Scholarlink

<p>This study investigates the migration behavior of enzyme-induced carbonate precipitation (EICP) solutions in saturated marine sands, a topic that remains underexplored. One-dimensional model tests were conducted to examine the effects of initial water content (saturated versus unsaturated), EICP solution concentration, and treatment cycles on engineering properties, including permeability, unconfined compressive strength (UCS), and their spatial uniformity. The results demonstrate a significant influence of the initial water content. At low EICP concentrations, the permeability coefficient of the initially saturated sand was higher than that of the initially unsaturated sand, as the injected solution was diluted by the in situ pore water, resulting in less carbonate precipitation and a greater number of unblocked seepage channels. In contrast, this relationship was reversed at high concentrations due to more effective convective-diffusive transport and a higher utilization of the EICP solution in the initially saturated sand, leading to more thorough pore-filling. The UCS showed a similar relationship to permeability at high concentrations; however, this correspondence was not observed at low concentrations. Regarding uniformity, the spatial variation of the permeability coefficient in initially saturated sand was lower (i.e., more uniform) than in unsaturated sand. A similar trend was observed for UCS uniformity at low concentrations. However, at high concentration, UCS uniformity in the initially saturated sand was lower than that in the initially unsaturated sand. The findings provide theoretical and technical support for the application of EICP in in situ seepage control and foundation reinforcement in marine and coastal engineering.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Spatial evolution of mechanical and hydraulic properties of EICP-treated sand under different initial saturation condition: 1-D model tests

  • 期刊论文

  • 发表日期：

    2026年4月24日

查看全文
  • Chuangzhou Wu,
  • Shixia Zhang,
  • Zhenyuan Liu,
  • Zuoyong Li,
  • Yujing Zhang

摘要

This study investigates the migration behavior of enzyme-induced carbonate precipitation (EICP) solutions in saturated marine sands, a topic that remains underexplored. One-dimensional model tests were conducted to examine the effects of initial water content (saturated versus unsaturated), EICP solution concentration, and treatment cycles on engineering properties, including permeability, unconfined compressive strength (UCS), and their spatial uniformity. The results demonstrate a significant influence of the initial water content. At low EICP concentrations, the permeability coefficient of the initially saturated sand was higher than that of the initially unsaturated sand, as the injected solution was diluted by the in situ pore water, resulting in less carbonate precipitation and a greater number of unblocked seepage channels. In contrast, this relationship was reversed at high concentrations due to more effective convective-diffusive transport and a higher utilization of the EICP solution in the initially saturated sand, leading to more thorough pore-filling. The UCS showed a similar relationship to permeability at high concentrations; however, this correspondence was not observed at low concentrations. Regarding uniformity, the spatial variation of the permeability coefficient in initially saturated sand was lower (i.e., more uniform) than in unsaturated sand. A similar trend was observed for UCS uniformity at low concentrations. However, at high concentration, UCS uniformity in the initially saturated sand was lower than that in the initially unsaturated sand. The findings provide theoretical and technical support for the application of EICP in in situ seepage control and foundation reinforcement in marine and coastal engineering.