The structural characteristics exist in natural soft clay,which in the different areas and in different formation are not the same.In order to study the structural characteristics to affect the engineering characteristics of soft clay,taking the Huangshi soft clay,the Qingdao soft clay and the Zhangzhou soft clay as the studying objects and based on the contrasting physical and mechanical properties and indices of soft clay in typical areas of China,the structural characteristics are explained from the geol...