| dc.description.abstract | Taiwan is located at the boundary between the Philippine Sea Plate and Eurasian Plate. Thus, the tectonic plate activity is frequent. Geological structures such as folds, faults, and discontinuities play a critical role in the stability and behaviour of both natural and engineered rock slopes.
Traditional wedge block is defined by two discontinuities, slope top and slope face and slide alone the line of intersection. However, compared with Huang, C.T. and Shiah, L.Y., “A case study on the Nan-Ya landslide along the north coast highway” (1990), and the actual investigation of Nanya village. Wedge failure that occurs not only in the rock slope cut by two discontinuities, but most of them is cut by a third set of discontinuities (bedding).
In this study we use man made rock material to do physical test、centrifuge test and use 3DEC to simulate the result, in order to know its moving process under different ξ angle、bedding attitude and joint distribution.
From the result of this study, we can conclude that: (1) if the bedding is parallel to the line of intersection, block moving process is mostly planer failure. However if the bedding is perpendicular to the line of intersection, block moving process is mostly falling. (2) From the result of different ξ angle but same joint distribution. We found out that the block with ξ=120° has greater falling ratio than the block with ξ=90°. | en_US |