Research Note Prediction of Ground Settlement Influenced Mechanized Tunneling in Urban Areas using Empirical, Analytical and Numerical Methods

Document Type : Scientific - Research

Abstract

Nowadays, subways and urban tunnels are one of the most important infrastructures of public transportation network in big cities. Since the new tunnel projects should be constructed in under ground in populated urban areas, construction and implementation of this underground systems may cause damages to utilities, surface and subsurface structures. In this article, because of the importance of the issue of crossing the old urban areas and the need to reduce damages as much as possible, the distance between Stations N. 11 and 12 of Line 1 of Tabriz Subway that contains of old and traditional structure with old buildings of low strength has been studied. Due to existence of Cultural Heritage buildings in this distance, the study of settlements was performed using three different methods including Peck’s empirical method, Laganatan & Pollus’ analytical method and finite element method of numerical methods (using PlAXIS3D Tunnel software). Finally, the results of aforementioned methods were compared. The results show that the settlement values ​​obtained from the numerical model are more than the settlement values obtained from Peck’s empirical method and Laganatan & Pollus’ analytical method. Also, since the settlement values obtained from the numerical model are more than the allowable settlement values in urban and residential areas, it is needed to perform the necessary controlling strategies in this distance in order to make the excavating system able to cross this distance safely.

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References

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Quarterly Journal of Transportation Engineering
Volume 5, Issue 3 - Serial Number 3
April 2014
Pages 413-425

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History

  • Receive Date: 09 August 2014
  • Accept Date: 09 August 2014

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