This paper studies the swelling deformationg of expansive soil and lime improving expansive soil by contrastive CBR tests,and the changing rule of swelling-quantity and time expanding-velocity has been gained,which is helpful to the engineering practice.

The author elaborates on the inflation earth characteristics and harms,analyses the lime improvement inflation earth reform mechanism,presents the technology of improvement inflation earth mixture,emphatically introduces the lime improvement inflation earth quality control and examination method,and the lime dosage diminishing law.

By the technique of sequent liquid flow method,the influence of lime amendment to phosphorus adsorption-desorption kinetics were studied in three acid soils.

The construction technology and quality control of the lime improved soil are comparatively complicated and there are many factors that influence the quality of the lime improved soil.

The article introduces roadbed-filling technique used in the experimental section DK80+DK80+975 of Hefei-Wuhan Passenger-dedicated Line, that is filling lime improved soil with road-mix method.

Contrast experimental study on calcareous soil amelioration and karst processes response;