土工基础

土工基础 ›› 2026, Vol. 40 ›› Issue (1): 149-153.

• 测试技术 • 上一篇    下一篇

脱-吸湿路径对粉质黏土电阻率影响试验研究

李科1，2，樊恒辉1，李雪梅3，梁美洁2，周丽娜4   

  1. （1.西北农林科技大学 水利与建筑工程学院，陕西杨凌 712100；2.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；3.浙江省水利河口研究院（浙江省海洋规划设计研究院），杭州 310009；4.中核工程咨询有限公司，北京 100000）
  • 收稿日期:2023-11-16 修回日期:2023-11-29 出版日期:2026-02-28 发布日期:2026-04-22
  • 通讯作者: 樊恒辉（1973-），男，博士，研究员，研究方向为特殊土土力学及其工程性质、土壤固化改良等。
  • 作者简介:李科(1999-)，男，硕士研究生，研究方向为特殊土力学。
  • 基金资助:
    湖北省自然科学基金计划项目资助（2023AFB835）

Experimental Study on the Effect of Desorption-Absorption Moisture Process on the Resistivity of a Silty Clay

LI Ke1,2, FAN Henghui1, LI Xuemei3, LIANG Meijie2， ZHOU Lina4   

  1. (1.College of Water Resources and Architectural Engineering, Northwest Agriculture and Forestry University, Yangling 712100；
    2.State Key Laboratory for Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071；
    3.Zhejiang Institute of Hydraulics & Estuary, Zhejiang Institute of Marine Planning and Design, Hangzhou 310009；
    4.China Nuclear Engineering Consulting Co. Ltd., Beijing 100000)
  • Received:2023-11-16 Revised:2023-11-29 Online:2026-02-28 Published:2026-04-22

摘要： 土体电阻率表征土的电阻特性，是评价土体的基本物理指标之一，与土体结构、矿物成分和含水率等因素有关。通过室内试验对不同压实度及脱-吸湿路径下的粉质黏土进行了电阻率测试，探究了压实度和脱吸-湿路径对粉质黏土电阻率变化的影响及其影响机制，利用Gunzel、Waxman模型对试验结果进行对比分析，找出最适用于该粉质黏土在脱-吸湿路径下的电阻率结构模型。结果表明：在低压实度条件下，随着体积含水率的升高，电阻率的下降速率更大；在相同含水率下，土样在脱湿路径上具有更大的电阻率；拟合结果表明Gunzel、Waxman模型在吸湿路径下拟合精度更高。

关键词: 非饱和土, 电阻率, 压实度, 脱-吸湿路径

Abstract: Soil resistivity is one of the basic physical indices to evaluate soil characteristics, which is related to soil structure, mineral composition, moisture content and other factors. In this paper, the resistivity of silty clay samples under different degrees of compaction and desorption-absorption moisture paths are tested through laboratory tests. The effects of degree of compaction and desorption-absorption moisture paths on the resistivity changes of silty clay samples and their influencing mechanisms are investigated. Finally, Gunzel and Waxman models were used to compare and analyze the test results. The most suitable resistivity structure model for the silty clay in the dehumidification and hygroscopic process is identified. The results show that the decrease rate of resistivity is greater with the increase of volumetric water content under the condition of lower degree of compaction. Under the same moisture content, the resistivity of the soil sample on the desorption-absorption moisture path is greater. The fitting results show that the Gunzel and Waxman models have higher fitting accuracy.

Key words: Unsaturated Soil, Resistivity, Degree of Compaction, Desorption Absorption , Moisture Absorption Moisture Path

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