郑万铁路奉节梅溪河双线特大桥主桥结构设计与施工
摘要：郑万铁路奉节梅溪河双线特大桥主桥设计为1-340m劲性骨架钢筋混凝土上承式提篮拱桥，拱座采用水平桩+竖直桩分离式嵌固基础，X形钢管混凝土劲性骨架+外包混凝土拱圈结构，拱座交界墩为双柱式空心墩，拱上11根立柱及3联连续梁。设计150t缆索吊机吊装钢拱肋节段及辅助后续施工，采用斜拉扣挂法安装钢拱肋。本桥结构设计复杂，具有较多施工难点。
关键词：桥梁工程拱桥桩劲性骨架结构设计施工技术
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参考文献[1] 中国中铁二院工程集团有限责任公司．新建铁路郑州至万州线重庆段4标桥梁设计图(DK705+041. 00奉节梅溪河双线特大桥第一册至第七册)[Z].2016.
[2] 宋随弟，马庭林，郭伦波，等．渝黔铁路夜郎河大桥主桥设计关键技术[J]．桥梁建设，2017,47(5):89-94.
[3] 詹建辉，张铭，张家元．宜昌香溪长江公路大桥主桥设计[J]．桥梁建设，2017,47(3):7-12.
[4] 陈让利．沪昆客专北盘江特大桥设计与施工方案[J]．科技情报开发与经济，2011,21(22):175-179.
[2] 宋随弟，马庭林，郭伦波，等．渝黔铁路夜郎河大桥主桥设计关键技术[J]．桥梁建设，2017,47(5):89-94.
[3] 詹建辉，张铭，张家元．宜昌香溪长江公路大桥主桥设计[J]．桥梁建设，2017,47(3):7-12.
[4] 陈让利．沪昆客专北盘江特大桥设计与施工方案[J]．科技情报开发与经济，2011,21(22):175-179.
Structure Design and Construction of Main Bridge of Meixi River Double-track Super Large Bridge on Zhengzhou-Wanzhou Railway
Abstract: The main bridge of Fengjie Meixi River Double-track Super Large Bridge of ZhengzhouWanzhou Railway is designed as a stiff skeleton reinforced concrete deck type basket handle arch bridge with a main span of 340 m,the abutment adopts horizontal pile + vertical pile separation embedded foundation,X-shaped concrete-filled steel tubular stiff skeleton + externally wrapped concrete arch ring structure,abutment juncture pier is double column hollow pier,11 columns and triple continuous beams on the arch.The 150 t cable crane is designed to lift the steel arch rib section and assist the subsequent construction,installation of steel arch rib by cable-stayed buckle method. The structure design of the bridge is complex,and which has many construction difficulties.
Keywords: bridges; arch bridges; piles; stiff skeleton; structure design; construction
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