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Ground Motion Amplification Induced by Shallow Circular Tunnel in Soft Soil

  • Mohsen Mousivand
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)

Abstract

In recent years, there has been an increasing interest in tunnel excavation to resolve traffic problems especially in populated urban areas. However, tunnel excavations could seriously affect ground surface behavior static and dynamic load conditions. Several studies have estimated the ground motion induced by tunnels in homogeneous, isotropic and linear elastic soils, however there is still insufficient data on behavior in real conditions such as non-linear and anisotropic behavior of soil in response to tunnel excavation. The aim of this paper is to examine the ground motion amplification due to excavation of a circular tunnel in shallow depth in soft soil. To this aim, at first, using a verified finite element code, effective parameters of problem including depth and ductility of tunnel, frequency content and soil material set are investigated. Then, the effects of underground circular structure on dynamic response of ground are assessed according to real time history earthquakes. Finally the results are compared with green field condition. The results of this study indicate that underground circular structures have significant effects on ground motion amplification. These effects can be twice as large as green field conditions.

Keywords

Tunnel Finite element code Soft soil Shallow depth Dynamic analysis 

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Islamic Azad UniversityTehranIran

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