Migration patterns and occurrence laws of salinity in earthen sites in the northwest region under alternating precipitation and evaporation conditions

CHEN Wen-wu; WANG Ke-yu; QI Qiang; ZHANG Shao-ran; WANG Li

doi:10.16285/j.rsm.2023.1444

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Migration patterns and occurrence laws of salinity in earthen sites in the northwest region under alternating precipitation and evaporation conditions

更新时间：2026-06-25

- Migration patterns and occurrence laws of salinity in earthen sites in the northwest region under alternating precipitation and evaporation conditions
- Vol. 45, Issue 8, Pages: 2209-2220(2024)
- 作者机构：
  
  1. 兰州大学土木工程与力学学院,甘肃,兰州,730000
  2. 兰州大学西部灾害与环境力学教育部重点实验室,甘肃,兰州,730000
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2023.1444
  CLC： K878;TU41
- Online First：12 August 2024，
  
  Published：2024
- 稿件说明：
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CHEN Wen-wu, WANG Ke-yu, QI Qiang, et al. Migration patterns and occurrence laws of salinity in earthen sites in the northwest region under alternating precipitation and evaporation conditions[J]. 2024, 45(8): 2209-2220.
DOI：

CHEN Wen-wu, WANG Ke-yu, QI Qiang, et al. Migration patterns and occurrence laws of salinity in earthen sites in the northwest region under alternating precipitation and evaporation conditions[J]. 2024, 45(8): 2209-2220. DOI： 10.16285/j.rsm.2023.1444.

摘要

中国西北干旱地区土遗址，广泛受到地基土盐渍作用的影响。针对当前土遗址载体研究不足的现状，基于室内试验，以NaCl为迁移盐分，借助电导率、含水率等参数及表面劣化情况探究了长城遗址体在短时强降雨-自然干燥循环作用下，地基与墙体根部盐分迁移规律。研究发现，随着降雨-干燥循环次数的增加，土遗址立面逐渐出现了底部崩解（掏蚀）、表面析盐、表皮开裂、空鼓等现象，土遗址根部毛细水上升、盐分迁移和表面劣化，3种现象互有关联。在经历数次循环后，地基中盐分供给模式发生了调整，地基-土遗址根部盐分迁移只在有限范围内进行，基于这些研究结果，得出了降雨-蒸发交替作用下地基与土遗址根部盐分迁移机制。所做研究可为土遗址根部酥碱掏蚀的防治提供参考。

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