Adib, Arash, Shafai Bejestan, Mahmood, Shiri, Valiallah. (1397). On the Local Scour Around Group Piers in Series by Experimental Tests. هنرهای کاربردی, 7(1), 21-34. doi: 10.22075/jrce.2018.11944.1204
Arash Adib; Mahmood Shafai Bejestan; Valiallah Shiri. "On the Local Scour Around Group Piers in Series by Experimental Tests". هنرهای کاربردی, 7, 1, 1397, 21-34. doi: 10.22075/jrce.2018.11944.1204
Adib, Arash, Shafai Bejestan, Mahmood, Shiri, Valiallah. (1397). 'On the Local Scour Around Group Piers in Series by Experimental Tests', هنرهای کاربردی, 7(1), pp. 21-34. doi: 10.22075/jrce.2018.11944.1204
Adib, Arash, Shafai Bejestan, Mahmood, Shiri, Valiallah. On the Local Scour Around Group Piers in Series by Experimental Tests. هنرهای کاربردی, 1397; 7(1): 21-34. doi: 10.22075/jrce.2018.11944.1204

On the Local Scour Around Group Piers in Series by Experimental Tests

Journal of Rehabilitation in Civil Engineering
مقاله 4، دوره 7، شماره 1 - شماره پیاپی 13، بهار 2019، صفحه 21-34    اصل مقاله (1.31 M)
نوع مقاله: Regular Paper
شناسه دیجیتال (DOI): 10.22075/jrce.2018.11944.1204
نویسندگان
Arash Adib* 1؛ Mahmood Shafai Bejestan2؛ Valiallah Shiri3
1Civil Engineering Department, Engineering Faculty, Shahid Chamran University, Ahvaz, Iran
2Hydraulic Structure Department, Water Science and Engineering Faculty, Shahid Chamran University, Ahvaz, Iran
3Civil Engineering Department, Engineering faculty, Shahid Chamran University, Ahvaz, Iran
چکیده
In this article a physical model is presented. A trapezoidal shape of channel with 1.45 m width, 1 meter depth and banks slope of 1H: 1.5V was applied. Circular piers (6, 8 and 10cm diameter) were examined under three dissimilar flow discharges of 50, 65 and 80 lit/s and three different median bed material sizes equal to 0.94, 1.31 and 2.12 mm. Seven different longitude distance to pier diameter ratios (1, 1.5, 2, 2.5, 3, 4 and 5) were examined. Measurement of scour depth (upstream, around and downstream of pier) was accomplished in 10, 15, 20, 30, 60, 120, 240 and 360 minutes from the beginning of each examination. The results indicated that 30%-40%, up to 65% and more than 90% of local scour occurs at first two, 10, 120 and 200 minutes from the beginning of test respectively. The effect of dissimilar parameter especially the distance between piers on scour depth at group piers in series was evaluated and the results were compared to other researchers. It was found that our results is best fitted with the general form of well known Sheppard et al. (2004)’s equation.
کلیدواژه‌ها
Local Scour؛ Group Piers؛ Physical Model؛ Sheppard et al. (2004)'s Equation؛ Sediment
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