INFLUENCE OF SEDIMENT GRADATION ON SCOUR DOWNSTREAM OF BLOCK RAMPS
INFLUENCE OF SEDIMENT GRADATION ON SCOUR DOWNSTREAM OF BLOCK RAMPS
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泥沙级配对坡道下游冲刷的影响
DOI：
10.1061/(asce)0733-9429(2007)133:11(1241
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发表时间：
2007
影响因子：
2.4
通讯作者：
S. Pagliara
中科院分区：
文献类型：
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作者：
S. Pagliara
块体斜坡下游冲刷过程是一个具有工程实用价值的重要研究课题。本试验研究的目的是检验冲刷机理，以预测块体斜坡下游冲刷坑的主要几何参数。使用位于意大利比萨土木工程系水力实验室的两个物理模型进行了调查。采用具有不同非均匀性参数值的沉积物作为河床物质。此外，不同的斜坡斜率，从1/4到1/12，进行了测试。方程和图表表明，在冲坑下游存在山脊的情况下，可以通过简单的关系来解释结果。
The scour process downstream of block ramps is an important research topic of value to engineering practice. The object of the present experimental study is to examine the scour mechanism in order to predict the main geometrical parameters of the scour hole downstream of block ramps. The investigations have been conducted using two physical models located in the hydraulic laboratory of the Department of Civil Engineering in Pisa, Italy. Sediments with different values of the nonuniformity parameter were used as channel bed material. Moreover, different ramp slopes, ranging from 1/4 to 1/12, were tested. Equations and graphs demonstrate that the results can be interpreted by means of simple relationships in the case in which a ridge is present downstream of the scour hole.