تاثیر انفجار بر سازه های زیرزمینی حفاری شده در محیط های آبدار

نوع مقاله : مقاله پژوهشی

نویسندگان

1 تهران/ دانشگاه امام حسین (ع)

2 دانشگاه تربیت مدرسمحل کار: مهندسین مشاور توسعه را آهن ایران (مترا)

چکیده

امروزه فضاهای زیرزمینی به­واسطه افزایش جمعیت، توسعه فناوری، افزایش تهدیدات نظامی و صرفه­جویی­های اقتصادی روز به روز در حال افزایش می­باشد. میزان تاثیرپذیری فضاهای زیرزمینی در برابر بارهای انفجاری ناشی از تهاجم دشمن، به­طور مستقیم به موفقیت و کارآیی پدافند غیرعامل بستگی دارد. از طرف دیگر، پایداری فضاهای امن زیرزمینی در محیط­های مختلف زمین­شناسی بسیار حائز اهمیت می باشد. با توجه به افزایش نیاز برای اجرای این سازه­ها،  ممکن است بسیاری از این پروژه­ها در شرایط نامطلوب زمین­شناسی اجراء شوند. بنابراین، لازم است پایداری این فضاها برای محیط­های با واحدهای زمین­شناسی متفاوت مورد تجزیه و تحلیل قرار گیرند. در این مقاله با استفاده از روش عددی المان مجزای یک کد عددی توسط نرم­افزار UDEC توسعه داده شده است. در کد عددی توسعه داده شده، تاثیر سطح آب بر روی لاینینگ تونل بررسی شده است. برای بررسی تاثیر سطح آب بر روی پایداری تونل، فشار 10 تن ماده منفجره به صورت نمایی به بالای تونل اعمال شده است. بررسی­های انجام­شده نشان می­دهد که با افزایش سطح آب، صدمات ناشی از انفجار به پوشش تونل بیشتر می­شود. 

کلیدواژه‌ها


عنوان مقاله [English]

The Influence of Explosion on the Underground Structures in Watery Media

چکیده [English]

Nowadays, underground structures are increasing day by day due to the population increase, technology development, increasing of military threat and economic saving. The impact rate of underground spaces against explosive loads caused by enemy invasion depends directly on the success and effectiveness of passive defense. On the other hand, stability of the underground spaces is very crucial in various lithological conditions. Due to the increased need for the implementation of these structures, many of these projects may be carried out in unfavorable geological conditions. Therefore, it is necessary to analyze the stability of these spaces for different lithology conditions. In the present study, by means of numerical methods of discrete element, a code has been developed by UDEC software. In the numerical developed code, the influence of water level on the tunnel final support has been investigated. To investigate the effect of water level on the tunnel stability, the pressure of 10 tons of explosives has been exponentially applied to the top of the tunnel. Research indicates that as the water level rises, the damage caused by the explosion increases to the tunnel support.

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