Construction of the Hong Kong-Zhuhai-Macao Bridge will receive a significant boost with the arrival on site of the first undersea tube, which will be a part of the undersea tunnel under the bridge.
The tube is to be transported to the construction site on a float and will be delivered on Thursday. The float will cover at least 13 kilometers before it gets to the construction site. After an eight hour journey including going through a 90 degree turn, the tube will arrive at the pipeline junction at the West artificial island.
Following a 10-hour fixing process, the immersed tube will be docked to the foundation bed on the sea floor. It will be finished by Sunday morning. After the setting process, another week’s time will be needed to carry out the backfill process.
The construction of the bridge started in 2010. The project consists of a cross-sea bridge, a sub-sea tunnel and an artificial island linking it all together. The immersed tube is the first section of the undersea tunnel. The whole tunnel will have 33 immersed tubes. The first immersed tube is the smallest one - 112 meters long, 45 meters wide and 11.2 meters high. The weight of the tube is 4,700 tons, which amounts to the weight of a small aircraft carrier.
News and photo from CNTV.NET.