| 摘要 |
A form for manufacturing a concrete manhole is provided to cut down on maintenance expenses by simplifying installation, assemblage and manipulation, to prevent strain deformation of a manhole after placing concrete and to manufacture a manhole more simply. A form for manufacturing a concrete manhole contains: an outer frame mold formed in the shape of a cylinder composed of the upper half plane(11) having concrete injection grooves(11h) and the lower half plane having plural projections with hinge holes, wherein the upper half plane is coupled to the lower half plane to be rotatable by coupling a rod passed through the hinge hole to the upper half plane; several ring-type partition walls(13) fixed to the lower half plane of the outer frame mold to split the inside of the outer frame mold; an inner frame mold(20) inserted to the outer frame mold and formed in the shape of a cylinder as a curved plate having elasticity; and a fastener member inserted to the inner frame mold, extended to compress the inner frame mold to the partition wall and composed of a fastening plate bent in the shape of a ring to make both ends meet and a fastening part composed of a hinge whose one end is hinged to be rotatable and other end is fixed on both ends of the fastening plate and a bolt coupled with a nut through a fastening hole of the hinge. |
