摘要
本文针对既有国内外嵌入式轨道存在轨距固定难、无缝线路温度稳定性不够好、轨道板翘曲、维修难、建设费用高、施工速度慢等缺点,研发了一款综合现有嵌入式道床结构优点,同时避免了上述缺点的新型嵌入式道床结构。新型嵌入式道床结构由道床板、槽型钢轨、定位装置密封套、螺栓、轨距调整块、多孔自密实混凝土、纵向连接孔组成。板下和底座各有2条纵向凹槽,中间填充袋装自密实砂浆,两板通过螺杆连接。为了验证新型道床结构力学稳定性,仿真建造了一块1∶1道床。通过推力试验,检验道床横向抵抗力和对钢轨的纵向板约束力。试验结果表明,新型嵌入式道床横向抵抗力大于198 k N,钢轨的纵向约束力大于93 k N,完全满足任何地段的使用要求。
A new embedded ballast structure is researched and developed in the paper, which combining the advantagesof the existing structure and overcomes the shortcomings of existing structure such as the slow construction speed, lowaccuracy, running vibration noise and the difficulty in maintenance. The new type of embedded ballast structure consistsof ballast bed, channel rail, gauge adjusting block and porous self-compacting concrete. The bottom plate and the baseare respectively with two longitudinal grooves, which are filled with the bagging self compacting mortar. The screwsconnect the two plates. In order to verify the dynamic stability of the new structure, the simulation ballast is constructedwith a scale of 1 ： 1. Through the thrust test to check lateral resistance and longitudinal resistance of the ballast, it showsthat when the lateral resistance is greater than 198kN, the longitudinal resistance is greater than 93kN, which fullymeets the use requirement of curve with small radius and any section.
出处
《高速铁路技术》
2016年第6期44-47,共4页
High Speed Railway Technology
基金
四川省科技支撑计划项目(2014GZ0081)
关键词
新型
嵌入式轨道
试验
a new type
embedded track
test
