Experimental Study of Dry Granular Flow and Impact Behavior Against a Rigid Retaining Wall
Experimental Study of Dry Granular Flow and Impact Behavior Against a Rigid Retaining Wall
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DOI：
10.1007/s00603-012-0293-3
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发表时间：
2013-07
影响因子：
6.2
通讯作者：
Yuan-jun Jiang;I. Towhata
中科院分区：
文献类型：
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作者：
Yuan-jun Jiang;I. Towhata
山区浅坡破坏是一种常见的突发灾害，对重要的交通要道和当地社区造成了严重的破坏。浅坡破坏引起的由岩石碎片和其他颗粒组成的干粒状流对挡土墙结构的影响尚未有系统的研究，目前的设计规范也未涵盖。为初步研究干颗粒流的冲击作用，对某型挡土墙进行了一系列干颗粒冲击试验。间接验证了挡土墙的总法向力由阻力（Fd）、重力和摩擦力（Fgf）和被动土力（Fp）组成，可以根据NF EN 1990（欧洲结构规范）中定义的经验公式进行计算。基础计算结构，AFNOR La平面圣德尼，2003年)。间接验证了在弗劳德数为6 ~ 11的流动中，阻力系数Cd可以用之前提出的经验参数来估计。
Shallow slope failure in mountainous regions is a common and emergent hazard in terms of its damage to important traffic routes and local communities. The impact of dry granular flows consisting of rock fragments and other particles resulting from shallow slope failures on retaining structures has yet to be systematically researched and is not covered by current design codes. As a preliminary study of the impact caused by dry granular flows, a series of dry granular impact experiments were carried out for one model of a retaining wall. It was indirectly verified that the total normal force exerted on a retaining wall consists of a drag force (Fd), a gravitational and frictional force (Fgf), and a passive earth force (Fp), and that the calculation ofFdcan be based on the empirical formula defined in NF EN Eurocode 1990 (Eurocode structuraux. Base de calcul des structures, AFNOR La plaine Saint Denis, 2003). It was also indirectly verified that, for flow with Froude number from 6 to 11, the drag coefficient (Cd) can be estimated using the previously proposed empirical parameters.