TEMPORARY ANCHORAGE DEVICE FOR PRETENSIONED HOLLOW GIRDER TRANSVERSELY FASTENING PRESTRESSING STEEL, AND ANCHORING METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a temporary anchorage device which facilitates removal of an anchorage grip after placing and hardening of inter-girder concrete even if sufficient tensioning force is applied to a transversely fastening prestressing steel before placing the inter-girder concrete at the time of construction of a pretensioned hollow girder bridge. SOLUTION: According to the structure of the hollow girder bridge in which the transversely fastening prestressing steel 7 is arranged in a manner penetrating a filled cross sectional area (transverse girder) of the hollow girder 2 at right angles to a bridge girder, a temporary fastening fixture 15 is fitted in a gap between an anchor plate 10 and the anchorage grip 14 arranged on the transversely fastening prestressing steel 7 passed through a hole 11 formed in the anchor plate 10 and withdrawn from the girder. The temporary fastening fixture 15 is formed by screwing an internal threaded sleeve 21 onto an external threaded sleeve 19 with a nut 16 to advance and retreat. COPYRIGHT: (C)2006,JPO&NCIPI