Big success for world’s longest highway tunnel. Tianshan Shengli Tunnel cross Tianshan Mountains with a total length of about 22.1 kilometers.

Peoples Daily report on August 23, Xinjiang Wuwei Highway Package Project Tianshan Victory Tunnel "Tianshan" TBM successfully passed largest and most dangerous fault zone F6 Borokonu-Aqik Kuduk Fracture zone.

Tianshan Shengli Tunnel maximum buried deep 1112.6 meters. Maximum shaft deep 702 meter.

It is complex construction work:

• 3 Lows: low temperature, low air pressure, low oxygen content
• 4 Highs: high ground stress, high pressure groundwater, high seismic intensity, and high environmental protection level
• 5 Difficulties :  difficulty in exploration, difficult in engineering design, difficult in construction organization, difficult in risk control, difficult in operation and maintenance
• TBM must go 16 fault zones. F6 Borokonu-Achik Kuduk fault zone is largest and most dangerous fault zone. 1900 meters away from the start of Tianshan Shengli Tunnel. Fault zone has 440 meters width and a core area ​​100 meters. It contains more than 10 types of rocks. Granodiorite, carbonaceous slate, quartz schist and marble and.... Geological activities and groundwater make mud outbursts and large-scale collapses during crossing process.

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