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Stability Assessment of Coastal Cliffs Incorporating Laser Scanning Technology and a Numerical Analysis

机译：结合激光扫描技术的沿海悬崖稳定性评估及数值分析

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We investigated the cliff coast in Jastrzebia Gora, Poland. The measurements that were taken between 2014 and 2018 by applying terrestrial, mobile, and airborne laser scanning describe a huge geometric modification involving dislocations in a 2.5 m range. Differential maps and a volumetric change analysis made it possible to identify the most deformed cliff’s location. Part of the monitoring of coastal change involved the measurement of a cliff sector in order to determine the soil mass flow down the slope. A full geometric image of the cliff was complemented by a stability assessment that incorporated numerical methods. The analysis showed that the stability coefficients, assuming a particular soil strata layout and geotechnical parameters, are unsafely close to the limit value. Moreover, the numerical computations, which were performed under simplifying assumptions, were not able to capture a multitude of other random factors that may have an impact on the soil mass stability. Thus, displacements of both reinforced soil and gabions were detected that are intended to prevent the cliff from deforming and to protect the infrastructure in its vicinity. The array of applied measurement methods provides a basis for the development of research aimed at optimization of applied tools, safety improvements, and a rapid reaction to threats.
机译：我们调查了波兰Jastrzebia Gora的悬崖海岸。在2014年至2018年之间通过应用地面，移动和机载激光扫描进行的测量描述了巨大的几何变形，其中涉及2.5 m范围内的位错。差分图和体积变化分析使识别变形最大的悬崖的位置成为可能。沿海变化监测的一部分涉及对悬崖部分的测量，以确定沿斜坡的土壤质量流量。悬崖的完整几何图像得到了结合数值方法的稳定性评估的补充。分析表明，假设特定的土壤层布局和岩土参数，稳定系数不安全地接近极限值。此外，在简化的假设下进行的数值计算无法捕获可能影响土壤质量稳定性的众多其他随机因素。因此，检测到钢筋土和石笼网都发生位移，目的是防止悬崖变形并保护其附近的基础设施。一系列应用的测量方法为开展旨在优化应用工具，提高安全性和对威胁的快速反应的研究奠定了基础。

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