VIBRATION REDUCTION METHOD IN FOUNDATION ENVIRONMENT, AND WEIGHT FOR VIBRATION REDUCTION THEREFOR

PROBLEM TO BE SOLVED: To provide a method for easily predicting a reduction effect while reducing cost of vibration reduction in a foundation environment.SOLUTION: On a ground surface between a vibration source on the ground surface and an object of vibration reduction, a weight for reducing vibrations is laid in a columnar direction orthogonal to a straight line connecting centers of gravity of the vibration source and the object. A mass in the weight (a mass of the weight per meter with a width B and in the column direction) is represented as m=(1/(1+(α/R)))×m, where m=((1+ν)/π)ρ×√(Bλ), R is a target vibration reduction rate (reduction amount of vibration amplitude/original vibration amplitude), α is a surface wave contribution rate (0