Development and calibration of an improved model for analysis of rock fall hazards on highways and railways

公路和铁路落石灾害分析改进模型的开发和校准

• 批准号: 380492-2008
• 负责人: Hungr, Oldrich
• 金额: $ 0.58万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=463139
• 关键词: Development; calibration; improved; model; analysis

Dynamic analysis of rock fall motion ("rock fall ballistics") is used in practice to obtain design paramaters for structures protecting transportation routes such as road and railways, or buildings from damage due to rocks falling from cliffs. The main design parameters required are: 1) the height of fock fall trajectories above ground (to determine the required size of the protective fence or similar) and 2) the potential impact forces excerted by rock fragments on the structure. Although there are several computer-based models available that claim to be able to predict these parameters, the predictions are known to be highly unreliable. This is due to overly-simplified and poorly-calibrated physical representation of interactions between the falling fragment and the slope. Based on our long experience in this field, we propose to conduct a focussed research with the purpose of improving the predictive performance of such models. Increased reliability and reduced cost of remedial structures on roads and railways will result.

岩石坠落运动的动态分析（“岩石坠落弹道学”）在实践中用于获得保护公路和铁路等交通路线或建筑物免受悬崖岩石坠落损坏的结构的设计参数。 所需的主要设计参数为：1）落岩轨迹离地面的高度（以确定防护栅栏或类似物的所需尺寸）和2）岩石碎片对结构产生的潜在冲击力。 虽然有几个基于计算机的模型声称能够预测这些参数，但已知这些预测是高度不可靠的。 这是由于坠落碎片和斜坡之间相互作用的物理表示过于简化和校准不良。 基于我们在这一领域的长期经验，我们建议进行重点研究，目的是提高这些模型的预测性能。 公路和铁路补救结构的可靠性将得到提高，费用也将降低。