WATER PERMEATION METHOD FOR MANHOLE, WATER PERMEATION STRUCTURE FOR MANHOLE

摘要

PROBLEM TO BE SOLVED: To provide a water permeation method for a manhole and water permeation structure for a manhole capable of avoiding such as an accident of water overflowing from the manhole even in a heavy rainfall. SOLUTION: An outflow opening of an upstream pipe line and an inflow opening of a downstream pipe line facing the outflow opening are provided at the wall face of a manhole formed of a pit and the outflow opening of the upstream pipe line is connected to the inflow opening of the downstream pipe line through a groove-formed invert to construct a manhole water permeation structure. Joint pipes are arranged respectively in the outflow opening of the upstream pipe line and the inflow opening of the downstream pipe line. Mutual joint pipes are connected by connection pipe having the same sectional area with a pipe constituting the upstream pipe line and the downstream pipe line. COPYRIGHT: (C)2005,JPO&NCIPI