نتایج جستجو برای: natm

تعداد نتایج: 110  

Journal: :Doboku Gakkai Ronbunshu 1986

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ژورنال: مهندسی تونل و فضاهای زیر زمینی 2017
محسن موسیوند, محمد رضا منصوری, محمد ملکی, مسعود نکویی,

در این تحقیق به مطالعه اثر نوع مراحل حفاری روی پارامتر کاهش تنش پرداخته شده است. به این منظور در ابتدا، با استفاده از مقطعی از تونل خط 2 متروی کرج و تحلیل بازگشتی، کالیبراسیون پارامترهای مدل انجام گرفت. سپس با در نظرگیری مراحل حفاری متداول در صنعت تونل سازی و مترو با استفاده از یک سری شبیه‌سازی‌های عددی توسط نرم‌افزارهای تفاضل محدود FLAC 2D و FLAC 3D به مطالعه ضریب آزادی تنش در هر گام از مراحل ...

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2012
A. C. Adoko Li Wu

Estimation of tunnel diameter convergence is a very important issue for tunneling construction, especially when the new Austrian tunneling method (NATM) is adopted. For this purpose, a systematic convergence measurement is usually implemented to adjust the design during the whole construction, and consequently deadly hazards can be prevented. In this study, a new fuzzy model capable of predicti...

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Journal: :IOP conference series 2022

Abstract One important measure to combat progressing climate change is compliance with and under no circumstances exceed the decreasing greenhouse gas budget. Every economic sector must strive make its ecological contribution achieve this objective. The construction largely responsible for these negative environmental burdens. Although tunnels are considered have extensive energy material consu...

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Journal: :Journal of The Korean Society of Civil Engineers 2012

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Journal: :Brazilian Journal of Development 2020

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Journal: :Doboku Gakkai Ronbunshu 2004

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Journal: :E3S Web of Conferences 2019

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Journal: : 2021

With the globalization of world, it has become necessary to create new routes for transportation due decrease in usage areas construction and accelerated living conditions. For these reasons, some road railway selected are passed through tunnels. In addition, with increase population metropolitan cities, necessitated by rail systems so tunnel constructions became a necessity here. However, tunn...

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Journal: :Doboku Gakkai Ronbunshu 1997

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