Research on the Stability of Subgrade Slopes of Root-Soil Composite Based on Discrete Element Software

DOI

10.2991/978-94-6463-902-5_13How to use a DOI?

Keywords

High-fill roadbed slope; root-soil composite; discrete element analysis

Abstract

With the rapid development of China’s economy, the scale of transportation network construction continues to expand. In the construction of expressways, slope engineering formed by high filling and deep excavation has become an important research topic. This study focuses on the mechanical response mechanism of plant-based soil consolidation and slope protection, systematically explores the soil consolidation mechanism of herbaceous plant roots, and establishes a simplified model of slope root-soil composites through discrete element software to study the protective effect of plant roots on subgrade slopes under different influencing factors. The study found that increasing the distribution density of plants can effectively inhibit the maximum displacement of soil particles. Under the same slope ratio and density conditions, the deeper the root system, the more significant the inhibition effect — the maximum displacement in the plain soil state is 0.58m; when the root depth is 15cm and 20cm, the maximum displacement decreases to 0.4m and 0.33m respectively (with inhibition rates of 31% and 43% respectively); when the root depth is 25cm and 30cm, the maximum displacement further decreases to 0.27m and 0.23m respectively (with inhibition rates of 53% and 60% respectively). Among them, the inhibition effects of the 15-20cm depth group and the 25-30cm depth group show similar characteristics respectively.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Lei Gu
AU  - Xiaofei Zhazng
AU  - Xiangyang Wang
AU  - Haoyu Chen
AU  - Ziyi Liang
PY  - 2025
DA  - 2025/12/16
TI  - Research on the Stability of Subgrade Slopes of Root-Soil Composite Based on Discrete Element Software
BT  - Proceedings of the 2025 7th International Conference on Civil Engineering, Environment Resources and Energy Materials (CCESEM 2025)
PB  - Atlantis Press
SP  - 121
EP  - 128
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-902-5_13
DO  - 10.2991/978-94-6463-902-5_13
ID  - Gu2025
ER  -