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Three-Dimensional Stability Analysis of Rock Slope Using Aerial Photogrammetry Data

机译：空中摄影测量数据岩石坡的三维稳定性分析

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摘要

The performance and maintenance of infrastructure assets passing through rock cuts depend on the stability of the rock slopes. Most of the previous slope stability works used simplistic two-dimensional slope analysis due to the limitations in analysis software and data collection methods. Three-dimensional understanding of the slope behavior is necessary to estimate the factor of safety of slopes with complex geometry. Three-dimensional analysis conducted in this research is based on method of columns which is an extension of method of slices considered for most two-dimensional analyses. This analysis requires comprehensive data collection of slope geometry, but the present traditional methods are limited by their inaccessibility to hard-to-reach areas on the steep rock slopes. The advancement in lightweight compact sensors complimenting the robust unmanned aerial platforms have found their applications in remotely conducting quantitative assessments of infrastructure assets. The research presented in this study discusses the usage of aerial photogrammetry in collecting rock slope data and three-dimensional stability analysis using commercially available software in which the generalized Hoek-Brown (HK) failure criterion is used to represent the true failure envelope of rock mass. Morgenstern-Price stability analysis method was used to evaluate the global minimum factor of safety. This approach has resulted in significant savings in data collection time and cost, but also provided comprehensive idea about the stability of rock slopes for a given set of material properties.
机译：通过岩石切割的基础设施资产的性能和维护取决于岩石斜坡的稳定性。由于分析软件和数据收集方法的限制，大多数以前的斜坡稳定性起作用使用了简单的二维斜率分析。需要三维理解坡度行为，以估计复杂几何形状的斜坡安全因子。本研究中进行的三维分析是基于列的方法，该方法是考虑大多数二维分析的切片方法的延伸。该分析需要倾斜几何形状的全面数据收集，但是目前的传统方法受到陡峭岩石斜坡上的难以到达区域的可接触的限制。轻质紧凑型传感器的进步，恭维强大的无人机平台已经发现它们在远程进行基础设施资产的定量评估时的应用。本研究中提出的研究讨论了空中摄影测量的使用，采用商业上可获得的软件在收集摇滚数据和三维稳定性分析中，其中广义Hoek-棕色（HK）故障标准用于代表岩体的真实故障包络。 Morgenstern-Price稳定性分析方法用于评估全局最小安全系数。这种方法导致数据收集时间和成本显着节省，而且还提供了关于岩石斜坡稳定性的全面思路，用于给定的一套材料特性。

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