| 摘要 |
<p>PURPOSE: To recognize existence of a burried material completely and easily by arranging burried material recognizing earth whose present positioned earth and a color difference are different 1.5 or more, on one or two surface(s) of upper surface, lower surface, and side surface of a burried material, when various kinds of buried materials buried or built under an earth surface are backfilled. CONSTITUTION: A burried material recognizing earth made of backfilled earth whose a present positioned earth and a color difference are different 1.5 or more is prepared, a burried material recognizing earth 15 is arranged on an upper surface part, a lower surface part, and both side surface part which are positioned around a gas pipe 1 which is a burried material, a roadbed 7, and a subgrade 9 are arranged upper the burried material recognizing earth 15, and road pavement 11 is carried out thereon. If the burried material recognizing earth 15 is arranged only on the upper surface part around the gas pipe 1, the amount of the using burried material recognizing earth 15 is economized, the burried material recognizing earth 15 is not only arranged on the upper surface part of the gas pipe 1, but also on the lower surface part thereof, and the burried material recognizing earth 15 exists just under the subgrade 9. Since existence of the burried material is known and failure of the burried material is prevented, it is possible to carry out work safely without spending much manhours and time.</p> |
