Abstract: The variation of transverse relaxation time of three types of saturated compacted cohesive soil samples with temperature from 18 ℃ to 75 ℃ was measured by the nuclear magnetic resonance (NMR). The apparent activation energy ΔE of pore water in three types of cohesive soil samples was measured. The soil sample A with the largest specific surface area and the cation exchange capacity has the largest ΔE. For the soil samples B and C, ΔE < 0. This abnormal phenomenon may be due to the high content of kaolinite and illite in the clay minerals of these two cohesive soil samples, and the high adsorption energy of water molecules on the surface of these two minerals. Finally, the change of permeability coefficient of different types of cohesive soil samples with temperature is qualitatively analyzed. The positive ΔE indicates that the permeability coefficient of soil sample A increases with the increase of temperature; Negative ΔE indicates that the permeability coefficient of soil samples B and C decreases with the increase of temperature.

Key words: Temperature Effect, Transverse Relaxation Time, Cohesive Soil, Pore Water State, Apparent Activation Energy