| 摘要 |
<p>PURPOSE:To secure water permeability easily and facilitate melting regeneration treatment in an underground buried material marker for letting workers know the presence of buried material at the time of drilling the ground by providing overlapped parts in the longitudinal direction, and sewing the overlapped parts with string formed of biodegradable plastic. CONSTITUTION:This underground buried material marker 10 is formed into bellows shape by overlapping a strip sheet 12 partially in the longitudinal direction and sewed with string formed of biodegradable plastic or water soluble plastic in order to fix this shape. The sheet 12 is formed by laminating cloth and a film with the name of buried material, words and phrases, marks, and the like to attract attention, printed thereon in order to call workers' attention thereto to prevent the damage of the buried material and using olefin group resin such as polyethylene. After sewing string is disintegrated or dissolved in the buried state, holes 14... are formed in the traces of the vanished string, and water permeability can be secured by these holes 14.</p> |
