Ground track response behaviour induced by train speed using seismic wave method

Abstract

Ground track response analysis is an alternative method utilized to investigate the influence of ground-borne vibrations induced by speed train on track. This study intended to get an understanding about the responsive of ground towards vibration induced from moving train. To facilitate this study, non-destructive seismic wave method was performed using new application, Sirius M instrument to identify the peak vertical acceleration generated at various running speed and track locations. The result shows the vertical acceleration data signalized from transition wave generate through passing Electric Train Service (ETS) with maximum 140km.hr−1 speed train is higher than commuter with 120km.hr−1 speed train which are 1.935m.s−2 and 1.051m.s−2 respectively. Analysis of vertical acceleration data based on different track locations corresponding to the ETS speed resulting higher peak acceleration at stable track, KM21 compared to settlement susceptible track, KM20.75 which are 6.565m.s−2 and 1.935m.s−2 respectively. The values obtained from this study indicated ground-borne vibration influenced by speed of train and different type of embankment foundation. This data can be used to assess the influences of train type and speed. Moreover, this on-site ground response measurement is potentially useful as an alternative method to determine the soil stiffness which provide an indication to the possible problematic ground susceptible to the settlement.