Journal
GEOTECHNIQUE
Volume 64, Issue 10, Pages 776-786Publisher
ICE PUBLISHING
DOI: 10.1680/geot.14.P.024
Keywords
clays; deformations; design; plasticity; theoretical analysis; tunnels
Categories
Ask authors/readers for more resources
The paper presents a three-dimensional mobilised strength design formulation for evaluating the face 'take' volume loss of an advancing tunnel in clays. A closed-form analytical expression for an incremental displacement field per unit advancement of the tunnel is obtained. This displacement field is integrated to result in normalised (by volume loss) three-dimensional settlement trough and cumulative strain field for the mobilised strength design calculation. Using energy conservation, an expression for the expected volume loss is obtained. Normalised solutions, relating the volume loss and load factors, are derived and presented for idealised stress-strain curves of the form of power and exponential functions. The practical use of the developed model is demonstrated using several tunnelling cases in London Clay. The predictions of the model are found to be in fair agreement with the observed volume losses in the field.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available