Stressdependency of the (sand)subgrade modulus by the dead weight of the pavement layers : fieldexperiments with the falling weight deflectometer

In situ deflection measurements can be used for the backcalculation of the moduli of the distinguished pavement layers. Sand is an unbound granular material and therefore its modulus ought to be stress-dependent. This dependency is rarely noticed when Falling Weight Deflection (FWD) ...