Study of the Steady State Behavior for Saturated Sand in Triaxial Test
Abstract：The steady state deformation occurs during undrained tests on fully saturated, loose sands after liquefaction has been achieved. Most loose sands exhibit the quasisteady state (QSS) behavior under undrained triaxial loading, in which no unique ultimate steady state is reached. The results of the present study indicate that the stress state of sand at a steady state deformation is determined by the void ratio alone. A series of experiments was carried out to measure the steady state for loose, medium dense and dense saturated sand in undrained triaxial tests. An advanced computer controlled triaxial testing system (MTS) was applied to this study. The test results show that the quasisteady state is governed by the confining stress and the void ratio. The relationship among these factors is discussed, as well as the strain quality while the steady state or quasi-steady state occurs. For dense samples, no temporary steady state often appears in some tests, so a discussed problem is put forward that the reason is that the shear stress zone occurring and extending results in the soil particles breakage; thus it influences test results.
Keywords：liquefaction steady state quasi-steady state triaxial test
Publication Date：1999-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 67-72 )