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首页> 外文期刊>Engineering journal >Evaluation and Prediction of the Scour Depth of Bridge Foundations with HEC-RAS Numerical Model and Empirical Equations (Case Study: Bridge of Simineh Rood Miandoab, Iran)
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Evaluation and Prediction of the Scour Depth of Bridge Foundations with HEC-RAS Numerical Model and Empirical Equations (Case Study: Bridge of Simineh Rood Miandoab, Iran)

机译：用HEC-RAS数值模型和经验公式对桥梁基础的冲刷深度进行评估和预测（案例研究：伊朗Simineh Rood Miandoab桥梁）

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摘要

Today, scouring is one of the major issues in the river and coastal engineering. Each year, many bridges around the world are destroyed due to neglecting hydraulic elements. In the present study, scour depth around the piers of the Simineh Rood Bridge in Miandouab, Iran were investigated using empirical relationships and the HEC-RAS numerical model, and the results are compared with each other. Firstly, a hydraulic software model was created from the river where the bridge was located using field data. Then, by entering the scouring data of bridge piers for discharges with a return period of 5 to 1000 years, changes in flow discharge were investigated for scouring around the middle and lateral sides of the bridge. Results of the empirical equations showed that some of the equations are not sensitive to increases in flow discharge, and for each return period, the results are near each other. Also, numerical model results showed that with an increase in discharge, scouring increases in the bridge’s middle and lateral piers. In all discharges, the first and the seventh pier had the lowest and highest scour depth, respectively. Also, the left and right abutments are heavily influenced by increasing discharge. In discharges with a return period of 1000 years, the scour depth was 11.19 and 6.32 m. The Frohlich method is not as sensitive as the CSU method to an increase in discharge when calculating scour depth. Finally, the results of the numerical model were compared with experimental empirical equations.
机译：如今，冲刷已成为河流和沿海工程中的主要问题之一。每年，由于忽视液压元件，全世界许多桥梁被摧毁。在本研究中，使用经验关系和HEC-RAS数值模型研究了伊朗Miandouab的Simineh Rood桥墩周围的冲刷深度，并将结果进行了比较。首先，使用现场数据从桥梁所在的河流创建了液压软件模型。然后，通过输入返回期为5到1000年的桥墩冲刷数据，研究了流量冲刷变化的变化，以冲刷桥梁中间和侧面。经验方程式的结果表明，一些方程式对流量的增加不敏感，并且对于每个返回周期，结果彼此接近。此外，数值模型结果还显示，随着流量的增加，桥梁的中间和横向桥墩的冲刷也会增加。在所有排放物中，第一和第七墩的冲刷深度分别为最低和最高。同样，左，右基台受流量增加的严重影响。在恢复期为1000年的排放物中，冲刷深度为11.19和6.32 m。在计算冲刷深度时，Frohlich方法不如CSU方法对排放量增加敏感。最后，将数值模型的结果与实验经验方程进行比较。

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