Shear strength behavior of barind soil on triaxial extension stress path tests

摘要

In this study computer control hydraulic geotechnical digital system (GDS)triaxial equipment used for the evaluation of shear strength behavior of the barind (expansive)soil in tensile stress path test. The testing program intense on the study of normallyconsolidated drained triaxial extension tests on sample size 50 mm diameter and 100 mmhigh compacted barind (expansive) soil. Testing was carried out at consolidation pressuresranging between 100–500 kPa. The unload-reloading tests were done at confining pressure200 kPa for the determination of unload-reload model constants. The non-linear elasticmodel parameters for the compacted expansive soil were determined from these tests. Anattempt is made to verify the model parameters by comparing numerical predictions with theexperimental test results. Numerical analysis using hyperbolic model parameters indicatedgood agreement with the experimental results.