The Heather Hill landslide: an example of a large scale toppling failure in a natural slope
The Heather Hill landslide: an example of a large scale toppling failure in a natural slope
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DOI：
10.1139/t91-051
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发表时间：
1991-06
影响因子：
3.6
通讯作者：
M. Pritchard;K. Savigny
中科院分区：
文献类型：
--
作者：
M. Pritchard;K. Savigny
本文调查了不列颠哥伦比亚省冰川国家公园海狸谷沿线的倒塌与大型深层山体滑坡之间的可疑关系。研究区域包括希瑟山滑坡（山谷中的几处滑坡之一）以及显示出不同程度的倾倒扰动的邻近斜坡。使用数值分析的离散元方法模拟了 Heather Hill 滑坡的发展过程。使用可变形柱对岩体进行建模，其边界代表原位不连续模式的粗略近似。通过改变柱厚度和材料特性来模拟主要岩性的插层变化和不连续间距的伴随变化。分析证实，倾覆过程可能会形成深层破坏面。岩性的插层变化和不连续间距的相关变化解释了曲线破坏面和头顶位置...
This paper is an inquiry into the suspected relationship between toppling and large deep-seated landslides along the Beaver Valley, Glacier National Park, British Columbia. The study area includes the Heather Hill landslide, one of several in the valley, and adjacent slopes that show varying degrees of toppling disturbance. The development of the Heather Hill landslide is simulated using the distinct element method of numerical analysis. The rock mass is modelled using deformable columns whose boundaries represent a coarse approximation of in situ discontinuity patterns. An intercalated change in the predominant lithologies and a concomitant change in discontinuity spacings are modelled by varying column thickness and material properties. The analysis confirms that a deep-seated failure surface can develop as a result of the toppling process. The intercalated change in lithologies and the related change in discontinuity spacings account for the curvilinear failure surface and the headscarp position of the...