| 摘要 |
<p>PURPOSE: To securely repair a pipe buried underground with a simple operation by digging a vertical hole to bare the part of a pipe buried underground to be repaired, and filling up a mixture of soil and seal agent to seal the part to be repaired. CONSTITUTION: A vertical hole 13 is dug in the soil 10 to bare the pipe 12 to be repaired. A mixture 14 of soil and sands and seal agent is then put into the vertical hole 13 to fill it up. The soil dug out from the vertical hole 13 or sands separately prepared may be used for the mixture 14. The pipe 12 to be repaired is thus airtightly repaired by hardening of the mixture 14 covering on the pipe 12.</p> |
