| 摘要 |
<p>PURPOSE:To make it easier to bury pipes over a long distance by a method wherein a curved pipe line is divided into a plurality of spans, and a sleeve pipe, into which a wire is inserted, is laid in each of the spans, and the sleeve pipes are connected together and thereafter steel pipes are buried, while an excavator is being pulled from a starting shaft. CONSTITUTION:Temporary vertical shafts 31, 32, 33, 34 are installed between a starting shaft 41 and an arrival shaft 42 along a curved road to form a plurality of spans. Thereafter, a sleeve pipe 11 made of polyethylene pipe or the like, into which a pulling material string 3 comprising a wire rope or the like is inserted, is laid in each apan by a small-diameter pipe jacking method, and the pipes 11 are connected together to interconnect the shaft 41 and the shaft 42. And an excavator 10 is pulled by a pulling device 4 from the shaft 41 so that the ground is excavated by the excavator together with the pipes 11, thereby joining steel pipes 7 to lay them underground, wherein the string 3 is wound up by a winch 12, whereby the string 3 can be pulled over a long distance without being subjected to frictional resistance due to earth pressure. As a result, a curved pipe can be easily buried.</p> |
