Pressure container prestressed concrete or the like

Claim 1

In combination, a pressure container of generally cylindrical shape, prestressing bands peripherally wound on the container on the outer surface thereof in a plurality of turns for producing annular prestressing pressure in the container, said prestressing bands being arranged in a plurality of layers superposed radially one above the other, and anchoring means secured at a plurality of positions on the container for engaging said bands to clamp the same wiTh radial bearing force against the container and for grouping said bands in rows running side by side around the container, said anchoring means comprising clamping and anchoring members extending transversely of said rows of bands and substantially axially along the entire length of the container on the outer surface thereof in circumferentially spaced relation, said clamping and anchoring members each being constituted by anchoring strips including a base strip arranged inwardly of the innermost layer, a pressure strip bearing against the outermost layer of the prestressing bands, clamping strips arranged between the individual layers of the prestressing bands, and clamping bolts attached to said container and extending radially between two adjacent rows of prestressing bands and passing through all the anchoring strips to produce a clamping force directed substantially at right angles to the prestressing force of the prestressing bands and parallel to the bearing force of the particular clamping and anchoring member, the number of layers of the prestressing bands extending in the peripheral direction decreasing in the direction of the height of the container, the outer pressure strip of each clamping and anchoring member comprising strip sections which are adjacent each other in the longitudinal direction and the length of which corresponds to that height of the container wall in which the number of prestressing band layers remains unchanged, and which are, at their upper end, at which they engage somewhat over the lower end of the strip section following in the upward direction, pressed on the said strip section by one of the clamping bolts.