NanyangXinchang Ocean City Pedestrian Overpass Project
The Xinchang Ocean City pedestrian overpass spans Gushan West Road at a 90-degree intersection. On the north side, it connects to the commercial center of Plot A, while on the south side, it links to the commercial center of Plot B, serving as a vital link between the two.
The main girder of the overpass adopts a continuous steel box-girder structure with spans of (5.6 + 16.92 + 21.0 + 12.86 + 5.6) meters. The girder is 4.0 meters wide, featuring a single-box, single-cell cross-section with a height of 0.7 meters. Transverse diaphragms are spaced at regular intervals of 1.5 meters, and a stairwell landing along with a reserved elevator platform are installed 4.55 meters from each end of the girder; these platforms measure 1.5 meters in length. The main piers are rigidly connected to the main girders, with steel plates at the pier tops aligned longitudinally with the girder’s transverse diaphragms, and stiffening ribs provided transversely across the pier top. The main piers are constructed as steel box structures, filled internally with micro-expanding concrete, measuring 2.0 meters in width and shaped like a lotus flower, with their external appearance defined by transverse steel plates on the outer sides of the piers.
All major structural components of the overpass are fabricated from Q345qC all-welded steel. All steel connections utilize full‑penetration double‑sided fillet welds, and the steel members are prefabricated at Zhejiang Yuegong Steel Structure Co., Ltd.’s factory before being assembled on site in segments.
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