不锯轨更换桥上CRTS Ⅰ型轨道板研究与实践  

Research and Application of CRTS Ⅰ Slab-replacing on Bridge

作　　者：王涛[1] 邵丕彦[1] 李海燕[1] 刘子科[1] 

机构地区：[1]中国铁道科学研究院金属及化学研究所,北京100081

出　　处：《铁道工程学报》2016年第3期39-43,共5页Journal of Railway Engineering Society

基　　金：国家自然科学基金(51408610);中国铁路总公司重大课题(2013G008-A-1)

摘　　要：研究目的:在温度应力、列车动载、风化等综合作用下,个别CRTSⅠ型轨道板出现裂纹、掉块等病害,存在更换轨道板的可能。本文依托未开通运营的新建线路裂损轨道板的更换实例,研究不锯轨条件下更换CRTSⅠ型轨道板的可行性,以期为我国运营线路天窗时间内更换轨道板提供参考。研究结论:(1)采用抬轨方案,依靠常规工装,能克服轨道吊调度不便、桥下便道不通等实际困难,从而避免无缝钢轨切割;(2)主要更换过程为:先松扣件、凿凸台和抬钢轨后,通过板底安放滚轴,侧向抽拉裂损轨道板至线间,顶升后用双向牵引平板车转运至吊装点,经接触网中间吊出,新轨道板按此程序反向操作复位,完成轨道板更换;(3)采用特制工装和相应快硬材料,可大幅缩短作业时间,有望在无砟轨道天窗时间内完成轨道板的更换。Research purposes： Under the comprehensive function of thermal stress, weathering, diseases of individual CRTS I slab appear such as cracked, chip off - falling, new one in the future. Combining with the new railway without operations in which damag vehicle dynamic then it is possible ed slab must to be the process of replacing CRTS I slab was studied in this article, and the results can provide reference for slab track maintenance in our country. load and to replace replaced, ballastless Research conclusions： （ 1 ） The construction plan of rail - lift replacing slab was applied which depended on simple equipment, and overcame some special difficulties, such as track crane unfeasible scheduling, temporary -convenience road ended nearby bridge, to avoid breaking seamless rails. （2） The key steps： freed rail fastening and lift rail firstly, laterally pulled slab away by roller, the slab was raised in middle place between double - track railway, moved to hoisting location by fiat car, and truck crane lifted the slab off the car from the space between double overhead contact system, also, the new slab was repositioned by reverse operating, then, it was the first successful to accomplish slab - replacing. （3） A method for using special equipment and rapid -hardened mortar is proposed, which will greatly reduce construction time, and the process of slab - replacing can be finished during maintenance gap in the future.

关 键 词：CRTS Ⅰ型板式无砟轨道 抬轨 更换 轨道板 

分 类 号：U213.242[交通运输工程—道路与铁道工程]