Study on Mechanical Properties of Support Structure of Deep Buried Tunnel Soft and Weak Surrounding Rock in High Situ Stress Area
Mechanical properties of bolt, shotcrete, steel support structure of initial support, and lining concrete were analyzed through elasto-plastic 3-D finite element numerical simulation of bench tunneling in high geo-stress area. Results of analysis indicate that: 1) strongly effected by steel support structure, displacement, maximum principal stress of shotcrete are larger at crown; displacement, maximum principal stress, and shearing stress are larger at spandrel; 2) stress concentration strongly influenced on bolt axial stress at a range of 1.0 m surrounding rock; 3) axial stress and vertical shearing force of steel support structure increase gradually with distance augmentation to the tunnel face; and 4) different principal stresses and shearing stresses exist at various layers and positions of lining. The conclusion provides a reference for deep-buried tunnel design of support structure and stability evaluation in high geo-stress area.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/10020268
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Authors:
- Jin, Xiaoguang
- He, Xi
- Li, Xiaohong
- Publication Date: 2009-6
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 77-81, 87
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Serial:
- Journal of Highway and Transportation Research and Development
- Volume: 4
- Issue Number: 1
- Publisher: Research Institute of Highway, Ministry of Transport
- ISSN: 1002-0268
Subject/Index Terms
- TRT Terms: Excavation and tunneling; Mechanical properties; Tunnels; Underground structures
- Subject Areas: Bridges and other structures; Highways; I25: Design of Tunnels;
Filing Info
- Accession Number: 01149103
- Record Type: Publication
- Files: TRIS
- Created Date: Jan 27 2010 8:18AM