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New Guanjiao Tunnel
New Guanjiao Tunnel () is a tunnel on the 2nd line of Qinghai–Tibet Railway in Guanjiao Mountain, Qinghai province. It is dual-bored, double-track rail tunnel. The total length of the tunnel is , which makes it the longest railway tunnel in China. China Railway First Survey and Design Institute is responsible for the design. The New Guanjiao Tunnel was designed for two parallel single-track tunnels with speeds of up to . The total construction duration was projected to be 5 years. The tunnel was bored in difficult geological conditions and high altitude, exceeding above sea level. The construction started in 2007 and was completed in April 2014. The tunnel was opened on 28 December 2014. The tunnel's northeastern portal () is in Tianjun County, the southwestern portal () is in Ulan County Ulan or Wulan ( Mongolian: ; ; ) is a county of Qinghai Province, China. It is under the administration of Haixi Mongol and Tibetan Autonomous Prefecture Haixi Mongolian and Tibetan A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qinghai Province
Qinghai (; alternately romanized as Tsinghai, Ch'inghai), also known as Kokonor, is a landlocked province in the northwest of the People's Republic of China. It is the fourth largest province of China by area and has the third smallest population. Its capital and largest city is Xining. Qinghai borders Gansu on the northeast, Xinjiang on the northwest, Sichuan on the southeast and the Tibet Autonomous Region on the southwest. Qinghai province was established in 1928 during the period of the Republic of China, and until 1949 was ruled by Chinese Muslim warlords known as the Ma clique. The Chinese name "Qinghai" is after Qinghai Lake, the largest lake in China. The lake is known as Tso ngon in Tibetan, and as Kokonor Lake in English, derived from the Mongol Oirat name for Qinghai Lake. Both Tso ngon and Kokonor are names found in historic documents to describe the region.Gangchen Khishong, 2001. ''Tibet and Manchu: An Assessment of Tibet-Manchu Relations in Five Phases of De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High Altitude
Altitude or height (also sometimes known as depth) is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The exact definition and reference datum varies according to the context (e.g., aviation, geometry, geographical survey, sport, or atmospheric pressure). Although the term ''altitude'' is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage. Vertical distance measurements in the "down" direction are commonly referred to as depth. In aviation In aviation, the term altitude can have several meanings, and is always qualified by explicitly adding a modifier (e.g. "true altitude"), or implicitly through the context of the communication. Parties exchanging altitude information must be clear which definition is being used. Aviation altitude is measured using either mean sea level (MSL) or local ground level (above ground level, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tianjun County
Tianjun County is a county of Qinghai Province Qinghai (; alternately romanized as Tsinghai, Ch'inghai), also known as Kokonor, is a landlocked province in the northwest of the People's Republic of China. It is the fourth largest province of China by area and has the third smallest pop ..., China, bordering Gansu Province to the north. It is under the administration of the Haixi Mongol and Tibetan Autonomous Prefecture. The county seat in Xinyuan Town (). Climate Economy The county is served by the Qinghai–Tibet Railway; its Tianjun railway station is located near the county seat, Xinyuan Town. Large coalfields are worked near Muli Town () in the northern part of the county, at the elevation around 4,000 m above the sea level. The Muli coal fields are connected with the Ha'ergai railway station on the Qinghai–Tibet Railway by a long branch railway, whose two sections are known as the Chada'er Railway () and the Cha-Mu Railway (). References County ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulan County
Ulan or Wulan ( Mongolian: ; ; ) is a county of Qinghai Province, China. It is under the administration of Haixi Mongol and Tibetan Autonomous Prefecture. County seat is Xireg. The name of the county comes from a Mongolian word which means "red". Climate Transportation The county is served by the Qinghai-Tibet Railway, which has a station at the county seat. There is also a freight-only branch to the salt works on the Chaka Salt Lake Chaka Salt Lake ( zh, s=茶卡盐湖, p=Chákǎ Yánhú; bo, ཚྭ་ཁ་མཚོ་) is a salt lake in Ulan County, Haixi Prefecture, Qinghai, China. The oval-shaped lake is located near the eastern end of Qaidam Basin, to the west of the pr ... ( 茶卡盐湖) near Chaka Town ( 茶卡镇), in the southeastern part of the county. References County-level divisions of Qinghai Haixi Mongol and Tibetan Autonomous Prefecture {{Qinghai-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railway Tunnels In China
Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in Track (rail transport), tracks. In contrast to road transport, where the vehicles run on a prepared flat surface, rail vehicles (rolling stock) are directionally guided by the tracks on which they run. Tracks usually consist of steel rails, installed on Railroad tie, sleepers (ties) set in track ballast, ballast, on which the rolling stock, usually fitted with metal wheels, moves. Other variations are also possible, such as "slab track", in which the rails are fastened to a concrete foundation resting on a prepared subsurface. Rolling stock in a rail transport system generally encounters lower friction, frictional resistance than rubber-tyred road vehicles, so passenger and freight cars (carriages and wagons) can be coupled into longer trains. The rail transport operations, operation is carried out by a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
