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دانشگاه بوعلی سینا
چکیده:   (60 مشاهده)
استفاده از اسپادکن به‌عنوان پی سکوی حفاری جکاپ مرسوم است. ابعاد مدل، تحکیم رس و نفوذ اسپادکن، مهم‌ترین مسائل در مدل‌سازی این نوع پی‌ها در رس هستند. در این مقاله نفوذ مخروط‌های CPT و پی اسپادکن در خاک رسی تک‌لایه مورد بررسی قرار گرفته است. برای مطالعه تاثیر مقاومت زهکشی نشده رس بر عملکرد بار- نفوذ اسپادکن از خاک اصلاح شده با 5 و 10 درصد سیمان استفاده شد؛ همچنین از دو مخروط CPT با قطرهای متفاوت جهت تخمین مقاومت برشی زهکشی نشده لایه رس استفاده شد. نتایج نشان داد که می‌توان از رس اصلاح شده با سیمان برای مدل‌سازی خاک با مقاومت‌های  متفاوت استفاده کرد، با این‌حال بایستی به تغییرات ضرایب ظرفیت باربری در دو حالت با و بدون سیمان دقت کرد. همچنین نتایج نفوذ مخروط‌های CPT نشان داد که در مدل‌سازی فیزیکی، می‌توان با دقت مناسب از مخروط‌های با قطر کوچکتر به‌جای مخروط‌های با قطر متداول بهره گرفت.
متن کامل [PDF 677 kb]   (34 دریافت)    
نوع مطالعه: مقاله پژوهشي | موضوع مقاله: Offshore Structure
دریافت: ۱۳۹۷/۲/۲۲ | پذیرش: ۱۳۹۷/۸/۲۹

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