Comprehensive Influence Analysis of Multiple Parameters on the Safety Thickness against Water Inrush in Shield Tunnel
Publication: International Journal of Geomechanics
Volume 20, Issue 12
Abstract
This paper focuses on the construction of urban rail transit projects to prevent the risk of water inrush disasters faced during subway construction in cities with abundant groundwater and well-developed karst landforms. In view of the reserved safety thickness for the tunnel face with an anterosuperior karst cave filled with water in urban subway construction, the authors study the influence law and response sensitivity of different types and diameters of the shield machine cutter head and different diameters and water pressure of the anterosuperior karst cave filled with water on the safety thickness. The authors relied on the actual working conditions of the Wangfuzhuang station to the Dayangzhuang station section of the Jinan Metro Line R1 phase I project for this study used the fluid–structure coupling method of COMSOL Multiphysics 5.3 software to simulate the process of shield tunneling and the time of water inrush, and combined the three-dimensional finite-element numerical simulation results and multiple linear regression method to deduce the formula of the reserved safety thickness for the tunnel face with an anterosuperior karst cave filled with water. The conclusions can be used to guide shield excavation in karst areas of urban subways.
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Acknowledgments
This work was supported by the Research and Development Plan of Shandong Province (No. 2019JZZY010428), the National Science Fund for Excellent Young Scholars (No. 51722904), the National Natural Science Foundation of China (No. 51679131, 51809158, 51909143), and Transportation Technology Program of Shandong Province, China (No. 2019B47_1).
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Published In
International Journal of Geomechanics
Volume 20 • Issue 12 • December 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Jan 31, 2020
Accepted: Jul 30, 2020
Published online: Sep 24, 2020
Published in print: Dec 1, 2020
Discussion open until: Feb 24, 2021
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