Indoor calibration device and calibration method for compaction detection depth of medium and coarse particle fillers

The invention discloses an indoor calibration device and a calibration method for the depth of compaction detection of medium and coarse particle fillers. The indoor calibration device comprises stacked molds with large and small sizes, a confining pressure regulating device, a dynamic rebound modulus detector, an earth pressure box and a dynamic strain collector. The earth pressure box is placedin the middle of the bottom of the mold of the first layer and is connected with the dynamic strain collector. The calibration method comprises the steps that an impact dynamic load is applied on thetop of filling; the earth pressure box is used to detect dynamic stress transmitted from the upper filling; according to the stress ratio of the filling under the condition of the molds of two sizes,the size effect coefficients of the indoor molds are determined; and according to the stack number of the molds and the stress value of the earth pressure box, the stress influence depth of the dynamic load in the filling under