JPS62254882A - Method for repairing buried pipeline - Google Patents

Abstract

PURPOSE:To prevent the intrusion of underground water from the repair point of a pipeline and the blow of pressure fluid into the pipeline by forming a tube lining to the inside surface of the pipeline in succession to press-filling of a repair liquid agent to the repair point thereof. CONSTITUTION:Sealing resistance members 3, 4 spaced from each other are installed to the inside at the beginning end of the pipeline 1 and the consolidatable repair liquid agent 5 is filled between the members 3 and 4. the members 3, 4 are advanced to insert the tube 6 reversally into the pipeline and the reversed part 6a thereof is brought into tight contact with the rear surface of the rear member 4. Compressed air is supplied into the pipeline 1 in this state, then the reversed part 6a moves forward and the lining 6b of the tube 6 is formed in the pipeline 1 as said part moves. The members 3, 4 and the repair liquid agent 5 move as well in the pipeline 1 at the same instant..The repair liquid agent 5 in the pressurized state is press-filling into a corroded hole 11 of the pipeline 1 when the repair liquid agent 5 comes to the position of said hole 11. The reversed part 6a passes right after the passage of the rear member 4 and the lining 6b is formed in the pipeline 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for repairing existing buried pipes such as sewer pipes and power pipes.

Conventional technology Conventionally, as a repair method for this type of buried pipe, the buried pipe was sealed with a solidifying resin liquid, and the sealed resin liquid was moved inside the pipe under pressure with compressed air. Yoshi,
A repair method has been proposed that involves filling the leaked area with resin liquid under pressure.

However, in the conventional repair method described above, compressed air is used as a means of moving the resin liquid that is sealed inside the pipe, so the resin liquid is pressurized and filled into repaired areas of the pipe, such as cracks and corroded holes. Even if this is done, it takes some time for the resin liquid to solidify, so there is a risk of compressed air blowing through the resin-filled area, and there is a drawback that repair reliability is lacking.

In this case, for example, if a mechanical moving means such as a filling backer is used instead of compressed air, the problem of blowout can be solved, but if the pipe is buried below the groundwater level, There is a risk that the filled resin will be swept away into the pipeline under water pressure, again making the repair unreliable.

The present invention has been made with the aim of eliminating such conventional problems.

The present invention relates to an inverted portion of a tube that is inserted inverted and lined from the start end side of a buried pipeline, a pair of front and rear seal resistance members installed in the start end of the buried pipeline, and a second seal resistance member. With the caking repair liquid sealed and filled in the pipe between the members connected in series, it is forcibly moved inside the pipe from the starting end to the terminal end with the front resistance member at the beginning, and during this movement the pipe The present invention relates to a method for repairing a buried pipeline, which is characterized by press-filling a repair liquid into a repaired area of the pipeline, and forming a tube lining in the pipeline following the press-fitting.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in Fig. 1, at the fire source of the method of the present invention, a terminal pipe (2) is attached to the starting end of the pipe line (1), and a pair of front and rear seal resistance members (3) (4) are installed inside the terminal pipe (2). Installed at intervals in the front and back direction, between these members (3) and (4),
Fill the terminal pipe (2) with a predetermined sweetfish caking repair liquid (5) through the supply pipe (2a) while exhausting it through the waste removal pipe (2h), and after filling, fill it with a second pipe (2tx). (Close 2 scoops.

Next, as shown in Figure 2, the front and rear seal resistance members (3L
After slightly advancing the chew (4), insert the chew (6) in the reverse direction and bring the reversed part (6a) into close contact with the back surface of the rear resistance member (4) to prepare for repair work. It's all set. In Fig. 2, (7) is a lid that closes the starting end opening of the pipe (1), and the uninverted part of the tube (6) freely passes through this so as to maintain a sealed state. . (8) is a supply pipe for supplying pressurized fluid, such as compressed air, to the inside of the lid (7).

When compressed air is supplied into the supply pipe (8) and the pipe M (1) in the state shown in FIG.
) moves toward the front, and as it moves, the lining of the tube (6) C6k> (see Figure 3) is formed in the conduit (1), and the front and rear resistance members (3), (4) The repair liquid (5) also moves within the pipe (1) as the reversing part (6a) moves, and at this time, the repair liquid (5) has a resistance that is commensurate with the pipe circular movement resistance of the front resistor (3). pressure is applied.

Then, as shown in Fig. 3, the repair liquid (5) enters the pipe (
When reaching the repair point (1), for example, the corrosion hole (11), the liquid (5) is under pressure, so it will naturally close the corrosion hole (6).
This press-fitting fills the rear resistance member (4).
The process ends when it passes through the corrosion hole αυ.

Immediately after passing through the rear resistance member (4), that is, after press-filling the liquid agent (5) into the corrosion hole Ql, the inverted portion of the tube (6a
) passes through and lines the pipe (1) with a tube! 5 (66)
is formed. Therefore, the inside of the pipe (1) of the corrosion hole αυ is
Since it is immediately blocked by the lining #) (6b) after filling the liquid, even if underground water pressure is applied from the outside of the pipe (1), the filling liquid (5a) will not close to the pipe (1). 1)
There is no danger of being swept away. Also at this time, pipe (1)
The inside becomes a pressurized area, but due to blockage of the lining (6b),
There is also no risk of blowing out of the pipe (1). Therefore, the filled state of the filling liquid agent (5a) can be stably and reliably maintained as it is.

In this way, by continuing the circular movement of the liquid agent (5) between the tube reversing part C64), the front and rear resistance members (3), (4), and other members, the pipe The inner surface of the pipe line (1) can be lined (6k) while the liquid agent (5) is press-filled into each repaired location in (1).

After filling the repaired part of the pipe (1) with the liquid (5) and lining the tube, solidify the filling liquid (5a) while maintaining the pressurized state inside the pipe (1). By curing, the repair of pipe (1) is completed. Filling liquid (5a
) may be cured at room temperature or by active heating using heated air supplied via pipes.

After the repair of the conduit (1) is completed, the lining of the tube remains on the inner surface of the conduit (1). This tube lining may be left as is, but in the case of power pipes, etc., it is desirable to restore the current diameter, so as much as possible, line the inside of the pipe as shown in Figure 4. It is desirable to peel it off and collect it. This collected tube can be reused for the next repair work.

In the present invention, the pipe resistance value of the front resistance member (3) can be set from a wide range, but if the set value is too small, the filling pressure of the liquid agent will be insufficient, and even if it is too large, the filling company will If it becomes unreasonably large, it is difficult to expect much improvement in the repair effect, so it is usually selected appropriately from a range of about 0.1 to 10 kq/c4, taking into account groundwater pressure and the like.

Liquid agent (5) between the front and rear resistance members (3), (4) and the second member
) is conveniently moved in terms of equipment and operation by using the fluid pressure supplied to the pipe line (1) for reversing the tube. As shown in the figure, the towing rope (9) and the winding cylinder inch α0 may be used to tow and move from the front side. In this case, the traction force (9) freely passes through the front resistance member (4), is connected to the rear resistance member (4), and is connected to the rear resistance member (4).
4) so that pressure can be applied to the liquid agent (5) to fill the repaired area. Of course, such fluid pressure and the traction force of the traction valve may be used together.

When the rear resistance member (4) is towed and moved by the traction operation (9), the tube is reversed as the rear resistance member (4) moves in a conduit, so the reversal speed of the tube is Although it is not necessary to specifically control the tube reversal speed, when moving the rear resistance member (4) using fluid pressure for reversing the tube, a brake is applied to the feeding of the uninverted portion of the tube, thereby controlling the reversal speed of the tube and the It is preferable to control the moving speed of the rear resistance member (4) in the conduit.

The magnitude of the fluid pressure for reversing the tube is such that if it exceeds the tensile strength of the tube, there is a risk that the tube will burst in the repaired area, and if it is below groundwater pressure, it will prevent groundwater from entering the repaired area. Therefore, it is preferable that the tensile strength of the tube is lower than the tensile strength of the tube and higher than the groundwater pressure. The tube can be made of rubber or other flexible and elastic plastic, and if the tube is to be peeled off and recovered, a tube made of polyethylene with good peelability is suitable.O Liquid agent used for repairing pipes Various known materials can be used, but in the case of construction below the groundwater level, underwater curing two-component reaction epoxy resin, water-curing two-part reaction urethane resin, and quick-setting cement are recommended. The system is suitable.

According to the method of the present invention, a chewy lining is formed on the inner surface of the pipeline after the repair liquid is injected into the repaired area, which prevents groundwater from entering from the repaired area and prevents pressurized fluid from flowing into the pipeline. All blowouts are prevented by the lining stew. Due to the function of this lining tube, the repair liquid press-fitted into the repaired area can be solidified while keeping the filling state stable and true, increasing the reliability of this type of repair method. .

[Brief explanation of drawings]

Figures 1 and 2 are longitudinal sectional views showing the preparation process of the method of the present invention, Figure 3 is an enlarged view of the main parts showing the repair situation, and Figure 4 is an enlarged view of the main parts showing the state of tube separation. It is. In the figure, (1) is the pipe, (2) is the terminal pipe, (3), (
4) is a seal resistance member, (5) is a repair liquid, and (6) is a chewable material. (that's all)

Claims (1)

[Claims] (1) An inverted portion of a tube that is inserted inverted and lined from the starting end side of the buried pipeline, a pair of front and rear seal resistance members installed in the starting end of the buried pipeline, and the like. With the solidifying repair liquid sealed and filled in the pipes between them connected in series, the pipes are forcibly moved from the starting end to the terminal end with the front resistance member at the beginning. A method for repairing a buried pipeline, characterized by press-filling a repair liquid into the repaired area, and forming a tube lining in the pipeline following the press-fitting.