"Tianshan" tunnel boring machine

The world's first hard-rock tunnel boring machine using the deflection-tolerant, shield-supported, and extended-segmented concrete placement technology

It weighs about 2,000 tonnes with an excavation diameter of 8.43 meters. It can handle complex geological conditions such as soft rock deformation, high stress, and fractured zones, successfully completing excavation of the Tianshan Shengli Tunnel together with the Shengli Hao heading machine.