| 摘要 |
PROBLEM TO BE SOLVED: To prevent a damage of pipe owing to friction, an impact, etc., of a pipe surface by providing piping in a ditch excavated in a ground and interposing a piping spacer having a support receiving portion covering at least a lower wall surface of upper piping and an upper wall surface of lower piping. SOLUTION: Piping 1, 2 is provided in parallel each other and branch piping 3 branched from the piping 2 laterally extends below the piping 2 so as to across the piping 2. In this case, a half-split piping spacer 5 having a support receiving portion covering a lower wall surface of the upper piping 1 is attached on the lower wall surface of the piping 1. Whereas a half-split spacer 6 having a support receiving portion covering an upper wall surface of the lower piping 3 is attached to a lower wall surface. A movement of both piping spacers 5, 6 is adjusted such that they exist at a cross position of the pipings 1, 3 and after both pipings 1, 3 are retained at a predetermined space, a soil, a sand, etc., are back filled to complete the construction work. Thereby, a damage caused by a friction, an impact, etc., at a surface of the piping 1, 3 crossing is prevented.
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