A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
An Experimental on Filtration and Clogging of Geotextile Filters around Drain Pipes in Fine Tailings
https://orcid.org/https://orcid.org/0000-0003-4516-6015
https://orcid.org/https://orcid.org/0009-0003-0450-9576
https://orcid.org/https://orcid.org/0000-0001-8547-929X
https://orcid.org/https://orcid.org/0009-0003-8301-1476
Needle-punched nonwoven geotextiles have been used as filters for decades in mine drainage systems. But the physical clogging of geotextiles by fine particles has continued to receive increasing attention. In this study, the permeation characteristics of a drain pipe wrapped with geotextiles were investigated based on a new radial flow experiment apparatus, and particle size distribution (PSD), pore water pressure (PWP), and scanning electron microscopy (SEM) analyses were employed to identify the geotextile clogging mechanism. The geotextile cleaning methods after clogging were also discussed. The results showed that an exponential decay of hydraulic conductivity (K) with time under different flow conditions. Particles less than 30 μm migrated to the drainage pipe under the action of seepage forces, and a dense and thick cake layer was formed upstream of the geotextile filter. According to microscopic analysis, the clogging process of geotextiles was divided into three stages: pore blockage and cake formation, filter cake dynamic growth and cake layer filtration. Backwash cleaning is a good way to remove a filter cake layer on the surface of geotextiles, which can recover 60% of the hydraulic conductivity (K0).
An Experimental on Filtration and Clogging of Geotextile Filters around Drain Pipes in Fine Tailings
https://orcid.org/https://orcid.org/0000-0003-4516-6015
https://orcid.org/https://orcid.org/0009-0003-0450-9576
https://orcid.org/https://orcid.org/0000-0001-8547-929X
https://orcid.org/https://orcid.org/0009-0003-8301-1476
Needle-punched nonwoven geotextiles have been used as filters for decades in mine drainage systems. But the physical clogging of geotextiles by fine particles has continued to receive increasing attention. In this study, the permeation characteristics of a drain pipe wrapped with geotextiles were investigated based on a new radial flow experiment apparatus, and particle size distribution (PSD), pore water pressure (PWP), and scanning electron microscopy (SEM) analyses were employed to identify the geotextile clogging mechanism. The geotextile cleaning methods after clogging were also discussed. The results showed that an exponential decay of hydraulic conductivity (K) with time under different flow conditions. Particles less than 30 μm migrated to the drainage pipe under the action of seepage forces, and a dense and thick cake layer was formed upstream of the geotextile filter. According to microscopic analysis, the clogging process of geotextiles was divided into three stages: pore blockage and cake formation, filter cake dynamic growth and cake layer filtration. Backwash cleaning is a good way to remove a filter cake layer on the surface of geotextiles, which can recover 60% of the hydraulic conductivity (K0).
An Experimental on Filtration and Clogging of Geotextile Filters around Drain Pipes in Fine Tailings
https://orcid.org/https://orcid.org/0000-0003-4516-6015
https://orcid.org/https://orcid.org/0009-0003-0450-9576
https://orcid.org/https://orcid.org/0000-0001-8547-929X
https://orcid.org/https://orcid.org/0009-0003-8301-1476
Needle-punched nonwoven geotextiles have been used as filters for decades in mine drainage systems. But the physical clogging of geotextiles by fine particles has continued to receive increasing attention. In this study, the permeation characteristics of a drain pipe wrapped with geotextiles were investigated based on a new radial flow experiment apparatus, and particle size distribution (PSD), pore water pressure (PWP), and scanning electron microscopy (SEM) analyses were employed to identify the geotextile clogging mechanism. The geotextile cleaning methods after clogging were also discussed. The results showed that an exponential decay of hydraulic conductivity (K) with time under different flow conditions. Particles less than 30 μm migrated to the drainage pipe under the action of seepage forces, and a dense and thick cake layer was formed upstream of the geotextile filter. According to microscopic analysis, the clogging process of geotextiles was divided into three stages: pore blockage and cake formation, filter cake dynamic growth and cake layer filtration. Backwash cleaning is a good way to remove a filter cake layer on the surface of geotextiles, which can recover 60% of the hydraulic conductivity (K0).
An Experimental on Filtration and Clogging of Geotextile Filters around Drain Pipes in Fine Tailings
KSCE J Civ Eng
Li, Dong-dong (author) / Cui, Xuan (author) / Huang, Jing-qi (author) / Han, Ya-bing (author)
KSCE Journal of Civil Engineering ; 28 ; 1767-1776
2024-05-01
10 pages
Article (Journal)
Electronic Resource
English
An Experimental on Filtration and Clogging of Geotextile Filters around Drain Pipes in Fine Tailings
| Springer Verlag | 2024
Comparison of Fine Particle Clogging in Soil and Geotextile Filters
| British Library Conference Proceedings | 2000
Evaluation of Geotextile Performance for the Filtration of Fine-Grained Tailings
| British Library Conference Proceedings | 2017