Evaluation of liquefaction flow characteristics and soil state of saturated sand based on tension and compression apparent viscosity

YAO Xiao-fei; CHEN Yu-min; CHEN Run-ze; WANG Zhi-hua; FENG Yi

doi:10.16285/j.rsm.2025.0559

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Evaluation of liquefaction flow characteristics and soil state of saturated sand based on tension and compression apparent viscosity

更新时间：2026-07-06

- Evaluation of liquefaction flow characteristics and soil state of saturated sand based on tension and compression apparent viscosity
- Vol. 47, Issue 6, Pages: 1906-1916(2026)
- 作者机构：
  
  1. 河海大学精细爆破全国重点实验室,江苏,南京,210024
  2. 河海大学土木与交通学院,江苏,南京,210024
  3. 苏州科技大学土木工程学院,江苏,苏州,215011
  4. 南京工业大学城市地下空间研究中心,江苏,南京,210009
  5. 中铁第一勘察设计院集团有限公司,陕西,西安,710043
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2025.0559
  CLC： TU441
- Online First：06 June 2026，
  
  Published：2026
- 稿件说明：
移动端阅览
YAO Xiao-fei, CHEN Yu-min, CHEN Run-ze, et al. Evaluation of liquefaction flow characteristics and soil state of saturated sand based on tension and compression apparent viscosity[J]. 2026, 47(6): 1906-1916.
DOI：

YAO Xiao-fei, CHEN Yu-min, CHEN Run-ze, et al. Evaluation of liquefaction flow characteristics and soil state of saturated sand based on tension and compression apparent viscosity[J]. 2026, 47(6): 1906-1916. DOI： 10.16285/j.rsm.2025.0559.

摘要

针对南海钙质砂、福建标准砂和南京细砂开展了一系列不排水循环三轴试验，提出了拉压表观黏度的概念，研究了不同影响因素下饱和砂土的液化流动特性和物态演变机制。主要结论如下：（）考虑到饱和砂土在加载过程中的剪应力−剪应变率滞回曲线在拉伸和压缩阶段是非对称的，提出了考虑两阶段流动性差异的拉压表观黏度的概念来评价土体的液化流动特性。（）归一化的拉压表观黏度比（为第个振次的值）与超静孔压比的关系基本不受相对密实度、加载频率、固结围压和循环应力比的影响，且首次发现了归一化的黏度比和双幅剪应变的唯一性发展模式不受砂土种类、土体初始状态及加载条件的影响。（）流动性差异参数、拉压表观黏度梯度Δ均随着的增加先增大后减小，两者峰值点对应的孔压基本是一致的，可以视作土体的初始液化点，提出了将砂土的液化过程划分为固体、固液和流体的物态判别方法。

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