Latin high -speed second phase of the first special tunnel dual -line penetration

At 16:00 on July 9th, with a sound of artillery, the first specialist (more than 3000 meters) of the Lathe Day Phase II in the 4th Bureau of the China Railway Fourth Bureau penetrated the Rinbu Tunnel. A major progress.

It is understood that the Rinbu Tunnel is the heavy difficulty of the construction of the second phase of the Latin high -speed speed. It started in June 2020. The left -line tunnel was 3380 meters, the right tunnel was 3355 meters long, and the average length was 3367 meters. The method of excavation, the tunnel surrounding rocks are mainly level III, IV, and grade, and the geological conditions are complex and changeable.

"In the construction process, we can solve the problem of hypoxia in the cave through measures with high -pressure oxygen compartment, plateau -specific fan, etc., and ensure the health of the construction staff; through the design change, the geological conditions of the tunnel into the cave are poor, and the pink sand land is mostly prone to collapse. Difficulty; through strict control of the tunnel's feet, strengthen drainage drainage, solve the problem of poor geological conditions of the plateau tunnel, and have a large problem of staged water. "Xie Keming, the manager of the 12th bidding section of the Yaye Expressway of the China Railway Fourth Bureau The implementation of the hook chart and reverse construction period will be implemented. The main project will end at the end of this year. In the first half of next year, it will be prepared to submit the inspection and strive to end the construction period half a year in advance.

Source: China Tibet News Network

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