| 摘要 |
PURPOSE: A reinforcing form for a drainpipe is provided to enhance solidify of a drainpipe and external earth pressure. CONSTITUTION: The reinforcing form for a drainpipe comprises the steps of unifying a fastener(12) on the outside of a spiral pipe with a fusion band(14), placing a form(11) provided with retreated grooves on the lower part of an outer form provided with inlets longitudinally on the upper side, perforating binding openings(13) along the fastener(12) at regular intervals, and fixing a support to the inlets.
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