To provide a construction method of a buried pipe capable of laying regardless of the length of the buried pipe, when installing the buried pipe of a road including the hard ground such as base rock.
This invention relates to the construction method of the buried pipe by the following processes: (1) the process of crushing the hard ground above an installation position of the buried pipe in a shape without hindering installation, (2) the process of performing up to temporary restoration on the same day, by easily paving, by temporarily filling up an excavation hole finished with crushing by a backfilling material such as a crushed stone, (3) the process of performing up to temporary restoration similar to the above process on the same day to the excavation hole finished with its crushing, by crushing the hard ground of a position continuing with the excavation hole of the process of (2) in a predetermined shape, and (4) the process of performing up to restoration on the same day, by paving with a paving material, by backfilling the periphery and an upper part of the buried pipe by protective sand and the backfilling material, by integrally connecting with a previously laid buried pipe, by laying the buried pipe in a predetermined position, by digging up a part temporarily restored in the above process, when the total extension of a crushed part reaches the expected buried pipe length, by repeating the processes of (1) to (3).
COPYRIGHT: (C)2008,JPO&INPIT
Hiroshi Onuki
Osamu Yokoyama
Kazuhisa Tamura
Kudo Tadanuki
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