| 摘要 |
The present invention relates to a total environmentally-friendly trenchless repairing method including the steps of: checking leakage on the upper and lower portions of the sewage pipeline, a manhole and a household branch pipe within a repairing section; performing partial trenchless repairing for the damaged portion of the pipeline; filling a primary repairing liquid into the pipeline at high pressure; sucking the primary repairing liquid remaining in the pipeline; injecting a secondary repairing liquid into the interior of the pipeline; sucking the secondary repairing liquid remaining in the pipeline; performing intermediate cleaning; and removing the repairing liquids accumulated on the bottom portion of the pipeline. |
