TY - JOUR
T1 - Characteristics of rainfall-induced slope instability in Cisokan Region, Indonesia
AU - Krisnanto, Sugeng
AU - Rahardjo, Harianto
AU - Kartiko, Rendy Dwi
AU - Satyanaga, Alfrendo
AU - Nugroho, Joko
AU - Mulyanto, Netto
AU - Santoso, Pudjo
AU - Hendiarto, Achmad
AU - Pamuji, Didit Beny
AU - Rachma, Saraswati Noor
N1 - Publisher Copyright:
© 2021 Published by ITB Institute for Research and Community Services.
PY - 2021/10/4
Y1 - 2021/10/4
N2 - A 25.5 km long access road has been constructed in a hilly area in Cisokan region. Several slope instabilities occurred during the rainy season, particularly at the end of heavy rainfall. A comprehensive study was performed to understand the characteristics of rainfall-induced slope instability. The study consisted of field observation, analyses of field and laboratory test data, and numerical analyses. The study revealed that in general there were two categories of slopes with instability characteristics: (i) slopes with a significant groundwater level increase during rainfall; (ii) slopes with an insignificant groundwater level increase during rainfall. In the first category, the slope instability was caused by a loss of matric suction and eventually the pore-water pressure, uw became positive as indicated by an increase of the groundwater level. In the second category, the slope instability was caused by a loss of matric suction without a rise in pore-water pressure, uw, to a positive magnitude. Two empirical curves of slope stability were developed as a preliminary guidance to assess slope stability during rainfall in the region.
AB - A 25.5 km long access road has been constructed in a hilly area in Cisokan region. Several slope instabilities occurred during the rainy season, particularly at the end of heavy rainfall. A comprehensive study was performed to understand the characteristics of rainfall-induced slope instability. The study consisted of field observation, analyses of field and laboratory test data, and numerical analyses. The study revealed that in general there were two categories of slopes with instability characteristics: (i) slopes with a significant groundwater level increase during rainfall; (ii) slopes with an insignificant groundwater level increase during rainfall. In the first category, the slope instability was caused by a loss of matric suction and eventually the pore-water pressure, uw became positive as indicated by an increase of the groundwater level. In the second category, the slope instability was caused by a loss of matric suction without a rise in pore-water pressure, uw, to a positive magnitude. Two empirical curves of slope stability were developed as a preliminary guidance to assess slope stability during rainfall in the region.
KW - Empirical slope stability curve
KW - Field observation
KW - Numerical analysis
KW - Rainfall-induced slope instability
KW - Unsaturated soil
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U2 - 10.5614/j.eng.technol.sci.2021.53.5.4
DO - 10.5614/j.eng.technol.sci.2021.53.5.4
M3 - Article
AN - SCOPUS:85120074310
SN - 2337-5779
VL - 53
JO - Journal of Engineering and Technological Sciences
JF - Journal of Engineering and Technological Sciences
IS - 5
M1 - 210504
ER -