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Bridge Scour
Bridge scour is the removal of sediment such as sand and gravel from around bridge abutments or piers. Hydrodynamic scour, caused by fast flowing water, can carve out ''scour holes'', compromising the integrity of a structure. In the United States, bridge scour is one of the three main causes of bridge failure (the others being collision and overloading). It has been estimated that 60% of all bridge failures result from scour and other hydraulic-related causes.Mark N. LandersBridge Scour Data Management Published in ''Hydraulic Engineering: Saving a Threatened Resource—In Search of Solutions: Proceedings of the Hydraulic Engineering sessions at Water Forum ’92.'' Baltimore, Maryland, August 2–6, 1992. Published by American Society of Civil Engineers. It is the most common cause of highway bridge failure in the United States, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Local Scour
Local may refer to: Geography and transportation * Local (train), a train serving local traffic demand * Local, Missouri, a community in the United States * Local government, a form of public administration, usually the lowest tier of administration * Local news, coverage of events in a local context which would not normally be of interest to those of other localities * Local union, a locally based trade union organization which forms part of a larger union Arts, entertainment, and media * Local (comics), ''Local'' (comics), a limited series comic book by Brian Wood and Ryan Kelly * Local (novel), ''Local'' (novel), a 2001 novel by Jaideep Varma * Local TV LLC, an American television broadcasting company * Locast, a non-profit streaming service offering local, over-the-air television * The Local (film), ''The Local'' (film), a 2008 action-drama film * ''The Local'', English-language news websites in several European countries Computing * .local, a network address component * L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engineering
Engineering is the use of scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. The discipline of engineering encompasses a broad range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, and types of application. See glossary of engineering. The term ''engineering'' is derived from the Latin ''ingenium'', meaning "cleverness" and ''ingeniare'', meaning "to contrive, devise". Definition The American Engineers' Council for Professional Development (ECPD, the predecessor of ABET) has defined "engineering" as: The creative application of scientific principles to design or develop structures, machines, apparatus, or manufacturing processes, or works utilizing them singly or in combination; or to construct or operate the same with full cognizance of their design; or to forecast their behavior under sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armor (hydrology)
In hydrology and geography, armor is the association of surface pebbles, rocks or boulders with stream beds or beaches. Most commonly hydrological armor occurs naturally; however, a man-made form is usually called riprap, when shorelines or stream banks are fortified for erosion protection with large boulders or sizable manufactured concrete objects. When armor is associated with beaches in the form of pebbles to medium-sized stones grading from two to 200 millimeters across, the resulting landform is often termed a ''shingle beach''. Hydrological modeling indicates that stream armor typically persists in a flood stage environment. Hjulstroms Diagram Bed armor is most often transported through entrainment, and more specifically suspension and saltation. Both of these processes involve moving the sediment both near and around the bed of a river. When a sediment is entrained it is being moved downstream through the forces between the layers of water around it, and once it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Bridge Disasters
This is a list of bridge failures. Before 1800 1800–1899 1900–1949 1950–1999 2000–present Bridge disasters in fiction *Harry Potter and the Half-Blood Prince (2005 novel): the fictional Brockdale Bridge, by the Death Eaters (replaced by the real-world Millennium Bridge, London in the 2009 film) *Final Destination 5 (2011 film) * The Bridge over the River Kwai (1952 novel) and its 1957 film adaptation The Bridge on the River Kwai * The Bridge of San Luis Rey (1927 novel) *Ring of Fire (1961 film) *The Cassandra Crossing (1976 film) *The Good, the Bad, and the Ugly (1966 film): bridge intentionally destroyed by Blondie and Tuco *The General (1926 film) * Train Man (1999 novel): featuring destruction of rail bridges over the Mississippi River * X-Men: The Last Stand (2006 film): The Golden Gate Bridge is rerouted by mutants to create a path to Alcatraz Island * Monsters vs. Aliens (2009 film): The Golden Gate Bridge is destroyed by a giant robot but Ginormica s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schoharie Creek Bridge Collapse
The Schoharie Creek Bridge was a New York State Thruway (I-90) bridge over the Schoharie Creek near Fort Hunter and the Mohawk River in New York State. On April 5, 1987 it collapsed due to bridge scour at the foundations after a record rainfall. The collapse killed ten people. The replacement bridge was completed and fully open to traffic on May 21, 1988. The failure of the Schoharie Creek Bridge motivated improvement in bridge design and inspection procedures within New York and beyond. Bridge design and construction The final design for the bridge was approved in January 1952 by the New York State Department of Transportation (previously the New York State Department of Public Works). The design described a crossing consisting of five simply supported spans with nominal lengths of , , , , and . The bridge was supported with pier frames along with abutments at each end. The pier frames were constructed of two slightly tapered columns with tie beams. The columns were fixed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hintze Ribeiro Disaster
At about 21:00 on the night of 4 March 2001, the Hintze Ribeiro disaster (also known as Entre-os-Rios disaster) occurred when the steel and concrete Hintze Ribeiro Bridge collapsed in Entre-os-Rios, Castelo de Paiva, northern Portugal, killing 59 people, including those in a bus from the Asadouro company and three cars that were crossing the Douro river. Fast waters and a storm at the time gave no chance for an immediate rescue, and the victims drowned. The strong river current carried bodies downstream more than to the Atlantic ocean. Bodies were found as far away as the north coast of Spain and one even in France. Hours after the accident, the Minister of Social Equipment Jorge Coelho resigned. The following week, dozens of bridges across Portugal were closed for immediate repair. The tragedy caused widespread shock across the nation, with all television networks broadcasting continuous news bulletins, and many solidarity campaigns being organized to help the victims' relati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glanrhyd Bridge Collapse
On 19 October 1987, a train on the Heart of Wales line derailed and fell into the River Towy due to the partial collapse of the Glanrhyd Bridge near Llandeilo, Carmarthenshire. Four people died as a result of the tragedy; the driver and three of the passengers drowned. Description The event took place early on Monday 19 October 1987. The 05:27 passenger train from Swansea to Shrewsbury, consisting of a two-car Class 108 DMU''Report on the Collapse of Glanrhyd Bridge'' (1990), page 1 fell into the River Towy near Llandeilo at approximately 07:00. The accident was caused by the Glanrhyd Bridge being partially washed away by the swollen river. The train was moving at only , which was the normal speed limit for this bridge. Carwyn Davies, a nearby farmer (and amateur rugby player for Llanelli), had waited until 07:00 for daylight so he could investigate the flooding on his farm. He was from the bridge in a flooded field when he saw that a central section of the railway bridge wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Custer Creek Train Wreck
The Custer Creek train wreck (sometimes called the Saugus train wreck) is the worst rail disaster in Montana history. It occurred on June 19, 1938 when a bridge, its foundations washed away by a flash flood, collapsed beneath Milwaukee Road's '' Olympian'' as it crossed Custer Creek, near Saugus, Montana, south-west of Terry, killing at least 47 people. Bridge AA-438 The bridge, number AA-438, was long and had been constructed in 1913. It consisted of two plate girder spans and five reinforced concrete trestle slab spans carrying the single track across the creek resting on concrete piers. An inspection of the bridge earlier that year had concluded the bridge was in good condition with sufficient rip-rap in place to prevent scouring. ICC Investigation No.2278 Custer Creek Custer Creek itself normally runs dry for nine months of the year and had never been known to rise to a depth of more than . But on the night in question a cloudburst deposited an estimated of rain on t ... [...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 Comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Groynes
A groyne (in the U.S. groin) is a rigid hydraulic structure built perpendicularly from an ocean shore (in coastal engineering) or a river bank, interrupting water flow and limiting the movement of sediment. It is usually made out of wood, concrete, or stone. In the ocean, groynes create beaches, prevent beach erosion caused by longshore drift where this is the dominant process and facilitate beach nourishment. There is also often cross-shore movement which if longer than the groyne will limit its effectiveness. In a river, groynes slow down the process of erosion and prevent ice-jamming, which in turn aids navigation. Groynes run generally perpendicular to the shore, extending from the upper foreshore or beach into the water. All of a groyne may be underwater, in which case it is a ''submerged groyne''. They are often used in tandem with seawalls and other coastal engineering features. Groynes, however, may cause a shoreline to be perceived as unnatural. Groynes are generally s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Levee
A levee (), dike (American English), dyke (Commonwealth English), embankment, floodbank, or stop bank is a structure that is usually earthen and that often runs parallel to the course of a river in its floodplain or along low-lying coastlines. The purpose of a levee is to keep the course of rivers from changing and to protect against flooding of the area adjoining the river or coast. Levees can be naturally occurring ridge structures that form next to the bank of a river, or be an artificially constructed fill or wall that regulates water levels. Ancient civilizations in the Indus Valley, ancient Egypt, Mesopotamia and China all built levees. Today, levees can be found around the world, and failures of levees due to erosion or other causes can be major disasters. Etymology Speakers of American English (notably in the Midwest and Deep South) use the word ''levee'', from the French word (from the feminine past participle of the French verb , 'to raise'). It originat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prefabricated
Prefabrication is the practice of assembling components of a structure in a factory or other manufacturing site, and transporting complete assemblies or sub-assemblies to the construction site where the structure is to be located. The term is used to distinguish this process from the more conventional construction practice of transporting the basic materials to the construction site where all assembly is carried out. The term ''prefabrication'' also applies to the manufacturing of things other than structures at a fixed site. It is frequently used when fabrication of a section of a machine or any movable structure is shifted from the main manufacturing site to another location, and the section is supplied assembled and ready to fit. It is not generally used to refer to electrical or electronic components of a machine, or mechanical parts such as pumps, gearboxes and compressors which are usually supplied as separate items, but to sections of the body of the machine which in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
