Method Improvements of Testing Modulus of Soil Based on Free-Vibration Column

<div>Functional division of free-vibration column of GZZ-50: ① test type, ② data records of accelerometer, ③ exciting force of drive board, ④ results of Fourier transform, ⑤ date records of other information, ⑥ results of test, ⑦ test parameters, and ⑧ test controller.</div>

Advances in Civil Engineering

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Figure 15

Figure 15: Method Improvements of Testing Modulus of Soil Based on Free-Vibration Column 