Assessment of the stability of the Bonifacio cliff using 3D geomechanical modelling

IF 4.9 2区工程技术 Q3 ENGINEERING, ENVIRONMENTAL

Bulletin of Engineering Geology and the Environment Pub Date : 2026-09-17 DOI:10.1007/s10064-026-05313-3

Alain Thoraval, Stella Coccia, Christian Franck, Baptiste Vignerot

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Abstract

The vertical rock cliff bordering the Upper Town of Bonifacio (Southern Corsica, France) is susceptible to large-scale instability, primarily due to the fracturing of the rock mass and the presence of a geological layer susceptible to erosion at the base of the cliff. Since 2018, this cliff has been the focus of several studies to improve understanding of rock hazards in the Bonifacio Citadel area and developing risk management scenarios to be implemented. This article presents the contribution of 3D geomechanical modeling to the assessment of cliff stability. These models enabled the characterization of large-scale instabilities based on different scenarios, considering uncertainties relating to the location and the extent of existing fractures. The impact of the cliff undercutting extension (due to maritime erosion) was also assessed. The movement evolution was analysed at the sensor locations installed in the modelled area. The analysis of these sensors positioning (constrained by urbanization at the time of installation) aims to ultimately optimize the site monitoring.

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利用三维地质力学模型评估Bonifacio悬崖的稳定性

与Bonifacio上城（法国南科西嘉岛）接壤的垂直岩壁容易发生大规模的不稳定，主要是由于岩体的破裂和岩壁底部易受侵蚀的地质层的存在。自2018年以来，这个悬崖一直是几项研究的重点，以提高对博尼法西奥城堡地区岩石危害的了解，并制定要实施的风险管理方案。本文介绍了三维地质力学建模对悬崖稳定性评估的贡献。考虑到现有裂缝的位置和范围的不确定性，这些模型能够基于不同情景对大规模不稳定性进行表征。此外，还评估了由于海洋侵蚀而造成的悬崖削底延伸的影响。分析了安装在模型区域内传感器位置的运动演化。分析这些传感器的定位（在安装时受到城市化的限制）旨在最终优化现场监测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合

CiteScore

7.10

自引率

11.90%

发文量

445

审稿时长

4.1 months

期刊介绍： Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.