Effects of face excavation patterns on time dependent behavior of tunnel
Publish place: 7th National Congress on Civil Engineering
Publish Year: 1392
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
NCCE07_0971
تاریخ نمایه سازی: 16 مهر 1392
Abstract:
A number of numerical analyses were performed to investigate the effect of different patterns of tunnel face excavation, in NATM, on the time-dependent behavior of ground due to tunneling. For achieving this aim an elastoplastic-viscoplastic constitutive model implemented in FLAC code was used. Towheed tunnel which was constructed in accordance with the principles of the New Austrian Tunneling Method (NATM) as a case study is analyzed by three different face advance techniques. Three type of excavation patterns studied in the present work are; twin sidewall excavation (Method-a), crown, invert face excavation (Method-b), and crown, bench, and invert face excavation (Method-c). The obtained Results shows that Method-a presents a less ground settlement, and can be considered as more proper method for tunnel excavation.
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Authors
Mohammad Maleki
Associate Professor, Department of Civil Engineering, Bu-Ali Sina University, Hamedan, Iran
Mohsen Mousivand
PhD student, Department of Civil Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran
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