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The Chinese railway tunnels are divided into four classes by length: Super-long tunnels (over 10,000 metres) Long tunnels (between 3,000 and 10,000 metres) Middle tunnels (between 500 and 3,000 metres) Short tunnels (less than 500 metres) By 2008, there were 6,102 railway tunnels in operation in China. Their total length reached 3,938,913 ...
Eagle's Nest Tunnel (cross-mountain) (road) Eastern Harbour Crossing / Tseung Kwan O line (road and metro) Kai Tak Tunnel (beneath site of former Hong Kong International Airport) (road) Lion Rock Tunnel (cross-mountain) (road and water pipe) Sha Tin Heights Tunnel (cross-mountain) (road) Shing Mun Tunnels (cross-mountain) (road) Tai Lam Tunnel ...
The Beijing underground cross-city railway is a short railway connection in Beijing. This railway line includes the Qiansanmen Tunnel. The speed limit is 120 km/h. [1] It connects the important transportation hubs Beijing railway station and Beijing West railway station via a tunnel.
Huangtong-Baise railway Henggang Tunnel China 13.450 km (8.357 mi) 2027 Pinghu'nan-Yantiangang railway Baimashan Tunnel China 13.407 km (8.3 mi) 2025 Chongqing-Changsha High Speed Railway: Trinacria Tunnel [92] Italy 13.4 km (8.3 mi) 2030 Palermo-Catania Railway Pamuling Tunnel China 13.340 km (8.3 mi)
The longest tunnel along route, the Middle Tianshan Tunnel, is 22.467 km (14.0 mi) in length and one of the longest railway tunnels in China. [5] On 1 January 2021, a branch from south of Kalpin to Tumxuk was opened to passenger service. It is 31 kilometres (19 mi) long and has a design speed of 100 kilometres per hour (62 mph). [6]
The New Guanjiao Tunnel was designed for two parallel single-track tunnels with speeds of up to 160 kilometres per hour (99 mph). The total construction duration was projected to be 5 years. The tunnel was bored in difficult geological conditions and high altitude , exceeding 3,300 metres (10,800 ft) above sea level.
The China Railway 17th Bureau Group was responsible for the construction. The tunnel has a maximum burial depth of 705 m (2,313 ft) and passes through 9 large mountain fracture zones. 45% of the sections are risky sections. The construction site seeps 110,000 m 3 (140,000 cu yd) of water every day, and geological disasters occur from time to time
According to the chief engineer, Zhang Mei, the line was the most difficult ever constructed in China. [10] As of mid-2009, the embankments, bridges, and tunnels along the Yiwan Railway had been mostly completed, and about half the rails had been laid. [4] On 18 August 2010, the line's construction was completed. [10]