The 6,000-tonne wedge, the final piece of an undersea tunnel of the Hong Kong–Zhuhai–Macao Bridge (HZMB), was successfully installed on Tuesday, according to media reports.

 

媒体报道，港珠澳大桥海底隧道的最后一块部件，重达6000吨的接头周二被成功安装完毕。
 

 

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.

 

The tunnel, which is over 5.6-kilometer long, is a crucial and the final part of the construction of an overall 6.7-km underwater tunnel on the seabed that constitutes the bridge. 

 

Once completed, the HZMB will have a total length of about 55 km, including a 6.7-km underwater tunnel and a 23-km bridge over the sea. It will connect Zhuhai in Guangdong Province with Hong Kong and Macao.

 

The construction of the underwater tunnel is reported to be a difficult part of the HZMB, the longest cross-sea bridge in the world.