| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive removable buried pipe with good workability. SOLUTION: A penetration part, which penetrates inward and outward, is provided in a part-to-be-removed of the buried pipe 20, and the buried pipe 20 is broken by means of an excavator in such a manner that the penetration part serves as a starting point. The penetration parts are a plurality of through-grooves 21 or through-holes 22, which penetrate through the inner and outer peripheries of the buried pipe 20. Additionally, a connection part is provided in the part-to-be-removed of the buried pipe 20, and a buried pipe 20b, whose strength is made lower than that of a left pipe 10 at a driving tip, is connected to the connection part. COPYRIGHT: (C)2004,JPO
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