中文摘要：

采用有限元动力学软件ANSYS／LS-DYNA对公路路基模型作了数值模拟，对模型中含有空洞时不同测线所测得的频散曲线差异进行了分析，提出了现场检测通过改变测线的方法可以确定空洞的纵向与横向位置的方法。

英文摘要：

This article uses finite element dynamics software ANSYS/LSDYNA to make the numerical simulation to the highway roadbed model, analyzing frequency, dispersion curves＇ difference in the model which generate from survey line arrangement, had bringed out the exam- ination determine empty longitudinal and the lateral attitude through the change survey line＇s method.