Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151649
Title: Sensing and monitoring for assessment of rainfall-induced slope failures in residual soil
Authors: Rahardjo, Harianto
Satyanaga, Alfrendo
Keywords: Engineering::Civil engineering::Geotechnical
Issue Date: 2019
Source: Rahardjo, H. & Satyanaga, A. (2019). Sensing and monitoring for assessment of rainfall-induced slope failures in residual soil. Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 172(6), 496-506. https://dx.doi.org/10.1680/jgeen.18.00208
Journal: Proceedings of the Institution of Civil Engineers - Geotechnical Engineering
Abstract: Real-time monitoring can be used to assess the effect of climatic conditions on slope stability. However, this can be costly. There is therefore need for a methodology to select critical slopes for stability monitoring using comprehensive field instrumentation throughout the year. In this study, the Transient rainfall infiltration and grid-based regional slope stability (TRIGRS) model was used to generate a slope susceptibility map (SSM) of Singapore. This model was selected as it can incorporate unsaturated soil properties in spatial analyses of water infiltration and factor of safety (FoS) calculations. Available studies on establishing SSMs by incorporating unsaturated soil mechanics principles are limited and most focus on mountainous areas. This paper presents relatively new research on the development of a SSM for a densely populated area like Singapore. The study area was limited to residual soil from Bukit Timah Granite in Singapore. TRIGRS helped to determine zones that are highly susceptible to failure; the instrumentation can be used to monitor high-risk areas during dry and rainy periods. A selected slope was instrumented with tensiometers, moisture sensors, piezometers and a rain gauge, all connected to a data logger for real-time monitoring. The changes in pore-water pressure and soil moisture with time during wet and dry periods were used for slope stability analyses. FoS variations over time can be used to assess slope stability, especially during periods of heavy rainfall.
URI: https://hdl.handle.net/10356/151649
ISSN: 1353-2618
DOI: 10.1680/jgeen.18.00208
Rights: © 2019 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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