| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an easy-to-apply backfilling method that lessens the effect of earth pressure in a case where there is no rolling compaction or ground displacement, and can reduce damage to a buried pipeline even when ground displacement due to fault displacement occurs. SOLUTION: In the method, a ditch 6 is made in the ground 1, and a pipeline 3 is placed in the ditch 6 and backfilled. In such case, the surrounding of the pipeline 3 in the ditch 6 is backfilled by air mortar A having low compressive strength and fragile, the air mortar A is covered by an air mortar B having higher compressive strength than the air mortar A by back fill, the air mortar B is covered by an air mortar C having higher compressive strength than the air mortar B and mountain sand 2a by backfill, and the air mortar C is covered by mountain sand 2a by backfill.</p> |
