| In Japan, Ground Anchors are used a lot for slope stability in roads.During the maintenance of ground anchors, anchors requiring detailed further investigation have been evaluated by conducting integrity investigations. The integrity investigations can consist of a prior survey, detailed investigation of the anchor head by investigation of the locking unit arrangement, condition of corrosion protection oil after exposing the anchor head, a lift-off test to confirm anchor residual load, investigation below the bearing plate after removal of the locking unit, performance confirmation test, property test of corrosion protection oil and monitoring of axial force in anchors equipped with a load cell. The Public Works Research Institute and Japan Anchor Association published “Maintenance Manual for Ground Anchors” as result of the collaborations in 2008. This paper describes anchor integrity investigation from this. |
