摘要
泥石流对构筑物的冲击破坏,常常是由泥石流中的大块石冲击所致,因此大块石冲击力的计算在泥石流防治工程设计中就显得非常重要。但目前有关泥石流冲击力的计算方法都比较粗糙,计算结果偏大,计算过程繁琐,不便快速用于工程实践。为此,以弹塑性理论为基础,结合试验引入合理假设,提出了常见几类泥石流防治结构的冲击力计算方法,并给出了相应的计算公式。结果表明,泥石流防护结构的刚度对大块石的冲击力有重要影响,简支结构的吸能效果高于防撞墩。
Impact damage of debris flow to construclion is usually caused by block stone in the debris flow, so how to calculate impact force accurately becomes very important in its control engineering design. However, the available methods at present are not perfect and the results predicted are on the larger side. Furthermore, the calculation processes are too tedious to use conveniently in engineering practice. Here, taking elastic-plastic theory as a foun- dation, and some reasonable assumptions that is based on test, a new method to calculate the maximum impact force were put forward for several debris flow-controlling structures. The result shows that the stiffness of the controlling structures has a great influence on the value of impact force and the energyu-absorptive capacity of the simple supported structure is higher than that of anti-collision pile.
出处
《自然灾害学报》
CSCD
北大核心
2009年第5期51-56,共6页
Journal of Natural Disasters
基金
国家重点基础研究发展计划(2008CB425802)
国家自然科学基金资助项目(40872181)
关键词
泥石流
防护结构
冲击力
能量守恒
debris flow
protection construction
impact force
energy conservation
作者简介
作者简介：何思明（1968-），男，研究员，博士，主要从事山地灾害形成机理及防治技术研究．E-mail：hgm112003@yahoo．com．cn.
