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    2D visual characterisation of wedge failure types and locations on rock slopes
    (Springer, 2016) Turanboy, Alparslan
    This paper presents an easy and effective methodology that includes several submodels for the visual characterisation of the wedge structures, locations, and densities of all faced in situ polyhedral rock blocks on rock slope surfaces. A series of linear equations and classifying processes was derived to define the natural wedge blocks according to their basic boundary elements, specifically their edges, corners, and angles. In the developed model, wedge structures can be selected by a filtering process from the generated data set, which was recorded by using the scan-line technique. The study defines the intersection points between discontinuity traces on free surfaces. Kernel density estimation, a clustering tool, was used to display the density of 2D intersection points on the free surfaces of a rock slope. The developed methodology will help reduce rock structure complexity for many assessments related to rock mass applications, such as slope stability. The methodology was sampled on an experimental highway wall, and the results were consistent.
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    An approach for the probability of wedge failure in the excavation direction
    (Crc Press-Balkema, 2018) Turanboy, Alparslan; Ulker, Erkan; Kucuksutcu, Cahit Burak
    This paper aims to show the results of a methodology used in the analysis of rock slopes in terms of wedge failures based on assumed new surfaces in the excavation direction that links a well-developed database structure, visual representations, basic limit equilibrium analysis and statistical analyses. The method presented here is intended to clarify the complexity of the structure of rock slopes that include wedge blocks in the first step of the model. The structural data analyses used here consist of a series of sorting and filtering processes for which the raw data are derived from scan-line surveys in this step. In the second step, visual representations, spatial variability, size distributions. The last step of the developed model includes Monte Carlo simulation (MCs), which is devoted to assessing the instabilities of rock slopes based on actual and planned new excavation surfaces, which are named the Hypothetical Excavation Surfaces (HES) of the rock slopes. The developed model has been tested on a highway slope as a field experiment. The experimental slope has seemed to be unstable during an assumed excavation according to the results of the analyses.