Owing to complex and lengthy geological processes, inclined layered soils are frequently
encountered in geological and geotechnical engineering. Tunneling in such strata threatens …

The face failure of tunnels has been extensively studied. However, the effect of particle
shape on the failure process still remains unclear. In this paper, the progressive face failure …

Existing mechanism of simulating soil movement at tunnel face is generally based on the
translational or rotational velocity field, which is, to some extent, different from the real soil …

To enhance computational efficiency in reliability analysis, metamodeling has been widely
adopted for reliability assessment. This work develops an efficient reliability method which …

This paper aims at analyzing the influence of non-associated flow rule on passive face
instability for shallow shield tunnels. The influence exerted by dilation angle on the limit …

The face stability of a circular tunnel in cohesive–frictional soils was numerically and
theoretically investigated. Three-dimensional (3D) numerical simulations were first …

To better assess the stability of tunnel faces in cohesion-frictional soils, tunnel face stability
was investigated considering the soil arching effect in this study. An improved 3D rotational …

Based on the limit equilibrium method, a new three-dimensional progressive failure model,
which includes the upper loose zone and the lower slip zone, is proposed to analyze the …

Seepage induced by the difference of hydraulic head between the ground and the shield's
chamber will adversely affect the stability of tunnel face when tunnels are excavated through …

This paper aims at influence of relative density on deformation and failure characteristics for
a shield tunnel in sandy cobble strata. A series of model tests were performed for tunnels …