The digital image measurement method based on sub-pixel accurate corner locator is able to record the displacement of corner of squares on the surface of samples to acquire the strain field on the surface of samples at any time.The triaxial consolidated drained shear tests were conducted for loose and dense saturated Tangshan fine sand sampled with different initial sampling water content.By measuring the deformations in the axial and radial direction with digital image measurement system

the change relationship of the axial strain and radial strain during consolidation drained process was acquired.By drawing the field figures of axial strain and radial strain

the change rules of two strain fields were analyzed.The stress-strain curves of saturated samples with different initial sampling water ratio during shear process were obtained.The test results show that saturated samples prepared with different initial sampling water ratio have different initial structure

samples prepared with wet method and dry method present different deformation properties in consolidation drained process.The relations of stress-strain during shear process for loose and dense sand are effected by the initial sampling water ratio.The fundamental reason is that saturated samples with different initial sampling water ratio have different initial structure.