一、前言京广线北京至郑州段电气化工程是目前国内既有线电气化改造设计标准较高的一条线路。从设计标准、设备选型、零部件引进诸多方面都有新的突破。尤其在接触网工程中首次采用整体吊弦是前所未有的。高标准的设计为实现“高可靠,少维修和安全高效”的目标创造了条件,为电气化工程质量上台阶奠定了基础。京郑段正线采用整体吊弦,这种吊弦由机械性能高、耐腐蚀性强的铜合金绞线组成,吊弦线与线夹改用压接工艺连接,具 First, the preface Beijing-Guangzhou line Beijing to Zhengzhou section of electrification project is the existing line of electrification of existing design standards for a higher line. From the design standards, equipment selection, parts introduction many new breakthroughs. Especially in the catenary project for the first time using the overall lifting string is unprecedented. High standards of design to create a “high reliability, less maintenance and efficient safety,” the goal of creating the conditions for the quality of electrical engineering laid the foundation for the stage. Jing Zheng section is the overall use of the whole string, this string by the mechanical properties of high corrosion resistance of copper alloy strands, hanging strings and clamps connected with the crimping process, with