زمین شناسی مهندسی

زمین شناسی مهندسی

ارزیابی پتانسیل روانگرایی براساس تحلیل حساسیت، قابلیت اطمینان و اعتبار سنجی داده ها

نویسندگان
دانشگاه آزاد اسلامی
چکیده
در مطالعه حاضر سعی شده است پتانسیل روانگرایی در لایه های خاکی در محدوده شهر تبریز بر اساس آنالیز حساسیت، قابلیت اطمینان ارزیابی گردد. بدین منظور از میان 260 حلقه گمانه جمع آوری شده، تعداد 64 حلقه گمانه که دارای خطر وقوع روانگرایی بوده اند انتخاب شدند. سپس نقشه پهنه بندی خطر لرزه ای در محدوده مورد مطالعه با توجه به گسل شمال تبریز با استفاده از روش گسل محدود و با در نظر گرفتن اثرگذاری لایه های خاکی بر حداکثر شتاب سطحی(PGA) تهیه شده است. در ادامه، نقشه پهنه بندی خطر وقوع روانگرایی در محدوده مورد مطالعه با کاربرد شاخص خطر آماده گردید. در انتها، با کاربرد روش­های تحلیل حساسیت و قابلیت اطمینان مونت کارلو، میزان تغییرات ضریب اطمینان در برابر خطر وقوع روانگرایی لایه های خاکی مشخص شده و رابطه ای جهت تعیین این تغییرات ارائه شده است.
کلیدواژه‌ها

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