Aircraft bridge
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Aircraft bridges, including taxiway bridges and runway bridges, bring aircraft traffic over motorways, railways, and waterways.
Construction[edit]
Aircraft bridges must be designed to support the heaviest aircraft that may cross them, or that will cross them in the future. In 1963, a taxiway bridge at Chicago O'Hare Airport, one of the busiest airports in the world, was planned to handle future aircraft weighing 365,000 pounds (166,000 kg), but aircraft weights doubled within two years of its construction.[1] Currently, the largest passenger aircraft in the world, the Airbus A380, has a maximum take-off weight (MTOW) of 575 t (1,268,000 lb).
The largest Boeing planes, i.e. the current "Project Ozark" versions of the Boeing 747-8, are approaching MTOW of greater than 1,000,000 lb (450,000 kg). Aircraft bridges must be designed for the substantial forces exerted by aircraft braking, affecting the lateral load in substructure design.[2] Braking force of 70 percent of the live load is assumed in two recent taxiway bridge designs.[2][3] And "deck design is more apt to be controlled by punching shear than flexure due to the heavy wheel loads."[2]
Taxiway bridges are unusually wide relative to their length, and aircraft loading cannot be assumed to be distributed evenly to a bridge superstructure's web, so different modeling is required in these bridges' structural design.[4]: 2–3 In cold climates, provisions for anti-icing must be made. In the U.S., regulations of the Federal Aviation Administration must be met.[2][5] And there are various other differences versus typical bridges covered by AASHTO standards.[6]
A major issue is that closing an airport for construction even temporarily is impossible.
Major alternatives considered for construction of a taxiway bridge in 2008 were:
- use of precast, prestressed concrete I-girders
- use of precast, prestressed concrete box girders
- use of steel girders
- cast-in-place, post-tensioned concrete box girder bridge.[2]
Finite Element Analysis has been advocated for, or applied in, taxiway bridge design since at least 1963.[7]
[edit]
 | This section needs additional citations for verification. (March 2021) |
Taxiway bridges and runway bridges are bridges at airports to bring airplane taxiways and runways across motorways, railroads, or waterways. A taxiway bridge must be designed to carry the weight of the maximum size airplanes crossing and perhaps stopping directly upon it. A runway bridge is similar but may have different stresses. Alternatively, a motorway may be brought by tunnel underneath one or more runways and taxiways.
Examples include:
- Part of the taxiway and one runway of Allegheny County Airport in Pittsburgh, Pennsylvania is built on a bridge over Pennsylvania Route 885 and two sets of tracks of the Union Railroad (Pittsburgh).
- At Amsterdam Schiphol Airport, the 650-metre (2,130 ft) Schiphol tunnel takes the A4 motorway underneath an airplane runway and two taxiways. In 2003, a sixth runway was added at quite some distance west of the rest of airport, with use of two connecting taxiway bridges crossing the A5 motorway and the Main Canal, respectively.
- Athens International Airport has two taxiways running on two bridges over the 62 road.
- Five taxiway bridges, Beijing Capital Airport.[8]
- Chung Cheung Road and South Runway Road in Chek Lap Kok.
- Eastern Vehicular Tunnel in Chek Lap Kok.[9]
- 1967-built steel girder taxiway bridge, Chicago O'Hare International Airport[10] In 1963, the weight thought to be necessary was 365,000 pounds (166,000 kg) for the 1967 built bridge. In 1969, aircraft weights had doubled. It was a 4-span welded steel girder bridge with a concrete deck, 226 feet (69 m) long, 125 feet (38 m) wide, bridge.[1] Maximum stress for the bridge was found to occur when an aircraft was 6 feet off the centerline.[11]
- The Copenhagen Airport has one runway and one taxiway running over the Denmark 221 road.
- Düsseldorf International Airport has the approach end of runway 23L and the last taxiway out of the same runway 05R above a railway line. The Düsseldorf Airport Station offers a very good view of passing aircraft.
- Fort Lauderdale-Hollywood International Airport has US Route 1 and an active railroad running under a runway and taxiway.[12]
- Fu Hsing North Road [zh-tw] in Taipei.
- Haneda Airport's runway 04/22 over Bayshore Route (Shuto Expressway); runway 16R/34L over Tokyo Metropolitan Route 311, Tokyo Monorail and Keikyu Airport Line; two taxiway bridges to runway 05/23 (D runway).
- Hartsfield-Jackson International Airport in Atlanta has a runway and taxiway going over Interstate 285.[12] (and see Engineering News and American Contract Journal?)
- Heathrow Airports main entranceway to Tunnel Road East runs under a runway and two taxiways.[12]
- HKIA APM between the main Terminal One and the Midfield Concourse.[13]
- Hua Hin Airport's runway crossed over Phet Kasem Road (Thailand Route 4) and Southern Railway Line.
- Indira Gandhi International Airport in Delhi operates two elevated taxiways.[14]
- At Indianapolis International Airport, a taxiway bridge was planned to connect a future fourth runway across the Interstate 70. During 2002-04, the Indiana Department of Transportation realigned the I-70 to accommodate this.
- John Glenn Columbus International Airport in Columbus, Ohio has a $10.5 million called Port Columbus Airport Crossover Taxiway.[4]
- Kai Tak Taxiway Bridge No. 3, a fast-track design-and-build contract awarded in 1993, at Hong Kong's Kai Tak Airport, which closed in 1998.[15] It is now repurposed as a road connecting Kai Tak Cruise Terminal and Shing Fung Road and Shing Cheung Road, which is now named Kai Tak Bridge.[12]
- Kai Tak Airport's northwestern end of first-generation of 13/31 runway, across Choi Hung Road (then part of Clear Water Bay Road) and Kai Tak Nullah.[16][17][18]
- Kai Tak Nullah has several bridges across to the northeast apron.[19][20]
- Kai Tak Tunnel in New Kowloon.
- At Los Angeles International Airport, a tunnel was completed in 1953 allowing Sepulveda Boulevard to revert to straight and pass beneath the two runways; it was the first tunnel of its kind.[21]
- At Manchester Airport in the United Kingdom, the A538 road runs in a pair of twin-bore tunnels underneath the southern ends of both runways.
- Macau International Airport off Taipa has taxiways.
- B Runway (16L/34R) of Narita Airport over Chiba Prefectural Road and Ibaraki Prefectural Road Route 44.
- Oakland International Airport has an underpass for Ron Cowan Parkway below a taxiway connecting the commercial runways to the general aviation North Field.[22]
- The Orlando International Airport authority, planning for a future high-speed rail line, invested in extra length for its taxiway bridges over its southern airport access road.
- Taxiway bridge over Interstate 73, Piedmont Triad International Airport in Greensboro, North Carolina.[3]
- Sandane, Trondheim and Tromsø airports in Norway have such bridges.
- S. 188th Street runs under a runway and a taxiway of Seattle-Tacoma International Airport.[12]
- The Singapore Changi Airport has two taxiway bridges spanning Airport Boulevard. These bridges required shields installed on either side to protect the road from the jet blast. Planning for it since the 1990s, the airport spent $60 million in total in modifications to support the Airbus A380.
- $35 million Taxiway Sierra Underpass reconstruction at Sky Harbor International Airport in Phoenix, Arizona included a $13 million five-span, cast-in-place, post-tensioned concrete box girder bridge. The airport also has the Taxiway Tango Underpass.[2][23]
- The Soekarno–Hatta International Airport has two taxiway bridges located in the southwest corner of the airport connecting the north and the south runway and a third taxiway bridge located in the northeast corner was under construction, scheduled to have finished in 2018.[24]
- The third runway of the Stockholm Arlanda Airport is reached from the main terminal area by taxiway bridges constructed to be able to handle the heaviest and largest airplanes in traffic.
- Taxiway B Bridge, Tampa International Airport.[25]
References[edit]
- ^ a b O.C. Guedelhoefer; J.R. Janney (1980). W.R. Schriever (ed.). Evaluation of Performance by Full-Scale Testing. American Society for Testing and Materials. pp. 17–19. ISBN 9780803103689. (book title is Full-Scale Load Testing of Structures)
- ^ a b c d e f Ted Bush; Kent Bormann; Rob Turton (Spring 2008). "Airport Bridges Take Off" (PDF). Aspire. Retrieved July 31, 2016.
- ^ a b Shane Johnson; Tom Morrison (April 10, 2015). "Design and Construction of Micropiles Supporting Taxiway Bridge" (PDF).
- ^ a b Kevin M. Gorak; Troy D. Jessop (Winter 2009). "A New Welcome at the Port Columbus International Airport" (PDF). Aspire: 34–37. Retrieved 17 May 2013. (with 4 pages of additional photos published in the web version)
- ^ "Advisory Circular AC 150/5300-13A" (PDF). Federal Aviation Administration. May 1, 2012.
- ^ Anthony N. Mavrogiannis, of Airport Consultants Council, Review Comments on Advisory Circular 150/5300-13, Airport Design Archived 2013-10-21 at the Wayback Machine, see esp. p.3.
- ^ Alan R. Jefts (1983). Finite Element Analysis of a Taxiway Bridge. American Society of Civil Engineers. ISBN 9780872623514. in book Proceedings of the Eighth Conference on Electronic Computation
- ^ Sun Rongmei; Zhang Xianmin. "Dynamic Analysis of the Taxiway Bridge Under Aircraft Moving Load".
- ^ "Expansion of Hong Kong International Airport into a Three-Runway System". Retrieved 26 March 2023.
- ^ Corrosion Investigation Study of Reinforcing Steel Taxiway Bridge and Spiral Ramps at Chicago-O'Hare International Airport. 1982.
- ^ [1] Airport World 1973, vol 6, pages 36-37.
- ^ a b c d e Google Maps, accessed July 2016
- ^ "Hong Kong International Airport splashes out HK$5 billion on a new midfield... Concourse". April 2016.
- ^ "India's first: Elevated taxiway for aircraft at Delhi airport from September". The Times of India. 2023-04-24. ISSN 0971-8257. Retrieved 2024-04-07.
- ^ Anthony Walker (September 1995). Hong Kong: The Contractors' Experience. p. 89. ISBN 9789622094000.
- ^ "Odyssey Books & Guides". Retrieved 26 March 2023.
- ^ "NW extension to Runway 13 at Kai Tak [c.1951- ] | Gwulo". gwulo.com. Retrieved 26 March 2023.
- ^ "Photos of NW extension to Runway 13 at Kai Tak [c.1951- ] | Gwulo". gwulo.com. Retrieved 26 March 2023.
- ^ "Exhibition of archival holdings on Kai Tak Airport (with photos)". www.info.gov.hk. Retrieved 26 March 2023.
- ^ "Kai-tak-Airport Image". Retrieved 26 March 2023.
- ^ LAX airport diagram, 1956 shows runways 25 and 26 crossing the line of Sepulveda Boulevard (although boulevard is not indicated).
- ^ "CASE STUDY REPORT: OAKLAND INTERNATIONAL AIRPORT ROADWAY PROJECT" (PDF). Mineta Transportation Institute. Retrieved 2021-01-12.
- ^ David A. Burrows (October 2013). "Bridges for Planes, Trains, but not Automobiles". Structure.
- ^ Media, Kompas Cyber (10 February 2017). "Bandara Soekarno-Hatta Bangun "East Cross Taxiway" - Kompas.com". Retrieved 18 October 2018.
- ^ "Tampa International Airport - Taxiway B Bridge Design-Build. Tampa, Florida". Finley Engineering Group. Archived from the original on 2016-08-27. Retrieved 2016-07-19.
External links[edit]
Media related to Aircraft bridges at Wikimedia Commons