| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely provide a protection function even in the case of being touched with the drilling part of a construction machine by laminatedly arranging a protection sheet material constituted out of material capable of softening impact force from the drilling member of a construction machine on the outer surface of pipe material and sliding the extreme end of the drilling member. SOLUTION: A protection sheet material 2 is provided on the circumferential face part on the buried position of a pipe buried in the earth and constituted out of polyethylene resin. The protection sheet material 2 is constituted out of a tape or cloth woven with fiber made of synthetic resin such as polyethylene or polypropylene, and by weaving into a plurality of layers or laminating single layers, arranged on the outer circumferential face of a pipe, and it is fixed by a band member. Further not only the protection sheet material 2, but a display sheet 4 for warning existence of a pipe line is integratedly placed on the surface of the protection sheet material positioned on the uppermost part of it, and it is fixed together with the protection sheet 2 by the band member or the like.</p> |
