Effect of rainfall infiltration on deformation of Geobarrier Wall

GeoBarrier system (GBS) is a system that combines geobag wall with capillary barrier concept as stabilization method against rainfall-induced failure, and vegetation as green cover. This paper presents deformation behaviour of a GBS wall constructed as pilot study when subjected to rainfall infiltra...

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Main Authors: Rahardjo, Harianto, Gofar, Nurly, Satyanaga, Alfrendo, Leong, Eng Choon, Wang, Chien Looi, Wong, Johnny Liang Heng
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/151491
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1514912021-06-22T12:00:09Z Effect of rainfall infiltration on deformation of Geobarrier Wall Rahardjo, Harianto Gofar, Nurly Satyanaga, Alfrendo Leong, Eng Choon Wang, Chien Looi Wong, Johnny Liang Heng School of Civil and Environmental Engineering Building Research Institute, Housing and Development Board Engineering::Civil engineering::Geotechnical GeoBarrier System Rainfall Infiltration GeoBarrier system (GBS) is a system that combines geobag wall with capillary barrier concept as stabilization method against rainfall-induced failure, and vegetation as green cover. This paper presents deformation behaviour of a GBS wall constructed as pilot study when subjected to rainfall infiltration. The GBS wall was 4 m high with 70° slope angle. The wall was subjected to uniform surcharge of 10 kN/m2 and rainfall of 22 mm/h for 8 h. Recycled materials were used as components of the capillary barrier. Coupled deformation-seepage finite element analyses were carried out to evaluate the stress and pore-water pressure variations within and behind the GBS wall during and after rainfall. Limit equilibrium analyses were performed at various stages during and after rainfall to assess the near vertical wall stability. The results of the coupled deformation seepage analysis showed that the reinforced zone in the GBS remained unsaturated during rainfall, indicating that the GBS wall performed well in minimizing the rainwater infiltration. However, the GBS wall face deformation pattern altered during and after rainfall, indicating that the rainfall infiltration increased the lateral stress on the top part of the wall. The variation of lateral stress with depth agrees with field measurements from earth pressure cells. Ministry of National Development (MND) Accepted version The findings published in this paper are based on the project Geobarrier System for Use in Underground Structure (Grant No. SUL2013-3) that is supported by a research grant from the Ministry of National Development Research Fund on Sustainable Urban Living, Singapore. 2021-06-22T08:50:30Z 2021-06-22T08:50:30Z 2019 Journal Article Rahardjo, H., Gofar, N., Satyanaga, A., Leong, E. C., Wang, C. L. & Wong, J. L. H. (2019). Effect of rainfall infiltration on deformation of Geobarrier Wall. Geotechnical and Geological Engineering, 37(3), 1383-1399. https://dx.doi.org/10.1007/s10706-018-0693-6 0960-3182 https://hdl.handle.net/10356/151491 10.1007/s10706-018-0693-6 3 37 1383 1399 en Grant Number: SUL2013-3 Geotechnical and Geological Engineering © 2018 Springer Science+Business Media. This is a post-peer-review, pre-copyedit version of an article published in Geotechnical and Geological Engineering. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10706-018-0693-6 application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering::Geotechnical
GeoBarrier System
Rainfall Infiltration
spellingShingle Engineering::Civil engineering::Geotechnical
GeoBarrier System
Rainfall Infiltration
Rahardjo, Harianto
Gofar, Nurly
Satyanaga, Alfrendo
Leong, Eng Choon
Wang, Chien Looi
Wong, Johnny Liang Heng
Effect of rainfall infiltration on deformation of Geobarrier Wall
description GeoBarrier system (GBS) is a system that combines geobag wall with capillary barrier concept as stabilization method against rainfall-induced failure, and vegetation as green cover. This paper presents deformation behaviour of a GBS wall constructed as pilot study when subjected to rainfall infiltration. The GBS wall was 4 m high with 70° slope angle. The wall was subjected to uniform surcharge of 10 kN/m2 and rainfall of 22 mm/h for 8 h. Recycled materials were used as components of the capillary barrier. Coupled deformation-seepage finite element analyses were carried out to evaluate the stress and pore-water pressure variations within and behind the GBS wall during and after rainfall. Limit equilibrium analyses were performed at various stages during and after rainfall to assess the near vertical wall stability. The results of the coupled deformation seepage analysis showed that the reinforced zone in the GBS remained unsaturated during rainfall, indicating that the GBS wall performed well in minimizing the rainwater infiltration. However, the GBS wall face deformation pattern altered during and after rainfall, indicating that the rainfall infiltration increased the lateral stress on the top part of the wall. The variation of lateral stress with depth agrees with field measurements from earth pressure cells.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Rahardjo, Harianto
Gofar, Nurly
Satyanaga, Alfrendo
Leong, Eng Choon
Wang, Chien Looi
Wong, Johnny Liang Heng
format Article
author Rahardjo, Harianto
Gofar, Nurly
Satyanaga, Alfrendo
Leong, Eng Choon
Wang, Chien Looi
Wong, Johnny Liang Heng
author_sort Rahardjo, Harianto
title Effect of rainfall infiltration on deformation of Geobarrier Wall
title_short Effect of rainfall infiltration on deformation of Geobarrier Wall
title_full Effect of rainfall infiltration on deformation of Geobarrier Wall
title_fullStr Effect of rainfall infiltration on deformation of Geobarrier Wall
title_full_unstemmed Effect of rainfall infiltration on deformation of Geobarrier Wall
title_sort effect of rainfall infiltration on deformation of geobarrier wall
publishDate 2021
url https://hdl.handle.net/10356/151491
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