Vietnam is building its longest sea-crossing bridge, the Lach Huyen bridge, near the city of Haipong.
In order to construct the bridge, two land reclamation strips have been created to serve as work platforms. The 4.1 km long platforms were built by using TenCate’s Geosynthetics.
The 5.44 km long bridge, is set to open in February 2017 and will link Haiphong and capital city Hanoi to the new deep sea Lach Huyen port. The bridge will cross the estuaries of the rivers Bach Dang and Cam. It will also span a 500 m wide navigational channel.
To allow the bridge construction to be carried out on dry land, two works platforms were made on each side of the bay. The platforms were reclaimed along the alignment of the bridge, having a width of 26 m and 3.9 km in total length.
About 27 km of TenCate geotextile tubes were used as reclamation bund, segmentally stacked up to 5 layers high over intertidal soft clay deposits for the construction of the platforms.
Each tube is 50 meters in length and varying in diameter from 4.6 to 9.5 meters. No less than 500,000 cubic meters of sand was needed for building the works platforms.
Sand was dredged offshore and transported to the site using a combination of barging and hydraulic pumping for the construction of the platforms.