Accelerated construction pratices, Clifford Schexnayder

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Corporación de Desarrollo Tecnológico

Corporación de Desarrollo Tecnológico

Seminario técnicas de construcción acelerada: mejorando productividad

Clifford Schexnayder

www.cdt.cl 25 noviembre 2010

“Acelerated construction practices”

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Accelerated

Construction Practices

Cliff Schexnayder Cliff Schexnayder

Eminent Scholar Emeritus Arizona State University

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Cliff Schexnayder

Civil Engineer

• Construction Co. Chief engineer • Civil engineering professor

• Consultant – • Consultant –

Panama Canal 3rd Lane

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TEAM

Steven DeWitt George Raymond Oklahoma DOT Chris Schneider FHWA, HQ 3 Thomas Bohuslav

Texas DOT Richard Sheffield_{Mississippi DOT}

Brian Blanchard Florida DOT Steven DeWitt NC Turnpike Authority Clifford Schexnayder

Arizona State University

Stuart Anderson Texas A&M

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Los proyectos Visitaron

I-65/59 Bridges, Birmingham I-880 MacArthur Bridge

YBI Viaduct Bay Bridge

I-40 Mojave Russian River Bridge 4 Accelerated Bridge Construction, Utah

I-10 Houston Escambia Bay Bridge, I-10 (Emergency &

Rebuild), Pensacola Duval St. Bridge & SR9A/I-295, Jacksonville I-40 Mojave

Desert

I-15 Repave

I -5 Tunnel Fire Repair

Queen Isabella Causeway

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Areas de Foco de aceleración

Situación de emergencia

Aceleración de

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Aceleración de

proyecta/programa

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Aceleración de emergencia

Projects accelerated for

emergency situations have very compressed schedules yet they must be delivered following

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must be delivered following

sound design, construction, and management processes.

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Hurricane Ivan,

Pensacola, Florida

Night of Sept. 15/16, 2004

I-10 Puente

7

Bahía de Escambia

I-10 Puente

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I-10 Bridge

4-km long bridge

over shallow bay

Critical east-west Critical east-west access across

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Westbound bridge

- 12 spans destroyed - 19 spans misaligned - 7 bents replaced

Eastbound bridge

Bridge Damage

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Eastbound bridge

- 51 spans destroyed - 33 spans misaligned

- 58 Acrow spans installed - 25 bents replaced

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Date 2004 Event

17 Sept. 9:00 a.m. Pre-proposal meeting, Chipley, FL

17 Sept. 1:00 p.m. Questions and Answer meeting

Hurricane, Night of Sept. 15/16

meeting

17 Sept. 4:00 p.m. Price Proposals

17 Sept. 4:00 p.m. Public Price Proposal open 17 Sept. 5:00 p.m. Anticipated Execution Date 17 Sept. 5:00 p.m. Notice to Proceed

11 Nov. Phase 1 complete, Westbound Bridge 16 Dec. Contract Completion

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Escambia

Bay Bridge,

contract

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Scope of Services

Design new pile bents Phase 1 (WB)

Design new pile bents Phase 2 (EB)

Design Acrow supports for Phase 2

Approach Slab/Embankment Replacement (East End Bent)

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New pile bents Phase 1

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All designs had to conform to the available materials.

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Escambia Bay Bridge

Looking West

Acrow

prefabricated steel bridge system

system

All designs had to conform to the available materials.

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No support facilities – restaurants,

electricity, communication

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Keys to Success

Delegated Contract

Award and Execution

to Local Office

–

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to Local Office

–

This fast tracked the

signing of a contract.

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Keys to Success

Basic Scope Only –

Contractors need latitude about means and methods on these types of projects.

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on these types of projects.

Work Concurrent with

Design – The design has to utilize available materials.

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Keys to Success

Availability of Materials

–

Hard to find materials during the early phase of disaster

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the early phase of disaster work.

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Birmingham, Alabama

Saturday morning January 5, 2002

I-65/I-59 Bridge after the fire I-65/I-59 Bridge after the fire

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5 Jan. Saturday morning accident 1 6 Jan. Decision a new bridge and select

five contractors.

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7 Jan. Monday Start design 3

8 Jan. Tuesday, Prelim. Plans to Contractors

4

Day

I-65/I-59 Bridge

Contractors

14 Jan. Monday 1:00 p.m., Pre-Bid 10 16 Jan. Wednesday 10:00 a.m., bids 12 18 Jan. Friday, Notice to Proceed 14 21 Jan. Monday 12:01 a.m., Construction

begins

17

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27 Feb. 2002

Opened to traffic

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Keys to Success

Partnership – Decisions were made at the Project Level: verbal requests and approvals.

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approvals.

Mutual Trust –

Contractor/DOT/Girder Fabricator

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Keys to Success

Cooperation

– Rapid

turn around of shop

drawings.

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drawings.

Planning

– Very detailed

planning and schedule.

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I-580/880

MacArthur Maze,

Oakland

Sunday

April 29, 2007

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Day

29 Apr. Sunday, 3:41 a.m. tanker accident. 1 30 Apr. Caltrans locating steel, design. 2

1 May Clean-up, inspection 3 3 May I-580 contract advertised. 5 5 May Mandatory onsite bid conference. 7

MacArthur Maze

5 May Mandatory onsite bid conference. 7 7 May Monday, bid 10a.m., award 3:30p.m. 9 10 May Penn. steel arrives fabricator in AZ 12

11 May Begin girder fabrication 13 15 May Precast bent cap arrives at night 17 24 May Thursday, opened at 8:40 p.m. 26

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Keys to Success

Availability of Materials

–

Design to available materials.

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materials.

Team Effort

–

Located people where needed.

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Keys to Success

Incentive/Disincentive

–

The project was advertised with a $200,000 per day

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incentive/disincentive clause capped at

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Planned Acceleration

Projects can be accelerated

by careful planning of

preconstruction activities and

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preconstruction activities and

thoughtful staging of field operations

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I-15 Devore Corridor, California

Planned

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Keys to Success

Contract –

Incentive/Disincentive provisions

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Design –

Rapid-strength concrete and substituted AC base

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Keys to Success

Public Outreach –

Intensive outreach

achieved a 20-percent

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achieved a 20-percent reduction in peak-hour traffic demand

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I-10 Design Build

Replacement of Interstate 10 Bridges over Escambia Bay

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Design Build RFP

Price + Time

Technical Score

I-10 Design Build

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I-10 Design Build

Adjusted Scoring Worksheet

Tidewater/PB TEAM B TEAM C

TECHNICAL SCORE 137.5 136.2 126.6

BID PRICE $242 Million $360 Million $317 Million

CONTRACT DAYS 862 932 905 FINAL RANKINGS ₁ ₂ ₃

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Safe Distance From

Existing

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54” & 60” Cylinder Piles

• Limited Availability • Unique Equipment

Required

1,300 Tons

Required

• Increased Vibration • Possibility of Jetting

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Square Piles

• Piles Available • Conventional

Equipment

• Reduced Vibration

700 Tons

• Reduced Vibration • Less Disturbance

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Manpower Planning

100 120 140 160 180 0 20 40 60 80 100

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

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Marine Crane Usage Plan

15 20 25

Phase I Phase II _{Phase III} Phase IV

0 5 10

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31