On May 25, the construction site of the Yangjia River Grand Bridge on the Huangbai Railway in Huahuo Town, Ziyun Autonomous County, was bustling with tower cranes and roaring machinery as construction surged ahead. Currently, 92% of the bridge's pile foundation works have been completed, 18 of the 57 piers have been capped, and the remaining piers and abutments are advancing efficiently at a rate of "one segment every three days."

The Huangbai Railway, about 312 kilometers long with a design speed of 160 km/h, is a key project in the national "14th Five-Year Plan" railway development plan and a core project of the western route of the New Western Land-Sea Corridor. The Ziyun section features complex geology and is known as "an infrastructure breakthrough project in a geological museum," with the Yangjia River Grand Bridge serving as a key controlling project.

The bridge's pile foundations must pass through karst strata densely packed with caves and underground rivers. The technical team adopted a "steel casing follow-up + karst cave filling" process to overcome construction challenges such as slurry leakage and hole collapse. For the No. 41 main pier, which reaches a maximum height of 117 meters, the project used hydraulic climbing formwork technology to control construction precision at the millimeter level, ensuring the quality and safety of high-pier construction.

The project organized more than 180 builders working in shifts to tackle the challenges, strictly safeguarding safety and quality while scientifically allocating resources to accelerate the schedule. The efficient progress of the Yangjia River Grand Bridge not only provides a model for railway construction in complex geological conditions but will also improve the railway network in southwest China, boosting regional connectivity, industrial development, and economic quality improvement.