珠三角城际轨道交通简支箱梁设计

Design on Simply-Supported Box Beam in Pearl River Delta Intercity Rail Transit

城际轨道交通是联系城市群间的快速铁路客运专线,主要满足经济发达的人口稠密地区中短途旅客运输需要,对景观设计要求较高。珠三角城际轨道交通桥梁形式采用了流线形箱梁,在箱梁外侧设置大圆弧,小曲线的梁端加宽等处理更加体现了城际轨道交通桥梁中景观设计要素。其常用简支箱梁根据线间距变化,设计分为双线箱梁、单线箱梁和组合箱梁3种形式。从箱梁设计的技术标准、桥面布置、截面选型等方面进行介绍。

In developed and populous areas,the intercity rail transit is the rapid passenger-dedicated line of urban agglomeration in order to meet the needs of passenger traffic within middle distance and short distance,with the higher requirements on landscape.So the box beam bridges with streamline shape were employed in Pearl River Delta Intercity Rail Transit,in which the large arc shape was utilized along the lateral surface of the box beam,and the girder ends on sharp curve were widened to reflect more landscape elements of intercity rail transit bridge design.Moreover,in the design,according to the various distances between the track centers,the usual simply-supported box beam s were divided into three types: the box beam with double tracks,box beam with single track,and the composite box beam.The technical standards,bridge deck arrangement,cross-section selection and other aspects in box beam design are introduced in this paper.