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

Table 1

The relative errors of height changes.

Relative errors of height (mm)	1	2	3	4	5	6	7	8	9
Calculation relative errors (%)	2.97	5.88	8.73	11.52	14.26	16.94	19.56	22.13	24.64