STONE FILTERING SYSTEM INSTALLED AROUND DRAIN DITCH OF A ROAD FOR FILTERING FINE FOREIGN MATTERS INFLOWED INTO DRAINED WATER BY COMBINING A STONE AND A GRAVEL

摘要

Purpose: inflow is arranged to prevent water pollution and accident into drained water by a kind of stone filter system for filtering fine foreign matter in conjunction with stone and gravel, by from the outflow or pollutant that limit sand in draining in the rain and draining rainwater after the separation of impurity. Construction: a kind of stone filter system is installed in an open drain around a road or a pavement, is made of regular stone and gravel (1) and a convolution adhesive (2). Fine particles and foreign matters are filtered off, and rainwater is energetically drained by stone filter system. Convolution adhesive is melted at high temperature, be uniformly applied in high temperature wind-force and vibration invested with stone and spread gravel in. Gravel and stone are compressed in framework, are compressed to sewage and to filter impurity. The individual foreign matters of stone filter system, which enter draining from rainwater flow, prevents water pollution.