Soares, M.; Viana da Fonseca, A.; Ferreira, C.; Rios, S. Static Liquefaction Assessment Combining Shear Wave Velocity, Peak Strength and Soil Grading. Appl. Sci.2023, 13, 8580.
Soares, M.; Viana da Fonseca, A.; Ferreira, C.; Rios, S. Static Liquefaction Assessment Combining Shear Wave Velocity, Peak Strength and Soil Grading. Appl. Sci. 2023, 13, 8580.
Soares, M.; Viana da Fonseca, A.; Ferreira, C.; Rios, S. Static Liquefaction Assessment Combining Shear Wave Velocity, Peak Strength and Soil Grading. Appl. Sci.2023, 13, 8580.
Soares, M.; Viana da Fonseca, A.; Ferreira, C.; Rios, S. Static Liquefaction Assessment Combining Shear Wave Velocity, Peak Strength and Soil Grading. Appl. Sci. 2023, 13, 8580.
Abstract
A large set of undrained compression triaxial tests was carried out on different types of cohesionless soils, from sands to silty-sands and silts. Shear wave velocity measurements were carried out alongside. These tests exhibited distinct state transitions ranging from flow liquefaction to strain softening or strain hardening. With the purpose of defining a framework to assess soil liquefaction, it was found that the ratio between the shear wave velocity (VS0) and the peak undrained deviatoric stress, qpeak, VS0/qpeak, could be accurately used to define a boundary between liquefaction and strain hardening for sands, and between strain softening and strain hardening for silty-sands and silts. Since this ratio is a function of the tested material, it was also discovered that the prediction of these boundaries could be made as a function of soil grading, namely via the coefficient of uniformity, CU. Despite not being regarded as a strong geomechanical parameter, CU is easily determined from a grain-size distribution test and it has an empirically proven correlation with critical state parameters.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
