Differential analysis and unified predictive modeling of capillary rise in sodium chloride and sodium sulfate saline soils

IF 1.827 Q2 Earth and Planetary Sciences
Yupeng Shen, Lin Wang, Quan Cao, Jamlick Kariuki, Chengcheng Luo
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引用次数: 0

Abstract

Capillary rise in saline soils is a key indirect factor leading to the degradation of structural performance in subgrade and similar structures. The type and salt content (SC) of the saline soil further complicate capillary rise, posing significant challenges for preventing and controlling capillary rise in subgrade and other structures. This study used sodium chloride saline soil (NCS) and sodium sulfate saline soil (NSS) as the research objects, investigating the capillary rise characteristics of saline soils and the influence of salt type and content on capillary variations. The soil suction was measured using the filter paper to aid the analysis. The results showed that adding sodium chloride (NaCl) and sodium sulfate (Na2SO4) affected all three stages of capillary rise in soil. These effects included promoting elevation, gradual wane, and reverse inhibition. During the promotion stage, capillary rises rapidly, leading to significant changes in the moisture field of the subgrade and accelerating the destruction of its strength and stability. The effect of salt type on the maximum capillary height was closely related to changes in SC. Compared to NCS, NSS exhibited a more substantial capillary rise at low SC. However, as the SC increased, the inhibitory effect on capillary rise gradually intensified. According to Chinese standards, weak saline soils, traditionally considered more suitable for subgrade construction, exhibited more significant capillary rise, which requires attention in future subgrade construction. A significant correlation was observed between capillary rise and suction for both types of saline soils at different SCs. The maximum capillary height prediction model for saline soils, adjusted by soil suction, demonstrated applicability and accuracy, providing valuable insights for capillary rise prevention in subgrade construction.

氯化钠和硫酸钠盐渍土毛细上升的差异分析与统一预测模型
盐渍土毛细上升是导致路基及类似结构结构性能退化的关键间接因素。盐渍土的类型和含盐量使毛管隆起进一步复杂化,为防治路基及其他构筑物毛管隆起提出了重大挑战。本研究以氯化钠盐渍土(NCS)和硫酸钠盐渍土(NSS)为研究对象,研究了盐渍土的毛细上升特征以及盐的种类和含量对毛细变化的影响。用滤纸测量土壤吸力以辅助分析。结果表明:NaCl和Na2SO4的添加对土壤毛管上升的三个阶段均有影响。这些作用包括促进升高、逐渐减弱和反向抑制。在促进阶段,毛细迅速上升,导致路基水分场发生显著变化,加速了路基强度和稳定性的破坏。盐型对最大毛细高度的影响与SC的变化密切相关,与NCS相比,NSS在低SC时毛细上升更为明显,但随着SC的增加,对毛细上升的抑制作用逐渐增强。根据中国标准,传统上认为更适合路基施工的弱盐渍土,毛细上升更为明显,这在今后的路基施工中值得注意。在不同的SCs条件下,两种盐渍土的毛细上升与吸力之间存在显著的相关关系。盐碱土在吸力作用下的最大毛管高度预测模型具有较好的适用性和准确性,为地基施工中毛管上升的防治提供了有价值的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Arabian Journal of Geosciences
Arabian Journal of Geosciences GEOSCIENCES, MULTIDISCIPLINARY-
自引率
0.00%
发文量
1587
审稿时长
6.7 months
期刊介绍: The Arabian Journal of Geosciences is the official journal of the Saudi Society for Geosciences and publishes peer-reviewed original and review articles on the entire range of Earth Science themes, focused on, but not limited to, those that have regional significance to the Middle East and the Euro-Mediterranean Zone. Key topics therefore include; geology, hydrogeology, earth system science, petroleum sciences, geophysics, seismology and crustal structures, tectonics, sedimentology, palaeontology, metamorphic and igneous petrology, natural hazards, environmental sciences and sustainable development, geoarchaeology, geomorphology, paleo-environment studies, oceanography, atmospheric sciences, GIS and remote sensing, geodesy, mineralogy, volcanology, geochemistry and metallogenesis.
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