摘要
This paper is to find out the strain property,distribution and its variation of the saturated expansive soil during its shrinking and cracking process under the condition of dehydration.Based on the measured strains and their variation,the paper obtained the characteristics of soil stain distribution and its temporal-spatial evolution process,especially the strain distribution on and around the first fissures.It is found that the soil shows global shrinkage initially with the reduction of soil moisture content.Afterwards,differentiation of the soil stains occurred,showing alternate distribution of tension and compression.