Abstract:In this study, we used an outdoor testing method to draw a two-dimensional contour map, and we normalized the wavelength and double-pile variables to analyze the vibration of the surrounding soil when a Rayleigh wave passes through a double pile. The results show that the vibration in the soil strengthens between and in front of the piles, with the greatest vibration intensity in the soil is between the piles and at the pile angle. Increases in the ratio of the pile length to wavelength strengthen the vibration of the soil between and in front of the piles, and also improve the vibration-isolation effect of double piles. When the ratio is in the range of 0.691-0\^781, the variation range of each point is gentle. An increase in the pile spacing causes double piles to lose their mutual influence. When the ratio of the pile spacing to wavelength is between 0\^34 and 0.42, the Ar value of the soil between, in front of, and behind the piles approaches 1, i.e., there is no vibration strengthening or attenuation. Increasing the pile diameter can improve the vibration-isolation effect of double piles, whereby as the ratio of the pile diameter to the wavelength increases, the Ar values of the soil between and in front of the piles increase slightly. An increase in the distance of the vibration source strengthens the vibration-isolation effect of double piles. As the ratio of the vibration-source distance to the wavelength increases, the Ar value of soil in front of the pile decreases by about 0.13, that between the piles decreases by about 0\^068, and that behind the pile decreases by approximately 0.108. The vibration-isolation effect is also enhanced, but the amplitude of this enhancement is small.
