Experimental study of triaxial test of unsaturated soil of Yellow River levee

LI Yong-le; CUI Xiang-yu; ZHANG Hong-fen; SHE Xiao-guang; HOU Jin-kai

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Experimental study of triaxial test of unsaturated soil of Yellow River levee

更新时间：2026-06-25

- Experimental study of triaxial test of unsaturated soil of Yellow River levee
- Vol. 27, Issue S2, (2006)
- 作者机构：
  
  1. 中国科学院武汉岩土力学重点实验室,武汉,430071
  2. 华北水利水电学院,郑州,450008
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：16 December 2006，
  
  Published：2006
- 稿件说明：
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LI Yong-le, CUI Xiang-yu, ZHANG Hong-fen, et al. Experimental study of triaxial test of unsaturated soil of Yellow River levee[J]. 2006, 27(S2).
DOI：

LI Yong-le, CUI Xiang-yu, ZHANG Hong-fen, et al. Experimental study of triaxial test of unsaturated soil of Yellow River levee[J]. 2006, 27(S2). DOI：

摘要

利用特制的非饱和土三轴仪器，模拟实际工程中土体的受力条件，对黄河大堤非饱和土在不同围压条件下的土水特性以及非饱和土的强度进行了试验研究。试验表明：非饱和土基质吸力随着土体周围压力的增大而减小，随着含水率的增大而减小；非饱和土的有效摩擦角值受含水量的影响不大。但总凝聚力受含水率的影响较大，含水率越小，基质吸力就越大，总凝聚力亦越大。根据试验结果，提出了非饱和土的抗剪强度的拟合模型，该模型参数易于确定，与实测结果：拟合误差较小，满足非饱和土的强度计算精度要求。

Abstract

The characteristics of soil and water and shear strength of Yellow River dyke’s unsaturated soil under different confining pressures are studied by using special triaxial apparatus to simulate the real condition exposed on unsaturated soil in engineering. Based on the water-soil curves

it is easy to draw that the matric suction decreases with the increasing of surrounding pressure and water content; the effective friction angle changes little with the changing of water content; but the total cohesion changes greatly. The soil has bigger suction and total cohesion at lower water content. Based on the test results

the model of shear strength of unsaturated soil is presented with clear parameters. The fitting error is small and meets the calculation requirement of shear strength of unsaturated soil.

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