@Article{sdhm.2020.013001,
AUTHOR = {Xiaolei Man, Ganggang Sha, Shuigen Hu, Hui Bao, Guangying Liu},
TITLE = {Experimental Study on Permeability Characteristics of Geotubes for Seepage Analysis on Safety Assessment of Dams},
JOURNAL = {Structural Durability \& Health Monitoring},
VOLUME = {14},
YEAR = {2020},
NUMBER = {4},
PAGES = {339--353},
URL = {http://www.techscience.com/sdhm/v14n4/40712},
ISSN = {1930-2991},
ABSTRACT = {Geotubes are heterogeneous structures composed of filling sand and
bag material, and its permeability characteristics are different from that of filling
sand. The uncertainty of geotubes permeability characteristics results in the failure
of seepage analysis of geotube dams, which restricts the safety assessment of the
dams. As the basis of the study on the seepage mechanism of the geotubes, the
influence of particle grading on permeability coefficient of filling sand and sand
covered with geotextiles were explored by the permeability tests of filling sand
with different particle grading under the condition of sand covered with or without
geotextiles. And the influence of geotextiles on the permeability coefficient was
analyzed by comparing permeability coefficient of sand covered with and without
geotextiles. The test results show that the influence of single particle size content
on permeability coefficient is consistent under the condition of sand covered with
and without geotextiles. The content of powder, fine, medium and coarse particles
is linearly related to their respective permeability coefficients. And the content of
powder, fine, medium particles is negatively correlated with their permeability
coefficients, while the content of coarse particles is positively correlated with
the permeability coefficient. But the permeability coefficient of sand covered with
geotextiles is smaller than that of filling sand under the same conditions. Finally,
the parameter <img src="http://www.techscience.com/ueditor/files/sdhm-tu.png" width="50px">was selected as a variable representing the particle grading
to fit the empirical formula of permeability coefficient of filling sand and sand
covered with geotextiles.},
DOI = {10.32604/sdhm.2020.013001}
}