Performance of an Overexcavated Metro Station and Facilities Nearby
Publication: Journal of Performance of Constructed Facilities
Volume 26, Issue 3
Abstract
This paper examines the performance of an overexcavated metro station in soft clay within Shanghai metropolitan area, in which there are many high-rise buildings and buried utility pipelines in the proximity. The excavation was supported by stiff concrete diaphragm walls braced by steel pipes. The measured performance included deflections of diaphragm walls, ground settlements, and settlements of the adjacent buildings and utility pipelines. On the basis of daily monitored data, the effects of overexcavation on wall deflections, deflection rates, and the locations in which the maximum wall deflections and the maximum wall deflection rates occurred were investigated. For those buildings in the proximity, the heavy high-rise steel-reinforced concrete buildings supported by deep foundations experienced limited uniform settlements, whereas the light brick buildings resting on shallow foundations experienced substantial total and differential settlements. For the adjacent utility pipelines, the excavation-induced settlements were relatively uniform.
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Acknowledgments
Many organizations contributed to the success of this project and special thanks are due to Shanghai Geotechnical Investigations and Design Institute Co., Ltd. for providing the detailed information of the soil conditions at the project site and Shanghai Institute of Geological Science (SIGS) for field data collection. Finally, the financial supports from the National Natural Science Foundation of China (NSFC Grant No. 50908172), Kwang-Hua Funds for College of Civil Engineering at Tongji University, the Fundamental Research Funds for the Central Universities, and the project sponsored by SRF for ROCS, SEM were gratefully acknowledged. Finally, the authors would like to thank the two anonymous reviewers and the editor for their great comments, which improved the presentation of this study.
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Information
Published In
Journal of Performance of Constructed Facilities
Volume 26 • Issue 3 • June 2012
Pages: 241 - 254
Copyright
© 2012. American Society of Civil Engineers.
History
Received: May 12, 2010
Accepted: Mar 11, 2011
Published online: Mar 14, 2011
Published in print: Jun 1, 2012
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