| 摘要 |
PURPOSE: A mold for manufacturing a manhole is provided to prevent the transformation by atmospheric pressure and the inflow of underground water at installation work, to simplify installation work and to cut down the maintenance cost. CONSTITUTION: The mold for manufacturing a manhole contains: a base plate having a projection(51) and an inner slope(52); an internal plate(40) hinged on the inner front of the base plate by many hinges(50a) to be fixed upward and provided with a nut fastening space(42) closed by a nut fastening space securing cap(43) and a reinforcing slope(44) formed on the extension line of the inner slope(52); an external plate(30) hinged on the outer front of the base plate by many hinges(31) to be fixed upward; a hinge wing(30a) hinged on both fronts of the base plate by many hinges(30b) to be fixed upward; and hinge wings(10) hinged on both ends of the base plate by many hinges(13,23) to be fixed upward and provided with a pair of waterproofing packing projections(12,22) and many bolt holes(11,21).
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