Structural analysis for shallow tunnels in soft soils

Title

Structural analysis for shallow tunnels in soft soils

 Author

Vu, M.N. (TU Delft Geo-engineering) ORCID 0000-0003-0140-9775
Broere, W. (TU Delft Geo-engineering) ORCID 0000-0002-0463-513X
Bosch, J.W. (TU Delft Geo-engineering)

Date

2017-08-01

 Abstract

Generally, studies on structural design for bored tunnels focus on moderate to deep tunnels (cover-to-diameter ratio C/D ≥ 2). Such tunnel design methods cannot be used for shallow-situated bored tunnels because the influence of buoyancy is discounted, and actual loads on the tunnel lining are not taken into account properly. This paper proposes a new model that has more accurate loads on the tunnel lining combined with finite-element analysis for shallow tunnels. Internal forces and deformations of various shallow bored tunnels are investigated. The relationship between the optimal thickness-to-diameter ratio d/D of the tunnel cross section and the cover-to-diameter ratio C/D is also studied.


 Subject

Cover-to-diameter ratio
Shallow bored tunnel
Soft soil
Tunnel lining

 To reference this document use:

http://resolver.tudelft.nl/uuid:aaca922c-af80-4cec-aaa5-0b98672b9dc1

 DOI

https://doi.org/10.1061/(ASCE)GM.1943-5622.0000866

 ISSN

1532-3641

 Source

International Journal of Geomechanics, 17 (8)

 Part of collection

Institutional Repository

 Document type

journal article

 Rights

© 2017 M.N. Vu, W. Broere, J.W. Bosch
Files
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