| 摘要 |
PURPOSE: A corrugated perforated drain pipe for drainage is provided to ensure rigidity against external pressure and structural stability because a reinforcing part has a ribbed structure. CONSTITUTION: A corrugated perforated drain pipe for drainage comprises a core member(10) and filtration felt(20). The core member is formed into a hollow cylinder pipe with corrugation and includes one or more reinforcing parts(30) formed lengthwise. The reinforcing part has an open top and a protruded bottom wherein the depth of the protrusion is greater than the height(h) of the corrugation of the core member. The filtration felt covers the exterior of the core member. |
