摘要
为解决综合铁路枢纽内多线并行地段增建三四线工程与既有铁路、市政道路、高层建筑聚集区等因素的匹配性问题,基于勘察设计实例,结合沿线重大拆迁聚集区、多条高铁和市政道路,从既有线里程确定、线路总体选线思路、线路重难点工程方案、平面计算方法等方面,对增建三四线线路方案进行综合研究。研究表明,贯通测量以尖轨尖作为既有线里程确定的基础,多线并行地段选择基准线,重新确定相邻线里程;增建三四线采用多次换侧绕避重大拆迁,高层住宅聚集区附近市政道路上跨既有铁路,增建三四线宜下穿市政道路,城市景观好,噪声污染小;线路区间直线地段宜采用最小线间距,曲线加宽一般采用加长内侧线缓和曲线长度的方法完成,困难条件下增大线间距;直线变距与曲线变距适用于绕避桥墩、单点建筑物,曲线换侧与直线换侧适用于绕避既有线附近重大拆迁聚集区。
In order to solve the matching problem between the route of the additional third and fourth line in the lines paralleled section of the comprehensive railway hub and the existing railway,municipal road,high-rise building gathering area and other factors,based on the investigation and design examples,combined with the major demolition gathering areas,several high-speed railways and municipal roads along the line,the research was carried out from the aspects of the determination of the mileage of the existing lines,the overall route selection ideas,the key and difficult engineering schemes of the line,and the plane calculation methods.The research results show that,the switch rail tip could be used as the basis for determining the mileage of the existing line,the reference line in the lines paralleled section should be redetermined as well as the mileage of the adjacent line;The additional third and fourth line should avoid major demolition by constantly changing the position.The municipal roads near the high-rise residential areas shall cross the existing railway considering better urban landscape and less the noise pollution;The minimum line spacing should be adopted in the straight section of the line section.The curve widening is generally completed by lengthening the length of the transition curve of the inner side line.The line spacing should be increased only under limited conditions.The straightline variable distance and curve variable distance are applied to avoid piers and single buildings and the side changing of the curve and straight sections are applicable to avoid demolition gathering areas along the existing line.
作者
朱坤腾
ZHU Kunteng(China Railway Design Corporation,Tianjin 300308,China)
出处
《铁道勘察》
2023年第3期83-88,共6页
Railway Investigation and Surveying
关键词
综合铁路枢纽
基准线
多线并行
三四线
方案研究
comprehensive railway hub
baseline
lines paralleled section
third and fourth line
scheme study
