大跨度斜拱曲梁多重组合桥梁原理和应用实践

Principle and Application Practice of Multiple Composite Bridge with Long-span Oblique Arch and Curved Beam

摘要:

以广州市海心桥为例，阐述大跨度斜拱曲梁多重组合结构设计原理、构造特点和关键技术。其中钢-混凝土组合空间拱肋、UHPC包裹钢箱混凝土组合拱肋、劲性骨架组合承台、型钢混凝土组合抗推桩和骑跨式组合桥台等创新构造均满足了使用、景观、受力和耐久性等需要。通过分析比较和实践应用，验证了多重组合具有较好的力学特性和使用性能，使该桥成为目前世界上跨度最大、桥面最宽的斜拱曲梁跨江景观人行桥。

Abstract:

Taking Haixin Bridge in Guangzhou as an example, the design principle, structural features and key techniques of multiple composite structure of long-span oblique arch curved beams are expounded, in which the innovative structures such as steel-concrete composite spatial arch rib, UHPC wrapped steel box concrete composite arch rib, rigid skeleton composite base slab, steel reinforced concrete composite push-resistant pile and straddle composite abutment all meet the needs of use, landscape, force and durability. Through analysis, comparison and practical application, it is verified that the multiple combinations have better mechanical characteristics and operational performance, which makes the bridge the longest span and the widest deck of the oblique arch curved beam cross-river landscape footbridge in the world.