Based on Tianjin marine soft clay

triaxial tests are carried out on the intact soil and remolded soil in different test conditions

such as consolidation pressure

stress path

loading rate

drainage condition. The structural damage is described by the relationship between stress ratio structural parameter and strain. The character of structural damage under different loading modes is studied. The results indicate that when the consolidation pressure is below structure yielding pressure

the initial structure and damage rate in the shearing stage are not influenced by consolidation pressure. When consolidation pressure is above structure yielding pressure

the initial structure and damage rate decrease with the increasing of consolidation pressure. When the direction angle of stress path ? is in the ranges of 0 /2 and ? <3?/2

the damage rate increases with the increasing of angle ?. When the angle ? is in the ranges of ?/2 and 3?/ 2 <2?

the damage rate decreases with the increasing of the angle ?. In every ?/2 range

the amount of initial structure falls and rises when the angle ? increases. The initial structure and damage rate increase with the increasing of shearing rate. The initial structural and structural damage rate in drained shearing are larger than that of undrained shearing.