Abstract：Theoretically speaking, there are two different directions to reduce the vibration induced by the railway transit system. One way is to isolate the vibration by getting lower nature frequency, which was common used in the vibration isolation measures design, while the other is to absorb the vibration by raising the damping, which is rarely researched so far. Based on the principle of energy absorption, the Rubber Concrete Monolithic Roadbed (RCMR) was presented in this paper as a low-cost mitigation measure. The three-dimensional dynamic-finite-element model was employed to analyze the dynamic property subjected to the vibration load of the RCMR in both horseshoe-shaped tunnel and shield tunnel. Calculation results indicated that (1) for the case of the RCMR and the normal concrete material roadbed in the same tunnel structural, the one-third-octave frequency spectrums on the tunnel wall and ground surface were basically the same. (2) the vibration acceleration level of the RCMR was effectively damped, especially in the range of 0~20Hz, which play an important role in contributing to the vibration mitigation for the railway transit system in low frequency range.
