CTC Item 26: Innovations in Transportation San Francisco Oakland - PowerPoint PPT Presentation

CTC Item 26: Innovations in Transportation – San Francisco Oakland Bay Bridge Implosions California Transportation Commission December 6, 2017 1

This is how i t started SFOBB Pier E9 Following the 1989 Loma Prieta Earthquake

Bay Area Faults and Major Roadways

Earthquake Reports

Innovation was the Direction the 1994 Northridge EQ Following Brian Maroney, PE, Dr. Engr. Chief Bridge Engineer for the Toll Bridge Seismic Retrofit Program Deputy Toll Bridge Program Manager California Department of Transportation

Examples of Innovation in the Toll Bridge Program  The Toll  Probabilistic Bridge Program Seismic Ground Motions (SFOBB (from LP to NR earthquakes)  East Spans, Dumbarton, Antioch and now spreading)  Probabilistic Estimating AB144   High Performance Concrete (but not exotic) TBPOC   A706M Reinforcing Steel Weekly cabinet Meetings  Large Diameter Battered Piles to control (environmental, design, Seismic Motions construction, PM)   Pile tip Acceptance Criteria Peer Review in Design & Construction  Overlapping staged Construction Contracts (SFOBB East Spans, Dumbarton &  Quarterly Reports to the Legislature Antioch)   Concept of Project & Program Contingency Pre-bid Contractor Technical Outreach   Pier 7 (“Campus Concept”) Pre-bid fabricator audits   Group Environmental Resource Agency Pre-bid engineering approval  Meetings (YBI rollout-rollin, OTD SSD, Cantilever)   Contractor-Constructed proto-types and Pier E3 Implosion Demonstration Project  proof tests Pile Driving Demonstration Project   BRIM (bridge information Management Caged Fish Study   Post-Future EQ User’s Manual Pile Driving Energy Attenuator and  Lane-by-Lane Deck Joint Demonstration   …and many many more. Blast Attenuation System 7

InYESovation Innovation Venn Diagram Knowledge Supportive Environment This is where In YES ovation happens Work 8 BHM-2016

The Environment Was of Extreme Value to A ll Involved

Cantilever

504' Spans Being Prepared fo r Lowering Without a Single Pile

504 Truss on Two Barges 13

504' Spans Original Construction

288 Truss on Solid Piers 15

288 Truss on 2 floating Barges 16

288' Spans Original Construction Work continues in cantilever beyond the temporary bent to reach the next pier Temporary bent

≈235’ ≈224’ Pier ≈215’ E3 ≈235’ ≈224’ ≈215’ 18

Marine Foundations Types Two General Types of Piers Pier Cap ~50’ ~ Water Line ~ Mud Line Hollow Voids Cell Wall Concrete Slab Concrete Pile Cap Typical: E4 – E5 Typical: E6 – E18 Concrete Caisson Timber Pile Supported 19

Weekly Schedule Updates 20

Weekly Schedule Updates 21

• Major Marine Piers (E3 – E18) Successfully Removed • With Environmental Responsibility • Under Budget • Ahead of Schedule 22

Blast Event Video Piers E9 and E10 Blast Event 5

1) Planning/Design Multi-Pier Implosion Video 2) Actual Multi-Pier Implosion Video 24

E14, E15, E16 Blast Day Plan

• What About the Remaining Marine Piers? • Piers E2 (YBI) and E19-E22 (OTD) Under Consideration for Retention – Increase focus on restoring public access to the Bay – Experience the new bridge – W ater access opportunities – Connect with history – Timeliness 26

Stakeholder Coordination 9

Thank you CTC and STA for your Leadership and Teamwork