下承式系杆拱桥由于自身有跨越能力大,建筑高度小等特点,近年来在铁路建设中得到了广泛应用。本文首先对先梁后拱法施工方法进行了概述,然后从系梁施工、钢管拱施工、吊杆安装和调索张拉三个方面进行了分析。 Understopped tied arch bridge because of its ability to span large, small building height and other characteristics, in recent years has been widely used in railway construction. In this paper, the construction methods of the first beam and the back arch method are summarized first, then the three aspects of the tie beam construction, the steel tube arch construction, the boom installation and the retrieval of tension are analyzed.