Location

Chicago, Illinois

Session Start Date

4-29-2013

Session End Date

5-4-2013

Abstract

One of the challenging engineering aspects of the new Cowboys Stadium in Arlington, Texas was design of foundations for the retractable roof arches. The two arches, with a clear span of approximately 1,290 ft, produce a lateral thrust of approximately 19,500 kips at each foundation. The Author was on a consultancy board related to foundation design with Mr. Clyde Baker during the design phase of the project. Design criteria included a maximum allowable deflection of approximately 0.5 inches for the foundations. Adding to the complexity was the varying geologic conditions at each arch foundation location. After eliminating numerous options, the geotechnical design team proposed a foundation system consisting of slurry-placed diaphragm walls. This option resulted in a stiff foundation system that could meet the deflection criteria. Each of the four foundations consists of two parallel walls approximately 12.5 ft apart with 22.5 ft wide perpendicular end walls that form a box foundation. The foundations were designed using classical soil mechanics methodology, load testing of sacrificial panels, and the observational method. Details of the geotechnical design were presented in ASCE GSP-198 (2010). The foundations have performed well since completion in late 2008. The Author has “revisited” the foundations by performing 2-D finite element method (FEM) analysis of the foundation systems for comparison with the original classical soil mechanics methods. Similarities and differences between the two methods are presented and discussed. The comparative study can be useful when considering analysis methods for future complex foundation systems.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Seventh Conference

Publisher

Missouri University of Science and Technology

Publication Date

4-29-2013

Document Version

Final Version

Rights

© 2013 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

 
COinS
 
Apr 29th, 12:00 AM May 4th, 12:00 AM

Cowboys Stadium Roof Arch Foundations — Revisited

Chicago, Illinois

One of the challenging engineering aspects of the new Cowboys Stadium in Arlington, Texas was design of foundations for the retractable roof arches. The two arches, with a clear span of approximately 1,290 ft, produce a lateral thrust of approximately 19,500 kips at each foundation. The Author was on a consultancy board related to foundation design with Mr. Clyde Baker during the design phase of the project. Design criteria included a maximum allowable deflection of approximately 0.5 inches for the foundations. Adding to the complexity was the varying geologic conditions at each arch foundation location. After eliminating numerous options, the geotechnical design team proposed a foundation system consisting of slurry-placed diaphragm walls. This option resulted in a stiff foundation system that could meet the deflection criteria. Each of the four foundations consists of two parallel walls approximately 12.5 ft apart with 22.5 ft wide perpendicular end walls that form a box foundation. The foundations were designed using classical soil mechanics methodology, load testing of sacrificial panels, and the observational method. Details of the geotechnical design were presented in ASCE GSP-198 (2010). The foundations have performed well since completion in late 2008. The Author has “revisited” the foundations by performing 2-D finite element method (FEM) analysis of the foundation systems for comparison with the original classical soil mechanics methods. Similarities and differences between the two methods are presented and discussed. The comparative study can be useful when considering analysis methods for future complex foundation systems.