Research On The Risk Control Of The Engineering That A New Subway Tunnel Closely Traverses Under An Existing Subway Station

The engineering that a new tunnel cross over at the bottom of the existing subway station is very dangerous, the construction of the new tunnel will lead to large deformation of the existing subway station, which significantly influences the operation safety of train. Therefore, we are urgent to further study the deformation control measures of this kind of engineering and the influence that the operation of train suffers from the track deformation. Based on the some typical engineering projects in Beijing, by three kind of finite element software: ANSYS, PLAXIS and ABAQUS, this paper build some coupling numerical analysis models, and combine some monitoring data, then to research the ability that different kinds of deformation control measures control the deformation of existing subway station, and to clarify how the track irregularity influences the safety of train operation. As follow, the main research contents in this paper include three aspects:(1)By ANSYS, build three-dimensional finite element model, focus on different deformation control measures respectively, research the Deformation distribution of the existing subway station.(2)By PLAXIS, build two-dimensional seepage-consolidation coupling model, research the deformation of the existing subway station due to the influence of dewatering.(3)By ABAQUS, build three-dimensional finite element dynamic model, combine theoretical calculating formula, research how the track irregularity due to the construction of the new tunnel influences the wheel-track force.