THE DRAINAGE SYSTEM OF THE PBD PUBLIC LAW WHICH HAS THE CORE OF A XI UNIFICATION FORM

摘要

One draining board of one PBD structured approaches is arranged to convey energy with excellent water by preventing a drainage from being blocked. One draining board of one PBD structured approaches includes a core (20), it forms a drainage and thoroughly discharges the Interstitial Water of underground, an and filter (30), it covers core and prevents the influx of impurity to the inside of drainage, wherein core includes unidirectional first diagonal member (21) to be formed to be inclined in, second diagonal member (22), it has a symmetrical structure to the first diagonal member, one vertical member (23), in the first diagonal member, it is formed between second diagonal member and next first diagonal member, second diagonal member, to be adhered to drainage with preventing filter tight.