STUDY ON THE ESTIMATING METHOD FOR GROUND ANCHORS’ TENSION FOCUSING THE DISTRIBUTION OF SURFACE STRESS ON THE BEARING PLATE

Abstract

 In this study, the estimating method for ground anchors’ tension were considered using X-ray stress measurement to measure the surface stress on the bearing plate which is one of the constituted member of the ground anchor. In investigate about the relationship between the tension and the surface stress on the bearing plate, at first, the way that three dimensional finite elements method was used, and, these relationships were revealed by using strain gages. The second, formulations that estimate ground anchors’ tension were made from using these strain gages’ results. At last, correcting functions were derived to match measuring data between using the X-ray and strain gages, and that formulations were completed to include these functions. As a result, ground anchors’ tension were estimated within about 15% accuracy from measuring the surface stress on the bearing plate if the thickness is 20mm.