RAINWATER STORAGE AND PENETRATION FACILITY AND INSTALLATION METHOD FOR RAINWATER STORAGE AND PENETRATION FACILITY

摘要

PROBLEM TO BE SOLVED: To provide a rainwater storage and penetration facility, efficiently securing the storage quantity.;SOLUTION: In this rainwater storage and penetration facility S, a storage and penetration water tank 1 is buried in the ground 81 open cut with a slope 82 to store and penetrate rainwater. The facility includes a lower storage and penetration tank 2 installed on the lower side and an upper storage and penetration tank 3 having a projection part 31 installed on the backfilled earth 7 between a side surface 29 of the lower storage and penetration tank 3 and the slope 82 as the storage and penetration tank 1.;COPYRIGHT: (C)2010,JPO&INPIT