Performance of Jet-Grouted Partition Walls in Mitigating the Effects of Shield-Tunnel Construction on Adjacent Piled Structures
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 2
Abstract
Protective interventions are often needed to protect sensitive buildings from ground deformation induced by tunneling. This paper evaluates the effectiveness of underground jet-grouted partition wall in mitigating the effects of shield-tunnel construction on existing piled structures by means of numerical analysis and field monitoring. It is shown that the tunneling-induced displacements field can be modified by the underground partition wall in different ways depending on the combination of influential factors, such as wall stiffness, partition range angle, and insert depth below the tunnel invert. The results also indicate that the presence of the partition wall can relieve the existing piles from suffering from differential displacement, thereby improving the mechanical performance of pile–pier interaction. The reasonable agreement found between the observed field measurements and the numerical results demonstrates that underground jet-grouted partition wall can serve as an effective recourse of ground movement control given the need of tunneling nearby piled structures.
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Acknowledgments
The work presented in this paper was supported by the China Postdoctoral Science Foundation (No. 2016M592451) and the National Natural Science Foundation of China (No. 51608539). The authors appreciate the assistance of the Changsha Metro Group Co. Ltd. in providing the presented field case.
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 2 • April 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Feb 3, 2016
Accepted: Aug 30, 2016
Published online: Oct 19, 2016
Discussion open until: Mar 19, 2017
Published in print: Apr 1, 2017
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