Development of empirical CPTu-Vs correlations for post-glacial sediments in Southern Quebec, Canada, in consideration of soil type and geological setting. Issue 154 (March 2022)

• Record Type: Journal Article
• Authors: Salsabili, Mohammad; Saeidi, Ali; Rouleau, Alain; Nastev, Miroslav
• Is Part Of: Soil dynamics and earthquake engineering. Issue 154(2022)
• Publication Date: 2022-03
• Subjects: Piezocone penetration test (CPTu) -- Shear wave velocity -- Seismic piezocone (SCPTu) -- Multiple nonlinear regression -- Empirical correlation -- Soil behaviour type (SBT); Soil dynamics -- Periodicals; Earthquake engineering -- Periodicals; Sols -- Dynamique -- Périodiques; Génie parasismique -- Périodiques; 624.176205
• DOI: 10.1016/j.soildyn.2021.107131
• Languages: English
• ISSNs: 0267-7261

Abstract

Abstract: The correlation of shear wave velocity ( V s ) with piezocone penetration test (CPTu) parameters is investigated in post-glacial sediments along the St. Lawrence and Saguenay rivers, Southern Quebec, Canada. The compiled database includes 991 CPTu- V s measurements at 40 sites. The objectives are to examine the applicability of existing CPTu- V s correlations, identify the main CPTu parameters and develop specific CPTu- V s correlations that account for the effects of soil type (sandy or clayey) and geological setting (Champlain or Laflamme sea sediments). Results reveal that the application of existing correlations is biased in varying degrees, denoting a need for site-specific correlations for the study area. Multivariate regression analyses confirm the importance of cone tip resistance and depth as V s predictors assisted by normalised pore pressure and soil behaviour type index. Consideration of soil type and geological setting helps reduce uncertainties in CPTu- Vs correlations for fine-grained soils. Highlights: Seismic piezocone data for coarse-to fine-grained soils are analysed. Existing piezocone penetration (CPTu) vs shear wave velocity ( V s ) correlations are evaluated. The V s prediction ability of different CPTu parameters is analysed. Representative correlations considering CPTu-based indexes are proposed. The effect of the geological setting on CPTu- V s correlation is examined.