• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of engineering geology and the environment >Impact of rock block characteristics on rockfall hazard and its implications for rockfall protection strategies along Himalayan highways: a case study
【24h】

Impact of rock block characteristics on rockfall hazard and its implications for rockfall protection strategies along Himalayan highways: a case study

机译：岩石砌块特征对喜马拉雅高速公路岩石保护策略的影响及其对岩石保护策略的影响 - 以案例研究

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Rock block characteristics are the controlling factors that define the potential rockfall volume, associated hazard and design of preventive practices. The present study defines a methodology to demonstrate the impact of block characteristics on rockfall hazard and its implications on the design of mitigative measures by analysing a recurring rockfall site along a critical highway corridor in NW Himalaya, India. The field data were quantitatively characterised for statistical distributions of size and volume of in situ as well as rockfall blocks. Possible block failures and rockfall initiation zones were predicted using modified kinematic analysis and distinct element method. The size and volume distributions as well as shapes were simulated against these predicted initiation zones to determine the cumulative impact of block characteristics on rockfall hazard by analysing the block kinetics and trajectories. It is found that the block initiation zones majorly govern the relative bounce height, kinetic energy, run-out distance and impact down the slope respective of block sizes and associated mass coupled with slope geometry. However, the effect of block shapes is observed to be minor compared to the blocks greater than a particular size range. Therefore, the design of rockfall protection such as barrier can be more effective when considering the kinetic energies of such block size range assisted by initiation zones. This study proposed that the knowledge of block size frequencies and rockfall initiation zones could provide a rational threshold for which a protection strategy can be designed and optimised to prevent rockfall hazard along the Himalayan highway corridors.
机译：岩石块特征是定义潜在岩石体积，相关危害和预防措施设计的控制因素。本研究定义了一种方法，证明块特征对岩石危害的影响及其对印度临界公路走廊的重复岩石站点来设计对减弱措施的影响。现场数据的定量表征用于原位和岩石块的大小和体积的统计分布。使用改进的运动分析和不同的元素方法预测可能的块故障和岩石发起区域。模拟这些预测启动区的大小和体积分布以及形状，以确定通过分析块动力学和轨迹来确定块特征对岩石危险的累积影响。发现块启动区主要地控制相对反弹高度，动能，流出距离，并撞击斜面尺寸和与斜坡几何形状的相关质量相应的斜面。然而，与大于特定尺寸范围的块相比，观察到块形状的效果是轻微的。因此，在考虑由发起区域辅助的这种块尺寸范围的动力学能量时，诸如屏障的岩石保护的设计可以更有效。该研究提出了块尺寸频率和岩石发起区域的知识可以提供一种理性的阈值，可以设计和优化保护策略，以防止沿着喜马拉雅公路走廊的岩石危险。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号