# Study on Disturbance Mechanism of Squeezed and Non-Squeezed Soil Piles on Soft Soil Foundation
## 4 Results  
### Disturbance Effects of Hydrostatic Pile  
(1) Dynamic response characteristics of soil displacement fields during the pile driving process  
Figure 6 shows the distribution of horizontal displacement of soil in the depth direction when the horizontal distance from the pile center is 10R. The penetrating procedure is divided into ten steps, with result files saved after each step. As the pile penetrates, the horizontal displacement increases with steps, during which the curves exhibit an L-shape at first and then change to S-shape. The distribution of horizontal displacements in the depth direction of soil is shown in Figure 7. From close to far, the horizontal displacement caused by the penetration of the hydrostatic pile gradually decreases. In the depth direction, the displacement curve displays an S-shaped distribution pattern, namely, large in the shallow part, average in the middle, and small in the lower part. As the horizontal distance from the pile center increases, the S-shaped curve progressively flattens. As for the vertical displacement field, Figure 8 depicts the distribution of vertical displacement with depth at 10R from the pile center, where the disturbance at the surface is the greatest, and the vertical displacement increases progressively with increasing penetration depth and tends to be constant. When the pile tip reaches a particular depth, the vertical deformation of the soil at that depth begins to increase substantially and then tends to be flat. Figure 9 shows the distribution of vertical displacement in the horizontal direction at different depths, where the vertical displacement is concentrated within a horizontal  
Figure 5: The construction process of the bored pile. distance of 5 m from the pile center and decreases substantially with increasing distance, roughly following a logarithmic curve. Figure 6: Horizontal displacement distribution in the depth direction at x = 10R. Figure 7: Horizontal displacement distribution in the depth direction at different horizontal distances. (2) Dynamic response characteristics of soil stress field during the pile driving process  
Figure 10 presents the variation of horizontal stress at a depth of half the pile length with the penetration. The horizontal stress varies slightly at each horizontal distance as the hydrostatic pile penetrates from the surface z = 0 to the depth z = 6 m. After z = 6 m, the soil stress increases as the horizontal distance from the pile center decreases. The stress diminishes and is maintained at a stress level that is greater than the natural stress. Figure 11 depicts the distribution of horizontal and vertical stresses of the soil at different depths along the horizontal direction after the completion of pile penetration. The curves of the horizontal and vertical stresses show similar trends. Near the pile, both the horizontal and vertical stresses show similar trends. The horizontal and vertical stresses show similar trends. Near the pile, both the horizontal and vertical stresses show similar trends. The horizontal and vertical stresses show similar trends. Near the  
Figure 8: Vertical displacement changes with penetration depth at x = 10R. Figure 9: Vertical displacement distribution in the horizontal direction at different soil depths. and vertical stresses have a significant increase. As the distance from the pile increases, the disturbance effect of the pile on the soil gradually weakens, and the stress drops and remains steady at a certain level. In general, the disturbance of the horizontal stress is more significant than that of the vertical stress. (3) Range of pile disturbance  
Figure 12 shows the variations in the elastic-plastic region of the pile during the driving process. It can be observed that the pile tip is always in the plastic development zone, and the surface soil undergoes continuous plastic deformation during the driving process.