跨海湾高速铁路接触网工程关键技术与应用

Key Technologies and Applications of Overhead Contact System for Cross-bay High-speed Railway

跨海湾区域的海洋性气候明显,接触网在跨海湾长大桥梁上沿线架设,裸露在外且无备用,时刻承受强台风、强腐蚀盐雾以及大跨度桥梁伸缩、位移等恶劣环境及工程条件的考验,面临着诸多困难和挑战。本文结合我国东南沿海高速铁路的建设与运营经验,基于接触网服役特性,分别从强台风、强腐蚀及大跨度桥梁等服役环境方面,研究接触网防风、防腐蚀以及与大跨度桥梁伸缩、位移相适配的系列关键技术,并提出针对性措施及解决方案,为沿海电气化铁路的建造和运营维护提供指导。

In coastal regions spanning bays,the marine climate is prominent,and the overhead contact system,installed along lengthy sea-crossing bridges with no redundancy,is constantly exposed to severe conditions such as strong typhoons,intense corrosion from salt spray,and the expansion,contraction,and displacement of the long-span bridge.These challenging circumstances pose numerous difficulties and obstacles for the overhead contact system.Based on the construction and operational experience of southeast coastal high-speed railways in China,this paper,grounded in the service characteristics of the overhead contact system,investigated a series of critical technologies addressing wind resistance,corrosion prevention,and compatibility with expansion,contraction,and displacement mechanisms of longspan bridges,and examined the challenges posed by strong typhoons,severe corrosion,and the unique environments presented by long-span bridge structures.Furthermore,it proposed targeted,specific measures and solutions for these issues to guide the construction and maintenance of coastal electrified railway systems.