02 tsl from tender until rfc by pablo arecco

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Challenge the future

Third Set of Locks: From Conceptual

Design until RFC Design Pablo Arecco

PIANC YP-Com Chairman / MWH Global

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From 2007, the story keeps going…

• Prequalification period: 4 months.

• Tender Design: 14 months from 2008.

Design

& Build

US$ 3,221,631,384.00

Best technical proposal

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Design of the Third Set of Locks

MWH - Chicago

IV-Infra - Rotterdam Netherlands

Panama

MWH - Buenos Aires

Tetratech - Bellevue

Sembenelli - Milano, Italy

CICP Design Integration Office and Design Centers

Design phases: Preliminary, Intermediate, Final, Release for Construction,

Optimization & As Built (Engineering services during construction).

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Design of the Third Set of Locks

• Hydraulic

• Geotechnical

• Seismic

• Lock Heads & Rolling Gates / Culvert Valves

• Mechanical / Electrical / I & C

• Buildings (by Others)

• Site Development & Infrastructure

Engineering Discipline Interfaces

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Components of each new Lock Complex Three Lock Chambers and four Lock Heads in each site

Upper Chamber

Middle Chamber

Lower Chamber

Lock Head 4

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Numerical & Physical models

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Numerical & Physical models

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Atlantic & Pacific Locks

• Use of existing 1939 excavations for New Locks

• Geology (Sandstone vs. Basalt)

• Excavation, slope protection & rock restitution

• Availability of concrete aggregate at Atlantic

• Seismic criteria / Fault zones

• Lock floor slabs

• Borinquen dams / Approach channels

Major differences

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Lock Head

Lock Walls with central connection

Typical Lock Walls

Lock chamber components For each type a structural model was identified for the design

23 monoliths per side per chamber

7 types of structural Lock Walls

Several loads combinations

Crossunder

Chamber Conduit

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Lock Chamber monolith walls Pacific & Atlantic Lock Wall monoliths are different

August 2012

Final concrete volumes: Lock walls ≈ 2.100.000 m3

Lock heads ≈ 1.200.000 m3

Lock Wall Typical

Monolith

up to 350

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Finite Elements Models with Abaqus®

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Rock Foundation

(Gatún Rock)

Rolling gates (Steel)

Backfill (Gatún Rockfill)

Lock Walls (Concrete)

Lock Walls (Concrete) Lock Head

Large Recess (Concrete)

Lock Head Small

Recess (Concrete)

Lock Head Slab

(Concrete)


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• No service disruption

• Reparable damage

• Structure essentially elastic

Level I

475 years

• No collapse

• Reparable damage

• Limited non linear behavior

Level II

950 years

Lock structures - Seismic criteria Earthquake level & performance criteria

ATL 0,33g

PAC 0,52g

ATL 0,42g

PAC 0,72g

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Final design quantities reduction

maintaining same Design Req.:

• Concrete and excavation of over

10% compared to tender

• Reduction in reinforcement of 40%

(around 17 Eiffel Towers)

Concrete reinforcement Weight 190,000 tonnes or 26 Eiffel Towers

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Design Facts & Figures Total for Atlantic and Pacific

• The MWH-led team peaked at over Equivalent 300 Full Time Staff

working in 6 design offices on 3 continents.

• 9,500 Design Drawings (Atlantic & Pacific Total)

• 13,000 Concrete Lift Shop Drawings Reviewed

• 26,000 Reinforcement Shop Drawings Reviewed

• 50 Quality Audits (33 Internal, 17 External – GUPC, ACP)

• Design 95% Complete, 88.5% Design Packages Submitted

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THIS IS THE

EFFORT OF A

HUGE TEAM!

02 tsl from tender until rfc by pablo arecco

Design

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