| 摘要 |
<p>PURPOSE:To perform injection without causing cleavage and penetration in a state having the injection pressure higher than ever and improve the charging ratio of a consolidated material formed after injection by injecting a seal agent into the soil around a buried conduit in pulsating state. CONSTITUTION:Into the soil around a buried conduit 1 requiring repair, a polymer material 3 as a seal agent is injected from a discharge hole 8 on the top of an injection rod 6 in an injection device 5, a consolidated material 8 having seal effect is formed together with the soil around the buried conduit 1, and the repair is completed. In this case, the injection device 10 is formed of a liquid tank 10 for receiving the liquid polymer material 4, a pulsation pump connected thereto, and the injection rod 6 connected to the lower stream side of the pump. The injection device 5 is provided with a pressure sensor 14 for detecting injection pressure in the base of the injection rod 6, the detection information is stored in a memory device 5, and the memory device 15 is provided with an injection judgment device 16 for judging whether the pulsating injection is normally conducted or not.</p> |
