Abstract
Landslide in Indonesia, specifically in Java island, occurs during rainy seasons. In Java island, it is known that the tropical red clay has the ability to stand at steep angles, while in stability analysis due to rainfall, practitioners only consider the rise of groundwater table. Previous studies states that one of the factor affecting factor of safety (FS) for tropical red clay slopes is the formation of saturated zones due to matric suction. This research studies the effect of rainfall intensity and duration to FS of cut-slopes as parametric study with probabilistic analysis for different height of 10m, 20m, and 30m also slope angles of 27°, 45°, 55°, and 70°. Rainfall parameter are taken from FTUI rainfall station for advanced pattern and three-days duration of rain. Analysis of seepage uses SEEP/W and slope stability uses SLOPE/W. It is known that the significant increase of probability of failure due to the three-days rainfall is achieved at the 10m height and 70°-angled slope. Increase of the probability of failure is mainly due to rainfall infiltration which saturates the surface and pore water pressure increase until certain time where infiltration stops and turn into surface run-off.
Highlights
IntroductionRainfall intensity is one of the primary factor of landslides causes [1]
In Indonesia, according to National Board of Disaster Management (BNPB) landslide data throughout 20132016, there are at least 184 landslides happened in West Java, for example, whereas 150 landslides out of the 184 landslides occurred due to the effect of rainfall and unstable structure of the soil.Rainfall intensity is one of the primary factor of landslides causes [1]
The aim of the research is to examine the effect of rainfall intensity and duration as well as the effect of variation of cut-slope geometry to the factor of safety (FS) of the tropical red clay as one of the typical residual soil found in Java
Summary
Rainfall intensity is one of the primary factor of landslides causes [1] This is closely related to the condition of Indonesia as one of the tropical nations which have high intensity rainfall. Cut-slopes in Indonesia, under the guidelines for excavated slope or cut-slopes in volcanic and residual soil by the Ministry of Public Works, accommodates only the change of groundwater table for rainfall effect [2]. This method is not entirely suitable to all cases whereas one of the causes of landslides caused by rainfall is due to the formation of saturated zones near the ground surface [3, 4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
