Abstract:In this paper, a two-dimensional contour plot of relative acceleration is drawn through outdoor experiments, and the area division is carried out according to the vibration of soil around pile. Furthermore, the changes of soil vibration area around single pile with different geometric size are analyzed. The results show that there are vibration strengthening areas in front of and on both sides of the single pile, and the vibration strengthening phenomenon in front of the pile is stronger, especially at the pile corner. With the ratio of pile length to wavelength in a range of 0.109-0.840, the areas of vibration isolation zone and reflection zone increase greatly, while the area of diffraction zone decreases rapidly; when the ratio increases from 0.840 to 0.962, the areas of vibration isolation zone, reflection zone, and diffraction zone change little. The ratio of pile diameter to wavelength has a great influence on the vibration area around the pile. As the ratio increases from 0.013 to 0.163, the areas of vibration isolation zone and reflection zone increase by 0.249 m2 and 0.129 m2, respectively, while the area of diffraction zone decreases by 0.088 m2. The ratio of source distance to wavelength has a great influence on the area of vibration isolation zone and reflection zone. When the ratio is in the range of 0.163-0.961, the areas of vibration isolation zone and reflection zone decrease rapidly; when the ratio is in the range of 0.961-1.068, the change trend tends to be gentle, and the area of diffraction area only increases by 0.037 m2.