| 摘要 |
<p>PURPOSE:To eliminate a controversial point of correlation to superficies of the cut-and- cover method by constructing a shaft by enveloping a buried object, pressing in a lead pipe and a propulsive pipe equal to or larger than the buried object along it, destruction-removing the buried object in the vicinity of the lead pipe and thereafter drawing out the propulsive pipe and the lead pipe to a shaft side while filling solidifying agent. CONSTITUTION:A shaft 2 is constructed by enveloping a buried pipe 1 to remove it in the inside of the shaft 2, and next, a lead pipe 7 and a propulsive pipe 8 in size equal to or larger than the buried pipe 1 are concentrically set up with the buried pipe 1. The buried pipe 1 is destructed in the vicinity of the lead pipe 7, while pressing in the lead pipe 7 and the propulsive pipe 8 by a propulsive jack 9 along the buried pipe 1, and successively removed, and a partition 10 is mounted in the front part of the lead pipe 7 after completion of removal. The propulsive pipe 8 and the lead pipe 7 are drawn out to a side of the shaft 2 while injection charging a charge part 16, after the buried pipe is removed, with a solidifying agent by an injection pump 15 from an injection hole 13 provided in the partition 10. By the above method of construction, insufficiency of destructive strength by a rock auger and a controversial point to superficies of the cut-and-cover method are eliminated.</p> |
