Foundation Design and Construction Aspects — San Francisco – Oakland Bay Bridge East Spans Seismic Safety Project
Publication: Geotechnical Engineering for Transportation Projects
Abstract
The east span of the 3.5 km long SF-Oakland Bay bridge is supported by different types of foundations along its span. Its first 460 m section comprising twin concrete box-girders is supported by sands and rock on Yerba Buena Island. A 620 m long steel suspension span then bridges a 25 m deep channel that is formed in sediments overlying rock. Twin concrete box girder structures, each 2.4 km long, complete the stretch over the remainder of San Francisco Bay to the engineered earth fill landing at its east end. For most of its length, the Skyway bridges water 3 to 10 m deep over soft surficial Young Bay Mud. The foundation types include spread footings with hold-downs, steel and concrete piles that are set in drilled rock sockets up to 3 m in diameter and 2.5 m diameter steel tubular piles driven to penetrations of up to 100 m. The design and construction-related considerations are presented. The different foundation types, influences of the site geology and earthquake demands on the substructures are discussed. The seismic motions of the bridge superstructures and substructures, as well as the depth-varying soil motions, influenced the foundation design. Together with performance-based design criteria, including post-earthquake footing displacement limits, these seismic demands influenced various aspects of the foundation design, including the use of battered and vertical piles.
Get full access to this chapter
View all available purchase options and get full access to this chapter.
Information & Authors
Information
Published In
Copyright
© 2004 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Bays
- Bridge design
- Bridge engineering
- Bridge foundations
- Bridges
- Bridges (by type)
- Caissons
- Coastal engineering
- Coasts, oceans, ports, and waterways engineering
- Construction engineering
- Construction industry
- Construction management
- Design (by type)
- Earthquake engineering
- Engineering fundamentals
- Foundation construction
- Foundation design
- Foundations
- Geotechnical engineering
- Infrastructure construction
- Seismic design
- Span bridges
- Structural engineering
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.