Ground stiffness estimation system and ground stiffness estimation method

摘要

Problem to be solved: to provide a ground stiffness estimation system and a ground stiffness estimation method capable of efficiently evaluating the stiffness of the ground.The control unit 31 of the ground stiffness estimation system 30 acquires the measured values in the drilling depth measuring instrument 21, the flow rate measuring device 22, the current measuring device 23 and the vibration measuring instrument 24, and acquires a plurality of measurement values from this value.The control unit 31 calculates a multiple regression equation by performing a multivariate analysis using the obtained measurement value and the solid index value as an explanatory variable and an objective variable, and records the multiple regression equation in the multiple regression type storage unit 34.When the control unit 31 obtains a measured value for the excavation condition of the hole to be evaluated, the control unit 31 estimates the hardness index value in the ground excavated by the hole to be evaluated using the measured value and the multiple regression equation.Diagram