小角度下穿铁路地道桥线路架空方案设计  

Design of Overhead Line Scheme for Small Angle Undercrossing Railway Tunnel Bridge

作　　者：解瑶 龙利宏 XIE Yao;LONG Lihong(Southwest Jiaotong University Chengdu Design Institute Co.,Ltd.,Chengdu,Sichuan 610031,China;Survey and Design Company of Sichuan Road&Bridge(Group)Co.,Ltd.,Chengdu,Sichuan 610041,China)

机构地区：[1]成都西南交通大学设计研究院有限公司,四川成都610031 [2]四川公路桥梁建设集团有限公司勘察设计分公司,四川成都610041

出　　处：《黑龙江交通科技》2024年第11期120-125,共6页Communications Science and Technology Heilongjiang

摘　　要：在下穿铁路地道桥建设中,为保证既有铁路的通行不受影响,在施工时需要先对既有铁路线进行加固和架空,确保在不影响铁路行车条件下完成地道桥的施工。架空方式合理与否将对整个工程项目的安全、经济、工期产生重大影响。以下穿德天铁路地道桥为例,分别采用D便梁架空线路、门式墩架空线路和铁路线开断后大开挖三种架空方案进行对比设计,分别从设计和施工的角度对三种工法的优缺点进行比较分析,最终得出了对于技术标准低、行车对数少的支线铁路,铁路线开断后大开挖施工是一种相对投入较小,对铁路影响相对较小的工法。In the construction of undercrossing railway tunnel bridges,in order to ensure that the passage of existing railways is not affected,it is necessary to reinforce and overhead the existing railway lines during construction to ensure that the construction of tunnel bridges is completed without affecting the railway traffic conditions.Whether the overhead mode is reasonable or not will have a significant impact on the safety,economy and construction period of the whole project.the tunnel bridge of Detian Railway is taken as an example.The three overhead schemes of D temporary beam overhead line,portal pier overhead line and large excavation after railway line breaking are compared and designed respectively.The advantages and disadvantages of the three methods are compared and analyzed from the perspective of design and construction.Finally,it is concluded that for the branch railway with low technical standards and few driving pairs,the large excavation after railway line breaking is a relatively small investment and relatively small impact on the railway.

关 键 词：地道桥 小角度 铁路线架空 铁路线开断 大开挖 

分 类 号：U442[建筑科学—桥梁与隧道工程]