Method and device for determining the axial force progression in a pressure-grouted anchor

摘要

The method involves providing a clamped pressure-grouted anchor (11) with a cylindrical anchor body, steel tensioning elements (15, 16) and an anchor head. Anchoring forces at different elongated regions of the pressure-grouted anchor are detected by measuring axial expansion of the material of the cylindrical anchor body using a resistance strain gauge. The anchor body is provided with two steel pressure rings that are arranged at distance from each other and an aluminum deformation tube that is connected to the rings. An independent claim is also included for a device for determining axial anchoring force characteristics at a clamped pressure-grouted anchor.