BACKFILLING METHOD FOR BURIED ITEM

摘要

PROBLEM TO BE SOLVED: To obtain a backfilling method for a buried item which method uses a low-cost liquefied soil of a general formulation and enables the formation of an upper layer (e.g. a roadbed) within 2hr after the deposition of the liquefied soil. SOLUTION: In a method for backfilling a buried item 3 buried or constructed under the ground surface, the first liquefied soil layer 1 is formed so as to enclose the item 3; then the second liquefied soil layer 2 comprising a high-early- strength liquefied soil is deposited; and an upper layer (e.g. a roadebed 4) is formed on the second layer 2.