Ground penetrating radar based water content detection method for railroad bed

The invention relates to a ground penetrating radar based water content detection method for a railroad bed, and belongs to the technical field of railroad bed detection. The method is implemented by the following steps: detecting data segments by a ground penetrating radar of the railroad bed; performing power spectrum analysis on detection data; performing forward simulation and performing power spectrum analysis on simulation data; performing regression analysis; calculating the water content corresponding to each frequency band range; comprehensively evaluating the water content; and drawing a water content distribution curve of a detection line and identifying a water content abnormal region. According to the method, quick, nondestructive and efficient quantitative detection of water content distribution of the railway bed is realized, bases are provided for state detection evaluation of the railway bed, and railway maintenance and repair departments are assisted in timely mastering roadbed states and carrying out maintenance and repair work.