Study on shear bands of undisturbed loess under plane strain

ZHAO Kai; SHAO Shuai; SHAO Sheng-jun; WEI Jun-zheng; ZHANG Shao-ying; ZHANG Yu

doi:10.16285/j.rsm.2022.0447

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Study on shear bands of undisturbed loess under plane strain

更新时间：2026-06-25

- Study on shear bands of undisturbed loess under plane strain
- Vol. 44, Issue 2, Pages: 433-441(2023)
- 作者机构：
  
  1. 西安理工大学岩土工程研究所,陕西,西安,710048
  2. 西安理工大学陕西省黄土力学与工程重点实验室,陕西,西安,710048
  3. 中铁第一勘察设计院集团有限公司,陕西,西安,710043
  4. 西安工业大学建筑工程学院,陕西,西安,710021
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2022.0447
  CLC： TU444
- Online First：17 February 2023，
  
  Published：2023
- 稿件说明：
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ZHAO Kai, SHAO Shuai, SHAO Sheng-jun, et al. Study on shear bands of undisturbed loess under plane strain[J]. 2023, 44(2): 433-441.
DOI：

ZHAO Kai, SHAO Shuai, SHAO Sheng-jun, et al. Study on shear bands of undisturbed loess under plane strain[J]. 2023, 44(2): 433-441. DOI： 10.16285/j.rsm.2022.0447.

摘要

针对黄土地区工程建设中的平面应变问题，使用改进的西安理工大学真三轴仪进行了不同侧向固结压力、不同含水率下原状黄土的平面应变剪切试验，得出了剪切破坏时剪切带倾角试验值，根据应力-应变关系曲线求出了剪切带倾角的Mohr-Coulomb、Roscoe理论解，分析了相应控制因素下原状黄土强度、剪切带破坏模式与倾角的变化。结果表明：应力-应变曲线随含水率、侧向固结压力的增大从原生软化型向次生硬化型转变；剪切带破坏模式随侧向固结压力的增大依次呈现单一剪切带、锥型剪切带和X型剪切带；随着含水率的增大，黏聚力、内摩擦角减小导致Mohr-Coulomb剪切带倾角减小，剪胀作用增强导致Roscoe剪切带倾角增大；随侧向固结压力增大，动内摩擦角增大及剪胀作用增强，导致Mohr-Coulomb、Roscoe剪切带倾角增大。

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Related Institution

School of Civil Engineering, Chang’an University

Shaanxi Provincial Key Laboratory of Loess Mechanics and Engineering

Regional Geological Survey Academe of Shaanxi Geology and Mining Group Co., Ltd.

School of Geological Engineering and Surveying, Chang’an University

Key Laboratory for Geo-hazards in Loess Area of Ministry of Land and Resources, Xi’an Center of Geological Survey, China Geological Survey

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