天然地基动力参数(C_z、C_x、C_φ和D_z、D_(xφ))的确定方法一直为人们所关注。在现行的《动力机器基础设计规范》(以下简称《动规》)中,规定可以利用地基允许承载力R值对应确定抗压刚度系数C_z值,同时又强调用野外原位测试的方法确定C_z值的必要性。但是并没有明确指出采用何种方法较为合理。本文在比较各种原位方法的基础上,认为采用大面积的模型基础进行强迫振动试验具有一定的模拟性和可靠性。因为该法的测试结果比较稳定,且规律性较强,其实测的幅频反应曲线与理论计算的结果也很接近。但是该法在操怍、数据整理上颇为复 The determination method of the natural ground dynamic parameters (C_z, C_x, C_φ, D_z, D_(xφ)) has always been of concern. In the current “Code for Design of Power Machine Basics” (hereinafter referred to as “mobility regulations”), it is stipulated that the value of compressive stiffness coefficient C_z can be determined by using the allowable bearing capacity R value of the foundation, and at the same time, the method of field in-situ test is used to determine C_z. The necessity of value. However, it does not clearly indicate which method is more reasonable. On the basis of comparing various in-situ methods, this paper believes that the use of a large-scale model basis for forced vibration testing has a certain degree of simulation and reliability. Because the test results of this method are relatively stable, and the regularity is relatively strong, the measured amplitude-frequency response curve is close to the theoretical calculation result. However, this law is quite complex in terms of handling and data processing.