【摘要】 以福建南平狮子山隧道为依托,通过MIDAS/GTS有限元程序对不同二衬厚度情况下后行隧道爆破时先行隧道二衬的振速及衬砌应力进行了数值模拟。结果表明,迎爆侧拱腰处其X方向,即水平并垂直隧道轴线方向振速最大;随着二衬厚度的增加,最大振速在一定程度上逐渐减小,二衬X方向上的最大应力却基本不变。更多还原

【Abstract】 The background of this paper is Shizishan Tunnel in Nanping,Fujian Province.By the MIDAS / GTS procedures,under different thickness of secondary lining,the blasting vibration velocity and lining stress of secondary lining of previous tunnel was simulated during blasting of current tunnel.The results show that close to the blasting side of the arch waist at the X direction,i.e.the horizontal and perpendicular to tunnel axis direction,the vibration velocity is the most;with increase of secondary lining thickness,the maximum velocity gradually decreases to a certain extent,but at the X direction the maximum stress of secondary lining is basically unchanged.更多还原