# Model Test of Dynamic Response of Living Poles Slope Under Train Loads
## 5 Conclusions  
In this paper, we designed and completed the dynamic response model test of the slope supported by living poles under the train load. The distribution of earth pressure, slope displacement response, and the force of living poles under different excitation forcesand different excitation frequencies were compared and analyzed. The main conclusions are as follows.  
1. With the increase of excitation frequency, peak value under excitation, and excitation amplitude, the earth pressure on the embankment slope improve continuously, which reflects that the higher the train speed, the larger the train axle load and the greater the impact load caused by track unevenness, the more significant the dynamic response of the embankment slope is. For the living poles embankment slope in this test, the earth pressure gradually decays along the depth direction, with the rate of decay being faster on the upper and slower on the lower. The attenuation is faster on the surface of the foundation bed and at the bottom of the foundation bed than in the body of the embankment, and the depth mainly affected by the dynamic load is about 0.89 m.
2. The dynamic displacement of the slope surface increases with the raising of the train axle load, and the dynamic displacement of the bed layer is larger than that of the embankment slope body. However, the foundation bed is not suitable for the support of living poles. For the body of the embankment slope, the displacement response of the upper part of the embankment slope body and the position about 1/4 slope elevation from the slope foot is the largest. When the support of living poles is carried out, the support should be strengthened at these two positions.
3. The bending moment of the taproot and the stress of the lateral root increase with the raising of the train axle load, and the stress response of the living pole located at the slope top of the embankment is the largest. By comparing and analyzing the stress amplitudes of the measured points on the lateral root with different distances from the slope surface, it is known that the slope face has an amplification effect on the train vibration load, and the farther away from the track, the smaller the amplification effect is. In addition, due to the presence of lateral roots, the taproot of the living stump had multiple points of contra flexure, and the bending moment of the taproot part between the lateral roots showed a law of larger on the top and smaller on the bottom.  
All authors contributed to this study's conception and design. conceptualization and funding acquisition, X.J.; Investigation, writing--original draft preparation, Z.W.; supervision and validation, H.Y.; data curation and formal analysis, H.W. All authors commented on previous versions of the manuscript. All authors have read and agreed to the published version of the manuscript.  
This study was supported by the Special Projects in Key Fields of Higher Education in Guangdong Province (2023 ZDZX4044), the Special Projects in Key Fields of Higher Education in Guangdong Province (2023 ZDZX4045), the Research Capacity Enhancement Project of Key Construction Discipline in Guangdong Province (2022 ZDJS092), the National Natural Science Foundation of China (3197127), the Forest Science and Technology Innovation Program of Hunan Province (XLK202105-3), and supported by Hunan Provincial Natural Science Foundation of China (2022)J31005).  
Not applicable.  
The original contributions presented in the study are included in the article, and further inquiries can be directed to the corresponding authors.  
The authors declare no conflicts of interest.