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Stability Analysis and Protection Measures of Large Section Tunnel in Coal Rich Weak Rock Stratum

التفاصيل البيبلوغرافية
العنوان: Stability Analysis and Protection Measures of Large Section Tunnel in Coal Rich Weak Rock Stratum
المؤلفون: Guannan Zhou, Zijiang Zhao, Zhanping Song, Hongjian Wang
المصدر: Geofluids, Vol 2021 (2021)
بيانات النشر: Wiley, 2021.
سنة النشر: 2021
المجموعة: LCC:Geology
مصطلحات موضوعية: Geology, QE1-996.5
الوصف: Due to poor engineering geological conditions of Liujiazhuang tunnel on Shanghai-Kunming Passenger Dedicated Line, the large deformation of weak rock occurs repeatedly during tunnel construction. In this paper, the large-scale finite element software ABAQUS is used to simulate the construction process of a large-section tunnel in weak surrounding rock. It is found that when tunnel face passes through the coal seam, the displacement and stress simulated by the bench method increase abruptly. The maximum stress reaches up to 18 MPa, and displacement reaches 45 mm, which is about twice when without crossing coal seam. It is technically feasible to use the bench method for tunnel construction, under the condition when large settlements is allowed; additionally, the bench method has better technical and economic benefits than that of the CD method. Through the comparative analysis of onsite monitoring data and numerical simulation results, it can be seen that the tunnel is in a dangerous state when passing through the coal seam and measures such as strengthening support or auxiliary advance support should be taken immediately to control the surrounding rock and to ensure tunnel construction safety.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1468-8115
1468-8123
Relation: https://doaj.org/toc/1468-8115; https://doaj.org/toc/1468-8123
DOI: 10.1155/2021/9394145
URL الوصول: https://doaj.org/article/eaa9f19bfa334c1b9c8f77087ae91ef1
رقم الأكسشن: edsdoj.9f19bfa334c1b9c8f77087ae91ef1
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:14688115
14688123
DOI:10.1155/2021/9394145