Hangzhou Bay Bridge, China
04/10/2008 23:46
EST (0148 GMT)
GLOBAL POSITIONING SYSTEM
Trimble is providing Global Positioning Systems for the monitoring of the construction. The project requires precise positioning for the bridge span off the coast. By using the Trimble 5700 RTK GPS systems with a reference station for differential corrections, accuracy is improved at longer distances enhancing the productivity.
50 5700 RTK GPS systems have been set up where the bridge crosses the Bay of Hangzhou and additional systems are located on barges in order to provide millimetre accuracy for the real-time positioning of piles and pre-fabricated sections of the bridge.
AUXILIARY FACILITIES AND STRUCTURES
At the middle of the bridge, there will be a 10,000m? service island for drivers to rest and enjoy a full range of services, including hotels, restaurants, petrol stations and a viewing tower. It is also expected the service island will become a tourist destination for watching the Qiantang River Tide. The service island will be built entirely on piers to avoid disrupting the tide.
The bridge requires the installation of traffic safety devices, monitoring systems, communications equipment, toll plazas, power supply, lighting and maintenance and office buildings. Two public parks are planned on each side of the bridge.
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