| 摘要 |
<p>PURPOSE: To easily further quickly impede leakage of gas from a gas flow pipe receiving cut damage by a pavement cutter. CONSTITUTION: In a gas leakage emergency impeding method, an injection nozzle 4a of a cylinder 4 receiving urethane foam is made to appear in a cut damage part 2a of a supply pipe 2 through a cut groove 1c of a pavement layer 1b cut in by a cutter blade of a pavement cutter, to inject the urethane foam 5 from this injection nozzle 4a into the cut damaged part 2a, so as to close the cut damaged part 2a of the supply pipe 2 by foaming the injected urethane foam 5 solidified.</p> |
