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《Chinese Jounal of Geotechnical Engineering》 1993-06
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Permeability, Erosion Resistance and Filters of Broadly Graded Gravelly Soil for Embankment Dam Construction

Zhu Jian-hua You Fan Yang Kai-hong (Institute of Water Conservancy and Hydroelictric Power Research)  
In connection with the construction of Pubugou Project, anti-seepage behavior and piping resistance of gravelly soil with broad gradation were studied systematically and the criteria of critical filter for resisting erosion failure of gravelly soil were proposed. Results showed that gravelly soil will fulfill impermeability requirement when P_0.1 of fine particle content 25% and the effect of impermeability will be more remarkable when filled with 2%~3% on the wet side of optimum water content; the criteria of critical filter for preventing core material from erosion failure are D15≤1.1mm, D_15/d_85~4≤15~17 when P_0.130%,andD_15≤1.1mm, D_15/d_85~4≤20 when P_0.130%.
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