| 摘要 |
The present invention relates to a sealed repair method for underground buried pipe joints and damaged parts, and is characterized by sequentially comprising ; a process of injecting a primary injection material with a prescribed primary pressure under a condition where a gap of underground buried pipe joints or damaged parts is sealed with a sealing plate of a conventional self-propelled or towing type of injection apparatus; and a process of construction having almost no gap or a drastically reduced gap by curing a primary injection material for more than a pot life after the process ; and a process of injection at a prescribed secondary pressure higher than the primary pressure or a pressure higher than a reference value for water-tight tests using a secondary injection material with a relatively lower viscosity compared with the primary injection material or without particles after the process; and a process of construction in a sealed condition having no gap by curing the secondary injection material for more than a hardening time after the process; and a process of completing sealed repairs of the underground buried pipe joints or damaged parts. Therefore, The present invention is very useful in that water leakage occur at less than a reference value, or repair is made to a condition without leakage due to complete sealing with construction under a condition having no gap at underground buried pipe joints even if a water-tight test is conducted. [Reference numerals] (AA) Washing and drying of underground buried pipe; (BB) Injection of primry injection material; (CC) Curing of primary injection material; (DD) Injection of secondary injection material; (EE) Curing of secondary injection material; (FF) Completion of sealed repairs |
