JP2001059584A - Reclamation of pipe conduit constructed by shield method, and shielding device for reclamation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save man power, and to shorten a term of work, in a reclaiming method for laying replacingly an old pipe conduit constructed by a shielding method such as an old sewerage pipe into a pipe conduit of large size reclamation-constructed by a shielding method using a reclaiming shield device by a non-excavation means. SOLUTION: This shielding device A1 presses a skin plate 3 to an arrival vertical shaft H2 side by an advancing jack 2 while receiving reaction from a back-filling part K formed by filling a filler F into a rear cavity part E in an advancing vertical shaft H1, and bores by a rotary cutter 4 an outer peripheral ground G of a pipe conduit B constructed by a shielding method. A drilled sediment J therein is introduced into a hydraulic chamber 6 formed between the rotary cutter 4 and an inner pipe 5 to make it into muddy water by pressurized water W, so as to be discharged from a sludge withdrawal pipe 6b. A secondary lining b2 is removed by a crushing part 8b of an errector 8 as to a segment (b) for one ring in a condition where a segment is prevented from intruding by a segment seal 5c so as to remove a joint bolt 3, the segment (b) is demolished to be removed by a grip part 8a, and a pipe conduit L reclamation-constructed by a shielding method is laid in the back-filling part K.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a rehabilitation method for replacing an old sewer pipe or the like constructed by a shield method with a new sewer having a larger size by a shield method or a propulsion method. The present invention relates to a rehabilitation shield device that can be used for carrying out these rehabilitation methods.

[0002]

2. Description of the Related Art With the spread of sewers in recent years, the number of those that have reached the end of their service life has increased, and not only sewers with markedly deteriorated sewer materials have actually existed, but also land use has advanced. Sewage and rainwater flow are also increasing due to the high quality of life and the quality of life, and conventional sewers are no longer able to fulfill their functions. Therefore, there is a need for technical development for rehabilitating the old pipes as described above and replacing them with large-sized pipes in order to eliminate the shortage of processing capacity of conventional pipes. Therefore, as a technique for rehabilitation and expansion of aging pipes, re-laying by open cut method has been adopted and implemented as a basic method.However, due to the recent impact on road traffic conditions and civil life, road managers and underground burial companies There are also problems such as private negotiations with the body and adjustment of underground buried objects. As a result, it is extremely difficult to make various adjustments before actually starting construction.
Therefore, in recent years, there has been an urgent need for technical development of a sewer rehabilitation method based on a so-called non-drilling method, which does not require excavation above a water pipe burial site in order to solve the above-described problem.

[0003] For this reason, various methods have been proposed as non-cutting methods, especially for reinforced concrete pipes, porcelain pipes, synthetic resin pipes, and the like, and for rehabilitation equipment that can be provided therefor. There are few provisions on the technical contents of pipes by connecting the segments, and there is no one that can sufficiently satisfy the improvement of workability.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems of the prior art. When the method of rehabilitating a construction sewer according to the first aspect of the present invention, a rehabilitation shield device is used. Then, the rotary cutter is pushed while rotating to excavate the outer ground of the shield method construction sewer, but at this time, pressurized water flows into the hydraulic pressure chamber where the excavated earth and sand penetrate and muddy, This is discharged through a mud pipe, thereby trying to enable rapid automatic discharge of excavated earth and sand without human intervention. Further, in the present invention, the filling material from the filling machine is pressure-fed to the rear cavity portion of the rehabilitation shield device to form a backfill portion, and the rehabilitation shield device is dug by the propulsion jack in search of a reaction force. Thus, an efficient rehabilitation method can be implemented without spending undesired downtime.

According to the first aspect, the same erector as in the known shield excavator is used. At this time, the secondary covering of one segment of the shield-construction-constructed sewer closest to the crushing section specially provided for the erector is used. After crushing the work, remove the segment joint bolt and use the segment hanging hand fitting by the grip part of the erector, so that the segment can be dismantled and removed. I can go. Further, in the present invention, using the above-described backfilling unit,
The purpose is to be able to lay a new shielded construction sewer with a large size from the start shaft to the arrival shaft in a timely manner without any trouble.

A second aspect of the present invention relates to a rehabilitation shield device for carrying out the rehabilitation method of the first aspect, wherein the substrate portion takes a reaction force to the backfill portion, and the substrate portion is deflected by a propulsion jack. And a skin plate connected in a pushable manner, a rotary cutter fitted on the inner periphery thereof, and a hydraulic chamber formed between an inner pipe fitted on the inner periphery and a rotary frame of the rotary cutter. And a backfill pipe that feeds the filler from the filling machine to the rear cavity described above, and prevents cutting sand from entering between the inner pipe and the outer peripheral surface of the segment. The rehabilitation method of claim 1 can be quickly and safely implemented by appropriately providing a segment seal, an erector having a crushing portion for segment disassembly removal and a grip portion for ensuring a safe operation. Try to get That.

According to a third aspect of the present invention, in addition to the refilling method of the first aspect, the injection pressure of the filler is further reduced.
When a phenomenon occurs that the rehabilitation shield device is pushed at an unintended speed due to the external pressure propulsion force based on the ground water pressure and earth pressure, the overpropulsion prevention jack that acts by reacting to the segment It is an object of the present invention to suppress the above-mentioned phenomenon by operation and thereby to make it possible to maintain a desired excavation speed of the rotary cutter and to ensure smooth excavation by the rotary cutter.

Next, in the rehabilitation shield device of the fourth aspect, in order to enable the rehabilitation method of the third aspect to be implemented, the cylinder of the overpropulsion prevention jack is provided in the inner cylinder of the second aspect. An attempt is being made to provide a rehabilitation shield device which is fixed and allows the ram to be freely pressed against the end of the segment.

According to the rehabilitation method of the fifth aspect, a reaction force is not required in the backfill portion formed in the rear cavity of the rehabilitation shield device as in the first to fourth aspects. From the starting shaft side, the propulsion method is used to sequentially push and propel the prefabricated pipes larger than the shielded construction pipe, and take the reaction force to the prefabricated pipes to push the rehabilitation shield device. ing. In this way, the present invention is not a newly constructed shielded construction sewer, but in parallel with the dismantling and removal work of old sewers, etc., a large-sized propulsion construction rehabilitation construction sewer with new reinforced concrete pipes, etc. The main purpose is to finish laying in the building.

Further, in the case of claim 6, the above-mentioned claim 5
The rehabilitation shield device for performing the rehabilitation method according to the above is intended to satisfactorily implement the rehabilitation method of the fifth aspect in the same manner as in the second aspect.

According to the rehabilitation method of the present invention, not only the reaction force is required for the ready-made tube described above, but also the overpropulsion prevention jack can be operated in a timely manner.
The purpose is to enable the two components to exhibit a synergistic effect.
In the rehabilitation shield device according to the sixth aspect of the present invention, the rehabilitation shield device is configured by adding an overpropulsion prevention jack to the rehabilitation shield device according to the sixth aspect of the invention, and an additive action between the two is exerted.

[0012]

In order to achieve the above object, according to the present invention, a rehabilitation shield device is operated from a starting shaft of a shield construction method constructed sewer.
The propulsion jack pushes the shaft toward the reaching shaft, and the rotary cutter on the inner circumference of the skin plate of the rehabilitation shield device is driven to rotate to excavate the outer ground of the segment in the shield construction method sewer. Is introduced into a hydraulic chamber formed separately between the rotating frame of the rotary cutter and an inner pipe fixed inside the rotary cutter. The waste soil is discharged from the arriving shaft side through a mud drainage pipe through the drain pipe, and the above-mentioned cut sand is resiliently contacted with the outer peripheral surface of the segment by the segment seal provided in the inner pipe. To prevent the intrusion into the pit, and to supply the filler from the reaching shaft side to the rear cavity on the starting shaft side of the rehabilitation shield device by the filling machine to form the backfill part. Ri, so as to continue the pusher by the propulsion jacks taking a reaction force to the backfill portion,
After stopping the excavation when one ring of the segment is located near the starting shaft of the segment seal, the segment lining bolt of the ring is removed by removing the secondary lining of the ring by the crushing part of the erector in the rehabilitation shield device. , And furthermore, the segments are dismantled and removed by using the segment hanging hand fittings by the grip portion of the erector, so that all the segments are sequentially removed, so that the backfilling section reaches the starting shaft from the starting shaft side. Side, or before the completion of the installation, and a shield rehabilitation construction culvert using a shield excavator larger in size than the removed shield erection construction culvert is laid in the backfill part. An attempt is being made to provide a method of rehabilitating a shielded construction sewer, which is characterized by having been made as described above.

A second aspect of the present invention relates to a base comprising a substrate portion and a base cylinder portion, which is slidably fitted to the base cylinder portion in a deflectable manner so that the rehabilitation method of the first aspect can be carried out. Then, a cylindrical skin plate that can be pushed by a propulsion jack, a rotating frame that is fitted on the inner periphery of the skin plate and that is driven to rotate by a cutter motor, and a tip that extends from the skin plate. A rotary cutter having a provided cutter, and a hydraulic chamber in which cutting earth and sand penetrated by the cutter intrude, between the rotary frame and an inner pipe fixed to a skin plate provided inside the rotary frame. In the water pressure chamber, a discharge pipe and a drain pipe into which pressure water flows are connected in an open manner, and the inner pipe is located on the tip side thereof, and is disposed on the outer peripheral surface of the segment of the shield method construction pipe at the time of pushing. Pressure welding so that it can slide freely In addition, a backfill pipe for preventing the intrusion of the above-mentioned cutting earth and sand, and for feeding the filler by the filling machine from the arrival shaft side is connected to the substrate portion of the base body by opening, and the erector fixed to the interior includes For one ring on the starting shaft side of the segment, a crushing part of the secondary lining and a grip part that can be locked to the segment hanging hand fitting are provided, and disassembly and removal of the one ring is possible. It is intended to provide a rehabilitation shield device for use in a rehabilitation method for a construction sewer constructed by a shield method.

Further, in the case of the third aspect, the following configuration is added to the contents of the rehabilitation method according to the first aspect. That is, during excavation by the rehabilitation shield device, when the external pressure propulsion generated by the filler injection pressure into the rear cavity portion or the water pressure or earth pressure of the ground is applied to the pushing by the propulsion jack, By pressing an overpropulsion prevention jack provided on the rehabilitation shield device against the end of the segment, the pushing speed of the rehabilitation shield device by the propulsion jack is controlled to a specified propulsion speed. This is the content of the addition.

In the rehabilitation shield device of the fourth aspect, in order to carry out the rehabilitation method of the third aspect, an overpropulsion prevention jack is fixed to the inner cylinder, and the ram is provided at the end of the segment. Claim 2 is that it is configured to be able to be pressed freely.
Of the rehabilitation shield device.

Further, according to a fifth aspect of the present invention, the rehabilitation shield device is operated from the start shaft of the shield construction method construction sewer, so that the propulsion jack pushes the rehabilitation shield device toward the reaching shaft and the rehabilitation shield device has a skin plate. The rotary cutter of the circumference is driven to rotate, the excavation of the outer ground of the segment in the shielded construction culvert is performed, and the resulting sediment is removed by the rotary frame of the rotary cutter and the inner pipe fixed inside the rotary frame. And the introduced cutting soil is muddy by the pressure water supplied to the hydraulic chamber and discharged from the arriving shaft through a drain pipe, and the above-described cutting soil is The segment seal provided on the inner pipe is resiliently contacted with the outer peripheral surface of the segment to prevent intrusion into the rehabilitation shield device. By sequentially pushing and propelling a ready-made pipe body of a size larger than the shield construction construction sewer described above, a reaction force is taken to the ready-made pipe body at the forefront so that the pushing by the propulsion jack is continued, After stopping the excavation when one ring of the segment is located near the starting shaft of the segment seal, the segment joint exposed by removing the secondary lining of the ring by the crushing part of the erector in the rehabilitation shield device. By removing the bolts and further disassembling and removing the segments by using the segment hanging metal fittings by the grip portion of the erector, by sequentially removing all the segments, the above-described propulsion method by the continuous connection of the ready-made pipe body. In order to provide a method of rehabilitating a construction sewer constructed by rehabilitating a constructed sewer, which is laid. To have.

In the case of claim 6, the same as claim 5
A base having a base cylinder portion in a rehabilitation shield device that can be used to carry out the rehabilitation method, and is slidably and deflectably fitted to the base cylinder portion, and can be pushed by a propulsion jack. A rotary cutter comprising a cylindrical skin plate, a rotary frame fitted on the inner periphery of the skin plate and driven to rotate by a cutter motor, and a cutter provided at a tip extending from the skin plate. A water pressure chamber into which cutting earth and sand from the cutter penetrate is formed between the rotary frame and an inner pipe fixed to the inside of the rotary frame, and a delivery pipe and a drain pipe through which pressure water flows into the water pressure chamber. The inner pipe is located at the tip end side of the inner pipe, and is slidably pressed against the outer peripheral surface of the segment of the shielded construction pipe at the time of the pushing, so that the intrusion of the above-mentioned cut soil can be prevented. And the interior was fixed The selector, per ring portion of the starting pit side of said segment, and a locking freely grip portion is provided in the crushing unit and the segment hanger bracket secondary Kutsugaegyo, the 1
It is possible to dismantle and remove the ring, and the substrate has
A shield method for rehabilitation of a construction sewer constructed with a connecting part for engaging a ready-made pipe first pushed in from the starting shaft side by a propulsion method. .

According to a seventh aspect of the present invention, in the same manner as the third aspect of the rehabilitation method of the fifth aspect, during the excavation by the rehabilitation shield device, the injection pressure of the filler into the rear cavity is reduced. Or external pressure propulsion generated by water pressure and earth pressure of the ground,
When the propulsion jack is weighted by pushing, the over-propulsion prevention jack provided on the rehabilitation shield device is pressed against the end of the segment, so that the propulsion jack pushes the rehabilitation shield device. Controlling the speed to the specified propulsion speed is an additional content.

According to an eighth aspect of the present invention, in order to carry out the rehabilitation method of the seventh aspect, an overpropulsion prevention jack is fixed to the inner cylinder with respect to the rehabilitation shield device of the sixth aspect. A point that is configured to be able to be pressed against the end of the ram segment is added.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention aims at achieving the above-mentioned object. First, a segment as an old shielded construction conduit according to claim 1 is replaced with a shielded construction conduit of a larger size. Prior to this, a rehabilitation shield device for rehabilitation according to claim 2 used for carrying out the rehabilitation method will be described in detail with reference to FIG. This rehabilitation shield device A1 is slidable on the base 1 comprising a radial substrate 1a and a longitudinal base 1b, and is capable of deflecting in the longitudinal direction by sliding on the base 1b. And a tubular skin plate 3 which is fitted and can be pushed by the propulsion jack 2. Here, in the illustrated example, the base cylinder portion 1b has a tapered tapered surface 1c on the outer periphery on the leading side,
Reference numeral 1d denotes a seal portion of the propulsion jack 2. The propulsion jack 2 has a cylinder 2a and a ram 2b pivotally mounted on the base plate 1 on the skin plate 3 side. When the skin plate 3 is pushed in the leading direction, which is the left direction in the figure, as is known, the pushing speed of these propulsion jacks 2 is adjusted by adjusting the pushing speed of these propulsion jacks 2. As described above, the deflection of the skin plate 3 is possible.

Further, a rotating frame 4b fitted on the inner peripheral side of the skin plate 3 and rotatably supported by a cutter motor 4a, and a cutter 4c formed of a required number of roller bits or the like are provided at the end thereof. The cutter 4c is disposed at a position extending from the front end of the skin plate 3 and 4d in the figure.
Reference numeral 4 denotes an outer peripheral cutter face plate, and reference numeral 4e denotes a transmission portion of the cutter motor 4a. A hydraulic chamber 6 is formed between the rotating frame 4b and the inner pipe 5 provided therein and fixed to the skin plate 3 and into which the earth and sand cut by the cutter 4c penetrate. An outlet pipe 6a of the pressure water W supplied from the outside is connected to the hydraulic chamber 6 through an opening 5a of the inner pipe 5, and an opening 5b of the mud drain pipe 6b is also connected to the hydraulic chamber 6 in the inner pipe 5. Communicating.

When the rehabilitation shield device A1 is pushed forward by the propulsion jack 2 at the distal end side of the inner pipe 5, a segment of the old shield construction construction sewer B buried in the ground. b, a segment seal 5c is formed so as to be able to freely deform and press against the outer peripheral surface of the cutter 4c to prevent the cutting soil J from entering the inside of the rehabilitation shield device A1. 5
d is fixed to the inner pipe 5, and its free edge 5e is in a normal state and is extended in a bent manner with a receding angle.

Next, at the time of use, the backfill pipe 7a for feeding the filler F such as mortar from the arrival shaft H2 side shown in FIG.
In this case, as shown in FIG. 1 (B), the filler F can be pumped to the rear cavity E which is excavated and opened behind the rehabilitation shield device A1. Has become. Further, an erector 8 is fixedly mounted inside the inner tube 5 similarly to the known shield excavator. As is well known, a grip portion 8a which can be locked to the segment hanging metal fitting b1 of the segment b is provided. In addition to the crushing portion 8b, a crushing portion 8b to be used prior to the grip portion 8a is provided. As the crushing portion 8b, a hydraulic breaker, a water jet cutter, or the like can be used.

In FIG. 1 (A), reference numeral 8c denotes the
8d shows an erector elevating jack. Therefore, by using the erector 8, the secondary covering of the segment b for one ring on the starting shaft H1 side shown in FIG. The segment joint bolt b3 can be removed by crushing and removing the work b2 by the crushing portion 8b, and the segment b is locked to the segment hanging metal fitting b1 by the grip portion 8a.
Is decomposed and removed. Here, FIG.
In the rehabilitation shield device A1 shown in FIG. 2A, the above-described propulsion jack 2 and the erector 8 are supplied from a hydraulic unit 10 mounted on a bogie 9 that runs in an old shield method-built sewer B near the arrival shaft H2. In the drawing, reference numeral 8e denotes an electric motor in the electric container 8, and an electric motor with a speed reducer is used as the cutter motor 4a.

Next, the rehabilitation method according to the first aspect, which can be performed by using the rehabilitation shield apparatus A1 according to the second aspect, will be described in detail with reference to FIG. By operating the rehabilitation shield device A from the shaft H1, the propulsion jack 2 causes the reaching shaft H to be reached.
2, the rotary cutter 4 provided on the inner periphery of the skin plate 3 of the rehabilitating shield device A is rotationally driven while being pushed toward the rehabilitation shield device A.
Excavates the outer peripheral ground G of the segment b in the direction of arrow D. Of course, at this time, if necessary, the skin plate 3 can be deflected with respect to the base 1 by adjusting the extruding degree of the plurality of propulsion jacks 2 provided as described above.

The earth and sand J cut by the cutter 4c of the rotary cutter 4 provided at a position extended from the skin plate 3 is fixed to the rotary frame 4b of the rotary cutter 4 inside the rotary frame 4b. The introduced cutting soil J is introduced into the hydraulic chamber 6 formed separately from the inner pipe 5, and the introduced cutting soil J is muddy by the pressurized water W supplied to the hydraulic chamber 6 to be muddy.
It is discharged from the arrival shaft H2 side through b. At the time of the above-mentioned discharge, the cutting soil J is applied to the above-mentioned segment b by the segment seal 5c provided on the inner pipe 5.
By resiliently contacting the outer peripheral surface of the segment b, more precisely, the outer peripheral surface of the primary lining b4 of the segment b, it does not enter the rehabilitation shield device A1.

More importantly, when excavating the rehabilitation shield device A1 as described above, the reaching shaft H2 must be set in advance.
The filler F is supplied from the filling machine 7 into the rear cavity E on the starting shaft H1 side to form a backfill portion K formed by curing the filler F, and the backfill portion K is formed in the backfill portion K. This is to continue pushing by the propulsion jack 2 by taking a reaction force.

Thus, as clearly shown in FIG. 1A, one ring of the segment b, which is closest to the starting shaft H1, has reached a position where it has entered the rehabilitation shield device A1 beyond the segment seal 5c. Then, after stopping the excavation, by operating the above-mentioned erector 8 of the rehabilitation shield device A1, the crushing portion 8b firstly activates the secondary lining b2 for one ring of the segment b. The segment b is removed by crushing, the segment joint bolt b3 exposed by this is removed by appropriate means, and the segment b is disassembled and removed using the segment hanging metal fitting b1 by operating the grip portion of the erector 8. Thus, all the segments b are sequentially removed. In this invention, after the backfilling section K described above is continuously connected from the start shaft H1 side to the arrival shaft H2 side, or without waiting for the completion of the connection, the present invention provides the backfilling section K, By using a shield excavator (not shown) having a size larger than that of the removed shield method construction pipe B, the shield method rehabilitation construction pipe L is laid.

Next, a rehabilitation method according to claim 3 will be described. Prior to this, a rehabilitation shield device according to claim 4 which can be used for the method will be described in detail with reference to FIG. I do. The rehabilitation shield device A1 here is
It differs from the configuration of the second aspect in that an overpropulsion prevention jack 11 is appropriately added as described below. That is, in the rehabilitation shield device A1, in the illustrated example, the cylinder 11a of the overpropulsion prevention jack 11 is attached to the skin plate 3.
The ram 1b has an additional feature in that the ram 1b can be pressed against the end b5 of the segment b as one ring in the shielded construction culvert B as described above. are doing.

As will be understood from the above description, the technical contents of claim 3 differ from the rehabilitation method of claim 1 only in the following additional method contents. According to the rehabilitation method detailed in claim 1, during the excavation as previously described by the rehabilitation shield device A1, the filler F is injected into the rear cavity E as described above. In such a case, when the injection pressure at the time or the external pressure propulsion M which is caused by the earth pressure or the water pressure in the ground is applied, it is intended to appropriately cope with this. . That is, when the external pressure propulsion force M is applied to the pushing of the skin plate 3 by the propulsion jack 2 described above, the overpropulsion prevention jack 1 in the rehabilitation shield device A1 is used.
1 is pressed against the end b5 of the segment b to control the pushing speed of the rehabilitation shield device A1 by the propulsion jack 2 to a specified propulsion speed that is not higher than a desired speed. Even in such a case, there is no possibility that an excessive external force is applied to the rotary cutter 4 to cause a damage or breakage accident, or that the ground cutting by the cutter 4c strongly pressed on the outer peripheral ground G becomes impossible. To do so.

Next, a rehabilitation method according to a fifth aspect will be described. The rehabilitation method has the same configuration as the rehabilitation method of the first aspect, and the difference between the two rehabilitation methods is as follows. This is the point. For the common contents, the description of claim 1 is referred to, and the duplicate description is omitted here. That is, in the case of claim 5, the reaction force is applied to the backfill portion K in the case of claim 1 and the pushing by the propulsion jack 2 is continued, but the reaction force is applied as understood from FIG. As shown in FIG. 2, the target object is not the backfilling portion K, but the propulsion method sequentially pushes and pushes the ready-made pipe body N having a size larger than that of the above-mentioned shield method construction culvert from the start shaft H1 side as shown in FIG. A reaction force is applied to the ready-made tube body N1 at the tip, and thus the pushing by the propulsion jack 2 is continued. Therefore, when the rehabilitation method is used, compared to the case of the first aspect, the old pipes N, N1 ‥‥‥ are propelled one after another without using a shield excavator, so that the old shield method constructed sewer B can be used.
The rehabilitation sewer P, which is a new method of sewerage, etc., which is a new sewage system, can be completed, and the construction period can be further shortened. Here, as shown in FIG.
As ‥‥‥, a reinforced concrete pipe or a ductile cast pipe can be used, and Q indicates a hydraulic jack for propulsion.

FIG. 2 illustrates a rehabilitation shield device A2 according to claim 6 which can be used to carry out the rehabilitation method according to claim 5, and its basic configuration is shown in FIG. This is the same as the rehabilitation shield device A1 in the second aspect, except that the backfill pipe 7a provided in the second aspect is absent as described above.

The rehabilitation method according to the seventh aspect will be described. The rehabilitation method according to the fifth aspect is further provided with a technical content in which the already-explained overpropulsion prevention jack 11 is used. Since the technical content itself has already been described in claim 3, the detailed description is omitted here. However, at this time, the injection pressure of the filler is not added as the external pressure driving force M. . Further, the rehabilitation shield device A2 according to claim 8 is the above reclaiming shield device A2.
The rehabilitation method of the present invention is related to the rehabilitation shield device A2 described in claim 6 and is similar to the technical content specified in the description of claim 4. Cylinder 11a of jack 11
And the ram 11b, respectively, the inner tube 5 and the end b of the segment b.
A configuration is provided in which it can be pinched freely between the five.

[0034]

According to the present invention, as described above, according to the first aspect, the cutting soil excavated by the rotary cutter using the rehabilitation shield device can be efficiently compressed. Muddy water is used to make the muddy water, and the muddy water is discharged through a mud pipe, so that a mechanically quick operation can be performed. In addition, the workability is improved without unnecessary pauses by pumping the filler into the rear cavity and taking a reaction force to the backfill part formed and digging the rehabilitation shield device one after another with the propulsion jack. Can be. Furthermore, by using a known erector with an additional crushing section, it is possible to quickly and easily disassemble and remove the secondary lining from a nearby segment by mechanical force. And the backfill part is larger in size than the old water pipe, etc., so it is possible to easily replace the segment with the shielded construction method, which is desirable here. Can be satisfied.

Next, in a second aspect of the present invention, with regard to the configuration of the above-mentioned rehabilitation shield device, a substrate portion which takes a reaction force to the backfill portion;
A skin plate pushed by a propulsion jack, a rotary cutter inside this, a delivery pipe and a drain pipe communicating with the hydraulic chamber between the inner pipe and the rotary cutter, a backfill pipe for delivering filler to the rear cavity, The rehabilitation method according to claim 1 is quickly and safely implemented by the provision of a segment seal provided on the inner pipe for preventing the intrusion of the intended cutting earth and sand, and a grip portion and a crushing portion provided on the erector. It is possible to do.

According to a third aspect of the present invention, in addition to the technical content of the first aspect, an over-propulsion prevention jack is provided at an appropriate location, and the rehabilitation shield device is provided by filling pressure, earth pressure of the ground, and water pressure. When the weight is applied to the pushing by the propulsion jack, the pushing force based on the result of the pushing is suppressed, and the pushing condition of the normal desirable rehabilitation shield device is secured, which enables the smooth rotary type. Excavation by the cutter is corrected, and occurrence of member damage can be avoided.

According to a fourth aspect of the present invention, the cylinder and the ram of the jack for preventing excessive propulsion can be laid between appropriate positions so that the rehabilitation method of the third aspect can be completely implemented. With the configuration, the above object can be achieved by an easy operation.

Further, in claim 5 and thereafter, instead of obtaining the reaction force in the backfill portion as described above, the ready-made pipes are pushed one after another from the starting shaft side by the propulsion method, and the reaction force is applied to the ready-made pipes. Therefore, it is possible to quickly lay a rehabilitation construction sewer with a larger size than the old sewer. According to a sixth aspect of the present invention, it is possible to provide a rehabilitation shield device capable of reliably performing the rehabilitation method of the fifth aspect by appropriately arranging the overpropulsion prevention jack. In addition to seeking the reaction force of the ready-made pipe body as described above, by operating the overpropulsion prevention jack in a timely manner, the above-mentioned adverse effects due to the external pressure propulsion by the overpropulsion prevention jack are suppressed beforehand to guarantee normal excavation. It becomes possible. According to claim 8, it is possible to provide a rehabilitating shield method constructed sewer which can completely exhibit the above-mentioned effect according to claim 7.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional side view in a use state showing a rehabilitation shield device according to claims 2 and 4, and FIG.
FIG. 4 is a vertical sectional side view of a work site showing an execution state of a rehabilitation method according to claims 1 and 3.

FIG. 2A is a longitudinal sectional side view in a use state showing the rehabilitation shield device according to claims 6 and 8, and FIG.
FIG. 7 is a schematic vertical sectional side view of a work site showing an implementation state of a rehabilitation method according to claims 5 and 7.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 1a Substrate part 1b Base cylinder part 2 Propulsion jack 3 Skin plate 4 Rotary cutter 4a Cutter motor 4b Rotating frame 4c Cutter 5 Inner pipe 5c Segment seal 6 Hydraulic chamber 6a Delivery pipe 6b Drainage pipe 7 Filling machine 7a Backfill pipe Reference Signs List 8 Electa 8a Grip portion 8b Crushing portion 11 Overpropulsion prevention jack 11a Cylinder 11b Ram A1 Rehabilitation shield device A2 Rehabilitation shield device B Shield method construction conduit E Back cavity F Filler G Outer ground H1 Starter shaft H2 Starter shaft J Cutting sediment K Backfilling part L Shield method rehabilitation construction culvert M External pressure propulsion N Prefabricated pipe N1 State-of-the-art prefabricated pipe P Propulsion construction rehabilitation culvert W Pressure water b segment b1 segment hanging hand b2 secondary lining b3 Segment joint bolt b5 End of segment

Claims (8)

[Claims] 1. A rehabilitation shield device is operated from a starting shaft of a construction method constructed by a shield method, so that the propulsion jack pushes the rehabilitation shield device toward a reaching shaft, and a rotary type of an inner periphery of a skin plate of the rehabilitation shield device. By rotating the cutter, excavating the outer ground of the segment in the shield construction construction sewer, cutting earth and sand by this between the rotating frame of the rotary cutter and the inner pipe fixed inside it Introduced into the separated hydraulic chamber, the introduced cutting soil is muddy by the pressure water supplied to the hydraulic chamber and discharged from the arriving shaft side through a drain pipe, and the above-mentioned cutting soil is removed from the inner pipe. The segment seal provided in the above is resiliently contacted with the outer peripheral surface of the above-mentioned segment, thereby preventing intrusion into the rehabilitation shield device. By supplying a back cavity portion on the starting shaft side in the shield device to form a backfill portion, a reaction force is applied to the backfill portion so that the pushing by the propulsion jack is continued, and 1
After stopping the excavation when the ring component is located near the starting shaft of the segment seal, remove the secondary lining of the ring by the crushing part of the erector in the rehabilitation shield device, remove the exposed segment joint bolt, By disassembling and removing the segment by using the segment hanging metal fitting by the grip part of the erector, by sequentially removing all the segments, the back-filling part is continuously connected from the starting shaft side to the reaching shaft side. Or before the completion of the continuous construction, the backfilling section was to be laid with a shield method rehabilitation construction sewer using a shield excavator larger in size than the removed shield method construction sewer. A method of rehabilitating a construction sewer constructed by a shield method. 2. A base body comprising a substrate part and a base cylinder part, a cylindrical skin plate slidably fitted to the base cylinder part so as to be capable of turning and being pushed by a propulsion jack, A rotary frame fitted with an inner periphery of the skin plate and driven to rotate by a cutter motor, a rotary cutter including a cutter provided at a tip extending from the skin plate; Between the inner pipe fixed to the skin plate in which it is installed, a hydraulic chamber into which the cutting soil by the cutter penetrates is formed separately, and a delivery pipe and a mud pipe into which the pressurized water flows into the hydraulic chamber. An opening is continuously provided, and the inner pipe is located at the tip side thereof, and is slidably pressed against the outer peripheral surface of the segment of the shield method constructed sewer at the time of pushing, so that the intrusion of the above-mentioned cut soil can be prevented. ,
A backfill pipe for pressure-feeding the filler by the filling machine from the reaching shaft side is connected to the base of the base by an opening, and the erector fixed inside is provided with two bucks per ring on the starting shaft side of the segment. A crushing part for the next lining and a grip part that can be locked to the segment hanging hand fitting are provided, and the ring can be dismantled and removed for one ring. Rehabilitation shield device. 3. The rehabilitation shield device is operated from the starting shaft of the shield construction method construction sewer, and is pushed toward the reaching shaft by the propulsion jack. By rotating the cutter, excavating the outer ground of the segment in the shield construction construction sewer, cutting earth and sand by this between the rotating frame of the rotary cutter and the inner pipe fixed inside it Introduced into the separated hydraulic chamber, the introduced cutting soil is muddy by the pressure water supplied to the hydraulic chamber and discharged from the arriving shaft side through a drain pipe, and the above-mentioned cutting soil is removed from the inner pipe. The segment seal provided in the above is resiliently contacted with the outer peripheral surface of the above-mentioned segment, thereby preventing intrusion into the rehabilitation shield device. By supplying to the rear cavity portion on the starting shaft side in the shield device to form the backfill portion, a reaction force is applied to the backfill portion so that the pushing of the propulsion jack is continued, and After stopping the excavation when one ring is located near the starting shaft of the segment seal, the crushing part of the erector in the rehabilitation shield device removes the secondary lining of the ring and removes the exposed segment joint bolt. Further, by disassembling and removing the segment using the segment hanging metal fitting by the grip portion of the erector, by sequentially removing all the segments, the back-filling portion is moved from the starting shaft side to the reaching shaft side. It is installed continuously or before the completion of the installation, and during the excavation by the rehabilitation shield device described above, the above-mentioned rear cavity is filled. When external pressure propulsion generated by injection pressure or ground water pressure or earth pressure is applied to the pushing by the above-mentioned propulsion jack, an overpropulsion prevention jack provided on the rehabilitation shield device is pushed to the end of the segment. By pushing, the pushing speed of the rehabilitation shield device by the propulsion jack is controlled to the specified propulsion speed, and the above-mentioned continuous backfill part has a shield of a size larger than the removed shield construction construction sewer. A method of rehabilitating a shield-constructed sewer, wherein an excavator is used to lay a shield-reconstructed sewer. 4. A base body comprising a substrate part and a base cylinder part, a cylindrical skin plate which is slidably fitted to the base cylinder part so as to be able to change direction, and which can be pushed by a propulsion jack. A rotary frame fitted with an inner periphery of the skin plate and driven to rotate by a cutter motor, a rotary cutter including a cutter provided at a tip extending from the skin plate; A hydraulic chamber into which cutting earth and sand intruded by the cutter penetrates is formed between the inner pipe fixed to the skin plate and the inner pipe, and a delivery pipe and a mud pipe through which pressurized water flows are formed in the hydraulic chamber. An opening is continuously provided, and the inner pipe is located at the tip end side, and is slidably pressed against the outer peripheral surface of the segment of the shield construction culvert at the time of the pushing, so that intrusion of the above-mentioned cutting soil can be prevented, For filling machines from the arrival shaft side A backfill pipe for pressure-feeding the filling material is connected to the base of the base body by opening, and the erector fixed to the interior is provided with a crushing part of the secondary lining for one ring on the starting shaft side of the segment. By providing a grip portion that can be locked to the segment hanging hand fitting, it is possible to disassemble and remove one ring, and a cylinder of an overpropulsion preventing jack is fixed to the inner pipe, and the ram is provided. A rehabilitation shield device used in a rehabilitation method for a construction sewer, wherein the rehabilitation method is capable of pressing against an end of a segment. 5. The rehabilitation shield device is operated from the starting shaft of the shield construction construction sewer, and is pushed toward the reaching shaft by the propulsion jack, and the rotary type of the inner periphery of the skin plate of the rehabilitation shield device is used. By rotating the cutter, excavating the outer ground of the segment in the shield construction construction sewer, cutting earth and sand by this between the rotating frame of the rotary cutter and the inner pipe fixed inside it Introduced into the separated hydraulic chamber, the introduced cutting soil is muddy by the pressure water supplied to the hydraulic chamber and discharged from the arriving shaft side through a drain pipe, and the above-mentioned cutting soil is removed from the inner pipe. The segment seal provided on the outer surface of the segment is resiliently contacted with the outer peripheral surface of the segment to prevent entry into the rehabilitation shield device. By sequentially pushing and propelling a ready-made pipe having a size larger than that of the construction method, a reaction force is applied to the ready-made pipe at the forefront to continue the pushing by the propulsion jack. After stopping the excavation where the ring component is located near the starting shaft of the segment seal, by the crushing part of the erector in the rehabilitation shield device, remove the secondary lining of the ring and remove the exposed segment joint bolt, Further, the segment is dismantled and removed by using the segment hanging metal fitting by the grip portion of the erector, and all the segments are sequentially removed, so that the propulsion method rehabilitation and construction culvert by the continuous connection of the above-described ready-made tube body. A method of rehabilitating a construction sewer constructed by a shield method, characterized by being laid. 6. A base body having a base cylinder portion, a cylindrical skin plate which is slidably and deflectably fitted to the base cylinder portion and which can be pushed by a propulsion jack, and A rotary frame fitted on the inner periphery of the rotary frame and driven to rotate by a cutter motor; a rotary cutter having a cutter provided at a tip extending from the skin plate; A water pressure chamber into which cutting soil and sand from the cutter penetrate is formed between the inner pipe and the inner pipe, and a delivery pipe through which pressurized water flows and an exhaust pipe are connected to the water pressure chamber. At the end of the pipe, at the time of pushing, it is slidably pressed against the outer peripheral surface of the segment of the shield method constructed sewer, so that the intrusion of the above-mentioned cutting soil can be prevented, Starting shaft side of the segment For one ring, a crushing part of the secondary lining and a grip part that can be locked to the segment hanging hand fitting are provided, and the disassembly and removal of the one ring can be performed. A rehabilitation shield device for use in a rehabilitation method of a construction sewer constructed by a connecting method for engaging a prefabricated pipe body first pushed in by a propulsion method. 7. The rehabilitation shield device is operated from the starting shaft of the shield method construction sewer, the propulsion jack pushes the rehabilitation shield device toward the reaching shaft, and the rotary shaft on the inner periphery of the skin plate of the rehabilitation shield device. By rotating the cutter, excavating the outer ground of the segment in the shield construction construction sewer, cutting earth and sand by this between the rotating frame of the rotary cutter and the inner pipe fixed inside it Introduced into the separated hydraulic chamber, the introduced cutting soil is muddy by the pressure water supplied to the hydraulic chamber and discharged from the arriving shaft side through a drain pipe, and the above-mentioned cutting soil is removed from the inner pipe. The segment seal provided on the outer surface of the segment is resiliently contacted with the outer peripheral surface of the segment to prevent entry into the rehabilitation shield device. By sequentially pushing and propelling a ready-made pipe having a size larger than that of the construction method, a reaction force is applied to the ready-made pipe at the forefront to continue the pushing by the propulsion jack. After stopping the excavation where the ring component is located near the starting shaft of the segment seal, by the crushing part of the erector in the rehabilitation shield device, remove the secondary lining of the ring and remove the exposed segment joint bolt, Further, the segment is dismantled and removed by using the segment hanging metal fitting by the grip portion of the erector, and all the segments are sequentially removed, so that the propulsion method rehabilitation and construction culvert by the continuous connection of the above-described ready-made tube body. During the excavation by the above-mentioned rehabilitation shield device, the external pressure generated by ground water pressure and earth pressure When the advance force is weighted by the pushing by the propulsion jack, the pushing speed of the rehabilitation shield device by the overpropulsion jack provided in the rehabilitation shield device is controlled to the specified propulsion speed. A method of rehabilitating a construction sewer with a shield method. 8. A base body having a base cylinder portion, a cylindrical skin plate which is slidably and deflectably fitted to the base cylinder portion and can be pushed by a propulsion jack, and A rotary frame having a rotary frame rotatably driven by a cutter motor fitted to the inner periphery of the rotary frame; a rotary cutter provided at a tip extending from a skin plate of the rotary frame; A water pressure chamber into which cutting soil and sand from the cutter penetrate is formed between the inner pipe and the inner pipe, and a delivery pipe through which pressurized water flows and an exhaust pipe are connected to the water pressure chamber. At the end of the pipe, at the time of pushing, it is slidably pressed against the outer peripheral surface of the segment of the shield method constructed sewer, so that the intrusion of the above-mentioned cutting soil can be prevented, Starting shaft side of the segment For one ring, a crushing part of the secondary lining and a grip part that can be locked to the segment hanging hand fitting are provided, and the disassembly and removal of the one ring can be performed. A connecting portion is formed to engage a ready-made tube first pushed in by the propulsion method, and a cylinder of an overpropulsion preventing jack is fixed to the inner tube, and its ram is pressed against the end of the segment. A rehabilitation shield device used in a rehabilitation method for a construction sewer constructed by a shield method characterized by being flexible.