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Qinling Tunnel of the Xi"an-Ankang Railway Line

This tunnel consists of two single-line tubes, which are almost parallel to each other. We applied TBM excavation technology for the Ñrst time during the tunnel"s construction and successfully solved the diÇculties created by unfavorable geographical conditions, single-ended ventilation in the tunnel and hard rock blasting. We achieved six new national records in tunnel construction and successfully completed the project before the deadline. The project was completed in 2000 with a total contract value of RMB750 million. We received the National Science and Technology Advancement Award in 2003, the Luban Award in 2002 and the Zhan Tianyou Award in 2003 for this project;

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