Performance of North Anchorage Excavation of Fuma Yangtze River Bridge in Wanzhou, China
Publication: Journal of Performance of Constructed Facilities
Volume 33, Issue 3
Abstract
To ensure the safety of constructing the north anchorage excavation of Fuma Yangtze River Bridge, an extensive instrumentation program was carried out to monitor the performance of the excavation. This monitoring effort included the ground movements of soil outside the excavation zone, ground movements of the tops of piles, lateral deflections of piles, and prestress in cables. Based on an analysis of the monitoring data, the following findings were obtained: shallow landslides were induced by rainfall at several locations outside the excavation zone, and the movement directions of soil were consistent with the natural terrain. The horizontal displacements of the west and east top beams were generally larger than that of the north side. The vertical movements of the tops of the piles exhibited heave initially and then transitioned into settlement. The deflected profiles of the piles were similar, and the maximum lateral pile deflections were very close. The measured deformations and internal forces of the support system did not exceed the alarm values, which suggested that the excavation was in a stable state.
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Acknowledgments
The authors would like to thank the staff of the Fuma Yangtze River Bridge Project for their assistance with instruments installation and field monitoring.
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©2019 American Society of Civil Engineers.
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Received: Mar 18, 2018
Accepted: Oct 9, 2018
Published online: Feb 18, 2019
Published in print: Jun 1, 2019
Discussion open until: Jul 18, 2019
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