| 摘要 |
A method of producing a prestressed continuous concrete product, according to which method mould units (2) are connected one after another to form a sequence of moulds (1) and the moulds are provided with prestressing wires (10), whereafter the sequence of moulds is displaced below a concrete supply (4) simultaneously as the wires are stressed. The mould units are coupled to form a rigid buckling resistant sequence with standing the traction of the wires and forming a casting bed continuously open in the longitudinal direction of the sequence and extending up to a hardening area of the concrete blank. The rigid sequence of moulds is pushed from the supply end by applying a continuous pushing action only to the last mould of the sequence by means of a displacing device (16) so that the position of the discharge end (7) of the mould sequence can be chosen freely. An apparatus for carrying out the method comprises longitudinally open mould units provided with locking means for interconnection thereof in a rigid, buckling resistant manner. A continuously operated pushing device is positioned before the concrete supply device below the mould sequence. |
