## 3 Analysis of Slope Model Test Results  
### The Variation Law of Vertical Dynamic Ground Pressure  
As depicted in Figure 6a,b, Figure 6a illustrates the vertical dynamic soil pressure curve at a loading frequency of 2 Hz, while Figure 6b displays the maximum dynamic soil pressure under various loading frequencies. When the loading frequency ranges between 2 and 4 Hz, the vertical dynamic soil pressure exhibits a similar sinusoidal pattern in correlation with the crest load. The dynamic soil pressure gradually decreases with increased burial depth, and as the burial depth increases, the peak values of the soil pressure curves become progressively closer to each other. At a loading frequency of 2 Hz, the maximum dynamic soil pressure at point D slightly surpasses that at point C. When the loading frequency is raised to 3 Hz, there is a noticeable increase in the maximum dynamic soil pressure at all measurement points. However, as the loading frequency continues to increase to 4 Hz, the rate of increase in the maximum soil pressure at each point slows down.  
Figure 5: Wooden frame beam–bamboo anchor slope model test front.  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Work Conditions** & **Frequency (Hz)** & **Lower Peak (kN)** & **Peak Difference (kN)** & **Upper Peak (kN)** \\ \hline
1 & 2 & 15 & 14.1 & 29.1 \\
2 & 3 & 15 & 14.1 & 29.1 \\
3 & 4 & 15 & 14.1 & 29.1 \\
4 & 3 & 12.24 & 14.1 & 26.65 \\
5 & 3 & 17.76 & 14.1 & 31.86 \\
6 & 3 & 20.52 & 14.1 & 34.62 \\
7 & 3 & 15 & 11.1 & 25.1 \\
8 Figure 7 illustrates the maximum vertical dynamic soil pressure under various peak-to-peak loadings. With the increase in the peak-to-peak loading, the maximum dynamic soil pressure at points A to D initially experiences a sharp rise. Additionally, for shallower burial depths, the increment in pressure is more significant. Subsequently, while the maximum soil pressure at each point continues to increase with the rise in peak-to-peak loading, the rate of increase at each point diminishes.  
Figure 8 displays the maximum vertical dynamic soil pressure under constant amplitude differential loading. With the increase in the upper peak value, the increments at points A to D are 1, 1.5, 2.5, and 3 kPa, respectively. The curves representing the maximum dynamic soil pressure at each measurement point consistently maintain the lower peak value while adhering to the observed pattern of increment in the upper peak value.  
The vertical dynamic soil pressure curves exhibit a sinusoidal pattern similar to crest loading across all loading conditions. The maximum dynamic soil pressure at each measurement point increases with depth, indicating that in model experiments, stress diffusion may become more apparent as the slope depth increases. Additionally, a significant portion of the force might dissipate due to friction between the slope and the model box. Hence, in engineering practice, as the burial depth decreases, the accuracy of soil pressure calculations tends to improve. When the frequency increased from 2 Hz to 3 Hz, there was a substantial increase in soil pressure; however, with a further increase to 4 Hz, the increase in soil pressure was comparatively smaller. The increase in load also demonstrated a positive  
Figure 6: Vertical dynamic ground pressure at different loading frequencies. (**a**) Vertical dynamic ground pressure at 2 Hz; (**b**) Maximum dynamic ground pressure at different loading frequencies.  
Figure 7: Maximum vertical dynamic ground pressure with different up and down peaks.  
correlation with soil pressure, whether it was an increase in peak-to-peak values or peak value differentials, resulting in a continual increase in maximum dynamic soil pressure.