DRAINAGE SYSTEM FOR STORM WATER AND METHOD OF CONSTRUCTING THE SAME

摘要

Disclosed is a rainwater drainage system including a rainwater line which is a space comprising a rainwater receiver installed in a road and a waterproof means linearly installed in the lower side of the rainwater receiver; a flow block enabling rainwater to flow inside the space of the rainwater line while supporting the space of the rainwater line; and a network of a sewer pipe or a rainwater pipe connected to the space of the rainwater line by a connection pipe. The connection pipe is able to be a form connecting a sewer manhole of the sewer network and a rainwater line manhole connected to the rainwater line space. A backflow preventing valve or a cutoff valve can be installed in the connection pipe. A method for constructing the system in an existing road includes: an excavation step; a step of removing a rainwater receiver of the existing road and backfilling a borehole of a rainwater receiver connection pipe formed in an existing sewer pipeline; a waterproof sheet installation step; a flow block installation step; a step of installing the rainwater receiver connected to the flow block; a waterproof sheet finishing step; and a backfill and road pavement step. According to the present invention, the rainwater drainage system is capable of partly supplementing the lack of design capacity of an existing rainwater drainage system and facilitating the maintenance of the rainwater drainage system, thereby reducing the risk of local flooding caused by a concentration rainfall in a civic center.