宜昌至喜长江大桥设计特点及关键技术

Design Characteristics & Key Technologies of Zhixi Yangtze River Bridge in Yichang

宜昌至喜长江大桥的大江桥采用单跨838 m钢混结合梁悬索桥,三江桥采用(39+73+210+56)m中央索面高低塔混凝土斜拉桥。主缆、吊索、斜拉索均采用锌铝合金镀层钢丝;大江桥主梁采用钢混结合梁;三江桥主梁为超宽钢筋混凝土箱梁,最大宽度47.5 m;地下连续墙基础采用多种设备相结合的成槽方案。针对环保要求,采用一跨过江、定向照射路灯、雨污水收集系统等措施。

Zhixi Yangtze River Bridge in Yichang adopts single-span suspension bridge with 838m steel-concrete combined beam,and Sanjiang Bridge adopts(39+73+210+56)m high & low tower concrete cable-stayed bridge with central cable plane.Main cables,suspension cables and cablestayed cables are all made of zinc aluminum alloy coated steel wires;main beams of Dajiang Bridge are made of steel-concrete composite beams;main girders of Sanjiang Bridge are super-wide reinforced concrete box girders with a maximum width of 47.5m;underground diaphragm wall foundations are grooved by a combination of various equipment.To meet the environmental protection requirements,measures such as single span crossing the river,directional illumination of street lights,rainwater&sewage collection system are adopted.