en.Wedoany.com Reported - Recently, the Gongjue High Mountain Tunnel, a key control project of the Xizhao Expressway invested and constructed by China Railway Group Limited City Investment and built by China Railway First Group, achieved breakthrough. With the last section of rock mass precisely drilled through, this tunnel, which has the highest elevation and the second-longest length along the entire line, completed its double-line breakthrough.

The tunnel breakthrough project is located in the Liangshan Yi Autonomous Prefecture, Sichuan Province, China, spanning Zhaojue County and Xichang City. It is a separated double-line extra-long tunnel with a total length of approximately 12 kilometers, of which the left tube is 12,090 meters long and the right tube is 12,037 meters long. The tunnel body mainly consists of Grade IV and V surrounding rock and passes through multiple fault structural zones, with extremely complex geological conditions. During the construction process, the project team overcame construction difficulties such as fractured surrounding rock and dense fault structural zones in a high-altitude working environment. Through precise rock mass drilling operations, they completed the tunnel excavation and successfully achieved the tunnel breakthrough.

This tunnel is a key control project of the Xizhao Expressway. This tunnel breakthrough provides critical conditions for the subsequent construction advancement of the Xizhao Expressway. After the project is completed and opened to traffic, the travel time from Xichang to Zhaojue will be shortened to about 1 hour, and the travel time to Zhaotong will be reduced to about 2.5 hours.

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