RESULTS OF LONG-TERM MEASUREMENT RELATED TO PRESTRESSING FORCE IN PERMANENT GROUND ANCHOR

Abstract

Measurement of prestressing force in permanent ground anchors, which was used in order to prevent the building from floating by the lift of ground water or in case of an earthquake, was carried out over the long period of time. When the prestressing force of 60 years after was presumed based on the measurement result, the effective prestressing rate was set from 0.84 to 0.95, and was around 0.9. As a result of comparing the calculated value and measurement value, it was found that the adoption value at the time of a design was appropriate.