| dc.description.abstract | Vast mountainous areas due to the active geological activities can be observed throughout Taiwan. With the rapid growth of economy and population, more and more human activities have also been switched to the mountainous areas. Hence, disasters related to mountainous areas would result in the loss of lives and properties. For example, Hsien-du Mountain dip slope landslide destroyed Hsiaolin Village in 2009 and the National Highway No. 3 landslide event in 2010 also caused lives and properties. Therefore, it is crucial to study the failure mechanisms and the corresponding mitigation measures of relevant slopes.
In this study, we employed the simplified dip-slope model that was proposed by Zeng (2015) to conduct centrifuge tests and PFC simulation with rock anchor mitigation measures. Aluminum alloy and 3D-printed rock anchor models were chosen for the dip-slope model. Furthermore, prestress was also applied for the aluminum alloy rock anchor model. Centrifuge test results have shown that with alloy rock anchor, the collapsing conditions were improved significantly, while 3D-printed dip slope exhibit severe collapse of the slope, possibly due to the pull-out failure of the anchor.
Finally, the numerical models of PFC3D were verified by comparing with the centrifuge test results. Furthermore, a number of mitigation parameters such as length, location and prestress of the rock anchors were varied to explore the mitigation effects. Numerical simulation results have shown that the length, and location of the rock anchor could enhance the mitigation effects of the rock anchor, with proper applied prestress, the mitigation effect can also be improved. In addition, changing the angle of the rock anchor would reduce the mitigation effects. | en_US |