Upper Bound Solution for the Face Stability of Shield Tunnel below the Water Table
Joint Authors
Lu, Xilin
Wang, Haoran
Huang, Maosong
Source
Mathematical Problems in Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-10-09
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
By FE simulation with Mohr-Coulomb perfect elastoplasticity model, the relationship between the support pressure and displacement of the shield tunnel face was obtained.
According to the plastic strain distribution at collapse state, an appropriate failure mechanism was proposed for upper bound limit analysis, and the formula to calculate the limit support pressure was deduced.
The limit support pressure was rearranged to be the summation of soil cohesion c, surcharge load q, and soil gravity γ multiplied by their corresponding coefficients Nc, Nq, and Nγ, and parametric studies were carried out on these coefficients.
In order to consider the influence of seepage on the face stability, the pore water pressure distribution and the seepage force on the tunnel face were obtained by FE simulation.
After adding the power of seepage force into the equation of the upper bound limit analysis, the total limit support pressure for stabilizing the tunnel face under seepage condition was obtained.
The total limit support pressure was shown to increase almost linearly with the water table.
American Psychological Association (APA)
Lu, Xilin& Wang, Haoran& Huang, Maosong. 2014. Upper Bound Solution for the Face Stability of Shield Tunnel below the Water Table. Mathematical Problems in Engineering،Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-1046429
Modern Language Association (MLA)
Lu, Xilin…[et al.]. Upper Bound Solution for the Face Stability of Shield Tunnel below the Water Table. Mathematical Problems in Engineering No. 2014 (2014), pp.1-11.
https://search.emarefa.net/detail/BIM-1046429
American Medical Association (AMA)
Lu, Xilin& Wang, Haoran& Huang, Maosong. Upper Bound Solution for the Face Stability of Shield Tunnel below the Water Table. Mathematical Problems in Engineering. 2014. Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-1046429
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1046429