Vacuum Filtration Theory for Slurry Considering Bidirectional Deformation Based on Elliptical Cylinder Model
Jiahao Wang
College of Civil Engineering and Architecture, Quzhou University, Quzhou, Zhejiang, China
Search for more papers by this authorCorresponding Author
Li Shi
College of Civil Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China
Search for more papers by this authorHongxu Jin
College of Civil Engineering and Architecture, Quzhou University, Quzhou, Zhejiang, China
Search for more papers by this authorBo Chen
College of Civil Engineering and Architecture, Quzhou University, Quzhou, Zhejiang, China
Search for more papers by this authorZhen Huang
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang, China
Search for more papers by this authorJiahao Wang
College of Civil Engineering and Architecture, Quzhou University, Quzhou, Zhejiang, China
Search for more papers by this authorCorresponding Author
Li Shi
College of Civil Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang, China
Search for more papers by this authorHongxu Jin
College of Civil Engineering and Architecture, Quzhou University, Quzhou, Zhejiang, China
Search for more papers by this authorBo Chen
College of Civil Engineering and Architecture, Quzhou University, Quzhou, Zhejiang, China
Search for more papers by this authorZhen Huang
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang, China
Search for more papers by this authorFunding: This work was financially supported by National Natural Science Foundation of China (Grant Number: 52278377) and Natural Science Foundation of Zhejiang Province (Grant Number: LZ22E080009).
ABSTRACT
Vacuum preloading combined with prefabricated vertical drains is commonly used for enhancing the high water content slurry. However, the process of slurry dewatering, which is inherently a filtration problem, is difficult to describe using consolidation theories. This study presents a new vacuum filtration theory for slurry based on the elliptical cylinder model, where the radial and vertical deformations are governed by the equal settlement assumption. To describe the permeability and compressibility of slurry, the extended power function equations are adopted. The governing equations associated with the influenced zone and the moving boundary are essential components of the vacuum filtration theory, which are solved by the finite difference method. The applicability of the theory is confirmed by comparing the results of it with the laboratory tests and the radial filtration theory. Depending on the properties of the slurry used in the laboratory tests, the filtration behaviour are analysed. Finally, parametric analysis is carried out to investigate the effect of vacuum pressure on the filtration behaviour of the slurry.
Open Research
Data Availability Statement
Some or all data, models or code that support the findings of this study are available from the corresponding author upon reasonable request.
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