Environmental Vibration Isolation Tests and Analysis on Steel Spring Floating Slab Track Used in Subway
Steel spring floating slab track is one of the main vibration reduction measures used in Chinas urban rail transport, to study the vibration reduction results and laws , the operating metro -induced ground vertical vibration tests of the floating slab track points and the normal integrated bal -lastless points in Beijing metro line 5 Dengshikou and Dongsi interval have been performed , as time history and the one third octave band spectrums have been analyzed. The results show that the damping effect of the steel spring floating slab track on the top of the tunnel can reach 13. 1 dB to 14. 3dB,the steel spring floating slab track can not decrease the vibration which frequency is lower than lOHz. The domain dynamic response frequency of the ground -borne vibration is 12. 5 Hz and the vibration energy mainly spreads over 10 Hz to 20 Hz in which frequency band steel spring slab track shows the best damping property. Finally, this paper validates the practicability of the vibration prediction mode specified in the guide of the environmental impact assessment on the urban rail transport system by comparing the calculated data and the field measured data.
Chenglong SUN Liang GAO Jun MA
School of Civil Engineering ,Beijing Jiaotong University ,Beijing 100044,China Energy Saving & Envir Energy Saving & Environmental Protection & Occupational Safety and Health Research Institute , China School of Civil Engineering ,Beijing Jiaotong University ,Beijing 100044,China
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
836-842
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）