CRTSⅡ型板式无砟轨道抬板维修时轨道板锚固方案研究

Study on anchoring scheme of lifted track slab in repairing of CRTSⅡ slab-type ballastless track

在CRTSⅡ型板式无砟轨道抬板维修时需要解除轨道板间的纵向连接,在存在温度力的情况下解锁纵连钢筋将释放温度应力,引起抬板处两侧的轨道板产生纵向位移,对轨道结构的稳定性不利。为了减少这种影响,抬板前须对两侧相邻的轨道板进行植筋锚固处理。本文应用ANSYS建立轨道板抬板维修计算模型,并对比分析不同植筋锚固方案的效果。研究结果表明:抬板维修时宜对邻侧2块轨道板进行植筋锚固;第1块板宜植筋16根;第2块板在温度变化较大情况下宜植筋16根,在温度变化较小情况下宜植筋8根。

Longitudinal connections between slabs needed to be unlocked while dam aged CRTS Ⅱ Slab-type ballastless track slabs was repaired. Temperature stress should be released while longitudinal connection bars were unlocked in the presence of temperature force. This should induce unlocking slabs longitudinal displacement,and was disadvantaged to the stability of track structure. To reduce this influence,the slabs adjacent that be lifted needed to be anchored by embedded steel bars. A lifted track slab maintenance model was built by using ANSYS to analyze the effects of different anchoring schemes. The results show that the adjacent 2 slabs at each side of the lifted slabs need to be anchored. The first adjacent slab should be embedded 16 bars. The second adjacent slab should be em bedded 16 bars in high ambient temperature and change,while 8 bars in low ambient temperature and change.