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Face stability analysis of shallow circular tunnels driven by a pressurized shield in purely cohesive soils under undrained conditions.
- Source :
-
Computers & Geotechnics . Mar2019, Vol. 107, p110-127. 18p. - Publication Year :
- 2019
-
Abstract
- Abstract Based on the slip line and limit analysis theories, this paper presents a new 3D collapse mechanism to analyze the face stability of a circular shield-driven tunnel in purely cohesive soil. The new collapse mechanism is a 4-variable multizone mechanism that depends on cover-to-diameter ratios (C/D). The proposed mechanism suggests that failure zones at the tunnel face are primarily formed by shear failure. A comparison of this approach with numerical methods and other kinematic approaches shows that the proposed failure mechanism significantly improves the existing upper-bound solutions for the face stability of circular tunnels in purely cohesive soils. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0266352X
- Volume :
- 107
- Database :
- Academic Search Index
- Journal :
- Computers & Geotechnics
- Publication Type :
- Academic Journal
- Accession number :
- 134069794
- Full Text :
- https://doi.org/10.1016/j.compgeo.2018.11.025