| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rear face injection water cut-off method capable of achieving efficient and secure water cut-off processing on (1) a place where many water leakage cracks are present to high density, (2) a place (a rock pocket, a honeycomb) where water leaks from a gap of a structure of concrete, and (3) a place where a water leakage path cannot be specified, the places being incompletely processed by conventional techniques.SOLUTION: There is provided a rear face injection water cut-off method including the processes of: forming an injection hole penetrating from a top surface to a reverse surface of a concrete structure; injecting a water cut-off agent into the injection hole; and forming a water cut-off film, formed by hardening the water cut-off agent, between the reverse surface of the concrete structure and covered soil in contact with the reverse surface. The water cut-off agent is hardened by being diffused radially around an exit of the injection hole along the reverse surface by utilizing water present on the reverse surface of the concrete structure.</p> |
