JPS5817859B2 - How to repair underground pipe leaks - Google Patents

Description

[Detailed Description of the Invention] Conventionally, in order to repair leaks in underground pipes such as sewage pipes, grout is press-fitted into the underground pipes and the water leaks outward through the leaks. Leaking grout is often cured around the outside of the leak.

However, according to this, although it is possible to repair water leaks that are large enough for grout particles to pass through easily, small leaks that are difficult to pass through, such as minute cracks, cannot be repaired because the grout does not leak.

The present invention proposes a repair method that can repair even such minute cracks very easily, and the illustrated embodiment in which the method is applied to a sewer pipe will be described in detail below.

Sewer pipes 1, which are underground pipes, are sequentially connected in series and buried underground to form a series of sewer channels 3 connecting manholes 2 on the upstream side and manholes 2' on the downstream side. , one of the sewer pipes 1 had a leak.

Suppose that

Therefore, the upstream and downstream sides of the sewer pipe 1 are closed by expanding the air paralysis 4, 4' inside them, and the above-ground vacuum pump 5
As a result, a vacuum is created through the air hose 6 passing through one air packer 4'.

Then, the graft is pumped to the outer periphery of the sewage pipe 1 evacuated in this way through the graft injection pipe 7 that penetrates underground.

Therefore, the pressure-fed graft spreads along the outer circumferential surface of the sewer pipe 1 to the lower side thereof, and because the inside of the sewer pipe 1 is vacuumed, it also seeps into minute cracks. After reaching the required degree of hardening, apply an air paralysis force of 4,4'
The grout is contracted and extracted from the sewer pipe 3 to clean the inside of the sewer pipe 1 soaked with grout, so that even minute cracks can be accurately repaired.

Note that the tube may be closed using an appropriate method other than air paralysis.

[Brief explanation of the drawing]

The drawings are explanatory diagrams showing one embodiment of the present invention. 1... Sewage pipe that is underground pipe, 4,4'...
... Air para force to close the pipe, 5 ... Vacuum pump, 7 ... Grout injection pipe.

Claims (1)

[Claims] 1. The method is characterized in that the upstream and downstream sides of the underground pipe are closed to create a vacuum in the closed section, and grout is infiltrated from the outside of the underground pipe into the water leakage point in the closed section. How to repair leaks in underground pipes.