Yunnan Huali Expressway
BEST PROJECT, Road/Highway
Submitted By: CCCC
Owner: Yunnan Huali Expressway Investment and Development Co.
Lead Design Firm, Structural Engineer: Broadvision Engineering Consultants
General Contractor: CCCC
Despite a contract duration of nearly five years, the project team delivered this two-way, four-lane expressway that spans 151 km, or 93 miles, with a 25.5-m-wide roadbed from Rongjiang Town to Lijiang City in China, six months ahead of schedule. Factors complicating the effort included the remote nature of the project as well as its location in the Xianshuihe Fault Zone, which meant frequent seismic activity and complex and, at times, undesirable geological structures. Given the project’s location in high altitude areas and its passage through portions of the country with high ethnic minority populations, communication and coordination also provided challenging.
A critical portion of the project is the Jinan Jinshajiang Bridge, a single-span, double-hinged plate truss combined suspension bridge located over a fast-flowing river and complex regional geological conditions, which made choosing its final location difficult. The project team developed intelligent cable lifting equipment and control technology for the 1,500-m span and 220-ton class suspension bridge. The superstructure is comprised of six 41-m steel plate composite beams, a 1,386-m single-span double-hinged plate truss combined suspension bridge and a 40-m steel plate composite beam.
Photo courtesy CCCC
Construction passed through Lijiang Old Town, a more than 800-year-old national first-class historical and cultural city, as well as the Yulong Snow Mountain and Chenghai Nature Reserve—which are 5A national scenic spots—as well as other environmentally sensitive areas with fragile ecological environments. The design team implemented a concept of “safety, harmony, environmental protection and demonstration” throughout the project’s design.
Through eight design optimizations, including adjusting the alignment of the Xinmin Tunnel’s entrance, as well as the alignment of the Akendong Bridge and Twelve Baluster Slope Tunnel, the project team was able to save more than $4 million in construction costs.
Photo courtesy CCCC