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<p>To investigate more thoroughly the frost heave effects on mudstone layers during the construction of near-shore frozen walls and to analyze the degradation mechanisms of mudstone blocks caused by the precipitation of ions from seawater at low temperatures, the stress–strain behavior of test specimens was examined. This analysis explored the degradation mechanisms of mudstone under varying low-temperature conditions. Research findings indicate that in coastal frozen ground regions, synergistic salt precipitation significantly exacerbates degradation within the frozen layer. The formation of microfractures due to salt precipitation at low temperatures further deteriorates the mudstone, leading to a reduction in its elastic modulus. Higher water content exacerbates damage to salt-laden mudstone blocks, thereby causing greater impairment to the bearing capacity of surrounding rock and soil around the frozen wall. Uniaxial compressive strength tests were conducted on rock blocks subjected to varying degrees of seawater permeation during freezing. Findings revealed that greater seawater content markedly weakened the mechanical properties of rock blocks. Consequently, construction within coastal mudstone strata must account for the degradation effects of seawater exposure. Mitigating risks requires preventing the reduction in mudstone mechanical performance caused by salt precipitation at low temperatures and the frost heave effects of seawater. Investigating the effects of salt precipitation on frozen ground holds significant importance for construction practices involving frozen soil.</p>

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Analysis of Uniaxial Compressive Strength of Mudstone under Synergistic Effects of Different Moisture Content and Salting-Out at Low Temperatures in Coastal Construction Conditions

  • 期刊论文

  • 发表日期：

    2026年6月18日

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  • Bowen Liu,
  • Wei Chen,
  • Jiayu Bao,
  • Jie Liu,
  • Junjie Huang,
  • Mengyin Shi,
  • Xiaomei Liu

摘要

To investigate more thoroughly the frost heave effects on mudstone layers during the construction of near-shore frozen walls and to analyze the degradation mechanisms of mudstone blocks caused by the precipitation of ions from seawater at low temperatures, the stress–strain behavior of test specimens was examined. This analysis explored the degradation mechanisms of mudstone under varying low-temperature conditions. Research findings indicate that in coastal frozen ground regions, synergistic salt precipitation significantly exacerbates degradation within the frozen layer. The formation of microfractures due to salt precipitation at low temperatures further deteriorates the mudstone, leading to a reduction in its elastic modulus. Higher water content exacerbates damage to salt-laden mudstone blocks, thereby causing greater impairment to the bearing capacity of surrounding rock and soil around the frozen wall. Uniaxial compressive strength tests were conducted on rock blocks subjected to varying degrees of seawater permeation during freezing. Findings revealed that greater seawater content markedly weakened the mechanical properties of rock blocks. Consequently, construction within coastal mudstone strata must account for the degradation effects of seawater exposure. Mitigating risks requires preventing the reduction in mudstone mechanical performance caused by salt precipitation at low temperatures and the frost heave effects of seawater. Investigating the effects of salt precipitation on frozen ground holds significant importance for construction practices involving frozen soil.