| 摘要 |
PROBLEM TO BE SOLVED: To provide a sewerage manhole which contributes to mitigation of flood damage. SOLUTION: The sewerage manhole connects an inflow pipe 5 to an outflow pipe 6 and has an invert 9 on the bottom. The sewerage manhole has a partition wall 12 installed on the side of the outflow pipe 6 of the manhole so as to form an orifice 16 in a lower portion between the invert 9 and the partition wall, and so as to allow rainwater to overflow its upper portion, to thereby impart a rainwater storage function to the manhole. COPYRIGHT: (C)2005,JPO&NCIPI
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