Ground movement and tunnel stability when tunneling in sandy ground

Tunneling may cause ground movements and damage to adjacent buildings and overlying facilities. In this study, the failure mechanism and ground movement behavior around tunnels embedded in sandy soil below the water table were investigated in a series of model tunnel tests in a centrifuge. The magni...

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Bibliographic Details
Published inJournal of the Chinese Institute of Engineers Vol. 27; no. 7; pp. 1021 - 1032
Main Authors Lee, Chung-Jung, Chiang, Kuo-Hui, Kuo, Chia-Ming
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.11.2004
Subjects
failure mechanism
surface settlement trough
tunnel
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Summary:Tunneling may cause ground movements and damage to adjacent buildings and overlying facilities. In this study, the failure mechanism and ground movement behavior around tunnels embedded in sandy soil below the water table were investigated in a series of model tunnel tests in a centrifuge. The magnitudes and extents of the surface settlement troughs for the cases of various ground loss for tunnels buried at various depths are provided. A new failure mechanism is proposed and validated by comparison with the test results. The proposed mechanism enables accurate prediction of two of the key quantities in the design of linings for tunnels embedded in sandy soils, namely the minimum supporting pressure needed to retain tunnel stability and the vertical soil pressure acting on the tunnel crown.
ISSN:0253-3839
2158-7299
DOI:10.1080/02533839.2004.9670957