en.Wedoany.com Reported - The Southwest Company Guiyang Pumped Storage Power Station upper and lower reservoir connecting road traffic tunnel achieved full breakthrough at 5:30 AM on June 10, 2026. The breakthrough of this key tunnel provides a transportation foundation for the advancement of the main project, resolves construction bottlenecks, and enhances on-site construction safety assurance capabilities.

The upper and lower reservoir connecting road traffic tunnel is located on the 2# section of the project's upper and lower reservoir connecting road, serving as a critical passage in the lower reservoir construction transportation system. The tunnel has a total length of 1,605 meters, with a clear width of 8.5 meters, a clear height of 5.0 meters, and an overall gradient of 6.6%, undertaking the core transportation functions for construction materials, large equipment, and engineering vehicles. The construction area of this tunnel features typical karst landforms, with complex geological structures, poor surrounding rock stability, and prominent collapse risks, resulting in high construction difficulty and stringent safety control requirements. Guiyang Pumped Storage Power Generation Company took the lead in coordination, collaborating with all participating units to optimize construction plans and support techniques, implementing standardized control measures such as timely support, geological "dual exploration," and real-time monitoring and measurement, ultimately achieving safe tunnel breakthrough.

This tunnel breakthrough resolves multiple issues in project construction and provides support for subsequent work. On one hand, it eliminates safety hazards from the original narrow and steep dangerous road sections, reducing traffic safety risks during vehicle passage and material transfer; on the other hand, it optimizes transportation conditions, providing traffic assurance for the entry of large equipment and the transfer of engineering materials.

Guiyang Pumped Storage Power Generation Company stated that it will continue to advance safety control and project quality assurance, steadily progress the project schedule, and promote the high-quality construction of the Guiyang Pumped Storage Power Station.

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