Universiti Teknologi Malaysia Institutional Repository

The effect of capillary barrier on mitigating rainfall-induced slope failure

Gofar, Nurly and Adhitya, Bimo Brata and Ma'ruf, Mokhammad Farid (2010) The effect of capillary barrier on mitigating rainfall-induced slope failure. In: The 8th International Conference on Geotechnical and Transportation Engineering (Geotropika 2010), 1-3 December 2010, Kota Kinabalu, Sabah.

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Abstract

Soil cover with capillary barrier layer is a potential method for limiting the deep infiltration of rain water into soil mass. The method is widely applied in the construction of landfill and lately was considered for mitigating rainfall induced slope failure. This paper presents the results of numerical analysis carried out using SEEP/W to study the effect of changing permeability on the effectiveness of soil cover as capillary barrier. Analyses were performed for different configurations of where transport layer was placed on original soil and overlaid by compacted soil cover. The slope was subjected to various rainfall intensities obtained from Intensity-Duration-Frequency (IDF) curve of Johor Bahru. The properties of original soil used for the analysis were derived from the results of laboratory test on sandy silt soil found at Universiti Teknologi Malaysia (UTM) Skudai Campus. Concrete sand was used for transport layer while compacted original soil was used for slope cover system. It is assumed that all layers are completely separated and both intrusion of coarse particle and pumping of fine particles do not occur. Numerical analysis shows that the configuration used in this study is able to inhibit deep infiltration of rainwater into slope. The optimum configuration comprises 25 cm soil cover 5 cm transport layer.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Rainfall-induced slope failure, Capillary barrier, Numerical simulation
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Civil Engineering
ID Code:24348
Deposited By: Mrs Liza Porijo
Deposited On:29 Aug 2012 04:49
Last Modified:02 Jul 2017 04:36

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