复杂条件下复合通道节点桥梁多方案比选研究

Comparative Study on Multiple Schemes for Bridges with Composite Channel Joints under Complex Conditions

摘要:

以广佛新干线复合通道项目为背景，介绍了复杂条件下复合通道桥梁节点在设计阶段的3种方案；结合用地范围、景观影响、施工难易、工程造价、社会影响等制约因素，对3种方案进行了对比；针对双层桥中的旧桥是否利用问题，利用有限元软件，对原有桥梁上、下部结构在正常使用状态和承载能力极限状态下的受力进行计算，分析了各个方案的可行性；另外还总结了双层桥节点方案设计过程中的重点，展现了桥梁总体设计思路，为今后相应工程提供了经验和参考。

Abstract:

Taking the Guangzhou-Foshan New Highway Composite Channel Project as the background, three schemes in the design stage of composite channel bridge joints under the complex conditions are introduced. Combined with the constraints such as scope of land use, landscape impact, construction difficulty, engineering cost and social impact, the three schemes are compared. For the problem of whether the old bridge is used in the double-deck bridge, the finite element software is used to calculate the stress of the original bridge superstructure and substructure under the normal service state and the ultimate limit state of bearing capacity. The feasibility of each scheme is analyzed. In addition, the key points in the design process of double-deck bridge joint scheme are summarized, and the overall design ideas of the bridge are explained, which provides the experience and reference for the other engineering projects in the future.