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Cranes Finish Lifting for China Road-Rail Bridge

Thursday, January 2, 2020

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Late last month, Chinese engineering firm Zoomlion announced that its cranes had completed lifting work for what is reportedly the world’s longest road-rail cross-sea bridge, located in southeast China. More than 35 company cranes are being used on the project.

The Pingtan Bridge runs 16.32 kilometers long (just over 10 miles), crossing the Haitan Strait in the East China Sea. The project includes three cable-stayed bridges, linking Pingtan Island as well as four nearby islets to the mainland. This will also shorten the commute between Fuzhou, capital of Fujian province, and Pingtan.

Pingtan Bridge History

Prior to the project, Pingtan was largely known for its fisheries, with no bridge connecting the island to the mainland until 2010, when the Strait Bridge began operations, allowing only for automobile traffic. That same year, China launched the Pingtan Comprehensive Pilot Zone in order to further develop cooperation and exchange with the island. This also meant improving the island’s infrastructure.

Zoomlion

Late last month, Chinese engineering firm Zoomlion announced that its cranes had completed lifting work for what is reportedly the world’s longest road-rail cross-sea bridge, located in southeast China. More than 35 company cranes are being used on the project.

Construction began in 2013. Part of what made this endeavor unique was its location: That part of China had long been seen as prohibitive to bridge construction, due to the region’s high waves and gale winds that prevail throughout most of the year. According to Xinhua, the sea is among the world’s three most perilous, with the other two being Bermuda and the Cape of Good Hope.

During construction, workers had to contend with these elements as they drilled 1,895 piles into the seabed. As for materials used, 300,000 tons of steel were used in the bridge project, as well as 2.66 million tons of cement. The project features a six-lane expressway along the top, with a high-speed railway along the bottom.

China Railway Construction Co. is serving as the contractor on the project. In their work, they used a pile driver equipped with a GPS device. The equipment has positioning accuracy of within 2 centimeters.

"The new bridge means more than a mere mega project," said Chen Chien-hsiang, a former Taiwan resident who moved to Pingtan a couple of years ago. "It also promises a brighter future for people from Taiwan who chose to live and work here."

In June, the bridge’s main fairway was connected from both ends. The fairway is 532 meters (1,745 feet) long, and will allow for the passage of 50,000-ton-class freighters. The fairway bridge is a steel truss hybrid girder cable-stayed bridge.

"We try every means to reduce the time of on-site construction because only 120 days of the year are suitable for construction," said Liu Zhijun, the project's chief commander.

Recent Developments

When Zoomlion faced the region’s strong winds, the company’s research team developed a set of technical solutions.

“We re-designed the configuration of the D1100-63 to ensure wind resistance,” said Zheng Changming, Product Director Large Flat-arm Tower Crane Platform of Zoomlion’s Research Institute.

“The upgraded D1100-63 tower crane can be jacked up when exposed to gale-force 7 winds and can be safely operated up to gale-force 8 which is 20.7 meters per second. In extreme cases, it can withstand wind speeds of up to 46 meters per second, which is the equivalent of a category 14 typhoon.”

The company also added a “cyclotron sector to the D1100-63 tower cranes while keeping the length of arm unchanged to ensure the crane can rotate under extreme weather conditions,” noted Zheng.

According to the company, the Pingtan Road-Rail Bridge project is built to withstand winds of gale-force 10. The bridge is slated to open in 2020.

   

Tagged categories: AS; Bridges; China; Construction; Infrastructure; Ongoing projects; Program/Project Management; Project Management

Comment from Donald Flynn, (1/3/2020, 1:47 PM)

How does a particle accelerator (cyclotron) provide for crane stability? Does the 'cyclotron Sector" compare two paths on same axis but in separate areas of the crane to measure deflection?


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