هیدروفیزیک

هیدروفیزیک

کنترل آبشستگی مقابل اسکله با کمک دماغه منحرف کننده منحنی شکل

نوع مقاله : مقاله پژوهشی

نویسندگان
مرتضی بختیاری 1
محسن سلیمانی بابرصاد 2
عباس صفائی 3
1 دانشیار، دانشکده مهندسی دریا، دانشگاه علوم و فنون دریایی خرمشهر، خرمشهر، ایران
2 گروه مهندسی آب، مرکز تحقیقات علوم آب و محیط زیست، واحد شوشتر، دانشگاه آزاد اسلامی، شوشتر، ایران
3 مرکز تحقیقات علوم آب و محیط زیست، واحد شوشتر، دانشگاه آزاد اسلامی، شوشتر، ایران
چکیده
اصلی‌ترین عامل تخریب اسکله‌ها، آبشستگی موضعی اطراف آن‌ها می‌باشد. برای کنترل این پدیده، مطالعات بسیاری انجام شده و راهکارهایی جهت حفاظت از اسکله‌ها ارائه شده است. راهکارهای حفاظت از اسکله‌ها به دو روش مستقیم و غیرمستقیم تقسیم می‌شوند، یکی از روش‎هایی که به‌صورت غیرمستقیم با کمک اصلاح خطوط جریان اطراف اسکله می‌تواند عمق آبشستگی را کاهش دهد، تغییر زاویه دماغه اسکله است. در این تحقیق به‌صورت آزمایشگاهی تأثیر تغییر شکل دماغه اسکله با راستای جریان بررسی شد. ازاین‌رو اسکله با دماغه قوسی شکل و شعاع قوس‎های 28/52، 20/20، 09/12 و 06/11 سانتی‌متر در شرایط آب زلال بررسی شد. نتایج حاصل از تحقیق نشان می‌دهد در بهترین حالت، اسکله با کمترین شعاع به میزان 06/11 توانست، در سرعت‌های نسبی تا 95 درصد سرعت آستانه حرکت ذرات، بهترین عملکرد را داشته باشد.
کلیدواژه‌ها
آبشستگی
اسکله
شعاع قوس دماغه
آستانه حرکت

موضوعات

عنوان مقاله English

Control of Scour in Front of Piers Using a Curved Deflecting Nose

نویسندگان English

Morteza Bakhtiari 1
Mohsen Solimani Babarsad 2
Abbas Safaei 3
1 Faculty of Marine Engineering, Khorramshahr University of marine science and technology khorramshahr,Iran
2 Department of Water Sciences, Water Science and Environmental Research Center, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran.
3 Water Science and Environmental Research Center, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran
چکیده English

Local scour around pier foundations is the primary cause of pier damage. Numerous studies have addressed this phenomenon, proposing various protection methods that can be broadly classified into direct and indirect approaches. One effective indirect method to reduce scour depth is by modifying the flow patterns around the pier through altering the nose shape of the pier. This experimental study investigates the effect of changing the pier nose shape aligned with the flow direction. Curved-nose piers with arc radii of 52.28 cm, 20.20 cm, 12.09 cm, and 11.06 cm were tested under clear-water conditions. Results show that the pier with the smallest radius (11.06 cm) exhibited the best performance, achieving optimal scour reduction at relative flow velocities up to 95% of the particle incipient motion threshold velocity.

کلیدواژه‌ها English

Scour
Pier
Curved Nose Radius
Incipient Motion
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  • تاریخ دریافت 03 دی 1403
  • تاریخ بازنگری 22 بهمن 1403
  • تاریخ پذیرش 19 اسفند 1403