某立交两层交叉钢混凝土组合梁的设计计算

Design and Calculation on Two Layers of Cross Steel Concrete Composite Beams of an Interchange

钢混凝土组合梁由于其较强的跨越能力、施工期间对桥下道路交通影响小的特点在立交工程中得到了广泛应用。在深圳地区某立交工程中,由于受桥下已有道路限制及立交线形需要,需设置两层交叉的钢混凝土组合梁跨越已有道路,设计难度较大,经过多方案的计算分析,利用上下两层钢混凝土组合梁的施工顺序的合理安排,既确保了结构安全又缩短了施工工期。

The steel concrete composite beam is widely used in the interchange projects because of its stronger spanning capacity,and its small influence on the road traffic under the interchange during the construction.In an interchange project of Shenzhen,it is required to set up two layers of cross steel concrete composite beams to span the existing roads owing to the limitation of the existing roads under the interchange and the requirement of the interchange alignment.Its design is more difficult.After the calculation and analysis of many schemes,the construction sequence of two upper and lower layers of cross steel concrete composite beams is reasonably arranged not only to ensure the structure safety,but also to shorten the construction period.