悬臂下置的悬浇连续箱梁桥设计实践

Design Practice of Cast-in-cantilever Continuous Box Beam Bridge of Low-installed Cantilever

为解决行人与非机动车道纵坡无法满足设计规范要求的问题,提出了一种将悬臂设置在腹板中下部的悬臂浇筑预应力混凝土连续箱梁结构,该悬臂专门用作行人与非机动车通行。对该结构进行详细的整体与细部计算分析,结果表明其受力与常规断面箱梁差别较大。最后对挂篮进行空间受力计算分析。有关成果供设计同行参考。

In order to solve the problem of pedestrian and non-motored vehicle lane longitudinal slope hard to satisfy the design standards and requirements, the article describes a cast-in-cantilever pre-stressed concrete continuous box beam structure with a cantilever installed at the lower of web. This cantilever is specially used for the traffic of pedestrian and non-motored vehicle. The article analyzes the integral and detail calculations.The result shows that its stress is greater different from the conventional section box beam. The article calculates and analyzes the space stress of form traveler. The relative experience can be referred for the similar projects.