不同饱和度下膨胀土原位孔内剪切试验及强度响应特征

罗晓倩; 孔令伟; 鄢俊彪; 高志傲; 田升奎

doi:10.16285/j.rsm.2023.0141

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不同饱和度下膨胀土原位孔内剪切试验及强度响应特征

基础理论与实验研究 | 更新时间：2026-06-28

- 不同饱和度下膨胀土原位孔内剪切试验及强度响应特征
- 不同饱和度下膨胀土原位孔内剪切试验及强度响应特征
- 岩土力学 2024年45卷第1期页码：153-163
- 作者机构：
  
  1. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室
  2. 中国科学院大学
  3. 桂林理工大学广西岩土力学与工程重点实验室
- 作者简介：
- 基金信息：
  
  国家重点研发计划(No.2019YFC1509901)~~
- DOI：10.16285/j.rsm.2023.0141
  中图分类号： TU443
- 网络首发：2024-01-10，
  
  纸质出版：2024
- 稿件说明：
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罗晓倩, 孔令伟, 鄢俊彪, 等. 不同饱和度下膨胀土原位孔内剪切试验及强度响应特征[J]. 岩土力学, 2024,45(1):153-163.

罗晓倩, 孔令伟, 鄢俊彪, et al. 不同饱和度下膨胀土原位孔内剪切试验及强度响应特征[J]. 2024, 45(1): 153-163.
罗晓倩, 孔令伟, 鄢俊彪, 等. 不同饱和度下膨胀土原位孔内剪切试验及强度响应特征[J]. 岩土力学, 2024,45(1):153-163. DOI： 10.16285/j.rsm.2023.0141.

罗晓倩, 孔令伟, 鄢俊彪, et al. 不同饱和度下膨胀土原位孔内剪切试验及强度响应特征[J]. 2024, 45(1): 153-163. DOI： 10.16285/j.rsm.2023.0141.

摘要

膨胀土强度随饱和度变化显著，非饱和膨胀土的抗剪强度一直是研究膨胀土工程问题的关键。选取南阳市某高速路沿线边坡膨胀土为研究对象，进行了天然条件下处于不同饱和度状态的膨胀土原位孔内剪切试验，获得了自然条件下膨胀土的抗剪强度随饱和度的变化特征。膨胀土的抗剪强度、黏聚力、内摩擦角随着膨胀土饱和度的增大而逐渐减小。结合现场试验数据和土-水特征曲线，提出了以法向应力、饱和度为变量和以法向应力、基质吸力为变量的两种非饱和膨胀土的抗剪强度计算模型，并结合试验数据对计算模型的适用性进行了验证。与之前常用的非饱和土抗剪强度计算模型相比较，提出的两种计算模型所需的拟合参数少，适用于更宽吸力范围、不同法向应力条件下非饱和膨胀土抗剪强度的计算，且结果更为准确。

Abstract

The strength of expansive soil undergoes significant changes with saturation

and understanding the shear strength of unsaturated expansive soil is crucial for studying engineering problems related to this type of soil. This paper focuses on the expansive soil found along a highway in Nanyang City. In-situ borehole shear tests are conducted on the expansive soil under different saturation levels in its natural state

providing insights into the shear strength characteristics of expansive soil under natural conditions. The results show that as the saturation of expansive soil increases

the shear strength

cohesion

and internal friction angle gradually decrease. To calculate the shear strength of unsaturated expansive soil

two models are proposed in this study. The first model considers normal stress and saturation as variables

while the second model incorporates normal stress and matrix suction as variables. These models are developed based on field test data and the soil-water characteristic curve. The accuracy and applicability of the models are verified using the test data. Compared to commonly used shear strength calculation models for unsaturated soils

the two new models require fewer fitting parameters. They are applicable to calculating the shear strength of unsaturated expansive soils with a wider range of suctions and different normal stresses. Additionally

the results obtained using these models are more accurate.

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references

李新明,贾亚垒,王志留,尹松.原状膨胀土剪切力学特性的应变速率效应[J].岩土力学,2022(12).

闫奇,李义衡,许誉浩.含水率对非饱和土抗剪强度试验研究[J].河南城建学院学报,2020(01).

安然,孔令伟,黎澄生,郭爱国.确定残积土原位G-γ衰减曲线的建议方法与适宜性分析[J].岩土力学,2018(12).

李晶晶,孔令伟,穆坤.膨胀土原位孔内剪切试验与强度响应特征[J].岩土力学,2017(02).

张俊然,孙德安,姜彤.吸力历史对非饱和弱膨胀土力学性质的影响[J].岩土力学,2015(11).

杨果林,滕珂,谢兰芳.膨胀土强度的室内直剪和原位推剪对比试验研究[J].中南大学学报(自然科学版),2014(06).

孔令伟,李雄威,郭爱国,张勇.脱湿速率影响下的膨胀土工程性状与持水特征初探[J].岩土工程学报,2009(03).

孔令伟,陈建斌,郭爱国,赵艳林,吕海波.大气作用下膨胀土边坡的现场响应试验研究[J].岩土工程学报,2007(07).

缪林昌,仲晓晨,殷宗泽.膨胀土的强度与含水量的关系[J].岩土力学,1999(02).

Yan Junbiao,Kong Lingwei,Wang Juntao.Evolution law of small strain shear modulus of expansive soil: From a damage perspective[J].Engineering Geology,2023.

Zhong Han,Sai K. Vanapalli,Wei-lie Zou.Simple Approaches for Modeling Hysteretic Soil Water Retention Behavior[J].Journal of Geotechnical and Geoenvironmental Engineering,2019.

Yujie Wei,Xinliang Wu,Jinwen Xia,Gerald A. Miller,Chongfa Cai,Zhonglu Guo,Hassanikhahc Arash.The effect of water content on the shear strength characteristics of granitic soils in South China[J].Soil & Tillage Research,2019.

Elham Amiri Khaboushan,Hojat Emami,Mohammad Reza Mosaddeghi,Ali Rrza Astaraei.Estimation of unsaturated shear strength parameters using easily-available soil properties[J].Soil & Tillage Research,2018.

John P. Malizia,Abdul Shakoor.Effect of water content and density on strength and deformation behavior of clay soils[J].Engineering Geology,2018.

Ujwalkumar D. Patil,Anand J. Puppala,Laureano R. Hoyos,Aravind Pedarla.Modeling critical-state shear strength behavior of compacted silty sand via suction-controlled triaxial testing[J].Engineering Geology,2017.

Lingwei Kong,Hossain Md. Sayem,Huihui Tian.Influence of drying–wetting cycles on soil-water characteristic curve of undisturbed granite residual soils and microstructure mechanism by nuclear magnetic resonance (NMR) spin-spin relaxation time (T2) relaxometry[J].Canadian Geotechnical Journal,2017.

N. Khalili,M. H. Khabbaz.A unique relationship for χ for the determination of the shear strength of unsaturated soils[J].Géotechnique,1998.

AL Öberg,G Sällfors.Determination of Shear Strength Parameters of Unsaturated Silts and Sands Based on the Water Retention Curve[J].Geotechnical Testing Journal,1997.

S K Vanapalli,D G Fredlund,D E Pufahl,A W Clifton.Model for the prediction of shear strength with respect to soil suction[J].Canadian Geotechnical Journal,1996.

Jean-Marie Fleureau,Siba Kheirbek-Saoud,Ria Soemitro,Said Taibi.Behavior of clayey soils on drying–wetting paths[J].Canadian Geotechnical Journal,1993.

J. K. M. Gan,D. G. Fredlund,H. Rahardjo.Determination of the shear strength parameters of an unsaturated soil using the direct shear test[J].Canadian Geotechnical Journal,1988.

Fredlund Delwyn G.,Morgenstern Norbert R..Stress State Variables for Unsaturated Soils[J].Journal of the Geotechnical Engineering Division,1977.

A. W. Bishop,G. E. Blight.Some Aspects of Effective Stress in Saturated and Partly Saturated Soils[J].Géotechnique,1963.

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