the fourth aspect, there is provided a retracting mechanism that causes the shield machine to recede against the pipe rod to be removed ahead. Thereby, a shield machine can be retreated as needed.
[0066]
According to the removal backfilling shield machine of the fifth aspect, the seal member provided on the inner peripheral surface of the skin plate is configured to maintain the sealing performance when the skin plate moves in both forward and backward directions. As a result, not only when the shield machine is moved forward, but also when the shield machine is moved backward, the sealing performance of the gap between the skin plate and the tube can be secured.
[0067]
According to the removal 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 pipe rod is inserted into the outer peripheral portion of the pipe rod, A wall saw that is provided in the skin plate and extends in parallel with the axis of the wall saw and the pipe rod that cuts the pipe rod in its circumferential direction, and a blade that is disposed inclined with respect to the radial direction of the tube rod. After cutting the pipe rod from the inside by a cutting mechanism each having a wall saw for cutting the rod in its axial direction Then, the cut piece of the cut tube is taken in by the discharge mechanism, and the tube is removed by discharging it forward, and the partition is moved back and forth while the filler is filled in the space behind the partition by the filling mechanism. By doing so, the space is backfilled. As a result, the existing pipe can be removed and backfilled without using the open-cut method as in the prior art and without crushing the pipe even with the shield method. As a result, it is possible to reliably remove and backfill the pipes at a short construction period and at a low cost without questioning the material of the pipes and without affecting the surrounding environment on the surface. In addition, the filler can be reliably filled by moving the partition wall back and forth when filling the filler, and the quality after backfilling can be improved.
[Brief description of the drawings]
FIG. 1 is an elevational sectional view showing an example of a removal backfill shield machine and a shield method according to the present invention.
FIG. 2 is a sectional side 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 sealing member provided in the shield machine.
[Explanation of symbols]
1 Shield machine
2 Skin plate
3 Bulkhead
4 Cutting mechanism
5 Discharge mechanism
6 propulsion mechanism (propulsion means)
7 Filling mechanism
10 Gripper
11 Slide jack (partition wall drive mechanism)
25 Electa device
26 Turning base (turning mechanism)
27 Elevating jack (gripping member moving mechanism)
29 Grip jack (gripping member)
39 Back jack (retraction mechanism)
46 Sealing member
A pipe
S Cutting piece

Claims (6)

A shield machine used when removing and refilling pipes buried in the ground,
The shield machine includes a skin plate having an inner diameter larger than the outer diameter of the pipe rod, a propulsion mechanism for propelling the skin plate by inserting it into the ground of the outer peripheral portion of the pipe rod, and the skin plate A cutting mechanism provided inside for cutting the tube tub from the inside thereof, and a cut piece of the tube tube cut and provided inside the skin plate, which is taken inwardly of the tube tub and forwards it. A discharge mechanism for discharging, a partition wall provided at a rear portion of the skin plate to block the inside of the skin plate, and a filling mechanism for filling a filler in a space in which the tube rod on the rear side of the partition wall has been removed; Is provided,
The partition is provided so as to be movable back and forth in the axial direction of the skin plate, and includes a partition drive mechanism for driving the partition forward and backward .
The cutting mechanism includes a wall saw for cutting the pipe rod in its circumferential direction and a wall saw for cutting the pipe rod in its axial direction, and the blade of the wall saw for cutting in the axial direction includes: A removal backfill shield machine characterized in that it extends in parallel with the axis of the pipe rod and is inclined with respect to the radial direction of the pipe rod .   The removal backfill shield machine according to claim 1, wherein the discharge mechanism is a gripping member that grips a cut piece of the tube rod, and a gripping member moving mechanism that moves the gripping member in a radial direction of the tube rod. A removal backfill shield machine comprising: an erector device including a turning mechanism for turning the gripping member in a circumferential direction of the pipe rod.   3. The removal backfill shield machine according to claim 1 or 2, wherein the shield machine has an inner periphery of a pipe to be removed in order to fix the shield machine when cutting the pipe with the cutting mechanism. A removal backfill shield machine characterized in that a gripper that is extended and retracted toward the surface is provided.   The removal backfilling shield machine according to any one of claims 1 to 3, wherein the shield machine is provided with a retreating mechanism that causes the shield machine to recede against a pipe rod to be removed ahead. Removal backfill shield machine characterized by   5. The removal backfill shield machine according to claim 4, wherein the shield machine seals a gap between the skin plate and an inner pipe to be removed on the inner peripheral surface of the skin plate. And the sealing member is configured to maintain the sealing performance against the forward / backward movement of the skin plate in both directions. A method of removing and refilling pipes buried in the ground,
A shield machine provided with a skin plate having an inner diameter larger than the outer diameter of the tube rod is inserted into the ground of the outer peripheral portion of the tube rod by propulsion means , and is provided in the skin plate, and the tube rod is disposed in the skin plate. A wall saw for cutting in a circumferential direction and a wall saw for cutting a pipe rod in its axial direction with a blade extending parallel to the axis of the tube rod and inclined with respect to the radial direction of the tube rod; After the tube tub is cut from the inside by a cutting mechanism having each of the above, the cut piece of the cut tube tub is taken inward of the tube tub by a discharge mechanism provided in the skin plate, and this is further moved forward And removing the tube by discharging to
A removal backfill shield characterized in that the space is backfilled by moving the partition back and forth while filling the space behind the partition provided so as to close the inside of the skin plate with a filling mechanism. Construction method.

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