Calculation of effective strength indexes of unsaturated low liquid limit clay

SHEN Xi-zhong; GUAN Xin-jian; LAN Yuan

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Calculation of effective strength indexes of unsaturated low liquid limit clay

更新时间：2026-06-25

- Calculation of effective strength indexes of unsaturated low liquid limit clay
- Vol. 28, Issue S1, (2007)
- 作者机构：
  
  1. 黄河水利科学研究院工程力学研究所,郑州,450003
  2. 中国科学院武汉岩土力学研究所,武汉,430071
  3. 郑州大学环境与水利学院,郑州,450002
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU442
- Online First：28 March 2014，
  
  Published：2007
- 稿件说明：
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SHEN Xi-zhong, GUAN Xin-jian, LAN Yuan. Calculation of effective strength indexes of unsaturated low liquid limit clay[J]. 2007, 28(S1).
DOI：

SHEN Xi-zhong, GUAN Xin-jian, LAN Yuan. Calculation of effective strength indexes of unsaturated low liquid limit clay[J]. 2007, 28(S1). DOI：

摘要

因非饱和土性质的复杂性，需用高精的设备获取相关强度参数，试验难度大，应用受到限制。在分析非饱和土强度理论的基础上，从土的有效应力强度出发，利用常规三轴仪开展不同含水率、干密度组合的黏土CD试验，探讨含水率及干密度对黏土抗剪强度的影响，据此建立考虑含水率（饱和度）、干密度影响的有效应力强度指标计算公式。研究表明，黏土的强度与含水率、干密度密切相关，其中黏聚力、内摩擦角均与含水率（饱和度）呈二次曲线关系，与干密度成线性关系；二者的交互影响可按乘法效应进行组合，研究成果可为工程应用提供参考。

Abstract

Because of complexity about property of unsaturated soil

getting correlative strength parameters needed high and extract equipment

the difficulty is big so that its application is limited. Based on an analysis of strength theory of unsaturated soil

CD test of clay about different combination of water content and dry density is carried out with normal three-axis test. According to the theory of effective strength of soil

the effective strength of clay about water content and dry density is discussed

thus functions of total strength indexes are established that the effect of water content(saturation) and dry density can be considered. Study shows that strength of clay has close connection with water content and dry density. Moreover

the relation between cohesion

internal friction angle and water content(saturation) is conic

the relation between cohesion and dry density is linear

and the mutual effect of the both can be expressed by multiplication. Our research can be used as a reference application of project.

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