| Issue |
E3S Web Conf.
Volume 730, 2026
International Conference on Advances and Innovations in Soft Soil Engineering (Soft Soils 2026)
|
|
|---|---|---|
| Article Number | 01006 | |
| Number of page(s) | 6 | |
| Section | Field and Laboratory Testing | |
| DOI | https://doi.org/10.1051/e3sconf/202673001006 | |
| Published online | 03 August 2026 | |
Evaluating sampling quality and its impact on deformation properties of Coode Island Silt
1 Department of Infrastructure Engineering, The University of Melbourne, Melbourne, Australia
2 Black In-situ Testing, Australia
* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.
Abstract
This study investigates effects of sampling quality on the primary consolidation and secondary (creep) deformation behavior of Coode Island Silt (CIS), a problematic Australian soft soil. Samples collected using Block, BIT (modified fixed piston), and Shelby tube samplers were tested with Incremental Loading (IL) and multi-stage creep oedometer tests. Using the Lunne’s criterion, Block samples were assessed as “Good to fair” quality (Δe/e₀ = 0.061), while BIT (Δe/e₀ = 0.094) and Shelby tube (Δe/e₀ = 0.13) were classified as “Poor”. Reduced sample quality led to lower compression and creep indices (up to 38% and 26%, respectively, when compared against Block sample) and greater deviation from in-situ cone penetration correlated values. The analysis of a trial embankment demonstrated the significant effect of sample quality on the settlement predictions.
© The Authors, published by EDP Sciences, 2026
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