Static Liquefaction Assessment Combining Shear Wave Velocity, Peak Strength and Soil Grading

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Soares, M (Author) Other; A. Viana da Fonseca (Author) FEUP; Cristiana Ferreira (Author) FEUP; Sara Rios (Author) FEUP

Journal

Title: Applied Sciences

Vol. 13

Publisher: MDPI

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00Y-XEX

DOI: 10.3390/app13158580

Abstract (EN): 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 also carried out. These tests exhibit 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 (V-S(0)) and the peak undrained deviatoric stress (q(peak)), V-S(0)/q(peak), 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, the prediction of these boundaries can be made as a function of soil grading, namely via the coefficient of uniformity, C-U. Despite not being regarded as a strong geomechanical parameter, C-U is easily determined from a grain-size distribution test and has an empirically proven correlation with critical state parameters.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 18