بررسی آزمایشگاهی اثر طول سری آبشکن‌های T شکل بر کنترل فرسایش کناره در شرایط غیر مستغرق در کانال پیچان‌رودی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی عمران، واحد تهران جنوب، دانشگاه آزاد اسلامی، تهران، ایران

2 گروه مهندسی عمران، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران

3 پژوهشکده حفاظت خاک و آبخیزداری

4 گروه مهندسی عمران، واحد تهران مرکزی، دانشگاه آزاد اسلامی، تهران، ایران

چکیده

اﺳﺘﻔﺎده از آﺑﺸﻜﻦ ﻫﺎ یکی از روش های رایج برای کنترل فرسایش کناره و حفاظت سواحل رودخانه ها است. در واقع حضور آبشکن ها موجب اصلاح شرایط هیدرولیکی جریان و همچنین کاهش قدرت فرسایشی آب در فاصله دو آبشکن می شود که در نهایت زمینه رسوبگذاری و تثبیت سواحل رودخانه را به وجود می آورد. در این پژوهش با ساخت یک کانال آزمایشگاهی پیچان رودی و استفاده از پنج آبشکن، اقدام به بررسی تاثیر آبشکن های سری T شکل بر کنترل فرسایش کناره گردید. آزمایش ها با در نظر گرفتن سه طول موثر و سه عدد فرود مختلف در حالت نفوذناپذیر و به صورت غیر مستغرق انجام پذیرفت. نتایج این پژوهش بیانگر این است که با افزایش طول آبشکن ها، میزان عقب نشینی کناره کاهش یافته است. به طوریکه برای طول های 9، 12 و 15 سانتی متر به ترتیب حدود 31.7، 35.4 و 58.0 درصد میانگین عقب نشینی کناره نسبت به حالت بدون آبشکن کاهش یافته است. در این پژوهش از سه معیار, RMSE , R2 و MAE به منظور مقایسه داده های حاصل از رابطه بدست آمده و داده های آزمایشگاهی استفاده شد، که مقدار این شاخص ها به ترتیب برابر 0.924، 0.127 و 0.097 برآورد گردید.

کلیدواژه‌ها


عنوان مقاله [English]

Experimental investigation of the effect of series length of T-shaped spur dikes on the control of bank erosion in non-submerged conditions in the meandering channel

نویسندگان [English]

  • pedram esmaeli 1
  • Siamak Boudaghpour 2
  • Mohammad Rostami 3
  • Mehdi Mirzaee 4
1 Department of Civil Engineering, South Tehran Branch, Islamic Azad University, Tehran ,Iran
2 Department of Civil Engineering, K.N. Toosi University of Technology, Tehran, Iran
3 SCWMRI
4 Department of Civil Engineering, Central Tehran Branch , Islamic Azad University, Tehran ,Iran
چکیده [English]

The use of spur dikes is one of the most common methods for controlling bank erosion and protecting river shores. In fact, the presence of the spur dikes causes the modification of hydraulic flow conditions as well as the reduction of water erosion power at the distance of two spur dike, that eventually causes the sedimentation and stabilization of the river banks. In this study, we investigated the effect of T-shaped spur dikes on erosion control by constructing a laboratory channel of meandering and using five spur dike. The experiments were conducted by taking three effective lengths three different froude numbers in impermeable and non-submerged conditions. The results of this study indicate that with the increase of the length of the spur dikes, the retreat rate has decreased. For the length of 9, 12 and 15 cm respectively, about 31.7, 35.4 and 58.0 percent of the mean retreat of the bank compared to the state without the spur dike decreased. In this study, three criteria R2, RMSE and MAE were used to compare the data obtained from the formula and the laboratory data, the amount of these indices were estimated 0.924, 0.127 and 0.097, respectively.

کلیدواژه‌ها [English]

  • Bank erosion
  • Experimental Investigation
  • Length of spur dike
  • T-shape Spur dike
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