组合工便梁在既有线框构桥顶进施工中的应用  

The Application of Combined I-Beam Jacking Construction on the Existing Frame Structure Bridge

作　　者：张永全[1] 夏龙[1] 

机构地区：[1]中铁一局集团第五工程有限公司,宝鸡721006

出　　处：《北方交通》2014年第2期1-5,共5页Northern Communications

摘　　要：在铁路既有线的框构桥顶进施工中,线路加固方式受框构跨度、限界及限速等条件约束。根据1-9.0m框构桥顶进施工的实例,结合D型便梁和吊轨横抬梁的特点,设计并采用了组合工便梁法进行线路加固,由于该加固体系受约束条件少适应范围大,故对其结构组成、主要构件设计检算、施工顺序及技术要点等进行介绍,便于类似工程参考和比选。In the jacking construction of railway existing frame structure bridge, the circuit reinforcement methods are limited by conditions such as frame structure span, range limit and speed limit. According to 1 -9. Om frame structure bridge jacking construction and with the features of D - type girder and overhead horizontal beams, combined I -beam are designed and used to reinforce the circuit. Because the reinforcement system has a wide adaptive norm with few constraint conditions, its structural compositions, design and check of primary members, construction sequence and technical points are introduced in order to give a reference and comparison to relevant projects.

关 键 词：铁路既有线 线路加固 线路架空 组合工便梁 框构桥 顶进 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]