AFP Considerations in Bridge Design

Transcription

1 AFP Considerations in Bridge Design Chris Gauer OGRA Bridge Expo November 5,

2 AFP Considerations in Bridge Design Bridge design for AFP work is unique Challenges are great, as are the opportunities 2

3 Presentation Topics Who is Infrastructure Ontario (IO)? What is IO s track record? Some IO example projects The AFP approach Design challenges and opportunities Case study: Structure quality oversight 3

4 Infrastructure Ontario (IO) Crown corporation responsible for building, managing, financing, and enhancing the value of Ontario public assets Supports Ontario s position as a North American leader for infrastructure delivery and innovation Provides value and exceptional service to its customers 4

5 IO s business lines Infrastructure Development Manages planning, design, and delivery of major public infrastructure projects Real Estate and Land Management Manages the Ontario government s real estate portfolio, the second largest and one of the oldest real estate portfolios in Canada Lending Dedicated to providing financing solutions to help public sector clients renew infrastructure across Ontario Commercial Projects Acts as an internal advisor to government clients to help generate revenue, reduce costs, and create efficiencies in how public services are delivered 5

6 What sets IO apart? There are four key differences that set IO aside from other similar agencies around the world: 1. Infrastructure Ontario was created with the authority to execute delivery Acts on behalf of the government on projects (i.e., signs project agreements) Stable track record of delivery and a pipeline of future projects provides certainty to the market Always reserves the right to terminate contract 2. IO was formed outside the public service Organization must abide by public sector guidelines, but leverages private sector expertise 3. IO s project delivery does not include core public services Services relate to the asset (i.e., HVAC, elevator repair, cleaning) Protects the rights of unionized workers 4. IO uses an availability-based Alternative Finance and Procurement project model Has a better risk profile than revenue-based P3 models 6

7 Track record on AFP projects Third-party assessment of IO s performance for the first 30 AFP projects to reach substantial completion (August 2013): 30 AFP projects totaling $12.9 billion in awarded contracts, delivering $2.65 billion in savings for Treasury Board approved budgets 29 of 30 projects were completed below their established contract budget 22 of 30 projects were delivered on or ahead of schedule, with six projects delayed by less than three months The findings of a second review will be issued in fall

8 AFP Projects: Right Honourable Herb Gray Parkway - Windsor Cost of Contract: $2.2B Initial works: $1.1B Structural Work: 14 bridge structures, 34,000m 2 retaining walls and 11,240m long landscaped tunnels, 1,482 precast girders Financial Close: Dec Completion Date: Phase 3: Dec. 15, 2014, Phase 4: Dec. 23, 2014, Substantial Completion: June

9 AFP Projects: Union Pearson Express Line Cost of Contract: $128.6 M Structural Work: Elevated rail guideway and terminus station at Toronto Pearson Terminal 1 Financial Close: Dec. 15,

10 AFP Projects: Highway 407 Phase 1 Cost of Work: $1 billion (NPV) Substantial Completion: Dec. 18, 2015 Structural Work: 58 bridge structures, 26 culverts, 2 major interchanges and 9 service interchanges Financial Close: May 18,

11 AFP Projects: York Region Transit Viva BRT Cost of Work: $500 million Structural Work: Widening of Highway 7 Structure over Highway 401 Financial Close: Spring 2015 Completion Date: Winter

12 The AFP Approach Project Company (ProjectCo) has a 30 year concession Design Build Finance Maintain A Design Build Team (Construction JV) is responsible to deliver the work to ProjectCo Firm commitment to cost and schedule, while meeting the project quality specifications Designers report to construction lead Design and construction must meet standards and consider life cycle costs/handback requirements 12

13 Owner s Role Changes with AFP Traditional Model Single Creative Source Functional Program Concept Drawings Working Design Tender and Award Construction Same Regardless of Model Multiple Creative Sources Functional Program Performance Output Specifications Bidder s Concept Drawings Bidder s Concept Drawings Bidder s Concept Drawings Winning Bidder Working Design Construction AFP Model Confidential Design Review Meetings 13

14 Design Challenges and Opportunities Multiple structures to design Optimize or build structures quickly? Consistency of design or customize by site? Schedule drives the design Accelerated design delivery Incremental design approach Geotechnical and foundations input Design structures then modify for soil conditions Flexibility to foundation elements (piles/caissons) 14

15 Design Challenges and Opportunities Bid Design process requires creative approach Optimal designs with optional approaches Variations in span, foundations and girder types Interim/ultimate configurations Layout, road safety, clear zone Design to contractor s strengths Innovation and standards Introduction of new materials/concepts? How to document/present changes to owner? Owner acceptance is not a given, but a great opportunity 15

16 Design Challenges and Opportunities Projects under ISO 9000 Quality System Quality Control and Assurance by Contractors Bridge engineer Certification of work Staff on-site presence to adequately witness work Control of drawings, changes and non-conformance response Overview of testing, reports and site data Can the Engineer Stop Work? Feedback loop and approval of changes Design involvement in field conditions, circumstances Prepare Record and Shop drawings, tolerances NCR process and disposition of repairs 16

17 Case Study: Quality and Oversight Right Honourable Herb Gray Parkway Challenges with the proposal for NU Girders First time used in Ontario Field fabrication of girders and local girder supply Field Plant CSA certification Tack welding approval/welders qualifications Use of welded wire mesh in web new ProjectCo proceeded At Risk Created challenges in Contract management Concurrent review and construction process 17

18 Case Study: Quality and Oversight Right Honourable Herb Gray Parkway Girder fabrication quality concerns Girder design/capacity questions: welding/mesh Long term durability: cover/reinforcing One girder found to have improperly positioned pre-stressed strands Girders were replaced by ProjectCo No cost to HMQ, project was delayed Lesson Learned More presence in fabrication facility by MTO Greater urgency in review/acceptance process Process is required for changes from local practice 18

19 Case Study: Quality and Oversight In AFP work, the design and construction of Bridges and Structures are a critical element Quality cannot be compromised Structures require a 75 year life Safety and durability must be delivered Solution: Structural Engineering certification Local knowledge: integral to design, QA and certification performed by RAQS-qualified Consultants Reviewed in accordance with the MTO CAIT manual 19

20 Case Study Innovation Opportunities exist in pursuit stage to innovate Must be within context of project specifications Compliance risk of different approaches More opportunities during design delivery Meet constrained conditions Address localized concerns Interact and optimize designs Facilitate traffic management Conform to Road Safety Requirements 20

21 Southeast Anthony Henday Drive Edmonton, Alberta km Highway of four and six lane highway 2 freeway to freeway Interchanges 3 Interchanges Two major Rail crossings 20 Bridges 21

22 Southeast Anthony Henday Kinked steel girder bridge at 3 rd level bridge structure 22

23 Southeast Anthony Henday Use of haunched girders over railway for vertical clearance Removal of mid-span MSE wall 23

24 Southeast Anthony Henday Significant difference in the structure foundation & bridge substructure needs AFP Bridge Design DBB Bridge Design Traffic detour was needed to accommodate cast in place construction of new bridge 24

25 Southeast Anthony Henday Abutment offset and vertical walls to minimize spans Interim bridge configuration and ultimate embankment placement Interchange reconfiguration to reduce bridge deck area 25

26 Conclusions AFP projects require and do support Innovation Innovation requires careful attention to: Design approvals Material alternatives Quality delivery 26