状態依存のモール=クーロンモデルによる空洞膨張理論と,そのコーン貫通試験への応用
Baojian Li1, Sai Fu1, Xiaoyu Feng1
1PowerChina Huadong Engineering Corporation Limited, Hangzhou, China.
PloS one
|August 20, 2025
まとめ
この研究は,コーンの浸透テスト (CPT) で土壌の振る舞いをモデル化するために空洞膨張理論を使用し,校正室での境界効果分析を改善します. この方法は,臨界の深さとコーン抵抗を正確に予測し,土壌の特性測定をインサイトで改善します.
科学分野:
- 地質工学
- 土壌の力学
- インサイト試験
背景:
- コーンの浸透試験 (CPT) は,土壌の性質の評価に不可欠です.
- CPTの校正室試験は,土壌と堆積物の相互作用の研究に不可欠です.
- カリブレーション室の境界効果は,正確な土壌分析に課題をもたらします.
研究 の 目的:
- 穴の膨張理論を用いたCPT校正室試験における境界効果に対処する.
- 穴の膨張下で土壌のストレス-ストレスの振る舞いを半分析的な解決法を開発する.
- 穴の膨張とCPTコーンの抵抗との関係を確立する.
主な方法:
- 砂のモール=クーロンモデルを改変した空洞膨張理論を応用した.
- ストレスバランスと体積保存を組み合わせた PDE システムを開発した.
- PDEsを解決するためにハイブリッドのEulerian-Lagrangianアプローチを使用しました.
- 準分析溶液と正確な溶液を検証した.
主要な成果:
- 円筒型/球状の穴の膨張のための圧縮膨張と張力分布曲線を得ました.
- 提案された方法は,コンの浸透抵抗を持つ臨界深さの発展曲線を正確に予測します.
- 準分析解液の精度を正確な解液と比較して証明した.
結論:
- 穴の膨張理論は,CPT校正室試験を分析するための効果的な枠組みを提供します.
- 改良されたモール=クーロンモデルは 状態に依存する土壌特性を捉えます
- この研究は,特に境界効果に関して,CPTの結果の理解と予測の精度を高めます.
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