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Considerations Relevant to the Stability of Granite Boulders
Rock Mechanics and Rock Engineering ( IF 6.2 ) Pub Date : 2021-06-04 , DOI: 10.1007/s00603-021-02525-9
L. R. Alejano , I. Pérez-Rey , M. Múñiz-Menéndez , A. Riquelme , G. Walton

Granite boulders are characteristic geomorphological structures formed in granitic terrains. Due to their formation process associated with typical spheroidal weathering phenomena, they tend to show more or less ellipsoidal shapes prone to instability, and they often lie on small contact surfaces. Analyzing the stability of these boulders is not a straightforward task. First, these boulders may topple or slide. Additionally, their typically irregular geometry and uneven contact with the surface where they lie makes the analysis more complex. The authors have identified some critical issues that are relevant to characterize these boulders from a rock mechanics point of view, with the aim of estimating the stability of boulders. In particular, an accurate description of the geometry of the boulder is necessary to perform accurate toppling calculations. Additionally, the contact area and the features of the contact plane need to be known in detail. The study is intended to serve as a guideline to address the stability of these granite boulders in a rigorous way, since standard rock mechanics approaches (planar failure, toppling stability, standard rock joint strength criteria, etc.) may not be directly applicable to these particular cases.



中文翻译:

与花岗岩巨石稳定性相关的注意事项

花岗岩巨石是在花岗岩地形中形成的特征地貌结构。由于它们的形成过程与典型的球状风化现象相关,它们往往或多或少地呈现出容易不稳定的椭圆体形状,并且它们通常位于小接触面上。分析这些巨石的稳定性并不是一项简单的任务。首先,这些巨石可能会倾倒或滑动。此外,它们通常不规则的几何形状以及与它们所在表面的不均匀接触使分析变得更加复杂。作者从岩石力学的角度确定了一些与表征这些巨石相关的关键问题,目的是估计巨石的稳定性。特别是,准确描述巨石的几何形状对于执行准确的倾倒计算是必要的。此外,需要详细了解接触面积和接触面的特征。该研究旨在作为指导以严格的方式解决这些花岗岩巨石的稳定性问题,因为标准岩石力学方法(平面破坏、倾覆稳定性、标准岩石接头强度标准等)可能无法直接适用于这些特殊情况。

更新日期:2021-06-05
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