MaChang Bridge (Hanja: 馬昌大橋) is a cable-stayed bridge connecting from Gapo-dong, Changwon MasanHappo-gu to Gwisan-dong, Changwon Seongsan-gu in Southern Gyeongsang Province. Located at the entrance to Masan Bay, in the south-east of Korea, the bridge allows motorists to avoid the congested motorway that skirts around the bay to Busan, the second largest industrial city in South Korea. The bridge is a part of National Route No. 2 and No. 77 (Southern Coastline Boulevard/Namhaean-daero).
The project features a 740m, cable-stayed bridge with a main span of 400m, side spans of 175m and two 164m-high, H-shaped pylons. The bridge deck is composite, consisting of concrete slab on steel plate girders. Stay cables of the parallel wire system were fabricated by Shanghai Pujiang Cable Company in China. The cable-stayed bridge also has VSL mono-strand cables inside the end piers that function as a tie-down system. This transfers the negative reaction at the ends of the side spans to pre-stressing tendons and the concrete in pier shafts and pile caps.
The construction of the bridge was commenced in April 2004 and completed in June 2008. The bridge provides a vital link across Masan Bay and is expected to alleviate severe traffic congestion in the cities of Masan and Central-Changwon Districts as an alternative route for travel between Korea’s two southern provinces, Southern Jeolla and Southern Gyeongsang. MaChang Bridge can shorten the commute between the two affluent districts of Changwon by 30 minutes.
A French Construction Firm, Bouygues Travaux Publics with its local partner, Hyundai Engineering and Construction (현대건설), delivered this extraordinary project through a concession contract including design, construction and operation for a period of 30 years. The structure consists of a 740-metre cable-stay bridge crossing Masan Bay with a 400-metre steel main span topped with a concrete deck and suspended by lateral planes of stays.
There are also two approach viaducts:
- One 410 metres long with a variable depth steel box-girder with spans of 145 metres, 160 metres and 105 metres;
- The other, 550 metres long, is a composite steel box-girder/concrete structure with spans of between 50 and 70 metres.