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Finite Element Analysis of Ground Movements and Geotechnical Capacity Loss Induced Due to Shield Tunnels

  • Animesh SharmaEmail author
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 29)

Abstract

Due to an exponential increase in urbanization, there is a growing need for a systematic mass transportation system in developed and developing countries. A reasonable solution is underground transportation system like tunnels. An inevitable aspect of the construction of underground tunnel in urban locale is the ground movements associated with it. With that under consideration, the current study encases the assessment of settlements induced due to bored tunnels using finite element method. Current study undertakes a detailed analysis of the parameters affecting the ground movements and also investigates the geotechnical capacity loss associated with it. The observed results from finite element analysis are then compared with the conventional theoretical results. Based on observed trends, geotechnical parametric factors are proposed considering which a more precise range of settlements can be obtained. The study investigates the phenomenon of the associated geotechnical loss induced due to bored tunnels by simulating twin bored tunnels, i.e. two tunnels in close proximity, with one passing first, followed by the second bored tunnel. The results suggested that there was a considerable reduction in geotechnical capacity loss generated due to associated ground movements. The study concludes that upon accounting the geotechnical factors and loss associated, a more precise assessment of the ground movements can be arrived at and hence an even precise assessment of the impact upon the structures in proximity.

Keywords

Urban tunnels Ground movements Geotechnical loss Settlements PLAXIS Finite element analysis 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Geotechnical Engineer, Afcons Infrastructure LtdKolkataIndia

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