JP5280699B2 - Existing pipe repair method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To implement repairing operation so that a pipe to be repaired is made approximately concentric with an existing pipe, in an existing pipe repairing method including a repairing pipe forming step for forming a repaired pipe inside an existing pipe by inserting a new pipe piece into the repairing target existing pipe while sequentially joining the new pipe pieces to the existing pipe and a filling step for filling a temporally sclerogenic filler into a portion between the repaired pipe and the existing pipe. <P>SOLUTION: In the repairing pipe forming step, a leading device 1 for holding a lead-off pipe 4 concentric with the existing pipe 100 is arranged in front of the lead-off pipe 4 joined to an anterior part of an insertion direction of a first new pipe piece 8-1. Then, the leading device is allowed to move inside the existing pipe in synchronization with an inserting operation of the new pipe piece. In the filling step, the filler is filled in a portion between the new pipe piece under an insertion operation into the existing pipe and the existing pipe. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an existing pipe repair method for forming a rehabilitation pipe in an existing pipe such as a sewer pipe or a mounting pipe, and rehabilitating the existing pipe.

  The average sewerage penetration rate in Japan is 68%, which is almost 100% in urban areas. Under such circumstances, new sewage pipes are almost eliminated except in some areas, and the maintenance of existing sewage pipes is important. The total length of existing sewage pipes is about 360,000 km, of which sewage pipes with a useful life of more than 50 years are over 7000 km. In the future, it is expected to increase by several thousand kilometers.

  In general, existing pipes buried in the ground such as sewer pipes are inevitably subject to various deformations due to the lapse of years since installation, for example, generation of steps due to displacement or change in diameter. In addition, even if no deformation occurs, replacement is necessary with aging. Under such various circumstances, the aging existing pipe needs to be replaced with a new pipe or to be repaired in some decades after being buried.

  As a method for repairing an existing pipe, for example, as disclosed in JP-A-7-91567 (Patent Document 1) and JP-A-2003-301690 (Patent Document 2), a new pipe piece manufactured in advance is used. Insert the existing pipe into the existing pipe while sequentially adding it, and provide a rehabilitation pipe in the existing pipe.In addition, a time-hardening filler is injected into the gap provided between the existing pipe and the rehabilitation pipe and cured. An existing pipe repairing method has been proposed in which the function of the existing pipe is restored by integrating the above.

JP 7-91567 A JP 2003-301690 A

  According to the above-described conventional existing pipe repairing method, the existing pipe and the rehabilitated pipe are integrated and lowered by injecting and curing the time-curable filler into the gap between the existing pipe and the rehabilitated pipe as described above. The function of the existing pipe can be restored.

  By the way, the existing pipe inherently has not only a linearly extending part but also a gently bent part, and the seam part due to changes in the ground over a long period of time. May be bent or have a step. Also, existing pipes may be buckled for many years.

  When inserting a new pipe piece to form a rehabilitated pipe in the existing pipe, especially the leading new pipe piece comes into contact with the existing pipe at the bent portion of the existing pipe, or at the stepped part or the buckled part. Since it hits, smooth insertion may be inhibited.

  An object of the present invention is to enable smooth insertion of a new pipe piece into an existing pipe even when a bent part, a stepped part, a buckled part, or the like is generated in the existing pipe.

In order to achieve the above-described object, the existing pipe repair method according to claim 1 is a rehabilitation pipe forming method in which a renovated pipe is formed in the existing pipe by sequentially inserting new pipe pieces into the existing pipe to be repaired. In a method including a step and a filler filling step of filling a time-curable filler between the rehabilitated tube and the existing tube,
The rehabilitation pipe formation process
A leading device for maintaining the leading tube substantially concentrically with the existing tube is arranged in front of the leading tube connected to the front portion of the leading tube in the insertion direction, and the leading device is inserted into the new tube piece. Move in the existing pipes synchronously with the movement,
The filler filling step
It is carried out by injecting the filler between the new pipe piece being inserted into the existing pipe and the existing pipe.

  According to this configuration, the leading end of the leading pipe in the insertion direction and the existing pipe are always maintained at a constant distance by the action of the leading device, so that the leading pipe is moved during its insertion operation. The leading edge of the insertion direction is smoothly advanced without contacting the inner peripheral surface or the stepped portion of the existing pipe. Therefore, the new pipe piece can be smoothly inserted into the existing pipe by the leading of the leading pipe thus advanced. Is achieved. And since a filler is inject | poured with formation of a rehabilitation pipe | tube, the renovation of an existing pipe | tube can be performed efficiently and rapidly.

The existing pipe repair method according to claim 2 is:
Before the start of the rehabilitation pipe forming step, the entire circumference of one end edge of the cylindrical membrane having the length and flexibility of the existing pipe is in close contact with the whole circumference of the edge of the opening on the one end side of the existing pipe A cylindrical membrane fixing step for fixing is performed, and the rehabilitation tube forming step is to feed the new tube piece to the outer peripheral side of the leading tube by inverting the cylindrical membrane at the leading edge of the leading tube in the insertion direction. Including insertion into the existing pipe.

  According to this configuration, the space between the front end edge of the leading pipe in the insertion direction and the existing pipe is always maintained at a constant interval by the action of the leading device. When reversing at the leading end edge in the insertion direction, it is always sent to the outer peripheral side of the top tube in a preferable state without contacting the inner peripheral surface of the existing tube and therefore without being damaged by abrasion.

  In this way, the cylindrical membrane charged into the existing pipe does not leak from the cracked portion or the joint portion of the existing pipe when the filler is injected into the gap between the cylindrical membrane and the rehabilitation pipe. Act on. In addition, when the existing pipe after rehabilitation is deformed, cracked, stepped, etc. due to a ground deformation such as an earthquake, the cylindrical film can cover and cover gaps, etc. generated by these deformed, cracked, stepped, etc. It is possible to secure an emergency seal until repair is performed.

The existing pipe repair method according to claim 3 is:
The filler filling step is performed by injecting the filler between the new pipe piece being inserted into the existing pipe and the cylindrical membrane.

  According to this configuration, since the charging of the cylindrical membrane and the injection of the filler are performed in parallel with the formation of the rehabilitating tube, the existing tube is renewed efficiently and quickly when the cylindrical membrane is charged. be able to.

The existing pipe repair method according to claim 4 is:
The leading edge of the leading pipe in the insertion direction has a smooth outer surface shape.

  According to this configuration, the cylindrical film can be smoothly reversed without being damaged by the tip end portion having a smooth outer surface shape.

The existing pipe repair method according to claim 5 is:
The filling material is injected from a nozzle provided in the vicinity of the leading edge of the leading pipe in the inserting direction during the inserting operation of the new pipe piece.

  According to this configuration, during the operation of inserting the new pipe piece, the filler can be easily injected from the nozzle into the gap formed between the existing pipe and the top pipe or between the cylindrical membrane and the top pipe. In addition, since the filling material is directly injected into the gap, the filling material can be surely spread evenly over the gap.

  In addition, since the space between the leading pipe and the existing pipe is always maintained at a constant interval, it is injected into the gap between the leading pipe and the existing pipe, or the gap formed between the cylindrical film and the leading pipe. The filler forms a uniform thickness filler layer around the leading tube, and thus a uniform thickness filler layer around the rehabilitated tube that is formed, resulting in additional The existing pipes after birth are given uniform strength as a whole.

The existing pipe repair method according to claim 6 is:
The leading device is fitted into the front portion of the leading pipe, and traveling means that enables traveling in synchronism with the insertion operation of the new pipe piece, and the leading pipe is concentric with the existing pipe. It has the support part supported from this, It is characterized by the above-mentioned.

  According to this configuration, the inside of the existing pipe can be easily moved while holding the leading pipe concentrically with respect to the existing pipe.

The existing pipe repair method according to claim 7 is:
A plurality of wheels provided around the leading device so that the traveling means travels while maintaining the leading device concentrically with respect to the existing pipe, and the leading device in the direction of inserting the new pipe piece. And a tow rope for towing.

  According to this configuration, the synchronous movement between the new pipe piece and the leading device can be easily performed by pulling the traction rope in accordance with the insertion operation of the new pipe piece.

The existing pipe repair method according to claim 8 is:
The support portion of the leading device is the thickness of the cylindrical membrane or slightly smaller than the inner peripheral surface near the leading edge of the leading tube in the insertion direction, and the cylindrical membrane is in the insertion direction. It is an annular seal portion that is opposed to each other with a gap that can pass through without being damaged when pulled in the direction of the distal end edge portion.

  During the insertion operation of the new pipe piece, the filler is injected between the leading pipe and the cylindrical film introduced to the outer peripheral side of the new pipe piece. It reaches the edge. The filler that has reached the leading edge of the insertion direction is prevented from leaking to some extent by the cylindrical film being in sliding contact with the leading edge of the insertion direction with a certain degree of contact pressure. However, since the filler is in a pressurized state, depending on the magnitude of the contact pressure of the cylindrical membrane with respect to the edge in the insertion direction, the pressure of the filler is superior, and the filler leaks between the two. There is also.

  According to the configuration of the eighth aspect, the gap between the inner peripheral surface in the vicinity of the leading edge of the leading tube in the insertion direction and the annular seal portion of the leading device is completely sealed by the cylindrical film. Thus, leakage of the filler can be sufficiently prevented.

The existing pipe repair method according to claim 9 is:
The annular seal portion is arranged in series in the circumferential direction of the annular seal portion, and presses the cylindrical membrane toward the inner peripheral surface near the tip edge portion in the insertion direction of the new tube piece. And a plurality of elastic rotating rollers that are rotatably supported by the leading device so as to be fed in the direction of the leading end edge in the insertion direction.

  According to this configuration, the elastic rotating roller presses the cylindrical film against the inner peripheral surface, so that the leakage of the filler from between the inner peripheral surface and the cylindrical film is reliably prevented. At the same time, the rotating action of the rotating roller allows the cylindrical film to move smoothly through the gap between the inner peripheral surface and the rotating roller.

The existing pipe repair method according to claim 10 is:
The annular seal portion is a ring material having an outer peripheral surface having a small friction coefficient with respect to the cylindrical film.

  According to this configuration, the cylindrical film is brought into intimate contact with the inner peripheral surface over the entire periphery by the outer peripheral surface of the ring material, and thereby the filler material between the inner peripheral surface and the cylindrical film is removed. Leakage is prevented, and the cylindrical membrane can slide smoothly with respect to the outer peripheral surface of the ring material.

The existing pipe repair method according to claim 11 is:
The cylindrical membrane is drawn from a cylindrical membrane supply device disposed in the leading tube or the inserted new tube piece, and is guided to a leading edge portion in the inserting direction of the leading tube.

  According to this configuration, the cylindrical membrane that is relatively easily damaged is damaged during the feeding movement between the cylindrical membrane supply device as the supply source and the leading edge of the leading tube in the insertion direction. Since it does not come into contact with any given member and is not subjected to deformation such as bending, it is fed into the space between the outer periphery of the new pipe piece and the existing pipe in a perfect state that can fully perform its function. The preparation for the installation of the cylindrical membrane is completed simply by installing the cylindrical membrane supply device in the leading tube or the new tube piece to be inserted. The state in which the cylindrical membrane can be pulled out is, for example, a state in which the cylindrical membrane is accommodated in the storage container so that it can be pulled out in a folded state or a rolled state.

The existing pipe repair method according to claim 12 is:
In the cylindrical membrane, the supply device is arranged inside or outside the arrival-side manhole on the front side in the new tube piece insertion direction, and passes from the supply device through an existing pipe that has not been repaired. And is guided from the rear side in the traveling direction of the leading device to the leading edge in the insertion direction of the leading pipe.

  According to this configuration, the cylindrical membrane can be fed to the leading edge of the leading tube in the insertion direction without being affected by the new tube piece inserted into the existing tube. This configuration is particularly advantageous when the existing pipe has a small diameter and the cylindrical membrane supply device cannot be placed in the new pipe piece.

The existing pipe repair method according to claim 13 is:
Instead of the leading pipe, the leading edge is a smooth reversal surface for the cylindrical membrane, and the filler injection nozzle is provided in the vicinity of the leading edge. It is characterized by using a first new tube piece whose end is connectable to a rearward new tube piece.

  When using the leading pipe, the leading pipe will eventually be pushed into the reaching side manhole, but in the case of a cylindrical membrane, the leading pipe falls into the reaching side manhole. And the support in the normal state of a cylindrical film | membrane will be impaired. Therefore, the length of the leading pipe connected to the existing pipe is connected to the existing manhole so that the cylindrical membrane is optimally arranged around the first new pipe piece inserted to the final position. A pseudo tube with a size somewhat longer than that is attached, and the leading tube is fed into the pseudo tube. Thereby, the cylindrical membrane is extended to the tip of the first new tube piece by the leading tube fed into the pseudo tube, and is arranged in a preferred form around the first new tube piece. At that time, the filler is also injected in a necessary range between the top tube in the pseudo tube and the cylindrical membrane. After the filler is solidified, a pipe opening process is performed at the position of the tip of the first new pipe piece, and by this process, the pseudo pipe is separated from the existing pipe together with the leading pipe inside, and taken out from the reaching side manhole.

  According to the structure of claim 13, when the first new pipe piece that plays the role of the leading pipe reaches the reaching side manhole, the cylindrical membrane laying work is completed in a sufficient form together with the rehabilitation pipe forming work, Therefore, it is not necessary to further perform the process of attaching the pseudo tube as described above. If the arrival-side manhole is in a situation where it is difficult to attach the pseudo tube, or if it is inappropriate to perform the work with the pseudo tube attached, use the first new pipe piece as the top tube. Is very advantageous.

  According to the existing pipe repair method according to the present invention, the renovated pipe can be rehabilitated by efficiently forming a rehabilitated pipe inside the existing pipe in a state where a filler having a substantially uniform thickness is injected between the two, In addition, when laying a cylindrical membrane between an existing pipe and a rehabilitation pipe, it is possible to smoothly and efficiently insert the cylindrical film between the existing pipe and the rehabilitation pipe in a good state without damage. It is possible to repair existing pipes as expected.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As a repair target of the existing pipe repair method according to the present embodiment, a sewerage facility having a general configuration shown in FIG. 9 will be described as an example.

  As shown in FIG. 9, a sewer main 100 as an existing pipe is disposed between manholes 101 and 102 installed at a predetermined interval. As shown in the figure, the aging sewer main 100 has cracks 110, cracks 111, detached portions 112, and the like. In the following description, the manhole 101 is the start side manhole, and the manhole 102 is the arrival side manhole. In the figure, reference numeral 103 denotes an attachment pipe extending from the collection tank to the sewer main.

  As will be described in detail below, in order to repair such an aged sewer main 100, new pipe pieces are sequentially inserted and inserted from the start side manhole 101 into the sewer main 100, and this insertion is connected to the arrival side manhole. A rehabilitation pipe is formed in the sewer main pipe 100 until it reaches 102.

  A cylindrical membrane is inserted into the gap between the sewer main pipe 100 and the rehabilitation pipe formed therein.

  In 1st Embodiment shown in FIGS. 1-7, as above-mentioned, a cylindrical membrane is inserted into the gap | interval between the sewer main pipe 100 and the renovation pipe | tube formed in the inside, This cylindrical membrane However, the present invention also includes a method of forming the rehabilitation pipe in the sewer main pipe 100 without charging the cylindrical membrane. .

  The new pipe piece has a predetermined length, for example, a fume pipe, a synthetic resin pipe (for example, a PE pipe, a PB pipe, a polyvinyl chloride pipe), a ceramic pipe, a steel pipe, or the like. The new pipe piece is formed with a connecting portion for connecting the new pipe pieces to each other at the front end portion and the rear end portion. For example, a socket part is provided at the front end part of the new pipe piece, and a plug part to be inserted into the socket part is provided at the rear end part. The plug portion provided at the rear end portion of the piece is fitted into the socket portion provided at the front end portion of the new tube piece on the rear side. A male screw may be provided in the plug portion, a female screw may be provided in the socket portion, and the front and rear new pipe pieces may be connected by screwing these screws.

  The cylindrical film has flexibility, flexibility, stretchability, water impermeability, abrasion resistance and predetermined pressure resistance, and suitable materials are organic resin materials such as polyester, polyethylene, and nylon. It is also possible to mix glass chips or the like for reinforcement. Further, the cylindrical membrane is configured to have an outer diameter that can be in close contact with the inner wall of the sewer main pipe 100 in the expanded state.

  The filler is a water curable material whose curing time and viscosity can be freely adjusted, such as cement milk, water glass, bentonite and the like.

  In FIG. 1, a start side manhole 101 and a part of an old sewer main 100 to be repaired extending from the manhole are shown in a central longitudinal section, and the sewer main 100 is cracked. 110, a crack 111, and a detached portion 112 are generated.

  FIG. 1 shows a leading device 1 used for repairing the sewer main 100 in a state where the leading device 1 is drawn into the sewer main 100, and the leading device 1 has a cylindrical main body 10. And an annular seal part 11 concentrically provided on the main body part, and provided on the main body part 10 connected to the annular seal part, having a frustoconical surface and being concentric with the main body part 10 The guide member 12 is provided.

  Around the main body 10, a plurality of wheels 13 are mounted for running in the sewer main 100 while maintaining the main body 10 concentrically with the sewer main 100.

  The annular seal part 11 is formed concentrically with the cylindrical main body part 10 and is formed of a ring material 11a having an outer surface made of a material having a small friction coefficient with respect to the cylindrical film, or 7 is formed by a rotating roller 14 as shown in FIG.

  As shown in FIG. 8, the leading device 1 is connected to a winch 9 installed in the reaching-side manhole 102 by a tow rope 90, and the hoisting action of the winch 9 causes the inside of the sewer main 100 to reach the reaching-side manhole. The robot moves at a predetermined speed toward 102. In this case, the leading device 1 is moved in synchronism with the following new tube piece insertion operation, and the moving speed thereof is the same as the insertion speed of the new tube piece.

  The wheel 13 and the traction rope 90 are members that act as traveling means that enable the leading device 1 to travel in synchronization with the following new tube piece insertion operation. The annular seal portion 11 is a member that acts as a support portion for the leading device 1.

  As shown in FIG. 1, after introducing the leading device 1 into the sewer main 100 from the starting side manhole 101, it is placed in the starting side manhole 101 so that the cylindrical membrane can be pulled out in a folded or rolled state. The entire circumference of one end edge of the cylindrical membrane 20 drawn out from the accommodated cylindrical membrane storage container 2 is closely fixed to the entire circumference of the edge of the one end side opening 100 a of the sewer main 100. This tight fixing is an annular end packing made of an elastic material such as rubber having an insertion portion 30 fitted to one end side opening portion 100a of the sewer main 100 and a flange portion 31 abutting against the edge portion 100b of the opening portion 100a. 3 is performed by inserting the insertion part 30 into the opening part 100a so that one end part of the cylindrical film 20 is sandwiched between the edge part 100b and the flange part 31. As a result, as shown in FIG. 1, the cylindrical membrane 20 is closely fixed to the entire periphery of the edge 100 b of the one end side opening 100 a of the sewer main pipe 100, so that the guide member 12 of the leading device 1 It is guided to the frustoconical surface and is guided to the storage container 2.

  Next, as shown in FIG. 2, the top pipe 4 is lowered into the start-side manhole 101 and placed concentrically with the sewer main 100 on a mounting table (not shown) installed in the manhole. Is done. At that time, the cylindrical membrane container 2 is moved into the top tube 4.

  The leading tube 4 is formed in a cylindrical shape, has substantially the same outer diameter as a new tube piece to be described later, and a tip edge 40 in the direction of inserting the new tube piece has an arc shape with a small friction coefficient with respect to the cylindrical film. It is formed as a convex surface.

  The leading pipe 4 is configured such that the guide member 12 and the annular seal portion 11 of the leading device 1 are fitted from the front end edge portion 40 side. The annular seal portion 11 is configured to face the inner peripheral surface portion 41 in the vicinity of the distal end edge portion 40 of the inner peripheral surface of the leading pipe 4. In this case, the inner diameter of the inner peripheral surface portion 41 and the outer diameter of the annular seal portion 11 are between the inner peripheral surface portion 41 and the annular seal portion 11 with a thickness slightly smaller than the thickness of the cylindrical film. When the cylindrical film is pulled in the direction of the leading edge 40, a gap is formed so that it can pass through without being damaged.

  In addition, a filler injection nozzle 42 is attached to the top pipe 4 in the vicinity of the inner peripheral surface portion 41, and this nozzle is connected to the filler storage tank 5 via a filler supply pipe 50. The filler storage tank 5 is disposed on the ground or on the work vehicle in the vicinity of the start-side manhole 101.

  In addition, the leading pipe 4 is provided with a connecting portion 43 with a new pipe piece, which will be described later, at the end opposite to the leading edge 40, and this connecting portion 43 is, for example, at the front end of the new pipe piece. When the socket part is provided, it is formed as a plug part inserted into the socket part.

  As shown in FIG. 2, after the leading pipe 4 is disposed at a predetermined position in the start side manhole 101, the main pushing device 6 is operated. The main pushing device performs a jacking action, and reciprocates the pushing member 60 between a rear position as shown in FIG. 2 and a front position as shown in FIG. As shown in FIG. 3, the leading pipe 4 is inserted into the leading pipe 4 by the main pushing device 6 from the position shown in FIG. 2, and the annular sealing portion 11 is inserted into the leading pipe 4. 11 is opposed to the inner peripheral surface portion 41 of the leading pipe 4 and is pushed until the cylindrical membrane 20 is sandwiched between the annular seal portion 11 and the inner peripheral surface portion 41.

  Next, with the fitting of the leading device 1 into the leading tube 4 being maintained, the leading tube 4 is pushed by the main pushing device 6, and the leading device 1 is moved to the reaching side manhole 102 by the winch 9 (see FIG. 8). Towed towards. In this case, it is clear that the movements of the leading tube 4 and the guiding device 1 are synchronized with each other.

  Since the one end edge of the cylindrical membrane 20 is fixed to the entire circumference of the edge 100b of the one end opening 100a of the sewer main pipe 100 as described above, the cylindrical membrane 20 is the tip of the leading pipe 4 that moves forward. It is sequentially pulled out from the storage container 2 by the pushing action of the edge portion 40 and passes between the annular seal portion 11 of the leading device 1 and the inner peripheral surface portion 41 of the leading pipe 4 while being pressed with an appropriate force from both sides. It is swung up, reversed at the leading edge 40, and fed to the outer peripheral side of the leading tube 4.

  As described above, since the leading device 1 is configured and arranged so as to be always concentric with the sewer main 100, the leading device 1 is internally connected to the annular seal portion 11 via the cylindrical film 20. The top pipe 4 in a state where the peripheral surface portion 41 is supported is also maintained concentrically with respect to the sewer main pipe 100. Therefore, a uniform gap is always provided between the front end edge 40 of the top pipe 4 and the sewer main pipe 100 over the entire circumference. Therefore, when the cylindrical membrane 20 is reversed at the front end edge 40, the cylindrical membrane 20 passes through a uniform gap around the entire circumference, and does not come into contact with the inner surface of the sewer main pipe 100. It is fed or introduced to the outer peripheral side of the top pipe 4 without receiving anything. In addition, the cylindrical film 20 is pulled out from the storage container 2 disposed in the leading pipe 4, passes through the guide member 12, and then goes directly to the leading edge 40, so that it is in contact with an obstacle on the way and damaged. There is no possibility of receiving. Therefore, the non-damaged cylindrical film 20 that can sufficiently perform the function is reliably charged on the outer peripheral side of the rehabilitated pipe constituted by the following new pipe pieces.

  3 further advances from the state shown in FIG. 3, and after the discharge port 44 of the nozzle 42 passes through the insertion portion 30 of the annular end packing 3, the nozzle 42 is filled with the filler via the filler supply pipe 50. The filling material is pumped from the storage tank 5 and filled between the leading pipe 4 and the cylindrical film 20 from the discharge port 44. FIG. 4 shows a state at the time when the leading pipe 4 is completely pushed by the main pushing device 6, and the filler 7 filled in the gap between the cylindrical membrane 20 and the leading pipe 4 is shown in FIG. A filler layer having a uniform thickness is formed around the top tube 4. The cylindrical film 20 pressed against the inner peripheral surface of the sewer main pipe 100 by the filler prevents leakage of the filler from the crack 110, for example.

  The filler to be injected under pressure reaches the front end edge portion 40 of the top tube 4, but the cylindrical membrane 20 is tightly sandwiched between the inner peripheral surface portion 41 and the annular seal portion 11. It is possible to prevent the filler from leaking between 41 and the cylindrical film 20. In addition, since the cylindrical film 20 moves in the direction of the distal end edge portion 40, the movement of the filler between the inner peripheral surface portion 41 and the cylindrical film 20 is also suppressed by this movement.

  Next, as shown in FIG. 5, the first new pipe piece 8-1 is lowered into the start side manhole 101, and the sewer main 100 is placed on a mounting table (not shown) in the start side manhole 101. It is arranged concentrically with the leading tube 4 inserted therein.

  At that time, in order to allow the filler supply pipe 50 to pass through the new pipe piece 8-1, a connecting end portion that can be engaged and disengaged is provided at an appropriate position in the middle of the filler supply pipe 50, Before placing the new pipe piece 8-1 on the mounting table, the connection end is removed, and after the new pipe piece 8-1 is placed, both connection ends are inserted into the new pipe piece 8-1. Alternatively, one connection end is passed through the new tube piece 8-1, and the both connection ends are engaged therewith.

  Next, the new pipe piece 8-1 is pushed toward the leading pipe 4 by the main pushing device 6, and the plug portion 43 provided at the rear end part of the leading pipe 4 is pushed by this pushing action. The new pipe piece 8-1 is connected to the leading pipe 4 by fitting into the socket section 80 provided in the section. Even after this connection is made, the new pipe piece 8-1 is continuously pushed, and this pushing operation is carried out by the new pipe piece 8-1 being completely inserted into the sewer main pipe 100 as shown in FIG. It is done until it is pushed. During the pushing operation of the new pipe piece 8-1, the leading pipe 4 is supported and the filler is continuously injected by the leading device 1. Therefore, as shown in FIG. 6, a uniform thickness filler layer 7 covered with a cylindrical film is formed around the top tube 4 and the new tube piece 8-1.

  After inserting the new tube piece 8-1 in this way, the cylindrical membrane storage container 2 may be transferred into the new tube piece 8-1 as necessary. This transfer is performed by an operator entering the top pipe 4 and the new pipe piece 8. Since the cylindrical membrane storage container 2 is thus arranged in the leading pipe 4 or the new pipe piece 8-1, when the subsequent new pipe piece is inserted into the sewer main pipe 100, the cylindrical membrane storage container 2 is used. The cylindrical membrane 20 drawn out from does not contact these subsequent new tube pieces and is not damaged.

  In the same manner as the above-described operation of inserting the new pipe piece 8-1 connected to the front pipe 4, new new pipe pieces are inserted into the sewer main pipe 100 one after another while being connected to the immediately preceding new pipe piece. Finally, a rehabilitation pipe made of a new pipe piece is formed in a sewer main pipe 100 between the start-side manhole 101 and the arrival-side manhole 102 in a state of being surrounded by a uniform-thickness filler. When the filler is solidified, the sewer main pipe 100 and the rehabilitated pipe are integrated by the filler, and cracks, cracks, and detached parts are repaired, resulting in a rehabilitated existing pipe having high strength and durability.

  FIG. 7 shows a modification of the annular seal portion 11 provided in the leading device 1. According to this modification, the annular seal portion 11 is arranged in an annular row connected in the circumferential direction, and is supported by the main body portion 10 so as to rotate in a direction to send the cylindrical film to the reversing portion. A plurality of rotating rollers 14 are provided. These rotating rollers 14 are formed of an elastic material such as rubber or resin, and are supported by a shaft 15 provided so as to extend in the circumferential direction of the main body 10. According to this modification, the traveling of the cylindrical film 20 passing through the space between the inner peripheral surface portion 41 of the leading pipe 4 and the annular seal portion 11 of the leading device 1 toward the tip edge portion 40 is caused by the rotation of the rotating roller 14. The operation is performed very smoothly by the operation, and the cylindrical film 20 is pressed against the inner peripheral surface 41 by the elastic action of the rotating roller 14, so that it is injected between the outer peripheral part of the top tube 4 and the cylindrical film 20. It is effectively prevented that the filler in the pressurized state passes through the space between the inner peripheral surface portion 41 and the cylindrical film 20 and leaks into the top tube 4.

  FIG. 8 shows that when a new pipe piece is inserted into the sewer main pipe 100, the cylindrical membrane storage container 2 is arranged in the leading pipe 4 or the subsequent new pipe piece 8-1 as in the first embodiment. Instead of this, a second embodiment in the case of being arranged outside the reaching-side manhole 102 is shown. Also in this case, as in the first embodiment, the annular seal portion 11 provided in the leading device 1 that is concentrically arranged and maintained with respect to the sewer main 100 is a circle provided in the top pipe 4. The cylindrical membrane 20 placed in a state facing the annular guide surface 41 and extending from one end portion fixed to the sewer main pipe 100 is reversed by the reversing portion 40 provided at the front end edge of the top tube 4, It passes between the annular guide surface 41 and the annular seal portion 11. Similarly, the leading device 1 is also moved through the sewer main 100 by the winch 9 through the tow rope 90 in synchronization with the insertion of the new pipe piece 8-1 and the subsequent new pipe pieces. .

  The difference from the first embodiment is that the cylindrical film 20 fed between the annular guide surface 41 and the annular seal portion 11 has an opening provided at the tip of the guide member 12 of the guide device 1. Folded at the portion 14, passes through the inside of the leading device 1, passes through the round hole 16 provided in the front end wall 15 of the leading device, passes through the unrepaired sewer main 100, passes through the arrival-side manhole 102, and is cylindrical It is guided so as to reach the film supply device 2. In this configuration, since the sewer main pipe 100 has a small diameter, and therefore the rehabilitation pipe formed of the new pipe piece has a small diameter, the cylindrical membrane storage container 2 cannot be disposed inside, so that the inside of the sewer main pipe 100 This is advantageous in that the cylindrical membrane 20 can be sent to the outer peripheral side of the top tube 4 without being affected by the new tube pieces inserted one after another. The cylindrical film supply device 2 may be disposed inside the arrival side manhole 102.

  In the first and second embodiments, the leading pipe 4 is used. Instead of the leading pipe 4, the first new pipe piece 8-1 is used as the leading pipe. May be. In that case, the first new pipe piece 8-1 is provided with a tip edge portion (40), an inner peripheral surface portion (41), and a filler injection nozzle (42) similar to those of the leading tube 4. As described above, when the first new pipe piece 8-1 is used as the leading pipe, it is not necessary to further perform the process of attaching the pseudo pipe as described above, and the arrival-side manhole does not use the pseudo pipe. When it is difficult to attach or when it is inappropriate to attach a pseudo tube and work, it is extremely advantageous to use the first new tube piece as the top tube.

  In addition, the first and second embodiments described above relate to the case where a cylindrical membrane is laid. However, when the cylindrical membrane is not laid, the filler is the first pipe or the first pipe when the filler is injected. In order to prevent escape from the front part of the new pipe piece, the outer circumference of the leading pipe or the first new pipe piece is sealed with a rubber or plastic ring to seal the existing pipe. A member is attached.

It is a center longitudinal cross-sectional view of a part of the start side manhole and the existing pipe which should be repaired extending from this manhole explaining the first process of the 1st Embodiment of this invention. FIG. 2 is a cross-sectional view similar to FIG. 1, showing a state in which preparations for inserting a leading pipe lowered into a starting side manhole into an existing pipe are performed. It is sectional drawing similar to FIG. 1 which shows the state which inserted the front pipe | tube into the existing pipe | tube with the main pushing apparatus, and was engaged with the leading apparatus previously inserted in the existing pipe | tube. It is sectional drawing similar to FIG. 1 which shows the state which inserted the whole top pipe | tube in the existing pipe | tube in the state which maintained the engagement state with the guide apparatus. It is sectional drawing similar to FIG. 1 which shows the state which prepared the state which prepared the first new pipe piece lowered | hung in the start side manhole to an existing pipe. It is sectional drawing similar to FIG. 1 which shows the state which connected the 1st new pipe piece with the top pipe, and was inserted in the existing pipe. It is a partial center longitudinal cross-sectional view of the engaging part of a leading device and a leading conduit which shows the modification of the annular seal part provided in the leading device. Extending from the manhole and the arrival side manhole showing the second embodiment in which the routing of the cylindrical membrane fed between the new pipe piece and the existing pipe is changed from the cylindrical membrane storage container. It is a center longitudinal cross-sectional view of a part of existing pipe which should be repaired. It is explanatory drawing of the general sewer installation repaired by applying the existing pipe repair method which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Leading device 10 Main body part of leading device 11 Annular seal part 12 Guide member 2 Cylindrical membrane storage container 20 Cylindrical membrane 3 Annular end packing 4 Leading pipe 40 Tip edge 41 Inner peripheral surface part 5 Filling material storage tank 6 Equipment 7 Filling material layer 8 New pipe piece 9 Winch 90 Tow rope 100 Existing pipe (Sewer main)
100a One end side opening part 100b Edge part 110 Crack 111 Crack 112 Detached part

Claims (13)

A rehabilitation pipe forming step for forming a rehabilitation pipe in the existing pipe by sequentially inserting and inserting a ready-made new pipe piece into the existing pipe to be repaired, and a time-curable filling between the rehabilitation pipe and the existing pipe In an existing pipe repair method including a filler filling step of filling a material,
The rehabilitation tube forming step includes:
A leading device for maintaining the leading tube concentrically with the existing tube is disposed in front of the leading tube connected to the front portion in the loading direction of the first new tube piece, and the leading device is disposed on the new tube. Move in the existing pipe synchronously with the piece insertion operation,
The filler filling step includes
It is performed by injecting the filler between the new pipe piece being inserted into the existing pipe and the existing pipe.
An existing pipe repair method characterized by this. Before the start of the rehabilitation tube forming process,
Performing a cylindrical membrane fixing step for tightly fixing the entire circumference of one end edge of the cylindrical membrane having the length and flexibility of the existing tube to the entire circumference of the edge of the one end side opening of the existing tube,
The rehabilitation tube forming step includes:
2. The new pipe piece includes inserting the cylindrical film into the existing pipe while inverting the cylindrical membrane at the leading edge of the leading pipe in the insertion direction and feeding it to the outer peripheral side of the leading pipe. The existing pipe repair method described in 1. The filler filling step includes
The existing pipe repair method according to claim 2, wherein the filling pipe is injected between the new pipe piece being inserted into the existing pipe and the cylindrical film.   The existing pipe repair method according to claim 2 or 3, wherein the leading edge of the leading pipe has a smooth outer surface shape.   The injection of the filler is performed during insertion of the new pipe piece from a nozzle provided in the vicinity of the leading edge of the leading pipe in the insertion direction. The existing pipe repair method described in the paragraph. The leading device is
Traveling means that enables traveling in synchronism with the insertion operation of the new pipe piece;
6. The apparatus according to claim 1, further comprising a support portion that fits into a front portion of the leading pipe and supports the leading pipe from the inside so as to be concentric with the existing pipe. The existing pipe repair method described in the paragraph. The traveling means includes
A plurality of wheels provided around the leading device so as to run while maintaining the leading device concentrically with respect to the existing pipe;
A tow rope for towing the leading device in the direction of inserting the new pipe piece;
The existing pipe repairing method according to claim 6, wherein: The support part of the leading device is
The cylindrical membrane was pulled toward the distal end edge in the insertion direction with a thickness of the cylindrical membrane or a dimension slightly smaller than the inner peripheral surface near the distal end edge in the insertion direction of the leading pipe. The existing pipe repairing method according to claim 6 or 7, characterized in that it is a ring-shaped seal portion facing each other with a gap that can pass through without being damaged. The annular seal portion is
The annular seal portion is arranged in series in the circumferential direction, and presses the cylindrical membrane toward the inner peripheral surface near the leading edge of the leading tube in the inserting direction, and at the leading edge of the inserting direction. The existing pipe repairing method according to claim 8, further comprising a plurality of elastic rotating rollers that are rotatably supported by the leading device so as to be rotated in a direction. The annular seal portion is
The existing pipe repairing method according to claim 8, wherein the pipe is repaired by a ring material having an outer peripheral surface having a small friction coefficient with respect to the cylindrical film. The cylindrical membrane is
11. The apparatus according to any one of claims 2 to 10, wherein the lead pipe or the new pipe piece to be inserted is pulled out from a cylindrical membrane supply device and guided to a leading edge portion in the insertion direction of the lead pipe. The existing pipe repair method according to item 1. The cylindrical membrane is
The supply device is arranged inside or outside the reaching manhole on the front side of the new tube piece insertion direction,
3. The feeding device passes through an unrepaired existing pipe, further passes through the leading device, and is guided from the rear side in the traveling direction of the leading device to the leading edge in the insertion direction of the leading tube. The existing pipe repair method of any one of 10-10.   Instead of the leading tube, the leading edge is a smooth reversal surface for the cylindrical membrane, and the filler injection nozzle is provided in the vicinity of the leading edge. The existing pipe repair method according to any one of claims 1 to 12, wherein a first new pipe piece whose end is connectable to a rearward new pipe piece is used.

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