土工基础

土工基础 ›› 2025, Vol. 39 ›› Issue (2): 321-326.

• 测试技术 • 上一篇    下一篇

基于核磁共振对冻土未冻水含量及分布的研究

葛红孝1，吴佳佳1，李小鹏2，谢浩爵3   

  1. （1.浙江华东工程咨询有限公司，杭州 311122；2.锡林浩特市泰富风力发电有限公司，内蒙古锡林浩特 026000；3.桂林理工大学，广西桂林 541004）
  • 收稿日期:2023-03-31 修回日期:2023-05-25 出版日期:2025-04-30 发布日期:2025-06-03
  • 作者简介:葛红孝（1981-），男，工程师，研究方向为岩土工程。
  • 基金资助:
    广西岩土力学与工程重点实验室研究项目

Study on the Content and Distribution of Unfrozen Water in Frozen Soil Using on Nuclear Magnetic Resonance

GE Hongxiao1, WU Jiajia1, LI Xiaopeng2， XIE Haojue3   

  1. (1.Zhejiang Huadong Engineering Consulting Co. Ltd., Hangzhou 311122；
    2.Xilin Hot Taifu Wind Power Co. Ltd., Xilin Hot 026000；
    3.Guilin University of Technology, Guilin 541004)
  • Received:2023-03-31 Revised:2023-05-25 Online:2025-04-30 Published:2025-06-03

摘要： 冻土是与一般土体有着较大差别的特殊土体。由于实验器材、手段等多方面的限制，当前学者对冻土的研究，多局限于宏观角度，但结合核磁共振技术从微观角度对冻土的未冻水含量及分布进行分析较少。即采用核磁共振技术来测试冻融过程中温度恒定不同初始含水量和初始含水量一样不同温度的土体，并结合T2曲线从微观角度来分析未冻水的孔隙赋存情况。其中，冻结过程包括了三个阶段，分别是过冷度段、快速下降段和稳定段。分析了冻融循环中同一种土质，在同一温度下，初始含水率对未冻水含量的影响，以及初始含水率不变，温度对未冻水含量的影响。再根据未冻水含量的变化来分析未冻水的分布，为后期将核磁共振技术与冻土结合起来的研究提供想法和方式。


关键词: 冻土, 核磁共振, 未冻水含量, 孔隙赋存

Abstract: Frozen soil is a special soil which is different from other general soils. Due to the limitations of the experimental equipment, means and other aspects, current research on the frozen soil is mostly limited to the macro perspective, but the analysis of the content and distribution of the unfrozen water in the frozen soil from the micro perspective is rarely conducted by combining nuclear magnetic resonance technology. In other words, the nuclear magnetic resonance technology is used to test the soil with the constant temperature and the different initial water content as well as the different temperature during freeze-thawing process, and the T2 curve is combined to analyze the occurrence of pores of the unfrozen water from a microscopic perspective. The freezing process includes three stages, namely, the subcooling stage, the rapid decline stage and the stable stage. The influence of the initial water content on the unfrozen water content at the same temperature of the same soil quality in the freeze-thaw cycle is analyzed, and the influence of the initial water content unchanged and the temperature on the unfrozen water content is also analyzed. Then the distribution of the unfrozen water is analyzed according to the change of the content of the unfrozen water, which provides ideas and methods for the later research combining the nuclear magnetic resonance technology with the frozen soils.

Key words: Frozen Soil, Nuclear Magnetic Resonance, Unfrozen Water Content, Pore Occurrence

中图分类号: