The present invention discloses a high-precision continuous and
rapid detection method and
system for
subgrade humidity without damaging a pavement, and the method comprises the following steps: obtaining GPR map data and CCR map data of a road site to be detected; constructing a pavement material
dielectric constant-
moisture content relationship model, a pavement material resistivity-
moisture content relationship model, and a
subgrade filling resistivity-
moisture content relationship model; according to the obtained GPR map data, obtaining a pavement
layer thickness and a
dielectric constant, and according to the obtained pavement
layer thickness and the
dielectric constant, as well as the pavement material dielectric constant-moisture content relationship model, obtaining a pavement moisture content; and according to the CCR map data, the pavement thickness and the pavement moisture content, as well as the
subgrade filling resistivity-moisture content relationship model, obtaining a subgrade moisture content
spatial distribution. Through collecting
imaging data of the road to be detected, the present application constructs a moisture content relationship model and indirectly obtains the subgrade moisture content
spatial distribution, which has the advantages of not damaging the pavement, fast detection, continuous detection and high detection accuracy.