10/18/2010. Today s presentation will focus on what the construction engineer can do to help deliver a successful bridge project

Transcription

1 Field Construction Engineering Aspects of Bridge Construction Virginia Tech Construction Engineering Conference Thomas DeHaven, P.E. Executive Vice President - Figg Bridge Inspection, Inc. October 1, 2010 Creating Bridges As Art RAIL BRIDGES ARCHES CABLE STAYED BRIDGES URBAN BRIDGES ENVIRONMENTAL BRIDGES LONG BRIDGES OVER WATER LONG SPAN BRIDGES Today s presentation will focus on what the construction engineer can do to help deliver a successful bridge project 1

2 Creating Bridges As Art Two Types of Relationships Work for Owner Design/Bid/Build Work for Contractor Design/Build DELAWARE VIRGINIA MINNESOTA NEW YORK Work for Owner Design/Bid/Build C&D Canal Bridge Delaware Smart Road Bridge Virginia Varina-Enon Bridge Virginia C&D Canal Bridge, Delaware Main Span 2

3 C&D Canal Bridge Delaware Assistant Resident Engineer Office Engineer 3 Field engineers at the site 2 Field engineers at the casting facility 230 miles away Casting Yard Inspectors Field Construction Engineering Anticipate issues and solve them before they impact the project Monitor all aspects of geometry control Review contractor submittals Monitor stressing of all PT including cable-stays (2 million pounds of force!) C&D Canal Bridge, Delaware Precast concrete delta frames to reduce cost and shorten the construction schedule. 3

4 Pick Weights Weight of equipment on deck & movement of loads Stressing Forces for vertical post-tensioning Precast Piers Step by step operations to assemble a 100 tall pier in a day Cantilever Construction Balance loads during each step of operation Support conditions and rendundancy Place pier segment first Delivery and support of each segment C&D Canal Street Bridge, Delaware Span-by-span erection Weight of equipment on cantilever with geometry control and stay stressing Keep ships moving at all times C&D Canal Bridge, Delaware Construction Engineering examines ways to build over navigable waterways 4

5 C&D Canal Bridge, Delaware Opened in Design Awards 135 Max 472 Smart Road Bridge, Blacksburg, Virginia Concrete segmental variable depth bridge Balanced cantilever construction Smart Road Bridge, Virginia Native materials along with flowing shapes create functional sculpture 5

6 Out of balance superstructure load is taken in the pier Smart Road Bridge, Virginia Balanced Cantilever Construction Geometry control engineered to connect cantilevers accurately Smart Road Bridge, Virginia Balanced Cantilever Construction Smart Road Bridge, Virginia Geometry Control Critical 6

7 Smart Road Bridge, Virginia Completed in Design Awards Work for Contractor Design/Build I-35W Bridge Minnesota Penobscot Narrows Bridge Maine JFK AirTrain New York I-35W Bridge Minneapolis, Minnesota 504 Ft. Main Span 7

8 I-35W Bridge Minneapolis, Minnesota Opened Sept. 18, a.m. Design/Build in 11 months Flatiron/Manson Joint Venture 10 lane Interstate over the Mississippi River FIGG Led the Engineering Team and managed the local consultants Construction engineering included casting procedure, erection analysis & quality insurance inspection Minnesota Workers Built This Bridge The bridge design relied heavily on Minnesota workers and resources Equivalent of 400 full-time employees (vast majority local) Local subcontractors, local materials A Strategy for Safety and Speed 2-3 shifts day and night, including all holidays except Christmas Day Zero lost time incidents 8

9 Curing procedures for cold weather Formwork is field engineered Pier Construction February 15, 2008 Casting yard on south approach roadway January 27, 2008 Long Line Precasting Working from previous segments move bulkhead forward Place rebar cage and place concrete for bottom slab and webs Field engineering includes inspection of reinforcing and posttensioning for quality assurance 9

10 Spans Over Land Completed May 31, 2008 Precast Segment Erection 1st precast cantilever segment - May 25, 2008 Last Segment July 10, precast segments were erected in 45 days 10

11 Vibrating Wire Strain Gauge with Temperature Reading Linear Potentiometer Accelerometer Chloride Penetration Sensor Fiber Optic Cables 323 Sensors Triggers bridge's anti-icing system Real-time data will assist with managing operations Fiber optic cables collect data over longer lengths to determine deformations and correlate other sensors Partnership between Mn/DOT, FHWA, University of Minnesota A Smart Bridge Sensors for Structural Behavior I-35W Bridge Minneapolis, Minnesota Three-dimensional integrated drawings, like this one, were color coded to indicate the exact location of such elements and simplify construction. I-35W Bridge Minneapolis, Minnesota Open September 18, am 11

12 AirTrain JFK, New York Port Authority New York/New Jersey 9 Miles JFK AirTrain, New York Design/Build with Koch Skanska, Slattery Skanska, Bayshore and STV $1.2 Billion total, $100 M Bridges Longest Precast Segmental Bridge in the U.S. - 9 Miles, 461 Spans 5,408 Precast Segments Completed August 2001 (21 months - almost 2 months ahead of schedule) AirTrain JFK, New York Van Wyke Expressway - 160,000 vehicles per day 12

13 AirTrain JFK, New York Completed 12,144 in 11 Months within 8 Median of Congested Van Wyck Expressway 4 Sets of Erection trusses Every Week AirTrain JFK, New York AirTrain JFK, New York Create median for elevated structure in existing right-of-way

14 Equipment designed like a kit-of-parts and color coded for ease of use AirTrain JFK, New York Construction engineering included design of erection equipment AirTrain JFK, New York Precise precast geometry control at the site ensured exact alignment AirTrain JFK, New York Pre-engineering segment placement saved valuable time 14

15 AirTrain JFK, New York Winner of 13 Design Awards Qualities of a successful construction engineer Common Sense Good communication skills Flexible, team player Focused on common goals Proactive Schedule driven Quality conscious Quick thinker, creative The New I-35W Bridge book The full story of construction and field construction engineering All conference participants will receive a copy 15

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