摘要
为保证工程安全性,武汉市轨道交通7号线一期工程三阳路公铁两用过长江隧道需利用轨道梁间空隙作为废水泵房集水池。通过对轨道梁构造措施进行优化设计及结构受力分析检算,解决轨道梁稳定性技术问题,并完成轨道梁结构设计及相关专业接口设计。结果表明:通过延伸轨道梁两侧长度,增设横梁等构造措施及设置隧道管片植筋可保证轨道梁的稳定性及列车水平荷载有效传递;轨道梁作为弯拉构件,设计荷载应考虑列车荷载及混凝土收缩影响进行配筋设计,纵向钢筋配筋率应不小于0.25%,横向钢筋配筋率不小于0.2%;轨道梁区别于一般整体道床接口设计,应着重考虑与隧道、给排水系统、杂散电流、接触轨等专业的接口设计,并保证后期运营期间的安全防护。
For the safety of the project,the space between track beam is used as collecting basin of wastewater pumping station in the rail-and-road river-crossing tunnel of Wuhan Metro Line 7 on Sanyang Road.This paper intends to solve the technical problem of the stability of the track beam and complete the structure design of the track beam and the relevant professional interface design based on the optimization design of track beam and the calculation of structure stress.The results show that the stability of track beam and the effective transmission of horizontal load of the train can be ensured by means of extending the length of track beam,adding crossbeam and planting reinforcing bars in the tunnel segments.The track beam should be designed as a bending and pulling component with the consideration of the train load and the effect of concrete shrinkage.The longitudinal reinforcement ratio should not be less than 0.25%,and the transverse reinforcement ratio should not be less than 0.2%.The interface design of track beam is different from that of the general ballastless track.The design of interfaces with professions such as tunnel,water supply and drainage system,stray current,and contact rail should be considered emphatically,and the safety protection during later operation period should be ensured.
作者
张珍珍
ZHANG Zhenzhen(China Railway siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)
出处
《铁道标准设计》
北大核心
2021年第1期51-54,共4页
Railway Standard Design
关键词
公铁(轨)两用隧道
轨道梁
结构设计
稳定性
植筋
专业接口
rail-and-road tunnel
track beam
structure design
stability
planting reinforcing bar
professional interface
