Role of unsaturated soil properties in the development of slope susceptibility map
A slope susceptibility map which incorporates unsaturated soil mechanics is imperative to accurately locate areas susceptible to rainfall-induced slope failures. This study aimed to develop slope susceptibility maps for zonations within Jurong Formation residual soils in Singapore with the incorpora...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/159823 |
| _version_ | 1826120515893329920 |
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| author | Satyanaga, Alfrendo Rahardjo, Harianto |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Satyanaga, Alfrendo Rahardjo, Harianto |
| author_sort | Satyanaga, Alfrendo |
| collection | NTU |
| description | A slope susceptibility map which incorporates unsaturated soil mechanics is imperative to accurately locate areas susceptible to rainfall-induced slope failures. This study aimed to develop slope susceptibility maps for zonations within Jurong Formation residual soils in Singapore with the incorporation of unsaturated soil parameters. Slope susceptibility maps were developed through 1-D seepage analyses using Transient Rainfall Infiltration and Grid-Based Regional Slope-Stability Model (TRIGRS) and 3-D slope stability analyses using Scoops3D. Laboratory testing of soil properties and 2-D seepage and slope stability analyses were conducted to evaluate the results from the slope susceptibility map. Comparison between the slope susceptibility map and the results from 2-D analyses showed that the factors of safety from the slope susceptibility map were consistently lower than those of 2-D analyses. Therefore, the proposed method incorporating unsaturated soil in the development of a slope susceptibility map was concluded to be reasonable on the conservative side. |
| first_indexed | 2024-10-01T05:17:43Z |
| format | Journal Article |
| id | ntu-10356/159823 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:17:43Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1598232022-07-06T05:39:12Z Role of unsaturated soil properties in the development of slope susceptibility map Satyanaga, Alfrendo Rahardjo, Harianto School of Civil and Environmental Engineering Engineering::Civil engineering::Geotechnical Slopes – Stabilisation Geotechnical Engineering Site Investigation A slope susceptibility map which incorporates unsaturated soil mechanics is imperative to accurately locate areas susceptible to rainfall-induced slope failures. This study aimed to develop slope susceptibility maps for zonations within Jurong Formation residual soils in Singapore with the incorporation of unsaturated soil parameters. Slope susceptibility maps were developed through 1-D seepage analyses using Transient Rainfall Infiltration and Grid-Based Regional Slope-Stability Model (TRIGRS) and 3-D slope stability analyses using Scoops3D. Laboratory testing of soil properties and 2-D seepage and slope stability analyses were conducted to evaluate the results from the slope susceptibility map. Comparison between the slope susceptibility map and the results from 2-D analyses showed that the factors of safety from the slope susceptibility map were consistently lower than those of 2-D analyses. Therefore, the proposed method incorporating unsaturated soil in the development of a slope susceptibility map was concluded to be reasonable on the conservative side. Building and Construction Authority (BCA) Submitted/Accepted version The authors would like to acknowledge the funding support from the Building Construction Authority and the sharing of data from the Singapore Land Authority, who are collaborators in the project on ‘The development of slope management and susceptibility geographical information system’. 2022-07-06T05:39:12Z 2022-07-06T05:39:12Z 2022 Journal Article Satyanaga, A. & Rahardjo, H. (2022). Role of unsaturated soil properties in the development of slope susceptibility map. Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 175(3), 276-288. https://dx.doi.org/10.1680/jgeen.20.00085 1353-2618 https://hdl.handle.net/10356/159823 10.1680/jgeen.20.00085 3 175 276 288 en Proceedings of the Institution of Civil Engineers - Geotechnical Engineering © 2022 ICE Publishing. All rights reserved. This paper was published in Proceedings of the Institution of Civil Engineers - Geotechnical Engineering and is made available with permission of ICE Publishing. application/pdf |
| spellingShingle | Engineering::Civil engineering::Geotechnical Slopes – Stabilisation Geotechnical Engineering Site Investigation Satyanaga, Alfrendo Rahardjo, Harianto Role of unsaturated soil properties in the development of slope susceptibility map |
| title | Role of unsaturated soil properties in the development of slope susceptibility map |
| title_full | Role of unsaturated soil properties in the development of slope susceptibility map |
| title_fullStr | Role of unsaturated soil properties in the development of slope susceptibility map |
| title_full_unstemmed | Role of unsaturated soil properties in the development of slope susceptibility map |
| title_short | Role of unsaturated soil properties in the development of slope susceptibility map |
| title_sort | role of unsaturated soil properties in the development of slope susceptibility map |
| topic | Engineering::Civil engineering::Geotechnical Slopes – Stabilisation Geotechnical Engineering Site Investigation |
| url | https://hdl.handle.net/10356/159823 |
| work_keys_str_mv | AT satyanagaalfrendo roleofunsaturatedsoilpropertiesinthedevelopmentofslopesusceptibilitymap AT rahardjoharianto roleofunsaturatedsoilpropertiesinthedevelopmentofslopesusceptibilitymap |