UNDERGROUND PIPELINE AND PIPE REST

摘要

PROBLEM TO BE SOLVED: To increase the effectiveness of a refilling pressure by sufficiently filling sand for backfill into clearances between pipes when a plurality of pipes with different diameters are buried in a ground in the pattern of multiple rows and multiple stages. SOLUTION: In this underground pipe buried in an underground, by using pipe rests 12 holdingly supporting the pipes 10 by lower side split members 13A and upper side split members 13B having semi-circular groove-like pipe holding parts 14 on the opposed surfaces thereof, the pipe rests 12 holding the pies 10 are laterally disposed in a plurality of rows, and vertically stacked in a plurality of stages to disposed the plurality of pipes 10 with different diameters in the pattern of multiple rows and multiple stages. The center axes of the vertically disposed pipes 10 are aligned in the vertical direction. Thus the clearances between the pipes 10 can be made equal in the vertical direction.