A Comparative Analysis of In Situ Testing Methods for Clay Strength Evaluation Using the Coupled Eulerian–Lagrangian Method
文献类型：期刊论文
| 作者 | Wang HB(王和博)1,2; Wang YF3 ; Li B(李彪)1,2; Qi WG(漆文刚)1,2; Wang N(汪宁)1,2
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| 刊名 | JOURNAL OF MARINE SCIENCE AND ENGINEERING
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| 出版日期 | 2025-05-01 |
| 卷号 | 13期号:5 |
| 关键词 | clay undrained shear strength strain softening strain rate CEL method |
| ISSN号 | 2077-1312 |
| DOI | 10.3390/jmse13050935 |
| 英文摘要 | The progression of marine resource exploration into deepwater and ultra-deepwater regions has intensified the requirement for precise quantification of the undrained shear strength of clay. Although diverse in situ testing methodologies—including the vane shear test (VST), cone penetration test (CPT), T-bar penetration test (TPT), and ball penetration test (BPT)—are widely utilized for the assessment of clay strength, systematic discrepancies and correlations between their derived measurements remain inadequately resolved. The aim of this work is to provide a systematic comparison of strength interpretations across different in situ testing methods, with emphasis on identifying method-specific biases under varying soil behaviors. To achieve this, a unified numerical simulation framework was developed to simulate these four prevalent testing techniques, employing large-deformation finite element analysis via the Coupled Eulerian–Lagrangian (CEL) approach. The model integrates critical constitutive behaviors of marine clays, specifically strain softening and strain rate dependency, to replicate in situ shear strength evolution. Rigorous sensitivity analyses confirm the model’s robustness. The results indicate that, when the stain rate and softening effects are neglected, the resistance factors from the CPT and VST remain largely insensitive to shear strength variations. However, T-bar and ball penetrometers tend to underestimate strength by up to 15% in high-strength soils due to the incomplete development of a full-flow failure mechanism. As a result, their application in high-strength soils is not recommended. With both the strain rate and softening effects considered, the interpreted strength value S ut from the CPT increases by 13.5% compared to cases excluding these effects, while other methods exhibit marginal decreases of 4–5%. The isolated analysis of strain softening reveals that, under identical softening parameters, the CPT demonstrates the least sensitivity to strain softening among the four methods examined, with the factor reduction ratio N s / N 0 ranging from 0.76 to 1.00, while the other three methods range from 0.65 to 0.88. The results indicate that the CPT is well suited for strength testing in soils exhibiting pronounced softening behavior, as it reduces the influence of strain softening on the measured results. These findings provide critical insights into method-specific biases in undrained shear strength assessments, supporting a more reliable interpretation of in situ test data for deepwater geotechnical applications. |
| 分类号 | 二类 |
| 语种 | 英语 |
| WOS记录号 | WOS:001496699300001 |
| 其他责任者 | 漆文刚 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/101465]  |
| 专题 | 力学研究所_流固耦合系统力学重点实验室(2012-) |
| 作者单位 | 1.中国科学院力学研究所; 2.中国科学院大学; 3.墨尔本大学; 4.Author to whom correspondence should be addresse |
| 推荐引用方式 GB/T 7714 | Wang HB,Wang YF,Li B,et al. A Comparative Analysis of In Situ Testing Methods for Clay Strength Evaluation Using the Coupled Eulerian–Lagrangian Method[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2025,13(5). |
| APA | 王和博,Wang YF,李彪,漆文刚,&汪宁.(2025).A Comparative Analysis of In Situ Testing Methods for Clay Strength Evaluation Using the Coupled Eulerian–Lagrangian Method.JOURNAL OF MARINE SCIENCE AND ENGINEERING,13(5). |
| MLA | 王和博,et al."A Comparative Analysis of In Situ Testing Methods for Clay Strength Evaluation Using the Coupled Eulerian–Lagrangian Method".JOURNAL OF MARINE SCIENCE AND ENGINEERING 13.5(2025). |
入库方式： OAI收割
来源：力学研究所
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