Hydraulic anisotropy of unsaturated soils with unimodal and bimodal characteristics

Hydraulic anisotropy of a soil represents a directional dependence of its permeability. Past research on hydraulic anisotropy under unsaturated condition were mainly limited to the extent of theoretical concept. The available experimental results in literature focused only on one particular soil mix...

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Main Author: Janiardy, Kevin
Other Authors: Harianto Rahardjo
Format: Final Year Project
Language:English
Published: 2017
Subjects:
Online Access:http://hdl.handle.net/10356/71838
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-718382023-03-03T16:53:14Z Hydraulic anisotropy of unsaturated soils with unimodal and bimodal characteristics Janiardy, Kevin Harianto Rahardjo School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Geotechnical Hydraulic anisotropy of a soil represents a directional dependence of its permeability. Past research on hydraulic anisotropy under unsaturated condition were mainly limited to the extent of theoretical concept. The available experimental results in literature focused only on one particular soil mixture, i.e. 50% sand and 50% kaolin. This project advanced the experimental study of those literatures. It aimed to understand the hydraulic anisotropy characteristics of unsaturated soils with unimodal and bimodal characteristics and to examine its relationship with fines content. Laboratory experiments comprising index soil properties, soil-water characteristic curve (SWCC), and saturated and unsaturated permeability tests of compacted soil made of 30% sand and 70% kaolin were carried out. Experimental results indicated that at a given composition, soil with unimodal SWCC (compacted at wet of optimum) has a higher hydraulic anisotropy as compared to soil with bimodal SWCC (compacted at dry of optimum). Hydraulic anisotropy of soil became less prominent with the increase in fines content and the decrease in dry density. Furthermore, hydraulic anisotropy in the unsaturated condition exhibited similar values to that in the saturated condition, regardless of its initial compaction conditions. In addition, evaluation towards statistical model to estimate unsaturated permeability substantiated the applicability of the estimation to indirectly determine hydraulic anisotropy of soil with unimodal and bimodal SWCCs. Bachelor of Engineering (Civil) 2017-05-19T05:53:54Z 2017-05-19T05:53:54Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/71838 en Nanyang Technological University 62 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering::Geotechnical
spellingShingle DRNTU::Engineering::Civil engineering::Geotechnical
Janiardy, Kevin
Hydraulic anisotropy of unsaturated soils with unimodal and bimodal characteristics
description Hydraulic anisotropy of a soil represents a directional dependence of its permeability. Past research on hydraulic anisotropy under unsaturated condition were mainly limited to the extent of theoretical concept. The available experimental results in literature focused only on one particular soil mixture, i.e. 50% sand and 50% kaolin. This project advanced the experimental study of those literatures. It aimed to understand the hydraulic anisotropy characteristics of unsaturated soils with unimodal and bimodal characteristics and to examine its relationship with fines content. Laboratory experiments comprising index soil properties, soil-water characteristic curve (SWCC), and saturated and unsaturated permeability tests of compacted soil made of 30% sand and 70% kaolin were carried out. Experimental results indicated that at a given composition, soil with unimodal SWCC (compacted at wet of optimum) has a higher hydraulic anisotropy as compared to soil with bimodal SWCC (compacted at dry of optimum). Hydraulic anisotropy of soil became less prominent with the increase in fines content and the decrease in dry density. Furthermore, hydraulic anisotropy in the unsaturated condition exhibited similar values to that in the saturated condition, regardless of its initial compaction conditions. In addition, evaluation towards statistical model to estimate unsaturated permeability substantiated the applicability of the estimation to indirectly determine hydraulic anisotropy of soil with unimodal and bimodal SWCCs.
author2 Harianto Rahardjo
author_facet Harianto Rahardjo
Janiardy, Kevin
format Final Year Project
author Janiardy, Kevin
author_sort Janiardy, Kevin
title Hydraulic anisotropy of unsaturated soils with unimodal and bimodal characteristics
title_short Hydraulic anisotropy of unsaturated soils with unimodal and bimodal characteristics
title_full Hydraulic anisotropy of unsaturated soils with unimodal and bimodal characteristics
title_fullStr Hydraulic anisotropy of unsaturated soils with unimodal and bimodal characteristics
title_full_unstemmed Hydraulic anisotropy of unsaturated soils with unimodal and bimodal characteristics
title_sort hydraulic anisotropy of unsaturated soils with unimodal and bimodal characteristics
publishDate 2017
url http://hdl.handle.net/10356/71838
_version_ 1759853963789729792