水平层状岩体连拱隧道施工数值模拟与现场实测

Numerical simulation and field measurement of double-arch tunnel in horizontal layered rock masses

针对水平层状岩体火麻冲连拱隧道,考虑不同强度岩层组成的软硬互层岩体,利用数值模拟手段进行隧道施工全过程分析。结合现场实测,探讨了水平层状岩体条件下连拱隧道围岩与支护结构变形受力特点。指出连拱隧道结构设计与施工过程的薄弱环节,可为相关工程提供参考。

By using numerical simulation method, the whole construction steps of Huomachong double-arch tunnel which located in the horizontal layered surrounding rock masses were analyzed. The simulation has considered the interbed layered rock masses with different strength. Combined with field measurement, the characteristics of deformation and stress of double - arch tunnel on horizontal layered surrounding rock masses were investigated. Meanwhile, the vulnerable spot of structure design and construction process were pointed out. The obtained regulations can utilize to others similar constructions.