Numerical Investigation to Mitigate Train-Induced Ground Vibrations Using Dual Open or Geofoam-Infilled Barriers
摘要
The current study explored the potential to mitigate train-induced ground vibrations using dual open and infilled barriers. On-site measurements have been conducted along the Patna-Buxar railway line in India to examine the effect of the train movement-induced vibrations on the adjoining residential areas. Different post-processing analyses were performed on the three-directional recorded velocities for the qualitative and quantitative assessment of the vibration characteristics. Thereafter, a detailed parametric investigation has been performed using finite element approach to assess the isolation effectiveness of dual open and geofoam-infilled barriers. Lastly, the noble design recommendations are formulated for dual open and geofoam-infilled barriers to screen 75% of the vertical vibrations. The optimum depth of 0.7LR and 0.8LR (where LR is Rayleigh wavelength) were noted for dual open and geofoam-infilled barriers to screen 75% of vertical vibrations. The Arias intensity was found to reduce by 95.3% for geofoam-infilled dual barriers of a depth of 0.9LR. Dual barriers were observed to provide enhanced wave attenuation over a single barrier by confining refracted long-wavelength waves within the space between the barriers.