JP2898195B2 - How to fix the intubation to the sheath tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intubation tube made of synthetic resin or the like for rehabilitating aged pipes such as sewer pipes buried underground without cutting the ground from the ground. And a method of inserting it into a sheath tube and fixing it with a backfill material.

[0002]

2. Description of the Related Art Concrete sewage pipes settle down as they age due to the effects of corrosive gas, earth pressure, etc., and may cause a step or a bent state at the joints between the pipes. There is. Sewage pipes are usually designed to allow sewage to flow by gravity, but when sinking is severe,
If the pipe has a reverse slope or bends greatly, the sewage may be accumulated without flowing. For this purpose, an intubation tube made of synthetic resin or the like is inserted into an aged sewer pipe, and the sewer pipe that has settled, steps, bent, etc. is fixed at a constant gradient, thereby rehabilitating the sewer pipe. That is being done. The intubation inserted into the sewer is fixed at a constant gradient through which the sewer flows by the backfill material filled between the sewer and the intubation.

[0003] When filling the backfill material between the sewer pipe and the intubation tube, the intubation tube inserted into the sewer pipe having a certain gradient floats by the backfill material to be filled and is filled with the backfill material. It is necessary to fix the intubation to the sewer so that the posture does not change.

For this purpose, for example, Japanese Patent Application Laid-Open No. 62-280
No. 426 discloses a method in which a wire is inserted through an intubation, the wire is pulled to a predetermined inclination with respect to a sewer pipe, and the intubation is locked and fixed to the pulled wire. Is disclosed.

Also, Japanese Patent Application Laid-Open Nos. 53-62313, 57-96142, and 64-83740.
In the publication, a plurality of spacers are interposed at appropriate intervals in the pipe axis direction between the sheath tube and the intubation tube, and the intubation tube is fixed to the sewer pipe so that it has a predetermined inclination gradient. A method for doing so is disclosed.

Further, Japanese Patent Application Laid-Open No. 1-223234 discloses that an insertion tube is placed on a mortar in a state where a mortar or the like is placed at the bottom of a sewer pipe so as to have a predetermined inclination. A method of filling and fixing a backfill material in a state where a liquid such as water is filled in the placed intubation is disclosed.

[0007]

SUMMARY OF THE INVENTION An intubation is fixed to a sewer with a wire inserted into the intubation.
In the method disclosed in Japanese Unexamined Patent Application Publication No. 2-280426, since the insertion tube is locked to the pulled wire, if the insertion tube made of synthetic resin becomes longer, the central portion in the tube axis direction bends downward. State. In such a case, the wire must be pulled more strongly. However, in this case, the wire may be cut, and the bending of the intubation cannot be easily eliminated. As a result, there is a problem that the long intubation cannot be fixed at a predetermined inclination by the wire.

Japanese Patent Application Laid-Open Nos. 53-62313 and 57-9614, in which a spacer is interposed between an intubation tube and a sewer tube to fix the intubation tube to the sewer tube.
No. 2, JP-A-64-83740, and the like, when the space between the sheath tube and the intubation tube is small, the spacer cannot be easily interposed in the space. . Therefore, if the inner diameter of the insertion tube is not sufficiently smaller than the inner diameter of the sewer pipe, the spacer may not be able to be interposed.

Further, in the method of placing mortar or the like in a sewer pipe to install an intubation, and filling the intubation with a fluid such as water to fix the intubation, sewage is prevented from flowing into the sewer pipe. It is necessary to surely stop water. In addition, it is necessary to completely discharge sewage, etc. in the sewer pipes. If the sewer pipes have a reverse slope due to settlement, etc., and the sewage, etc. has accumulated, the accumulated sewage, etc. should be discharged. Is not easy. Also, when the inner diameter of the intubation installed on a mortar or the like is large, a large amount of liquid must be filled in the intubation, which causes a problem in workability. Each end face of the intubation tube must be securely sealed so that the liquid filled therein does not leak. Furthermore, when the specific gravity of the backfill material filled between the drain pipe and the intubation is smaller than the liquid such as water filled in the intubation, the intubation may rise. While the intubation is fixed in the sewer, the sewage cannot flow into the intubation,
The sewage flow upstream of the intubation must be shut off for a long time.

The present invention has been made to solve such a problem, and an object of the present invention is to make it possible to efficiently and surely fix an intubation to a sheath tube such as a sewer pipe. It is to provide a fixing method. It is another object of the present invention to provide a method capable of securely fixing an intubation to a sheath tube even when the outer diameter of the intubation is large or the intubation is long. Still another object of the present invention is to provide a method of fixing an intubation to a sheath tube that allows sewage or the like to flow through the intubation even when a backfill material is filled between the sheath tube and the intubation tube. To provide. Still another object of the present invention is to provide a method for fixing an intubation to a sheath tube which can easily install the intubation at a predetermined gradient.

[0011]

According to the first aspect of the present invention, when an intubation is inserted into a sheath tube and a backfill material is filled between the sheath tube and the intubation tube, the backfill material is used. A method of fixing an intubation to a sheath tube in order to prevent the intubation from floating, comprising a plurality of support members fixed in an extended state and a contracted state, and having a predetermined pitch in the pipe axis direction at the top of the intubation. The upper end surface of each support member is pressed against the top inner peripheral surface of the sheath tube, and the lower end surface of each support member is pressed against the bottom inner peripheral surface of the insertion tube. Things,
Thereby, the above object is achieved.

According to a second aspect of the present invention, there is provided a method of inserting an intubation into a sheath tube, filling a backfill material between the sheath tube and the intubation tube, and fixing the intubation to the sheath tube. A plurality of support members fixed in an extended state and a contracted state are respectively penetrated at a predetermined pitch in the pipe axis direction through a top portion of an intubation tube installed in a sheath tube, with each of the support members being in an extended state having a predetermined length. Let me
A step of bringing the lower end surface of each support material into contact with the bottom inner peripheral surface of the intubation, and filling the backfill material in the gap between the sheath tube and the intubation,
A step of pressing the upper end surface of each support material to the inner peripheral surface of the top of the sheath tube by floating the intubation tube, whereby the above object is achieved.

The backfill material must have a specific gravity that allows the intubation to float.

By providing the support material at a predetermined pitch of about 1 to 5 m in the tube axis direction, the intubation can be securely fixed to the sheath tube, which is preferable.

[0015] The sheath tube is an existing tube, and is not particularly limited.

The inner tube is preferably a spiral tube manufactured by spirally winding a belt made of synthetic resin, but is not particularly limited, and may be a polyvinyl chloride resin, a fiber reinforced resin, or the like.
A synthetic resin tube such as a polyethylene resin or an unsaturated polyester resin can be used.

[0017]

According to the first aspect of the present invention, the bottom of the inner tube is pressed against the bottom of the sheath tube by the plurality of support members pressed against the inner peripheral surface of the top of the sheath tube. Fixed. In such a state, when the backfill material is filled between the sheath tube and the intubation tube, buoyancy acts on the intubation tube by the backfill material, but it is fixed to the sheath tube by the support material. There is no danger of the intubation being lifted.

According to the second aspect of the present invention, a plurality of support members having a predetermined extension length are passed through the top of the intubation tube at a predetermined pitch in the pipe axis direction. When the backfill material is filled between the intubation tube and the sheath tube with the end surface in contact with the bottom of the intubation tube, the intubation tube floats due to the buoyancy of the backfill material, and the upper end surface of each support material is sheathed. By being pressed against the top of the tube, the intubation is fixed at a predetermined gradient.

[0019]

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

FIG. 1 is a sectional view showing an example of an embodiment of a method for fixing an intubation tube to a sheath tube according to the present invention, and FIG. 2 is a partially cutaway enlarged view thereof. In the method of the present invention, an intubation tube 20 made of a synthetic resin or the like is inserted into a sewer pipe 10 as an aged sheath pipe.

As the intubation tube 20, a spiral tube manufactured by spirally winding a band made of synthetic resin is used. As shown in FIG. 3, the spiral pipe is manufactured by a pipe-making machine 28 disposed in the manhole 12 to which one end of the sewage pipe 10 is connected. Obinaka 29 is the manhole 1
2, is fed to the tube making machine 28, is spirally wound by the tube making machine, engages each side of the strip 29, and has an inside diameter sufficiently smaller than the inside diameter of the sewer pipe 10. Spiral tube. Then, this spiral tube is inserted into the sewer pipe 10 as the intubation pipe 20.

A plurality of through holes 21 are formed at the top of the insertion tube 20 inserted into the sewer pipe 10 at a pitch of, for example, 2 m along the pipe axis direction. A ring-shaped seal member 22 made of an elastic material such as rubber is fitted into each through hole 21. The intubation tube 20 inserted into the sewer pipe 10 is inserted into each of the through holes 21 and extends and contracts in a linear support member 30.
Is fixed in the sewer pipe 10.

Each support member 30 has a hollow vertical rod 31 that is inserted vertically into the inner tube 20. The upper part of the vertical rod 31 extends into the sewer pipe 10 through the through hole 21 provided at the top part of the inner tube 20, and its upper end surface is pressed against the inner peripheral surface of the top part of the sewer pipe 10. It has become. The outer peripheral surface of the vertical rod 31 inserted through the through hole 21 of the inner insertion tube 20 is sealed in a liquid-tight state by pressing the sealing material 22 disposed in the through hole 21 into pressure.

As shown in FIG. 2, a nut member 31a is provided at a lower portion of the vertical rod 31 inserted through the inner tube 20, and the nut member 31a is attached to the vertical rod 31.
The male screw portion of the outer peripheral surface of the screw rod 32 inserted into the lower end of the screw thread is screwed. A horizontal base plate 33 is attached to the lower end surface of the screw rod 32.

At the lower end of the vertical rod 31, a pair of handles 34 in a linear state for rotating the vertical rod 31 are attached in a horizontal state.
When the vertical rod 31 is rotated forward and backward by 4, the screw rod 32 advances and retreats from the vertical rod 31. As a result, the entire linear support member 30 is extended and contracted, and is fixed in its extended state and contracted state.

At the bottom inside the intubation 20, a wooden pedestal 3
5 are arranged. The base 35 on the lower end surface of the screw rod 32 screwed to the lower end of the vertical rod 31 is pressed against the receiving base 35.

The supporting material 30 has a belly 40
Is attached. The upset 40 is a connecting member 41 attached in the middle of the vertical rod 31 of the support member 30.
And a pair of horizontal rods 42 supported by each connecting member 41 in a horizontal state. The connecting member 41 has a cylindrical sleeve portion 41b extending horizontally in opposite directions at a central portion of a cylindrical main body portion 41a fitted and fixed to the support rod 31. One end of each hollow horizontal rod 42 is inserted and fixed in the sleeve 41b.

At the other end of each horizontal rod 42, a nut member 42a is provided.
A male screw portion on the outer peripheral surface of each screw rod 43 inserted into the lower end of each horizontal rod 42 is screwed to 2a. At the lower end surface of each screw rod 43, a base plate 44 is
3 are mounted in a state orthogonal to the axis.

At the end of each horizontal rod 42 into which the threaded rod 43 is inserted, a pair of linear handles 45 for rotating each horizontal rod 42 is attached in a linear state. By each horizontal rod 42
Are rotated forward and backward, so that each screw rod 43 advances and retreats from each horizontal rod 42. Thereby, each linear horizontal rod 42 is extended and contracted as a whole, and is fixed in the respective extended and contracted states.

The base plate 44 of each screw rod 43 screwed to each horizontal rod 42 is pressed against the inner peripheral surface of the insertion tube 20 via a wooden receiving base 46.

First, a method of fixing an intubation to a sheath tube according to the present invention will be described. When the intubation 20 is inserted into the sewer pipe 10, each of the through-holes 2
Each support member 30 is inserted in turn in the order 1 and each support member 30 is fixed. When fixing each support member 30, first, the vertical rod 31 to which the connecting member 41 is attached in the middle is contracted, and the upper part of the vertical rod 31 is inserted into the through hole 21. The vertical rod 31 is brought into pressure contact with the sealing material 22 provided in the through-hole 21 of the insertion tube 20, and the vertical rod 31 and the through-hole 21 are brought into contact with each other.
Is in a sealed state.

Thereafter, on the inner peripheral surface at the bottom of the inner tube 20, respective receiving stands 35 are arranged so as to face the respective through holes 21.

In such a state, the vertical rod 31
The screw rod 32 screwed to the lower end of the vertical rod 31
The vertical rod 31 is rotated using the pair of handles 34 so that the vertical rod 31 is moved out of the vertical direction. The screw rod 32 advances from the vertical rod 31 by the rotation of the vertical rod 31.
As for the vertical rod 31, the base plate 33 attached to the screw rod 32 is pressed against the receiving base 35, and the upper end surface of the vertical rod 31 extending from the through hole 21 of the inner tube 20 is the top inner peripheral surface of the sewer pipe 10. Rotated until pressed against.

Accordingly, the bottom of the inner tube 20 inserted into the sewer pipe 10 is pressed against the inner peripheral surface of the bottom of the sewer pipe 10 by the support member 30 pressed against the inner peripheral surface of the top of the sewer pipe 10. And the intubation 2
0 is fixed.

In this way, each through-hole 2 of the
When the support members 30 are respectively attached to the support members 1, the stomach 40 is attached to the sleeve 41 b of the connecting member 41 attached in the middle of the vertical rod 31 in each support member 30.
The base end of each horizontal rod 42 is fitted and attached. The horizontal rods 42 are rotated using the handle 44 in a state where the wooden pedestals 46 are in contact with the respective inner peripheral surfaces of the intubation tube 20 facing in the horizontal direction. The rod 43 is advanced from the tip of each horizontal rod 42. The rotation of each horizontal rod 42
Is continued until the base plate 44 attached to the distal end portion is pressed against the receiving table 46 that is in contact with the inner peripheral surface of the inner cannula 20.

When the base plate 44 of each horizontal rod 42 is pressed against the receiving table 46, the inner peripheral surfaces of the intubation tube 20 facing in the horizontal direction become the horizontal rods 42 and the screw rods 42.
Is pressed outward.

In this manner, the insertion tube 20 is fixed to the sewer pipe 10 by the support members 30, and the abdominal uprights 40 attached to the support members 30 respectively allow the horizontal insertion of the insertion tube 20. When the inner peripheral surfaces opposing each other are pressed outward, the backfill material 50 is filled between the inner tube 20 and the sewer 10.

As the backfill material 50, cement mortar such as foamed mortar and cement milk is usually used. Since the buoyancy acting on the intubation tube 20 varies depending on the backfill material 50 used, the backfill material 50 should be as
It is preferable to use one having a liquid specific gravity of 1.0 or less.

When the backfill material 50 is filled between the intubation tube 20 and the sewer pipe 10, the backfill material 50 causes the backfill material 50 to be filled.
Has buoyancy. V (m ³ )
Assuming that the specific gravity of the backfill 50 is ρ (kg / m ³ ) and the mass of the intubation 20 is w (kg), the buoyancy F (kgf) = V · ρ−w is applied to the intubation 20 by the backfill 50. Works. However, the intubation 20 has a buoyancy F due to the backfill material 50.
Each support member 30 arranged at a predetermined pitch in the pipe axis direction is fixed to the bottom of the sewer pipe 10 in a state pressed against the bottom of the sewer pipe 10. There is no risk of rising.

Since the inner peripheral surfaces of the intubation 20 opposed in the horizontal direction are supported by the horizontal rods 42 of the belly 40, the backfill material between the drain pipe 10 and the intubation 20 is provided. Even if pressure is applied to the intubation 20 by 50,
There is no risk of the intubation tube 20 being deformed or buckled.

The vertical rod 31 of each support member 30 which passes through each through hole 21 of the inner tube 20 has an outer diameter of usually about 50 mm, but has elasticity provided in each through hole 21. Since the inner diameter of the seal member 22 is slightly smaller than the outer diameter of the support member 30, the seal member 22 is pressed against the outer peripheral surface of the vertical rod 31 over the entire circumference, and The backfill material 50 filled between the inner pipe 2 and the drain pipe 10 extends along the outer peripheral surface of the vertical rod 31.
There is no danger of flowing into zero.

In order to improve the sealing performance between each through hole 21 and the vertical rod 31, an epoxy-based sealing agent is applied to the outer peripheral surface of the vertical rod 31 which comes into contact with the sealing material 22, or a rubber ring is used. May be fitted.

When the backfill material 50 filled between the intubation tube 20 and the sewage pipe 10 hardens and loses fluidity, each support member 30 for fixing the intubation tube 20 to the bottom of the sewage pipe 10, Each belly 40 that pushes the intubation 20 outward is removed. Each support member 30 is entirely contracted by rotating the vertical rod 31 to retract the screw rod 32 into the vertical rod 31, thereby inserting the canal into the bottom of the sewer pipe 10. Pressing of the bottom of 20 is released. Thereafter, the vertical rod 31 is inserted into the through-hole 21 of the intubation tube 20.
The supporting material 30 is removed from the inner intubation 20 by being pulled out from the inner intubation 20 and being carried out of the inner intubation 20.

At this time, at the same time, the sealing material 22 disposed in each through hole 21 of the inner cannula 20 is also removed. The abdomen 40 is also rotated by rotating each horizontal rod 42,
Is retracted into the horizontal rod 42 so that the whole belly upset 40 is in a contracted state, and after the pressing of the intubation 20 by the belly upset 40 is released, it is removed.

When the support material 30 is removed, a hardened backing material 50 is placed above each through hole 21 at the top of the intubation 20.
The upper portions of the vertical rods 31 are fitted into the recesses, and the recesses are respectively formed. Fillers such as resin mortar, early-strength cement, and the like are filled in the respective recesses from the respective through holes 21, and the respective recesses are formed. And the through hole 21 is closed. In addition,
Instead of a filler such as resin mortar or early-strength cement, a cap with a synthetic resin flange is fitted from the through hole 21 into the recess of the backfill material 50, and the flange abutting on the periphery of the through hole 21 is bonded. The concave portion and the through hole 21 may be closed by adhering to the inner peripheral surface of the inner tube 20 with an agent.

In this way, the inserted tube 20 inserted into the sewer tube 10 is fixed in the sewer tube 10 by the backfill material 50, and the deteriorated sewer tube 10 is rehabilitated by the inserted tube 20. Is done.

In the above embodiment, the support member 30 which can be extended and contracted is constituted by the vertical rod 31 and the screw rod 32 screwed to the vertical rod 31. It may be configured to be extended and contracted by a jack.

Next, the method according to the present invention will be described. When fixing the intubation with a predetermined gradient to the sheath tube, first, as shown in FIG. 4A, the planned gradient of the intubation 20 is set for the sewer pipe 10. . In the embodiment shown in FIG. 4A, a part of the drain pipe 10 has a reverse slope. When the planned gradient line 11 for the sewer pipe 10 is set, the laser beam transmitter 51 is installed in one end of the sewer pipe 10, and the target 52 is installed in the other end of the sewer pipe 10. Then, a laser beam is emitted along the planned gradient line 11. Then, the distance between the sewer pipe 11 and the top and the planned slope line 11 is measured at a predetermined pitch of, for example, 2 m in the pipe axis direction of the sewer 10 in correspondence with the through hole provided at the top of the intubation 20. I do.

In this manner, when the distance between the planned gradient line 11 and the top of the sewer pipe 10 is measured at a predetermined pitch in the pipe axis direction, the inner diameter of the inner pipe 20 inserted into the sewer pipe 10 becomes Based on each support material 3 corresponding to each arrangement position
An extension length of 0 is calculated. The extension length of each support member 30 is calculated by subtracting the height of the cradle 35 from the distance from the top of the sewer pipe 10 to the bottom of the intubation 20 at the planned slope.

When the extension length is calculated in this manner,
Each support member 30 has a predetermined calculated extension length corresponding to each arrangement position.

When the extension length of each support member 30 to be attached to the intubation tube 20 is set in advance in this way, the intubation tube 20 is inserted into the sewer pipe 10. And the sewer pipe 10
Each support member 30 set to a predetermined extension length corresponding to each installation position is inserted in order into each through hole 21 of the insertion tube 20 inserted therein.

Each support member 30 has an upper portion of a vertical rod 31 inserted into a predetermined through hole 21.
Pedestals 3 arranged on the bottom of the intubation 20 so as to face the
The base plate 33 is placed on and abuts on the base plate 5.

Each of the vertical rods 31 is brought into pressure contact with the sealing material 22 provided in the through-hole 21 of the inner tube 20, and the space between the vertical rod 31 and the through-hole 21 is sealed. .

Thus, as shown in FIG. 4 (c), the vertical rods 3 of the support members 30 are inserted from the top of the insertion tube 20 inserted into the sewer pipe 10 and installed on the bottom of the sewer pipe 10.
1 are in a state of extending by a predetermined length corresponding to the respective arrangement positions.

In this way, each through-hole 2 of
When the supporting members 30 each having a predetermined extension length are attached to the supporting members 30, the supporting members 30 are bent upright.
0 is attached. As a result, the base plate 44 of each belly upset 40 is pressed against the receiving pedestals 46 disposed on the respective inner peripheral surfaces of the intubation 20 opposed to each other in the horizontal direction.
0, each inner peripheral surface facing in the horizontal direction is
And the screw rod 42 is pressed outward.

In this manner, the insertion tube 20 is fixed to the sewer pipe 10 by the respective support members 30, and the abdominal uprights 40 attached to the respective support members 30 respectively allow the horizontal insertion of the insertion tube 20. When the inner peripheral surfaces opposing each other are pressed outward, a backfill material 5 similar to that of the above-described embodiment is provided between the inner tube 20 and the drain pipe 10.
Zeros are filled.

When the backfill material 50 is filled between the intubation tube 20 and the sewer pipe 10, the intubation tube 20 floats by the buoyancy of the backfill material 50. When the intubation 20 rises,
The upper end surface of the vertical rod 31 above each support member 30 arranged at a predetermined pitch in the pipe axis direction is pressed against the top of the sewer pipe 10. Thereby, as shown in FIG. 4B, the bottom of the intubation tube 20 inserted into the sewer pipe 10 is supported by the support member 30 pressed against the inner peripheral surface of the top of the sewer pipe 10.
In this state, the inner tube is pressed against the inner peripheral surface of the bottom of the inner tube 0, and the inner tube 20 is fixed to the sewer tube 10 at a predetermined gradient.

When the intubation tube 20 is fixed in this way, the backfill material 50 is hardened. However, the inner peripheral surfaces of the intubation tube 20 facing in the horizontal direction are fixed to the horizontal rods 4 of the belly upright 40.
2, there is no possibility that the intubation tube 20 is deformed or buckled even if pressure is applied to the intubation tube 20 by the backfill material 50 between the sewer pipe 10 and the intubation tube 20.

When the backfill material 50 filled between the intubation tube 20 and the sewer pipe 10 hardens and loses fluidity, the supporting members 30 for fixing the intubation tube 20 and the intubation tube 20 are moved outward. Each of the pressing bellies 40 is removed, and each of the recesses and the through holes 21 in the backfill material formed above the through holes 21 at the top of the intubation tube 20 are respectively closed.

In this manner, the inserted tube 20 inserted into the sewer pipe 10 is fixed in the sewer pipe 10 with a predetermined gradient by the backfill material 50, and
As a result, the aging sewer pipe 10 is rehabilitated.

[0061]

As described above, the method of fixing the intubation to the sheath tube according to the present invention is such that the bottom of the intubation tube is pressed against the bottom of the sheath tube by each support material pressed against the top of the sewer pipe. Therefore, even a long intubation can be reliably fixed to the sheath tube. Even when the distance between the sheath tube and the intubation is small, the intubation can be reliably fixed to the sheath tube. Even when the backfill material is filled, sewage or the like can flow through the intubation tube, so that work can be performed efficiently.

Further, each support material, which has been extended to a predetermined length in advance, is made to penetrate through the top of the sheath tube at a predetermined pitch in the tube axis direction in a state where the support material is in contact with the inner peripheral surface at the bottom of the intubation tube. By filling the backfill material between the intubation tube and the sheath tube and floating the intubation tube, the intubation tube can be fixed at a predetermined gradient by each support material. Can be reliably fixed to a predetermined gradient. Even when the distance between the sheath tube and the intubation is small, the intubation can be reliably fixed at a predetermined gradient. Even when the backfill material is filled, sewage or the like can flow through the intubation tube, so that work can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a sewer pipe showing an example of an embodiment of a method of fixing an intubation tube to a sheath tube according to the present invention.

FIG. 2 is an enlarged view of a main part of a cross-sectional view of the sewer shown in FIG.

FIG. 3 is a longitudinal sectional view showing a state where an intubation is inserted into the sewer shown in FIG. 1;

FIG. 4 is a view for explaining an embodiment of a method of fixing an intubation tube to a sheath tube according to the present invention, wherein (a) is a longitudinal sectional view of a sewer pipe, and (b) is a state in which a backfill material is filled. (C) is a cross-sectional view of the sewer pipe showing the state of each support member of the intubation tube installed in the sewer pipe, showing the state of each support member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Sewage pipe 20 Inner tube 21 Through hole 22 Sealing material 30 Support material 31 Vertical rod 32 Screw rod 35 Receiving stand 40 Belly upset 42 Horizontal rod 43 Screw rod

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-2-96089 (JP, A) JP-A-1-223234 (JP, A) JP-A-64-83740 (JP, A) JP-A-62- 280426 (JP, A) JP-A-57-96142 (JP, A) JP-A-53-62313 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02B 9/06 E03F 3 / 06 F16L 1/024 F16L 1/038

Claims (2)

(57) [Claims] When inserting an intubation into a sheath tube and filling a backfill material between the sheath tube and the intubation tube, the sheath tube is inserted into the sheath tube in order to prevent floating of the intubation tube by the backfill material. A method of fixing an intubation by using a plurality of supports fixed in an extended state and a contracted state,
By penetrating and extending the top of the intubation at a predetermined pitch in the pipe axis direction, the upper end surface of each support material is pressed against the inner peripheral surface of the top of the sheath tube, and the lower end surface of each support material is inserted into the intubation tube. A method of fixing an intubation tube to a sheath tube, which is in press contact with a bottom inner peripheral surface. 2. A method of inserting an intubation into a sheath tube, filling a backfill material between the sheath tube and the intubation tube, and fixing the intubation tube to the sheath tube. Several support materials fixed in a state,
Each of them is extended to a predetermined length, and is penetrated at a predetermined pitch in the pipe axis direction at the top of the intubation tube installed in the sheath tube, and the lower end surface of each support material is brought into contact with the bottom inner peripheral surface of the intubation tube. A step of contacting, filling a backfill material in a gap between the sheath tube and the intubation tube, and floating the intubation tube, thereby pressing the upper end surface of each support material against the top inner peripheral surface of the sheath tube. A method for fixing an intubation to a sheath tube, comprising: