Sažetak
It has been observed that landslides of the flow failure type mostly occur in very fine sands or silty materials which are deposited in a very loose state. Soil response to excitation such as that in an earthquake can, to some extent, be determined from the monotonic undrained consolidated test. If during the undrained shearing, shear resistance monotonically increases, then the problem which has to be solved is the estimation of the possible deformation. But if the shear resistance decreases, which is characteristic of the loose silty and sandy soils, then possible deformation in the field may be of huge dimensions and catastrophic consequences. Such a phenomenon has been named flow failure. This study represents an investigation into the undrained behaviour of very loose silty soils, specially when flow failure occurs. Having in mind the difficulties connected with the testing of loose silty soils, both undisturbed and reconstituted, an attempt is made to explore the effects of the depositional mode. The other objective of the study is the analysis of the effects of the silt content.
Ključne riječi
silty soil sand residual strength normalization undrained behaviour loose state steady state quasi-steady state silt content
