Qingdao Traffic Construction Group Co., Ltd. holds the class-A license for professional contracting of tunnel engineering and has successively undertaken the engineering of over 30 tunnels. It has gathered technologies and experience in construction under complicated geological conditions including weak surrounding rocks, extra-shallow-buried tunnel, large span, water rich, high elevation, frozen earth, lava, etc. Among them, the No.2 Snow Mountain Tunnel on Huashixia-Jiuzhi Expressway in Guoluo Tibetan Autonomous Prefecture, Qinghai, is located in an altitude of over 4200m. The Company has overcome the high altitude, frozen earth, and other severe natural conditions with its strength, and the constructors perfectly showcased the perseverance of the employees of Qingdao Traffic Construction with an attitude of “enduring hardship and persevering through oxygen deficiency”.
