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Underground Construction
Underground construction refers to the construction of underground tunnels, shafts, chambers, and passageways. It is also sometimes used to describe the portion of traditional construction that takes place below ground. History Neanderthals also engaged in underground construction, but they were believed to be less sophisticated in that regard, than humans. Neanderthal construction sites in France have been dated to 174,000 bc, far earlier than the earliest human sites. Human underground construction likely began with cave dwelling pre-historic people who wanted to expand their homes. The purpose of many ancient underground structures is a mystery, for instance erdstalls which are found across Europe. All ancient civilizations practiced some form of underground construction, with some also branching into rock-cut architecture. In early urban centers underground spaces served as Crypt, burial places, provided protection against invaders, and enabled early public utilities. The firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sapporo Underground Under Construction
is a Cities designated by government ordinance of Japan, designated city in Hokkaido, Japan. Located in the southwest of Hokkaido, it lies within the alluvial fan of the Toyohira River, a tributary of the Ishikari River. Sapporo is the capital of Hokkaido Prefecture and Ishikari Subprefecture. As of July 31, 2023, the city has a population of 1,959,750, making it the largest city in Hokkaido and the largest north of Tokyo. It is the List of cities in Japan, fifth-most populous city in Japan and is Hokkaido's cultural, economic, and political center. Originally a plain sparsely inhabited by the indigenous Ainu people, there were a few trade posts of the Matsumae clan, Matsumae domain in the area during the Edo period. The city began as an administrative centre with the establishment of the Hokkaidō Development Commission, Hokkaido Development Commission headquarters in 1869. Inspired by the ancient cities of Kyoto and Heijō-kyō, it adopted a grid plan and developed around Odo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Occupational Safety And Health Administration
The Occupational Safety and Health Administration (OSHA; ) is a regulatory agency of the United States Department of Labor that originally had federal visitorial powers to inspect and examine workplaces. The United States Congress established the agency under the Occupational Safety and Health Act (OSH Act), which President Richard Nixon, Richard M. Nixon signed into law on December 29, 1970. OSHA's mission is to "assure safe and healthy working conditions for working men and women by setting and enforcing standards and by providing training, outreach, education, and assistance." The agency is also charged with enforcing a variety of whistleblower statutes and regulations. OSHA's workplace safety inspections have been shown to reduce injury rates and injury costs without adverse effects on employment, sales, credit ratings, or firm survival. History The Bureau of Labor Standards of the Department of Labor has worked on some work safety issues since its creation in 1934. Economi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Underground City (Beijing)
The Underground City () is a Cold War era bomb shelter consisting of a network of tunnels located beneath Beijing, China. It has also been referred to as the Underground Great Wall since it was built for the purpose of military defense. The complex was constructed from 1969 to 1979 in anticipation of a nuclear war with the Soviet Union, as Sino-Soviet relations worsenedJiang, Steven.Beijing Journal: An underground 'parallel universe'". Cable News Network (2008-02-01). Retrieved on 2008-07-14.Wang, Zhiyong.". China Internet Information Center (2005-04-15). Retrieved on 2008-07-14. and was officially reopened in 2000. Visitors were allowed to tour portions of the complex, ". Beijing China Tourist Information and Travel Guide. Retrieved on 2008-07-14. which has been described as "dark, damp, and genuinely eerie". [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metro-2
Metro-2 () is the informal designation for a clandestine and officially unacknowledged deep underground metro system in the Moscow metropolitan area. It was designed to provide the Politics of the Soviet Union, Soviet leadership with secure wartime Emergency evacuation, evacuation routes, Communications protection, communication hubs, and Command and control#Command and control centers, command posts, including a dedicated bunker for the National Command Authority (United States), national command authority. One such bunker is located beneath the Kremlin. The system was supposedly built, or at least started, during the time of Joseph Stalin and was codenamed D-6 (Д-6) by the KGB. It is supposedly still operated by the Main Directorate of Special Programs of the President of the Russian Federation, Main Directorate of Special Programmes and Ministry of Defence (Russia), Ministry of Defence. Metro-2 is said to have four lines which lie deep. It is said to connect the Moscow Kreml ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheyenne Mountain Complex
The Cheyenne Mountain Complex is a United States Space Force installation and defensive bunker located in unincorporated El Paso County, Colorado, next to the city of Colorado Springs, at the Cheyenne Mountain Space Force Station, which hosts the activities of several tenant units. Also located in Colorado Springs is Peterson Space Force Base, where the North American Aerospace Defense Command (NORAD) and United States Northern Command (USNORTHCOM) headquarters are located. Formerly the center for the United States Space Command (USSC) and NORAD, the Complex monitored the airspace of Canada and the United States for missiles, space systems, and foreign aircraft through its worldwide early-warning system. Since 2008, NORAD and the USSC have been based at Peterson Space Force Base and the complex, re-designated as an Air Force station, is used for crew training and as a back-up command center if required. The military complex has included, in the past, many units of NORAD, US ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missile Silos
A missile launch facility, also known as an underground missile silo, launch facility (LF), or nuclear silo, is a vertical cylindrical structure constructed underground, for the storage and launching of intercontinental ballistic missiles (ICBMs), intermediate-range ballistic missiles (IRBMs), medium-range ballistic missiles (MRBMs). Similar facilities can be used for anti-ballistic missiles (ABMs). The structures typically have the missile some distance below ground, protected by a large "blast door" on top. They are usually connected, physically and/or electronically, to a missile launch control center. With the introduction of the Soviet UR-100 and the U.S. Titan II missile series, underground silos changed in the 1960s. Both missile series introduced the use of hypergolic propellant, which could be stored in the missiles, allowing for rapid launches. Both countries' liquid-fueled missile systems were moved into underground silos. The introduction of solid fuel systems, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forced Labour Under German Rule During World War II
The use of Slavery, slave and forced labour in Nazi Germany () and throughout German-occupied Europe during World War II took place on an unprecedented scale. It was a vital part of the Economics of fascism#Political economy of Nazi Germany, German economic exploitation of conquered territories. It also contributed to the mass extermination of populations in occupied Europe. The Germans abducted approximately 12million people from almost twenty European countries; about two thirds came from Central Europe and Eastern Europe.Part1 an Part 2 . Many workers died as a result ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fortifications
A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from Latin ("strong") and ("to make"). From very early history to modern times, defensive walls have often been necessary for cities to survive in an ever-changing world of invasion and conquest. Some settlements in the Indus Valley Civilization were the first small cities to be fortified. In ancient Greece, large cyclopean stone walls fitted without mortar had been built in Mycenaean Greece, such as the ancient site of Mycenae. A Greek '' phrourion'' was a fortified collection of buildings used as a military garrison, and is the equivalent of the Roman castellum or fortress. These constructions mainly served the purpose of a watch tower, to guard certain roads, passes, and borders. Though smaller than a real fortress, they acted as a bor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subterranea (geography)
Subterranea are ''underground structures'', both natural (such as caves) and human-made (such as Mining, mines). Some subterranea and related topics include: Natural * Caves ** Cenote ** Ice cave ** Sea cave ** Sinkhole * Karst * Lava tube ** Lunar lava tube, Lunar and Martian lava tubes * Subterranean river * Subterranean waterfall * Underground lake * Volcanic pipe Human-made or human-related by common function The following is a list of examples of structures which are or can be underground. * Civil defense ** Air raid shelter ** Blast shelter ** Fallout shelter ** Storm cellar * Cultural heritage ** Catacombs ** Dungeon ** Erdstall ** Fogou ** Hypogeum ** Passage grave ** Rock-cut architecture *** Rock-cut tomb * Disposal of human corpses, Disposal of corpses or religion: ** Burial vault (tomb), Burial vault ** Crypt * Underground living, Living ** Basement ** Cave dweller, Cave dwelling ** Dugout (shelter), Dugout ** Earth shelter ** Underground city * Maintenance ** ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paris Metro Construction 03300288-3
Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of cities in the European Union by population within city limits, fourth-most populous city in the European Union and the List of cities proper by population density, 30th most densely populated city in the world in 2022. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, culture, Fashion capital, fashion, and gastronomy. Because of its leading role in the French art, arts and Science and technology in France, sciences and its early adoption of extensive street lighting, Paris became known as the City of Light in the 19th century. The City of Paris is the centre of the Île-de-France region, or Paris Region, with an official estimated population of 12,271,794 inhabitants in January 2023, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archeology
Archaeology or archeology is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscapes. Archaeology can be considered both a social science and a branch of the humanities. It is usually considered an independent academic discipline, but may also be classified as part of anthropology (in North America – the four-field approach), history or geography. The discipline involves surveying, excavation, and eventually analysis of data collected, to learn more about the past. In broad scope, archaeology relies on cross-disciplinary research. Archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. Archaeology is distinct from palaeontology, which is the study of fossil remains. Archaeology is particularly important for lear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Broadcasting Corporation
The Australian Broadcasting Corporation (ABC) is Australia’s principal public service broadcaster. It is funded primarily by grants from the federal government and is administered by a government-appointed board of directors. The ABC is a publicly-owned statutory organisation that is politically independent and accountable; for example, through its production of annual reports, and is bound by provisions contained within the Public Interest Disclosure Act 2013 and the Public Governance, Performance and Accountability Act 2013, with its charter enshrined in legislation, the ''Australian Broadcasting Corporation Act 1983''. ABC Commercial, a profit-making division of the corporation, also helps generate funding for content provision. The ABC was established as the Australian Broadcasting Commission on 1 July 1932 by an Act of Federal Parliament. It effectively replaced the Australian Broadcasting Company, a private company established in 1924 to provide programming for A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
