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Classifying Unsaturated Soils via Cone Penetration Testing

机译：通过锥形渗透测试对不饱和土壤进行分类

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The cone penetration test (CPT) can be used to estimate soil type using empirically developed classification charts. For the most part, these classification schemes involving tip resistance and skin friction measurements have proven quite reliable; however, their applicability to unsaturated soils is questionable. This paper presents results of cone penetration testing in unsaturated soils obtained from two different test sites containing fine-grained soils of low to high plasticity. Analysis of these data indicate matric suction can have a significant impact on CPT-based soil classification. Additional data obtained from previous studies and collected from the literature are used to demonstrate the impact of matric suction on CPT test parameters for a broader range of soil types including low to high plasticity fine-grained soils and sands. A preliminary framework for developing a CPT classification system for unsaturated soils that considers suction is presented.
机译：可以使用根据经验开发的分类表，使用锥形渗透试验（CPT）估算土壤类型。在大多数情况下，这些涉及端头阻力和皮肤摩擦力测量的分类方案已被证明是非常可靠的。然而，它们在非饱和土壤中的适用性值得怀疑。本文介绍了从两个不同的测试点获得的非饱和土壤的锥入度测试结果，这些测试点包含从低到高可塑性的细颗粒土壤。对这些数据的分析表明，基质吸力会对基于CPT的土壤分类产生重大影响。从以前的研究中获得并从文献中收集的其他数据用于证明基质吸力对更广泛的土壤类型（包括从低到高可塑性细粒土壤和沙土）的CPT测试参数的影响。提出了开发考虑吸力的非饱和土CPT分类系统的初步框架。

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