3D-fem analysis of shield tunnel construction with ground-spring model
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Publication Details
Author list: Chaipanna P., Jongpradist P.
Publication year: 2017
Journal: International Journal of GEOMATE (2186-2982)
Volume number: 12
Issue number: 31
Start page: 58
End page: 62
Number of pages: 5
ISSN: 2186-2982
Languages: English-Great Britain (EN-GB)
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Abstract
The shield tunneling has been extensively implemented for construction of underground transportation systems in urban areas. Reports on tunnel segment damage during tunnel construction become increasing. The jack thrust force is the essential cause of damage to the segment. The objective of this article is to present the model which analyzes the behavior of tunnel lining during construction. The model consists of five rings and ten segments for each ring connected together with the shear springs which represent the segment joints and ring joints. The zero thickness interface elements are used to model the segment interface behavior and soil stiffness is represented by mean of ground springs. All relevant construction loads are taken into account in the analysis. The ground spring model is implemented into FEM program ABAQUS to analyze the behavior of segmental lining during construction along straight and curve alignments. The analysis results agree with the measurement data and confirm that the stresses of tunnel segments are governed by jack thrust force. The ground-spring model has been proven to be appropriate for analysis of behavior of the tunnel segments. ฉ Int. J. of GEOMATE. All rights reserved.
Keywords
And Tunneling construction, Soil-Tunnel Interaction
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