Effects of groundwater table position and soil properties on stability of slope during rainfall / Harianto Rahardjo in Journal of geotechnical and geoenvironmental engineering, Vol. 136 N° 11 (Novembre 2010)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 136 N° 11 (Novembre 2010) . - pp. 1555-1564 Titre : Effects of groundwater table position and soil properties on stability of slope during rainfall Type de document : texte imprimé Auteurs : Harianto Rahardjo, Auteur ; Alfrendo Satyanaga Nio, Auteur ; Eng-Choon Leong, Auteur Année de publication : 2011 Article en page(s) : pp. 1555-1564 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Rainfall intensity Groundwater table Residual soils Matric suction Permeability Shear strength Slope stability Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Rainfall, hydrological condition, and geological formation of slope are important contributing factors to slope failures. Parametric studies were carried out to study the effect of groundwater table position, rainfall intensities, and soil properties in affecting slope stability. Three different groundwater table positions corresponding to the wettest, typical, and driest periods in Singapore and four different rainfall intensities (9, 22, 36, and 80 mm/h) were used in the numerical analyses. Typical soil properties of two main residual soils from the Bukit Timah Granite and the sedimentary Jurong Formation in Singapore were incorporated into the numerical analyses. The changes in factor of safety during rainfall were not affected significantly by the groundwater table near the ground surface due to the relatively small changes in matric suction during rainfall. A delay in response of the minimum factor of safety due to rainfall and a slower recovery rate after rainfall were observed in slopes from the sedimentary Jurong Formation as compared to those slopes from the Bukit Timah Granite. Numerical analyses of an actual residual soil slope from the Bukit Timah Granite at Marsiling Road and a residual soil slope from the sedimentary Jurong Formation at Jalan Kukoh show good agreement with the trends observed in the parametric studies DEWEY : 624.1 ISSN : 1090-0124 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&s [...] [article] Effects of groundwater table position and soil properties on stability of slope during rainfall [texte imprimé] / Harianto Rahardjo, Auteur ; Alfrendo Satyanaga Nio, Auteur ; Eng-Choon Leong, Auteur . - 2011 . - pp. 1555-1564. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 136 N° 11 (Novembre 2010) . - pp. 1555-1564 Mots-clés : Rainfall intensity Groundwater table Residual soils Matric suction Permeability Shear strength Slope stability Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Rainfall, hydrological condition, and geological formation of slope are important contributing factors to slope failures. Parametric studies were carried out to study the effect of groundwater table position, rainfall intensities, and soil properties in affecting slope stability. Three different groundwater table positions corresponding to the wettest, typical, and driest periods in Singapore and four different rainfall intensities (9, 22, 36, and 80 mm/h) were used in the numerical analyses. Typical soil properties of two main residual soils from the Bukit Timah Granite and the sedimentary Jurong Formation in Singapore were incorporated into the numerical analyses. The changes in factor of safety during rainfall were not affected significantly by the groundwater table near the ground surface due to the relatively small changes in matric suction during rainfall. A delay in response of the minimum factor of safety due to rainfall and a slower recovery rate after rainfall were observed in slopes from the sedimentary Jurong Formation as compared to those slopes from the Bukit Timah Granite. Numerical analyses of an actual residual soil slope from the Bukit Timah Granite at Marsiling Road and a residual soil slope from the sedimentary Jurong Formation at Jalan Kukoh show good agreement with the trends observed in the parametric studies DEWEY : 624.1 ISSN : 1090-0124 En ligne : http://ascelibrary.aip.org/vsearch/servlet/VerityServlet?KEY=JGGEFK&ONLINE=YES&s [...]

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