RAINWATER FEED PIPING STRUCTURE FOR RAINWATER STORAGE AND PERMEATING FACILITY

摘要

PPROBLEM TO BE SOLVED: To provide a rainwater feed piping structure for a rainwater storage and permeating facility which allows rainwater to smoothly flow into the rainwater storage and permeating facility, and prevents an oil content from flowing into the facility to a possible extent. PSOLUTION: The rainwater feed piping structure functions to feed rainwater flowing in a water storage pit into the rainwater storage and permeating facility embedded in the ground, and is formed of a first pipe line, a coarse filter device, and a second pipe line. The first pipe line has an inlet which opens horizontally or downward at a vertical intermediate location of the water storage pit for rainwater stored in the water storage pit, and once rises upward from the inlet and then lowers toward an outlet arranged at a location lower than the inlet. The coarse filter device receives the rainwater discharged from the outlet of the first pipeline, and filters coarse contaminants in the rainwater. The second pipe line leads the rainwater filtered by the coarse filter device and removed in the coarse contaminants to the rainwater storage and permeating facility. PCOPYRIGHT: (C)2009,JPO&INPIT