# Study on Disturbance Mechanism of Squeezed and Non-Squeezed Soil Piles on Soft Soil Foundation
## 4 Results
### Disturbance Effects of Bag Grouting Pile  
(1) Dynamic response characteristics of the soil displacement field during the pile grouting process  
Figure 14 shows the distribution of the soil horizontal displacement in the depth direction when the horizontal distance from the pile center is 10R. When the grouting level rises, the lateral squeeze will occur, causing horizontal displacement of the soil. Figure 15 displays the distribution of horizontal displacements at various horizontal distances in the depth direction. It can be observed that the horizontal displacements induced by the bag grouting pile decrease progressively from near to far, ultimately conforming to a linear distribution law of \"large above and small below\". Figure 16 shows the distribution characteristics of vertical displacement in the soil at various depths in the horizontal direction. It reveals that the maximum vertical deformation of the soil occurs near the pile position and decreases gradually with increasing distance from the pile center, roughly following a logarithmic curve. Additionally, Figure 17 demonstrates that when the pile tip reaches a particular depth during the pile grouting process from deep to shallow, the vertical deformation of the soil at that depth begins to increase substantially and then flattens out. Figure 13: Contour map of additional stress and displacement for the hydrostatic pile. Figure 16: Vertical displacement distribution in the horizontal direction at different soil depths. Figure 14: Horizontal displacement distribution in the depth direction at x = 10R. Figure 15: Horizontal displacement distribution in the depth direction at different horizontal distances. (2) Dynamic response characteristics of the soil stress field during the pile grouting process  
Figure 18 shows the variation of horizontal stress of the soil at different horizontal distances from the center of the pile at a depth of half the pile length. As the grouting level increases, the horizontal stress of the soil increases, and the closer the distance to the pile in the horizontal direction, the more significant the increase in stress. Figure 19 depicts the distribution of horizontal and vertical stresses of the soil at different depths along the horizontal direction after the completion of pile penetration. Near the pile, both the horizontal 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 is maintained at a certain level. It also shows the disturbance of the horizontal stress is more significant than that of the vertical stress. Figure 17: Vertical displacement changes with grouting depth at x = 10R. Figure 18: Horizontal stress at a depth of half the pile length varies with grouting depth. (3) Range of pile disturbance  
Figure 20 shows the variations in the elastic-plastic region of the pile during the grouting process. It can be observed that the pile tip is always in the plastic development zone, while there is no plastic deformation in the surface soil during deep grouting. As the grouting level increases, the bottom hole wall continues to make plastic deformation. Figure 19: Variation characteristics of stress fields in the horizontal direction at different depths: (a) horizontal stress; (b) vertical stress. Figure 20: Elastic-plastic state changes during the process of the bag grouting pile grouting. Similarly, characteristic values of 0.1 kPa and 1.0 mm were chosen to represent the additional stress and deformation of the soil, respectively. The contour map in Figure 21a,b show the distribution of additional stress in the final state, with a disturbance range of 2.2 m and 13.0 m in the horizontal and vertical directions for the additional stress, and 1.0 m and 12.0 m in the horizontal and vertical directions for the additional vertical stress. Furthermore, Figure 21c,d display the final displacement contour map.