Upper bound solutions for face stability of circular tunnels in non-homogeneous and anisotropic clays

2018 ◽  
Vol 98 ◽  
pp. 189-196 ◽  
Author(s):  
Maosong Huang ◽  
Zhen Tang ◽  
Weixiang Zhou ◽  
Juyun Yuan
Keyword(s):  
Upper Bound ◽  
Face Stability ◽  
Anisotropic Clays

scholarly journals Upper-bound solutions for face stability of circular tunnel in purely cohesive soil using continuous rotational velocity field

2018 ◽  
Vol 58 (6) ◽  
pp. 1511-1525
Author(s):  
Wantao Ding ◽  
Keqi Liu ◽  
Lewen Zhang ◽  
Peihe Shi ◽  
Mingjiang Li ◽  
...  
Keyword(s):  
Velocity Field ◽  
Upper Bound ◽  
Rotational Velocity ◽  
Cohesive Soil ◽  
Circular Tunnel ◽  
Face Stability

scholarly journals Upper Bound Solution for the Face Stability of Shield Tunnel below the Water Table

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Xilin Lu ◽  
Haoran Wang ◽  
Maosong Huang
Keyword(s):  
Upper Bound ◽  
Limit Analysis ◽  
Fe Simulation ◽  
Shield Tunnel ◽  
Support Pressure ◽  
Seepage Force ◽  
Tunnel Face ◽  
Face Stability ◽  
The Face ◽  
Upper Bound Limit Analysis

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 cohesionc, surcharge loadq, and soil gravityγmultiplied by their corresponding coefficientsNc,Nq, andNγ, 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.

Upper bound analysis of tunnel face stability in layered soils

2013 ◽  
Vol 9 (4) ◽  
pp. 661-671 ◽  
Author(s):  
Xiao-Wu Tang ◽  
Wei Liu ◽  
Bettina Albers ◽  
Stavros Savidis
Keyword(s):  
Upper Bound ◽  
Layered Soils ◽  
Tunnel Face ◽  
Face Stability ◽  
Upper Bound Analysis ◽  
Tunnel Face Stability ◽  
Bound Analysis

scholarly journals Upper bound of tunnel face stability using asymmetric yielding

2018 ◽  
Vol 3 (4) ◽  
pp. 288-296
Author(s):  
Itai Elkayam ◽  
Assaf Klar
Keyword(s):  
Upper Bound ◽  
Tunnel Face ◽  
Face Stability ◽  
Tunnel Face Stability

scholarly journals Upper-bound solutions for face stability of circular tunnels in undrained clays

Géotechnique ◽  
2019 ◽  
Vol 69 (7) ◽  
pp. 655-658 ◽  
Author(s):  
Fei Zhang ◽  
Yufeng Gao ◽  
Yongxin Wu ◽  
Ning Zhang ◽  
Boonchai Ukritchon ◽  
...  
Keyword(s):  
Upper Bound ◽  
Face Stability
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