Consolidation Analysis of Dredged Slurry Treated by Crosswise-Arranged Prefabricated Horizontal Drains: Analytical and Experimental Insights
Publication: International Journal of Geomechanics
Volume 24, Issue 11
Abstract
The use of prefabricated horizontal drains (PHDs) combined with vacuum preloading (VP) has emerged as a popular dredged slurry treatment strategy. However, few theoretical contributions are available to assess its consolidation characteristics in practical engineering design and applications. In this context, an analytical model is proposed to predict the consolidation behavior of the dredged slurry with assistance of PHDs subjected to VP. Initially, an equivalent cylindrical unit cell is established in accordance with the area equivalence principle. Then the governing equation and analytical solution are derived by converting the external loading into the lateral loading acting on the typical unit cell. In the current model, the layered filling process of dredged slurry and the corresponding layered layout patterns of PHDs are comprehensively incorporated. Furthermore, an in-depth assessment is conducted to explore the impacts of several crucial parameters on the consolidation performance. Additionally, a laboratory model experiment is carried out to treat the dredged slurry by a double-layer crosswise layout of PHDs in combination of VP. Thereafter, the accuracy and reasonability of the obtained solution are validated through degradation analysis and experimental data. Based on the parametric analysis and experimental outcomes, compared with prefabricated vertical drains (PVDs), the use of PHDs is observed to facilitate the transmission of vacuum pressure and ensure a more uniform settlement of dredged slurry, thereby ultimately improving dewatering efficiency.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This study is supported by the National Natural Science Foundation of China (No. 52178373), which is gratefully acknowledged.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 24 • Issue 11 • November 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Jan 14, 2024
Accepted: May 30, 2024
Published online: Sep 5, 2024
Published in print: Nov 1, 2024
Discussion open until: Feb 5, 2025
ASCE Technical Topics:
- Bodies of water (by type)
- Coasts, oceans, ports, and waterways engineering
- Construction engineering
- Construction industry
- Construction management
- Continuum mechanics
- Design (by type)
- Drainage
- Dredged materials
- Dredging
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Hydraulic engineering
- Hydraulic structures
- Irrigation engineering
- Lateral loads
- Load factors
- Offsite construction
- Preloading
- River engineering
- Sediment
- Solid mechanics
- Structural design
- Structural dynamics
- Structural engineering
- Structures (by type)
- Water and water resources
- Water management
- Waterways
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