【摘要】 博山 2号双跨连拱隧道采用三导洞钻爆法施工 ,中导洞超前 ,两侧导洞滞后 ,待中隔墙完成后进行侧导洞扩挖。为保证施工安全 ,采用有限元程序对扩挖过程进行分析 ,得出中隔墙的最大震动速度更多还原

【Abstract】 Boshan No.2 tunnel is a double arch tunnel,it was excavated by drill and blast with three pilots,the middle pilot was first excavated,followed by the lateral pilots which would be enlarged after the middle wall had been built.In order to ensure the safety of middle wall,the blasting vibration effect are analyzed by means of FEM in this paper.更多还原