Mega Project - Upgrading the 4th Ring Transportation Corridor in Zhengzhou, Henan, China

The City of Zhengzhou is a major transportation hub in the heart of China. The fast-growing city was in need of an additional elevated expressway to increase the traffic capacity from 10 lanes to 18 lanes on the 4th Ring Transportation Corridor. The additional elevated expressway has a total length of 93 km without traffic lights and faced complex boundary conditions. The focus of this project was to increase the capacity, by reducing the impact to the current traffic flow in a very short time frame and to meet the government requirements to implement green construction technology, which called for an innovative solution. The ABC with the precast segmental bridge technology using the short-line match casting method deemed to be the only answer to fulfill the requirements from the owner and the government. Eight completely new PC yards with over 400 PC stations were designed and were ready for production within 5 months. With over 50,000 segments, this is the largest precast segmental bridge construction project in the world.

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