Strength characteristics of expansive soil considering effect of hydrous state

LI Xiong-wei; KONG Ling-wei; GUO Ai-guo; ZHANG Yong

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Strength characteristics of expansive soil considering effect of hydrous state

更新时间：2026-06-25

- Strength characteristics of expansive soil considering effect of hydrous state
- Vol. 29, Issue 12, (2008)
- 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,武汉,430071
  2. 常州工学院土木建筑工程学院,江苏,常州,213002
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411
- Online First：11 August 2013，
  
  Published：2008
- 稿件说明：
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LI Xiong-wei, KONG Ling-wei, GUO Ai-guo, et al. Strength characteristics of expansive soil considering effect of hydrous state[J]. 2008, 29(12).
DOI：

LI Xiong-wei, KONG Ling-wei, GUO Ai-guo, et al. Strength characteristics of expansive soil considering effect of hydrous state[J]. 2008, 29(12). DOI：

摘要

从膨胀土水化作用时间和温度两个影响因素出发，在室内研究了膨胀土的膨胀变形特性与强度特性。结果表明，膨胀土饱和后还会经历相当长的膨胀过程，这就使得土体的饱和强度随水化作用时间的延长而逐渐降低；膨胀土在膨胀过程中，温度越高，土体的膨胀速率越大，土体最终的膨胀率也越大，土体的饱和强度随水化作用温度的升高而逐渐降低。饱和膨胀土的抗剪强度指标宜考虑水化作用时间和温度的影响，采用变动强度公式更为合适。

Abstract

Considering two effects of hydration time and temperature

the swelling deformation and strength characteristics of expansive soil are studied through the laboratory test. The results show that the swelling process of expansive soil after saturation could even still continue for quite a long time

which makes the strength of saturated soil gradually reduced with the extended hydration time. Moreover

during the swelling process of expansive soil

the higher the hydration temperature is

the greater the swelling rate and ultimate swelling ratio are

which results in the strength of saturated soil gradually decreasing with the increasing of hydration temperature. Therefore

the shear strength parameters of saturated expansive soil should consider the effects of hydration time and temperature; and a more suitable formula for expressing the variable shear strength is proposed.

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