针对我国西南地区铁路客运专线多山、多隧道,运架设备需要满足隧道口架梁、隧道内运输箱梁和托运架桥机等特殊工况的施工。作为与架桥机配合施工的900t过隧道运梁车,在总体设计上需考虑隧道内外的各种工况,本文就其结构特点和过隧道方案进行介绍。 Aiming at the mountainous, multi-tunnel and transporting equipment of railway passenger dedicated railway line in Southwest China, it is necessary to meet the construction of special conditions such as tunnel girder, inner box girder and bridge girder. As a 900t tunneling beam girder cooperating with bridge erecting machine, all kinds of working conditions inside and outside the tunnel should be considered in the overall design. This paper introduces the structural features and tunneling scheme.