CULVERT DRAIN PASSAGE FOR ROAD

摘要

PURPOSE: A culvert drain passage for a road is provided to prevent the introduction of a landslide with a filter structure to facilitate the drainage of the culvert drain passage. CONSTITUTION: A hollow hole consists of an upper surface(22), an inner surface(25) and side walls. The hollow hole rotating in a spiral manner is integral with an attach support having drain holes(27) at the inner surface to form a culvert drain passage. An outer wall having drain holes is formed to attach a side surface formed at the half height of the hollow hole to a melting support at the upper surface having a half height of the side walls in an integral manner.