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Assessment of the instability hazard of a granite boulder

机译：评估花岗岩巨石的不稳定性危害

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This paper aims to assess the instability hazard of a granite boulder. The procedure was first to consider the geological setting and geomorphologic features of the boulder in relation to typical granite landscape forms. Climatic and seismic data werenext obtained from different sources, and geomechanical parameters were measured in situ and in the laboratory, with terrestrial laser scanning techniques used to measure shape and volume and to conduct a detailed survey of the boulder. Different analytical approaches were then applied to the calculation of boulder safety factors against sliding and toppling. Since the boulder was considered to be unstable in the worst possible scenario, a particle code approach was used to determine its fall trajectory, calculate the final run out of the block, and assess the risk for houses located at the foot of the slope. Finally, conclusions were drawn regarding the instability hazard, and recommendations were made in regard to definitively stabilizing the granite boulder.
机译：本文旨在评估花岗岩巨石的不稳定性危害。该程序首先要考虑与典型花岗岩景观形式相关的巨石的地质环境和地貌特征。随后从不同来源获得气候和地震数据，并使用地面激光扫描技术测量形状和体积并进行巨石的详细测量，并在现场和实验室中测量了地质力学参数。然后将不同的分析方法应用于抗滑移和倒塌的巨石安全系数的计算。由于在最坏的情况下认为巨石是不稳定的，因此使用了粒子编码方法来确定其坠落轨迹，计算最终滑出块体并评估位于斜坡脚下的房屋的风险。最后，就不稳定性危害得出了结论，并就确定稳定花岗岩石块提出了建议。

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