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Study on Single Shear Characteristics and Deformation Modeling at the Root-Soil Interface of Robinia Pseudoacacia in the Loess Plateau
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Qi GU1, 2, 3, Juan MA4, *, Xiaopeng GUO1, 2, 3, Jun JIA1, 2, 3, 4, 5, Wei FENG1, 2, 3, Tao XIAO6, Ning REN6, Chao DU7
Northwestern Geology | 2026, 59(2) : 32 - 45
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Northwestern Geology | 2026, 59(2): 32-45
Study on Single Shear Characteristics and Deformation Modeling at the Root-Soil Interface of Robinia Pseudoacacia in the Loess Plateau
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Qi GU1, 2, 3, Juan MA4, *, Xiaopeng GUO1, 2, 3, Jun JIA1, 2, 3, 4, 5, Wei FENG1, 2, 3, Tao XIAO6, Ning REN6, Chao DU7
Affiliations
  • 1Xi'an Center of China Geological Survey, Xi'an 710119, Shaanxi, China
  • 2Key Laboratory for Geo-hazard in Loess Area, Ministry of Natural Resources, Xi'an 710119, Shaanxi, China
  • 3Observation and Research Station of Geo-hazards in Loess Plateau, MNR, Xi'an 710119, Shaanxi, China
  • 4Technology Innovation Center for Geohazard Monitoring and Risk Early Warning, Ministry of Natural Resources, Beijing 100081, China
  • 5State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China
  • 6Department of Geology, Northwest University, Xi'an 710069, Shaanxi, China
  • 7Geological Survey Academy of Inner Mongolia Autonomous Region, Hohhot 010041, Inner Mongolia, China
Published: 2026-04-20 doi: 10.12401/j.nwg.2025112
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The superimposed effects of extreme rainfall events and engineering disturbances in the Loess Plateau have led to a significant increase in the risk of shallow loess landslides. This situation reveals the engineering governance contradiction of "ecological improvement vs. disaster intensification" in ecological restoration projects. This study focuses on the mechanical properties of the root-soil interface of Robinia pseudoacacia. Through methods including in-situ testing, single shear test, and theoretical analysis, we systematically quantified the multi-field coupling effects of moisture content fluctuations, root topological types, and variations in root content on the shear strength evolution of the root-soil interface. The results indicate: ① Vegetation roots in the shear strength characteristics of the root-soil interface. The shear process can be divided into three stages: initial linear elastic deformation, damage accumulation, and progressive failure. ② The stress-strain curves of the root-soil interface can be categorized into softening and hardening types, with the softening type comprising a strength-increasing phase followed by a strength-decaying phase. ③ A predictive model considering the stress-strain softening of the root-soil interface was proposed, demonstrating favorable predictive performance. This research provides essential data and theoretical support for ecological restoration in rapid slope stability assessments that incorporate vegetation factors.

loess landslide  /  root-soil interface  /  single shear test  /  mechanical strength  /  deformation model
谷琪, 马娟, 郭小鹏, 贾俊, 冯卫, 肖涛, 任宁, 杜超. 黄土高原刺槐根土复合体单剪特性及形变模型研究. 西北地质, 2026 , 59 (2) : 32 -45 . DOI: 10.12401/j.nwg.2025112
Qi GU, Juan MA, Xiaopeng GUO, Jun JIA, Wei FENG, Tao XIAO, Ning REN, Chao DU. Study on Single Shear Characteristics and Deformation Modeling at the Root-Soil Interface of Robinia Pseudoacacia in the Loess Plateau[J]. Northwestern Geology, 2026 , 59 (2) : 32 -45 . DOI: 10.12401/j.nwg.2025112
Appendix
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Year 2026 volume 59 Issue 2
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Article Info
doi: 10.12401/j.nwg.2025112
  • Receive Date：2025-05-30
  • Online Date：2026-09-16
  • Published：2026-04-20
Article Data
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History
  • Received：2025-05-30
  • Revised：2025-08-27
  • Accepted：2025-08-28
Affiliations
    1Xi'an Center of China Geological Survey, Xi'an 710119, Shaanxi, China
    2Key Laboratory for Geo-hazard in Loess Area, Ministry of Natural Resources, Xi'an 710119, Shaanxi, China
    3Observation and Research Station of Geo-hazards in Loess Plateau, MNR, Xi'an 710119, Shaanxi, China
    4Technology Innovation Center for Geohazard Monitoring and Risk Early Warning, Ministry of Natural Resources, Beijing 100081, China
    5State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    6Department of Geology, Northwest University, Xi'an 710069, Shaanxi, China
    7Geological Survey Academy of Inner Mongolia Autonomous Region, Hohhot 010041, Inner Mongolia, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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