Based on the theory of wave propagation in single-phase elastic medium and unsaturated porous medium and Snell's law

the propagation characteristics of P1 wave incidence on wave impeding block (WIB) from unsaturated soil are studied. The analytical solution of the amplitude ratio of reflected wave and transmitted wave of P1 wave passing through the wave impeding block in unsaturated soil is derived. The relation curves of amplitude ratios of reflected wave and transmitted wave with the shear modulus and density of the wave impeding block

angle of incident wave

frequency of incident wave

saturation and other parameters are analyzed

thus the influence laws of these parameters on the vibration isolation effect of the wave impeding block in unsaturated soil are obtained. The numerical results show that the shear modulus and density of the wave impeding block significant affect its vibration isolation effect

and the wave impeding block can achieve better vibration isolation performance when the shear modulus and density of the wave impeding block are within a certain range. The incident angle has a great influence on the vibration isolation performance of the wave impeding block

while the incident frequency has little influence on the vibration isolation performance.