This paper presents an improvement to the traditional wave impeding block(WIB)bar-rier by introducing a double-layer WIB with the same overall thickness.The investigation focuses on the isolation effect of the double-layer WIB on S-waves in an unsaturated soil foundation,Using wave theory in unsaturated porous and elastic media.Based on Helmholtz's principle,the vertical displacement at the ground surface under S-wave incidence after the installation of the double-layer WIB in an unsaturated foundation was derived and obtained.The study initially ana-lyzed the influence of the material parameters of the double-layer WIB on its vibration isolation performance.It was found that the optimal vibration isolation effect could be obtained by adjus-ting the density and shear modulus of the double-layer WIB.Subsequently,the vibration isolation effects of double-layer WIB were compared with those of a single-layer homogeneous WIB com-posed of the same material.The analysis included examining the influences of various physical and mechanical parameters,such as incident angle,frequency,saturation,thickness,and buried depth of the WIB on its vibration isolation performance.Results indicated that for WIBs of the same thickness,the double-layer WIB exhibited significantly higher vibration isolation efficiency,49.18％and 42.59％higher than that of the corresponding single-layer WIB with the same materi-al properties.The double-layer WIB demonstrated an effective vibration isolation effect across low,medium,and high frequencies in environmental vibrations.The double-layer WIB has a good vibration isolation effect on environmental vibration at low,medium,and high frequencies.
double-layer wave impeding blockenvironmental vibrationisolation effectunsatu-rated soilamplitude attenuation ratio
万方数据
维普
