Geosynthetics for the Lach Huyen Bridge, Haiphong
The longest sea-crossing bridge in Vietnam is under construction close to the Vietnamese city of Hải Phòng (Haiphong), situated near the Gulf of Tonkin. This massive infrastructure project involves the building of a new deep sea port for the northern region of Vietnam and the construction of a motorway. Geosynthetics from TenCate are used in constructing works platforms, a dredged spoil containment facility and the temporary sand storage.
The new port of Lach Huyen on the eastern side of Cat Hai island is suitable for handling large container vessels and the government is looking forward to the expected growth in transhipment. The new 15.6 km-long highway will link the Hanoi-Haiphong expressway on the mainland to the port of Lach Huyen. A 5.4 km-long bridge, with 84 spans supported by piers, is under construction where the connecting road runs over the combined estuary of the rivers Bach Dang and Cam. The part of the bridge spanning the navigational channel measures half a kilometre.
Work on the construction platform (in an easterly direction)
To facilitate the bridge construction, two works platforms have been reclaimed, each 26 metres wide and in total 4.1 kilometres long. This is where TenCate Geotube® technology plays a role: 23.5 kilometres of TenCate Geotube® containers, each 50 metres in length and varying in diameter from 4.6 to 9.5 metres. No less than 500,000 cubic metres of sand are needed for building the works platforms. This sand was extracted in the immediate vicinity and stored in a depot near the bridge.
Work on the construction platform (in a westerly direction)
Construction of the works platforms started in September 2014 and was completed in mid-May 2015. TenCate Geotube® containers with a standard length of 15 metres and a circumference of 9.5 metres are also used for the dike around the 600,000 cubic meters capacity dredged spoil containment facility.
Work on the construction platform, with a row of TenCate Geotube® containers clearly visible
The works platforms reclaimed with the aid of TenCate Geotube® are embedded in a future land reclamation project.
Solutions using this technology mean savings in costs and construction time, as well as a reduced CO2 footprint. Use is made of locally available sand.
Diagram showing the works platform, also known as access road B (Schematic provided by Sumitomo, contractor)
The paper on this project is available.