利用地脉动确定地基自振频率

本文根据实测资料和理论分析，研究了地脉动信号的平稳性、方向性及其频谱形状与地基传递函数之间的关系。在此基础上，提出了利用地脉动信号确定地基自振频率的方法。该方法能从整体上把握地基的自振特性，且测试简便、成本低、具有较大的工程应用价值。

Determination Of the Natural Frequencies of Soil Deposit by Ground Microtremors

By means of theoretical and experimental methods,the stationary and directional feature of ground mic-rotremor signals is presented. The relationship between the microtremor spectrum and the ground response spectrumis also studied. Based On these,a method of detennining the natural frequencies of soil deposit is suggested,accord-ing to the peak frequencies of the microtremors.The proposed method can readily be used on the ground surfacewithout drilling any boreholes,therefore,it is an economical and attractive way for engineering exploration .