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Durham University

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Publication details for Professor Ashraf Osman

Osman, A. S., Mair, R. J. & Bolton, M. D. (2006). On the kinematics of 2D tunnel collapse in undrained clay. Géotechnique 56(9): 585-595.

Author(s) from Durham


A kinematic plastic solution has been developed for
ground movements around a shallow, unlined tunnel
embedded within an undrained clay layer. In this solution,
the pattern of deformation around the tunnel is
idealised by a simple plastic deformation mechanism.
Within the boundaries of the deformation mechanism,
the soil is required to shear compatibly and continuously
with no relative sliding at the boundaries. The soil is
regarded here as a rigid plastic (Tresca) material. The
plausibility of the proposed mechanism is demonstrated
by comparison with limit analysis calculations and centrifuge
test results.


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