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At the request of the authors, this article has been retracted. The authors found that there was an error in the method used for the data processing as temperature change was not considered, and the results were inconsistent with those in the thesis of Bin ShengLin, who was acknowledged in the article. Thus, the accuracy of the reported data and the conclusions of this article are not reliable.

Journal of Sensors
Volume 2016 (2016), Article ID 2841753, 9 pages
Research Article

The Mechanical Performance of Shear Key of Immersed Tube Tunnel with Differential Foundation Settlement

Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China

Received 18 April 2015; Revised 12 August 2015; Accepted 4 October 2015

Academic Editor: Francesco Baldini

Copyright © 2016 Xiaolin Weng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A fiber Bragg grating (FBG) based sensor network was developed to monitor the strain distributions within immersed tube tunnel shear key, which was subjected to differential settlements. An improved packaging and installation method of the quasi-distributed sensor system was utilized, which not only ensured a high sensor survival rate but also achieved accurate measurement of axial strains. Based on the monitoring results, the stress variations of shear keys of the immersed tunnel joint, which originate from the buckling caused by the longitudinal differential siltation at seabed and the surface defects, were analyzed in detail.