Soil body permeation-adsorption tester and testing method thereof

The invention discloses a soil body permeation-adsorption tester and a testing method thereof and relates to the technical field of civil engineering testing. The soil body permeation-adsorption tester comprises a confining pressure exerting and fluctuation measurement device, a liquid volume measurement device, a computer and a data acquisition system and further comprises a permeation and water injection device, a contaminating fluid injection device, an organic glass jar, a rubber mold, an upper steel column and a lower steel column, wherein a soil column is put in the rubber mold, air-permeable stones are put in the upper and lower portions of the soil column, the lower steel column supports and seals the lower portions of the lower air-permeable stones, the upper steel column is arranged on the upper air-permeable stones and is sealed, and the rubber mold, the upper steel column and the lower steel column are arranged in the sealed organic glass jar. The soil body permeation-adsorption tester can perform testing in different fluctuant axisymmetric stress states, can perform permeability determination through a variable head method and a hydrostatic head method, has the advantages of being accurate in measurement, high in accuracy and small in measurement result error and can further perform an adsorption test, and measurement results are more accurate. Resources are effectively utilized, the production cost is reduced, and the soil body permeation-adsorption tester is more flexible and convenient to use.