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Through Arch Bridge
A through arch bridge, also known as a through-type arch bridge, is a bridge that is made from materials such as steel or reinforced concrete, in which the base of an arch structure is below the deck but the top rises above it. It can either be lower bearing or mid-bearing. Thus, the deck is within the arch, and cables or beams that are in tension suspend the central part of the deck from the arch. Function For a specific construction method, especially for masonry arches, the proportions of the arch remain similar no matter what the size: wider arches are thus required to be taller arches. For a semi-circular arch, the height is half of the span. Bridges across deep, narrow gorges can have their arch placed entirely beneath a flat roadway, but bridges in flatter country rise above their road approaches. A wide bridge may require an arch so tall as to become a significant obstacle and incline for the roadway. Small bridges can be hump-backed, but larger bridges such as the Old B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arch Bridge
An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its loads partially into a horizontal thrust restrained by the abutments at either side. A viaduct (a long bridge) may be made from a series of arches, although other more economical structures are typically used today. History Possibly the oldest existing arch bridge is the Mycenaean Arkadiko Bridge in Greece from about 1300 BC. The stone corbel arch bridge is still used by the local populace. The well-preserved Hellenistic Eleutherna Bridge has a triangular corbel arch. The 4th century BC Rhodes Footbridge rests on an early voussoir arch. Although true arches were already known by the Etruscans and ancient Greeks, the Romans were – as with the vault and the dome – the first to fully realize the potential of arches for bridge construction. A list of Roman bridges compiled by the engineer Colin O'Connor featur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viaduct
A viaduct is a specific type of bridge that consists of a series of arches, piers or columns supporting a long elevated railway or road. Typically a viaduct connects two points of roughly equal elevation, allowing direct overpass across a wide valley, road, river, or other low-lying terrain features and obstacles. The term ''viaduct'' is derived from the Latin ''via'' meaning "road", and ''ducere'' meaning "to lead". It is a 19th-century derivation from an analogy with ancient Roman aqueducts. Like the Roman aqueducts, many early viaducts comprised a series of arches of roughly equal length. Over land The longest in antiquity may have been the Pont Serme which crossed wide marshes in southern France. At its longest point, it measured 2,679 meters with a width of 22 meters. Viaducts are commonly used in many cities that are railroad hubs, such as Chicago, Birmingham, London and Manchester. These viaducts cross the large railroad yards that are needed for freight trains there, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennybacker Bridge
The Percy V. Pennybacker Jr. Bridge in Austin, Texas, is a through-arch bridge across Lake Austin which connects the northern and southern sections of the Loop 360 highway, also known as the "Capital of Texas Highway." The road is widely considered one of the most scenic urban drives in Texas, in large part due to this arched weathering-steel bridge and the rolling hills that flank the road. In 2001, 48,000 vehicles crossed the bridge daily. Ten years prior to this, 22,000 vehicles had crossed the bridge daily. History More commonly known as the "360 Bridge," the contract for the bridge was let in late 1979 and major structural steelwork was finished by July 1982. The bridge was dedicated officially November 29, 1982 by Austin mayor Carole McClellan and other public officials and opened for traffic December 3, 1982. The bridge is named for Percy V. Pennybacker Jr., who designed bridges for the Texas Highway Department and was a pioneer in the technology of welded structures. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Cod Canal
The Cape Cod Canal is an artificial waterway in the U.S. state of Massachusetts connecting Cape Cod Bay in the north to Buzzards Bay in the south, and is part of the Atlantic Intracoastal Waterway. The approximately canal traverses the neck of land joining Cape Cod to the state's mainland. It mostly follows tidal rivers widened to and deepened to at mean low water, shaving off the journey around the Cape for its approximately 14,000 annual users. Most of the canal is located in the town of Bourne, but its northeastern terminus is in Sandwich. Scusset Beach State Reservation lies near the canal's north entrance, and the Massachusetts Maritime Academy is near its south. A swift-running current changes direction every six hours and can reach during the receding ebb tide. The waterway is maintained by the United States Army Corps of Engineers and has no toll fees. It is spanned by the Cape Cod Canal Railroad Bridge, the Bourne Bridge, and the Sagamore Bridge. Traffic lights ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sagamore Bridge
The Sagamore Bridge in Sagamore, Massachusetts carries Route 6 and the Claire Saltonstall Bikeway across the Cape Cod Canal, connecting Cape Cod with the mainland of Massachusetts. It is the more northeastern of two automobile canal crossings, the other being the Bourne Bridge. Most traffic approaching from the north follows Massachusetts Route 3 which ends at Route 6 just north of the bridge, and the bridge provides direct expressway connections from Boston and Interstate 93. History The bridge and its sibling the Bourne Bridge were constructed beginning in 1933 by the Public Works Administration for the U.S. Army Corps of Engineers, which operates both the bridges and the canal. Both bridges carry four lanes of traffic over a main span, with a ship clearance. They opened to traffic on June 22, 1935. The design of the Sagamore and Bourne bridges was later copied in miniature for the John Greenleaf Whittier Bridge that connects I-95 from Newburyport to Amesbury, Massachusetts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bourne Bridge
The Bourne Bridge in Bourne, Massachusetts carries Route 28 across the Cape Cod Canal, connecting Cape Cod with the rest of Massachusetts. It won the American Institute of Steel Construction's Class "A" Award of Merit as the "Most Beautiful Steel Bridge" in 1934. Most traffic approaching from the west follows Massachusetts Route 25 which ends at the interchange with US 6 and Route 28 just north of the bridge. The highway provides freeway connections from Interstate 495 and Interstate 195. History The bridge and its sibling the Sagamore Bridge were constructed beginning in 1933 by the Public Works Administration for the United States Army Corps of Engineers, which operates both the bridges and the canal. Each bridge carries four lanes of traffic over a 616-foot (188 m) main span, with a 135-foot (41 m) ship clearance. Construction ended in early 1935 and the bridge opened on June 22, 1935. The approaches to the main span of the Bourne Bridge are considerably longer than those ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ahwaz White Bridge
White Bridge ( fa, پل سفید) is an arch bridge located in Ahvaz, Khuzestan, Iran, built above the Karun river The Karun ( fa, کارون, ) is the Iranian river with the highest water flow, and its only navigable river. It is long. It rises in the Zard Kuh mountains of the Bakhtiari district in the Zagros Range, receiving many tributaries, such a .... The bridge was completed on September 21, 1936 and was inaugurated on November 6, 1936. The bridge remains a symbol of the city still today. References Ahvaz Bridges in Iran Architecture in Iran Bridges completed in 1936 Suspension bridges in Iran {{Iran-bridge-struct-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Jersey
New Jersey is a state in the Mid-Atlantic and Northeastern regions of the United States. It is bordered on the north and east by the state of New York; on the east, southeast, and south by the Atlantic Ocean; on the west by the Delaware River and Pennsylvania; and on the southwest by Delaware Bay and the state of Delaware. At , New Jersey is the fifth-smallest state in land area; but with close to 9.3 million residents, it ranks 11th in population and first in population density. The state capital is Trenton, and the most populous city is Newark. With the exception of Warren County, all of the state's 21 counties lie within the combined statistical areas of New York City or Philadelphia. New Jersey was first inhabited by Native Americans for at least 2,800 years, with the Lenape being the dominant group when Europeans arrived in the early 17th century. Dutch and Swedish colonists founded the first European settlements in the state. The British later seized control o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newcastle Upon Tyne
Newcastle upon Tyne ( RP: , ), or simply Newcastle, is a city and metropolitan borough in Tyne and Wear, England. The city is located on the River Tyne's northern bank and forms the largest part of the Tyneside built-up area. Newcastle is also the most populous city of North East England. Newcastle developed around a Roman settlement called Pons Aelius and the settlement later took the name of a castle built in 1080 by William the Conqueror's eldest son, Robert Curthose. Historically, the city’s economy was dependent on its port and in particular, its status as one of the world's largest ship building and repair centres. Today, the city's economy is diverse with major economic output in science, finance, retail, education, tourism, and nightlife. Newcastle is one of the UK Core Cities, as well as part of the Eurocities network. Famous landmarks in Newcastle include the Tyne Bridge; the Swing Bridge; Newcastle Castle; St Thomas’ Church; Grainger Town including G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaotianmen Bridge
The Chaotianmen Bridge (), is a road-rail bridge over the Yangtze River in the city of Chongqing, China. The bridge, which opened on 29 April 2009, is the world's longest through arch bridge. The continuous steel truss arch bridge with tie girders has a height of from middle supports to arch top, main span of and a total length of . It carries six lanes of traffic with a pedestrian walkway on each side on the upper deck. The lower deck has 2 traffic lanes on each side with the Chongqing Metro Loop Line running down the middle.RIA 1/2007Chaotianmen Bridge – world's longest-span steel arch bridge See also * Yangtze River bridges and tunnels * List of longest arch bridge spans This list of the longest arch bridge spans ranks the world's arch bridges by the length of their main span. The length of the main span is the most common way to rank bridges as it usually correlates with the engineering complexity involved in des ... References External links * Bridges com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roads & Traffic Authority
The Roads & Traffic Authority (RTA) was an agency of the New South Wales Government responsible for major road infrastructure, licensing of drivers, and registration of motor vehicles. The RTA directly managed state roads and provided funding to local councils for regional and local roads. In addition, with assistance from the federal government, the RTA also managed the NSW national highway system. The agency was abolished in 2011 and replaced by New South Wales Roads and Maritime Services. History The Department of Main Roads (New South Wales), Department of Main Roads (DMR) was created in November 1932, and undertook works across New South Wales, including maintenance of all major roads into Sydney and programs of road reconstruction, construction, upgrading and rerouting. The DMR was also responsible for many ferries and bridges in New South Wales. In January 1989, the Department of Main Roads, Department of Motor Transport, and the Traffic Authority were amalgamated t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hell Gate Bridge
The Hell Gate Bridge, originally the New York Connecting Railroad Bridge or the East River Arch Bridge, is a steel through arch railroad bridge in New York City. Originally built for four tracks, the bridge currently carries two tracks of Amtrak's Northeast Corridor and one freight track across the Hell Gate, a strait of the East River, between Astoria in Queens and Randalls and Wards Islands in Manhattan. The arch across the Hell Gate is the largest of three bridges that form the Hell Gate railroad viaduct. An inverted bowstring truss bridge with four spans crosses the Little Hell Gate, a former strait that is now filled in, and a fixed truss bridge crosses the Bronx Kill, a strait now narrowed by fill. Together with approaches, the bridges are more than long. The designs of the Tyne Bridge in Newcastle, England and the Sydney Harbour Bridge in New South Wales, Australia were derived from the Hell Gate Bridge. History The bridge was conceived in the early 1900s to link ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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