GUANGZHOU, May 2 -- Chinese engineers installed a 6,000-tonne key part of the world's longest cross-sea bridge linking Hong Kong, Zhuhai and Macao.
The wedge, 12 meters long, and weighing more than 25 Airbus A380 jets, was lowered to connect the tubes which will form the tunnel section of the bridge, said Lin Ming, chief engineer of the island and tunnel section of the bridge.
The 55-kilometer bridge connects Zhuhai in Guangdong Province with Hong Kong and Macao. It includes a 22.9-km bridge and 6.7-km tunnel.
Before the wedge was installed on Tuesday, 33 immersed tubes, each 180 meters long and weighing 80,000 tonnes, had been installed.
"There is only one wedge for a tunnel, and we cannot afford to fail in its installation. It took two years to prepare for today," said Chen Yue, director of the chief engineer's office of the bridge's island and tunnel section. The installation procedure took more than 10 hours.
"The margin of error for the wedge is 1.5 centimeters. We have to measure precisely the influence of wind, current and buoyancy force," said Lin.
"It is like putting a needle through a hole in the sea -- a truly uNPRecedented event in the history of transportation," Lin said.
A gigantic crane, which was transformed from a tanker, was used to hoist the wedge, lowering it to the desired destination between the tubes.
The wedge will be welded and finished by June, Lin said.
【国内英语资讯:China Focus: Key component of worlds longest cross-sea bridge installed】相关文章:
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