Estimate of average subgrade moduli using the FWD

This paper deals with the interpretation of falling weight deflectometer data. Using the theory of Boussinesq and that due to Odemark, two quantities are defined in order to interpret the data: effective surface modulus; and effective subgrade modulus. The surface modulus profile serves to identify which sensor readings are suitable for backcalculation, whereas the subgrade modulus profile is used to estimate average subgrade modulus and an …