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本文通过在拦砂坝上安装冲击力传感器测量冲击力值,详细分析不同容重泥石流,不同沟 道坡度及不同拦砂坝迎水面倾角等因素下泥石流对拦砂坝坝体的冲击作用。 山洪和泥石流携带的大石块的冲击力是造成结构破坏的主要原因之一。 推导了冲击力的弹塑性修正模型,发现形状不规则的大石块对冲击力的影响显着。 本文以 Hertz 接触理论为基础,在考虑构筑物 弹塑性特性的基础上推导了泥石流大块石的冲击力 计算方法,以便更真实地反映泥石流大块石对构筑 物的冲击过程和响应,为泥石流防护结构设计提供 更为可信的计算方法。
泥石流冲击桥墩涉及到两个关键问题,一个是泥石流冲击桥墩的冲击力演化特征,另一个是泥石流冲击桥墩后的绕流特征。 本文将泥石流巨石冲击力的研究分成滚石在空气和泥浆两种介质中的冲击力研究,假设无论在何种介质下,滚石和被撞物体撞击瞬间,滚石冲击力计算公式中与质量、弹性模量和速度的关系式是不变的。 泥石流是一种世界范围内各个历史时期均普遍发生的地质灾害现象,尤其频发于地震多发的山地地区,每年均给人民的生命财产造成重大损失.为了应对这种暴发突然,来势凶猛,破坏力强的泥石流灾害,一系列防治措施应运而生.系统总结泥石流的防治措施.
本文开展了系列泥石流冲击实验,并利用Tactilus内置式压力分布测量传感器测量冲击力数据,以此来探究不同密度泥石流作用于坝体时冲击力的时空分布特性。 实验结果表明,低密度泥石流冲起爬高时,在坝体范围内冲击力时程变化的波动更为剧烈,持续时间也更长。
泥石流冲击力的野外测量 胡凯衡1,2,韦方强1,洪 勇1,黎小宇1 FIELD MEASUREMENT OF IMPACT FORCE OF DEBRIS FLOW 摘要 图/表 参考文献 相关文章 (15) 本文开展了系列泥石流冲击实验,并利用Tactilus内置式压力分布测量传感器测量冲击力数据,以此来探究不同密度泥石流作用于坝体时冲击力的时空分布特性。 基于本文的实验结果,可以提供一种基于概率统计的泥石流冲击力计算方法,即通过实际调查泥石流粗颗粒粒径、流速、密度等物理特性,确定泥石流冲击力概率密度函数,然后结合工程实例,以一定的累积概率值确定泥石流冲击力工程设防值。
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