A LABORATORY SCALE OF PHYSICAL MODELING OF SLOPE FAILURE GENERATED BY CENTRIFUGAL ACCELERATION WITH SEVERAL WATER CONTENT SCENARIOS

• Main Author: Wicaksana, Yudhidya
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/55621
• Institution: Institut Teknologi Bandung

Slope stability is one of the most important factors in the surface mining operation. Slope stability analysis can be conducted using analytical method, numerical approach or physical modeling. A laboratory scale experimentation to study slope failure mechanism and consequence was performed by using centrifuge which was built in house by the Laboratory of Geomechanics & Mining Equipment of ITB. The material used in this study is clayey silt with geometry of 15 cm height and 35° slope angle. Centrifugal acceleration with the maximum of 3.81g was applied to the slope model with the variation of water content of 0%, 5%, 10% and 15%. By spinning the centrifuge at the different level of acceleration and water contents, the slope failure mechanism and collapsed slope model were investigated. Generally, the applied centrifugal acceleration to initiate the slope failure gets larger when the water content of the slope model increases. This phenomenon indicates that the highest water content will result the highest cohesion. To measure the consequence, four cameras were attached to capture the slope condition during the test. Digital image correlation was used to digitize the pre-failure and post-failure slope surface condition which can be overlaid to measure the volume of collapsed slope model. In addition, general relationship between cohesion and centrifugal acceleration in centrifuge modeling was calculated using dimensional analysis.