John James Audubon Bridge (Mississippi River)
Coordinates: 30 ° 43 ′ 13 ″ N , 91 ° 21 ′ 5 ″ W.
| John James Audubon Bridge | ||
|---|---|---|
 |
||
| use |
.svg){kind=small} Louisiana Highway 10
|
|
| Crossing of | Mississippi River | |
| place | Pointe Coupee Parish and West Feliciana Parish in Louisiana | |
| construction | Cable-stayed bridge | |
| overall length | 3,661 m (3,927 m) | |
| Longest span | 482 m | |
| building-costs | 409 million US dollars | |
| opening | 2011 | |
| planner | Audubon Bridge Constructors | |
| location | ||
|
||
The John James Audubon Bridge is a cable-stayed bridge over the Mississippi River between Pointe Coupee Parish and West Feliciana Parish in the state of Louisiana to the United States . It runs four lanes of Louisiana Highway 10 and is operated by the Louisiana Department of Transportation and Development . The average traffic volume in 2015 was 3,400 vehicles per day. At 482 meters, it has the second longest span between the pylons of a cable-stayed bridge in the western hemisphere , after the Mexican Baluarte Bridge with 520 meters. It is named after the American ornithologist and draftsman John James Audubon .
history
The bridge replaced an upstream ferry service near St. Francisville , which in 2010 transferred more than 700 vehicles a day. The construction was part of the infrastructure program TIMED (Transportation Infrastructure Model for Economic Development) of the state of Louisiana . The five billion US dollar program was approved in 1989 and was originally supposed to run until 2004, but was extended several times and completion was delayed until 2016 by Hurricane Katrina and Hurricane Rita . In addition to the construction of the John James Audubon Bridge , it included including the widening of the Huey P. Long Bridge in Jefferson Parish and the highways of Louisiana to over 800 kilometers as well as the modernization and expansion of the international airport and port of New Orleans .
In April 2006, the Louisiana Department of Transportation and Development awarded the contract to Audubon Bridge Constructors , a joint venture consisting of Flatiron Construction Corp., to design the bridge including its execution ( design – build project) . , Granite Construction Company and the Parsons Transportation Group . Work began two months later and was completed in January 2012. However, the bridge was opened to traffic unscheduled in May of the previous year, as the operation of the former ferry had to be stopped prematurely due to the Mississippi flood of 2011 . The daily traffic volume of 4,000 vehicles forecast for 2012 could not be achieved at just under 2,900 and in 2015 was only 3,400 vehicles. By 2020 an increase to 6,500 and by 2040 to over 20,000 vehicles per day is expected.
description
The central element of the 3,661 m long bridge is the double-hip cable - stayed bridge (971 m) with a span of 482 m between the two H- pylons made of reinforced concrete . These have a height of 158.5 m from the lower edge of the foundation and are anchored more than 50 m deep in the river bed by means of pile foundations . For this purpose, 21 steel pipes with a diameter of 2.4 m were drilled into the ground, filled with concrete and integrated into the respective foundations. The 22 m wide roadway girder is designed as a solid steel wall girder with a 24 cm thick reinforced concrete roadway and is supported by 136 cables that are arranged on the pylons in the fan system .
The cables are of the SSI 2000 type from the Swiss manufacturer VSL International and, depending on their length, consist of 21–69 wire ropes that are combined in a polyethylene tube . The outermost and longest cables are 253 m in length. The wire ropes, which are also plastic-coated, are in turn divided into strands with a diameter of around 1.5 cm, each made up of seven steel wires.
The access roads from a large number of girder bridges connect to the cable-stayed bridge . To the west to New Roads these have a total length of 623 m and to the east of 2,067 m. The almost 25 km long construction project also included the connection to Louisiana Highway 1 and US Highway 61 , including the roads and seven other smaller bridges, with the total length of all bridge sections being 3,927 m.
See also
Web links
- Design-Build Projects - John James Audubon Bridge. Louisiana Department of Transportation and Development.
- John James Audubon Bridge. Parsons Transportation Group.
- John James Audubon Bridge, St. Francisville, LA. Flatiron Construction Corporation.
Individual evidence
- ↑ a b DOTD Expedites Emergency Opening of John James Audubon Bridge. ( Memento from May 18, 2011 on the Internet Archive ) Louisiana Department of Transportation and Development.
- ^ Louisiana TIMED Program. Center for Innovative Finance Support, Federal Highway Administration. Retrieved September 1, 2017.
- ↑ News Releases - John James Audubon Bridge. ( Memento November 1, 2016 in the Internet Archive ) Louisiana TIMED Managers ( Contract Awarded on New Mississippi River Bridge. April 4, 2006, p. 44).
- ↑ Terry L. Jones: Four years later, Audubon Bridge remains $ 409M road less traveled. The Advocate, February 24, 2015. Retrieved September 2, 2017.
- ^ Paul Fossier: Design and Construction of the John James Audubon Bridge. SASHTO ANNUAL CONFERENCE, New Orleans, August 25, 2014.
- ^ Armin G. Schemmann, Don W. Bergman, Greg Shafer: A modern marvel crosses the mighty Mississippi. In: Civil Engineering. Vol. 82, No. 9, 2012, pp. 62-67, 85 ( doi: 10.1061 / ciegag.0000417 ).
- ^ Angelle Bergeron: Built Above Wildly Erratic River Levels, Cable-Stayed Giant Rises Over the Flood. Engineering News-Record, April 14, 2010.
- ↑ VSL SSI 2000 Stay Cable System. ( Memento from September 14, 2017 in the Internet Archive ) VSL International Ltd. 2002. Retrieved September 13, 2017.
- ↑ Audubon Bridge Constructors: John James Audubon Bridge - An Elegant Design. Louisiana Transportation Engineering Conference, Aug. 8-11 February 2009.