Journal ArticleDOI
Three-dimensional undrained tunnel face stability in clay with a linearly increasing shear strength with depth
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TLDR
In this article, an approximate closed-form solution was proposed for three-dimensional undrained tunnel face stability in clays with constant or linearly increasing shear strength profiles with depth.About:
This article is published in Computers and Geotechnics.The article was published on 2017-08-01. It has received 85 citations till now. The article focuses on the topics: Shear strength (soil) & Overburden pressure.read more
Citations
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Tunnel face stability in cohesion-frictional soils considering the soil arching effect by improved failure models
TL;DR: In this paper, an improved 3D rotational failure model based on the limit analysis method and an improved wedge-prism model were proposed to better assess the stability of tunnel faces in cohesion-frictional soils.
Journal ArticleDOI
Numerical modelling of tunnel face stability in homogeneous and layered soft ground
Ahmed S.N. Alagha,David Chapman +1 more
TL;DR: In this article, a series of 3-D finite element simulations were conducted using the M i d a s - G T S N X software in order to determine the required collapse pressure of a tunnel face during tunnelling in homogeneous or layered soils.
Journal ArticleDOI
Face stability analysis of a shallow horseshoe-shaped shield tunnel in clay with a linearly increasing shear strength with depth
TL;DR: Based on the kinematic approach of limit analysis, a continuous velocity field for a horseshoe-shaped shield tunnel is proposed to evaluate the limit support pressure of both the collapse and blowout of the tunnel face.
Journal ArticleDOI
An analytical mechanism of limit support pressure on cutting face for deep tunnels in the sand
TL;DR: In this article, a new failure mechanism that combined with the Protodyakonov's theory and the multi-block failure mechanisms is proposed to deal with the face stability of deep tunnels in sandy layer.
Journal ArticleDOI
Face stability analysis of a shallow tunnel in the saturated and multilayered soils in short-term condition
TL;DR: In this article, a new 3D collapse mechanism was proposed to investigate the face stability of a shallow tunnel embedded in the saturated and multi-layered soils with short-term condition.
References
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Journal ArticleDOI
Upper and lower bound solutions for the face stability of shallow circular tunnels in frictional material
E. Leca,L. Dormieux +1 more
TL;DR: In most cases the ground itself is not suitable for underground urban development as well as for transportation, tunnels need to be driven in increasingly difficult soil conditions as mentioned in this paper, and in most cases, ground conditions are not suitable.
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Geotechnical stability analysis
TL;DR: In this paper, the authors describe recent advances in stability analysis that combine the limit theorems of classical plasticity with finite elements to give rigorous upper and lower bounds on the failure load.
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The stability of shallow tunnels and underground openings in cohesive material
TL;DR: In this article, the authors consider three different shapes of shallow underground opening relevant to tunnelling and derive upper and lower bound stability solutions for collapse under undrained conditions, and the risk of blowout failure caused by excessively high fluid pressures.
Journal ArticleDOI
Rotational failure mechanisms for the face stability analysis of tunnels driven by a pressurized shield
TL;DR: In this paper, two rotational failure mechanisms are proposed for both the active and passive cases, and an extension of the proposed collapse mechanism to include a tension cut-off in the classical Mohr-Coulomb failure criterion is presented and discussed.
Journal ArticleDOI
Face Stability Analysis of Circular Tunnels Driven by a Pressurized Shield
TL;DR: In this article, the authors proposed a multiblock failure mechanism for a circular tunnel driven by a pressurized shield, which is based on a translational three-dimensional multi-block failure mechanism.
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Upper and lower bound solutions for the face stability of shallow circular tunnels in frictional material
E. Leca,L. Dormieux +1 more