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The Scientific World Journal
Volume 2014, Article ID 784690, 9 pages
http://dx.doi.org/10.1155/2014/784690
Research Article

Structural Monitoring of Metro Infrastructure during Shield Tunneling Construction

1Hangzhou Metro Group Co., Ltd., Hangzhou 310020, China
2Department of Civil Engineering, Zhejiang University, Hangzhou 310058, China

Received 21 March 2014; Accepted 16 May 2014; Published 15 June 2014

Academic Editor: Fei Kang

Copyright © 2014 L. Ran et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Shield tunneling construction of metro infrastructure will continuously disturb the soils. The ground surface will be subjected to uplift or subsidence due to the deep excavation and the extrusion and consolidation of the soils. Implementation of the simultaneous monitoring with the shield tunnel construction will provide an effective reference in controlling the shield driving, while how to design and implement a safe, economic, and effective structural monitoring system for metro infrastructure is of great importance and necessity. This paper presents the general architecture of the shield construction of metro tunnels as well as the procedure of the artificial ground freezing construction of the metro-tunnel cross-passages. The design principles for metro infrastructure monitoring of the shield tunnel intervals in the Hangzhou Metro Line 1 are introduced. The detailed monitoring items and the specified alarming indices for construction monitoring of the shield tunneling are addressed, and the measured settlement variations at different monitoring locations are also presented.