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The objective was to construct two 7.6 m-diameter (25 ft) rail tunnels, 30 m (98 ft) apart, 50 km (31 miles) in length; a 4.8-metre-diameter (16 ft) service tunnel between the two main ones; pairs of 3.3 m (10 ft 10 in)-diameter cross-passages linking the rail tunnels to the service tunnel at 375 m (1,230 ft) spacing; piston relief ducts 2 m (6 ...
Inguri Hydroelectric Power Station Water Tunnel Georgia (at the time of construction Soviet Union) 15,279 m (9.494 mi) 1978 Metro Shanghai Subway: Line 2: Shanghai, China 15,274 m (9.491 mi) 2000 Between Zhanjianggaoke station and Lingkong Station Water supply Jinquidi Tunnel, Niulan River Diversion to Dianchi Yunnan, China 15,257 m (9.480 mi)
Kaole Tunnel China 14.659 km (9.109 mi) 2027 Lanzhou-Hezuo Railway: Tongbaiyuan No1 Tunnel China 14.616 km (9.1 mi) 2028 Yan'an-Yulin-Ordos High Speed Railway: Hiyoshi Tunnel [71] Japan 14.532 km (9.0 mi) 2027 Chūō Shinkansen Linjiashan Tunnel China 14.530 km (9.029 mi) 2026 Xi'an-Ankang HSR: Yujialiang Tunnel
High Speed 1, the line from London to the Channel Tunnel in Kent has even more capacity – it could triple the number of trains and still have room for more. But it all depends on new entrants ...
By way of comparison, the 50-kilometer (31-mile) Channel Tunnel linking England and France, completed in 1993, cost the equivalent of £12 billion ($13.6 billion) in today’s money.
The Channel Tunnel opened to passenger trains in November 1994. In the 29 years since then, Eurostar has had the market to itself. It currently runs from London St Pancras International to Paris ...
Arpa-Sevan Tunnel [45] Armenia (at the time of construction USSR) 48.3 km (30.0 mi) 1981 Water supply #1 Tunnel, Yellow River Diversion to Shanxi North Line Shanxi, China 43.7 km (27.2 mi) 2011 Water supply #7 Tunnel, Yellow River Diversion to Shanxi South Line Shanxi, China 43.5 km (27.0 mi) 2002 Water supply High Island Water Tunnels
Construction began at the same time as boring for the tunnel, which provided large amounts of soil to be used to stabilise and level the terminal site before construction of the facility was undertaken. At the same time, a pipeline was provided connecting Sandgate and Goodwin Sands for the transport of dredged sand to the site. A 6.5 kilometres ...