Various approaches to derive state of tailings materials on the basis of shear wave velocity measurement
Various approaches to derive state of tailings materials on the basis of shear wave velocity measurement
Undrained response of cohesionless soils to cyclic or monotonic loading might lead to liquefaction phenomenon, especially when material is in relatively loose or medium dense state. Such situations are often encountered in case of tailings storage facilities with special reference to those constructed by upstream method. High sensitivity of tailings material to sample disturbance create strong promise to look for alternative approaches than conventional sampling. The method based on laboratory measurement of shear wave velocity (VS) on reconstituted sample and combined with relevant VS values determined on undisturbed material in situ deserves special attention since VS reflects changes in state of stress and void ratio as well. The important issue of such approach is a formula which links shear wave velocity, void ratio and state of stress. The paper presents a three conceivable formulae which were derived on basis of comprehensive triaxial test program carried out on two batches of tailings with various amount of fines. Logarithm and various power function regressions were considered. After a brief explanation of the derivation basis for all the considered formulas, the results of projecting the correlation for the tailings profile were shown for selected granulation.
M. J. Lipinski; M. Wdowska; Intan Puspitaningrum
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
C - Risk analysis and safety evaluation
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