临近地铁隧道的基坑变形分析

he article analyses the advantages and characteristic of the software FLAC3D. The simulation of excavation and support on a deep pit in Shanghai was carried out using the software FLAC3D. During the simulation, taking the influence of time into account, the Burger-Creep viscoplastic model was adopted and contace elements were applied on the interfaces between the retaining structures and soil. The settlements of ground, deflection of the retaining structures and effect on adjacent tunnels in every step were presented and discussed. The numerical results were basically consistents with the existing literatures, so ifs feasibility was proved. The numerical results provide a useful reference to design and construction of similar deep excavation projects.