Abstract：On the basis of a variety of tests on both the intact and artificial structural loess specimens including lateral confined compression test，iso-water-content shear test，triaxial immersion deformation test，and iso-suction triaxial shear test，the collapse and deformation properties of loess are comprehensively studied in the paper，for the purpose of overcoming some disadvantages existing in current studies of structural loess. The test results demonstrate that the structural loess has a collapse surface which is independent of the generalized stress path，and its deformation characteristic has close relation with the loss of structural strength.
