Experimental study of water and salt redistributions of saline soil with different freezing modes

BING Hui; HE Ping

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Experimental study of water and salt redistributions of saline soil with different freezing modes

更新时间：2026-06-25

- Experimental study of water and salt redistributions of saline soil with different freezing modes
- Vol. 32, Issue 8, (2011)
- 作者机构：
  
  1. 中国科学院寒区旱区环境与工程研究所冻土工程国家重点试验室,兰州,730000
  2. 北京交通大学隧道及地下工程教育部工程研究中心,北京,100044
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU448
- Online First：16 August 2011，
  
  Published：2011
- 稿件说明：
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BING Hui, HE Ping. Experimental study of water and salt redistributions of saline soil with different freezing modes[J]. 2011, 32(8).
DOI：

BING Hui, HE Ping. Experimental study of water and salt redistributions of saline soil with different freezing modes[J]. 2011, 32(8). DOI：

摘要

土体的冻融历史在土体的冻胀预报和评估的作用不可忽略，不同的冻结方式将影响土体中的水盐重分布及干密度的变化差异。选择土样底端温度相同情况下的单向冻结、正弦波曲线冻融循环和负温循环冻结3种冻结作用模式，对青藏高原铁路沿线红色粉质黏土进行了试验研究，分析了3种冻结模式下土体的冻胀量的变化、水分和盐分的重分布状况以及土体干密度的变化规律，试验结果表明单向冻结过程由于冰的自净作用，阻止了盐分的迁移；土体周期冻融循环后变形具有不可累加性，盐分在随水分发生对流迁移的同时会发生由浓度梯度诱导的扩散迁移；在冻融作用下，土体的压密变形是客观存在的，即体现了冻融对该试验条件下土体结构的强化作用

Abstract

The freeze-thaw history of soil is important to assess and predict frost heave. Different freezing modes will lead to redistributions of water and salt and variety of dry density. Choosing three freezing modes of unidirectional freezing

circular freeze-thaw with sinusoidal wave and circular freezing with negative temperature

experiments of red silty clay along the Qinghai-Tibet Railway are carried out in order to analyze variation of frost heave amount

redistribution condition of water and salt and change law of dry density. The results show that salt transfer is kept out of the freezing soil for ice self-purification during the unidirectional freezing; deformation amount of the soil experienced freezing and thawing is uncumulative. Salt convection with water is accompanied with salt diffusion during freezing and thawing. The existent compression deformation shows the intensified effect of freeze-thaw on soil structure.

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