JP2000257752A - Method for regenerating waste pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lay a new pipe while making the shared water flow in a regeneration block without providing a bypass passage by inserting a new pipe into a waste pipe, and filling a filler into a clearance between the new pipe and the waste pipe while using the inside of the new pipe as a passage for shared water. SOLUTION: After inserting a new pipe 14 into a waste pipe 10 from an insertion hole 11, a protector member is made to abut on an end of the new pipe 14, and a wire of a winch is connected to the protector member, and the new pipe 14 is pulled into the waste pipe 10. Partitioning walls 29, 30 are formed in a clearance between the new pipe 14 and the waste pipe 10, and a filler supplying pipe 31 is provided at an upper end of one partitioning wall 29, and a filler confirming pipe 32 is provided at an upper end of the other partitioning wall 30. A filler 35 is supplied to a clearance 34 between the new pipe 14 and the waste pipe 10 for filling from the ground through a supplying pipe 33 connected to the supply pipe 31. The filler confirming pipe 32 function as an air discharging port, and confirms the conclusion of filling with a flow of the filler 35 out of the filling confirming pipe 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for rehabilitating an old pipe.

[0002]

2. Description of the Related Art A pipe using a resin pipe or the like is used as a pipe for sewage. When such a pipe becomes obsolete, a new pipe with a slightly smaller diameter than this aging pipe is inserted and laid inside the aging pipe. That is being done.

[0003] In such a case, conventionally, a bypass is provided outside the rehabilitation section, for example, on a road, and the service water is allowed to pass therethrough. It is common to do. However, there is a problem that a bypass path must be provided. In the past, there has been a growing demand for rehabilitation while operating without the bypass pipe, and in order to respond to this,
A method has been proposed in which service water is stored in an aging pipe, and a new pipe is sent to the aging pipe while being floated by a float and then plumbed.

[0004]

It is necessary to fill a gap between the new pipe and the deteriorated pipe after the piping with an infill material such as air mortar. In such a case, as mentioned above, with the construction method in which new pipes are floated after storing service water in the old pipes, there is no problem with sending the new pipes into the old pipe, but difficulties are encountered when filling the infill material. There is a problem that occurs. In addition, when filling the infill material, a block or the like to prevent the new pipe from rising due to buoyancy must be installed in the gap between the new pipe and the old pipe at the top of the pipeline. However, there is a problem that it takes time and labor for the construction.

Accordingly, the present invention has been made to solve the above-mentioned problems, and allows a new pipe to be laid while supplying service water to a rehabilitation section without providing a bypass passage. The purpose of the present invention is to make it possible to easily fill the gap with the filling material and to easily prevent the rising of the new pipe at that time.

[0006]

In order to achieve this object, the present invention is to insert a new pipe into an old pipe in service and to prevent service water from entering a gap between the new pipe and the old pipe. Then, the space between the new pipe and the old pipe is filled with a filling material while the inside of the new pipe is used as a passage for service water.

[0007] In this manner, the service water is prevented from entering the gap between the new pipe and the old pipe, and the inside of the new pipe is used as a service water passage, so that the service water can be provided without providing a bypass. It is possible not only to lay a new pipe while passing through it, but also to fill the gap between the new pipe and the old pipe with the filling material without any problem, and to pass the service water inside the new pipe This prevents the rehabilitating new pipe from rising due to buoyancy when filling the infill material.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 10 denotes an aged pipe constituted by a resin pipe or the like, which is buried underground to form a sewer. When a new pipe is inserted into the aging pipe 10 to rehabilitate it, a pair of manholes 11 and 12 are formed from the surface of the pipe 1 at a suitable distance along the pipeline as shown in the figure.
Formed toward zero. Alternatively, a pair of existing human holes is used. Then, a new pipe 14 for rehabilitation is lowered into the old pipe 10 from one of the human holes 11 while the service sewage 13 is kept passing through the inside of the old pipe 10, that is, the bottom thereof. This new tube 1
The aging pipe 10 is similarly constituted by a resin pipe or the like.
It is formed with a slightly smaller diameter than the aged pipe 10 so that it can be inserted into the inside, and is configured to be connectable to each other by a joint portion of a receiving structure. A winch 16 is provided inside the aged pipe 10 at the position of the other human hole 12 using a support member 15 made of H-shaped steel or the like.

When the new pipe 14 is lowered into the deteriorated pipe 10 at the position of the human hole 11, a ring-shaped contact member 17 is applied to the end of the new pipe 14, and the wire 18 of the winch 16 is moved.
Is connected to the contact member 17, and the new pipe 14 is
Pull inside. A method in which the new pipe 14 is pushed into the aging pipe 10 by a jack provided at the position of the human hole 11 may be used.
The sending method of No. 4 is optional. In this way, the plurality of new pipes 14 are fed into the deteriorated pipe 10 between the human holes 11 and 12 while being connected to each other.

When the feeding of the new pipe 14 for rehabilitation is completed, as shown in FIG. 2, the weir 2 is placed inside the deteriorated pipe 10 upstream and downstream of the rehabilitation section by sandbags or the like.
0 and 21 are provided. Both ends of the pipeline rehabilitated by the new pipe 14 are closed by lids 22 and 23. Upstream lid 22
An inlet 24 is formed, and a water supply pipe 26 from a submersible pump 25 installed in the sewage 13 blocked by the upstream weir 20 is connected to the inlet 24. An outlet 27 is formed in the lid 23 on the downstream side, and the drain pipe 28 connected to the outlet 27 is guided to the inside of the deteriorated pipe 10 further downstream than the weir 21 on the downstream side.

The service sewage 13 flowing from the upstream
Is supplied to the inside of the new pipe 14 by the submersible pump 25 and stored inside the new pipe 14. That is, the inflow port 24 of the lid 22 and, in particular, the outflow port 27 of the lid 23 are formed at a position where the sewage 13 having a certain level and sufficient weight can be stored inside the new pipe 14. As shown in FIG. 3, when the sewage 13 at a certain water level accumulates inside the new pipe 14, the amount of the sewage 13 supplied from the upstream by the submersible pump 25 overflows from the outlet 27 to the downstream side.

Next, while maintaining this state, as shown in FIG.
Partition walls 29, 30 are formed at the gap between the aging pipe 10 and the aging pipe 10, and the supply pipe 31 of the filling material is installed in the upper end part of one of the partition walls 29 in a penetrating state, and the upper end of the other partition wall 30. A filling confirmation tube 32 of the filling material is installed in the portion in a penetrating state. Then, using a supply pipe 33 connected to the supply pipe 31, an infill material 35 such as air mortar is supplied and filled from the ground toward the gap 34 between the new pipe 14 and the deteriorated pipe 10. The filling confirmation tube 32 functions as an air vent at the time of filling, and when the filling is completed, the filling material 35 flows out from the filling confirmation tube 32, so that it is necessary to confirm that the filling is completed. Used.

At the time of filling the infill material 35, the new pipe 14 receives buoyancy from the infill material 35. As described above, the service sewage 13 at a constant water level is stored inside the new pipe 14, and Since the weight is corresponding, the occurrence of an accident such as floating on the new pipe 14 at the time of filling can be reliably prevented. In other words, the inflow port 24 and especially the outflow port 27 are formed in advance at a height that can secure a water level of the sewage 13 which is sufficient in weight so that the new pipe 14 does not rise due to the buoyancy from the filling material 35. .

After half a day to one day has passed since the filling, the filled infill material 35 hardens, so that the water blocking lids 22 and 23 are removed as shown in FIG.
If 1 is dismantled, the rehabilitation work is completed. In this way, by passing the service sewage 13 into the new pipe 14, the new pipe 14 can be laid in the rehabilitation section without providing a bypass, and the service sewage 13 is passed through the new pipe 14, and Aged pipe 10
Since the in-service sewage 13 does not pass through the gap 34, the infill material 35 can be easily filled into the gap 34, and at that time, the floating of the new pipe 14 can be easily prevented.

In the above description, the case where the aged pipe 10 is a pipe for flowing sewage is illustrated, but the type of service water flowing in this pipe is not limited.

[0016]

As described above, according to the present invention, a new pipe is inserted into an aging pipe in service to prevent service water from entering a gap between the new pipe and the aging pipe. While filling the gap between the new pipe and the old pipe with the filling material while using the inside of the new pipe as the water supply path, the new pipe can be laid while passing the water without a bypass. To
The gap between the new pipe and the old pipe can be easily filled with the filling material without any problems.In addition, by passing service water inside the new pipe, the new pipe for rehabilitation is filled with buoyancy when filling the filling material. Floating can be prevented.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining a method of rehabilitating an aging pipe according to an embodiment of the present invention.

FIG. 2 is a view for explaining a next construction stage of FIG. 1;

FIG. 3 is a view for explaining a next construction stage of FIG. 2;

FIG. 4 is a diagram illustrating a stage following the completion of the construction in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Aged pipe 13 Service sewage 14 New pipe 20, 21 Weir 22, 23 Lid 24 Inlet 27 Outlet 34 Gap 35 Filling material

Claims (1)

[Claims] 1. A new pipe is inserted into an old pipe in service to prevent service water from entering a gap between the new pipe and the old pipe, and then the inside of the new pipe is used as a passage for service water. A method for rehabilitating an old pipe, characterized by filling a gap between the new pipe and the old pipe with a filling material.