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Permeability property variation in sandy soil induced by suffusion via a horizontal seepage laboratory test
https://orcid.org/http://orcid.org/0000-0003-1624-3659
Suffusion is a typical kind of internal erosion that changes the permeability property of soil without destroying its structure. A horizontal laboratory test was conducted to analyze the permeability property variation in sandy soil caused by suffusion, and the content of fine sand (Rf) varied from 5 to 25%. Water-level along the seepage path is monitored, and the average hydraulic conductivity of the whole experimental soil (kav) and hydraulic conductivity between two adjacent monitoring tubes (kij) were obtained. The suffusion process experienced diffuse, strong and gentle-migration phases temporally according the variation tendency in kav. The rate of change in kav (Rav) enhanced after suffusion, and the critical value of Rf resulted in the largest variation in Rav was 11.8%, and this conclusion was verified by a discrete element method, in which the corresponding value was 12.2%. According to the variation in Rf along the seepage path, three areas were divided as the runoff, transited and accumulated areas spatially. Moreover, values of the rate of change in kij (Rij) in the runoff and the accumulated areas were much larger than that in the transited area, which were resulted from loss of fine sand, rebound of water-level and comprehensive effect of migrated and accumulated fine sand.
Permeability property variation in sandy soil induced by suffusion via a horizontal seepage laboratory test
https://orcid.org/http://orcid.org/0000-0003-1624-3659
Suffusion is a typical kind of internal erosion that changes the permeability property of soil without destroying its structure. A horizontal laboratory test was conducted to analyze the permeability property variation in sandy soil caused by suffusion, and the content of fine sand (Rf) varied from 5 to 25%. Water-level along the seepage path is monitored, and the average hydraulic conductivity of the whole experimental soil (kav) and hydraulic conductivity between two adjacent monitoring tubes (kij) were obtained. The suffusion process experienced diffuse, strong and gentle-migration phases temporally according the variation tendency in kav. The rate of change in kav (Rav) enhanced after suffusion, and the critical value of Rf resulted in the largest variation in Rav was 11.8%, and this conclusion was verified by a discrete element method, in which the corresponding value was 12.2%. According to the variation in Rf along the seepage path, three areas were divided as the runoff, transited and accumulated areas spatially. Moreover, values of the rate of change in kij (Rij) in the runoff and the accumulated areas were much larger than that in the transited area, which were resulted from loss of fine sand, rebound of water-level and comprehensive effect of migrated and accumulated fine sand.
Permeability property variation in sandy soil induced by suffusion via a horizontal seepage laboratory test
https://orcid.org/http://orcid.org/0000-0003-1624-3659
Suffusion is a typical kind of internal erosion that changes the permeability property of soil without destroying its structure. A horizontal laboratory test was conducted to analyze the permeability property variation in sandy soil caused by suffusion, and the content of fine sand (Rf) varied from 5 to 25%. Water-level along the seepage path is monitored, and the average hydraulic conductivity of the whole experimental soil (kav) and hydraulic conductivity between two adjacent monitoring tubes (kij) were obtained. The suffusion process experienced diffuse, strong and gentle-migration phases temporally according the variation tendency in kav. The rate of change in kav (Rav) enhanced after suffusion, and the critical value of Rf resulted in the largest variation in Rav was 11.8%, and this conclusion was verified by a discrete element method, in which the corresponding value was 12.2%. According to the variation in Rf along the seepage path, three areas were divided as the runoff, transited and accumulated areas spatially. Moreover, values of the rate of change in kij (Rij) in the runoff and the accumulated areas were much larger than that in the transited area, which were resulted from loss of fine sand, rebound of water-level and comprehensive effect of migrated and accumulated fine sand.
Permeability property variation in sandy soil induced by suffusion via a horizontal seepage laboratory test
Acta Geotech.
Wang, Xu-Wei (author) / Xu, Ye-Shuang (author)
Acta Geotechnica ; 18 ; 5285-5298
2023-10-01
14 pages
Article (Journal)
Electronic Resource
English
DEM simulation , Internal erosion , Laboratory test , Particle migration , Permeability property , Suffusion Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
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