Cone penetration tests (CPTs) can quantitatively inform about the mechanical state of a sand. However, relating measured cone resistance values to sand state requires complex back-analysis of the processes occurring in the soil during the test. This paper provides new evidence of the value added in this area by modern large-deformation modelling based on the material point method (MPM). It is shown that accurate simulation of the relationship between cone resistance and sand state can be achieved, on condition that the constitutive behaviour of the soil – and especially its critical state features – is adequately modelled over a wide range of confining pressures. This study relies on the predictive capabilities of the critical state NorSand model, and shows how previous calibrations endeavours from the literature (based on triaxial test results) can support the MPM simulation of unrelated CPT results obtained through calibration chamber tests. MPM CPT simulations of ever-increasing quality will positively impact the state of the art of CPT interpretation procedures, to date still largely based on simplified cavity expansion theories.

中文翻译：

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使用材料点法将锥体穿透阻力与砂态联系起来

锥形渗透测试 (CPT) 可以定量地告知沙子的机械状态。然而，将测得的锥体阻力值与沙状态相关联需要对测试期间土壤中发生的过程进行复杂的反向分析。本文通过基于质点法 (MPM) 的现代大变形建模为该领域的附加值提供了新的证据。结果表明，在土壤的本构行为——尤其是其临界状态特征——在广泛的围压范围内得到充分模拟的情况下，可以实现对锥体阻力和砂状态之间关系的精确模拟。这项研究依赖于临界状态 NorSand 模型的预测能力，并展示了文献中的先前校准工作（基于三轴测试结果）如何支持通过校准室测试获得的不相关 CPT 结果的 MPM 模拟。质量不断提高的 MPM CPT 模拟将对 CPT 解释程序的最新技术产生积极影响，迄今为止仍主要基于简化的空腔膨胀理论。