Analysis of lateral openings in tunnel linings. (August 2015)

• Record Type: Journal Article
• Authors: Spyridis, Panagiotis; Bergmeister, Konrad
• Is Part Of: Tunnelling and underground space technology. Volume 50(2015)
• Page Start: 376
• Page End: 395
• Publication Date: 2015-08
• Subjects: Soft ground tunneling -- Shallow tunnels -- Concrete lining -- Openings -- Breakouts -- Junctions -- 3D numerical modeling; Tunneling -- Periodicals; Underground construction -- Periodicals; Tunnels -- Periodicals; Underground areas -- Periodicals; 624.193
• DOI: 10.1016/j.tust.2015.08.005
• Languages: English
• ISSNs: 0886-7798

Abstract

Highlights: Effects of basic parameters in tunnel breakout analysis and design are presented. Various tunnel openings analysis methods are comparatively investigated. A library of calculated stress patterns around tunnel openings is made available. Abstract: The present study discusses the structural response of a parent tunnel when a near circular breakout is made for a perpendicular child tunnel. Beyond the presentation of some main background on the topic, the description of the investigated systems and the investigation methods is provided, this mainly being linear-elastic finite elements analysis, with inclusion of analytical solutions for comparison and with some analysis assuming non-linear soil behavior in order to investigate particular aspects in the discussed systems. This paper contributes to the little hitherto available literature with respect to the soil structure-interaction and the structural behavior at tunnel breakouts and junctions, while reference for future projects is offered through 36 analyzed cases.