Prestressed stay cable for use in cable-stayed bridges

Bridges – Suspension – Towers and anchors

Patent

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Details

52223L, E01D 1100

Patent

active

048378852

ABSTRACT:
A cable-stayed bridge. At least one vertical bridge tower supported by a pier is used in conjuction with a horizontal traffic-supporting deck having a cable girder beneath it and supporting it. A plurality of cable stays, are each anchored to the upper end of the tower and extend at an angle to and through the deck and are anchored to the cable girder. Each stay is prestressed and comprises an inner cable group of greased strands enclosed in an inner rigid structural pipe and an outer cable group of cemented grouted strands outside the inner pipe and enclosed by an outer rigid structural pipe. This outer rigid structural pipe surroundings the outer cable group and is separated therefrom by cement grouts. Each cable group has anchors for its extreme upper end and for its extreme lower end. Prestressing is done between the extreme ends to a desired tension.

REFERENCES:
patent: 4449855 (1984-05-01), Langwadt
patent: 4473915 (1984-10-01), Finsterwalder
patent: 4484425 (1984-11-01), Muller
patent: 4742591 (1988-05-01), Muller

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