Version 1
: Received: 23 November 2018 / Approved: 26 November 2018 / Online: 26 November 2018 (10:24:21 CET)
How to cite:
Liu, J.; Ding, W.; Wang, M. Analysis of Face Stability of Circular Tunnel in Purely Cohesive Soils Driven by Shield. Preprints2018, 2018110582. https://doi.org/10.20944/preprints201811.0582.v1
Liu, J.; Ding, W.; Wang, M. Analysis of Face Stability of Circular Tunnel in Purely Cohesive Soils Driven by Shield. Preprints 2018, 2018110582. https://doi.org/10.20944/preprints201811.0582.v1
Liu, J.; Ding, W.; Wang, M. Analysis of Face Stability of Circular Tunnel in Purely Cohesive Soils Driven by Shield. Preprints2018, 2018110582. https://doi.org/10.20944/preprints201811.0582.v1
APA Style
Liu, J., Ding, W., & Wang, M. (2018). Analysis of Face Stability of Circular Tunnel in Purely Cohesive Soils Driven by Shield. Preprints. https://doi.org/10.20944/preprints201811.0582.v1
Chicago/Turabian Style
Liu, J., Wantao Ding and Mingbin Wang. 2018 "Analysis of Face Stability of Circular Tunnel in Purely Cohesive Soils Driven by Shield" Preprints. https://doi.org/10.20944/preprints201811.0582.v1
Abstract
Based on the kinematic approach of the limit analysis and slip-line theories, this paper proposes a new 2D analytical model to evaluate the collapse support pressure to ensure the face stability of a circular tunnel in purely cohesive soils driven by a shield. The normality conditions, the yield criterion and the vertical soil arching effect are considered in the analytical model. Two upper bound solutions corresponding to the ratio of the cover to the diameter (C/D) are derived from considering the mechanisms based on the motion of rigid multi-blocks. Comparisons are made with existing upper and lower bound solutions published in previous articles. The results are close to the solutions of practical engineering. The failure mechanisms proposed in this study provide a better explanation for the failure process in the heading of the tunnel face.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
