Shear strength of compacted soil under infiltration condition

Landslides in residual soil slopes are commonly induced by rainfall infiltration. These residual soils are typically in an unsaturated state with negative pore-water pressures or matric suctions since the groundwater tables in steep slopes are often deep. The net normal and shear stresses of the soi...

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Main Authors: Rahardjo, Harianto, Leong, Eng Choon, Melinda, F., Han, K. K.
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2011
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Online Access:https://hdl.handle.net/10356/94505
http://hdl.handle.net/10220/7345
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-945052020-03-07T11:43:42Z Shear strength of compacted soil under infiltration condition Rahardjo, Harianto Leong, Eng Choon Melinda, F. Han, K. K. School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Geotechnical Landslides in residual soil slopes are commonly induced by rainfall infiltration. These residual soils are typically in an unsaturated state with negative pore-water pressures or matric suctions since the groundwater tables in steep slopes are often deep. The net normal and shear stresses of the soil remain essentially constant during rainwater infiltration into the slope. Failure of the slope during rainfall can be primarily associated with the decrease in the matric suction of the soil. The objective of the study was to investigate the strength and deformation characteristics of a residual soil of the Bukit Timah Granitic Formation during infiltration that leads to slope failure. There were two modified direct shear apparatuses used. One apparatus was used for the determination of shear strength under controlled suction conditions while the other apparatus was used for shearing-infiltration tests. The shearing-infiltration test results were compared with the shear strength values obtained from the shearing tests under constant suction. The shearing-infiltration test results indicate a close relationship between the decreasing matric suction and the increasing displacement rate of the soil specimen. At the initial part of the infiltration process, there is a rapid reduction in matric suction that is accompanied by little movement in the soil. When failure of the soil is imminent, the soil movement will accelerate. Accepted version 2011-12-07T05:55:49Z 2019-12-06T18:57:12Z 2011-12-07T05:55:49Z 2019-12-06T18:57:12Z 2004 2004 Journal Article Melinda, F., Rahardjo, H., Han, K. K., & Leong, E. C. (2004). Shear Strength of Compacted Soil under Infiltration Condition. Journal of Geotechnical and Geoenvironmental Engineering, 130(8), 807–817. https://hdl.handle.net/10356/94505 http://hdl.handle.net/10220/7345 10.1061/(ASCE)1090-0241(2004)130:8(807) en Journal of geotechnical and geoenvironmental engineering © 2004 ASCE
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
Rahardjo, Harianto
Leong, Eng Choon
Melinda, F.
Han, K. K.
Shear strength of compacted soil under infiltration condition
description Landslides in residual soil slopes are commonly induced by rainfall infiltration. These residual soils are typically in an unsaturated state with negative pore-water pressures or matric suctions since the groundwater tables in steep slopes are often deep. The net normal and shear stresses of the soil remain essentially constant during rainwater infiltration into the slope. Failure of the slope during rainfall can be primarily associated with the decrease in the matric suction of the soil. The objective of the study was to investigate the strength and deformation characteristics of a residual soil of the Bukit Timah Granitic Formation during infiltration that leads to slope failure. There were two modified direct shear apparatuses used. One apparatus was used for the determination of shear strength under controlled suction conditions while the other apparatus was used for shearing-infiltration tests. The shearing-infiltration test results were compared with the shear strength values obtained from the shearing tests under constant suction. The shearing-infiltration test results indicate a close relationship between the decreasing matric suction and the increasing displacement rate of the soil specimen. At the initial part of the infiltration process, there is a rapid reduction in matric suction that is accompanied by little movement in the soil. When failure of the soil is imminent, the soil movement will accelerate.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Rahardjo, Harianto
Leong, Eng Choon
Melinda, F.
Han, K. K.
format Article
author Rahardjo, Harianto
Leong, Eng Choon
Melinda, F.
Han, K. K.
author_sort Rahardjo, Harianto
title Shear strength of compacted soil under infiltration condition
title_short Shear strength of compacted soil under infiltration condition
title_full Shear strength of compacted soil under infiltration condition
title_fullStr Shear strength of compacted soil under infiltration condition
title_full_unstemmed Shear strength of compacted soil under infiltration condition
title_sort shear strength of compacted soil under infiltration condition
publishDate 2011
url https://hdl.handle.net/10356/94505
http://hdl.handle.net/10220/7345
_version_ 1681043832941051904