Research conclusions: With the trains being-speed up, the transient pressure of double-tracktunnel in the existing railway can not reach the standard of comfort.
研究结论：提速后，我国既有线上一些双线隧道的瞬变压力不能满足旅客乘车的“舒适度”标准。
2
Research methods: Take the double-tracktunnel in the Lanzhou-Wunan for example, the relation graph of train speed and maximum pressure has been simulated and figured out with the formula.
研究目的：通过计算，分析我国双线隧道中存在的瞬变压力问题，并提出相应的缓解措施。
3
Using the continuous elastic double layers beam model of track structure, the forces between the sleepers and the tunnel inlay produced by the running of certain subway train were calculated.