西北地质2026，Vol.59Issue(2)：32-45,14.DOI:10.12401/j.nwg.2025112
黄土高原刺槐根土复合体单剪特性及形变模型研究
Study on Single Shear Characteristics and Deformation Modeling at the Root-Soil Interface of Robinia Pseudoacacia in the Loess Plateau
摘要
Abstract
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 engi-neering governance contradiction of"ecological improvement vs.disaster intensification"in ecological restora-tion 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 quanti-fied 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 re-search provides essential data and theoretical support for ecological restoration in rapid slope stability assess-ments that incorporate vegetation factors.关键词
黄土滑坡/根土界面/单剪试验/力学强度/形变模型Key words
loess landslide/root-soil interface/single shear test/mechanical strength/deformation model分类
天文与地球科学引用本文复制引用
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[J].西北地质,2026,59(2):32-45,14.基金项目
自然资源部地质灾害智能监测与风险预警工程技术创新中心开放基金项目(TICGM-2025-10),国家重点研发计划资助项目(2023YFC3008401),国家自然基金面上项目(42177346、42477204),陕西省青年基金项目(2024JC-YBQN-0299、2023-JC-QN-0288),陕西省重点研发计划项目(2025SF-YBXM-292)联合资助. （TICGM-2025-10）
