Bridges Construction
The Russky Bridge is a cable-stayed bridge in Vladivostok, Primorsky Krai, Russia. The bridge connects the Russky Island and the Muravyov-Amursky Peninsula sections of the city across the Eastern Bosphorus strait, and with a central span of 1,104 metres (3,622 feet) it is the longest cable-stayed bridge in the world. The Russky Bridge was originally built to serve the 2012 Asia-Pacific Economic Cooperation conference hosted at the Far Eastern Federal University campus on Russky Island. It was completed in July 2012 and opened by Prime Minister Dmitry Medvedev, and on September 3, 2012, the bridge was officially given its name.
The bridge to Russky Island is the world's longest cable-stayed bridge, with a 1104 m long central span. The bridge also has the second highest pylons after the Millau Viaduct and the longest cable stays. The design of the bridge crossing has been determined on the basis of two primary factors:
-Shortest coast-to-coast distance in the bridge crossing location 1460 m. Navigable channel depth is up to 50 m.
-The locality of the bridge crossing construction site is characterized by severe climate conditions: temperatures vary from -31 °C to 37 °C; storms bring winds of up to 36 m/s and waves of up to 6 m in height; and ice formations in winter can be up to 70 cm thick.
The piles were driven as deep as 77 m (253 ft) below ground and on the island side 120 auger piles were piled under each of the two 320 m (1,050 ft) high bridge towers. The pylons were concreted using custom self-climbing forms in pours of 4.5 m (15 ft). A crane was used on the first three pours, afterwards the formwork was completed unaided moving through the hydraulic motion of modular elements. The pylons are A-shaped, therefore, the use of standard forms was not feasible. An individual set of forms was arranged for each bridge tower.
Transition between section types was carried out at summer levels at the elevations of 66.26 m (217.4 ft) and 191.48 m (628.2 ft). The use of self-climbing forms made it possible to achieve better quality and decrease the time of construction of cast-in-situ reinforced concrete structures by half as much again. The cable stays anchorage zone starts at 197.5 m (648 ft). The installation of cable stay pairs and casting of bridge tower bodies was carried out simultaneously, dramatically reducing the construction period. More details
-Shortest coast-to-coast distance in the bridge crossing location 1460 m. Navigable channel depth is up to 50 m.
-The locality of the bridge crossing construction site is characterized by severe climate conditions: temperatures vary from -31 °C to 37 °C; storms bring winds of up to 36 m/s and waves of up to 6 m in height; and ice formations in winter can be up to 70 cm thick.
The piles were driven as deep as 77 m (253 ft) below ground and on the island side 120 auger piles were piled under each of the two 320 m (1,050 ft) high bridge towers. The pylons were concreted using custom self-climbing forms in pours of 4.5 m (15 ft). A crane was used on the first three pours, afterwards the formwork was completed unaided moving through the hydraulic motion of modular elements. The pylons are A-shaped, therefore, the use of standard forms was not feasible. An individual set of forms was arranged for each bridge tower.
