Tunnelling close beneath an existing tunnel in clay – perpendicular undercrossing
| Autor: | C. Y. Gue, M. J. Wilcock, M. M. Alhaddad, M. Z. E. B. Elshafie, K. Soga, R. J. Mair |
|---|---|
| Přispěvatelé: | Elshafie, Mohammed [0000-0001-9908-5515], Apollo - University of Cambridge Repository |
| Rok vydání: | 2017 |
| Předmět: |
0211 other engineering and technologies
field instrumentation Earth and Planetary Sciences (miscellaneous) 020101 civil engineering 02 engineering and technology Geotechnical Engineering and Engineering Geology tunnels & tunnelling 021101 geological & geomatics engineering 0201 civil engineering centrifuge modelling |
| Zdroj: | Géotechnique. 67:795-807 |
| ISSN: | 1751-7656 0016-8505 |
| DOI: | 10.1680/jgeot.sip17.p.117 |
| Popis: | A series of centrifuge model tests in clay was carried out to investigate the response of an existing tunnel at different clear distances to new tunnelling. A three-dimensional (3D) staged tunnelling model was adopted to simulate a wide range of tail void volume losses for the new tunnel construction while monitoring detailed 3D soil surface settlements and tunnelling-induced strains in the existing tunnel lining. This paper also presents a detailed case study of a similar scenario in the London Underground redevelopment of Bond Street station; various state-of-the-art instrumentation methods, including fibre optic Brillouin optical time domain reflectometry, instrumented tunnel bolts and photogrammetry, were deployed to monitor the response of the existing Royal Mail tunnel due to the new tunnelling works close beneath. The combination of field and centrifuge modelling data provides important new insights into the deformation mechanisms encountered in such complex tunnelling scenarios. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|