Method and apparatus for retensioning prestressed concrete members

摘要

A method and apparatus for retensioning the development length of strands of an elongated prestressed concrete member is provided in which the ends of the strands are exposed, a metallic plate having tapered holes therein is placed over the ends of the strands, retaining wedges are inserted into the tapered holes of the plate to grip the ends of the strands, and a predetermined amount of tension is applied to the strand and maintained in the strand by the retaining wedges. A jack is provided to apply the tension to the strand. The prestressed concrete members such as piling, may be spliced together by using the apparatus on adjoining ends of piling.