Analysis and Performance of the Excavation for the Chicago-State Subway Renovation Project and its Effects on Adjacent Structures

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TECHNICAL REPORT DOCUMENTATION AND DISCLAIMER

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1. Report No. A428, A435	2. Government Accession No.	3. Recipient's Catalog No.
4. Title and Subtitle Analysis and Performance of the Excavation for the Chicago-State Subway Renovation Project and its Effects on Adjacent Structures		5. Report Date September 27, 2002
		6. Performing Organization Code
7. Author/s Richard J. Finno, Michele Calvello, and Sebastian L. Bryson		8. Performing Organization Report No.
9. Performing Organization Name and Address Department of Civil and Environmental Engineering, Northwestern University , 2145 Sheridan Road, Evanston, IL 60208		10. Work Unit No. (TRAIS)
		11. Contract or Grant No. DTRS98-G-0016
12. Sponsoring Organization Name and Address U.S. Department of Transportation Research and Special Programs Administration 400 7^th Street, SW Washington, DC 20590-0001		13. Type of Report and Period Covered Final Report, January 2000 – December 2001
		14. Sponsoring Agency Code
15. Supplementary Notes
16. Abstract The report summarizes field performance observations made during the excavation and construction of the Chicago Avenue and State Street Subway renovation project in Chicago, IL. It also summarizes a numerical procedure that “objectively” updates design predictions of deformations for supported excavations in clay. The monitoring data from the Chicago-State excavation are used as observations in an inverse analysis that calibrates the numerical model of the excavation. The report shows how the updated “predictions” made at an early stage of construction can be used to accurately “predict” the responses at the later stages of the project.
17. Key Words Excavation, Clay, Field, Finite element method, Tiebacks	18. Distribution Statement No Restrictions
19. Security Classification (of this report) Unclassified	20. Security Classification (of this page) Unclassified	21. No. Of Pages 347	22. Price

DISCLAIMER:

The contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the information presented herein. This document is disseminated under the sponsorship of the Department of Transportation, University Transportation Centers Program, in the interest of information exchange. The U.S. Government assumes no liability for the contents or use thereof.