Application of Value Engineering – The Crosstown Project · Application of Value Engineering –...
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Application of Value Engineering –The Crosstown Project
Presented To: CSVA Conference, Toronto
Presented by: Rick Thompson, Chief Project Manager – SRT/Yards
November 15, 2011
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1. Eglinton Scarborough Crosstown Overview
2. Value Engineering for the Crosstown Project
3. Examples of VE Workshops
(i) SRT Conversion(ii) Station Box Length(iii) Tunnel Design
4. Questions
11/18/2011Application of VE - The Crosstown Project
Agenda2
Agenda
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1. Eglinton Scarborough Crosstown Overview
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Agenda
Application of VE - The Crosstown ProjectAgenda
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Eglinton-Scarborough Crosstown
Application of Value Engineering 1 - The Crosstown Project
11/15/2011
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Eglinton Corridor
11/15/2011Application of Value Engineering
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SRT
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Maintenance and Storage Facilities (MSFs)
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Eglinton-Scarborough Crosstown
• Funded by the Province through Metrolinx - $8.4 Billion
• TTC responsible for delivery of the project, on behalf of Metrolinx
• Support future growth across the City
• Provide connections to the TTC subway and GO Transit
• Implement PRESTO transit fare card
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Eglinton-Scarborough Crosstown
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Key facts:
• 25 km east-west corridor between Scarborough Centre and Jane Street / Black Creek
• 19 km underground tunnel (Jane/Black Creek to Kennedy)
• 6km through-running service along upgraded SRT to Scarborough Centre
• Up to 26 stations
• 3 interchanges with subway
• Two Maintenance and Storage Facilities (MSF)
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Light Rail Vehicles
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Light Rail Vehicles
Bombardier Awarded Contract in June 2010
New LRV features:
• Low floor and accessible
• Audio and visual passenger information
• Enhanced noise and vibration mitigation• 31m long• Will operate in 3 car consist
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Potential Interior Layout
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• Deliver quality product
• Deliver accessible product
• Minimize property and construction impacts
• Minimize disruption to extensive utilities around stations
• Accommodate local traffic during construction
Goals
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• SRT – Kennedy to McCowan – 2019
• Eglinton – Keele to Kennedy – target 2020
Project Implementation
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– Nov. 2011 – Tunnels – Keele to Laird – 90% – Dec. 2011 – SRT Conversion – 30% – Dec. 2011 – SRT Kennedy Station – 10% – Early 2012 – Stations – Keele to Chaplin – 10%
Project Status - Design
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• Jul. 2011 – West Launch Shaft @ Black Creek
• Summer 2012 – Tunnelling starts (west to east)
• 2014 – Eglinton Stations Start
• 2013/2014 – Advanced SRT construction
• Sep. 2015 – SRT shut down
• Sep. 2015 - – McCowan Maintenance & Storage Facility.
Project Status - Construction
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Agenda17
Agenda
1. Eglinton Scarborough Crosstown Overview
2. Value Engineering for the Crosstown Project
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Best value at lowest cost.
VE Objective
Application of VE2-Value Engineering for the Crosstown Project
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In achieving best value at lowest cost, must:• Provide safe operation
• Adhere to design requirements
• Provide low life-cycle cost
• Provide high performance- reliability- availability- maintainability
• Be functional and aesthetically pleasing for customers.
VE Objective
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Value Engineering
– Traditionally perceived as a means to reduce costs. – Can also be applied to improve performance.– Measures to determine performance are specific to
each VE
What is Value?
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Creative
How Achieve Objectives?
11/15/2011 Application of VE2-Value Engineering for the Crosstown Project
The Box☺
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Pre-Judge
Defensive
Creative
“No” “No”
How Achieve Objectives?
11/15/2011 Application of VE2-Value Engineering for the Crosstown Project
☺ ☺
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How Achieve Objectives?
• Instil VE as a culture
• Promote creativity and an open-minded approach
• Optimize designs to deliver maximum value at the lowest achievable life-cycle cost
• Perform VE early to achieve greatest benefit
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VE Benefits
• Encourages design creativity
• Builds confidence within project teams
• Provides a mechanism to deliver optimum value and quality service
• Provides confidence to funding partners.
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3 Types of VE
• Mainstream
• Formal
• Construction
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3 Types of VE - Continued
Mainstream VE:
• Every day decisions throughout the design process
• Good engineering practice
• Request design variances
• Innovative design
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3 Types of VE - ContinuedFormal VE:• 3 VE Consultants retained
• VE Consultant retains appropriate specialists
• Perform at or before 30% design• 10% - evaluate options• 30% - evaluate selected options
• Constructibility
• To be used for:• Stations• Tunnels• Maintenance Facilities
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Formal VE Process – 5 Day Workshop
• Day 1 - Presentation by project team and site visit
• Days 2-4 - VE Consultant reviews project documentation and generates analysis of options. VE Consultant may contact project team for additional information.
• Day 5 - VE Consultant delivers presentation of VE recommendations.
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Formal VE Process Initial Evaluation
• VE Consultant provides draft report
• Project team reviews.
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Formal VE ProcessFinal Evaluation
• Project team develops position on each recommendation
• Project team modifies designs accordingly
• VE Register is updated with selected options.
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VE Register
• Active list of selected VE recommendations
• Important tool to convey message to other teams
• VE updates issued regularly
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3 Types of VE - Continued
Construction VE:
• Contracts encourage contractors to submit alternatives
• Internal evaluation
• Cost benefits shared with contractor
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11/15/11 Application of VE - The Crosstown Project3(i)– SRT Conversion
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Agenda
1. Eglinton Scarborough Crosstown Overview
2. Value Engineering for the Crosstown Project
3. Examples of VE Workshops
(i) SRT Conversion
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SRT Conversion
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Elevated Section• Midland Station• Scarborough CC Stn• McCowan Station
Tunnel Section
At-Grade Section• Lawrence Station• Ellesmere Station
Kennedy Station
SRT Conversion
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SRT Conversion- New LRT Vehicle
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Mark 1 Flexity
• Heavier (Axle load 12 vs 6 tonnes)• Low floor• Catenary traction power• Longer consist (93m vs 51m)
Application of VE - The Crosstown Project3(i)– SRT Conversion
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SRT Conversion - Scope
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• Design was at approximately 10% • Improve design by focusing on high cost items
and improving project performance
• Assist in selection of design options
VE Workshop – SRT Conversion
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Establish Performance Attributes:
Transit OperationsUser AccessibilityMaintainability Construction ImpactsEnvironmental ImpactsProject ScheduleRisk
VE Workshop – SRT Conversion
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VE Workshop – SRT Conversion Performance Attribute Weighting
PERFORMANCE ATTRIBUTE MATRIXWhich attribute is more important to the project? TOTAL %
Transit Operations A A/B A A A A/F A 6.0 21.4%
User Accessibility B B B B B/F B 6.0 21.4%
Maintainability C C C C/F C 4.5 16.1%
Construction Impacts D E F D 2.0 7.1%
Environmental Impacts E F E 3.0 10.7%
Project Schedule F F 5.5 19.6%
Risks G 1.0 3.6%
28.0 100%
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Modify Roof Over Track
Proposed At-GradeStation Modification
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N
Extend Platform
Lower Platform
Application of VE - The Crosstown Project3(i)– SRT Conversion
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Validation - The Base Case design has the highest Value
OVERALL PERFORMANCE Performance (P)
% ChangePerformance
Cost (C) % Savings Value Index
(P/C)% Value
Improvement
Baseline 500 $237.7 2.10
A-8 Replace framing with thinner, shop fabricated beams 454 -9% $228.4 4% 1.99 -6%
A-4a Platform canopies only, no roof over tracks, raise track 369 -26% $223.3 6% 1.65 -21%
A-4b At extensions, no roof, only platform canopies 435 -13% $227.5 4% 1.91 -9%
VE Evaluation of At-Grade Stations
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SProposed Elevated Station ModificationRaise Roof over Track
Strengthen Track DeckAnd Raise Track
Strengthen Joints
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N
Extend Platform
VE Supported Base Case
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SRT Conversion - Tunnel
Scope
Modify Tunnel to accommodate larger vehicle
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Tunnel ‐ Roof ModificationProposed Tunnel Modification
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Remove existing tunnel roof
Raise support columns & walls and add roof
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Tunnel Modification - Sequencing
1. Construct detour and remove mainline
2. Remove tunnel roof, raise support columns and walls
3. Cast new tunnel roof
4. Re-install GO Transit mainline
5. Remove detour
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Tunnel Modification - Sequencing
6. VE: Use existing spur as detour (not acceptable to GO)
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Elevated Guideway Existing Structure
SRT ConversionElevated Structure with New Vehicle
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Overstressed due to 100% additional load
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• Option 1 –Fibre Reinforced Polymer (FRP)
• Option 2 - Conventional Reinforcing
• Option 3 - New Superstructure
• Option 4 - New Guideway
• VE did not identify any new options
Elevated Structure Modification Options Identified by Project Team
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• Quality Control is a challenge
• Weather dependant
• Relatively new and on-going research
• VE did not recommend
VE EvaluationOption 1 - FRP Reinforcing
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Add Concrete Slab With 20 Dowels Per Metre
External Stirrups For Girder
Exterior Post-tensioning
Option 2. Conventional Reinforcing
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Exterior Post-tensioning
Application of VE - The Crosstown Project3(i)– SRT Conversion
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VE Evaluation Option 2 - Conventional Reinforcing Evaluation
• Requires 40,000 dowels• Existing structure participates in live load
– Cracking Potential is High• Corrosion
• Only expect 25 year life• VE did not recommend
11/15/2011 Application of VE - The Crosstown Project3(i)– SRT Conversion
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Elevated Guideway Option 2 New Superstructure
EXISTING PIERPier Modification
Option 3. New Superstructure
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Proposed Superstructure
Application of VE - The Crosstown Project3(i)– SRT Conversion
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• Higher capital cost• 75 year life• Recommended by VE
VE Evaluation Option 3 - New Superstructure on Existing Piers/Foundations
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• Highest capital cost• VE did not recommend
Option 4. New Guideway-Superstructure and Piers
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• Life Cycle Cost Analysis conducted by TTC• Results support VE recommendation
Elevated Structure - VE Follow-Up
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• Did not result in capital cost savings• Did result in improved performance• Assisted in selection of options• Supported base case designs
VE Workshop – SRT Conversion Summary
11/15/2011 Application of VE - The Crosstown Project3(i)– SRT Conversion
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11/15/11 Application of VE - The Crosstown Project3 (ii) Station Box Length
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Agenda
1. Eglinton Scarborough Crosstown Overview
2. Value Engineering for the Crosstown Project
3. Examples of VE Workshops
(i) SRT Conversion(ii) Station Box Length
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Station Design
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3 (ii) Station Box Length
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Station Location
11/15/2011
• Minimize property and construction impacts
• Minimize disruption to extensive utilities around stations
• Accommodate local traffic during construction
Application of VE - The Crosstown Project3 (ii) Station Box Length
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Station Construction
• Smaller station– Less impact– Less cost– Shorter schedule
• VE performed on Station Box Length
Application of VE - The Crosstown Project3 (ii) Station Box Length
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Station Box Length
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Station Box Length
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Station Box Length
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Station Box Length
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Relocate Vent Fans
Application of VE - The Crosstown Project3 (ii) Station Box Length
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Station Box Length
11/15/2011
95 m
Application of VE - The Crosstown Project3 (ii) Station Box Length
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Station Box Length
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VE Alternative Box Length Reduction
Cost Saving per Station
Vent fans outside station box at entrance buildings 22m $ 3.3 M
Delete fire fighter access shafts (in‐line stations) 3m $ 1.0 M
Platform length reduced from 97 to 95m 2m $ 0.6 M
POTENTIAL COST SAVING PER IN‐LINE STATION (Location Specific)
27m $ 4.9 M
TOTAL POTENTIAL COST SAVING $ 100 M
Application of VE - The Crosstown Project3 (ii) Station Box Length
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Agenda
1. Eglinton Scarborough Crosstown Overview
2. Value Engineering for the Crosstown Project
3. Examples of VE Workshops
(i) SRT Conversion(ii) Station Box Length(iii) Tunnel Design
Application of VE- The Crosstown Project3 (iii) – Tunnel Design
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Eglinton Tunnels
Scope
• 19 km tunnel from Kennedy to West Launch Shaft (Black Creek Drive)
11/15/2011 Application of VE- The Crosstown Project3 (iii) – Tunnel Design
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Eglinton Tunnels
Mainstream VE:
Tunnelling vs cut and cover
• Tunnelling more cost effective for long distances• Less impact to community
Tunnel Diameter
11/15/2011 Application of VE- The Crosstown Project3 (iii) – Tunnel Design
• Minimize to reduce costs
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Eglinton Tunnel Boring
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• 4 TBMs have been purchased
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Constructing New Stations & Tunnels
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Formal VE – Tunnel Design
Scope
• VE performed on 60% tunnel design.
• VE report under review
11/15/2011 Application of VE- The Crosstown Project3 (iii) – Tunnel Design
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Eglinton Tunnel Design
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VE Alternative Cost Saving (Preliminary)
Excavate station boxes from Dufferin east to Yonge prior to tunnelling
$ 59 M
Utilize secant walls as part of the permanent station structure $ 44 M
Use Eglinton West Station box to extract and launch TBMs $ 30 M
Utilize longer TBM tunnel drives $ 26 M
POTENTIAL COST SAVINGS (TOP 4 BIG WINS) $ 159 M
Application of VE- The Crosstown Project3 (iii) – Tunnel Design
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Tunnel Construction
Application of VE- The Crosstown Project3 (iii) – Tunnel Design
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11/15/11 Application of VE - The Crosstown Project4 – Questions
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Agenda
1. Eglinton Scarborough Crosstown Overview
2. Value Engineering for the Crosstown Project
3. Examples of VE Workshops
(i) SRT Conversion(ii) Station Box Length(iii) Tunnel Design
4. Questions
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11/15/11 Application of VE - The Crosstown Project4 – Questions
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Questions
Contact: Rick ThompsonChief Project Manager – SRT/YardsToronto Transit CommissionTransit Expansion DepartmentTel: 416-397-4870e-mail: [email protected]