Observed Performance of a Sheetpile-Supported Excavation in Chicago Clays
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VIEW THE REPLYPublication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 145, Issue 2
Abstract
Ground surface settlements and lateral wall movements measured during construction of a 13.1–18.0 m deep mixed-support excavation in Chicago are presented. The excavation was supported with sheetpile walls, two or three tieback levels, and one level of internal diagonal bracing. This paper describes the measured ground and wall responses, correlates the responses with construction activities, and evaluates the responses in light of the subsurface conditions, support system stiffness, and other nearby excavations. Expected performance based on semiempirical correlations is compared with the measured response. Lateral wall movements at this and an adjacent excavation are used to indicate the accuracy with which one may be expected, at best, to predict lateral wall deformations in similar conditions.
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Acknowledgments
The funding for the work reported herein was provided by National Science Foundation Grant No. CMMI-1603060. The support of Dr. Richard Fragaszy is greatly appreciated. The cooperation of Mr. Jay Baehr and Ms. Jo Lemieux-Murphy of Facilities Management at Northwestern University was instrumental in providing unfettered access to data collected by a variety of subcontractors.
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Journal of Geotechnical and Geoenvironmental Engineering
Volume 145 • Issue 2 • February 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: Feb 13, 2018
Accepted: Aug 9, 2018
Published online: Nov 30, 2018
Published in print: Feb 1, 2019
Discussion open until: Apr 30, 2019
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