Characteristics of scanning curves of two soils

Scanning curves of two different soils were obtained from three series of infiltration and drainage experiments on two physical models of soil slopes in the laboratory. The first slope model consisted of a fine sand layer overlying a gravelly sand layer, while the second slope model involved a silty...

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Main Authors: Tami, Denny, Rahardjo, Harianto, Leong, Eng Choon
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2011
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Online Access:https://hdl.handle.net/10356/101349
http://hdl.handle.net/10220/7322
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1013492020-03-07T11:43:43Z Characteristics of scanning curves of two soils Tami, Denny Rahardjo, Harianto Leong, Eng Choon School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Geotechnical Scanning curves of two different soils were obtained from three series of infiltration and drainage experiments on two physical models of soil slopes in the laboratory. The first slope model consisted of a fine sand layer overlying a gravelly sand layer, while the second slope model involved a silty sand layer overlying a gravelly sand layer. Each soil layer had a thickness of 200 mm and both slope models had an inclination angle of 30°. The slope models were subjected to artificial rainfalls of different intensities, followed by draining where no rainfall was applied. Various instruments were installed to continuously measure the changes in matric suction, volumetric water content and the water balance of the slope models during the experiment. Scanning curves were then constructed using the matric suction and water content data measured at the bottom, middle and top parts of the slope models and were compared with the primary drying and primary wetting soil-water characteristic curves that were measured separately. It was found that the scanning curves followed the primary wetting curve during the adsorption process and then followed the primary drying curve during the desorption process. During the transition period, over which the scanning curve moved from the primary drying curve to the primary wetting curve (or vice versa), the path of the scanning curve had a relatively flat slope as compared to the slope of the primary curves, and sometimes it was almost horizontal. However, the slope and the path of the scanning curves were found to be similar for the cases with similar initial conditions. Accepted version 2011-12-05T03:30:10Z 2019-12-06T20:37:01Z 2011-12-05T03:30:10Z 2019-12-06T20:37:01Z 2007 2007 Journal Article Tami, D., Rahardjo, H., & Leong, E. C. (2007). Characteristics of Scanning Curves of Two Soils. Soils and Foundations, 47(1), 97–108. https://hdl.handle.net/10356/101349 http://hdl.handle.net/10220/7322 10.3208/sandf.47.97 en Soils and foundations © 2007 The Japanese Geotechnical Society
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Civil engineering::Geotechnical
spellingShingle DRNTU::Engineering::Civil engineering::Geotechnical
Tami, Denny
Rahardjo, Harianto
Leong, Eng Choon
Characteristics of scanning curves of two soils
description Scanning curves of two different soils were obtained from three series of infiltration and drainage experiments on two physical models of soil slopes in the laboratory. The first slope model consisted of a fine sand layer overlying a gravelly sand layer, while the second slope model involved a silty sand layer overlying a gravelly sand layer. Each soil layer had a thickness of 200 mm and both slope models had an inclination angle of 30°. The slope models were subjected to artificial rainfalls of different intensities, followed by draining where no rainfall was applied. Various instruments were installed to continuously measure the changes in matric suction, volumetric water content and the water balance of the slope models during the experiment. Scanning curves were then constructed using the matric suction and water content data measured at the bottom, middle and top parts of the slope models and were compared with the primary drying and primary wetting soil-water characteristic curves that were measured separately. It was found that the scanning curves followed the primary wetting curve during the adsorption process and then followed the primary drying curve during the desorption process. During the transition period, over which the scanning curve moved from the primary drying curve to the primary wetting curve (or vice versa), the path of the scanning curve had a relatively flat slope as compared to the slope of the primary curves, and sometimes it was almost horizontal. However, the slope and the path of the scanning curves were found to be similar for the cases with similar initial conditions.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Tami, Denny
Rahardjo, Harianto
Leong, Eng Choon
format Article
author Tami, Denny
Rahardjo, Harianto
Leong, Eng Choon
author_sort Tami, Denny
title Characteristics of scanning curves of two soils
title_short Characteristics of scanning curves of two soils
title_full Characteristics of scanning curves of two soils
title_fullStr Characteristics of scanning curves of two soils
title_full_unstemmed Characteristics of scanning curves of two soils
title_sort characteristics of scanning curves of two soils
publishDate 2011
url https://hdl.handle.net/10356/101349
http://hdl.handle.net/10220/7322
_version_ 1681047825280925696