隧道侧部溶洞对 CD 法开挖顺序影响的数值模拟

摘要

结合某高速公路隧道侧部溶洞的具体情况，针对先开挖靠近溶洞侧和先开挖远离溶洞侧两种不同的开挖顺序，利用有限元软件ANSYS和有限差分软件FLAC3D进行数值模拟，分析了两种不同开挖顺序对隧道位移场和应力场的影响，并通过比较得出了最优的开挖顺序。%Combining with the specific circumstances of a highway tunnel side cave,according to two different excavation sequences of first exca-vation near cave side and first excavation away cave side,made numerical simulation using finite element software ANSYS and finite element difference software FLAC3D,analyzed the influence of two different excavation sequences to tunnel displacement field and stress field,through the comparison obtained the optimal excavation sequence.