Estimated columnar drawing creation method and program by microtremor measurement

摘要

PROBLEM TO BE SOLVED: To provide a ground investigation method which compensates or replaces a conventional ground investigation method, and can be implemented with space saving, low noise and low cost in short time.;SOLUTION: An estimation columnar diagram creation method includes: an Hfi/Vfi ratio calculation step of calculating an Hfi/Vfi ratio obtained by dividing a Fourier amplitude Hfi corresponding to a period Ti (i=1,2,3,...n (the number of layers)) of a horizontal component of microtremor of a ground measured with one microtremor measurement sensor by a Fourier amplitude Vfi corresponding to the period Ti of a vertical component of microtremor, at an arbitrary measurement point of the ground surface; and an estimation columnar diagram creation step of determining an Ni value in a depth Hi from a relationship between the period Ti and the depth Hi from the ground surface and a relationship between the Hfi/Vfi ratio and the Ni value, and creating an estimation columnar diagram at the measurement point.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2020,JPO&INPIT