Dynamic investigation on the coupled changing process of moisture and density fields in freezing soil

The data reflecting the change in density are obtained, with computer tomog raph scanning through the sample of freezing soil section by section at int ervals without destruction. Combined with the changing characteristics of w ater content along the sample during test, the dynamic coupled process of m oisture and density fields under the effect of temperature gradient on the freezing soil in closed system is discussed. The result reflects the intern al process of frost heave improvement resulting from the transfer of mass a nd heat.