| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a perforated pipe material capable of effectively preventing intrusion of sediment from a slit and capable of easily and effectively preventing clogging of the slit, even in gentle saturated sand deposit requiring liquefaction countermeasures.SOLUTION: A perforated pipe material 1 includes: a slit part 2 in which a plurality of slits 2a are formed; a hollow closing member 4 that can slide on inner surface of the slit part 2 and that is arranged to close all the plurality of slits 2a; and a pipe member 5 that enables pressurized water or pressurized air to be injected into a sediment accumulation part 3 below the closing member 4 through a hollow part of the closing member 4.</p> |
