中文摘要：

为了解决高速铁路轨道机械绝缘节的烧损问题,并优化高铁站内回流疏导方案,根据对杭长线长沙南站内绝缘节电位差的实地测试数据,从机械绝缘节的设置点、牵引电流回流疏导设置等方面,提出一种高速铁路站内机械绝缘节烧损问题的解决方案.分析了该方案的可行性原理,结合现场测试数据进行了验证.试验数据表明：提出的方案能够有效降低机械绝缘节两端的电位差,改善机械绝缘节烧损问题.

英文摘要：

Based on the test data in Changsha south station of Hangzhou-Changsha railway,this paper analysed the settings of mechanical insulating joints locations and traction current divert optimizing,which was the solution for the burning and damage phenomenon of mechanical insulating joint. It also analyzed the feasibility,and verified it combining with experimental test data.