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Explanation for twin tunnelling-induced surface settlements by changes in soil stiffness on account of stress history

Zhang, T., Taylor, R. N., Divall, S. ORCID: 0000-0001-9212-5115, Zheng, G., Sun, J., Stallebrass, S. E. ORCID: 0000-0002-3747-9524 and Goodey, R.J. ORCID: 0000-0002-9166-8393 (2019). Explanation for twin tunnelling-induced surface settlements by changes in soil stiffness on account of stress history. Tunnelling and Underground Space Technology, 85, pp. 160-169. doi: 10.1016/j.tust.2018.12.015

Abstract

In this article, a group of representative centrifuge tests were selected for numerical modelling to explain the surface settlements induced by sequential twin tunnelling. Both Modified Cam Clay model (MCC) and Three-Surface Kinematic Hardening model (3-SKH) were adopted in the simulation, which indicated the use of 3-SKH model conduced to mimicking more closely centrifuge model response. Via performing more contrastive numerical analyses with 3-SKH model, the influence of the first tunnel event on the stiffness of the soil around the second tunnel was quantitatively investigated, whereby the mechanism behind the observed surface settlements was finally made clear.

Publication Type: Article
Additional Information: © 2018 Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords: Twin tunnelling, Modified Cam Clay model, Three-Surface Kinematic Hardening model, Stiffness of soil
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Mathematics, Computer Science & Engineering > Engineering > Civil Engineering
URI: http://openaccess.city.ac.uk/id/eprint/21230
[img] Text - Accepted Version
This document is not freely accessible until 28 December 2019 due to copyright restrictions.
Available under License Creative Commons Attribution Non-commercial No Derivatives.

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