The Excavation Simulation of Underground Railway Station Engineering with ABAQUS

Based on the new Beijing-Zhangjiakou Railway underground stations Badaling section of triune-arch structure, the most shallow beried-depth of station vault is 75m, the span up to 43.83m, height of 21.73m, cross-section area of 857.1026 m(2), such a large span structure in the China is the first case, the similar project in foreign countries are extremely rare, rare in the world. In order to explore the stability of surrounding rock may occur in the construction process, it is necessary that the numerical simulation analysis for rock status before construction, the paper use the advanced large-scale non-linear finite element software ABAQUS for underground railway station engineering excavation process simulation analysis,In the excavation process, using double rock column excavation methods, supporting rapid method, simulation results show that the rock stress did not exceed its yield stress, the largest settlements of vault were reasonable within the limits prescribed, the double rock column supporting method is a good excavation role for the large span surrounding rock excavation,and indicating the design is reasonable, simulation analysis is essential to the application of underground railway station engineering.