The main bridge of Bay Bridge is a prestressed reinforced concrete stiffening girder suspension bridge. The main girder is a single-box three-room olive thin-walled prestressed concrete box girder with a main girder in the middle and cast-in-place auxiliary beams at both ends to connect the two ends. The concrete label is C60. The top plate is prestressed with perforated beam, and the bottom plate is thin. Prestress adopts unbonded steel strand external prestress. Each strand of steel strand is wrapped with PE casing, and the lifting points are located near the lifting holes at both ends of the main girder.
Saddle is composed of upper seat body and bottom plate, which is cast in three parts. The upper seat body is made of ZG35I and fixed on the top of the tower with M68 anchor bolts. The slack cable saddle is installed at the anchor hole; The steel wire bundles of the main cable are dispersed horizontally and vertically through the loose saddle and then connected with the anchor rod, so that the vortex vibration amplitude of the bridge is controlled within 5 mm, which is also the reason why it can resist typhoon.
Introduction of design parameters of bay bridge
Shantou Bay Bridge is located in the sea area of Cocoon Island, at the east entrance of Shantou Port, at the entrance and exit of Shantou Port in the eastern suburb of Shantou City, 5 kilometers away from Shantou City. The bridge starts from the toll station at the intersection of Nanbin Road and Shenhai Expressway in Haojiang District in the south, crosses Zhushihai in the upper part, connects Cocoon Island to Haibin Road in the middle, and reaches the toll station of longhu district Taixing Road Bay Bridge in the north; The whole bridge section is a part of shenyang-haikou expressway.
The total length of Shantou Bay Bridge is 2,500m, in which the main bridge is 96 1.8m and the layout span is 154+452+ 154m. North approach bridge 1 129. 1m, south approach bridge 409.8+0m. The width of the main bridge deck is 24.2m, and the total width of the approach bridge deck is 28.1m. The total width of the main tower is 3 1.2m, and the height is 92m .. The two main cables are each 1030m in length and 0.56m in diameter, and are composed of10/00 galvanized high-strength steel wires with a diameter of 5mm, weighing 15t.
The above contents refer to Baidu Encyclopedia-Bay Bridge.