drainge piping sealing structure of foamed concrite layer

摘要

The present invention relates to a drainage piping sealing structure for a foamed concrete layer, which allows moisture contained in a foamed concrete layer formed on a waterproof layer to be discharged to the outside, has an outlet of a connection elbow, to which a drain pipe is connected, in multiple layers to be possible to easily connect the drain pipes even when the drain pipes having different diameters from each other are constructed, and forms a closing part in the connection elbow to prevent foamed concrete from being introduced into a drain hole when placing the foamed concrete.