Assessment of High-Speed Train-Induced Vibrations Using Efficient Numerical Models

Application of expanded polystyrene (eps) geofoam for the mitigation of dynamic vibrations and distress of civil infrastructure

“…The beneficial role of the proposed mitigation approach is obvious in this case, as the decibel level is reduced at the whole examined frequency range. The As it was aforementioned, when implementing EPS (e.g., as the ones are shown in Figure 4.9) as embankment filling material revealed that the complete replacement of the soil with EPS increased significantly -up to five times-the vertical displacements of the embankment (Lyratzakis et al, 2019). On the other hand, as illustrated in Figure 4.19, the optimal placement of a limited number of EPS46 blocks on the inclined part of the embankment did not alter the vertical displacement levels compared to the initial geostructure.…”

“…Since the developed numerical model can accurately replicate field data, it can be further expanded to include the proposed mitigation measures. The main aim of the present chapter is to propose an efficient mitigation EPS-based approach capable of reducing the HST-induced vibrations in HSR cuttings as a continuation of the successful application of EPS blocks in HSR embankments, as presented in Chapter 4 (Lyratzakis et al, 2019(Lyratzakis et al, , 2020(Lyratzakis et al, , 2021b(Lyratzakis et al, , 2021c. For this purpose, the EPS use has been investigated both in cutting slope and as filling material of a trench between the track and the slope.…”