秦岭天台山隧道

　　陕西宝坪高速公路控制性工程秦岭天台山隧道全长15.56公里，双向六车道设计，建设规模目前居世界第一。中交二公局承担天台山隧道主洞3180米及1号斜井施工任务。斜井纵坡达到-40.175%，隧道施工采用有轨运输系统、水压聚能爆破等先进工艺，标准化施工被树为陕西省样板。
　　Shaanxi Baoji-Pingkan Expressway Controlling Project-Qinling Mt. Tiantai Tunnel is 15.56 km long, with two-way six-lane design; and its construction scale ranks first place in the world at present. CCCC Second Highway Engineering Co., Ltd. is responsible to construct 3180m long of the main tunnel and No.1 inclined shaft construction work of Mt. Tiantai Tunnel. The longitudinal slope of inclined shaft reaches-40.175%. The tunnel construction adopts advanced technology such as rail transportation system and water pressure accumulative energy blasting. The standardized construction is a model of Shaanxi province.