The Use and Validation of Measured, Theoretical, and Approximate Point-Load Solutions for the Prediction of Train\cbox{-}Induced Vibration in Homogeneous and Inhomogeneous Soils

Lutz Auersch
2014 International Journal of Acoustics and Vibration  
The layered soil is calculated in the frequency wavenumber domain and the solutions for fixed or moving point or track loads follow as wavenumber integrals. The resulting point load solutions can be approximated by simple formula. Measurements yield the specific soil parameters for the theoretical or approximate solutions, but they can also directly provide the point-load solution (the transfer function of that site). A prediction method for the train-induced ground vibration has been
more » ... has been developed, based on one of these site-specific transfer functions. The ground vibrations strongly depend on the regular and irregular inhomogeneity of the soil. The regular layering of the soil yields a cut-on and a resonance phenomenon, while the irregular inhomogeneity seems to be important for high-speed trains. The attenuations with the distance of the ground vibration, due to point-like excitations such as vibrator, hammer, or train-track excitations, were investigated and compared. All theoretical results were compared with measurements at conventional and high-speed railway lines, validating the approximate prediction method. Figure 1. Emission, transmission, and immission of ground-borne vibration; the separation of the three parts of the prediction of railway induced vibration.
doi:10.20855/ijav.2014.19.1335 fatcat:mzdkz25aarci7kswufnf2wktbi