基于COMSOL的背负式隧道开挖有限元仿真

Finite Element Simulation of Backpack Tunnel Excavation Based on the COMSOL

隧道开挖过程中,双隧道开挖应根据两洞的轴线间距、洞口里程距离、地质条件以及其他自然条件,选择适当的开挖方法,确定好两洞开挖的时间差和距离差,并采取措施防止后行洞开挖对先行洞周壁产生不良影响。故此,以背负式双隧道模式为基础,以COMSOL软件为有限元仿真工具,研究背负式双隧道开挖过程中不同中心距所造成的影响。对隧道开挖具有重要意义。

In the process of tunnel excavation, the proper excavation method should be selected according to the axis distance between the two holes, the mileage distance between tunnel entrances, geological conditions and other natural conditions, and the time difference and distance difference between the two holes should be determined, and measures should be taken to prevent the bad influence of the later tunnel excavation on the surrounding wall of the leading tunnel. Therefore, based on the knapsack double tunnel model, COMSOL software was used as the finite element simulation tool to study the influence of different center distances in the process of knapsack double tunnel excavation. It is of great significance to tunnel excavation.