Tsing Ma Bridge | হংকং | longest bridge

Tsing Ma Bridge | হংকং | longest bridge | bangla travel vlogs
Tsing Ma Bridge is a bridge in Hong Kong. It is the world's 16th-longest span suspension bridge, and was the second longest at the time of its completion. The bridge was named after the two islands it connects, namely Tsing Yi and Ma Wan. It has two decks and carries both road and rail traffic, which also makes it the largest suspension bridge of this type. The bridge has a main span of 1,377 metres (4,518 ft) and a height of 206 metres (676 ft). The span is the longest of all bridges in the world carrying rail traffic.

The 41-metre-wide (135 ft) bridge deck carries six lanes of automobile traffic, with three lanes in each direction. The lower level contains two rail tracks and two sheltered carriageways used for maintenance access and traffic lanes when particularly severe typhoons strike Hong Kong and the bridge deck is closed to traffic

The Tsing Ma Bridge is the most prominent element of the Lantau Link, an infrastructure project built to connect Lantau, Hong Kong's largest island, to the urbanised areas of the territory. Until this link opened in 1997, Lantau Island could only be accessed by water, and was completely rural. The Lantau Link was built as part of the Airport Core Programme, which ultimately served to provide Hong Kong with a brand new airport at Chek Lap Kok (off the north coast of Lantau) to replace the older, congested Kai Tak Airport.

Numerous consortia bid on the contract to construct the bridge. Hyundai made the lowest bid but were disqualified for non-compliance with the financial requirements. A Japanese bid was ruled out for being too expensive. The Anglo Japanese Construction Joint Venture, comprising Costain, Mitsui, and Trafalgar House, won the job. Construction work on the bridge began in May 1992. Gammon Construction constructed the caissons for the bridge towers. The framework for each caisson was floated into place and sunk, and then filled with concrete underwater.The two caissons on the Ma Wan side weigh 4,500 tons each, while those on the Tsing Yi side (closer to shore) each weigh about 3,000 tons. Land reclamation was carried out at both ends of the bridge. The more substantial reclamation on Ma Wan was used as a work platform for construction crews.

The first steel deck segment was lifted into place in late 1994. The approach deck segments were constructed in Britain and Dubai and then shipped to Hong Kong for assembling. The main span segments were built by Cleveland Bridge & Engineering Company in the U.K. and by Mitsui in Japan.The climbing cranes used to erect the tower portals were coincidentally also used on the HSBC Main Building a decade earlier, as well as at Canary Wharf in the interim

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