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بررسی اثر جداگانه و ترکیبی طوق و شمع فداشونده در آبشستگی موضعی گروه پایه پل | ||
| تحقیقات آب و خاک ایران | ||
| مقاله 17، دوره 48، شماره 4، آذر 1396، صفحه 879-890 اصل مقاله (915.99 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/ijswr.2017.213498.667521 | ||
| نویسندگان | ||
| سید محمد علی زمردیان* 1؛ حمیده غفاری2؛ زهرا قاسمی2 | ||
| 1دانشیار، دانشگاه شیراز، تخصص: ژنوتکنیک/ مکانیک خاک/ سازه های آبی | ||
| 2دانشگاه شیراز | ||
| چکیده | ||
| شناخت پدیده مخرب آبشستگی در اطراف پایههای پل و ارائه راهکارهای مقابله با آن ضروری می‌باشد. در این پژوهش به‌منظور کنترل آبشستگی در اطراف گروهپایه از شمع‌های فداشونده، طوق مربعی و کاربرد توأم آنها استفاده شده است. گروهپایه دو و سهتایی در امتداد یک خط و با فاصله 2.5D در جهت طولی و عرضی جریان و در شرایط آب زلال مورد بررسی قرار گرفت. نتایج نشان میدهد که در گروهپایه در جهت جریان، استفاده از شمع‌های فداشونده منجر به کنترل کامل آبشستگی در پایه پشتی میشود. طوق تأثیر بیشتری در کاهش آبشستگی پایه جلویی به میزان %22/72 و %23/69 بهترتیب در گروهپایه دوتایی و سهتایی نشان داد و کاربرد توأم آنها منجر به کاهش بیشتر آبشستگی در تکتک پایه‌ها شده است. در گروهپایه دو و سهتایی عمود بر جریان روش ترکیبی بهترتیب با کاهش %14/57 و %5/67 آبشستگی، بیشترین تأثیر را نسبت به کاربرد جداگانه آنها نشان داد. | ||
| کلیدواژه‌ها | ||
| آبشستگی موضعی؛ گروه پایه؛ طوق؛ شمع فداشونده | ||
| عنوان مقاله [English] | ||
| Separated and combined effects of collar and sacrificial pile on scour reduction of bridge piers group | ||
| نویسندگان [English] | ||
| Seyed Mohamad Ali Zomorodian1؛ Hamideh Ghaffari2؛ Zahra Ghasemi2 | ||
| 1University of Shiraz | ||
| 2University of Shiraz | ||
| چکیده [English] | ||
| Recognition and proposing some controlling methods to reduce destructive scour phenomenon is essential. In this study, the sacrificial piles, square collar and combination of sacrificial piles and square collar was used to control the scouring depth around the piers group. Two and three piers group along a line with a distance of 2.5D between the piers in longitudinal and transversal direction flow were investigated under clear water condition. The results showed that the effect of sacrificial piles in reducing the scour depth of the rear pier of pier groups in the flow direction is greater than single pier. The square collar was more effective in decreasing scour depth of front pier that equal to 72.22% and 69.23% in two and three piers group, respectively. The combination of sacrificial piles and square collar could further reduce the scouring depth. Also, in the two and three piers group in transverse direction of flow, the combination of sacrificial piles and square collar have shown more effective than square collar and sacrificial piles in decreasing the scour depth. The reduction of scour depth equal to 57.14% and 67.5%, for two and three piers groups respectively. | ||
| کلیدواژه‌ها [English] | ||
| local scouring, pier groups, Collar, sacrificial pile | ||
| مراجع | ||
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