Analysis of TBM Lining Rings under Lack of Gap Fill: Practical Case of Ovalization and Crack Patterns
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 4
Abstract
This paper presents a practical approach to the study of defects in a tunnel-boring machine (TBM) ring due to the lack of gap filling during the construction phases. This lack of gap fill can produce an uncontrolled ovalization of the ring, which can lead to multicracking along the segments, in particular at the tunnel crown. After a brief description of the causes of the problem and the state of the art of ovalization in a TBM ring, a real case is analyzed considering the nonlinear moment curvature behavior of a reinforced concrete section based on the constitutive laws of the materials leading to a redistribution of internal forces. The results of this approach are compared with measured field data, in particular regarding the tunnel ovalization and the crack widths detected along the ring.
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 4 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 6, 2016
Accepted: Nov 8, 2016
Published online: Feb 15, 2017
Discussion open until: Jul 15, 2017
Published in print: Aug 1, 2017
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