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京石客运专线石家庄隧道是中国第一条穿城入地多线双连拱浅埋大跨铁路隧道。该文依托下穿既有石太客运专线的浅埋大跨双连拱隧道暗挖段,考虑不同工法、不同超前加固措施等因素,利用Midas-Gts有限元软件分别对不同工况进行模拟,分析既有线变位、新建隧道结构受力以及塑性区发展深度,提出合理的穿越方案。
Beijing-Shijiazhuang Passenger Dedicated Railway Tunnel is the first in China to wear multi-line double-arch shallow-buried long-span railway tunnel. Based on the factors such as different workmanship and different advanced reinforcement measures, this paper relies on the Midas-Gts finite element software to simulate different working conditions, Analysis of displacement of existing lines, the force of new tunnel structure and the development of plastic zone, put forward a reasonable crossing plan.