Consolidation of slurry treated by PHDs-VP incorporating development process of clogged zone

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes Pub Date : 2025-03-22 DOI:10.1016/j.geotexmem.2025.03.003

Kang Yang , Mengmeng Lu , Kuo Li , Xiusong Shi

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Abstract

The prefabricated horizontal drains combined with vacuum preloading (PHDs-VP) method exhibits significant benefits in dredged slurry treatment. This study introduces an analytical model of slurry consolidation treated by PHDs-VP. In this model, the PHD is treated as a permeable boundary with a vacuum pressure. The governing equations are established by dividing the analytical unit into normal zone and clogged zone, and by incorporating the development process of the clogged zone. Numerical solutions are obtained utilizing the finite difference method. The accuracy and reliability of the solutions are validated through both degradation analysis and experimental verification. Furthermore, a parametrical analysis is conducted to investigate the influence of several key parameters on consolidation behavior. The results indicate that the clogging effect significantly retards the consolidation process, with a lower permeability coefficient or a greater thickness of the clogged zone resulting in a more pronounced reduction in the consolidation rate. Additionally, the consolidation rate decreases with the accelerated development of the clogged zone, and this effect becomes more pronounced with denser PHDs layout.

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含堵塞区发展过程的ph - vp处理浆体固结

预制水平排水管结合真空预压（ph - vp）方法在疏浚泥浆处理中具有显著的效果。介绍了ph - vp处理浆体固结的分析模型。在该模型中，将PHD视为具有真空压力的可渗透边界。将分析单元划分为正常区和堵塞区，结合堵塞区的发展过程，建立了控制方程。利用有限差分法得到了数值解。通过退化分析和实验验证，验证了解的准确性和可靠性。此外，还进行了参数分析，探讨了几个关键参数对固结行为的影响。结果表明：堵塞效应显著延缓了固结过程，渗透系数越低或堵塞区厚度越大，固结速率降低越明显；此外，固结速率随着堵塞区发育的加快而降低，并且随着博士层的密集，这种影响更加明显。

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来源期刊

Geotextiles and Geomembranes 地学-地球科学综合

CiteScore

9.50

自引率

21.20%

发文量

111

审稿时长

59 days

期刊介绍： The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.