Successful Installation of the 10,000-ton Main Bridge

On February 26, the 12000-ton-gross-weight main bridge of the Cross-Bay Bridge in Tseung Kwan O, Hong Kong completed the installation successfully by using integral floating support method, making a significant breakthrough in the construction of the Project. The Director of Civil Engineering and Development, Mr. LAU Chun-kit, Ricky, JP.visited the site to cheer up the project team.

The integral floating support method boasts the advantages of short operation time, large lifting capacity and fast construction speed, which is often used for the installation of offshore platforms. The Tseung Kwan O Cross Bay Bridge is the first application case of the integral floating support method in domestic bridge construction, which is of great significance to promote the application of this method in the field of bridge construction.

Before the overall installation, the project department monitored the wind, wave and tide conditions at the bridge site for several days through professional fixed-point weather forecast, and finally determined February 26 as the most suitable installation time. The installation scheme of gradually transferring the load of the main bridge to the temporary jack set on the pier in advance by utilizing the fluctuation of the sea tide level and the ballast adjustment function of the transport barge was established. Beginning at 6: 30 am on February 26, the installation was completed in nearly five hours, one hour ahead of schedule, through five steps including ship shifting, coarse alignment, fine alignment, load shifting, and ship shifting. Each link in the installation process was subject to precise calculation by the engineering personnel, ensuring the smooth progress of the Project.

Tseung Kwan O Sea-Crossing Bridge is located in Sai Kung, Hong Kong. It is about 1.8 km long with two-way two-lane design. The main structure of the bridge is an external floating butterfly steel arch bridge with a span of 200 meters and a deck width of 35.8 meters. After completion, the Project will become another landmark large-scale sea-crossing bridge after Tsing Ma Bridge and Stonecutters Bridge in Hong Kong, and become the first offshore elevated bridge with traffic lanes, pedestrian paths, single-car paths and a viewing platform, providing a fast access to the city center in the southeastern part of Tseung Kwan O for the benefits of local people.