EVALUATION OF THE VIBRATION OF NEWLY-BUILT FLOATING SLAB TRACK ON EXISTING SUBWAY STRUCTURES

With the fast development of Urban Rail Transit (URT), the effects on surrounding environment are attached more and more importance than before in the traffic planning. Regarding Urban Rail Transit, it is highly likely that two adjacent lines are not developed at one time. So it is necessary to evaluate the vibration characteristics of the newly built line and optimize the development according to the evaluation results and adopt some vibration and noise reduction measures. Floating slab track is the most commonly-used vibration and noise reduction measure. A three-dimensional finite model and a two-dimensional tunnel-soil model are established in this paper to study the effect of newly-built urban rail line's operation on the vibration of existing URT structure (vibration reduction effects with different parameters are also considered), the conclusions have some value for the design and construction of the newly built line.