Development A Boundary of Rainfall-Induces the Stability of A Residuals Soils Slope in Northern Territory, Australia

A S, Muntohar and Muhammad, Suradi and A, Fourie (2014) Development A Boundary of Rainfall-Induces the Stability of A Residuals Soils Slope in Northern Territory, Australia. In: Seminar Nasional Geoteknik, 10-11 Juni 2014, Yogyakarta, Indonesia.

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Abstract

Seepage and slope stability issues concerning infiltration in unsaturated slopes are investigated and presented. A two dimensional finite element analysis are used to examine the effects of the rainfall intensity on the stability of a slope in the tropical region and to develop a boundary of the rainfall induced slope instability. The Jabiru landslide occurred in March 2007 after severe rainstorm with rainfall amount of 0.8 m in 3 days. This landslide occurred at a soil slope with a height of 23 m and angle of 19 degrees. Parametric study was performed to find out which cases with respect to rainfall intensity and total rainfall triggering the landslide occurrence. Under a uniform distributed rainfall, duration of rainfall is more significant to cause slope failure rather than the rainfall intensity. For any rainfall intensity, if the duration of rainfall lesser than 4 days, the slope was unlikely to fail. The ratio of rainfall intensity and hydraulic conductivity (I/ksat) greater than one caused rapid change the factor of safety of slope. For a rainfall intensity, I/ksat = 0.25 did not trigger slope failure since the factor of safety was obviously greater than two (FS > 2) for all depth. Keywords: rainfall, infiltration, matric suction, slope stability, residual soil

Item Type: Conference or Workshop Item (Speech)
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Department of Civil Engineering > Teknik Konstruksi Gedung
Depositing User: Ir. Muhammad Suradi, MEngSt, PhD.
Date Deposited: 05 Aug 2019 06:11
Last Modified: 30 Dec 2019 12:32
URI: http://repository.poliupg.ac.id/id/eprint/960

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