LOAD MEASURING METHOD FOR EXISTING ANCHOR AND RE-TENSING METHOD FOR EXISTING ANCHOR

摘要

PROBLEM TO BE SOLVED: To realize the purpose of enhancing work efficiency at the time of load measurement, re-tensing thereafter, and re-fixation, and enhancing the reliability of the work, without being followed by structure complication, etc.;SOLUTION: Re-tensing bolts 28 are screwed on separate three positions out of screw holes 12a in a support head 12 fixedly locked on a tension member 16, with the re-tensing bolts 28 capable of pulling the tension member in a direction that tenses the tension member by screwing into the screw holes, while a load cell 34 is disposed on each re-tensing bolt 28 so that it can be pinched by each re-tensing bolt concurrently with the screw-in of the re-tensing bolt 28. The tension member 16 is pulled by the screw-in of each re-tensing bolt 28 relative to the screw holes 12a in the support head. The total of measurement values by the respective load cells 34 is measured and acknowledged as a fixed load or re-tensing load of an existing anchor, with the measurement values obtained by measurement at the time point when the support head is raised by a prescribed amount in company with the tension member.;COPYRIGHT: (C)2007,JPO&INPIT