Bornitz模型在铁路路堑段振动预测中的适用性分析

为了分析Bornitz模型在列车通过路堑段引起的地面环境振动预测中的适用性，对郑西客高速铁路某路堑段的环境振动进行了现场测试，利用测试结果反算Bornitz预测模型中的场地衰减系数。根据不同测点得到的衰减系数的离散程度，分析了Bornitz模型对路堑段环境振动的预测精度。由此表明Bornitz预测模型可以反映路堑段地面环境振动的衰减规律，但对振源附近地面环境振动的预测精度较差，而随着离振源距离的增大其预测精度即可逐渐提高，并将能适用于远场地面环境振动的预测。

Applicability Analysis of Bornitz Model for Predicting Environmental Vibration Induced by Train Moving on Subgrade Cutting

In order to investigate the applicability of Bornitz model on predicting the environmental vibration induced by train moving on the subgrade of cutting, the environmental vibration was tested in Zhengzhou-xi’an high-speed railway. Use the measuring results to calculate the field attenuation coefficient of Bornitz prediction model. Analysis the prediction precision of Bornitz model on predicting environmental vibration based on attenuation coefficient’s discrete degree. The result shows that Bornitz model can present attenuation law of environmental vibration in general but it has low precision to predict the environmental vibration nearby vibration source, the prediction precision increase with the increasing distance away from vibration source. The prediction model is suitable for predicting the environmental vibration in the site far away from vibration source.