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Key tunnel completed for Sichuan-Tibet Railway
update:June 11,2018
June 11,2018--Dekyi Tunnel, one of the most difficult parts of the Lhasa-Nyingchi Section of the Sichuan-Tibet Railway, was completed Wednesday after three years’ toil.
The construction of the 1.175-kilometer Dekyi Tunnel started in July 2015. With high altitude and extreme climate, the tunnel cuts through many seismic and fault zones in the valley area of Yaruzampbo River, especially the aeolian sand section.
The 300-meter aeolian sand section of Dekyi Tunnel has a maximum depth of 110 meters, which increases the risk of rock bursts. 
Chen Junlong, Dekyi Tunnel project manager of China Railway No.5 Engineering Group Co., Ltd., said that the tunnel was very easy to collapse in construction due to its geographic instability.
“Innovative techniques were adopted to overcome the difficulties,” he added.
The 402-kilometer Lhasa-Nyingchi Section of the Sichuan-Tibet Railway is the first electrified railway in Tibet, in which the length of bridges and tunnels totals 301 kilometers. 
By: Ma Yangyang
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