神朔线三机集中牵引单元万吨列车条件下线桥适应性试验研究  

Experimental study on adaptability of line and bridge on Daliuta-Shuozhou railway to pulling train(ten thousand tons) using three locomotives centralized traction

作　　者：张雯[1] 

机构地区：[1]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《铁道建筑》2015年第8期5-9,共5页Railway Engineering

基　　金：国家科技支撑计划(2013BAG20B01)

摘　　要：采用三机集中(以下简称3+0)牵引单元万吨列车与分散牵引相比可显著提高站场作业效率。通过在神朔线选取小半径曲线和长大坡道的轨道结构和典型桥梁,试验研究了在神华号机车3+0牵引万吨列车条件下线桥动力性能。结果表明:实测轨道结构的脱轨系数、轮重减载率、轮轴横向力等安全参数和钢轨横向位移、轨距扩大量等轨道结构稳定性参数均在安全限值和允许范围内;梁体横向和竖向动力响应满足规定要求;与运营货车相比,线桥各参数实测值无明显变大,可以常态化开行集中牵引单元万吨列车,但须对小半径曲线(曲线半径≤500 m)、连续曲线及长大坡道地段的线桥状态加以监测。Compared with decentralized traction, three locomotive centralized traction （hereinafter using abbreviation 3 ＋ 0 ） of 10 000 t trains can significantly improve the efficiency of station yard. The dynamic performance of track structure and bridge was tested on typical bridges located at sharp curves and long steep grades,loaded with Shenhua locomotives 3 ＋ 0 hauling 10 000 t trains. The results show that the track structure safety parameters （P/Q ratio, reduction rate of wheel load, lateral axle load and etc.） are below the limits and stability parameters （lateral rail displacement, gage widen and etc.） are within the allowable range. The lateral and vertical dynamic response of bridge girders meet the requirements. The measured parameter values of track and bridge have no obvious difference comparing with those values while loaded with common vehicles. Thus, 10 000 t trains with centralized traction is acceptable to the current bridge and track structure. However, the track and bridge located at specific sharp curves （curve radius not larger than 500 m） ,continuous curves or long steep grade shall be observed and monitiored.

关 键 词：轨道结构 桥梁 集中牵引 试验研究 

分 类 号：U211.8[交通运输工程—道路与铁道工程] U441.3[建筑科学—桥梁与隧道工程]