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http://dx.doi.org/10.5389/KSAE.2005.47.4.053

Seepage Characteristics of Embankment as with/without Gravel Layer under the Earth Fill  

Lee Haeng Woo (농업기반공사)
Chang Pyoung Wuck (서울대학교 농업생명과학대학 조경 지역시스템공학부)
Chang Woong Hee (농업기반공사 농어촌연구원)
Kim See-Woon (농업기반공사)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.47, no.4, 2005 , pp. 53-61 More about this Journal
Abstract
A series of laboratory tests was carried out fur analyzing of seepage characteristics of two-layers embankment model which consists of gravel and earth fill layers. Gravel layers were built under the earth fill for a half and one-third width of earth fill of the model. Permeability of earth fill was ranged between $5.00\times10^{-5}\~3.00\times10^{-4}\;m/s$.. The tests were performed with hydraulic gradients(i), $0.10\~0.55$. From the test results, hydraulic head of earth fill with gravel layer was 1.6 times higher than that of earth fill without gravel layer. Seepage rate was increased up to $4\~22$ times and safety factor for piping was decreased to $13\~43\;\%$ comparing the earth fill with gravel layer to that without gravel layer. The gravel layer under the earth fill could, in general, give some serious seepage problems to seadike embankment.
Keywords
Two-layer earth fill; Gravel layer; Water head Seepage rate; Piping;
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  • Reference
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