Rockslide run-out prediction from distinct element analysis
Rockslide run-out prediction from distinct element analysis
复制标题
根据不同元素分析预测岩体滑坡跳动
DOI：
10.1080/17486020902767321
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
D. P. Moore
中科院分区：
文献类型：
--
作者：
L. Lorig;A. Watson;C. Martin;D. P. Moore
棋盘溪岩坡位于雷夫尔斯托克大坝上游 1.5 公里处，雷夫尔斯托克大坝蓄水加拿大不列颠哥伦比亚省的哥伦比亚河。 2004 年完成的详细调查表明，2 至 300 万立方米的岩石斜坡正以每年约 10 毫米的速度向水库移动。有人担心，如果缓慢移动的岩石滑坡的一部分迅速加速进入水库，由此产生的波浪可能会冲过大坝。使用 UDEC 进行不同的元素分析，以评估潜在的岩石滑坡跳动特征（岩石体积、厚度和速度的时间历史）。 Voronoi 镶嵌方案用于创建岩石结构，使移动的岩石斜坡能够分解。通过改变以下四个因素来研究滑动行为的范围：（1）用于模拟恢复系数以及跳动期间的能量损失的阻尼类型和量； (2)运动时接触摩擦角； (3)水库效应； (4) 岩石碎片尺寸。这些分析的结果被用作物理波模型研究的输入。
The Checkerboard Creek Rock Slope is located 1.5 km upstream of the Revelstoke Dam, which impounds the Columbia River in British Columbia, Canada. A detailed investigation completed in 2004 indicated that 2 to 3 million m3 of a rock slope was moving toward the reservoir at rate of approximately 10 mm/year. There was concern that, if a portion of the slow-moving rockslide accelerated rapidly into the reservoir, the resultant wave could overtop the dam. Distinct element analyses were carried out using UDEC to assess potential rockslide run-out characteristics (time histories of rock volume, thickness and velocity). A Voronoi tessellation scheme was used to create a rock fabric that allowed the moving rock slope to disaggregate. The range of slide behaviours was investigated by varying the following four factors: (1) type and amount of damping used to simulate the coefficient of restitution and, thus, energy loss during run-out; (2) friction angle of contacts during movement; (3) reservoir effects; and (4) rock fragment sizes. The results from these analyses were used as input to a physical wave model study.