Prediction of Low Frequency Ground Vibrations from Underground Tracks in Laboratory
Based on the low frequency vibration tests on a direct -fixation -fastener track (DFT) and a steel spring floating slab track (SSFST) in an underground laboratory in Beijing Jiaotong University , the coupled DFT-tunnel-soil and SSFST-tunnel-soil models are respectively established to further predict the low frequency ground vibrations , using the three-dimensional finite element method. In the numerical models,the discrete excitation frequencies (1,2,... ,20 Hz)and the variable embedded depths(10,18,30 m)of the tracks are considered. Using the regression analysis method ,a prediction formula for vertical and horizontal low frequency ground vibration acceleration levels is de -rived,where the continuous excitation frequencies (1 ~20 Hz) ,the unbroken horizontal distances (0～100 m)to the track and the continuous embedded depths (10～30 m) of the track are all involved. The predicted vibration acceleration levels agree well with the test results. This study could be used as a reference for mitigating the low frequency ground vibrations due to metro operation.
Deyun DING Weining LIU Meng MA Kefei LI
School of Civil Engineering ,Beijing Jiaotong University ,Beijing 100044,China Beijing Urban Enginee School of Civil Engineering ,Beijing Jiaotong University ,Beijing 100044,China School of Civil Engineering ,Beijing Jiaotong University ,Beijing 100044,China Section of Road and R
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
68-77
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）