Method for repairing leakage of cement drainage pipe by using PE100-grade modified 0-concave-0 lining pipe

Abstract

The invention relates to a repairing method for repairing leakage of a cement drainage pipe by pressing a PE100-grade modified lining pipe from a circular pipe to a concave pipe and then inflating the concave pipe into the circular pipe, and belongs to the technical field of leakage repairing of the cement drainage pipe. According to the repairing method, the circular PE100 lining pipe is firstly pressed into the concave pipe, so that the lining pipe can be conveniently and quickly pulled when entering the cement drainage pipe, and the concave pipe is inflated to recover into the circular pipe after the pulling entering is completed, so that a gap between the lining pipe and the cement drainage pipe is ensured to be very small; the problems that the diameter of the lining PE pipe needs to be made to be much smaller than the inner diameter of the cement drainage pipe in order to reduce the traction difficulty when the lining PE pipe is additionally arranged in an existing cement drainage pipe, arc-shaped deformation with the middle being low and the two ends being high is formed under the conditions that the lining PE pipe is subjected to dead weight, sewage in the pipe and the cement drainage pipe cracks and collapses, and then the pipeline leakage cannot be thoroughly solved due to the fact that the sewage flows into the space between the lining PE pipe and the cement drainage pipe due to cracking of a lining PE pipe opening and a cement drainage pipe opening are thoroughly solved.

Description

technical field [0001] The invention relates to a method for repairing leakage of cement drainage pipes by pressing PE100 lining pipes from circular pipes into concave pipes, and then inflating the concave pipes into circular pipes to repair the leakage of cement drainage pipes. field. Background technique [0002] With the increase of the service life of the underground cement drainage pipes used for urban drainage and sewage, coupled with the interference factors such as the corrosion of the groundwater in the pipes, the operating load of the pipes, the geographical settlement and the underground engineering, etc., the joints of the cement pipes will crack or the pipes will be damaged and leaked. Phenomenon, the conveying function of the cement drainage pipe is lost, and the seepage water will cause soil loss and road surface collapse. At present, the commonly used repair method for damaged cement drainage pipes is to spray repair glue or weld on the leakage point, which ...

AI Technical Summary

Problems solved by technology

[0002] With the increase of the service life of the underground cement drainage pipes used for urban drainage and sewage, coupled with the interference factors such as the corrosion of the groundwater in the pipes, the operating load of the pipes, the geographical settlement and the underground engineering, etc., the joints of the cement pipes will crack or the pipes will be damaged and leaked. Phenomenon, the conveying function of the cement drainage pipe is lost, and the leakage of water will cause soil loss and road surface collapse

At present, the commonly used repair method for damaged cement drainage pipes is to spray repair glue or weld the leak point, which can only be maintained for a short period of time for cement drainage pipes that have been used for a long time, and cannot completely solve the problem of damage and leakage

[0003] In order to solve the above problems, a new method has been proposed for the repair of cement drainage pipes, that is, the cement drainage pipes are lined with PE pipes with certain plasticity, which not only increases the service life of cement drainage pipes, but also strengthens the cement drainage pipes. However, due to the uneven inner wall of the cement drainage pipe and the long distance between the two wellheads, it is difficult to pull the circular PE pipe into the cement drainage pipe, and PE pipes often enter the cement drainage pipe. Half or two-thirds of the PE pipe is stuck, and the traction cannot be continued, resulting in the inability to continue the project. We have to adopt the method of excavating underground cement drainage pipes, which is not only time-consuming and labor-intensive, but also greatly increases the project cost.

Therefore, when using this method, the diameter of the lined PE pipe will be made much smaller than the inner diameter of the cement drainage pipe, so that there will be a large gap between the outer surface of the lined PE pipe and the inner wall of the cement drainage pipe. It is not less than 20 cm, which is convenient for the lined PE pipe to be pulled in the cement drain pipe; although this reduces the difficulty of pulling the lined PE pipe in the cement drain pipe, it will cause the lined PE pipe to be damaged by its own weight, sewage in the pipe, and the cement drain pipe. In the case of rupture and collapse, due to the certain flexibility of the lined PE pipe, the lined PE pipe will form an arc-shaped deformation with the middle lower than the two ends, which will cause the lined PE pipe openings at both ends to shift to the middle, making the lined PE pipe mouth The opening of the cement drainage pipe is cracked, causing sewage to flow between the outer surface of the lined PE pipe and the inner wall of the cement drainage pipe, and the problem of pipeline leakage cannot be completely solved; at the same time, due to the sewage remaining in the middle of the lined PE pipe, As a result, it is necessary to propose a new repair method for repairing the leakage of cement drain pipes

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