{
  "abstract": "Estimating the preconsolidation pressure ($σ'_p$) from one-dimensional consolidation (oedometer) tests is critical in geotechnical engineering for settlement analysis. Traditional graphical methods, such as the Casagrande procedure, may introduce uncertainties, particularly when interpreting rounded $e$-log($P$) curves typical of disturbed specimens of soft clays and silt deposits. This paper introduces PyelogP, an open-source Python library designed to calculate $σ'_p$ using the strain-energy method proposed by Becker et al. (1987) as an automated and reproducible alternative. The algorithm combines natural cubic spline interpolation, knee-point detection via the Kneedle algorithm, and split-point linear regression within the work-pressure space. Physically informed thresholds, including overconsolidation ratio limits and second-derivative maxima (${d^2 e}/{d(\\log σ')^2}$), are incorporated to establish pre-yield and post-yield fitting boundaries. The performance of PyelogP is evaluated against a suite of 22 experimental consolidation datasets covering various clay deposits, including Saint-Alban clay and San Francisco Old Bay Clay. The results demonstrate strong agreement with the published values ($R^2$ = 0.912, RMSE = 0.374, MBE = -0.080), while the $O(N^2)$ algorithm requires only a few milliseconds per curve for typical oedometer datasets and less than 150 milliseconds for the largest datasets.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.09430",
  "author_total": 2,
  "authors": [
    {
      "name": "Liang Chern Chow"
    },
    {
      "name": "Thierno Kane"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bxm78w9e18169.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.09430",
  "fulltext_url": null,
  "id": "bxm78w9e18169",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.09430",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.geo-ph"
    ],
    [
      "openalex",
      "2205|Geotechnical Engineering and Soil Mechanics"
    ]
  ],
  "openalex": "W7212190589",
  "pdf_url": "https://arxiv.org/pdf/2609.09430",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bxm78w9e18169.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:12Z",
      "native_id": "2609.09430",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.09430"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "arxiv:physics.geo-ph",
      "subfield": "geophysics"
    }
  ],
  "title": "PyelogP: Automated Energy-Based Determination of Preconsolidation Pressure in Clay Deposits",
  "title_text": "PyelogP: Automated Energy-Based Determination of Preconsolidation Pressure in Clay Deposits",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:12Z",
  "url": "https://research.draconitic.com/paper/bxm78w9e18169",
  "venue": "arXiv",
  "versions": []
}