Centrifuge modelling of ground vibrations mitigation by inclined geofoam barrier

This paper presents a centrifuge study on the performance of inclined geofoam barriers compared to a vertical geofoam barrier for the mitigation of ground vibrations induced by high-speed railways. Three different barrier inclinations (60°, 90° and 120°) are used in three centrifuge models. Each centrifuge model is tested for seven different frequencies. Therefore, the results of 21 centrifuge tests are reported in this paper. The results show that the barrier efficiency (BE) of inclined barriers is greater than the vertical BE for the points located behind the barrier. However, for a point located before the barrier, the BE reduces by using inclined barriers instead of the vertical barrier. The results also illustrate that the barrier efficiencies for the two inclined barriers used in this research, which have supplementary angles, are almost the same.