IMHE OpenIR  > 山地灾害与地表过程重点实验室
Alternative TitlePhysical model experiments of dynamic interaction between debris flow and bridge pier model
王东坡1,2; 陈政2,3; 何思明2,3; 陈克坚4; 刘发明4; 李明清4
Source Publication岩土力学
Contribution Rank2
Other AbstractThe debris flows are recognised as a major threat to bridge piers located in mountainous gullies, especially in the areas of the active seismological and hydrologic region in Southwest China. It is important to build the dynamic evolution model and quantitatively describe the dynamic process of debris flow impacting bridge pier. In this study, all of the large-scale laboratory tests are conducted by using large multi-functional debris-flow simulation system. The main objectives of our experiments are to find the correlation between impacting pressures and variable factors including velocity, flow depth, and dimensionless characteristic parameters of fluid mechanics and to obtain the dynamic behaviour of bridge pier under the impact of debris flow. The experimental results and dimensionless analysis show that the dynamic process is mainly controlled by two dimensionless numbers of Froude number (Fr)and Reynolds number (Re). Generally, the dimensionless impact pressure is the function of Fr for the low-viscosity debris flows, while for the high-viscosity debris flows, it is the function of both Re and Fr. Different types of debris flows present significant differences in both the peak impacting pressure and impacting power spectrum. Under the same bulk density, the low-viscosity debris flow has greater impact energy than that of the high-viscosity debris flow. In addition, various types of debris flows are essentially distinguished by the critical Fr line. To provide technical support and scientific basis, we analysed the impact signals of different types of debris flows and discussed the mechanism of impact model.
Keyword泥石流 桥墩 冲击 物理模型试验
Indexed ByEI ; CSCD
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:6[CSCD]   [CSCD Record]
Document Type期刊论文
Corresponding Author王东坡
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
王东坡,陈政,何思明,等. 泥石流冲击桥墩动力相互作用物理模型试验[J]. 岩土力学,2019,40(9):3363-3372.
APA 王东坡,陈政,何思明,陈克坚,刘发明,&李明清.(2019).泥石流冲击桥墩动力相互作用物理模型试验.岩土力学,40(9),3363-3372.
MLA 王东坡,et al."泥石流冲击桥墩动力相互作用物理模型试验".岩土力学 40.9(2019):3363-3372.
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