East Side Access Outreach April 2007. Contractor Outreach – CQ031 (April 2007) Doing Business with MTACC.

East Side Access OutreachEast Side Access Outreach

April 2007

Contractor Outreach – CQ031 (April 2007)

Doing Businesswith

MTACCis a

Cooperative Owner / Project Partner

MTACC is Committed to:MTACC is Committed to:

• Pro-active Project Management

• Continual Improvement & Use of Best Practices

• Sensitivity to Construction Industry Concerns

• Overcoming Obstacles in a timely manner

How MTACC Meets the Challenge: How MTACC Meets the Challenge:

• Careful analysis of what’s going on in the industry

• Solid, accountable Program Management

• Reaching out and talking to contractors to address their issues – JUST LIKE TODAY!

Focus on Project ManagementFocus on Project Management

• Foster timely decision-making at all levels

• Increase staff training

• Conduct Constructability Reviews

• Building-in quality and safety programs

• Partnering

• Monitor budget and schedule

• Deal with utilities early and often

Making Changes – Procurement ImprovementsMaking Changes – Procurement Improvements

• Flexibility in contract strategies and terms

• Introduce the use of early completion incentives

• Considering bi-monthly payments on special projects

• Use of escalation provisions if needed

Contract IssuesContract Issues

• Negotiation of ADR Provisions

• Timely Change Order Process

• Monitoring to Make Further Improvements– Timely Progress Payment Processing

• Handling of Geotechnical Information – Use of Geotechnical Interpretive Reports

Bottom LineBottom Line

• We respect our consultants and contractors, and recognize the need to work as partners.

• Let’s continue to dialogue to further improve our business practices to meet all of our needs.

• We only succeed if we all succeed!

Procurement Strategy - Negotiated ProcurementProcurement Strategy - Negotiated Procurement

• Hybrid used at MTACC which combines the advantages of a fully designed project with the flexibility of a negotiated procurement

• RFP issued based on 100% design

• Negotiations permit owner and proposer to address specific project risks

• Translates into overall better project definition and cost savings

MTA Regional Commuter Rail SystemMTA Regional Commuter Rail System

Queens ConstructionQueens Construction

CQ031 OverviewCQ031 Overview

• Scope Summary– Four soft-ground bored tunnels, connecting Plaza

Interlocking with the LIRR Mainline and the Mid-Day Storage Yard

– Three ventilation shafts

– Approach structures and retaining walls

• Schedule– Contract Advertised 4th Quarter of 2007

– Construction Starts 1st Quarter of 2008

Elements of CQ031 Elements of CQ031

Track ATrack ATrack B/CTrack B/C

LIRR LeadLIRR Lead

Track DTrack D

Honeywell St

3939 thth St St

TBM Launch WallTBM Launch Wall

TBMTBMCut & CoverCut & Cover

(CQ028)(CQ028)

Westbound BypassWestbound Bypass

Major Construction Elements – CQ031 (1 of 2)Major Construction Elements – CQ031 (1 of 2)

• Bored Tunnels (10,500 ft)– 19’-6” ID, segmental liner

– Four Tunnels (A, B/C, D and Yard Lead)

– Ground Treatment for TBM launch, mixed face, cross passages

– Instrumentation

• Tunnel Trackwork and Tunnel Bench

• Ventilation & Emergency Exit Shafts + 2 fan power substations– Three Tunnel Emergency Exit (A, B/C, Yard Lead) & Sewer Relocation

– Track D emergency Exit

– Yard Lead Emergency Exit

• Retaining Walls– Westbound Bypass Retaining Wall

– Penn Lead Track Retaining Wall & C08 Substation Foundation

Major Construction Elements – CQ031 (2 of 2)Major Construction Elements – CQ031 (2 of 2)

• Cut and Cover Approach Structures– Yard Lead Approach Structure, S&I Access Road Relocation

– Closure of TBM reception pits A and D

• Demolition– 43rd Street Private Properties

– Remaining elements of Amtrak Substation 1A

– Sunnyside Connector Track and Transformers at Honeywell St. Bridge

• Underpinning– Honeywell Street Bridge Piers 4, 5 and 6

– 39th Street Bridge Pier 1S

– General Motors Access Bridge South Pier

– Existing 43rd Street Bridge Piers 1 through 4 and Sewer Relocation

– Harold Signal Tower

Bored TunnelsBored Tunnels

Two EPB or Slurry TBMs

Bored Tunnels - Pre-Cast Segmental LinersBored Tunnels - Pre-Cast Segmental Liners

Bored Tunnels - Section Through Launch Shaft: Rock/Soil InterfaceBored Tunnels - Section Through Launch Shaft: Rock/Soil Interface

A B/C D

Yard Lead

Bored Tunnels - Ground TreatmentBored Tunnels - Ground Treatment

Yard Lead

LaunchShaft

Bored Tunnels - Length of Tunneling Bored Tunnels - Length of Tunneling

SectionLength

TunnelLength

Track A Glacial Till 2,180 ft 2,180 ft

Track B/C Glacial Till 1,739 ft1,739 ft

Track DRock and Mixed Face 60 ft

Glacial Till 2,158 ft 2,218 ft

Yard LeadRock and Mixed Face 515 ft

4,384 ftGlacial Till 3,869 ft

10,523 ft 10,523 ft

Bored Tunnels - Instrumentation & Predicted Settlement Contours Bored Tunnels - Instrumentation & Predicted Settlement Contours

Bored Tunnels - Settlement Monitoring and LimitsBored Tunnels - Settlement Monitoring and Limits

Manual and Automated Total Station Rail MonitoringManual and Automated Total Station Rail Monitoring

Reflector

Tunnel Trackwork and Tunnel Bench - Trackwork InstallationTunnel Trackwork and Tunnel Bench - Trackwork Installation

Tunnel Trackwork – Booted Block SystemTunnel Trackwork – Booted Block System

Ventilation and Emergency Exit Shafts - Three TunnelsVentilation and Emergency Exit Shafts - Three Tunnels

Ventilation and Emergency Exit Shafts - Track DVentilation and Emergency Exit Shafts - Track D

Ventilation and Emergency Exit ShaftsVentilation and Emergency Exit Shafts

Modular Retaining Wall

Air Plenum

Upper SA Room

Fan Room

Lower SA Room

Jet Grout Invert Plug

Track D Emergency Exit at Honeywell St. (Similar to Yard Lead Emergency Exit at 39th St.)

Yard Lead Emergency Exit & Substation at 39th Street

3939thth StreetStreet BridgeBridge

Harold Access Bridge

Skillman A

SubstationSubstation

Emergency ExitEmergency Exit

Yard Lead Emergency Exit and Substation at 39th Street

Retaining Walls - Westbound Bypass and PL TrackRetaining Walls - Westbound Bypass and PL Track

Westbound Bypass Approach Structure (Rendering)

Modular Retaining Wall Section for PL Track

Cut and Cover Approach - TBM Reception Pits - By OthersCut and Cover Approach - TBM Reception Pits - By Others

Track A TBM Reception Pit

(CH053)

Track A Approach Structure

(CH053)

Track B/CTBM Eastern Limit

Track B/C Approach Structure

(CH059)

Track DTBM Reception Pit

(CH054)

Track D Approach Structure

(CH054)Harold Access Bridge

(CH053)

Cut and Cover ApproachCut and Cover Approach

CH054 – 48th St Main Line Bridge (Reloc. ML4 and

Temp. ML2)

Retaining Wall Retaining

Yard LeadApproach Structure

GM Access Bridge

Retaining Wall

Mainline Bridgesat 43rd Street (CH053)

Cut and Cover Approach - Typical Approach StructureCut and Cover Approach - Typical Approach Structure

Demolition - Private Properties on 43rd Street Demolition - Private Properties on 43rd Street

Traction Power Substation C08 at 43rd StreetTraction Power Substation C08 at 43rd Street

Yard Lead Tunnel Approach Structure

Traction Power Substation C08 – Foundations Only

Underpinning - Protection of Honeywell St. BridgeUnderpinning - Protection of Honeywell St. Bridge

Underpinning - Protection of GM Access Bridge (jet grout columns)Underpinning - Protection of GM Access Bridge (jet grout columns)

Underpinning - Yard Lead Tunnel - 43rd St Bridge Pier ModificationUnderpinning - Yard Lead Tunnel - 43rd St Bridge Pier Modification

Temp. Steel Road Plate

Mini Piles

Yard Lead

RelocatedDEP Sewer

Mini Piles

Railroad InterfacesRailroad Interfaces

• Working Arrangements with Railroads

• Flagging Support and Force Account Support

• Working within Harold Interlocking and Sunnyside Yard

• TBM Removal next to Harold Mainline and Catenary

Main Staging AreaMain Staging Area

500 ft

Key Elements (1 of 2)Key Elements (1 of 2)

• Contract Construction Interfaces

– Predecessor Contracts: CQ028, CH053

– Interfaces in Harold Interlocking and Yard A with Concurrent Contracts: CH054, CM009, CM012, CM019, Force Account.

– Successor Contracts: CQ032, CH057, CS079

– Additional Design Interfaces with: CH059, CS081

• New Technology

– Pressurized Face TBMs

– Precast Booted -Block Trackwork System.

Key Elements (2 of 2)Key Elements (2 of 2)

• Means and MethodsGenerally shown as ‘Suggested Method’ with permissible alternatives detailed in the specifications: – TBM: Pressurized Face (Slurry or EPB)

– Liner: Reinforcement designed by GEC consultant. Contractor can propose modifications to details such as left/right rings, taper, segment shape and dowels

– Ground Treatment: Jet grout or ground freezing feasible

– Ground Support for Vent Shafts: slurry walls or secant piles feasible

– Temporary Support for Yard Lead Approach Structure: Jet grout plus soldier pile and lagging suggested, slurry walls and tremie plug acceptable

– Temporary Support for Westbound Bypass. Suggested as Soldier Pile and lagging with rakers or tie-backs

– Underpinning: Various methods suggested (one per pier location)

• Instrumentation and Monitoring

• Mixed Face, Boulders and Shallow Tunneling

East Side Access Outreach April 2007. Contractor Outreach – CQ031 (April 2007) Doing Business with MTACC.

contractor outreach

mtacc slide

elements of cq031

access outreach

timely manner slide

queens construction

d yard lead tunnel slide

cq031 overview scope

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