Undrained stability of a square tunnel in a soil whose strength increases linearly with depth

Finite Element Limit Analysis of Passive Earth Resistance in Cohesionless Soils

“…These techniques have removed the need to search for accurate upper bound mechanisms and statically admissible stressˆelds analytically. The techniques have been used successfully to predict the bearing capacity of layered soils (Shiau et al, 2003), the load capacity of soil anchors (Meriˆeld et al, 2003;Meriˆeld et al, 2005), the stability of tunnels (Sloan and Assadi, 1991), the behaviour of foundations under combined loading (Ukritchon et al, 1998), the bearing capacity of three-dimensional foundations (Salgado et al, 2004;Lyamin et al, 2007), and the formation of sinkholes (Augarde et al, 2003). In this paper, we apply theˆnite element bound methods to the classical passive earth pressure problem.…”

Influence of pore water pressure on upper bound analysis of collapse shape for square tunnel in Hoek-Brown media

“…In order to obtain the upper and lower solutions of stability number, ASSADI and SLOAN [6] employed a linear programming to optimize the objective function. In a similar way, SLOAN and ASSADI [7] studied the undrained stability of a shallow square tunnel in a soil with strength increasing linearly with the depth.…”

Stability analysis of unlined elliptical tunnel using finite element upper-bound method with rigid translatory moving elements

“…Assadi and Sloan (1991) studied the active and passive undrained failure of square tunnels. Sloan and Assadi (1991) and Wilson et al (2013) discussed the stability of shallow square tunnels in soils whose undrained shear strength increases linearly with depth. ) and, later, Yamamoto et al (2010, 2011b investigated the stability of square tunnels in cohesive-frictional soils.…”