Introduction to Baziling Tunnel?

The Baziling Tunnel is located in Changyang County and Badong County, Hubei Province. The tunnel is 3.5Km long and is designed and constructed according to two-way four-lane highway standards.

The Baziling Tunnel of the Shanghai-Chengdu West Expressway is located in Changyang County and Badong County, Hubei Province. The tunnel is 3.5Km long and is designed and constructed according to the two-way four-lane expressway standard. The contract value is 220 million yuan and the contract period is 30 months. It is constructed by China Railway Engineering Corporation and is a landmark project of the Ministry of Transport’s Western Development.

The tunnel topography and geological conditions are complex, and there are many unfavorable geological phenomena such as karst water inrush, mud inrush, coal seam gas, goaf, fault fracture zone, etc. The entrance of the tunnel is located under National Highway 318, with a minimum burial depth of only 0.5 meters, and is constructed using the underground excavation method; the exit is a bifurcated tunnel used for the first time in domestic highway tunnels. The total length of the bifurcated section is about 500 meters, and the cross-section consists of a four-lane arch. Gradually transition to continuous arch, small clear spacing and standard spacing separated types, in which the maximum single hole excavation width exceeds 26 meters.

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