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<p>Experimental investigations were conducted to examine the vibration screening potential of dual-infilled trenches filled with different materials. The vibrations were induced using a mechanical oscillator in a regulated frequency range varying from 20 to 45&#xa0;Hz, stepped up in 5&#xa0;Hz. The data was recorded in the absence and presence of dual trenches using uniaxial accelerometers. Different combinations of materials (stiffer and softer) to the surrounding soil, such as aggregate, sand-crumb rubber, and geofoam, were filled in the dual barriers. The findings indicated that the combination of aggregate (stiffer than the surrounding soil) in the first trench and geofoam (softer than the surrounding soil) in the second trench produced the maximum screening efficiency among the studied combinations. The maximum screening efficiency was noted to be 84%. A reduction of up to 16 decibels in the vibrations was noted in the presence of dual-infilled trenches. The study suggested that dual trenches, incorporating aggregate and geofoam, offered an enhanced performance over traditional barriers in mitigating ground vibrations.</p> Graphical Abstract <p></p>

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Experimental Approach to Ground Vibration Mitigation using Dual Barriers-Filled with Different Materials

  • 期刊论文

  • 发表日期：

    2026年3月21日

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  • Saurav Kumar,
  • Nitish Jauhari,
  • Raja Kumar,
  • Pradipta Chakrabortty

摘要

Experimental investigations were conducted to examine the vibration screening potential of dual-infilled trenches filled with different materials. The vibrations were induced using a mechanical oscillator in a regulated frequency range varying from 20 to 45 Hz, stepped up in 5 Hz. The data was recorded in the absence and presence of dual trenches using uniaxial accelerometers. Different combinations of materials (stiffer and softer) to the surrounding soil, such as aggregate, sand-crumb rubber, and geofoam, were filled in the dual barriers. The findings indicated that the combination of aggregate (stiffer than the surrounding soil) in the first trench and geofoam (softer than the surrounding soil) in the second trench produced the maximum screening efficiency among the studied combinations. The maximum screening efficiency was noted to be 84%. A reduction of up to 16 decibels in the vibrations was noted in the presence of dual-infilled trenches. The study suggested that dual trenches, incorporating aggregate and geofoam, offered an enhanced performance over traditional barriers in mitigating ground vibrations.

Graphical Abstract