Determination of soil transfer function through FWD measurements

This paper deals with the results of in situ vibration measurements carried out in the new branch of Linea B1 of the Metropolitana di Roma. A Falling Weigth Deflectometer (FWD) was used to determine the tunnel and soil characteristics and the transfer function between tunnel and surface buildings. The identified model has allowed the prediction of vibration levels produced by the transit of test trains at variable speeds.