关于高架段钢铝接触轨锚段伸缩量的研究  

Researches of Expansion Quantity of Steel-aluminum Third Rail Overlap Section at Viaduct Section

作　　者：周韬 ZHOU Tao

机构地区：[1]重庆市轨道交通设计研究院

出　　处：《电气化铁道》2020年第2期64-68,共5页Electric Railway

摘　　要：接触轨伸缩量是接触轨膨胀接头选型的重要参数,高架段接触轨系统的锚段伸缩量受多因素影响,与地下段相比受外部土建因素影响大。本文分析了高架段接触轨本体温升及高架桥外部因素2方面对锚段伸缩的影响,给出高架段接触轨锚段伸缩量受内外部因素影响占比情况,为高架段接触轨锚段长度与膨胀接头匹配设计提供参考。The expansion quantity is an important parameter for type selection of third rail expansion joint,the overlap section expansion quantity of the third rail system in viaduct section is liable to influences by other factors,especially by the external factor of civil construction contrasting with that of underground sections.The paper analyzes the influences to the overlap section expansion quantity by two factors of third rail main body temperature-rise and viaduct bridges,puts forward conditions of percent of influences to the expansion quantity of third rail at viaduct section,providing references for design of matching between overlap section and expansion joint at viaduct section.

关 键 词：钢铝复合接触轨 伸缩膨胀量 膨胀接头 

分 类 号：U231.8[交通运输工程—道路与铁道工程]