Saturated anisotropic hydraulic conductivity of a compacted lateritic soil
| Autor: | Edmundo Rogério Esquivel, Roberto Aguiar dos Santos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
0211 other engineering and technologies Compaction 02 engineering and technology Molding (process) 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Stress (mechanics) GEOTECNIA Hydraulic conductivity lcsh:Engineering geology. Rock mechanics. Soil mechanics. Underground construction lcsh:TA703-712 Geotechnical engineering Anisotropy Water content 021101 geological & geomatics engineering 0105 earth and related environmental sciences Permeameter |
| Zdroj: | Journal of Rock Mechanics and Geotechnical Engineering, Vol 10, Iss 5, Pp 986-991 (2018) Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1674-7755 |
| Popis: | This study focuses on the saturated anisotropic hydraulic conductivity of a compacted lateritic clayey sandy soil. The effects of the molding water content and the confining stress on the anisotropic hydraulic conductivity are investigated. The hydraulic conductivity is measured with a flexible-wall permeameter. Samples are dynamically compacted into the three compaction states of a standard Proctor compaction curve: the dry branch, optimum water content and wet branch. Depending on the molding water content and confining stress, the hydraulic conductivity may increase or decrease. In addition, the results indicate that, when the samples are compacted to the optimum water content, lower hydraulic conductivity is obtained, except at a confining stress equal to 50 kPa. The increase of the confining stress decreases the hydraulic conductivity for each of the evaluated compaction states. In the wet branch, horizontal hydraulic conductivity is about 8 times higher than the vertical value. The anisotropic hydraulic conductivities of the dry and wet branches decrease when the confining stress increases, and the opposite is observed in the optimum water content state. Keywords: Hydraulic conductivity, Anisotropic behavior, Lateritic soil, Tropical soil, Compacted soil |
| Databáze: | OpenAIRE |
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