Study on the Calibration and Amendment Method of Falling Weight Deflectometer(FWD)

Based on studying working principle and practical applications of Falling Weight Deflectometer(FWD),the practical calibration method was put forward,working principle,operating instruction and application condition were expound also;in addition,the main influencing fact of deflectometer temperature amendment was get after quadrature analysis,and the formula of deflectometer temperature amendment was obtained by analysising bituminous pavement structural with BISAR3,it will offer reference to lay down calibration and amendment standard.