Central Artery/Tunnel Project Excavation Induced Ground Deformations
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 134, Issue 9
Abstract
Estimate of deformations around urban excavations is a primary concern for designers, contractors, owners, and potentially affected third parties. Significant efforts have gone into the development of empirically based methods to estimate deformations relying on a large number of case histories. The construction of the deep excavations for the central artery/tunnel project provides valuable information on observed deformations due to the construction of these excavations. Lateral deformations and surface settlements for three construction contracts are collected and summarized in a form similar to published empirical charts. The stiff support system used in these braced excavation and the embedment of the wall into stiff strata control deformations to minimal levels. The data show that surface settlements, although small, extend farther away from the excavation than previously reported.
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Acknowledgments
The data used in this note were made available to the writers through the efforts of many individuals involved with the CAT project design and construction over a period of many years. The writers would like to thank, in particular, Dan Bobrow, David Druss, Brian Brenner, Prabir Das, and Chris Eitel for facilitating access to this data. The writers would like to also acknowledge the support of the Federal Highway Administration and Mr. Victor Elias. This material is based upon work supported in part by the National Science Foundation under Grant No. NSFCMS 02-19123 under program director Dr. R. Fragaszy. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the writers and do not necessarily reflect the views of the National Science Foundation and Federal Highway Administration.
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Information & Authors
Information
Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 134 • Issue 9 • September 2008
Pages: 1399 - 1406
Copyright
© 2008 ASCE.
History
Received: Nov 3, 2006
Accepted: Feb 7, 2008
Published online: Sep 1, 2008
Published in print: Sep 2008
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