|
Rapid Bridge Replacement
Rapid bridge replacement or accelerated bridge construction (ABC) is a technique that allows bridges to be replaced with minimum disruption to traffic. The replacement bridge is constructed on a site near the bridge to be replaced. When it is completed, the old bridge is cut away and removed using self-propelled modular transporters (SPMTs). Then the SPMTs lift the new bridge, transfer it to the work site and put it in place. Often the highway or railroad carried by the bridge is closed for just one weekend. Conventional techniques typically replace half a bridge at a time, with all highway traffic redirected under the other bridge half, often for a year or more, while construction progresses. Accelerated bridge construction (ABC) alternatives consist of ABC components and ABC techniques. Components can be categorized into prefabricated bridge elements (e.g. beams, bridge decks, footings, columns, pier caps, abutments etc.) or prefabricated bridge systems (e.g. bridge modules with s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thermal Lance
A thermal lance, thermic lance, oxygen lance, or burning bar is a tool that heats and melts steel in the presence of pressurized oxygen to create very high temperatures for cutting. It consists of a long steel tube packed with alloy steel rods, which serve as fuel; these are sometimes mixed with aluminum rods to increase the heat output. Operation One end of the tube is placed in a holder and oxygen is fed through the tube. The far end of the tube is pre-heated and lit by an oxyacetylene torch. An intense stream of burning steel is produced at the working end and can be used to cut rapidly through thick materials, including steel and concrete Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most wi .... The tube is consumed by the process within a few minutes. Applications Often used as a h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Self-propelled Modular Transporter , a model for studying the motion of swarms
{{Disambiguation ...
Self-propelled may refer to * Human-powered transport, humans moving themselves (and their cargo) via their own muscle energy * Machines that power their own movement: ** Automobile (from ''auto-'' + ''mobile'', "self-moving") ** Locomotive (from ''loco-'' + ''motive'', "moving from its current place") ** Multiple units, self-propelled train carriages ** Self-propelled artillery *** Self-propelled gun *** Self-propelled anti-aircraft weapon *** Tank destroyer, a self-propelled anti-tank gun *** Mortar carrier, a self-propelled mortar ** Self-propelled modular transporter ** Leonardo's self-propelled cart ** Self-propelled barge T-36 * Self-propelled particles Self-propelled particles (SPP), also referred to as self-driven particles, are terms used by physicists to describe autonomous agents, which convert energy from the environment into directed or persistent motion. Natural systems which have insp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Highway Administration
The Federal Highway Administration (FHWA) is a division of the United States Department of Transportation that specializes in highway transportation. The agency's major activities are grouped into two programs, the Federal-aid Highway Program and the Federal Lands Highway Program. Its role had previously been performed by the Office of Road Inquiry, Office of Public Roads and the Bureau of Public Roads. History Background The organization has several predecessor organizations and complicated history. The Office of Road Inquiry (ORI) was founded in 1893. In 1905, that organization's name was changed to the Office of Public Roads (OPR) which became a division of the United States Department of Agriculture. The name was changed again to the Bureau of Public Roads in 1915 and to the Public Roads Administration (PRA) in 1939. It was then shifted to the Federal Works Agency which was abolished in 1949 when its name reverted to Bureau of Public Roads under the Department of Commerce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US Department Of Transportation
The United States Department of Transportation (USDOT or DOT) is one of the executive departments of the U.S. federal government. It is headed by the secretary of transportation, who reports directly to the President of the United States and is a member of the president's Cabinet. The department's mission is "to develop and coordinate policies that will provide an efficient and economical national transportation system, with due regard for need, the environment, and the national defense." History Prior to the creation of the Department of Transportation, its functions were administered by the under secretary of commerce for transportation. In 1965, Najeeb Halaby, administrator of the Federal Aviation Agency (predecessor to the Federal Aviation Administration, FAA), suggested to President Lyndon B. Johnson that transportation be elevated to a cabinet-level post, and that the FAA be folded into the DOT. It was established by Congress in the Department of Transportation Act ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Accelerated Bridge Construction
Rapid bridge replacement or accelerated bridge construction (ABC) is a technique that allows bridges to be replaced with minimum disruption to traffic. The replacement bridge is constructed on a site near the bridge to be replaced. When it is completed, the old bridge is cut away and removed using self-propelled modular transporters (SPMTs). Then the SPMTs lift the new bridge, transfer it to the work site and put it in place. Often the highway or railroad carried by the bridge is closed for just one weekend. Conventional techniques typically replace half a bridge at a time, with all highway traffic redirected under the other bridge half, often for a year or more, while construction progresses. Accelerated bridge construction (ABC) alternatives consist of ABC components and ABC techniques. Components can be categorized into prefabricated bridge elements (e.g. beams, bridge decks, footings, columns, pier caps, abutments etc.) or prefabricated bridge systems (e.g. bridge modules with s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transport (journal)
Transport (in British English), or transportation (in American English), is the intentional movement of humans, animals, and goods from one location to another. Modes of transport include air, land (rail and road), water, cable, pipeline, and space. The field can be divided into infrastructure, vehicles, and operations. Transport enables human trade, which is essential for the development of civilizations. Transport infrastructure consists of both fixed installations, including roads, railways, airways, waterways, canals, and pipelines, and terminals such as airports, railway stations, bus stations, warehouses, trucking terminals, refueling depots (including fueling docks and fuel stations), and seaports. Terminals may be used both for interchange of passengers and cargo and for maintenance. Means of transport are any of the different kinds of transport facilities used to carry people or cargo. They may include vehicles, riding animals, and pack animals. Vehicles may incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interstate 93
Interstate 93 (I-93) is an Interstate Highway in the New England states of Massachusetts, New Hampshire, and Vermont in the United States. Spanning approximately along a north–south axis, it is one of three primary Interstate Highways located entirely within New England; the other two are I-89 and I-91. The largest cities along the route are Boston, Massachusetts, and Manchester, New Hampshire; it also travels through the New Hampshire state capital of Concord. I-93 begins at an interchange with I-95, US Route 1 (US 1) and Route 128 in Canton, Massachusetts. It travels concurrently with US 1 beginning in Canton, and, with Route 3 beginning at the Braintree Split on the Braintree– Quincy city line, through the Central Artery in Downtown Boston before each route splits off beyond the Leonard P. Zakim Bunker Hill Memorial Bridge. The portion of highway between the Braintree Split and the Central Artery is named the "Southeast Expressway", w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''the Times'', ''NYT'', or the Gray Lady) is a daily newspaper based in New York City with a worldwide readership reported in 2020 to comprise a declining 840,000 paid print subscribers, and a growing 6 million paid digital subscribers. It also is a producer of popular podcasts such as '' The Daily''. Founded in 1851 by Henry Jarvis Raymond and George Jones, it was initially published by Raymond, Jones & Company. The ''Times'' has won 132 Pulitzer Prizes, the most of any newspaper, and has long been regarded as a national " newspaper of record". For print it is ranked 18th in the world by circulation and 3rd in the U.S. The paper is owned by the New York Times Company, which is publicly traded. It has been governed by the Sulzberger family since 1896, through a dual-class share structure after its shares became publicly traded. A. G. Sulzberger, the paper's publisher and the company's chairman, is the fifth generation of the family to head the pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maine Route 103 York River Bridge, NEXT Beams
Maine () is a U.S. state, state in the New England and Northeastern United States, Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Provinces and territories of Canada, Canadian provinces of New Brunswick and Quebec to the northeast and northwest, respectively. The largest state by total area in New England, Maine is the List of U.S. states and territories by area, 12th-smallest by area, the List of U.S. states and territories by population, 9th-least populous, the List of U.S. states by population density, 13th-least densely populated, and the most rural of the List of states and territories of the United States, 50 U.S. states. It is also the northeastern United States, northeasternmost among the contiguous United States, the northernmost state east of the Great Lakes, the only state whose name consists of a single syllable, and the only state to border exactly one other U.S. state. Approximately half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double-tee
A double tee or double-T beam is a load-bearing structure that resembles two T-beams connected to each other side by side. The strong bond of the flange (horizontal section) and the two webs (vertical members, also known as stems) creates a structure that is capable of withstanding high loads while having a long span. The typical sizes of double tees are up to for flange width, up to for web depth, and up to or more for span length. Double tees are pre-manufactured from prestressed concrete which allows construction time to be shortened. History The developments of double tee were started in the 1950s by two independent initiatives, one by Leap Associates founded by Harry Edwards in Florida, and the other by Prestressed Concrete of Colorado. They designed the wings to expand the structural channel in order to cover more area at a lower cost. In 1951, Harry Edwards and Paul Zia designed a wide prestressed double tee section. Non-prestressed double tees were constructed in Miami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maine State Route 103
State Route 103 (SR 103) is a long state highway in extreme southern Maine. The route is signed east–west, but forms a half-loop, with most of its western segment running strongly southeast slightly inland of the Piscataqua River and the state border with New Hampshire, its central skirting the Piscataqua generally easterly, and its eastern strongly northeast slightly inland from the Atlantic Ocean. The route piggybacks on different roads with many turns throughout its length. Route description SR 103 begins in the west at an intersection with SR 236 (which is itself a former alignment of SR 103 there) west of Eliot, near its intersection with SR 101 just southwest of the border between South Berwick and Dover, New Hampshire. For its first mile SR 103 heads south-southwest, until crosses Sturgeon Creek, a tidal inlet of the Piscataqua River, the state border with New Hampshire. There it turns southeast to parallel the river, meandering slightly inland southeast t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.png "Click for more on -> The New York Times")
