Volume 2, Issue 2 — Year 2025 — Article e100047

ISSN (Online): 3115-8129 Biannually

Geotechnical Correlation based on SPT-CPT Values for Fine-Grained Alluvium of the Kahrizak Formation

Article Type: Research
Pages: e100047
DOI: https://doi.org/10.22034/CGEL.2.2.e100047
Crossmark
Open Access
Authors
Affiliations
  1. Department of Geology, Shiraz Payam Noor University, Shiraz 1743638565, Iran
  2. Department of Geology, University of Isfahan, Isfahan 8174673441, Iran
Corresponding author
Email: a.ghazifard@sci.ui.ac.ir
ORCID: 0000-0003-1691-2891
Received: 28 August 2025 / Accepted: 2 October 2025 / Published: 22 October 2025
Abstract

In geotechnical engineering, the correlation between Standard Penetration Test (SPT) and Cone Penetration Test (CPT) values plays a crucial role in soil characterization. This study focuses on developing new empirical relationships based on SPT and CPT values in the fine-grained riverside alluvium of the Karrizak Formation in Tehran, southern Alborz, Iran. SPT-CPT data were extracted from various previous studies, encompassing diverse geological and geotechnical investigations. By analyzing these datasets, we identified patterns and trends that allowed us to establish improved correlations between SPT and CPT values with soil properties of this formation. Our approach integrates both statistical and empirical methods to ensure that the proposed relationships accurately reflect the mechanical behavior of the fine-grained alluvium in the study area. The developed correlations provide a more reliable framework for geoengineers and researchers working on subsurface investigations and foundation design in similar geological settings. These findings contribute to enhancing the predictive capabilities of geotechnical assessments and improving the overall reliability of soil parameter estimations.

Keywords

SPT-CPT correlation, fine-grained alluvium, Kahrizak Formation, geotechnical engineering, Tehran

Data availability statement

The data supporting the findings of this study are available within article. No publicly archived dataset was generated.

Funding

This research received no external funding.

Highlights
  • SPT and CPT correlations improve soil characterization
  • Empirical models reflect fine-grained alluvium behavior
  • Results support reliable geotechnical design
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How to cite
Nourani, N., & Ghazifard, A. (2025). Geotechnical Correlation based on SPT-CPT Values for Fine-Grained Alluvium of the Kahrizak Formation. Civil and Geoengineering Letters, 2(2), e100047. https://doi.org/10.22034/CGEL.2.2.e100047
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