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The Tianshan Shengli Tunnel, the world’s longest expressway tunnel, completed tunnelling yesterday morning, paving the way for the opening of a new shortcut linking southern and northern parts of Northwest China’s Xinjiang Uygur Autonomous Region, the Xinhua News Agency reported.
The 22.13-kilometre tunnel, “Shengli,” which means “victory” in Chinese, will reduce the time it takes to drive across the middle section of the Tianshan Mountains from several hours to about 20 minutes once operational, according to Xinhua.
The design features a dual-direction, four-lane tunnel with a design speed of 100 kilometres per hour.
It is located in the remote depths of the Tianshan Mountains, at an average altitude of over 3 000 metres, China Media Group (CMG) reported yesterday.
Over the past four years, more than 3 000 workers have worked continuously in high-altitude, low-oxygen environments, while tackling numerous geological challenges and risks such as rock bursts, large deformations in soft rock, and collapses, according to the CMG report.
The project faces severe environmental conditions and highly complex geology. Typically, it would take about 72 months to complete the tunnel using conventional methods.
However, the builders successfully completed it in just 52 months, according to CMG.
It is a key project of the Urumqi-Yuli Expressway, which runs from the regional capital of Urumqi in northern Xinjiang to Yuli County in southern Xinjiang. The expressway is expected to be fully completed and open to traffic in 2025.
The driving time between the two locations will be reduced from about seven hours to just over three hours, according to Xinhua. — Global Times.
Online Reporter