초록 ▼

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

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.

대표청구항 ▼

A method of retensioning the development length of pre-tensioned strands embedded in and bonded to the concrete of an elongated, prestressed concrete member comprising the steps of: (1) exposing any unexposed ends of said pre-tensioned strands at one end of the prestressed concrete member, (2) cover

A method of retensioning the development length of pre-tensioned strands embedded in and bonded to the concrete of an elongated, prestressed concrete member comprising the steps of: (1) exposing any unexposed ends of said pre-tensioned strands at one end of the prestressed concrete member, (2) covering said one end of said concrete member with a plate having holes therein through which the ends of said pre-tensioned strands can pass, (3) applying retaining wedges between the ends of said pre-tensioned strands and said plate, and (4) retensioning each pre-tensioned strand by applying a predetermined amount of tension to the end of each such strand and maintaining said tension between the end of said pre-tensioned strand and said plate by said retaining wedges.