中交二公局承建陜西寶雞至甘肅天水高速公路9個標(biāo)段，其中隧道12座，單洞總長11298.51米，主要有那下灣隧道、放牛坡隧道等千米以上隧道。
　　CCCC Second Highway Engineering Co., Ltd. has contracted to build nine sections of the Shaanxi Baoji-Gansu Tianshui Expressway, 12 of which are tunnels with a total length of single hole of 11,298.51m. The main tunnels are Naxiawan Tunnel and Fangniupo Tunnel, which are more than 1000m long.