TITLE:
Mechanism Analysis of Pore Water Pressure Fluctuation During Clay Precompression Consolidation
AUTHORS:
Yueqin Wu, Dengheng Zheng, Chenglong Jiao, Siying Xie, Qiaojing Li, Yingyi Tan, Yuling Tu
KEYWORDS:
Clay Consolidation, Pore Water Pressure, Bound Water
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.12 No.4,
November
12,
2024
ABSTRACT: Pore water pressure fluctuations are an inherent phenomenon during the consolidation process of clayey foundations, and understanding its mechanism is crucial for comprehending the consolidation process and addressing issues such as drainage blockage during consolidation. This study investigates the consolidation behavior of clay, particularly focusing on pore water pressure fluctuations during the consolidation process of dredged marine sedimentary mud from Daya Bay, Guangdong Province. Given the prevalent use of clay in large-scale construction projects in southern China, understanding the factors influencing pore water pressure is crucial for optimizing consolidation times and improving construction efficacy. Using a custom vacuum preloading model, the research explores the impact of sodium hydroxide on the bound water content and its subsequent effects on pore water pressure dynamics. Experimental findings reveal a distinct inflection point in pore water pressure dissipation, suggesting that particle migration and bound water interactions contribute to the observed fluctuations. These results provide valuable insights for enhancing engineering applications in clay consolidation and mitigating drainage issues, ultimately informing construction practices and reducing project timelines.